Facebook bot -Manipular url de Imagens E Arquivos Anexados
将Facebook聊天中的媒体类型发送到具有机器人的页面时，我会得到以下响应：
"recipient":{
sender: { id: 'xxxx' },
recipient: { id: 'xxxx' },
timestamp: xxx,
},
"message":{
"attachment":{
"type":"image",
"payload":{
"url":"https://lookaside.fbsbx.com/ig_messaging_cdn/?asset_id=2608864215911984&signature=AbykSEBb24Mq3HE0VzWv_XLb9klY3_7hiZauQp_DxjPbHGbEz_-N4r7Rf_7dxNM2v3yzzy0sIGvKFuiFxvCrvVAybrBa5omgAADBhtHnJMJk3TMqGnmrlIa5mmnaJ1nfQSFT1q0hQrTyVzl81gxGEOEl5AFwzVINKWeY_J-_0Oxb1qxHOrjnUgdFQNS_rGLa4QiNs0wkRk9OXOHlVtEy5sFxUqPY7Q"
}
}
}
}
如何获得文件名 + MIME类型？还是如何通过此类型的URL下载此文件？
我尝试下载，但文件已损坏
When sending a media type in facebook chat to a page that has a bot, I get the following response:
"recipient":{
sender: { id: 'xxxx' },
recipient: { id: 'xxxx' },
timestamp: xxx,
},
"message":{
"attachment":{
"type":"image",
"payload":{
"url":"https://lookaside.fbsbx.com/ig_messaging_cdn/?asset_id=2608864215911984&signature=AbykSEBb24Mq3HE0VzWv_XLb9klY3_7hiZauQp_DxjPbHGbEz_-N4r7Rf_7dxNM2v3yzzy0sIGvKFuiFxvCrvVAybrBa5omgAADBhtHnJMJk3TMqGnmrlIa5mmnaJ1nfQSFT1q0hQrTyVzl81gxGEOEl5AFwzVINKWeY_J-_0Oxb1qxHOrjnUgdFQNS_rGLa4QiNs0wkRk9OXOHlVtEy5sFxUqPY7Q"
}
}
}
}
how can i get the filename + the mime type? or how can I download this file by this type of url?
I tried to download but the file is corrupted
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attactment.payload.url属性中的URL可公开访问。因此，您可以下载文件服务器端。由于您只需要找出文件名和MIME类型，因此只能执行 head请求由于您需要的所有数据都在标题中，尤其是对于此文件：（使用
curl -i获得），请注意，您可能不会收到原始的原始文件名，因为此信息未从Facebook的CDN提供。如果这是一个文件，您可以通过附件上传api ，您可以从上传时提供的URL推断文件名。
The URL in
attachment.payload.urlproperty is publicly accessible. Therefore, you can download the file server-side. Since you only need to find out the filename and MIME type, you can perform only a HEAD request since all data you need are in the headers, notably, for this file:(Obtained with
curl -I)Mind that you probably won't receive the original filename, as this information is not provided from Facebook's CDN. If this is a file you uploaded via the attachment upload API, you could infer the filename from the URL provided on upload.