Migrate to golang1.5 release with GO15VENDOREXPERIMENT=1 enabled

vendor/github.com/gorilla/context/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2012 Rodrigo Moraes. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+	 * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+	 * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+	 * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/gorilla/context/README.md

@@ -0,0 +1,7 @@
+context
+=======
+[![Build Status](https://travis-ci.org/gorilla/context.png?branch=master)](https://travis-ci.org/gorilla/context)
+
+gorilla/context is a general purpose registry for global request variables.
+
+Read the full documentation here: http://www.gorillatoolkit.org/pkg/context

vendor/github.com/gorilla/context/context.go

@@ -0,0 +1,143 @@
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package context
+
+import (
+	"net/http"
+	"sync"
+	"time"
+)
+
+var (
+	mutex sync.RWMutex
+	data  = make(map[*http.Request]map[interface{}]interface{})
+	datat = make(map[*http.Request]int64)
+)
+
+// Set stores a value for a given key in a given request.
+func Set(r *http.Request, key, val interface{}) {
+	mutex.Lock()
+	if data[r] == nil {
+		data[r] = make(map[interface{}]interface{})
+		datat[r] = time.Now().Unix()
+	}
+	data[r][key] = val
+	mutex.Unlock()
+}
+
+// Get returns a value stored for a given key in a given request.
+func Get(r *http.Request, key interface{}) interface{} {
+	mutex.RLock()
+	if ctx := data[r]; ctx != nil {
+		value := ctx[key]
+		mutex.RUnlock()
+		return value
+	}
+	mutex.RUnlock()
+	return nil
+}
+
+// GetOk returns stored value and presence state like multi-value return of map access.
+func GetOk(r *http.Request, key interface{}) (interface{}, bool) {
+	mutex.RLock()
+	if _, ok := data[r]; ok {
+		value, ok := data[r][key]
+		mutex.RUnlock()
+		return value, ok
+	}
+	mutex.RUnlock()
+	return nil, false
+}
+
+// GetAll returns all stored values for the request as a map. Nil is returned for invalid requests.
+func GetAll(r *http.Request) map[interface{}]interface{} {
+	mutex.RLock()
+	if context, ok := data[r]; ok {
+		result := make(map[interface{}]interface{}, len(context))
+		for k, v := range context {
+			result[k] = v
+		}
+		mutex.RUnlock()
+		return result
+	}
+	mutex.RUnlock()
+	return nil
+}
+
+// GetAllOk returns all stored values for the request as a map and a boolean value that indicates if
+// the request was registered.
+func GetAllOk(r *http.Request) (map[interface{}]interface{}, bool) {
+	mutex.RLock()
+	context, ok := data[r]
+	result := make(map[interface{}]interface{}, len(context))
+	for k, v := range context {
+		result[k] = v
+	}
+	mutex.RUnlock()
+	return result, ok
+}
+
+// Delete removes a value stored for a given key in a given request.
+func Delete(r *http.Request, key interface{}) {
+	mutex.Lock()
+	if data[r] != nil {
+		delete(data[r], key)
+	}
+	mutex.Unlock()
+}
+
+// Clear removes all values stored for a given request.
+//
+// This is usually called by a handler wrapper to clean up request
+// variables at the end of a request lifetime. See ClearHandler().
+func Clear(r *http.Request) {
+	mutex.Lock()
+	clear(r)
+	mutex.Unlock()
+}
+
+// clear is Clear without the lock.
+func clear(r *http.Request) {
+	delete(data, r)
+	delete(datat, r)
+}
+
+// Purge removes request data stored for longer than maxAge, in seconds.
+// It returns the amount of requests removed.
+//
+// If maxAge <= 0, all request data is removed.
+//
+// This is only used for sanity check: in case context cleaning was not
+// properly set some request data can be kept forever, consuming an increasing
+// amount of memory. In case this is detected, Purge() must be called
+// periodically until the problem is fixed.
+func Purge(maxAge int) int {
+	mutex.Lock()
+	count := 0
+	if maxAge <= 0 {
+		count = len(data)
+		data = make(map[*http.Request]map[interface{}]interface{})
+		datat = make(map[*http.Request]int64)
+	} else {
+		min := time.Now().Unix() - int64(maxAge)
+		for r := range data {
+			if datat[r] < min {
+				clear(r)
+				count++
+			}
+		}
+	}
+	mutex.Unlock()
+	return count
+}
+
+// ClearHandler wraps an http.Handler and clears request values at the end
+// of a request lifetime.
+func ClearHandler(h http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		defer Clear(r)
+		h.ServeHTTP(w, r)
+	})
+}

vendor/github.com/gorilla/context/context_test.go

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+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package context
+
+import (
+	"net/http"
+	"testing"
+)
+
+type keyType int
+
+const (
+	key1 keyType = iota
+	key2
+)
+
+func TestContext(t *testing.T) {
+	assertEqual := func(val interface{}, exp interface{}) {
+		if val != exp {
+			t.Errorf("Expected %v, got %v.", exp, val)
+		}
+	}
+
+	r, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
+	emptyR, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
+
+	// Get()
+	assertEqual(Get(r, key1), nil)
+
+	// Set()
+	Set(r, key1, "1")
+	assertEqual(Get(r, key1), "1")
+	assertEqual(len(data[r]), 1)
+
+	Set(r, key2, "2")
+	assertEqual(Get(r, key2), "2")
+	assertEqual(len(data[r]), 2)
+
+	//GetOk
+	value, ok := GetOk(r, key1)
+	assertEqual(value, "1")
+	assertEqual(ok, true)
+
+	value, ok = GetOk(r, "not exists")
+	assertEqual(value, nil)
+	assertEqual(ok, false)
+
+	Set(r, "nil value", nil)
+	value, ok = GetOk(r, "nil value")
+	assertEqual(value, nil)
+	assertEqual(ok, true)
+
+	// GetAll()
+	values := GetAll(r)
+	assertEqual(len(values), 3)
+
+	// GetAll() for empty request
+	values = GetAll(emptyR)
+	if values != nil {
+		t.Error("GetAll didn't return nil value for invalid request")
+	}
+
+	// GetAllOk()
+	values, ok = GetAllOk(r)
+	assertEqual(len(values), 3)
+	assertEqual(ok, true)
+
+	// GetAllOk() for empty request
+	values, ok = GetAllOk(emptyR)
+	assertEqual(value, nil)
+	assertEqual(ok, false)
+
+	// Delete()
+	Delete(r, key1)
+	assertEqual(Get(r, key1), nil)
+	assertEqual(len(data[r]), 2)
+
+	Delete(r, key2)
+	assertEqual(Get(r, key2), nil)
+	assertEqual(len(data[r]), 1)
+
+	// Clear()
+	Clear(r)
+	assertEqual(len(data), 0)
+}
+
+func parallelReader(r *http.Request, key string, iterations int, wait, done chan struct{}) {
+	<-wait
+	for i := 0; i < iterations; i++ {
+		Get(r, key)
+	}
+	done <- struct{}{}
+
+}
+
+func parallelWriter(r *http.Request, key, value string, iterations int, wait, done chan struct{}) {
+	<-wait
+	for i := 0; i < iterations; i++ {
+		Set(r, key, value)
+	}
+	done <- struct{}{}
+
+}
+
+func benchmarkMutex(b *testing.B, numReaders, numWriters, iterations int) {
+
+	b.StopTimer()
+	r, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
+	done := make(chan struct{})
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		wait := make(chan struct{})
+
+		for i := 0; i < numReaders; i++ {
+			go parallelReader(r, "test", iterations, wait, done)
+		}
+
+		for i := 0; i < numWriters; i++ {
+			go parallelWriter(r, "test", "123", iterations, wait, done)
+		}
+
+		close(wait)
+
+		for i := 0; i < numReaders+numWriters; i++ {
+			<-done
+		}
+
+	}
+
+}
+
+func BenchmarkMutexSameReadWrite1(b *testing.B) {
+	benchmarkMutex(b, 1, 1, 32)
+}
+func BenchmarkMutexSameReadWrite2(b *testing.B) {
+	benchmarkMutex(b, 2, 2, 32)
+}
+func BenchmarkMutexSameReadWrite4(b *testing.B) {
+	benchmarkMutex(b, 4, 4, 32)
+}
+func BenchmarkMutex1(b *testing.B) {
+	benchmarkMutex(b, 2, 8, 32)
+}
+func BenchmarkMutex2(b *testing.B) {
+	benchmarkMutex(b, 16, 4, 64)
+}
+func BenchmarkMutex3(b *testing.B) {
+	benchmarkMutex(b, 1, 2, 128)
+}
+func BenchmarkMutex4(b *testing.B) {
+	benchmarkMutex(b, 128, 32, 256)
+}
+func BenchmarkMutex5(b *testing.B) {
+	benchmarkMutex(b, 1024, 2048, 64)
+}
+func BenchmarkMutex6(b *testing.B) {
+	benchmarkMutex(b, 2048, 1024, 512)
+}

vendor/github.com/gorilla/context/doc.go

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+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package context stores values shared during a request lifetime.
+
+For example, a router can set variables extracted from the URL and later
+application handlers can access those values, or it can be used to store
+sessions values to be saved at the end of a request. There are several
+others common uses.
+
+The idea was posted by Brad Fitzpatrick to the go-nuts mailing list:
+
+	http://groups.google.com/group/golang-nuts/msg/e2d679d303aa5d53
+
+Here's the basic usage: first define the keys that you will need. The key
+type is interface{} so a key can be of any type that supports equality.
+Here we define a key using a custom int type to avoid name collisions:
+
+	package foo
+
+	import (
+		"github.com/gorilla/context"
+	)
+
+	type key int
+
+	const MyKey key = 0
+
+Then set a variable. Variables are bound to an http.Request object, so you
+need a request instance to set a value:
+
+	context.Set(r, MyKey, "bar")
+
+The application can later access the variable using the same key you provided:
+
+	func MyHandler(w http.ResponseWriter, r *http.Request) {
+		// val is "bar".
+		val := context.Get(r, foo.MyKey)
+
+		// returns ("bar", true)
+		val, ok := context.GetOk(r, foo.MyKey)
+		// ...
+	}
+
+And that's all about the basic usage. We discuss some other ideas below.
+
+Any type can be stored in the context. To enforce a given type, make the key
+private and wrap Get() and Set() to accept and return values of a specific
+type:
+
+	type key int
+
+	const mykey key = 0
+
+	// GetMyKey returns a value for this package from the request values.
+	func GetMyKey(r *http.Request) SomeType {
+		if rv := context.Get(r, mykey); rv != nil {
+			return rv.(SomeType)
+		}
+		return nil
+	}
+
+	// SetMyKey sets a value for this package in the request values.
+	func SetMyKey(r *http.Request, val SomeType) {
+		context.Set(r, mykey, val)
+	}
+
+Variables must be cleared at the end of a request, to remove all values
+that were stored. This can be done in an http.Handler, after a request was
+served. Just call Clear() passing the request:
+
+	context.Clear(r)
+
+...or use ClearHandler(), which conveniently wraps an http.Handler to clear
+variables at the end of a request lifetime.
+
+The Routers from the packages gorilla/mux and gorilla/pat call Clear()
+so if you are using either of them you don't need to clear the context manually.
+*/
+package context

vendor/github.com/gorilla/mux/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2012 Rodrigo Moraes. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+	 * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+	 * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+	 * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/gorilla/mux/README.md

@@ -0,0 +1,235 @@
+mux
+===
+[![GoDoc](https://godoc.org/github.com/gorilla/securecookie?status.svg)](https://godoc.org/github.com/gorilla/securecookie)
+[![Build Status](https://travis-ci.org/gorilla/mux.png?branch=master)](https://travis-ci.org/gorilla/mux)
+
+Package gorilla/mux implements a request router and dispatcher.
+
+The name mux stands for "HTTP request multiplexer". Like the standard
+http.ServeMux, mux.Router matches incoming requests against a list of
+registered routes and calls a handler for the route that matches the URL
+or other conditions. The main features are:
+
+	* Requests can be matched based on URL host, path, path prefix, schemes,
+	  header and query values, HTTP methods or using custom matchers.
+	* URL hosts and paths can have variables with an optional regular
+	  expression.
+	* Registered URLs can be built, or "reversed", which helps maintaining
+	  references to resources.
+	* Routes can be used as subrouters: nested routes are only tested if the
+	  parent route matches. This is useful to define groups of routes that
+	  share common conditions like a host, a path prefix or other repeated
+	  attributes. As a bonus, this optimizes request matching.
+	* It implements the http.Handler interface so it is compatible with the
+	  standard http.ServeMux.
+
+Let's start registering a couple of URL paths and handlers:
+
+	func main() {
+		r := mux.NewRouter()
+		r.HandleFunc("/", HomeHandler)
+		r.HandleFunc("/products", ProductsHandler)
+		r.HandleFunc("/articles", ArticlesHandler)
+		http.Handle("/", r)
+	}
+
+Here we register three routes mapping URL paths to handlers. This is
+equivalent to how http.HandleFunc() works: if an incoming request URL matches
+one of the paths, the corresponding handler is called passing
+(http.ResponseWriter, *http.Request) as parameters.
+
+Paths can have variables. They are defined using the format {name} or
+{name:pattern}. If a regular expression pattern is not defined, the matched
+variable will be anything until the next slash. For example:
+
+	r := mux.NewRouter()
+	r.HandleFunc("/products/{key}", ProductHandler)
+	r.HandleFunc("/articles/{category}/", ArticlesCategoryHandler)
+	r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler)
+
+The names are used to create a map of route variables which can be retrieved
+calling mux.Vars():
+
+	vars := mux.Vars(request)
+	category := vars["category"]
+
+And this is all you need to know about the basic usage. More advanced options
+are explained below.
+
+Routes can also be restricted to a domain or subdomain. Just define a host
+pattern to be matched. They can also have variables:
+
+	r := mux.NewRouter()
+	// Only matches if domain is "www.domain.com".
+	r.Host("www.domain.com")
+	// Matches a dynamic subdomain.
+	r.Host("{subdomain:[a-z]+}.domain.com")
+
+There are several other matchers that can be added. To match path prefixes:
+
+	r.PathPrefix("/products/")
+
+...or HTTP methods:
+
+	r.Methods("GET", "POST")
+
+...or URL schemes:
+
+	r.Schemes("https")
+
+...or header values:
+
+	r.Headers("X-Requested-With", "XMLHttpRequest")
+
+...or query values:
+
+	r.Queries("key", "value")
+
+...or to use a custom matcher function:
+
+	r.MatcherFunc(func(r *http.Request, rm *RouteMatch) bool {
+		return r.ProtoMajor == 0
+	})
+
+...and finally, it is possible to combine several matchers in a single route:
+
+	r.HandleFunc("/products", ProductsHandler).
+	  Host("www.domain.com").
+	  Methods("GET").
+	  Schemes("http")
+
+Setting the same matching conditions again and again can be boring, so we have
+a way to group several routes that share the same requirements.
+We call it "subrouting".
+
+For example, let's say we have several URLs that should only match when the
+host is "www.domain.com". Create a route for that host and get a "subrouter"
+from it:
+
+	r := mux.NewRouter()
+	s := r.Host("www.domain.com").Subrouter()
+
+Then register routes in the subrouter:
+
+	s.HandleFunc("/products/", ProductsHandler)
+	s.HandleFunc("/products/{key}", ProductHandler)
+	s.HandleFunc("/articles/{category}/{id:[0-9]+}"), ArticleHandler)
+
+The three URL paths we registered above will only be tested if the domain is
+"www.domain.com", because the subrouter is tested first. This is not
+only convenient, but also optimizes request matching. You can create
+subrouters combining any attribute matchers accepted by a route.
+
+Subrouters can be used to create domain or path "namespaces": you define
+subrouters in a central place and then parts of the app can register its
+paths relatively to a given subrouter.
+
+There's one more thing about subroutes. When a subrouter has a path prefix,
+the inner routes use it as base for their paths:
+
+	r := mux.NewRouter()
+	s := r.PathPrefix("/products").Subrouter()
+	// "/products/"
+	s.HandleFunc("/", ProductsHandler)
+	// "/products/{key}/"
+	s.HandleFunc("/{key}/", ProductHandler)
+	// "/products/{key}/details"
+	s.HandleFunc("/{key}/details", ProductDetailsHandler)
+
+Now let's see how to build registered URLs.
+
+Routes can be named. All routes that define a name can have their URLs built,
+or "reversed". We define a name calling Name() on a route. For example:
+
+	r := mux.NewRouter()
+	r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).
+	  Name("article")
+
+To build a URL, get the route and call the URL() method, passing a sequence of
+key/value pairs for the route variables. For the previous route, we would do:
+
+	url, err := r.Get("article").URL("category", "technology", "id", "42")
+
+...and the result will be a url.URL with the following path:
+
+	"/articles/technology/42"
+
+This also works for host variables:
+
+	r := mux.NewRouter()
+	r.Host("{subdomain}.domain.com").
+	  Path("/articles/{category}/{id:[0-9]+}").
+	  HandlerFunc(ArticleHandler).
+	  Name("article")
+
+	// url.String() will be "http://news.domain.com/articles/technology/42"
+	url, err := r.Get("article").URL("subdomain", "news",
+	                                 "category", "technology",
+	                                 "id", "42")
+
+All variables defined in the route are required, and their values must
+conform to the corresponding patterns. These requirements guarantee that a
+generated URL will always match a registered route -- the only exception is
+for explicitly defined "build-only" routes which never match.
+
+Regex support also exists for matching Headers within a route. For example, we could do:
+
+	r.HeadersRegexp("Content-Type", "application/(text|json)")
+
+...and the route will match both requests with a Content-Type of `application/json` as well as
+`application/text`
+
+There's also a way to build only the URL host or path for a route:
+use the methods URLHost() or URLPath() instead. For the previous route,
+we would do:
+
+	// "http://news.domain.com/"
+	host, err := r.Get("article").URLHost("subdomain", "news")
+
+	// "/articles/technology/42"
+	path, err := r.Get("article").URLPath("category", "technology", "id", "42")
+
+And if you use subrouters, host and path defined separately can be built
+as well:
+
+	r := mux.NewRouter()
+	s := r.Host("{subdomain}.domain.com").Subrouter()
+	s.Path("/articles/{category}/{id:[0-9]+}").
+	  HandlerFunc(ArticleHandler).
+	  Name("article")
+
+	// "http://news.domain.com/articles/technology/42"
+	url, err := r.Get("article").URL("subdomain", "news",
+	                                 "category", "technology",
+	                                 "id", "42")
+
+## Full Example
+
+Here's a complete, runnable example of a small mux based server:
+
+```go
+package main
+
+import (
+	"net/http"
+
+	"github.com/gorilla/mux"
+)
+
+func YourHandler(w http.ResponseWriter, r *http.Request) {
+	w.Write([]byte("Gorilla!\n"))
+}
+
+func main() {
+	r := mux.NewRouter()
+	// Routes consist of a path and a handler function.
+	r.HandleFunc("/", YourHandler)
+
+	// Bind to a port and pass our router in
+	http.ListenAndServe(":8000", r)
+}
+```
+
+## License
+
+BSD licensed. See the LICENSE file for details.

vendor/github.com/gorilla/mux/bench_test.go

@@ -0,0 +1,21 @@
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package mux
+
+import (
+	"net/http"
+	"testing"
+)
+
+func BenchmarkMux(b *testing.B) {
+	router := new(Router)
+	handler := func(w http.ResponseWriter, r *http.Request) {}
+	router.HandleFunc("/v1/{v1}", handler)
+
+	request, _ := http.NewRequest("GET", "/v1/anything", nil)
+	for i := 0; i < b.N; i++ {
+		router.ServeHTTP(nil, request)
+	}
+}

vendor/github.com/gorilla/mux/doc.go

@@ -0,0 +1,206 @@
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package gorilla/mux implements a request router and dispatcher.
+
+The name mux stands for "HTTP request multiplexer". Like the standard
+http.ServeMux, mux.Router matches incoming requests against a list of
+registered routes and calls a handler for the route that matches the URL
+or other conditions. The main features are:
+
+	* Requests can be matched based on URL host, path, path prefix, schemes,
+	  header and query values, HTTP methods or using custom matchers.
+	* URL hosts and paths can have variables with an optional regular
+	  expression.
+	* Registered URLs can be built, or "reversed", which helps maintaining
+	  references to resources.
+	* Routes can be used as subrouters: nested routes are only tested if the
+	  parent route matches. This is useful to define groups of routes that
+	  share common conditions like a host, a path prefix or other repeated
+	  attributes. As a bonus, this optimizes request matching.
+	* It implements the http.Handler interface so it is compatible with the
+	  standard http.ServeMux.
+
+Let's start registering a couple of URL paths and handlers:
+
+	func main() {
+		r := mux.NewRouter()
+		r.HandleFunc("/", HomeHandler)
+		r.HandleFunc("/products", ProductsHandler)
+		r.HandleFunc("/articles", ArticlesHandler)
+		http.Handle("/", r)
+	}
+
+Here we register three routes mapping URL paths to handlers. This is
+equivalent to how http.HandleFunc() works: if an incoming request URL matches
+one of the paths, the corresponding handler is called passing
+(http.ResponseWriter, *http.Request) as parameters.
+
+Paths can have variables. They are defined using the format {name} or
+{name:pattern}. If a regular expression pattern is not defined, the matched
+variable will be anything until the next slash. For example:
+
+	r := mux.NewRouter()
+	r.HandleFunc("/products/{key}", ProductHandler)
+	r.HandleFunc("/articles/{category}/", ArticlesCategoryHandler)
+	r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler)
+
+The names are used to create a map of route variables which can be retrieved
+calling mux.Vars():
+
+	vars := mux.Vars(request)
+	category := vars["category"]
+
+And this is all you need to know about the basic usage. More advanced options
+are explained below.
+
+Routes can also be restricted to a domain or subdomain. Just define a host
+pattern to be matched. They can also have variables:
+
+	r := mux.NewRouter()
+	// Only matches if domain is "www.domain.com".
+	r.Host("www.domain.com")
+	// Matches a dynamic subdomain.
+	r.Host("{subdomain:[a-z]+}.domain.com")
+
+There are several other matchers that can be added. To match path prefixes:
+
+	r.PathPrefix("/products/")
+
+...or HTTP methods:
+
+	r.Methods("GET", "POST")
+
+...or URL schemes:
+
+	r.Schemes("https")
+
+...or header values:
+
+	r.Headers("X-Requested-With", "XMLHttpRequest")
+
+...or query values:
+
+	r.Queries("key", "value")
+
+...or to use a custom matcher function:
+
+	r.MatcherFunc(func(r *http.Request, rm *RouteMatch) bool {
+		return r.ProtoMajor == 0
+	})
+
+...and finally, it is possible to combine several matchers in a single route:
+
+	r.HandleFunc("/products", ProductsHandler).
+	  Host("www.domain.com").
+	  Methods("GET").
+	  Schemes("http")
+
+Setting the same matching conditions again and again can be boring, so we have
+a way to group several routes that share the same requirements.
+We call it "subrouting".
+
+For example, let's say we have several URLs that should only match when the
+host is "www.domain.com". Create a route for that host and get a "subrouter"
+from it:
+
+	r := mux.NewRouter()
+	s := r.Host("www.domain.com").Subrouter()
+
+Then register routes in the subrouter:
+
+	s.HandleFunc("/products/", ProductsHandler)
+	s.HandleFunc("/products/{key}", ProductHandler)
+	s.HandleFunc("/articles/{category}/{id:[0-9]+}"), ArticleHandler)
+
+The three URL paths we registered above will only be tested if the domain is
+"www.domain.com", because the subrouter is tested first. This is not
+only convenient, but also optimizes request matching. You can create
+subrouters combining any attribute matchers accepted by a route.
+
+Subrouters can be used to create domain or path "namespaces": you define
+subrouters in a central place and then parts of the app can register its
+paths relatively to a given subrouter.
+
+There's one more thing about subroutes. When a subrouter has a path prefix,
+the inner routes use it as base for their paths:
+
+	r := mux.NewRouter()
+	s := r.PathPrefix("/products").Subrouter()
+	// "/products/"
+	s.HandleFunc("/", ProductsHandler)
+	// "/products/{key}/"
+	s.HandleFunc("/{key}/", ProductHandler)
+	// "/products/{key}/details"
+	s.HandleFunc("/{key}/details", ProductDetailsHandler)
+
+Now let's see how to build registered URLs.
+
+Routes can be named. All routes that define a name can have their URLs built,
+or "reversed". We define a name calling Name() on a route. For example:
+
+	r := mux.NewRouter()
+	r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).
+	  Name("article")
+
+To build a URL, get the route and call the URL() method, passing a sequence of
+key/value pairs for the route variables. For the previous route, we would do:
+
+	url, err := r.Get("article").URL("category", "technology", "id", "42")
+
+...and the result will be a url.URL with the following path:
+
+	"/articles/technology/42"
+
+This also works for host variables:
+
+	r := mux.NewRouter()
+	r.Host("{subdomain}.domain.com").
+	  Path("/articles/{category}/{id:[0-9]+}").
+	  HandlerFunc(ArticleHandler).
+	  Name("article")
+
+	// url.String() will be "http://news.domain.com/articles/technology/42"
+	url, err := r.Get("article").URL("subdomain", "news",
+	                                 "category", "technology",
+	                                 "id", "42")
+
+All variables defined in the route are required, and their values must
+conform to the corresponding patterns. These requirements guarantee that a
+generated URL will always match a registered route -- the only exception is
+for explicitly defined "build-only" routes which never match.
+
+Regex support also exists for matching Headers within a route. For example, we could do:
+
+	r.HeadersRegexp("Content-Type", "application/(text|json)")
+
+...and the route will match both requests with a Content-Type of `application/json` as well as
+`application/text`
+
+There's also a way to build only the URL host or path for a route:
+use the methods URLHost() or URLPath() instead. For the previous route,
+we would do:
+
+	// "http://news.domain.com/"
+	host, err := r.Get("article").URLHost("subdomain", "news")
+
+	// "/articles/technology/42"
+	path, err := r.Get("article").URLPath("category", "technology", "id", "42")
+
+And if you use subrouters, host and path defined separately can be built
+as well:
+
+	r := mux.NewRouter()
+	s := r.Host("{subdomain}.domain.com").Subrouter()
+	s.Path("/articles/{category}/{id:[0-9]+}").
+	  HandlerFunc(ArticleHandler).
+	  Name("article")
+
+	// "http://news.domain.com/articles/technology/42"
+	url, err := r.Get("article").URL("subdomain", "news",
+	                                 "category", "technology",
+	                                 "id", "42")
+*/
+package mux

vendor/github.com/gorilla/mux/mux.go

@@ -0,0 +1,469 @@
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package mux
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"path"
+	"regexp"
+
+	"github.com/gorilla/context"
+)
+
+// NewRouter returns a new router instance.
+func NewRouter() *Router {
+	return &Router{namedRoutes: make(map[string]*Route), KeepContext: false}
+}
+
+// Router registers routes to be matched and dispatches a handler.
+//
+// It implements the http.Handler interface, so it can be registered to serve
+// requests:
+//
+//     var router = mux.NewRouter()
+//
+//     func main() {
+//         http.Handle("/", router)
+//     }
+//
+// Or, for Google App Engine, register it in a init() function:
+//
+//     func init() {
+//         http.Handle("/", router)
+//     }
+//
+// This will send all incoming requests to the router.
+type Router struct {
+	// Configurable Handler to be used when no route matches.
+	NotFoundHandler http.Handler
+	// Parent route, if this is a subrouter.
+	parent parentRoute
+	// Routes to be matched, in order.
+	routes []*Route
+	// Routes by name for URL building.
+	namedRoutes map[string]*Route
+	// See Router.StrictSlash(). This defines the flag for new routes.
+	strictSlash bool
+	// If true, do not clear the request context after handling the request
+	KeepContext bool
+}
+
+// Match matches registered routes against the request.
+func (r *Router) Match(req *http.Request, match *RouteMatch) bool {
+	for _, route := range r.routes {
+		if route.Match(req, match) {
+			return true
+		}
+	}
+	return false
+}
+
+// ServeHTTP dispatches the handler registered in the matched route.
+//
+// When there is a match, the route variables can be retrieved calling
+// mux.Vars(request).
+func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+	// Clean path to canonical form and redirect.
+	if p := cleanPath(req.URL.Path); p != req.URL.Path {
+
+		// Added 3 lines (Philip Schlump) - It was droping the query string and #whatever from query.
+		// This matches with fix in go 1.2 r.c. 4 for same problem.  Go Issue:
+		// http://code.google.com/p/go/issues/detail?id=5252
+		url := *req.URL
+		url.Path = p
+		p = url.String()
+
+		w.Header().Set("Location", p)
+		w.WriteHeader(http.StatusMovedPermanently)
+		return
+	}
+	var match RouteMatch
+	var handler http.Handler
+	if r.Match(req, &match) {
+		handler = match.Handler
+		setVars(req, match.Vars)
+		setCurrentRoute(req, match.Route)
+	}
+	if handler == nil {
+		handler = r.NotFoundHandler
+		if handler == nil {
+			handler = http.NotFoundHandler()
+		}
+	}
+	if !r.KeepContext {
+		defer context.Clear(req)
+	}
+	handler.ServeHTTP(w, req)
+}
+
+// Get returns a route registered with the given name.
+func (r *Router) Get(name string) *Route {
+	return r.getNamedRoutes()[name]
+}
+
+// GetRoute returns a route registered with the given name. This method
+// was renamed to Get() and remains here for backwards compatibility.
+func (r *Router) GetRoute(name string) *Route {
+	return r.getNamedRoutes()[name]
+}
+
+// StrictSlash defines the trailing slash behavior for new routes. The initial
+// value is false.
+//
+// When true, if the route path is "/path/", accessing "/path" will redirect
+// to the former and vice versa. In other words, your application will always
+// see the path as specified in the route.
+//
+// When false, if the route path is "/path", accessing "/path/" will not match
+// this route and vice versa.
+//
+// Special case: when a route sets a path prefix using the PathPrefix() method,
+// strict slash is ignored for that route because the redirect behavior can't
+// be determined from a prefix alone. However, any subrouters created from that
+// route inherit the original StrictSlash setting.
+func (r *Router) StrictSlash(value bool) *Router {
+	r.strictSlash = value
+	return r
+}
+
+// ----------------------------------------------------------------------------
+// parentRoute
+// ----------------------------------------------------------------------------
+
+// getNamedRoutes returns the map where named routes are registered.
+func (r *Router) getNamedRoutes() map[string]*Route {
+	if r.namedRoutes == nil {
+		if r.parent != nil {
+			r.namedRoutes = r.parent.getNamedRoutes()
+		} else {
+			r.namedRoutes = make(map[string]*Route)
+		}
+	}
+	return r.namedRoutes
+}
+
+// getRegexpGroup returns regexp definitions from the parent route, if any.
+func (r *Router) getRegexpGroup() *routeRegexpGroup {
+	if r.parent != nil {
+		return r.parent.getRegexpGroup()
+	}
+	return nil
+}
+
+func (r *Router) buildVars(m map[string]string) map[string]string {
+	if r.parent != nil {
+		m = r.parent.buildVars(m)
+	}
+	return m
+}
+
+// ----------------------------------------------------------------------------
+// Route factories
+// ----------------------------------------------------------------------------
+
+// NewRoute registers an empty route.
+func (r *Router) NewRoute() *Route {
+	route := &Route{parent: r, strictSlash: r.strictSlash}
+	r.routes = append(r.routes, route)
+	return route
+}
+
+// Handle registers a new route with a matcher for the URL path.
+// See Route.Path() and Route.Handler().
+func (r *Router) Handle(path string, handler http.Handler) *Route {
+	return r.NewRoute().Path(path).Handler(handler)
+}
+
+// HandleFunc registers a new route with a matcher for the URL path.
+// See Route.Path() and Route.HandlerFunc().
+func (r *Router) HandleFunc(path string, f func(http.ResponseWriter,
+	*http.Request)) *Route {
+	return r.NewRoute().Path(path).HandlerFunc(f)
+}
+
+// Headers registers a new route with a matcher for request header values.
+// See Route.Headers().
+func (r *Router) Headers(pairs ...string) *Route {
+	return r.NewRoute().Headers(pairs...)
+}
+
+// Host registers a new route with a matcher for the URL host.
+// See Route.Host().
+func (r *Router) Host(tpl string) *Route {
+	return r.NewRoute().Host(tpl)
+}
+
+// MatcherFunc registers a new route with a custom matcher function.
+// See Route.MatcherFunc().
+func (r *Router) MatcherFunc(f MatcherFunc) *Route {
+	return r.NewRoute().MatcherFunc(f)
+}
+
+// Methods registers a new route with a matcher for HTTP methods.
+// See Route.Methods().
+func (r *Router) Methods(methods ...string) *Route {
+	return r.NewRoute().Methods(methods...)
+}
+
+// Path registers a new route with a matcher for the URL path.
+// See Route.Path().
+func (r *Router) Path(tpl string) *Route {
+	return r.NewRoute().Path(tpl)
+}
+
+// PathPrefix registers a new route with a matcher for the URL path prefix.
+// See Route.PathPrefix().
+func (r *Router) PathPrefix(tpl string) *Route {
+	return r.NewRoute().PathPrefix(tpl)
+}
+
+// Queries registers a new route with a matcher for URL query values.
+// See Route.Queries().
+func (r *Router) Queries(pairs ...string) *Route {
+	return r.NewRoute().Queries(pairs...)
+}
+
+// Schemes registers a new route with a matcher for URL schemes.
+// See Route.Schemes().
+func (r *Router) Schemes(schemes ...string) *Route {
+	return r.NewRoute().Schemes(schemes...)
+}
+
+// BuildVars registers a new route with a custom function for modifying
+// route variables before building a URL.
+func (r *Router) BuildVarsFunc(f BuildVarsFunc) *Route {
+	return r.NewRoute().BuildVarsFunc(f)
+}
+
+// Walk walks the router and all its sub-routers, calling walkFn for each route
+// in the tree. The routes are walked in the order they were added. Sub-routers
+// are explored depth-first.
+func (r *Router) Walk(walkFn WalkFunc) error {
+	return r.walk(walkFn, []*Route{})
+}
+
+// SkipRouter is used as a return value from WalkFuncs to indicate that the
+// router that walk is about to descend down to should be skipped.
+var SkipRouter = errors.New("skip this router")
+
+// WalkFunc is the type of the function called for each route visited by Walk.
+// At every invocation, it is given the current route, and the current router,
+// and a list of ancestor routes that lead to the current route.
+type WalkFunc func(route *Route, router *Router, ancestors []*Route) error
+
+func (r *Router) walk(walkFn WalkFunc, ancestors []*Route) error {
+	for _, t := range r.routes {
+		if t.regexp == nil || t.regexp.path == nil || t.regexp.path.template == "" {
+			continue
+		}
+
+		err := walkFn(t, r, ancestors)
+		if err == SkipRouter {
+			continue
+		}
+		for _, sr := range t.matchers {
+			if h, ok := sr.(*Router); ok {
+				err := h.walk(walkFn, ancestors)
+				if err != nil {
+					return err
+				}
+			}
+		}
+		if h, ok := t.handler.(*Router); ok {
+			ancestors = append(ancestors, t)
+			err := h.walk(walkFn, ancestors)
+			if err != nil {
+				return err
+			}
+			ancestors = ancestors[:len(ancestors)-1]
+		}
+	}
+	return nil
+}
+
+// ----------------------------------------------------------------------------
+// Context
+// ----------------------------------------------------------------------------
+
+// RouteMatch stores information about a matched route.
+type RouteMatch struct {
+	Route   *Route
+	Handler http.Handler
+	Vars    map[string]string
+}
+
+type contextKey int
+
+const (
+	varsKey contextKey = iota
+	routeKey
+)
+
+// Vars returns the route variables for the current request, if any.
+func Vars(r *http.Request) map[string]string {
+	if rv := context.Get(r, varsKey); rv != nil {
+		return rv.(map[string]string)
+	}
+	return nil
+}
+
+// CurrentRoute returns the matched route for the current request, if any.
+// This only works when called inside the handler of the matched route
+// because the matched route is stored in the request context which is cleared
+// after the handler returns, unless the KeepContext option is set on the
+// Router.
+func CurrentRoute(r *http.Request) *Route {
+	if rv := context.Get(r, routeKey); rv != nil {
+		return rv.(*Route)
+	}
+	return nil
+}
+
+func setVars(r *http.Request, val interface{}) {
+	context.Set(r, varsKey, val)
+}
+
+func setCurrentRoute(r *http.Request, val interface{}) {
+	context.Set(r, routeKey, val)
+}
+
+// ----------------------------------------------------------------------------
+// Helpers
+// ----------------------------------------------------------------------------
+
+// cleanPath returns the canonical path for p, eliminating . and .. elements.
+// Borrowed from the net/http package.
+func cleanPath(p string) string {
+	if p == "" {
+		return "/"
+	}
+	if p[0] != '/' {
+		p = "/" + p
+	}
+	np := path.Clean(p)
+	// path.Clean removes trailing slash except for root;
+	// put the trailing slash back if necessary.
+	if p[len(p)-1] == '/' && np != "/" {
+		np += "/"
+	}
+	return np
+}
+
+// uniqueVars returns an error if two slices contain duplicated strings.
+func uniqueVars(s1, s2 []string) error {
+	for _, v1 := range s1 {
+		for _, v2 := range s2 {
+			if v1 == v2 {
+				return fmt.Errorf("mux: duplicated route variable %q", v2)
+			}
+		}
+	}
+	return nil
+}
+
+func checkPairs(pairs ...string) (int, error) {
+	length := len(pairs)
+	if length%2 != 0 {
+		return length, fmt.Errorf(
+			"mux: number of parameters must be multiple of 2, got %v", pairs)
+	}
+	return length, nil
+}
+
+// mapFromPairs converts variadic string parameters to a string map.
+func mapFromPairsToString(pairs ...string) (map[string]string, error) {
+	length, err := checkPairs(pairs...)
+	if err != nil {
+		return nil, err
+	}
+	m := make(map[string]string, length/2)
+	for i := 0; i < length; i += 2 {
+		m[pairs[i]] = pairs[i+1]
+	}
+	return m, nil
+}
+
+func mapFromPairsToRegex(pairs ...string) (map[string]*regexp.Regexp, error) {
+	length, err := checkPairs(pairs...)
+	if err != nil {
+		return nil, err
+	}
+	m := make(map[string]*regexp.Regexp, length/2)
+	for i := 0; i < length; i += 2 {
+		regex, err := regexp.Compile(pairs[i+1])
+		if err != nil {
+			return nil, err
+		}
+		m[pairs[i]] = regex
+	}
+	return m, nil
+}
+
+// matchInArray returns true if the given string value is in the array.
+func matchInArray(arr []string, value string) bool {
+	for _, v := range arr {
+		if v == value {
+			return true
+		}
+	}
+	return false
+}
+
+// matchMapWithString returns true if the given key/value pairs exist in a given map.
+func matchMapWithString(toCheck map[string]string, toMatch map[string][]string, canonicalKey bool) bool {
+	for k, v := range toCheck {
+		// Check if key exists.
+		if canonicalKey {
+			k = http.CanonicalHeaderKey(k)
+		}
+		if values := toMatch[k]; values == nil {
+			return false
+		} else if v != "" {
+			// If value was defined as an empty string we only check that the
+			// key exists. Otherwise we also check for equality.
+			valueExists := false
+			for _, value := range values {
+				if v == value {
+					valueExists = true
+					break
+				}
+			}
+			if !valueExists {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+// matchMapWithRegex returns true if the given key/value pairs exist in a given map compiled against
+// the given regex
+func matchMapWithRegex(toCheck map[string]*regexp.Regexp, toMatch map[string][]string, canonicalKey bool) bool {
+	for k, v := range toCheck {
+		// Check if key exists.
+		if canonicalKey {
+			k = http.CanonicalHeaderKey(k)
+		}
+		if values := toMatch[k]; values == nil {
+			return false
+		} else if v != nil {
+			// If value was defined as an empty string we only check that the
+			// key exists. Otherwise we also check for equality.
+			valueExists := false
+			for _, value := range values {
+				if v.MatchString(value) {
+					valueExists = true
+					break
+				}
+			}
+			if !valueExists {
+				return false
+			}
+		}
+	}
+	return true
+}

vendor/github.com/gorilla/mux/old_test.go

@@ -0,0 +1,714 @@
+// Old tests ported to Go1. This is a mess. Want to drop it one day.
+
+// Copyright 2011 Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package mux
+
+import (
+	"bytes"
+	"net/http"
+	"testing"
+)
+
+// ----------------------------------------------------------------------------
+// ResponseRecorder
+// ----------------------------------------------------------------------------
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// ResponseRecorder is an implementation of http.ResponseWriter that
+// records its mutations for later inspection in tests.
+type ResponseRecorder struct {
+	Code      int           // the HTTP response code from WriteHeader
+	HeaderMap http.Header   // the HTTP response headers
+	Body      *bytes.Buffer // if non-nil, the bytes.Buffer to append written data to
+	Flushed   bool
+}
+
+// NewRecorder returns an initialized ResponseRecorder.
+func NewRecorder() *ResponseRecorder {
+	return &ResponseRecorder{
+		HeaderMap: make(http.Header),
+		Body:      new(bytes.Buffer),
+	}
+}
+
+// DefaultRemoteAddr is the default remote address to return in RemoteAddr if
+// an explicit DefaultRemoteAddr isn't set on ResponseRecorder.
+const DefaultRemoteAddr = "1.2.3.4"
+
+// Header returns the response headers.
+func (rw *ResponseRecorder) Header() http.Header {
+	return rw.HeaderMap
+}
+
+// Write always succeeds and writes to rw.Body, if not nil.
+func (rw *ResponseRecorder) Write(buf []byte) (int, error) {
+	if rw.Body != nil {
+		rw.Body.Write(buf)
+	}
+	if rw.Code == 0 {
+		rw.Code = http.StatusOK
+	}
+	return len(buf), nil
+}
+
+// WriteHeader sets rw.Code.
+func (rw *ResponseRecorder) WriteHeader(code int) {
+	rw.Code = code
+}
+
+// Flush sets rw.Flushed to true.
+func (rw *ResponseRecorder) Flush() {
+	rw.Flushed = true
+}
+
+// ----------------------------------------------------------------------------
+
+func TestRouteMatchers(t *testing.T) {
+	var scheme, host, path, query, method string
+	var headers map[string]string
+	var resultVars map[bool]map[string]string
+
+	router := NewRouter()
+	router.NewRoute().Host("{var1}.google.com").
+		Path("/{var2:[a-z]+}/{var3:[0-9]+}").
+		Queries("foo", "bar").
+		Methods("GET").
+		Schemes("https").
+		Headers("x-requested-with", "XMLHttpRequest")
+	router.NewRoute().Host("www.{var4}.com").
+		PathPrefix("/foo/{var5:[a-z]+}/{var6:[0-9]+}").
+		Queries("baz", "ding").
+		Methods("POST").
+		Schemes("http").
+		Headers("Content-Type", "application/json")
+
+	reset := func() {
+		// Everything match.
+		scheme = "https"
+		host = "www.google.com"
+		path = "/product/42"
+		query = "?foo=bar"
+		method = "GET"
+		headers = map[string]string{"X-Requested-With": "XMLHttpRequest"}
+		resultVars = map[bool]map[string]string{
+			true:  {"var1": "www", "var2": "product", "var3": "42"},
+			false: {},
+		}
+	}
+
+	reset2 := func() {
+		// Everything match.
+		scheme = "http"
+		host = "www.google.com"
+		path = "/foo/product/42/path/that/is/ignored"
+		query = "?baz=ding"
+		method = "POST"
+		headers = map[string]string{"Content-Type": "application/json"}
+		resultVars = map[bool]map[string]string{
+			true:  {"var4": "google", "var5": "product", "var6": "42"},
+			false: {},
+		}
+	}
+
+	match := func(shouldMatch bool) {
+		url := scheme + "://" + host + path + query
+		request, _ := http.NewRequest(method, url, nil)
+		for key, value := range headers {
+			request.Header.Add(key, value)
+		}
+
+		var routeMatch RouteMatch
+		matched := router.Match(request, &routeMatch)
+		if matched != shouldMatch {
+			// Need better messages. :)
+			if matched {
+				t.Errorf("Should match.")
+			} else {
+				t.Errorf("Should not match.")
+			}
+		}
+
+		if matched {
+			currentRoute := routeMatch.Route
+			if currentRoute == nil {
+				t.Errorf("Expected a current route.")
+			}
+			vars := routeMatch.Vars
+			expectedVars := resultVars[shouldMatch]
+			if len(vars) != len(expectedVars) {
+				t.Errorf("Expected vars: %v Got: %v.", expectedVars, vars)
+			}
+			for name, value := range vars {
+				if expectedVars[name] != value {
+					t.Errorf("Expected vars: %v Got: %v.", expectedVars, vars)
+				}
+			}
+		}
+	}
+
+	// 1st route --------------------------------------------------------------
+
+	// Everything match.
+	reset()
+	match(true)
+
+	// Scheme doesn't match.
+	reset()
+	scheme = "http"
+	match(false)
+
+	// Host doesn't match.
+	reset()
+	host = "www.mygoogle.com"
+	match(false)
+
+	// Path doesn't match.
+	reset()
+	path = "/product/notdigits"
+	match(false)
+
+	// Query doesn't match.
+	reset()
+	query = "?foo=baz"
+	match(false)
+
+	// Method doesn't match.
+	reset()
+	method = "POST"
+	match(false)
+
+	// Header doesn't match.
+	reset()
+	headers = map[string]string{}
+	match(false)
+
+	// Everything match, again.
+	reset()
+	match(true)
+
+	// 2nd route --------------------------------------------------------------
+
+	// Everything match.
+	reset2()
+	match(true)
+
+	// Scheme doesn't match.
+	reset2()
+	scheme = "https"
+	match(false)
+
+	// Host doesn't match.
+	reset2()
+	host = "sub.google.com"
+	match(false)
+
+	// Path doesn't match.
+	reset2()
+	path = "/bar/product/42"
+	match(false)
+
+	// Query doesn't match.
+	reset2()
+	query = "?foo=baz"
+	match(false)
+
+	// Method doesn't match.
+	reset2()
+	method = "GET"
+	match(false)
+
+	// Header doesn't match.
+	reset2()
+	headers = map[string]string{}
+	match(false)
+
+	// Everything match, again.
+	reset2()
+	match(true)
+}
+
+type headerMatcherTest struct {
+	matcher headerMatcher
+	headers map[string]string
+	result  bool
+}
+
+var headerMatcherTests = []headerMatcherTest{
+	{
+		matcher: headerMatcher(map[string]string{"x-requested-with": "XMLHttpRequest"}),
+		headers: map[string]string{"X-Requested-With": "XMLHttpRequest"},
+		result:  true,
+	},
+	{
+		matcher: headerMatcher(map[string]string{"x-requested-with": ""}),
+		headers: map[string]string{"X-Requested-With": "anything"},
+		result:  true,
+	},
+	{
+		matcher: headerMatcher(map[string]string{"x-requested-with": "XMLHttpRequest"}),
+		headers: map[string]string{},
+		result:  false,
+	},
+}
+
+type hostMatcherTest struct {
+	matcher *Route
+	url     string
+	vars    map[string]string
+	result  bool
+}
+
+var hostMatcherTests = []hostMatcherTest{
+	{
+		matcher: NewRouter().NewRoute().Host("{foo:[a-z][a-z][a-z]}.{bar:[a-z][a-z][a-z]}.{baz:[a-z][a-z][a-z]}"),
+		url:     "http://abc.def.ghi/",
+		vars:    map[string]string{"foo": "abc", "bar": "def", "baz": "ghi"},
+		result:  true,
+	},
+	{
+		matcher: NewRouter().NewRoute().Host("{foo:[a-z][a-z][a-z]}.{bar:[a-z][a-z][a-z]}.{baz:[a-z][a-z][a-z]}"),
+		url:     "http://a.b.c/",
+		vars:    map[string]string{"foo": "abc", "bar": "def", "baz": "ghi"},
+		result:  false,
+	},
+}
+
+type methodMatcherTest struct {
+	matcher methodMatcher
+	method  string
+	result  bool
+}
+
+var methodMatcherTests = []methodMatcherTest{
+	{
+		matcher: methodMatcher([]string{"GET", "POST", "PUT"}),
+		method:  "GET",
+		result:  true,
+	},
+	{
+		matcher: methodMatcher([]string{"GET", "POST", "PUT"}),
+		method:  "POST",
+		result:  true,
+	},
+	{
+		matcher: methodMatcher([]string{"GET", "POST", "PUT"}),
+		method:  "PUT",
+		result:  true,
+	},
+	{
+		matcher: methodMatcher([]string{"GET", "POST", "PUT"}),
+		method:  "DELETE",
+		result:  false,
+	},
+}
+
+type pathMatcherTest struct {
+	matcher *Route
+	url     string
+	vars    map[string]string
+	result  bool
+}
+
+var pathMatcherTests = []pathMatcherTest{
+	{
+		matcher: NewRouter().NewRoute().Path("/{foo:[0-9][0-9][0-9]}/{bar:[0-9][0-9][0-9]}/{baz:[0-9][0-9][0-9]}"),
+		url:     "http://localhost:8080/123/456/789",
+		vars:    map[string]string{"foo": "123", "bar": "456", "baz": "789"},
+		result:  true,
+	},
+	{
+		matcher: NewRouter().NewRoute().Path("/{foo:[0-9][0-9][0-9]}/{bar:[0-9][0-9][0-9]}/{baz:[0-9][0-9][0-9]}"),
+		url:     "http://localhost:8080/1/2/3",
+		vars:    map[string]string{"foo": "123", "bar": "456", "baz": "789"},
+		result:  false,
+	},
+}
+
+type schemeMatcherTest struct {
+	matcher schemeMatcher
+	url     string
+	result  bool
+}
+
+var schemeMatcherTests = []schemeMatcherTest{
+	{
+		matcher: schemeMatcher([]string{"http", "https"}),
+		url:     "http://localhost:8080/",
+		result:  true,
+	},
+	{
+		matcher: schemeMatcher([]string{"http", "https"}),
+		url:     "https://localhost:8080/",
+		result:  true,
+	},
+	{
+		matcher: schemeMatcher([]string{"https"}),
+		url:     "http://localhost:8080/",
+		result:  false,
+	},
+	{
+		matcher: schemeMatcher([]string{"http"}),
+		url:     "https://localhost:8080/",
+		result:  false,
+	},
+}
+
+type urlBuildingTest struct {
+	route *Route
+	vars  []string
+	url   string
+}
+
+var urlBuildingTests = []urlBuildingTest{
+	{
+		route: new(Route).Host("foo.domain.com"),
+		vars:  []string{},
+		url:   "http://foo.domain.com",
+	},
+	{
+		route: new(Route).Host("{subdomain}.domain.com"),
+		vars:  []string{"subdomain", "bar"},
+		url:   "http://bar.domain.com",
+	},
+	{
+		route: new(Route).Host("foo.domain.com").Path("/articles"),
+		vars:  []string{},
+		url:   "http://foo.domain.com/articles",
+	},
+	{
+		route: new(Route).Path("/articles"),
+		vars:  []string{},
+		url:   "/articles",
+	},
+	{
+		route: new(Route).Path("/articles/{category}/{id:[0-9]+}"),
+		vars:  []string{"category", "technology", "id", "42"},
+		url:   "/articles/technology/42",
+	},
+	{
+		route: new(Route).Host("{subdomain}.domain.com").Path("/articles/{category}/{id:[0-9]+}"),
+		vars:  []string{"subdomain", "foo", "category", "technology", "id", "42"},
+		url:   "http://foo.domain.com/articles/technology/42",
+	},
+}
+
+func TestHeaderMatcher(t *testing.T) {
+	for _, v := range headerMatcherTests {
+		request, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
+		for key, value := range v.headers {
+			request.Header.Add(key, value)
+		}
+		var routeMatch RouteMatch
+		result := v.matcher.Match(request, &routeMatch)
+		if result != v.result {
+			if v.result {
+				t.Errorf("%#v: should match %v.", v.matcher, request.Header)
+			} else {
+				t.Errorf("%#v: should not match %v.", v.matcher, request.Header)
+			}
+		}
+	}
+}
+
+func TestHostMatcher(t *testing.T) {
+	for _, v := range hostMatcherTests {
+		request, _ := http.NewRequest("GET", v.url, nil)
+		var routeMatch RouteMatch
+		result := v.matcher.Match(request, &routeMatch)
+		vars := routeMatch.Vars
+		if result != v.result {
+			if v.result {
+				t.Errorf("%#v: should match %v.", v.matcher, v.url)
+			} else {
+				t.Errorf("%#v: should not match %v.", v.matcher, v.url)
+			}
+		}
+		if result {
+			if len(vars) != len(v.vars) {
+				t.Errorf("%#v: vars length should be %v, got %v.", v.matcher, len(v.vars), len(vars))
+			}
+			for name, value := range vars {
+				if v.vars[name] != value {
+					t.Errorf("%#v: expected value %v for key %v, got %v.", v.matcher, v.vars[name], name, value)
+				}
+			}
+		} else {
+			if len(vars) != 0 {
+				t.Errorf("%#v: vars length should be 0, got %v.", v.matcher, len(vars))
+			}
+		}
+	}
+}
+
+func TestMethodMatcher(t *testing.T) {
+	for _, v := range methodMatcherTests {
+		request, _ := http.NewRequest(v.method, "http://localhost:8080/", nil)
+		var routeMatch RouteMatch
+		result := v.matcher.Match(request, &routeMatch)
+		if result != v.result {
+			if v.result {
+				t.Errorf("%#v: should match %v.", v.matcher, v.method)
+			} else {
+				t.Errorf("%#v: should not match %v.", v.matcher, v.method)
+			}
+		}
+	}
+}
+
+func TestPathMatcher(t *testing.T) {
+	for _, v := range pathMatcherTests {
+		request, _ := http.NewRequest("GET", v.url, nil)
+		var routeMatch RouteMatch
+		result := v.matcher.Match(request, &routeMatch)
+		vars := routeMatch.Vars
+		if result != v.result {
+			if v.result {
+				t.Errorf("%#v: should match %v.", v.matcher, v.url)
+			} else {
+				t.Errorf("%#v: should not match %v.", v.matcher, v.url)
+			}
+		}
+		if result {
+			if len(vars) != len(v.vars) {
+				t.Errorf("%#v: vars length should be %v, got %v.", v.matcher, len(v.vars), len(vars))
+			}
+			for name, value := range vars {
+				if v.vars[name] != value {
+					t.Errorf("%#v: expected value %v for key %v, got %v.", v.matcher, v.vars[name], name, value)
+				}
+			}
+		} else {
+			if len(vars) != 0 {
+				t.Errorf("%#v: vars length should be 0, got %v.", v.matcher, len(vars))
+			}
+		}
+	}
+}
+
+func TestSchemeMatcher(t *testing.T) {
+	for _, v := range schemeMatcherTests {
+		request, _ := http.NewRequest("GET", v.url, nil)
+		var routeMatch RouteMatch
+		result := v.matcher.Match(request, &routeMatch)
+		if result != v.result {
+			if v.result {
+				t.Errorf("%#v: should match %v.", v.matcher, v.url)
+			} else {
+				t.Errorf("%#v: should not match %v.", v.matcher, v.url)
+			}
+		}
+	}
+}
+
+func TestUrlBuilding(t *testing.T) {
+
+	for _, v := range urlBuildingTests {
+		u, _ := v.route.URL(v.vars...)
+		url := u.String()
+		if url != v.url {
+			t.Errorf("expected %v, got %v", v.url, url)
+			/*
+				reversePath := ""
+				reverseHost := ""
+				if v.route.pathTemplate != nil {
+						reversePath = v.route.pathTemplate.Reverse
+				}
+				if v.route.hostTemplate != nil {
+						reverseHost = v.route.hostTemplate.Reverse
+				}
+
+				t.Errorf("%#v:\nexpected: %q\ngot: %q\nreverse path: %q\nreverse host: %q", v.route, v.url, url, reversePath, reverseHost)
+			*/
+		}
+	}
+
+	ArticleHandler := func(w http.ResponseWriter, r *http.Request) {
+	}
+
+	router := NewRouter()
+	router.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).Name("article")
+
+	url, _ := router.Get("article").URL("category", "technology", "id", "42")
+	expected := "/articles/technology/42"
+	if url.String() != expected {
+		t.Errorf("Expected %v, got %v", expected, url.String())
+	}
+}
+
+func TestMatchedRouteName(t *testing.T) {
+	routeName := "stock"
+	router := NewRouter()
+	route := router.NewRoute().Path("/products/").Name(routeName)
+
+	url := "http://www.domain.com/products/"
+	request, _ := http.NewRequest("GET", url, nil)
+	var rv RouteMatch
+	ok := router.Match(request, &rv)
+
+	if !ok || rv.Route != route {
+		t.Errorf("Expected same route, got %+v.", rv.Route)
+	}
+
+	retName := rv.Route.GetName()
+	if retName != routeName {
+		t.Errorf("Expected %q, got %q.", routeName, retName)
+	}
+}
+
+func TestSubRouting(t *testing.T) {
+	// Example from docs.
+	router := NewRouter()
+	subrouter := router.NewRoute().Host("www.domain.com").Subrouter()
+	route := subrouter.NewRoute().Path("/products/").Name("products")
+
+	url := "http://www.domain.com/products/"
+	request, _ := http.NewRequest("GET", url, nil)
+	var rv RouteMatch
+	ok := router.Match(request, &rv)
+
+	if !ok || rv.Route != route {
+		t.Errorf("Expected same route, got %+v.", rv.Route)
+	}
+
+	u, _ := router.Get("products").URL()
+	builtUrl := u.String()
+	// Yay, subroute aware of the domain when building!
+	if builtUrl != url {
+		t.Errorf("Expected %q, got %q.", url, builtUrl)
+	}
+}
+
+func TestVariableNames(t *testing.T) {
+	route := new(Route).Host("{arg1}.domain.com").Path("/{arg1}/{arg2:[0-9]+}")
+	if route.err == nil {
+		t.Errorf("Expected error for duplicated variable names")
+	}
+}
+
+func TestRedirectSlash(t *testing.T) {
+	var route *Route
+	var routeMatch RouteMatch
+	r := NewRouter()
+
+	r.StrictSlash(false)
+	route = r.NewRoute()
+	if route.strictSlash != false {
+		t.Errorf("Expected false redirectSlash.")
+	}
+
+	r.StrictSlash(true)
+	route = r.NewRoute()
+	if route.strictSlash != true {
+		t.Errorf("Expected true redirectSlash.")
+	}
+
+	route = new(Route)
+	route.strictSlash = true
+	route.Path("/{arg1}/{arg2:[0-9]+}/")
+	request, _ := http.NewRequest("GET", "http://localhost/foo/123", nil)
+	routeMatch = RouteMatch{}
+	_ = route.Match(request, &routeMatch)
+	vars := routeMatch.Vars
+	if vars["arg1"] != "foo" {
+		t.Errorf("Expected foo.")
+	}
+	if vars["arg2"] != "123" {
+		t.Errorf("Expected 123.")
+	}
+	rsp := NewRecorder()
+	routeMatch.Handler.ServeHTTP(rsp, request)
+	if rsp.HeaderMap.Get("Location") != "http://localhost/foo/123/" {
+		t.Errorf("Expected redirect header.")
+	}
+
+	route = new(Route)
+	route.strictSlash = true
+	route.Path("/{arg1}/{arg2:[0-9]+}")
+	request, _ = http.NewRequest("GET", "http://localhost/foo/123/", nil)
+	routeMatch = RouteMatch{}
+	_ = route.Match(request, &routeMatch)
+	vars = routeMatch.Vars
+	if vars["arg1"] != "foo" {
+		t.Errorf("Expected foo.")
+	}
+	if vars["arg2"] != "123" {
+		t.Errorf("Expected 123.")
+	}
+	rsp = NewRecorder()
+	routeMatch.Handler.ServeHTTP(rsp, request)
+	if rsp.HeaderMap.Get("Location") != "http://localhost/foo/123" {
+		t.Errorf("Expected redirect header.")
+	}
+}
+
+// Test for the new regexp library, still not available in stable Go.
+func TestNewRegexp(t *testing.T) {
+	var p *routeRegexp
+	var matches []string
+
+	tests := map[string]map[string][]string{
+		"/{foo:a{2}}": {
+			"/a":    nil,
+			"/aa":   {"aa"},
+			"/aaa":  nil,
+			"/aaaa": nil,
+		},
+		"/{foo:a{2,}}": {
+			"/a":    nil,
+			"/aa":   {"aa"},
+			"/aaa":  {"aaa"},
+			"/aaaa": {"aaaa"},
+		},
+		"/{foo:a{2,3}}": {
+			"/a":    nil,
+			"/aa":   {"aa"},
+			"/aaa":  {"aaa"},
+			"/aaaa": nil,
+		},
+		"/{foo:[a-z]{3}}/{bar:[a-z]{2}}": {
+			"/a":       nil,
+			"/ab":      nil,
+			"/abc":     nil,
+			"/abcd":    nil,
+			"/abc/ab":  {"abc", "ab"},
+			"/abc/abc": nil,
+			"/abcd/ab": nil,
+		},
+		`/{foo:\w{3,}}/{bar:\d{2,}}`: {
+			"/a":        nil,
+			"/ab":       nil,
+			"/abc":      nil,
+			"/abc/1":    nil,
+			"/abc/12":   {"abc", "12"},
+			"/abcd/12":  {"abcd", "12"},
+			"/abcd/123": {"abcd", "123"},
+		},
+	}
+
+	for pattern, paths := range tests {
+		p, _ = newRouteRegexp(pattern, false, false, false, false)
+		for path, result := range paths {
+			matches = p.regexp.FindStringSubmatch(path)
+			if result == nil {
+				if matches != nil {
+					t.Errorf("%v should not match %v.", pattern, path)
+				}
+			} else {
+				if len(matches) != len(result)+1 {
+					t.Errorf("Expected %v matches, got %v.", len(result)+1, len(matches))
+				} else {
+					for k, v := range result {
+						if matches[k+1] != v {
+							t.Errorf("Expected %v, got %v.", v, matches[k+1])
+						}
+					}
+				}
+			}
+		}
+	}
+}

vendor/github.com/gorilla/mux/regexp.go

@@ -0,0 +1,317 @@
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package mux
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"net/url"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+// newRouteRegexp parses a route template and returns a routeRegexp,
+// used to match a host, a path or a query string.
+//
+// It will extract named variables, assemble a regexp to be matched, create
+// a "reverse" template to build URLs and compile regexps to validate variable
+// values used in URL building.
+//
+// Previously we accepted only Python-like identifiers for variable
+// names ([a-zA-Z_][a-zA-Z0-9_]*), but currently the only restriction is that
+// name and pattern can't be empty, and names can't contain a colon.
+func newRouteRegexp(tpl string, matchHost, matchPrefix, matchQuery, strictSlash bool) (*routeRegexp, error) {
+	// Check if it is well-formed.
+	idxs, errBraces := braceIndices(tpl)
+	if errBraces != nil {
+		return nil, errBraces
+	}
+	// Backup the original.
+	template := tpl
+	// Now let's parse it.
+	defaultPattern := "[^/]+"
+	if matchQuery {
+		defaultPattern = "[^?&]*"
+	} else if matchHost {
+		defaultPattern = "[^.]+"
+		matchPrefix = false
+	}
+	// Only match strict slash if not matching
+	if matchPrefix || matchHost || matchQuery {
+		strictSlash = false
+	}
+	// Set a flag for strictSlash.
+	endSlash := false
+	if strictSlash && strings.HasSuffix(tpl, "/") {
+		tpl = tpl[:len(tpl)-1]
+		endSlash = true
+	}
+	varsN := make([]string, len(idxs)/2)
+	varsR := make([]*regexp.Regexp, len(idxs)/2)
+	pattern := bytes.NewBufferString("")
+	pattern.WriteByte('^')
+	reverse := bytes.NewBufferString("")
+	var end int
+	var err error
+	for i := 0; i < len(idxs); i += 2 {
+		// Set all values we are interested in.
+		raw := tpl[end:idxs[i]]
+		end = idxs[i+1]
+		parts := strings.SplitN(tpl[idxs[i]+1:end-1], ":", 2)
+		name := parts[0]
+		patt := defaultPattern
+		if len(parts) == 2 {
+			patt = parts[1]
+		}
+		// Name or pattern can't be empty.
+		if name == "" || patt == "" {
+			return nil, fmt.Errorf("mux: missing name or pattern in %q",
+				tpl[idxs[i]:end])
+		}
+		// Build the regexp pattern.
+		varIdx := i / 2
+		fmt.Fprintf(pattern, "%s(?P<%s>%s)", regexp.QuoteMeta(raw), varGroupName(varIdx), patt)
+		// Build the reverse template.
+		fmt.Fprintf(reverse, "%s%%s", raw)
+
+		// Append variable name and compiled pattern.
+		varsN[varIdx] = name
+		varsR[varIdx], err = regexp.Compile(fmt.Sprintf("^%s$", patt))
+		if err != nil {
+			return nil, err
+		}
+	}
+	// Add the remaining.
+	raw := tpl[end:]
+	pattern.WriteString(regexp.QuoteMeta(raw))
+	if strictSlash {
+		pattern.WriteString("[/]?")
+	}
+	if matchQuery {
+		// Add the default pattern if the query value is empty
+		if queryVal := strings.SplitN(template, "=", 2)[1]; queryVal == "" {
+			pattern.WriteString(defaultPattern)
+		}
+	}
+	if !matchPrefix {
+		pattern.WriteByte('$')
+	}
+	reverse.WriteString(raw)
+	if endSlash {
+		reverse.WriteByte('/')
+	}
+	// Compile full regexp.
+	reg, errCompile := regexp.Compile(pattern.String())
+	if errCompile != nil {
+		return nil, errCompile
+	}
+	// Done!
+	return &routeRegexp{
+		template:    template,
+		matchHost:   matchHost,
+		matchQuery:  matchQuery,
+		strictSlash: strictSlash,
+		regexp:      reg,
+		reverse:     reverse.String(),
+		varsN:       varsN,
+		varsR:       varsR,
+	}, nil
+}
+
+// routeRegexp stores a regexp to match a host or path and information to
+// collect and validate route variables.
+type routeRegexp struct {
+	// The unmodified template.
+	template string
+	// True for host match, false for path or query string match.
+	matchHost bool
+	// True for query string match, false for path and host match.
+	matchQuery bool
+	// The strictSlash value defined on the route, but disabled if PathPrefix was used.
+	strictSlash bool
+	// Expanded regexp.
+	regexp *regexp.Regexp
+	// Reverse template.
+	reverse string
+	// Variable names.
+	varsN []string
+	// Variable regexps (validators).
+	varsR []*regexp.Regexp
+}
+
+// Match matches the regexp against the URL host or path.
+func (r *routeRegexp) Match(req *http.Request, match *RouteMatch) bool {
+	if !r.matchHost {
+		if r.matchQuery {
+			return r.matchQueryString(req)
+		} else {
+			return r.regexp.MatchString(req.URL.Path)
+		}
+	}
+	return r.regexp.MatchString(getHost(req))
+}
+
+// url builds a URL part using the given values.
+func (r *routeRegexp) url(values map[string]string) (string, error) {
+	urlValues := make([]interface{}, len(r.varsN))
+	for k, v := range r.varsN {
+		value, ok := values[v]
+		if !ok {
+			return "", fmt.Errorf("mux: missing route variable %q", v)
+		}
+		urlValues[k] = value
+	}
+	rv := fmt.Sprintf(r.reverse, urlValues...)
+	if !r.regexp.MatchString(rv) {
+		// The URL is checked against the full regexp, instead of checking
+		// individual variables. This is faster but to provide a good error
+		// message, we check individual regexps if the URL doesn't match.
+		for k, v := range r.varsN {
+			if !r.varsR[k].MatchString(values[v]) {
+				return "", fmt.Errorf(
+					"mux: variable %q doesn't match, expected %q", values[v],
+					r.varsR[k].String())
+			}
+		}
+	}
+	return rv, nil
+}
+
+// getUrlQuery returns a single query parameter from a request URL.
+// For a URL with foo=bar&baz=ding, we return only the relevant key
+// value pair for the routeRegexp.
+func (r *routeRegexp) getUrlQuery(req *http.Request) string {
+	if !r.matchQuery {
+		return ""
+	}
+	templateKey := strings.SplitN(r.template, "=", 2)[0]
+	for key, vals := range req.URL.Query() {
+		if key == templateKey && len(vals) > 0 {
+			return key + "=" + vals[0]
+		}
+	}
+	return ""
+}
+
+func (r *routeRegexp) matchQueryString(req *http.Request) bool {
+	return r.regexp.MatchString(r.getUrlQuery(req))
+}
+
+// braceIndices returns the first level curly brace indices from a string.
+// It returns an error in case of unbalanced braces.
+func braceIndices(s string) ([]int, error) {
+	var level, idx int
+	idxs := make([]int, 0)
+	for i := 0; i < len(s); i++ {
+		switch s[i] {
+		case '{':
+			if level++; level == 1 {
+				idx = i
+			}
+		case '}':
+			if level--; level == 0 {
+				idxs = append(idxs, idx, i+1)
+			} else if level < 0 {
+				return nil, fmt.Errorf("mux: unbalanced braces in %q", s)
+			}
+		}
+	}
+	if level != 0 {
+		return nil, fmt.Errorf("mux: unbalanced braces in %q", s)
+	}
+	return idxs, nil
+}
+
+// varGroupName builds a capturing group name for the indexed variable.
+func varGroupName(idx int) string {
+	return "v" + strconv.Itoa(idx)
+}
+
+// ----------------------------------------------------------------------------
+// routeRegexpGroup
+// ----------------------------------------------------------------------------
+
+// routeRegexpGroup groups the route matchers that carry variables.
+type routeRegexpGroup struct {
+	host    *routeRegexp
+	path    *routeRegexp
+	queries []*routeRegexp
+}
+
+// setMatch extracts the variables from the URL once a route matches.
+func (v *routeRegexpGroup) setMatch(req *http.Request, m *RouteMatch, r *Route) {
+	// Store host variables.
+	if v.host != nil {
+		hostVars := v.host.regexp.FindStringSubmatch(getHost(req))
+		if hostVars != nil {
+			subexpNames := v.host.regexp.SubexpNames()
+			varName := 0
+			for i, name := range subexpNames[1:] {
+				if name != "" && name == varGroupName(varName) {
+					m.Vars[v.host.varsN[varName]] = hostVars[i+1]
+					varName++
+				}
+			}
+		}
+	}
+	// Store path variables.
+	if v.path != nil {
+		pathVars := v.path.regexp.FindStringSubmatch(req.URL.Path)
+		if pathVars != nil {
+			subexpNames := v.path.regexp.SubexpNames()
+			varName := 0
+			for i, name := range subexpNames[1:] {
+				if name != "" && name == varGroupName(varName) {
+					m.Vars[v.path.varsN[varName]] = pathVars[i+1]
+					varName++
+				}
+			}
+			// Check if we should redirect.
+			if v.path.strictSlash {
+				p1 := strings.HasSuffix(req.URL.Path, "/")
+				p2 := strings.HasSuffix(v.path.template, "/")
+				if p1 != p2 {
+					u, _ := url.Parse(req.URL.String())
+					if p1 {
+						u.Path = u.Path[:len(u.Path)-1]
+					} else {
+						u.Path += "/"
+					}
+					m.Handler = http.RedirectHandler(u.String(), 301)
+				}
+			}
+		}
+	}
+	// Store query string variables.
+	for _, q := range v.queries {
+		queryVars := q.regexp.FindStringSubmatch(q.getUrlQuery(req))
+		if queryVars != nil {
+			subexpNames := q.regexp.SubexpNames()
+			varName := 0
+			for i, name := range subexpNames[1:] {
+				if name != "" && name == varGroupName(varName) {
+					m.Vars[q.varsN[varName]] = queryVars[i+1]
+					varName++
+				}
+			}
+		}
+	}
+}
+
+// getHost tries its best to return the request host.
+func getHost(r *http.Request) string {
+	if r.URL.IsAbs() {
+		return r.URL.Host
+	}
+	host := r.Host
+	// Slice off any port information.
+	if i := strings.Index(host, ":"); i != -1 {
+		host = host[:i]
+	}
+	return host
+
+}

vendor/github.com/gorilla/mux/route.go

@@ -0,0 +1,603 @@
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package mux
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+	"regexp"
+	"strings"
+)
+
+// Route stores information to match a request and build URLs.
+type Route struct {
+	// Parent where the route was registered (a Router).
+	parent parentRoute
+	// Request handler for the route.
+	handler http.Handler
+	// List of matchers.
+	matchers []matcher
+	// Manager for the variables from host and path.
+	regexp *routeRegexpGroup
+	// If true, when the path pattern is "/path/", accessing "/path" will
+	// redirect to the former and vice versa.
+	strictSlash bool
+	// If true, this route never matches: it is only used to build URLs.
+	buildOnly bool
+	// The name used to build URLs.
+	name string
+	// Error resulted from building a route.
+	err error
+
+	buildVarsFunc BuildVarsFunc
+}
+
+// Match matches the route against the request.
+func (r *Route) Match(req *http.Request, match *RouteMatch) bool {
+	if r.buildOnly || r.err != nil {
+		return false
+	}
+	// Match everything.
+	for _, m := range r.matchers {
+		if matched := m.Match(req, match); !matched {
+			return false
+		}
+	}
+	// Yay, we have a match. Let's collect some info about it.
+	if match.Route == nil {
+		match.Route = r
+	}
+	if match.Handler == nil {
+		match.Handler = r.handler
+	}
+	if match.Vars == nil {
+		match.Vars = make(map[string]string)
+	}
+	// Set variables.
+	if r.regexp != nil {
+		r.regexp.setMatch(req, match, r)
+	}
+	return true
+}
+
+// ----------------------------------------------------------------------------
+// Route attributes
+// ----------------------------------------------------------------------------
+
+// GetError returns an error resulted from building the route, if any.
+func (r *Route) GetError() error {
+	return r.err
+}
+
+// BuildOnly sets the route to never match: it is only used to build URLs.
+func (r *Route) BuildOnly() *Route {
+	r.buildOnly = true
+	return r
+}
+
+// Handler --------------------------------------------------------------------
+
+// Handler sets a handler for the route.
+func (r *Route) Handler(handler http.Handler) *Route {
+	if r.err == nil {
+		r.handler = handler
+	}
+	return r
+}
+
+// HandlerFunc sets a handler function for the route.
+func (r *Route) HandlerFunc(f func(http.ResponseWriter, *http.Request)) *Route {
+	return r.Handler(http.HandlerFunc(f))
+}
+
+// GetHandler returns the handler for the route, if any.
+func (r *Route) GetHandler() http.Handler {
+	return r.handler
+}
+
+// Name -----------------------------------------------------------------------
+
+// Name sets the name for the route, used to build URLs.
+// If the name was registered already it will be overwritten.
+func (r *Route) Name(name string) *Route {
+	if r.name != "" {
+		r.err = fmt.Errorf("mux: route already has name %q, can't set %q",
+			r.name, name)
+	}
+	if r.err == nil {
+		r.name = name
+		r.getNamedRoutes()[name] = r
+	}
+	return r
+}
+
+// GetName returns the name for the route, if any.
+func (r *Route) GetName() string {
+	return r.name
+}
+
+// ----------------------------------------------------------------------------
+// Matchers
+// ----------------------------------------------------------------------------
+
+// matcher types try to match a request.
+type matcher interface {
+	Match(*http.Request, *RouteMatch) bool
+}
+
+// addMatcher adds a matcher to the route.
+func (r *Route) addMatcher(m matcher) *Route {
+	if r.err == nil {
+		r.matchers = append(r.matchers, m)
+	}
+	return r
+}
+
+// addRegexpMatcher adds a host or path matcher and builder to a route.
+func (r *Route) addRegexpMatcher(tpl string, matchHost, matchPrefix, matchQuery bool) error {
+	if r.err != nil {
+		return r.err
+	}
+	r.regexp = r.getRegexpGroup()
+	if !matchHost && !matchQuery {
+		if len(tpl) == 0 || tpl[0] != '/' {
+			return fmt.Errorf("mux: path must start with a slash, got %q", tpl)
+		}
+		if r.regexp.path != nil {
+			tpl = strings.TrimRight(r.regexp.path.template, "/") + tpl
+		}
+	}
+	rr, err := newRouteRegexp(tpl, matchHost, matchPrefix, matchQuery, r.strictSlash)
+	if err != nil {
+		return err
+	}
+	for _, q := range r.regexp.queries {
+		if err = uniqueVars(rr.varsN, q.varsN); err != nil {
+			return err
+		}
+	}
+	if matchHost {
+		if r.regexp.path != nil {
+			if err = uniqueVars(rr.varsN, r.regexp.path.varsN); err != nil {
+				return err
+			}
+		}
+		r.regexp.host = rr
+	} else {
+		if r.regexp.host != nil {
+			if err = uniqueVars(rr.varsN, r.regexp.host.varsN); err != nil {
+				return err
+			}
+		}
+		if matchQuery {
+			r.regexp.queries = append(r.regexp.queries, rr)
+		} else {
+			r.regexp.path = rr
+		}
+	}
+	r.addMatcher(rr)
+	return nil
+}
+
+// Headers --------------------------------------------------------------------
+
+// headerMatcher matches the request against header values.
+type headerMatcher map[string]string
+
+func (m headerMatcher) Match(r *http.Request, match *RouteMatch) bool {
+	return matchMapWithString(m, r.Header, true)
+}
+
+// Headers adds a matcher for request header values.
+// It accepts a sequence of key/value pairs to be matched. For example:
+//
+//     r := mux.NewRouter()
+//     r.Headers("Content-Type", "application/json",
+//               "X-Requested-With", "XMLHttpRequest")
+//
+// The above route will only match if both request header values match.
+// Alternatively, you can provide a regular expression and match the header as follows:
+//
+//     r.Headers("Content-Type", "application/(text|json)",
+//               "X-Requested-With", "XMLHttpRequest")
+//
+// The above route will the same as the previous example, with the addition of matching
+// application/text as well.
+//
+// It the value is an empty string, it will match any value if the key is set.
+func (r *Route) Headers(pairs ...string) *Route {
+	if r.err == nil {
+		var headers map[string]string
+		headers, r.err = mapFromPairsToString(pairs...)
+		return r.addMatcher(headerMatcher(headers))
+	}
+	return r
+}
+
+// headerRegexMatcher matches the request against the route given a regex for the header
+type headerRegexMatcher map[string]*regexp.Regexp
+
+func (m headerRegexMatcher) Match(r *http.Request, match *RouteMatch) bool {
+	return matchMapWithRegex(m, r.Header, true)
+}
+
+// Regular expressions can be used with headers as well.
+// It accepts a sequence of key/value pairs, where the value has regex support. For example
+//     r := mux.NewRouter()
+//     r.HeadersRegexp("Content-Type", "application/(text|json)",
+//               "X-Requested-With", "XMLHttpRequest")
+//
+// The above route will only match if both the request header matches both regular expressions.
+// It the value is an empty string, it will match any value if the key is set.
+func (r *Route) HeadersRegexp(pairs ...string) *Route {
+	if r.err == nil {
+		var headers map[string]*regexp.Regexp
+		headers, r.err = mapFromPairsToRegex(pairs...)
+		return r.addMatcher(headerRegexMatcher(headers))
+	}
+	return r
+}
+
+// Host -----------------------------------------------------------------------
+
+// Host adds a matcher for the URL host.
+// It accepts a template with zero or more URL variables enclosed by {}.
+// Variables can define an optional regexp pattern to be matched:
+//
+// - {name} matches anything until the next dot.
+//
+// - {name:pattern} matches the given regexp pattern.
+//
+// For example:
+//
+//     r := mux.NewRouter()
+//     r.Host("www.domain.com")
+//     r.Host("{subdomain}.domain.com")
+//     r.Host("{subdomain:[a-z]+}.domain.com")
+//
+// Variable names must be unique in a given route. They can be retrieved
+// calling mux.Vars(request).
+func (r *Route) Host(tpl string) *Route {
+	r.err = r.addRegexpMatcher(tpl, true, false, false)
+	return r
+}
+
+// MatcherFunc ----------------------------------------------------------------
+
+// MatcherFunc is the function signature used by custom matchers.
+type MatcherFunc func(*http.Request, *RouteMatch) bool
+
+func (m MatcherFunc) Match(r *http.Request, match *RouteMatch) bool {
+	return m(r, match)
+}
+
+// MatcherFunc adds a custom function to be used as request matcher.
+func (r *Route) MatcherFunc(f MatcherFunc) *Route {
+	return r.addMatcher(f)
+}
+
+// Methods --------------------------------------------------------------------
+
+// methodMatcher matches the request against HTTP methods.
+type methodMatcher []string
+
+func (m methodMatcher) Match(r *http.Request, match *RouteMatch) bool {
+	return matchInArray(m, r.Method)
+}
+
+// Methods adds a matcher for HTTP methods.
+// It accepts a sequence of one or more methods to be matched, e.g.:
+// "GET", "POST", "PUT".
+func (r *Route) Methods(methods ...string) *Route {
+	for k, v := range methods {
+		methods[k] = strings.ToUpper(v)
+	}
+	return r.addMatcher(methodMatcher(methods))
+}
+
+// Path -----------------------------------------------------------------------
+
+// Path adds a matcher for the URL path.
+// It accepts a template with zero or more URL variables enclosed by {}. The
+// template must start with a "/".
+// Variables can define an optional regexp pattern to be matched:
+//
+// - {name} matches anything until the next slash.
+//
+// - {name:pattern} matches the given regexp pattern.
+//
+// For example:
+//
+//     r := mux.NewRouter()
+//     r.Path("/products/").Handler(ProductsHandler)
+//     r.Path("/products/{key}").Handler(ProductsHandler)
+//     r.Path("/articles/{category}/{id:[0-9]+}").
+//       Handler(ArticleHandler)
+//
+// Variable names must be unique in a given route. They can be retrieved
+// calling mux.Vars(request).
+func (r *Route) Path(tpl string) *Route {
+	r.err = r.addRegexpMatcher(tpl, false, false, false)
+	return r
+}
+
+// PathPrefix -----------------------------------------------------------------
+
+// PathPrefix adds a matcher for the URL path prefix. This matches if the given
+// template is a prefix of the full URL path. See Route.Path() for details on
+// the tpl argument.
+//
+// Note that it does not treat slashes specially ("/foobar/" will be matched by
+// the prefix "/foo") so you may want to use a trailing slash here.
+//
+// Also note that the setting of Router.StrictSlash() has no effect on routes
+// with a PathPrefix matcher.
+func (r *Route) PathPrefix(tpl string) *Route {
+	r.err = r.addRegexpMatcher(tpl, false, true, false)
+	return r
+}
+
+// Query ----------------------------------------------------------------------
+
+// Queries adds a matcher for URL query values.
+// It accepts a sequence of key/value pairs. Values may define variables.
+// For example:
+//
+//     r := mux.NewRouter()
+//     r.Queries("foo", "bar", "id", "{id:[0-9]+}")
+//
+// The above route will only match if the URL contains the defined queries
+// values, e.g.: ?foo=bar&id=42.
+//
+// It the value is an empty string, it will match any value if the key is set.
+//
+// Variables can define an optional regexp pattern to be matched:
+//
+// - {name} matches anything until the next slash.
+//
+// - {name:pattern} matches the given regexp pattern.
+func (r *Route) Queries(pairs ...string) *Route {
+	length := len(pairs)
+	if length%2 != 0 {
+		r.err = fmt.Errorf(
+			"mux: number of parameters must be multiple of 2, got %v", pairs)
+		return nil
+	}
+	for i := 0; i < length; i += 2 {
+		if r.err = r.addRegexpMatcher(pairs[i]+"="+pairs[i+1], false, false, true); r.err != nil {
+			return r
+		}
+	}
+
+	return r
+}
+
+// Schemes --------------------------------------------------------------------
+
+// schemeMatcher matches the request against URL schemes.
+type schemeMatcher []string
+
+func (m schemeMatcher) Match(r *http.Request, match *RouteMatch) bool {
+	return matchInArray(m, r.URL.Scheme)
+}
+
+// Schemes adds a matcher for URL schemes.
+// It accepts a sequence of schemes to be matched, e.g.: "http", "https".
+func (r *Route) Schemes(schemes ...string) *Route {
+	for k, v := range schemes {
+		schemes[k] = strings.ToLower(v)
+	}
+	return r.addMatcher(schemeMatcher(schemes))
+}
+
+// BuildVarsFunc --------------------------------------------------------------
+
+// BuildVarsFunc is the function signature used by custom build variable
+// functions (which can modify route variables before a route's URL is built).
+type BuildVarsFunc func(map[string]string) map[string]string
+
+// BuildVarsFunc adds a custom function to be used to modify build variables
+// before a route's URL is built.
+func (r *Route) BuildVarsFunc(f BuildVarsFunc) *Route {
+	r.buildVarsFunc = f
+	return r
+}
+
+// Subrouter ------------------------------------------------------------------
+
+// Subrouter creates a subrouter for the route.
+//
+// It will test the inner routes only if the parent route matched. For example:
+//
+//     r := mux.NewRouter()
+//     s := r.Host("www.domain.com").Subrouter()
+//     s.HandleFunc("/products/", ProductsHandler)
+//     s.HandleFunc("/products/{key}", ProductHandler)
+//     s.HandleFunc("/articles/{category}/{id:[0-9]+}"), ArticleHandler)
+//
+// Here, the routes registered in the subrouter won't be tested if the host
+// doesn't match.
+func (r *Route) Subrouter() *Router {
+	router := &Router{parent: r, strictSlash: r.strictSlash}
+	r.addMatcher(router)
+	return router
+}
+
+// ----------------------------------------------------------------------------
+// URL building
+// ----------------------------------------------------------------------------
+
+// URL builds a URL for the route.
+//
+// It accepts a sequence of key/value pairs for the route variables. For
+// example, given this route:
+//
+//     r := mux.NewRouter()
+//     r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).
+//       Name("article")
+//
+// ...a URL for it can be built using:
+//
+//     url, err := r.Get("article").URL("category", "technology", "id", "42")
+//
+// ...which will return an url.URL with the following path:
+//
+//     "/articles/technology/42"
+//
+// This also works for host variables:
+//
+//     r := mux.NewRouter()
+//     r.Host("{subdomain}.domain.com").
+//       HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).
+//       Name("article")
+//
+//     // url.String() will be "http://news.domain.com/articles/technology/42"
+//     url, err := r.Get("article").URL("subdomain", "news",
+//                                      "category", "technology",
+//                                      "id", "42")
+//
+// All variables defined in the route are required, and their values must
+// conform to the corresponding patterns.
+func (r *Route) URL(pairs ...string) (*url.URL, error) {
+	if r.err != nil {
+		return nil, r.err
+	}
+	if r.regexp == nil {
+		return nil, errors.New("mux: route doesn't have a host or path")
+	}
+	values, err := r.prepareVars(pairs...)
+	if err != nil {
+		return nil, err
+	}
+	var scheme, host, path string
+	if r.regexp.host != nil {
+		// Set a default scheme.
+		scheme = "http"
+		if host, err = r.regexp.host.url(values); err != nil {
+			return nil, err
+		}
+	}
+	if r.regexp.path != nil {
+		if path, err = r.regexp.path.url(values); err != nil {
+			return nil, err
+		}
+	}
+	return &url.URL{
+		Scheme: scheme,
+		Host:   host,
+		Path:   path,
+	}, nil
+}
+
+// URLHost builds the host part of the URL for a route. See Route.URL().
+//
+// The route must have a host defined.
+func (r *Route) URLHost(pairs ...string) (*url.URL, error) {
+	if r.err != nil {
+		return nil, r.err
+	}
+	if r.regexp == nil || r.regexp.host == nil {
+		return nil, errors.New("mux: route doesn't have a host")
+	}
+	values, err := r.prepareVars(pairs...)
+	if err != nil {
+		return nil, err
+	}
+	host, err := r.regexp.host.url(values)
+	if err != nil {
+		return nil, err
+	}
+	return &url.URL{
+		Scheme: "http",
+		Host:   host,
+	}, nil
+}
+
+// URLPath builds the path part of the URL for a route. See Route.URL().
+//
+// The route must have a path defined.
+func (r *Route) URLPath(pairs ...string) (*url.URL, error) {
+	if r.err != nil {
+		return nil, r.err
+	}
+	if r.regexp == nil || r.regexp.path == nil {
+		return nil, errors.New("mux: route doesn't have a path")
+	}
+	values, err := r.prepareVars(pairs...)
+	if err != nil {
+		return nil, err
+	}
+	path, err := r.regexp.path.url(values)
+	if err != nil {
+		return nil, err
+	}
+	return &url.URL{
+		Path: path,
+	}, nil
+}
+
+// prepareVars converts the route variable pairs into a map. If the route has a
+// BuildVarsFunc, it is invoked.
+func (r *Route) prepareVars(pairs ...string) (map[string]string, error) {
+	m, err := mapFromPairsToString(pairs...)
+	if err != nil {
+		return nil, err
+	}
+	return r.buildVars(m), nil
+}
+
+func (r *Route) buildVars(m map[string]string) map[string]string {
+	if r.parent != nil {
+		m = r.parent.buildVars(m)
+	}
+	if r.buildVarsFunc != nil {
+		m = r.buildVarsFunc(m)
+	}
+	return m
+}
+
+// ----------------------------------------------------------------------------
+// parentRoute
+// ----------------------------------------------------------------------------
+
+// parentRoute allows routes to know about parent host and path definitions.
+type parentRoute interface {
+	getNamedRoutes() map[string]*Route
+	getRegexpGroup() *routeRegexpGroup
+	buildVars(map[string]string) map[string]string
+}
+
+// getNamedRoutes returns the map where named routes are registered.
+func (r *Route) getNamedRoutes() map[string]*Route {
+	if r.parent == nil {
+		// During tests router is not always set.
+		r.parent = NewRouter()
+	}
+	return r.parent.getNamedRoutes()
+}
+
+// getRegexpGroup returns regexp definitions from this route.
+func (r *Route) getRegexpGroup() *routeRegexpGroup {
+	if r.regexp == nil {
+		if r.parent == nil {
+			// During tests router is not always set.
+			r.parent = NewRouter()
+		}
+		regexp := r.parent.getRegexpGroup()
+		if regexp == nil {
+			r.regexp = new(routeRegexpGroup)
+		} else {
+			// Copy.
+			r.regexp = &routeRegexpGroup{
+				host:    regexp.host,
+				path:    regexp.path,
+				queries: regexp.queries,
+			}
+		}
+	}
+	return r.regexp
+}

vendor/github.com/gorilla/rpc/v2/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2012 Rodrigo Moraes. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+	 * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+	 * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+	 * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/gorilla/rpc/v2/README.md

@@ -0,0 +1,6 @@
+rpc
+===
+
+gorilla/rpc is a foundation for RPC over HTTP services, providing access to the exported methods of an object through HTTP requests.
+
+Read the full documentation here: http://www.gorillatoolkit.org/pkg/rpc

vendor/github.com/gorilla/rpc/v2/compression_selector.go

@@ -0,0 +1,90 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package rpc
+
+import (
+	"compress/flate"
+	"compress/gzip"
+	"io"
+	"net/http"
+	"strings"
+	"unicode"
+)
+
+// gzipWriter writes and closes the gzip writer.
+type gzipWriter struct {
+	w *gzip.Writer
+}
+
+func (gw *gzipWriter) Write(p []byte) (n int, err error) {
+	defer gw.w.Close()
+	return gw.w.Write(p)
+}
+
+// gzipEncoder implements the gzip compressed http encoder.
+type gzipEncoder struct {
+}
+
+func (enc *gzipEncoder) Encode(w http.ResponseWriter) io.Writer {
+	w.Header().Set("Content-Encoding", "gzip")
+	return &gzipWriter{gzip.NewWriter(w)}
+}
+
+// flateWriter writes and closes the flate writer.
+type flateWriter struct {
+	w *flate.Writer
+}
+
+func (fw *flateWriter) Write(p []byte) (n int, err error) {
+	defer fw.w.Close()
+	return fw.w.Write(p)
+}
+
+// flateEncoder implements the flate compressed http encoder.
+type flateEncoder struct {
+}
+
+func (enc *flateEncoder) Encode(w http.ResponseWriter) io.Writer {
+	fw, err := flate.NewWriter(w, flate.DefaultCompression)
+	if err != nil {
+		return w
+	}
+	w.Header().Set("Content-Encoding", "deflate")
+	return &flateWriter{fw}
+}
+
+// CompressionSelector generates the compressed http encoder.
+type CompressionSelector struct {
+}
+
+// acceptedEnc returns the first compression type in "Accept-Encoding" header
+// field of the request.
+func acceptedEnc(req *http.Request) string {
+	encHeader := req.Header.Get("Accept-Encoding")
+	if encHeader == "" {
+		return ""
+	}
+	encTypes := strings.FieldsFunc(encHeader, func(r rune) bool {
+		return unicode.IsSpace(r) || r == ','
+	})
+	for _, enc := range encTypes {
+		if enc == "gzip" || enc == "deflate" {
+			return enc
+		}
+	}
+	return ""
+}
+
+// Select method selects the correct compression encoder based on http HEADER.
+func (_ *CompressionSelector) Select(r *http.Request) Encoder {
+	switch acceptedEnc(r) {
+	case "gzip":
+		return &gzipEncoder{}
+	case "flate":
+		return &flateEncoder{}
+	}
+	return DefaultEncoder
+}

vendor/github.com/gorilla/rpc/v2/doc.go

@@ -0,0 +1,81 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package gorilla/rpc is a foundation for RPC over HTTP services, providing
+access to the exported methods of an object through HTTP requests.
+
+This package derives from the standard net/rpc package but uses a single HTTP
+request per call instead of persistent connections. Other differences
+compared to net/rpc:
+
+	- Multiple codecs can be registered in the same server.
+	- A codec is chosen based on the "Content-Type" header from the request.
+	- Service methods also receive http.Request as parameter.
+	- This package can be used on Google App Engine.
+
+Let's setup a server and register a codec and service:
+
+	import (
+		"http"
+		"github.com/gorilla/rpc/v2"
+		"github.com/gorilla/rpc/v2/json"
+	)
+
+	func init() {
+		s := rpc.NewServer()
+		s.RegisterCodec(json.NewCodec(), "application/json")
+		s.RegisterService(new(HelloService), "")
+		http.Handle("/rpc", s)
+	}
+
+This server handles requests to the "/rpc" path using a JSON codec.
+A codec is tied to a content type. In the example above, the JSON codec is
+registered to serve requests with "application/json" as the value for the
+"Content-Type" header. If the header includes a charset definition, it is
+ignored; only the media-type part is taken into account.
+
+A service can be registered using a name. If the name is empty, like in the
+example above, it will be inferred from the service type.
+
+That's all about the server setup. Now let's define a simple service:
+
+	type HelloArgs struct {
+		Who string
+	}
+
+	type HelloReply struct {
+		Message string
+	}
+
+	type HelloService struct {}
+
+	func (h *HelloService) Say(r *http.Request, args *HelloArgs, reply *HelloReply) error {
+		reply.Message = "Hello, " + args.Who + "!"
+		return nil
+	}
+
+The example above defines a service with a method "HelloService.Say" and
+the arguments and reply related to that method.
+
+The service must be exported (begin with an upper case letter) or local
+(defined in the package registering the service).
+
+When a service is registered, the server inspects the service methods
+and make available the ones that follow these rules:
+
+	- The method name is exported.
+	- The method has three arguments: *http.Request, *args, *reply.
+	- All three arguments are pointers.
+	- The second and third arguments are exported or local.
+	- The method has return type error.
+
+All other methods are ignored.
+
+Gorilla has packages with common RPC codecs. Check out their documentation:
+
+	JSON: http://gorilla-web.appspot.com/pkg/rpc/json
+*/
+package rpc

vendor/github.com/gorilla/rpc/v2/encoder_selector.go

@@ -0,0 +1,43 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package rpc
+
+import (
+	"io"
+	"net/http"
+)
+
+// Encoder interface contains the encoder for http response.
+// Eg. gzip, flate compressions.
+type Encoder interface {
+	Encode(w http.ResponseWriter) io.Writer
+}
+
+type encoder struct {
+}
+
+func (_ *encoder) Encode(w http.ResponseWriter) io.Writer {
+	return w
+}
+
+var DefaultEncoder = &encoder{}
+
+// EncoderSelector interface provides a way to select encoder using the http
+// request. Typically people can use this to check HEADER of the request and
+// figure out client capabilities.
+// Eg. "Accept-Encoding" tells about supported compressions.
+type EncoderSelector interface {
+	Select(r *http.Request) Encoder
+}
+
+type encoderSelector struct {
+}
+
+func (_ *encoderSelector) Select(_ *http.Request) Encoder {
+	return DefaultEncoder
+}
+
+var DefaultEncoderSelector = &encoderSelector{}

vendor/github.com/gorilla/rpc/v2/json/client.go

@@ -0,0 +1,61 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012-2013 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"math/rand"
+)
+
+// ----------------------------------------------------------------------------
+// Request and Response
+// ----------------------------------------------------------------------------
+
+// clientRequest represents a JSON-RPC request sent by a client.
+type clientRequest struct {
+	// A String containing the name of the method to be invoked.
+	Method string `json:"method"`
+	// Object to pass as request parameter to the method.
+	Params [1]interface{} `json:"params"`
+	// The request id. This can be of any type. It is used to match the
+	// response with the request that it is replying to.
+	Id uint64 `json:"id"`
+}
+
+// clientResponse represents a JSON-RPC response returned to a client.
+type clientResponse struct {
+	Result *json.RawMessage `json:"result"`
+	Error  interface{}      `json:"error"`
+	Id     uint64           `json:"id"`
+}
+
+// EncodeClientRequest encodes parameters for a JSON-RPC client request.
+func EncodeClientRequest(method string, args interface{}) ([]byte, error) {
+	c := &clientRequest{
+		Method: method,
+		Params: [1]interface{}{args},
+		Id:     uint64(rand.Int63()),
+	}
+	return json.Marshal(c)
+}
+
+// DecodeClientResponse decodes the response body of a client request into
+// the interface reply.
+func DecodeClientResponse(r io.Reader, reply interface{}) error {
+	var c clientResponse
+	if err := json.NewDecoder(r).Decode(&c); err != nil {
+		return err
+	}
+	if c.Error != nil {
+		return &Error{Data: c.Error}
+	}
+	if c.Result == nil {
+		return fmt.Errorf("Unexpected null result")
+	}
+	return json.Unmarshal(*c.Result, reply)
+}

vendor/github.com/gorilla/rpc/v2/json/doc.go

@@ -0,0 +1,58 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package gorilla/rpc/json provides a codec for JSON-RPC over HTTP services.
+
+To register the codec in a RPC server:
+
+	import (
+		"http"
+		"github.com/gorilla/rpc/v2"
+		"github.com/gorilla/rpc/v2/json"
+	)
+
+	func init() {
+		s := rpc.NewServer()
+		s.RegisterCodec(json.NewCodec(), "application/json")
+		// [...]
+		http.Handle("/rpc", s)
+	}
+
+A codec is tied to a content type. In the example above, the server will use
+the JSON codec for requests with "application/json" as the value for the
+"Content-Type" header.
+
+This package follows the JSON-RPC 1.0 specification:
+
+	http://json-rpc.org/wiki/specification
+
+Request format is:
+
+	method:
+		The name of the method to be invoked, as a string in dotted notation
+		as in "Service.Method".
+	params:
+		An array with a single object to pass as argument to the method.
+	id:
+		The request id, a uint. It is used to match the response with the
+		request that it is replying to.
+
+Response format is:
+
+	result:
+		The Object that was returned by the invoked method,
+		or null in case there was an error invoking the method.
+	error:
+		An Error object if there was an error invoking the method,
+		or null if there was no error.
+	id:
+		The same id as the request it is responding to.
+
+Check the gorilla/rpc documentation for more details:
+
+	http://gorilla-web.appspot.com/pkg/rpc
+*/
+package json

vendor/github.com/gorilla/rpc/v2/json/json_test.go

@@ -0,0 +1,132 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"reflect"
+	"testing"
+
+	"github.com/gorilla/rpc/v2"
+)
+
+var (
+	ErrResponseError     = errors.New("response error")
+	ErrResponseJsonError = &Error{Data: map[string]interface{}{
+		"stackstrace": map[string]interface{}{"0": "foo()"},
+		"error":       "a message",
+	}}
+)
+
+type Service1Request struct {
+	A int
+	B int
+}
+
+type Service1Response struct {
+	Result int
+}
+
+type Service1 struct {
+}
+
+func (t *Service1) Multiply(r *http.Request, req *Service1Request, res *Service1Response) error {
+	res.Result = req.A * req.B
+	return nil
+}
+
+func (t *Service1) ResponseError(r *http.Request, req *Service1Request, res *Service1Response) error {
+	return ErrResponseError
+}
+
+func (t *Service1) ResponseJsonError(r *http.Request, req *Service1Request, res *Service1Response) error {
+	return ErrResponseJsonError
+}
+
+func execute(t *testing.T, s *rpc.Server, method string, req, res interface{}) error {
+	if !s.HasMethod(method) {
+		t.Fatal("Expected to be registered:", method)
+	}
+
+	buf, _ := EncodeClientRequest(method, req)
+	body := bytes.NewBuffer(buf)
+	r, _ := http.NewRequest("POST", "http://localhost:8080/", body)
+	r.Header.Set("Content-Type", "application/json")
+
+	w := httptest.NewRecorder()
+	s.ServeHTTP(w, r)
+
+	return DecodeClientResponse(w.Body, res)
+}
+
+func executeRaw(t *testing.T, s *rpc.Server, req json.RawMessage) (int, *bytes.Buffer) {
+	r, _ := http.NewRequest("POST", "http://localhost:8080/", bytes.NewBuffer(req))
+	r.Header.Set("Content-Type", "application/json")
+
+	w := httptest.NewRecorder()
+	s.ServeHTTP(w, r)
+
+	return w.Code, w.Body
+}
+
+func field(name string, blob json.RawMessage) (v interface{}, ok bool) {
+	var obj map[string]interface{}
+	if err := json.Unmarshal(blob, &obj); err != nil {
+		return nil, false
+	}
+	v, ok = obj[name]
+	return
+}
+
+func TestService(t *testing.T) {
+	s := rpc.NewServer()
+	s.RegisterCodec(NewCodec(), "application/json")
+	s.RegisterService(new(Service1), "")
+
+	var res Service1Response
+	if err := execute(t, s, "Service1.Multiply", &Service1Request{4, 2}, &res); err != nil {
+		t.Error("Expected err to be nil, but got", err)
+	}
+	if res.Result != 8 {
+		t.Error("Expected res.Result to be 8, but got", res.Result)
+	}
+	if err := execute(t, s, "Service1.ResponseError", &Service1Request{4, 2}, &res); err == nil {
+		t.Errorf("Expected to get %q, but got nil", ErrResponseError)
+	} else if err.Error() != ErrResponseError.Error() {
+		t.Errorf("Expected to get %q, but got %q", ErrResponseError, err)
+	}
+	if code, res := executeRaw(t, s, json.RawMessage(`{"method":"Service1.Multiply","params":null,"id":5}`)); code != 400 {
+		t.Error("Expected response code to be 400, but got", code)
+	} else if v, ok := field("result", res.Bytes()); !ok || v != nil {
+		t.Errorf("Expected ok to be true and v to be nil, but got %v and %v", ok, v)
+	}
+	if err := execute(t, s, "Service1.ResponseJsonError", &Service1Request{4, 2}, &res); err == nil {
+		t.Errorf("Expected to get %q, but got nil", ErrResponseError)
+	} else if jsonErr, ok := err.(*Error); !ok {
+		t.Error("Expected err to be of a *json.Error type")
+	} else if !reflect.DeepEqual(jsonErr.Data, ErrResponseJsonError.Data) {
+		t.Errorf("Expected jsonErr to be %q, but got %q", ErrResponseJsonError, jsonErr)
+	}
+}
+
+func TestClientNullResult(t *testing.T) {
+	data := `{"jsonrpc": "2.0", "id": 8674665223082153551, "result": null}`
+	reader := bytes.NewReader([]byte(data))
+
+	var reply interface{}
+
+	err := DecodeClientResponse(reader, &reply)
+	if err == nil {
+		t.Fatal(err)
+	}
+	if err.Error() != "Unexpected null result" {
+		t.Fatalf("Unexpected error: %s", err)
+	}
+}

vendor/github.com/gorilla/rpc/v2/json/server.go

@@ -0,0 +1,155 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package json
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+
+	"github.com/gorilla/rpc/v2"
+)
+
+var null = json.RawMessage([]byte("null"))
+
+// An Error is a wrapper for a JSON interface value. It can be used by either
+// a service's handler func to write more complex JSON data to an error field
+// of a server's response, or by a client to read it.
+type Error struct {
+	Data interface{}
+}
+
+func (e *Error) Error() string {
+	return fmt.Sprintf("%v", e.Data)
+}
+
+// ----------------------------------------------------------------------------
+// Request and Response
+// ----------------------------------------------------------------------------
+
+// serverRequest represents a JSON-RPC request received by the server.
+type serverRequest struct {
+	// A String containing the name of the method to be invoked.
+	Method string `json:"method"`
+	// An Array of objects to pass as arguments to the method.
+	Params *json.RawMessage `json:"params"`
+	// The request id. This can be of any type. It is used to match the
+	// response with the request that it is replying to.
+	Id *json.RawMessage `json:"id"`
+}
+
+// serverResponse represents a JSON-RPC response returned by the server.
+type serverResponse struct {
+	// The Object that was returned by the invoked method. This must be null
+	// in case there was an error invoking the method.
+	Result interface{} `json:"result"`
+	// An Error object if there was an error invoking the method. It must be
+	// null if there was no error.
+	Error interface{} `json:"error"`
+	// This must be the same id as the request it is responding to.
+	Id *json.RawMessage `json:"id"`
+}
+
+// ----------------------------------------------------------------------------
+// Codec
+// ----------------------------------------------------------------------------
+
+// NewCodec returns a new JSON Codec.
+func NewCodec() *Codec {
+	return &Codec{}
+}
+
+// Codec creates a CodecRequest to process each request.
+type Codec struct {
+}
+
+// NewRequest returns a CodecRequest.
+func (c *Codec) NewRequest(r *http.Request) rpc.CodecRequest {
+	return newCodecRequest(r)
+}
+
+// ----------------------------------------------------------------------------
+// CodecRequest
+// ----------------------------------------------------------------------------
+
+// newCodecRequest returns a new CodecRequest.
+func newCodecRequest(r *http.Request) rpc.CodecRequest {
+	// Decode the request body and check if RPC method is valid.
+	req := new(serverRequest)
+	err := json.NewDecoder(r.Body).Decode(req)
+	r.Body.Close()
+	return &CodecRequest{request: req, err: err}
+}
+
+// CodecRequest decodes and encodes a single request.
+type CodecRequest struct {
+	request *serverRequest
+	err     error
+}
+
+// Method returns the RPC method for the current request.
+//
+// The method uses a dotted notation as in "Service.Method".
+func (c *CodecRequest) Method() (string, error) {
+	if c.err == nil {
+		return c.request.Method, nil
+	}
+	return "", c.err
+}
+
+// ReadRequest fills the request object for the RPC method.
+func (c *CodecRequest) ReadRequest(args interface{}) error {
+	if c.err == nil {
+		if c.request.Params != nil {
+			// JSON params is array value. RPC params is struct.
+			// Unmarshal into array containing the request struct.
+			params := [1]interface{}{args}
+			c.err = json.Unmarshal(*c.request.Params, &params)
+		} else {
+			c.err = errors.New("rpc: method request ill-formed: missing params field")
+		}
+	}
+	return c.err
+}
+
+// WriteResponse encodes the response and writes it to the ResponseWriter.
+func (c *CodecRequest) WriteResponse(w http.ResponseWriter, reply interface{}) {
+	if c.request.Id != nil {
+		// Id is null for notifications and they don't have a response.
+		res := &serverResponse{
+			Result: reply,
+			Error:  &null,
+			Id:     c.request.Id,
+		}
+		c.writeServerResponse(w, 200, res)
+	}
+}
+
+func (c *CodecRequest) WriteError(w http.ResponseWriter, _ int, err error) {
+	res := &serverResponse{
+		Result: &null,
+		Id:     c.request.Id,
+	}
+	if jsonErr, ok := err.(*Error); ok {
+		res.Error = jsonErr.Data
+	} else {
+		res.Error = err.Error()
+	}
+	c.writeServerResponse(w, 400, res)
+}
+
+func (c *CodecRequest) writeServerResponse(w http.ResponseWriter, status int, res *serverResponse) {
+	b, err := json.Marshal(res)
+	if err == nil {
+		w.WriteHeader(status)
+		w.Header().Set("Content-Type", "application/json; charset=utf-8")
+		w.Write(b)
+	} else {
+		// Not sure in which case will this happen. But seems harmless.
+		rpc.WriteError(w, 400, err.Error())
+	}
+}

vendor/github.com/gorilla/rpc/v2/map.go

@@ -0,0 +1,164 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package rpc
+
+import (
+	"fmt"
+	"net/http"
+	"reflect"
+	"strings"
+	"sync"
+	"unicode"
+	"unicode/utf8"
+)
+
+var (
+	// Precompute the reflect.Type of error and http.Request
+	typeOfError   = reflect.TypeOf((*error)(nil)).Elem()
+	typeOfRequest = reflect.TypeOf((*http.Request)(nil)).Elem()
+)
+
+// ----------------------------------------------------------------------------
+// service
+// ----------------------------------------------------------------------------
+
+type service struct {
+	name     string                    // name of service
+	rcvr     reflect.Value             // receiver of methods for the service
+	rcvrType reflect.Type              // type of the receiver
+	methods  map[string]*serviceMethod // registered methods
+}
+
+type serviceMethod struct {
+	method    reflect.Method // receiver method
+	argsType  reflect.Type   // type of the request argument
+	replyType reflect.Type   // type of the response argument
+}
+
+// ----------------------------------------------------------------------------
+// serviceMap
+// ----------------------------------------------------------------------------
+
+// serviceMap is a registry for services.
+type serviceMap struct {
+	mutex    sync.Mutex
+	services map[string]*service
+}
+
+// register adds a new service using reflection to extract its methods.
+func (m *serviceMap) register(rcvr interface{}, name string) error {
+	// Setup service.
+	s := &service{
+		name:     name,
+		rcvr:     reflect.ValueOf(rcvr),
+		rcvrType: reflect.TypeOf(rcvr),
+		methods:  make(map[string]*serviceMethod),
+	}
+	if name == "" {
+		s.name = reflect.Indirect(s.rcvr).Type().Name()
+		if !isExported(s.name) {
+			return fmt.Errorf("rpc: type %q is not exported", s.name)
+		}
+	}
+	if s.name == "" {
+		return fmt.Errorf("rpc: no service name for type %q",
+			s.rcvrType.String())
+	}
+	// Setup methods.
+	for i := 0; i < s.rcvrType.NumMethod(); i++ {
+		method := s.rcvrType.Method(i)
+		mtype := method.Type
+		// Method must be exported.
+		if method.PkgPath != "" {
+			continue
+		}
+		// Method needs four ins: receiver, *http.Request, *args, *reply.
+		if mtype.NumIn() != 4 {
+			continue
+		}
+		// First argument must be a pointer and must be http.Request.
+		reqType := mtype.In(1)
+		if reqType.Kind() != reflect.Ptr || reqType.Elem() != typeOfRequest {
+			continue
+		}
+		// Second argument must be a pointer and must be exported.
+		args := mtype.In(2)
+		if args.Kind() != reflect.Ptr || !isExportedOrBuiltin(args) {
+			continue
+		}
+		// Third argument must be a pointer and must be exported.
+		reply := mtype.In(3)
+		if reply.Kind() != reflect.Ptr || !isExportedOrBuiltin(reply) {
+			continue
+		}
+		// Method needs one out: error.
+		if mtype.NumOut() != 1 {
+			continue
+		}
+		if returnType := mtype.Out(0); returnType != typeOfError {
+			continue
+		}
+		s.methods[method.Name] = &serviceMethod{
+			method:    method,
+			argsType:  args.Elem(),
+			replyType: reply.Elem(),
+		}
+	}
+	if len(s.methods) == 0 {
+		return fmt.Errorf("rpc: %q has no exported methods of suitable type",
+			s.name)
+	}
+	// Add to the map.
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+	if m.services == nil {
+		m.services = make(map[string]*service)
+	} else if _, ok := m.services[s.name]; ok {
+		return fmt.Errorf("rpc: service already defined: %q", s.name)
+	}
+	m.services[s.name] = s
+	return nil
+}
+
+// get returns a registered service given a method name.
+//
+// The method name uses a dotted notation as in "Service.Method".
+func (m *serviceMap) get(method string) (*service, *serviceMethod, error) {
+	parts := strings.Split(method, ".")
+	if len(parts) != 2 {
+		err := fmt.Errorf("rpc: service/method request ill-formed: %q", method)
+		return nil, nil, err
+	}
+	m.mutex.Lock()
+	service := m.services[parts[0]]
+	m.mutex.Unlock()
+	if service == nil {
+		err := fmt.Errorf("rpc: can't find service %q", method)
+		return nil, nil, err
+	}
+	serviceMethod := service.methods[parts[1]]
+	if serviceMethod == nil {
+		err := fmt.Errorf("rpc: can't find method %q", method)
+		return nil, nil, err
+	}
+	return service, serviceMethod, nil
+}
+
+// isExported returns true of a string is an exported (upper case) name.
+func isExported(name string) bool {
+	rune, _ := utf8.DecodeRuneInString(name)
+	return unicode.IsUpper(rune)
+}
+
+// isExportedOrBuiltin returns true if a type is exported or a builtin.
+func isExportedOrBuiltin(t reflect.Type) bool {
+	for t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+	// PkgPath will be non-empty even for an exported type,
+	// so we need to check the type name as well.
+	return isExported(t.Name()) || t.PkgPath() == ""
+}

vendor/github.com/gorilla/rpc/v2/server.go

@@ -0,0 +1,158 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package rpc
+
+import (
+	"fmt"
+	"net/http"
+	"reflect"
+	"strings"
+)
+
+// ----------------------------------------------------------------------------
+// Codec
+// ----------------------------------------------------------------------------
+
+// Codec creates a CodecRequest to process each request.
+type Codec interface {
+	NewRequest(*http.Request) CodecRequest
+}
+
+// CodecRequest decodes a request and encodes a response using a specific
+// serialization scheme.
+type CodecRequest interface {
+	// Reads the request and returns the RPC method name.
+	Method() (string, error)
+	// Reads the request filling the RPC method args.
+	ReadRequest(interface{}) error
+	// Writes the response using the RPC method reply.
+	WriteResponse(http.ResponseWriter, interface{})
+	// Writes an error produced by the server.
+	WriteError(w http.ResponseWriter, status int, err error)
+}
+
+// ----------------------------------------------------------------------------
+// Server
+// ----------------------------------------------------------------------------
+
+// NewServer returns a new RPC server.
+func NewServer() *Server {
+	return &Server{
+		codecs:   make(map[string]Codec),
+		services: new(serviceMap),
+	}
+}
+
+// Server serves registered RPC services using registered codecs.
+type Server struct {
+	codecs   map[string]Codec
+	services *serviceMap
+}
+
+// RegisterCodec adds a new codec to the server.
+//
+// Codecs are defined to process a given serialization scheme, e.g., JSON or
+// XML. A codec is chosen based on the "Content-Type" header from the request,
+// excluding the charset definition.
+func (s *Server) RegisterCodec(codec Codec, contentType string) {
+	s.codecs[strings.ToLower(contentType)] = codec
+}
+
+// RegisterService adds a new service to the server.
+//
+// The name parameter is optional: if empty it will be inferred from
+// the receiver type name.
+//
+// Methods from the receiver will be extracted if these rules are satisfied:
+//
+//    - The receiver is exported (begins with an upper case letter) or local
+//      (defined in the package registering the service).
+//    - The method name is exported.
+//    - The method has three arguments: *http.Request, *args, *reply.
+//    - All three arguments are pointers.
+//    - The second and third arguments are exported or local.
+//    - The method has return type error.
+//
+// All other methods are ignored.
+func (s *Server) RegisterService(receiver interface{}, name string) error {
+	return s.services.register(receiver, name)
+}
+
+// HasMethod returns true if the given method is registered.
+//
+// The method uses a dotted notation as in "Service.Method".
+func (s *Server) HasMethod(method string) bool {
+	if _, _, err := s.services.get(method); err == nil {
+		return true
+	}
+	return false
+}
+
+// ServeHTTP
+func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "POST" {
+		WriteError(w, 405, "rpc: POST method required, received "+r.Method)
+		return
+	}
+	contentType := r.Header.Get("Content-Type")
+	idx := strings.Index(contentType, ";")
+	if idx != -1 {
+		contentType = contentType[:idx]
+	}
+	codec := s.codecs[strings.ToLower(contentType)]
+	if codec == nil {
+		WriteError(w, 415, "rpc: unrecognized Content-Type: "+contentType)
+		return
+	}
+	// Create a new codec request.
+	codecReq := codec.NewRequest(r)
+	// Get service method to be called.
+	method, errMethod := codecReq.Method()
+	if errMethod != nil {
+		codecReq.WriteError(w, 400, errMethod)
+		return
+	}
+	serviceSpec, methodSpec, errGet := s.services.get(method)
+	if errGet != nil {
+		codecReq.WriteError(w, 400, errGet)
+		return
+	}
+	// Decode the args.
+	args := reflect.New(methodSpec.argsType)
+	if errRead := codecReq.ReadRequest(args.Interface()); errRead != nil {
+		codecReq.WriteError(w, 400, errRead)
+		return
+	}
+	// Call the service method.
+	reply := reflect.New(methodSpec.replyType)
+	errValue := methodSpec.method.Func.Call([]reflect.Value{
+		serviceSpec.rcvr,
+		reflect.ValueOf(r),
+		args,
+		reply,
+	})
+	// Cast the result to error if needed.
+	var errResult error
+	errInter := errValue[0].Interface()
+	if errInter != nil {
+		errResult = errInter.(error)
+	}
+	// Prevents Internet Explorer from MIME-sniffing a response away
+	// from the declared content-type
+	w.Header().Set("x-content-type-options", "nosniff")
+	// Encode the response.
+	if errResult == nil {
+		codecReq.WriteResponse(w, reply.Interface())
+	} else {
+		codecReq.WriteError(w, 400, errResult)
+	}
+}
+
+func WriteError(w http.ResponseWriter, status int, msg string) {
+	w.WriteHeader(status)
+	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+	fmt.Fprint(w, msg)
+}

vendor/github.com/gorilla/rpc/v2/server_test.go

@@ -0,0 +1,54 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Copyright 2012 The Gorilla Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package rpc
+
+import (
+	"net/http"
+	"testing"
+)
+
+type Service1Request struct {
+	A int
+	B int
+}
+
+type Service1Response struct {
+	Result int
+}
+
+type Service1 struct {
+}
+
+func (t *Service1) Multiply(r *http.Request, req *Service1Request, res *Service1Response) error {
+	res.Result = req.A * req.B
+	return nil
+}
+
+type Service2 struct {
+}
+
+func TestRegisterService(t *testing.T) {
+	var err error
+	s := NewServer()
+	service1 := new(Service1)
+	service2 := new(Service2)
+
+	// Inferred name.
+	err = s.RegisterService(service1, "")
+	if err != nil || !s.HasMethod("Service1.Multiply") {
+		t.Errorf("Expected to be registered: Service1.Multiply")
+	}
+	// Provided name.
+	err = s.RegisterService(service1, "Foo")
+	if err != nil || !s.HasMethod("Foo.Multiply") {
+		t.Errorf("Expected to be registered: Foo.Multiply")
+	}
+	// No methods.
+	err = s.RegisterService(service2, "")
+	if err == nil {
+		t.Errorf("Expected error on service2")
+	}
+}