“Bad Gateway” error using Python requests module with multipart encoded file POST

I am getting the error message "Bad Gateway

The proxy server received an invalid
response from an upstream server" with the following code:

import requests

url = "https://apis.company.com/v3/media"
attachments = 'media': ('x.mp3', open('x.mp3', 'r'))}
headers = {'content-type': "multipart/form-data",'cache-control': "no-cache"
'Authorization':"Bearer zzz" }
response = requests.post(url, files=attachments, headers = headers)
print response.text


I'm following the example in the requests Quickstart documentation, where it says "You can also pass a list of tuples to the data argument": http://docs.python-requests.org/en/master/user/quickstart/#post-a-multipart-encoded-file

What is causing this error and how can I fix it?

data

files

1 Answer
1

The main problem was that I set the content-type in the header. This code works:

import requests

url = 'https://apis.company.com/v3/media'
token = 'token-goes-here'

headers = { 'Authorization' : 'Bearer ' + token }

filename = 'x.mp3'

with open(filename, 'rb') as media_file:

attachments = {
'media': (filename, media_file, 'application/octet-stream')
}

response = requests.post(url, files = attachments, headers = headers)

print response.text


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