Error passing image path to Flask application-CodePudding

I have a Flask application that it supposed to receive two images and output a , but when I run the app I get these errors, the code is working perfectly without Flask

Errors:

[ WARN:[email protected]] global /io/opencv/modules/imgcodecs/src/loadsave.cpp (239) findDecoder imread_('/home/criuser/TÃ©lÃ©chargements/20210728_122019.jpg'): can't open/read file: check file path/integrity
[2022-02-15 22:17:15,439] ERROR in app: Exception on / [GET]
Traceback (most recent call last):
  File "/home/criuser/PycharmProjects/FINAL_AI/venv/lib/python3.8/site-packages/flask/app.py", line 2073, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/criuser/PycharmProjects/FINAL_AI/venv/lib/python3.8/site-packages/flask/app.py", line 1518, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/criuser/PycharmProjects/FINAL_AI/venv/lib/python3.8/site-packages/flask/app.py", line 1516, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/criuser/PycharmProjects/FINAL_AI/venv/lib/python3.8/site-packages/flask/app.py", line 1502, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
  File "/home/criuser/PycharmProjects/FINAL_AI/venv/final.py", line 19, in API
    result = change_bg.change_bg_img(f_image_path=original,
  File "/home/criuser/PycharmProjects/FINAL_AI/venv/lib/python3.8/site-packages/pixellib/tune_bg/__init__.py", line 236, in change_bg_img
    seg_image = self.segmentAsPascalvoc(f_image_path)
  File "/home/criuser/PycharmProjects/FINAL_AI/venv/lib/python3.8/site-packages/pixellib/tune_bg/__init__.py", line 53, in segmentAsPascalvoc
    h, w, n = image.shape
AttributeError: 'NoneType' object has no attribute 'shape'
127.0.0.1 - - [15/Feb/2022 22:17:15] "GET /?original=/home/criuser/TÃ©lÃ©chargements/20210728_122019.jpg&background=/home/criuser/TÃ©lÃ©chargements/Tableau_Dashboard.jpg HTTP/1.1" 500 -

Code:

curl "http://127.0.0.1:5000?original=/home/criuser/Téléchargements/20210728_122019.jpg&background=/home/criuser/Téléchargements/Tableau_Dashboard.jpg"

@app.route('/',methods=['GET'])
def API():
    if request.method == 'GET':
        original = request.args.get('original')
        background = request.args.get('background')
        change_bg = alter_bg(model_type="pb")
        change_bg.load_pascalvoc_model("/home/criuser/Téléchargements/xception_pascalvoc.pb")
        result = change_bg.change_bg_img(f_image_path=original,
                                b_image_path=background,
                                output_image_name="/home/criuser/Téléchargements/new.jpg")
        img_base64 = base64.b64encode(result.read())
        return jsonify(img_base64.decode())

CodePudding user response：

Problem is curl, not flask.

It seems curl sends it as latin1 (iso-8859-1) instead of utf-8 so it converts é into Ã© - and later flask has problem to open TÃ©lÃ©chargements (instead of Téléchargements)

Code 'Ã©'.encode('latin1').decode() gives é - so it can confirm that it uses latin1.

This works correctly in curl:

curl -GET 'http://127.0.0.1:5000' --data-urlencode 'original=/home/criuser/Téléchargements/20210728_122019.jpg' --data-urlencode 'background=/home/criuser/Téléchargements/Tableau_Dashboard.jpg'

Original url

http://127.0.0.1:5000?original=/home/criuser/Téléchargements/20210728_122019.jpg&background=/home/criuser/Téléchargements/Tableau_Dashboard.jpg

works correctly (for me) with:

web browser (Firefox, Chrome)
console command wget
console command http (python module httpie)
python module requests
tools to test web page (API) postman, insomnia

but standard module urllib.request has problem with native chars (it encodes with ascii)