Submit Form And Upload File With Requests

I'm struggling with submitting a particular form with python requests. Other forms on the site I want to use it work fine and I'm able to submit the login form etc. It's just the f

Solution 1:

Use the files keyword to make your upload, not data. Don't set the content-type header either; the form is posted as multipart form data, and requests should use the correct content type for that for you:

res = s.post(
    url='https://example.com/upload.php',
    data={'upload_type': 'standard', 'upload_to': '0'},
    files=file)

and put the rest of the form fields in a mapping in data.

If you want to upload more than one file under the same name, use a sequence of files:

files = {
    'userfile[]': [
        open('tmp/cover/cover1.jpg', 'rb'),
        open('tmp/cover/cover2.jpg', 'rb'),
    ]
}

res = s.post(
    url='https://example.com/upload.php',
    data={'upload_type': 'standard', 'upload_to': '0'},
    files=files)

Solution 2:

I see two problems with your code:

• You are setting the Content-Type manually. Don't. The library will take care of that. This is esp. because during the multipart form data post, the headers are like: Content-Type: multipart/form-data; boundary=<blah>.
• According the docs, you should be using a files named argument for uploading a file, not data.

Use:

res = s.post(url='https://example.com/upload.php',
            data=<dict containing form params>,
            files=file)