use okhttp to fetch captcha

src/main/java/eu/siacs/conversations/http/HttpConnectionManager.java

@@ -4,6 +4,8 @@ import android.util.Log;
 
 import org.apache.http.conn.ssl.StrictHostnameVerifier;
 
+import java.io.IOException;
+import java.io.InputStream;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.Proxy;
@@ -28,6 +30,8 @@ import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.utils.TLSSocketFactory;
 import okhttp3.HttpUrl;
 import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.ResponseBody;
 
 public class HttpConnectionManager extends AbstractConnectionManager {
 
@@ -121,4 +125,22 @@ public class HttpConnectionManager extends AbstractConnectionManager {
         } catch (final KeyManagementException | NoSuchAlgorithmException ignored) {
         }
     }
+
+    public static InputStream open(final String url, final boolean tor) throws IOException {
+        return open(HttpUrl.get(url), tor);
+    }
+
+    public static InputStream open(final HttpUrl httpUrl, final boolean tor) throws IOException {
+        final OkHttpClient.Builder builder = new OkHttpClient.Builder();
+        if (tor) {
+            builder.proxy(HttpConnectionManager.getProxy()).build();
+        }
+        final OkHttpClient client = builder.build();
+        final Request request = new Request.Builder().get().url(httpUrl).build();
+        final ResponseBody body = client.newCall(request).execute().body();
+        if (body == null) {
+            throw new IOException("No response body found");
+        }
+        return body.byteStream();
+    }
 }

src/main/java/eu/siacs/conversations/http/URL.java

@@ -11,7 +11,6 @@ public class URL {
 
     public static final List<String> WELL_KNOWN_SCHEMES = Arrays.asList("http", "https", AesGcmURL.PROTOCOL_NAME);
 
-
     public static String tryParse(String url) {
         final URI uri;
         try {

src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java

@@ -22,7 +22,6 @@ import java.net.IDN;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.Socket;
-import java.net.URL;
 import java.net.UnknownHostException;
 import java.security.KeyManagementException;
 import java.security.NoSuchAlgorithmException;
@@ -69,6 +68,7 @@ import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.entities.ServiceDiscoveryResult;
 import eu.siacs.conversations.generator.IqGenerator;
+import eu.siacs.conversations.http.HttpConnectionManager;
 import eu.siacs.conversations.persistance.FileBackend;
 import eu.siacs.conversations.services.MemorizingTrustManager;
 import eu.siacs.conversations.services.MessageArchiveService;
@@ -87,7 +87,6 @@ import eu.siacs.conversations.xml.Tag;
 import eu.siacs.conversations.xml.TagWriter;
 import eu.siacs.conversations.xml.XmlReader;
 import eu.siacs.conversations.xmpp.forms.Data;
-import eu.siacs.conversations.xmpp.forms.Field;
 import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
 import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
 import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
@@ -973,11 +972,19 @@ public class XmppConnection implements Runnable {
                         is = null;
                     }
                 } else {
+                    final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
                     try {
-                        final Field field = data.getFieldByName("url");
+                        final String url = data.getValue("url");
-                        final URL url = field != null && field.getValue() != null ? new URL(field.getValue()) : null;
+                        final String fallbackUrl = data.getValue("captcha-fallback-url");
-                        is = url != null ? url.openStream() : null;
+                        if (url != null) {
-                    } catch (IOException e) {
+                            is = HttpConnectionManager.open(url, useTor);
+                        } else if (fallbackUrl != null) {
+                            is = HttpConnectionManager.open(fallbackUrl, useTor);
+                        } else {
+                            is = null;
+                        }
+                    } catch (final IOException e) {
+                        Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to fetch captcha", e);
                         is = null;
                     }
                 }