Do not proceed with uninitialized resources

QRC files can be optimized with CONFIG+=qtquickcompiler
and removed, in that case 'size' of
resource is zero.

Do not process 'empty' resources. Throw warning.

Fixes: QTBUG-76403
Change-Id: If21ff698e7985f82e6456500d4d24cb366cff012
Reviewed-by: Kai Koehne <[email protected]>

Author: Michal Klocek

src/core/net/url_request_qrc_job_qt.cpp

@@ -120,14 +120,14 @@ void URLRequestQrcJobQt::startGetHead()
     QMimeType mimeType = mimeDatabase.mimeTypeForFile(qrcFileInfo);
     m_mimeType = mimeType.name().toStdString();
     // Open file
-    if (m_file.open(QIODevice::ReadOnly)) {
+    if (m_file.open(QIODevice::ReadOnly) && m_file.size() > 0) {
         m_remainingBytes = m_file.size();
         set_expected_content_size(m_remainingBytes);
         // Notify that the headers are complete
         NotifyHeadersComplete();
-    } else {
-        NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED, ERR_INVALID_URL));
+        return;
     }
+    qWarning("Resource %s not found or is empty", qUtf8Printable(qrcFilePath));
+    NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED, ERR_INVALID_URL));
 }
-
 } // namespace QtWebEngineCore