Abort underlying socket when aborting QNetworkReply

If we abort a connection in QNetworkReply::encrypted the underlying
socket gets flushed. This patch fixes that no data will be transmitted
after someone called abort().

Change-Id: I59306e69cb9f2e1421b324e11947375130e52135
Task-number: QTBUG-47471
Reviewed-by: Markus Goetz (Woboq GmbH) <markus@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/network/access/qhttpnetworkconnection.cpp

@@ -835,8 +835,13 @@ void QHttpNetworkConnectionPrivate::removeReply(QHttpNetworkReply *reply)
             // if HTTP mandates we should close
             // or the reply is not finished yet, e.g. it was aborted
             // we have to close that connection
-            if (reply->d_func()->isConnectionCloseEnabled() || !reply->isFinished())
-                channels[i].close();
+            if (reply->d_func()->isConnectionCloseEnabled() || !reply->isFinished()) {
+                if (reply->isAborted()) {
+                    channels[i].abort();
+                } else {
+                    channels[i].close();
+                }
+            }
 
             QMetaObject::invokeMethod(q, "_q_startNextRequest", Qt::QueuedConnection);
             return;

src/network/access/qhttpnetworkconnectionchannel.cpp

@@ -205,6 +205,26 @@ void QHttpNetworkConnectionChannel::close()
 }
 
 
+void QHttpNetworkConnectionChannel::abort()
+{
+    if (!socket)
+        state = QHttpNetworkConnectionChannel::IdleState;
+    else if (socket->state() == QAbstractSocket::UnconnectedState)
+        state = QHttpNetworkConnectionChannel::IdleState;
+    else
+        state = QHttpNetworkConnectionChannel::ClosingState;
+
+    // pendingEncrypt must only be true in between connected and encrypted states
+    pendingEncrypt = false;
+
+    if (socket) {
+        // socket can be 0 since the host lookup is done from qhttpnetworkconnection.cpp while
+        // there is no socket yet.
+        socket->abort();
+    }
+}
+
+
 bool QHttpNetworkConnectionChannel::sendRequest()
 {
     Q_ASSERT(!protocolHandler.isNull());

src/network/access/qhttpnetworkconnectionchannel_p.h

@@ -157,6 +157,7 @@ public:
 
     void init();
     void close();
+    void abort();
 
     bool sendRequest();
 

src/network/access/qhttpnetworkreply.cpp

@@ -247,6 +247,17 @@ char* QHttpNetworkReply::userProvidedDownloadBuffer()
     return d->userProvidedDownloadBuffer;
 }
 
+void QHttpNetworkReply::abort()
+{
+    Q_D(QHttpNetworkReply);
+    d->state = QHttpNetworkReplyPrivate::Aborted;
+}
+
+bool QHttpNetworkReply::isAborted() const
+{
+    return d_func()->state == QHttpNetworkReplyPrivate::Aborted;
+}
+
 bool QHttpNetworkReply::isFinished() const
 {
     return d_func()->state == QHttpNetworkReplyPrivate::AllDoneState;

src/network/access/qhttpnetworkreply_p.h

@@ -121,6 +121,9 @@ public:
     void setUserProvidedDownloadBuffer(char*);
     char* userProvidedDownloadBuffer();
 
+    void abort();
+
+    bool isAborted() const;
     bool isFinished() const;
 
     bool isPipeliningUsed() const;
@@ -205,7 +208,8 @@ public:
         SPDYSYNSent,
         SPDYUploading,
         SPDYHalfClosed,
-        SPDYClosed
+        SPDYClosed,
+        Aborted
     } state;
 
     QHttpNetworkRequest request;

src/network/access/qhttpthreaddelegate.cpp

@@ -396,6 +396,7 @@ void QHttpThreadDelegate::abortRequest()
     qDebug() << "QHttpThreadDelegate::abortRequest() thread=" << QThread::currentThreadId() << "sync=" << synchronous;
 #endif
     if (httpReply) {
+        httpReply->abort();
         delete httpReply;
         httpReply = 0;
     }