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Code Issues Packages Projects Releases Wiki Activity

Lookup MX record for email domains

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M66B
2019-09-08 13:22:44 +02:00
parent d9d601ef4a
commit ab34587e3f
3 changed files with 40 additions and 12 deletions
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26
app/src/main/java/eu/faircode/email/IPInfo.java
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@@ -19,6 +19,7 @@ package eu.faircode.email;
Copyright 2018-2019 by Marcel Bokhorst (M66B)
*/
import android.content.Context;
import android.net.MailTo;
import android.net.ParseException;
import android.net.Uri;
@@ -35,30 +36,33 @@ import java.util.Map;
import javax.net.ssl.HttpsURLConnection;
public class IPInfo {
private static Map<String, String> hostOrganization = new HashMap<>();
private static Map<InetAddress, String> hostOrganization = new HashMap<>();
static String[] getOrganization(Uri uri) throws IOException, ParseException {
static String[] getOrganization(Uri uri, Context context) throws IOException, ParseException {
if ("mailto".equals(uri.getScheme())) {
MailTo email = MailTo.parse(uri.toString());
String to = email.getTo();
if (to == null || !to.contains("@"))
throw new UnknownHostException();
String host = to.substring(to.indexOf('@') + 1);
return getOrganization(host);
String domain = to.substring(to.indexOf('@') + 1);
InetAddress address = ConnectionHelper.lookupMx(domain, context);
if (address == null)
throw new UnknownHostException();
return new String[]{domain, getOrganization(address)};
} else {
String host = uri.getHost();
if (host == null)
throw new UnknownHostException();
return getOrganization(host);
InetAddress address = InetAddress.getByName(host);
return new String[]{host, getOrganization(address)};
}
}
private static String[] getOrganization(String host) throws IOException {
private static String getOrganization(InetAddress address) throws IOException {
synchronized (hostOrganization) {
if (hostOrganization.containsKey(host))
return new String[]{host, hostOrganization.get(host)};
if (hostOrganization.containsKey(address))
return hostOrganization.get(address);
}
InetAddress address = InetAddress.getByName(host);
URL url = new URL("https://ipinfo.io/" + address.getHostAddress() + "/org");
Log.i("GET " + url);
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
@@ -70,9 +74,9 @@ public class IPInfo {
if ("undefined".equals(organization))
organization = null;
synchronized (hostOrganization) {
hostOrganization.put(host, organization);
hostOrganization.put(address, organization);
}
return new String[]{host, organization};
return organization;
}
}
}