'Facebook Messenger API: "Failed to fetch the file from the url" when the file exists

I am currently attempting to send a hosted image as an attachment using the Facebook Messenger Send API. I make a POST request like the following:

{"message": {"attachment": {"payload": {"url": "http://url.com/image"},
                            "type": "image"}},
 "recipient": {"id": 129760000000000}}

When I access the given URL using a browser, it displays the image. However, the API always returns an error:

{'error': {'code': 100,
           'type': 'OAuthException',
           'fbtrace_id': 'GlCkjxuGMw0',
           'error_subcode': 2018008,
           'message': '(#100) Failed to fetch the file from the url'}}

How can I fix this error? Any help is very appreciated!

facebook facebook-messenger

Solution 1:^[1]

I had the same problem, my facebook bot was in flask python and solved it by adding "threaded=True" to my app.run.

if name == 'main': app.run(host='127.0.0.1', port=5000, debug=True, threaded=True)

Solution 2:^[2]

This error happens also if the file name or the attachment has spaces.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Jose Angel Lopez
Solution 2	Federico Schiocchet

'Facebook Messenger API: "Failed to fetch the file from the url" when the file exists

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]