Twitter API:媒体/上传 400 错误请求:媒体类型无法识别 [英] Twitter API: media/upload 400 Bad Request: media type unrecognized

问题描述

所以我有一个网站，用户可以在其中上传图像文件(我一直在使用 113KB PNG 文件进行测试).点击提交按钮后，图像数据被编码为 base64，然后以 POST 请求正文中的 JSON 格式发送到托管在 heroku 上的 node.js 服务器.然后服务器获取图像数据并解析 JSON.然后，我使用节点模块 twitter 从 heroku 服务器向 media/upload 端点发出 POST 请求.我尝试使用它来发布有效的常规状态，因此这不是身份验证问题.在 twitter 模块文档的示例中，他们这样做(原始二进制文件，而不是 base64):

So I've got a website where a user uploads an image file (I've been testing with a 113KB PNG file). After hitting the submit button, the image data gets encoded into base64 and then is sent to a node.js server hosted on heroku in a JSON in the body of the POST request. The server then takes the image data and parses the JSON. Then, I make a POST from the heroku server to the media/upload endpoint using the node module, twitter. I've tried using it to post a regular status which worked, so it's not an authentication problem. In the example on the twitter module's documentation, they do this (raw binary, not base64):

var data = require('fs').readFileSync('image.jpg');
client.post('media/upload', {media: data}, function(error, media, response) { ... }

但是，按照我的做法，我实际上无法读取文件——我所拥有的只是来自 JSON 字符串的编码数据.无论如何，这就是我所拥有的:

However, the way I'm doing it, I can't actually read a file -- all I've got is the encoded data from the JSON string. Anyway, here's what I've got:

...
let data = JSON.parse(req.rawBody).imageb64;
//console.log(data);
client.post('media/upload', {media_data: data}, function(error, media, response) {

  if (!error) {
    console.log(media);
    var status = {
      status: 'api test',
      media_ids: media.media_id_string
    }

    client.post('statuses/update', status, function(error, tweet, response) {
      if (!error) {
        console.log(tweet);
      }
    });

  }  else {
    console.log(response)
  }
});

我怀疑问题是因为我传入的是数据而不是 readFileSync 的结果.关于如何在不使用它的情况下做到这一点的任何想法?

I suspect the problem is because I'm passing in the data rather than the result of readFileSync. Any ideas on how I can do this without using it?

推荐答案

可能有帮助的文档:

发布 base64 编码的图片时，请务必在邮件的图片部分设置Content-Transfer-Encoding: base64".

When posting base64 encoded images, be sure to set the "Content-Transfer-Encoding: base64" on the image part of the message.

API 文档不是最好的.示例中有 media_type 但要确定:

The API docs aren't the best. There's a media_type in the examples but to be sure:

• client.post 在 twitter.js 使用 params
调用 __request
• __request 是否不设置标题

• client.post in twitter.js calls __request with the params
• __request does not set a the header

如果您将 post 调用中的参数从 {media_data: data} 更改为 {media: data}，它会起作用吗?如果没有，似乎设置标题的唯一方法是打开 PR 或尝试在初始化客户端时将它们提供为默认值:Twitter(options).此处已经设置了一些标题.

Does it work if you change the params in your call to post from {media_data: data} to {media: data}? If not, it seems like the only way to set the headers would be either open a PR or to try providing them as the default when you initialize the client: Twitter(options). There are already some headers set here.

仅供参考 - 我已经为您打开了一个 GitHub 问题.加入对话！https://github.com/desmondmorris/node-twitter/issues/292

FYI - I've opened a GitHub issue for you. Join the conversation! https://github.com/desmondmorris/node-twitter/issues/292

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