QNam: try to read the last CRLF when chunked encoding is used.

When chunked encoding is used we should try to read the last CRLF after
the last zero-lenght chunk, with chunk size coded as 0.

Task-number: QTBUG-19480
Task-number: QTBUG-20924

Change-Id: I39c85f45c329246d6c53c29ba1511039b2503e13
Reviewed-by: Shane Kearns <[email protected]>
(cherry picked from commit 2cfc2a2)
Reviewed-by: Jaakko Helanti <[email protected]>
Reviewed-by: Pasi Pentikäinen <[email protected]>

Author: Martin Petersson

src/network/access/qhttpnetworkreply.cpp

@@ -252,6 +252,7 @@ QHttpNetworkReplyPrivate::QHttpNetworkReplyPrivate(const QUrl &newUrl)
       chunkedTransferEncoding(false),
       connectionCloseEnabled(true),
       forceConnectionCloseEnabled(false),
+      lastChunkRead(false),
       currentChunkSize(0), currentChunkRead(0), connection(0), initInflate(false),
       autoDecompress(false), responseData(), requestIsPrepared(false)
       ,pipeliningUsed(false), downstreamLimited(false)
@@ -272,6 +273,7 @@ void QHttpNetworkReplyPrivate::clearHttpLayerInformation()
     totalProgress = 0;
     currentChunkSize = 0;
     currentChunkRead = 0;
+    lastChunkRead = false;
     connectionCloseEnabled = true;
 #ifndef QT_NO_COMPRESS
     if (initInflate)
@@ -770,7 +772,7 @@ qint64 QHttpNetworkReplyPrivate::readReplyBodyChunked(QAbstractSocket *socket, Q
 {
     qint64 bytes = 0;
     while (socket->bytesAvailable()) {
-        if (currentChunkRead >= currentChunkSize) {
+        if (!lastChunkRead && currentChunkRead >= currentChunkSize) {
             // For the first chunk and when we're done with a chunk
             currentChunkSize = 0;
             currentChunkRead = 0;
@@ -793,8 +795,23 @@ qint64 QHttpNetworkReplyPrivate::readReplyBodyChunked(QAbstractSocket *socket, Q
                 break;
         }
         // if the chunk size is 0, end of the stream
-        if (currentChunkSize == 0) {
-            state = AllDoneState;
+        if (currentChunkSize == 0 || lastChunkRead) {
+            lastChunkRead = true;
+            // try to read the "\r\n" after the chunk
+            char crlf[2];
+            qint64 haveRead = socket->read(crlf, 2);
+            if (haveRead > 0)
+                bytes += haveRead;
+
+            if ((haveRead == 2 && crlf[0] == '\r' && crlf[1] == '\n') || (haveRead == 1 && crlf[0] == '\n'))
+                state = AllDoneState;
+            else if (haveRead == 1 && crlf[0] == '\r')
+                break; // Still waiting for the last \n
+            else if (haveRead > 0) {
+                // If we read something else then CRLF, we need to close the channel.
+                forceConnectionCloseEnabled = true;
+                state = AllDoneState;
+            }
             break;
         }
 

src/network/access/qhttpnetworkreply_p.h

@@ -233,6 +233,7 @@ class QHttpNetworkReplyPrivate : public QObjectPrivate, public QHttpNetworkHeade
     bool chunkedTransferEncoding;
     bool connectionCloseEnabled;
     bool forceConnectionCloseEnabled;
+    bool lastChunkRead;
     qint64 currentChunkSize;
     qint64 currentChunkRead;
     QPointer<QHttpNetworkConnection> connection;