QNetworkAccessManager: Support HTTP redirection

This commit adds support for following HTTP redirect responses on a per
request basis.

This behavior is disabled by default. It can be switched on by
setting the QNetworkRequest::FollowRedirectAttribute to true.

2 new error codes have been added to QNetworkReply:

* TooManyRedirectsError: Set when the number of redirects exceed a
given value set by the user (defaults to 50 if not set)

* UnsecureRedirectError: Set when we are redirecting from a 'https'
to 'http' protocol.

Test cases for the following scenarios:
* Single HTTP redirect using local test server
* Changing max-redirects
* Testing all redirect related error scenarios

The next commit will extend this feature at a QNAM level.

Task-number: QTBUG-8232
Change-Id: If9e28ad12bad08bcdc5bc511b1cd59dc9d8150f0
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>

1 files changed, 23 insertions, 1 deletions

diff --git a/src/network/access/qhttpnetworkrequest.cpp b/src/network/access/qhttpnetworkrequest.cpp
index ea1cd3d591..64172fc4fd 100644
--- a/src/network/access/qhttpnetworkrequest.cpp
+++ b/src/network/access/qhttpnetworkrequest.cpp
@@ -42,7 +42,7 @@ QHttpNetworkRequestPrivate::QHttpNetworkRequestPrivate(QHttpNetworkRequest::Oper
         QHttpNetworkRequest::Priority pri, const QUrl &newUrl)
     : QHttpNetworkHeaderPrivate(newUrl), operation(op), priority(pri), uploadByteDevice(0),
       autoDecompress(false), pipeliningAllowed(false), spdyAllowed(false),
-      withCredentials(true), preConnect(false)
+      withCredentials(true), preConnect(false), followRedirect(false), redirectCount(0)
 {
 }
 
@@ -59,6 +59,8 @@ QHttpNetworkRequestPrivate::QHttpNetworkRequestPrivate(const QHttpNetworkRequest
     withCredentials = other.withCredentials;
     ssl = other.ssl;
     preConnect = other.preConnect;
+    followRedirect = other.followRedirect;
+    redirectCount = other.redirectCount;
 }
 
 QHttpNetworkRequestPrivate::~QHttpNetworkRequestPrivate()
@@ -217,6 +219,26 @@ void QHttpNetworkRequest::setPreConnect(bool preConnect)
     d->preConnect = preConnect;
 }
 
+bool QHttpNetworkRequest::isFollowRedirects() const
+{
+    return d->followRedirect;
+}
+
+void QHttpNetworkRequest::setFollowRedirects(bool followRedirect)
+{
+    d->followRedirect = followRedirect;
+}
+
+int QHttpNetworkRequest::redirectCount() const
+{
+    return d->redirectCount;
+}
+
+void QHttpNetworkRequest::setRedirectCount(int count)
+{
+    d->redirectCount = count;
+}
+
 qint64 QHttpNetworkRequest::contentLength() const
 {
     return d->contentLength();