Add QDebug support to QHttpPart

As part of QTBUG-114647 we are planning to introduce a deduction
mechanism that could deduce the contentType header and the
contentDisposition headers based on the arguments (and the MIME
database).

In case of non-trivial types this deduction may give the wrong result
and without QDebug support it might be a bit tedious to check.

The debug output displays some information about the body device if
one is attached, otherwise it displays the size of the body.

Task-number: QTBUG-114647
Change-Id: Ia693b078ff5b9f8ea57fbf3c385edaec47886ff1
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

2 files changed, 46 insertions, 0 deletions

diff --git a/src/network/access/qhttpmultipart.cpp b/src/network/access/qhttpmultipart.cpp
index 6d81f1b957..2b5f1163c8 100644
--- a/src/network/access/qhttpmultipart.cpp
+++ b/src/network/access/qhttpmultipart.cpp
@@ -511,6 +511,48 @@ qint64 QHttpMultiPartIODevice::writeData(const char *data, qint64 maxSize)
     return -1;
 }
 
+#ifndef QT_NO_DEBUG_STREAM
+
+/*!
+    \fn QDebug QHttpPart::operator<<(QDebug debug, const QHttpPart &part)
+
+    Writes the \a part into the \a debug object for debugging purposes.
+    Unless a device is set, the size of the body is shown.
+
+    \sa {Debugging Techniques}
+    \since 6.8
+*/
+
+QDebug operator<<(QDebug debug, const QHttpPart &part)
+{
+    const QDebugStateSaver saver(debug);
+    debug.resetFormat().nospace().noquote();
+
+    debug << "QHttpPart(headers = ["
+          << part.d->cookedHeaders
+          << "], raw headers = ["
+          << part.d->rawHeaders
+          << "],";
+
+    if (part.d->bodyDevice) {
+        debug << " bodydevice = ["
+              << part.d->bodyDevice
+              << ", is open: "
+              << part.d->bodyDevice->isOpen()
+              << "]";
+    } else {
+        debug << " size of body = "
+              << part.d->body.size()
+              << " bytes";
+    }
+
+    debug << ")";
+
+    return debug;
+}
+
+#endif // QT_NO_DEBUG_STREAM
+
 
 QT_END_NAMESPACE
 
diff --git a/src/network/access/qhttpmultipart.h b/src/network/access/qhttpmultipart.h
index 26e5fafdf2..9732bbd99d 100644
--- a/src/network/access/qhttpmultipart.h
+++ b/src/network/access/qhttpmultipart.h
@@ -19,6 +19,7 @@ QT_BEGIN_NAMESPACE
 
 class QHttpPartPrivate;
 class QHttpMultiPart;
+class QDebug;
 
 class Q_NETWORK_EXPORT QHttpPart
 {
@@ -45,6 +46,9 @@ private:
     QSharedDataPointer<QHttpPartPrivate> d;
 
     friend class QHttpMultiPartIODevice;
+#ifndef QT_NO_DEBUG_STREAM
+    friend Q_NETWORK_EXPORT QDebug operator<<(QDebug debug, const QHttpPart &httpPart);
+#endif
 };
 
 Q_DECLARE_SHARED(QHttpPart)