Add QHttpHeaders::valueAt() function

We need a way for users to consume the complete contents of
QHttpHeaders.

For now, the only way is

    for (const auto &name : h.names())
        use(h.value/combinedValue(name));

which is quadratic.

Adding the usual iterators and operator[] would require us to
expose the underlying value_type, which we're not ready to do, yet.

So add valueAt() and (in a follow-up) nameAt() functions to enable
efficient indexed iteration without the need to expose a value_type.

Resulted from API-review

Pick-to: 6.7
Change-Id: I863f59618cea5682386ce26b66b4b1655eac7950
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/auto/network/access/qhttpheaders/tst_qhttpheaders.cpp b/tests/auto/network/access/qhttpheaders/tst_qhttpheaders.cpp
index 7a7e1da0a4..77f265c9e9 100644
--- a/tests/auto/network/access/qhttpheaders/tst_qhttpheaders.cpp
+++ b/tests/auto/network/access/qhttpheaders/tst_qhttpheaders.cpp
@@ -186,6 +186,15 @@ void tst_QHttpHeaders::accessors()
     QCOMPARE(h1.size(), 5);
     QCOMPARE(h1.names().size(), 2);
 
+    // valueAt()
+    h1.clear();
+    h1.append(n1, v1);
+    h1.append(n2, v2);
+    h1.append(n3, v3);
+    QCOMPARE(h1.valueAt(0), v1);
+    QCOMPARE(h1.valueAt(1), v2);
+    QCOMPARE(h1.valueAt(2), v3);
+
     // removeAll()
     h1.clear();
     QVERIFY(h1.append(n1, v1));