QNAM HTTP: Fix bug with explicitly zero-length compressed responses.

In the case of a response with e.g content-encoding "gzip" and
content-length "0", the HTTP backend would incorrectly fall back to
the "unspecified length" code path and wait for readyRead() forever.

Task-number: QTBUG-18232
Reviewed-by: Markus Goetz

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/auto/qnetworkreply/tst_qnetworkreply.cpp b/tests/auto/qnetworkreply/tst_qnetworkreply.cpp
index 2c79951..48b3ecc 100644
--- a/tests/auto/qnetworkreply/tst_qnetworkreply.cpp
+++ b/tests/auto/qnetworkreply/tst_qnetworkreply.cpp
@@ -337,6 +337,8 @@ private Q_SLOTS:
 
     void qtbug15311doubleContentLength();
 
+    void qtbug18232gzipContentLengthZero();
+
     void synchronousRequest_data();
     void synchronousRequest();
 #ifndef QT_NO_OPENSSL
@@ -5532,6 +5534,25 @@ void tst_QNetworkReply::qtbug15311doubleContentLength()
     QCOMPARE(reply->readAll(), QByteArray("ABC"));
 }
 
+void tst_QNetworkReply::qtbug18232gzipContentLengthZero()
+{
+    QByteArray response("HTTP/1.0 200 OK\r\nContent-Encoding: gzip\r\nContent-Length: 0\r\n\r\n");
+    MiniHttpServer server(response);
+    server.doClose = true;
+
+    QNetworkRequest request(QUrl("http://localhost:" + QString::number(server.serverPort())));
+    QNetworkReplyPtr reply = manager.get(request);
+
+    connect(reply, SIGNAL(finished()), &QTestEventLoop::instance(), SLOT(exitLoop()));
+    QTestEventLoop::instance().enterLoop(10);
+    QVERIFY(!QTestEventLoop::instance().timeout());
+    QVERIFY(reply->isFinished());
+    QCOMPARE(reply->error(), QNetworkReply::NoError);
+    QCOMPARE(reply->size(), qint64(0));
+    QCOMPARE(reply->header(QNetworkRequest::ContentLengthHeader).toLongLong(), qint64(0));
+    QCOMPARE(reply->readAll(), QByteArray());
+}
+
 void tst_QNetworkReply::synchronousRequest_data()
 {
     QTest::addColumn<QUrl>("url");