[QGIS-Developer] MultiPart post network request stopped working in master

[Raymond Nijssen]

Thank you Alessandro, just filed the bug:

https://github.com/qgis/QGIS/issues/46989

I'm not allowed to assign it to you, so could you please do that 
yourself. And if you need any help from me just let me know.

Kind regards,
Raymond


On 24-01-2022 11:11, Alessandro Pasotti wrote:
> Hi Raymond,
> 
> can you please file a bug and assign it to me, I'll have a look.
> 
> 
> 
> On Sat, Jan 22, 2022 at 1:32 PM Raymond Nijssen <r.nijssen at terglobo.nl 
> <mailto:r.nijssen at terglobo.nl>> wrote:
> 
>     Dear all,
> 
>     One of my plugins stopped working in QGIS master, because some of the
>     requests seem invalid. I spent quite some time on debugging but cannot
>     find the problem.
> 
>     This script runs in 3.22.3 but not ion 3.23. It uploads an xml file
>     to a
>     validation service. It should print: {'successful': True, 'errors': [],
>     'warnings': []}
> 
>     Anyone a clue? I'm feeling that the best way would be using the
>     QgsBlockingNetworkRequest post() function but that does not seem to
>     work
>     with a QHttpMultiPart variable.
> 
>     Thanks!
>     Raymond
> 
> 
> 
>     import json
> 
>     manager = QgsNetworkAccessManager.instance()
> 
>     url = QUrl('https://connect.aerius.nl/api/v7/utility/validate
>     <https://connect.aerius.nl/api/v7/utility/validate>')
> 
>     request = QNetworkRequest(url)
> 
>     multi_part = QHttpMultiPart(QHttpMultiPart.FormDataType)
> 
>     file_parts = []
>     gml_fn =
>     '/home/raymond/terglobo/projecten/aerius/202007_calc_input_plugin/demodata/test_20220121/test_kort.gml'
> 
>     file_parts.append({'name': 'filePart', 'file_name': gml_fn,
>     'file_type':
>     'application/gml+xml'})
> 
>     for fp in file_parts:
>           file = QFile(fp['file_name'])
>           file_part = QHttpPart()
>           file_part.setHeader(QNetworkRequest.ContentTypeHeader,
>     QVariant(fp['file_type']))
>           name = fp['name']
>           file_part.setHeader(QNetworkRequest.ContentDispositionHeader,
>               QVariant(f'form-data; name="{name}";
>     filename="{QFileInfo(file).fileName()}"'))
>           file.open(QIODevice.ReadOnly)
>           file_part.setBodyDevice(file)
>           file.setParent(multi_part)
>           multi_part.append(file_part)
> 
>     # This line already fires an invalid request in qgis 3.23:
>     reply = manager.post <http://manager.post>(request, multi_part)
> 
> 
>     # In qgis 3.22 the request is ok. The rest of the code will wait for
>     the
>     json
>     # reply and display it.
> 
> 
>     # make request blocking
>     loop = QEventLoop()
>     reply.finished.connect(loop.quit)
>     loop.exec_()
> 
> 
>     bstr = reply.readAll()
>     result_dict = json.loads(bytes(bstr))
>     print(result_dict)
> 
> 
> 
> 
> 
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> 
> -- 
> Alessandro Pasotti
> QCooperative: www.qcooperative.net <https://www.qcooperative.net>
> ItOpen: www.itopen.it <http://www.itopen.it>