def _get_sync(self, qurl: QUrl, timeout: int = 20000) -> Reply:
'''
synchronous GET-request
'''
request = QNetworkRequest(qurl)
## newer versions of QGIS (3.6+) support synchronous requests
#if hasattr(self._manager, 'blockingGet'):
#reply = self._manager.blockingGet(request, forceRefresh=True)
## use blocking event loop for older versions
#else:
loop = QEventLoop()
timer = QTimer()
timer.setSingleShot(True)
# reply or timeout break event loop, whoever comes first
timer.timeout.connect(loop.quit)
reply = self._manager.get(request)
reply.finished.connect(loop.quit)
timer.start(timeout)
# start blocking loop
loop.exec()
loop.deleteLater()
if not timer.isActive():
reply.deleteLater()
raise ConnectionError('Timeout')
timer.stop()
#if reply.error():
#self.error.emit(reply.errorString())
#raise ConnectionError(reply.errorString())
res = Reply(reply)
self.finished.emit(res)
return res
def _post_sync(self,
qurl: QUrl,
timeout: int = 20000,
data: bytes = b'',
content_type=None):
'''
synchronous POST-request
'''
request = QNetworkRequest(qurl)
if content_type:
request.setHeader(QNetworkRequest.ContentTypeHeader, content_type)
# newer versions of QGIS (3.6+) support synchronous requests
if hasattr(self._manager, 'blockingPost'):
reply = self._manager.blockingPost(request,
data,
forceRefresh=True)
# use blocking event loop for older versions
else:
loop = QEventLoop()
timer = QTimer()
timer.setSingleShot(True)
# reply or timeout break event loop, whoever comes first
timer.timeout.connect(loop.quit)
reply = self._manager.post(request, data)
reply.finished.connect(loop.quit)
timer.start(timeout)
# start blocking loop
loop.exec()
loop.deleteLater()
if not timer.isActive():
reply.deleteLater()
raise ConnectionError('Timeout')
timer.stop()
if reply.error():
self.error.emit(reply.errorString())
raise ConnectionError(reply.errorString())
res = Reply(reply)
self.finished.emit(res)
return res
