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, 5 insertions, 0 deletions

diff --git a/src/network/access/qnetworkrequest.h b/src/network/access/qnetworkrequest.h
index d6d907bdc4..c726db78cb 100644
--- a/src/network/access/qnetworkrequest.h
+++ b/src/network/access/qnetworkrequest.h
@@ -81,6 +81,7 @@ public:
         SpdyAllowedAttribute,
         SpdyWasUsedAttribute,
         EmitAllUploadProgressSignalsAttribute,
+        FollowRedirectsAttribute,
 
         User = 1000,
         UserMax = 32767
@@ -141,6 +142,10 @@ public:
     Priority priority() const;
     void setPriority(Priority priority);
 
+    // HTTP redirect related
+    int maximumRedirectsAllowed() const;
+    void setMaximumRedirectsAllowed(int maximumRedirectsAllowed);
+
 private:
     QSharedDataPointer<QNetworkRequestPrivate> d;
     friend class QNetworkRequestPrivate;