avformat/libamqp: parse vhost in uri

Reviewed-by: Marton Balint <cus@passwd.hu>
Signed-off-by: Andriy Gelman <andriy.gelman@gmail.com>

doc/protocols.texi

@@ -63,16 +63,17 @@ After starting the broker, an FFmpeg client may stream data to the broker using
 the command:
 
 @example
-ffmpeg -re -i input -f mpegts amqp://[[user]:[password]@@]hostname[:port]
+ffmpeg -re -i input -f mpegts amqp://[[user]:[password]@@]hostname[:port][/vhost]
 @end example
 
 Where hostname and port (default is 5672) is the address of the broker. The
 client may also set a user/password for authentication. The default for both
-fields is "guest".
+fields is "guest". Name of virtual host on broker can be set with vhost. The
+default value is "/".
 
 Muliple subscribers may stream from the broker using the command:
 @example
-ffplay amqp://[[user]:[password]@@]hostname[:port]
+ffplay amqp://[[user]:[password]@@]hostname[:port][/vhost]
 @end example
 
 In RabbitMQ all data published to the broker flows through a specific exchange,

libavformat/libamqp.c

@@ -62,10 +62,10 @@ static const AVOption options[] = {
 static int amqp_proto_open(URLContext *h, const char *uri, int flags)
 {
     int ret, server_msg;
-    char hostname[STR_LEN], credentials[STR_LEN];
+    char hostname[STR_LEN], credentials[STR_LEN], path[STR_LEN];
     int port;
-    const char *user, *password = NULL;
-    const char *user_decoded, *password_decoded;
+    const char *user, *password = NULL, *vhost;
+    const char *user_decoded, *password_decoded, *vhost_decoded;
     char *p;
     amqp_rpc_reply_t broker_reply;
     struct timeval tval = { 0 };
@@ -76,7 +76,7 @@ static int amqp_proto_open(URLContext *h, const char *uri, int flags)
     h->max_packet_size = s->pkt_size;
 
     av_url_split(NULL, 0, credentials, sizeof(credentials),
-                 hostname, sizeof(hostname), &port, NULL, 0, uri);
+                 hostname, sizeof(hostname), &port, path, sizeof(path), uri);
 
     if (port < 0)
         port = 5672;
@@ -109,8 +109,27 @@ static int amqp_proto_open(URLContext *h, const char *uri, int flags)
         return AVERROR(ENOMEM);
     }
 
+    /* skip query for now */
+    p = strchr(path, '?');
+    if (p)
+        *p = '\0';
+
+    vhost = path;
+    if (*vhost == '\0')
+        vhost = "/";
+    else
+        vhost++; /* skip leading '/' */
+
+    vhost_decoded = ff_urldecode(vhost, 0);
+    if (!vhost_decoded) {
+        av_freep(&user_decoded);
+        av_freep(&password_decoded);
+        return AVERROR(ENOMEM);
+    }
+
     s->conn = amqp_new_connection();
     if (!s->conn) {
+        av_freep(&vhost_decoded);
         av_freep(&user_decoded);
         av_freep(&password_decoded);
         av_log(h, AV_LOG_ERROR, "Error creating connection\n");
@@ -136,7 +155,7 @@ static int amqp_proto_open(URLContext *h, const char *uri, int flags)
         goto destroy_connection;
     }
 
-    broker_reply = amqp_login(s->conn, "/", 0, s->pkt_size, 0,
+    broker_reply = amqp_login(s->conn, vhost_decoded, 0, s->pkt_size, 0,
                               AMQP_SASL_METHOD_PLAIN, user_decoded, password_decoded);
 
     if (broker_reply.reply_type != AMQP_RESPONSE_NORMAL) {
@@ -195,6 +214,7 @@ static int amqp_proto_open(URLContext *h, const char *uri, int flags)
         }
     }
 
+    av_freep(&vhost_decoded);
     av_freep(&user_decoded);
     av_freep(&password_decoded);
     return 0;
@@ -206,6 +226,7 @@ close_connection:
 destroy_connection:
     amqp_destroy_connection(s->conn);
 
+    av_freep(&vhost_decoded);
     av_freep(&user_decoded);
     av_freep(&password_decoded);
     return AVERROR_EXTERNAL;