Falcon: req.stream.read(), the new file include the WebKitFormBoundary header, it makes my file corrupt

[Alfreddatui]

this is my falcon code:

def on_post(self, req, resp, email):
    local_path = create_local_path(req.url, req.content_type)
    with open(local_path, 'wb') as temp_file:
        body = req.stream.read()
        temp_file.write(body)

and the function of create_local_path is to make local_path become a directory_path/filename.ext
And after I checked the new file, it always corrupt. I realize that there is webkitformboundary header after I change the extension of the file to .txt

Do you have any idea how to get this without the header?

For more information, this is the header:

------WebKitFormBoundaryTP8DZAf3SJOvwXWy
Content-Disposition: form-data; name="file"; filename="jpg5.jpg"
Content-Type: image/jpeg

[kgriffs]

Hi @Alfreddatui, it looks like the server is receiving a multipart/form-data body.

Falcon does not currently support parsing files submitted by an HTTP form (multipart/form-data), although we do plan to add this feature in a future version. In the meantime, you can use the standard cgi.FieldStorage class to parse the request:

# TODO: Either validate that content type is multipart/form-data
# here, or in another hook before allowing execution to proceed.

# This must be done to avoid a bug in cgi.FieldStorage
env = req.env
env.setdefault('QUERY_STRING', '')

# TODO: Add error handling, when the request is not formatted
# correctly or does not contain the desired field...

# TODO: Consider overriding make_file, so that you can
# stream directly to the destination rather than
# buffering using TemporaryFile (see http://goo.gl/Yo8h3P)
form = cgi.FieldStorage(fp=req.stream, environ=env)

file_item = form[name]
if file_item.file:
    # TODO: It's an uploaded file... read it in
else:
    # TODO: Raise an error

You might also try this streaming_form_data package by Siddhant Goel.

[Alfreddatui]

Thanks!
Such an honour to be replied by the highest contributor of falcon.

Best Regards,
Alfred

[Alfreddatui]

Hi, thank you for your help

I manage to get the data without the header by sending the data using object instead of formData. So using req.stream.read() will only read the data without the header.