diff options
author | Markus Goetz <markus@woboq.com> | 2015-04-10 14:09:53 +0200 |
---|---|---|
committer | Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com> | 2015-04-20 08:00:02 +0000 |
commit | cff39fba10ffc10ee4dcfdc66ff6528eb26462d3 (patch) | |
tree | 8ce12256215c34495a30f050ee8b0d6f5c6018c6 /src/network/access/qnetworkreplyhttpimpl.cpp | |
parent | 68c137cc725ceadec68c455e0e3e365ecb00f2c1 (diff) |
QNAM: Fix upload corruptions when server closes connection
This patch fixes several upload corruptions if the server closes the connection
while/before we send data into it. They happen inside multiple places in the HTTP
layer and are explained in the comments.
Corruptions are:
* The upload byte device has an in-flight signal with pending upload data, if
it gets reset (because server closes the connection) then the re-send of the
request was sometimes taking this stale in-flight pending upload data.
* Because some signals were DirectConnection and some were QueuedConnection, there
was a chance that a direct signal overtakes a queued signal. The state machine
then sent data down the socket which was buffered there (and sent later) although
it did not match the current state of the state machine when it was actually sent.
* A socket was seen as being able to have requests sent even though it was not
encrypted yet. This relates to the previous corruption where data is stored inside
the socket's buffer and then sent later.
The included auto test produces all fixed corruptions, I detected no regressions
via the other tests.
This code also adds a bit of sanity checking to protect from possible further
problems.
[ChangeLog][QtNetwork] Fix HTTP(s) upload corruption when server closes connection
Change-Id: I54c883925ec897050941498f139c4b523030432e
Reviewed-by: Peter Hartmann <peter-qt@hartmann.tk>
Diffstat (limited to 'src/network/access/qnetworkreplyhttpimpl.cpp')
-rw-r--r-- | src/network/access/qnetworkreplyhttpimpl.cpp | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/src/network/access/qnetworkreplyhttpimpl.cpp b/src/network/access/qnetworkreplyhttpimpl.cpp index 4ce7303dbb..974a101e9c 100644 --- a/src/network/access/qnetworkreplyhttpimpl.cpp +++ b/src/network/access/qnetworkreplyhttpimpl.cpp @@ -424,6 +424,7 @@ QNetworkReplyHttpImplPrivate::QNetworkReplyHttpImplPrivate() , synchronous(false) , state(Idle) , statusCode(0) + , uploadByteDevicePosition(false) , uploadDeviceChoking(false) , outgoingData(0) , bytesUploaded(-1) @@ -863,9 +864,9 @@ void QNetworkReplyHttpImplPrivate::postRequest() q, SLOT(uploadByteDeviceReadyReadSlot()), Qt::QueuedConnection); - // From main thread to user thread: - QObject::connect(q, SIGNAL(haveUploadData(QByteArray,bool,qint64)), - forwardUploadDevice, SLOT(haveDataSlot(QByteArray,bool,qint64)), Qt::QueuedConnection); + // From user thread to http thread: + QObject::connect(q, SIGNAL(haveUploadData(qint64,QByteArray,bool,qint64)), + forwardUploadDevice, SLOT(haveDataSlot(qint64,QByteArray,bool,qint64)), Qt::QueuedConnection); QObject::connect(uploadByteDevice.data(), SIGNAL(readyRead()), forwardUploadDevice, SIGNAL(readyRead()), Qt::QueuedConnection); @@ -873,8 +874,8 @@ void QNetworkReplyHttpImplPrivate::postRequest() // From http thread to user thread: QObject::connect(forwardUploadDevice, SIGNAL(wantData(qint64)), q, SLOT(wantUploadDataSlot(qint64))); - QObject::connect(forwardUploadDevice, SIGNAL(processedData(qint64)), - q, SLOT(sentUploadDataSlot(qint64))); + QObject::connect(forwardUploadDevice,SIGNAL(processedData(qint64, qint64)), + q, SLOT(sentUploadDataSlot(qint64,qint64))); QObject::connect(forwardUploadDevice, SIGNAL(resetData(bool*)), q, SLOT(resetUploadDataSlot(bool*)), Qt::BlockingQueuedConnection); // this is the only one with BlockingQueued! @@ -1268,12 +1269,22 @@ void QNetworkReplyHttpImplPrivate::replySslConfigurationChanged(const QSslConfig void QNetworkReplyHttpImplPrivate::resetUploadDataSlot(bool *r) { *r = uploadByteDevice->reset(); + if (*r) { + // reset our own position which is used for the inter-thread communication + uploadByteDevicePosition = 0; + } } // Coming from QNonContiguousByteDeviceThreadForwardImpl in HTTP thread -void QNetworkReplyHttpImplPrivate::sentUploadDataSlot(qint64 amount) +void QNetworkReplyHttpImplPrivate::sentUploadDataSlot(qint64 pos, qint64 amount) { + if (uploadByteDevicePosition + amount != pos) { + // Sanity check, should not happen. + error(QNetworkReply::UnknownNetworkError, ""); + return; + } uploadByteDevice->advanceReadPointer(amount); + uploadByteDevicePosition += amount; } // Coming from QNonContiguousByteDeviceThreadForwardImpl in HTTP thread @@ -1298,7 +1309,7 @@ void QNetworkReplyHttpImplPrivate::wantUploadDataSlot(qint64 maxSize) QByteArray dataArray(data, currentUploadDataLength); // Communicate back to HTTP thread - emit q->haveUploadData(dataArray, uploadByteDevice->atEnd(), uploadByteDevice->size()); + emit q->haveUploadData(uploadByteDevicePosition, dataArray, uploadByteDevice->atEnd(), uploadByteDevice->size()); } void QNetworkReplyHttpImplPrivate::uploadByteDeviceReadyReadSlot() |