Facebook Messenger API:“无法从url提取文件"文件存在时 [英] Facebook Messenger API: "Failed to fetch the file from the url" when the file exists

问题描述

我目前正在尝试使用Facebook Messenger发送API将托管图像作为附件发送.我发出了类似以下的POST请求:

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}}

当我使用浏览器访问给定的URL时，它将显示图像.但是，API始终返回错误:

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'}}

如何解决此错误?任何帮助，我们将不胜感激！

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

推荐答案

对于以后可能会迷惑于此问题的人，我设法找出了问题的根源. Messenger附件有一个内置的文件限制，该图像(2MB)覆盖了该图像.重试较小的图像成功.但是，不幸的是，Messenger文档没有指定限制，所以这取决于猜测！

For people who may stumble on this question later, I managed to work out the source of the issue. There is an inbuilt file limit for Messenger attachments, and this image (2MB) was over it. Retrying with a smaller image was successful. However, the Messenger documentation unfortunately does not specify the limit, so it's down to guesswork!

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