Add redirects policy to QNetworkAccessManager

This patch makes it possible to enable/disable redirects on QNAM
level (before it was per-request only). This policy would be applied
to all subsequent requests* created by QNAM.

The policies we support at the moment:
a. Manual - that's what we always had - it's up to a user to handle
   redirects.
b. NoLessSafeRedirectsPolicy - we allow http->http, http->https and
   https->https redirects, but no protocol 'downgrade' (no
   https->http redirects).
c. SameOriginPolicy - we check that protocol/host/port are
   the same.

Updated tst_qnetworkreply.

*We previously were enabling redirect for each request, by
 setting FollowRedirectsAttribute on QNetworkRequest object.
 For backward compatibility this attribute has a higher priority
 (if set) than QNAM's policy (and it will work as NoLessSafeRedirectsPolicy).

[ChangeLog][QtNetwork] Added redirects policy to QNAM

Task-number: QTPM-239
Task-number: QTPM-237
Change-Id: I493d1728254b71b61b5504937e8e01dca5953527
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

1 files changed, 8 insertions, 2 deletions

diff --git a/src/network/access/qnetworkreplyhttpimpl.cpp b/src/network/access/qnetworkreplyhttpimpl.cpp
index 00f3468ebd..03ed596586 100644
--- a/src/network/access/qnetworkreplyhttpimpl.cpp
+++ b/src/network/access/qnetworkreplyhttpimpl.cpp
@@ -655,8 +655,14 @@ void QNetworkReplyHttpImplPrivate::postRequest(const QNetworkRequest &newHttpReq
     }
 #endif
 
-    if (newHttpRequest.attribute(QNetworkRequest::FollowRedirectsAttribute).toBool())
-        httpRequest.setFollowRedirects(true);
+    auto redirectsPolicy = QNetworkRequest::ManualRedirectsPolicy;
+    const QVariant value = newHttpRequest.attribute(QNetworkRequest::RedirectsPolicyAttribute);
+    if (value.isValid())
+        redirectsPolicy = value.value<QNetworkRequest::RedirectsPolicy>();
+    else if (newHttpRequest.attribute(QNetworkRequest::FollowRedirectsAttribute).toBool())
+        redirectsPolicy = QNetworkRequest::NoLessSafeRedirectsPolicy;
+
+    httpRequest.setRedirectsPolicy(redirectsPolicy);
 
     httpRequest.setPriority(convert(newHttpRequest.priority()));