从Node.js中的Buffer解析multipart / form-data [英] Parse multipart/form-data from Buffer in Node.js

问题描述

我有一个Buffer，我知道这是一个 multipart / form-data 有效负载，我也知道HTTP Content-Type 提前标题，包括边界。

I have a Buffer which I know is a multipart/form-data payload, and I also know the HTTP Content-Type header in advance, which includes the boundary.

有一些模块，例如node-formidable只能在http请求流上运行，所以我感兴趣的是in是如何同步解析多部分有效负载？

There are modules such as node-formidable which work only on http request streams, so what I'm interested in is how to parse a multipart payload synchronously?

推荐答案

查看源代码的 form.parse（） ，您应该能够模仿其内部所做的大部分工作。

Looking at the source for formidable's form.parse(), you should be able to do mimic most of what it's doing internally.

另一种解决方案可能会使用 busboy 之类的内容你要写一个普通的旧解析器流，所以你最终会得到类似的东西：

Another solution might be to use something like busboy which gives you a plain old parser stream to write to, so you might end up with something like:

var Busboy = require('busboy');
var bb = new Busboy({ headers: { 'content-type': '....' } });

bb.on('file', function(fieldname, file, filename, encoding, mimetype) {
  console.log('File [%s]: filename=%j; encoding=%j; mimetype=%j',
              fieldname, filename, encoding, mimetype);
  file.on('data', function(data) {
    console.log('File [%s] got %d bytes', fieldname, data.length);
  }).on('end', function() {
    console.log('File [%s] Finished', fieldname);
  });
}).on('field', function(fieldname, val) {
  console.log('Field [%s]: value: %j', fieldname, val);
}).on('finish', function() {
  console.log('Done parsing form!');
});

bb.end(someBuffer);

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