dash: Don't crash when a segment can't be accessed.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit 88dc675a)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/stream_filter/dash/http/HTTPConnection.cpp

@@ -66,11 +66,11 @@ void            HTTPConnection::parseURL        ()
     this->request = "GET " + this->path + " HTTP/1.1\r\n" +
                     "Host: " + this->hostname + "\r\nConnection: close\r\n\r\n";
 }
-bool            HTTPConnection::init            ()
+bool            HTTPConnection::init()
 {
-    this->urlStream = stream_UrlNew(this->stream, this->url.c_str());
+    this->urlStream = stream_UrlNew( this->stream, this->url.c_str() );
 
-    if(!this->urlStream)
+    if( this->urlStream == NULL )
         return false;
 
     return true;

modules/stream_filter/dash/http/HTTPConnectionManager.cpp

@@ -127,7 +127,8 @@ int                 HTTPConnectionManager::read                     (Chunk *chun
         this->bytesReadChunk    = 0;
         this->timeSecChunk      = 0;
 
-        this->initConnection(chunk);
+        if ( this->initConnection(chunk) == NULL )
+            return -1;
         return this->read(chunk, p_buffer, len);
     }
 }
@@ -136,13 +137,16 @@ int                 HTTPConnectionManager::peek                     (Chunk *chun
     if(this->chunkMap.find(chunk) != this->chunkMap.end())
         return this->chunkMap[chunk]->peek(pp_peek, i_peek);
 
-    this->initConnection(chunk);
+    if ( this->initConnection(chunk) == NULL )
+        return -1;
     return this->peek(chunk, pp_peek, i_peek);
 }
-HTTPConnection*     HTTPConnectionManager::initConnection           (Chunk *chunk)
+
+IHTTPConnection*     HTTPConnectionManager::initConnection(Chunk *chunk)
 {
     HTTPConnection *con = new HTTPConnection(chunk->getUrl(), this->stream);
-    con->init();
+    if ( con->init() == false )
+        return NULL;
     this->connections.push_back(con);
     this->chunkMap[chunk] = con;
     this->chunkCount++;

modules/stream_filter/dash/http/HTTPConnectionManager.h

@@ -69,8 +69,8 @@ namespace dash
                 stream_t                                            *stream;
                 int                                                 chunkCount;
 
-                bool            closeConnection (Chunk *chunk);
-                HTTPConnection* initConnection  (Chunk *chunk);
+                bool                closeConnection( Chunk *chunk );
+                IHTTPConnection*    initConnection( Chunk *chunk );
 
         };
     }