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koa-multipart

v0.0.1

Published

koa2 解析 multipart/form-data 数据。

Downloads

13

Readme

multipart

一个基于multiparty实现的 koa2 的解析 multipart/form-data (文件上传)的内容解析器。

安装

npm install koa-multipart

使用

let Koa = require('koa');
let multipart = require('koa-multipart');

let app = new Koa();
let.use(multipart());

let.use(async (ctx) => {
  // 解析后的请求内容将存放到 ctx.request.body 上
  // 如果没有解析到对应的请求,则 body 将是 undefined
  ctx.body = ctx.request.body;
});

每一次解析到文件时,都会将文件保存到 uploadDir 配置的路径上。解析完成后,会将解析到的文件和字段数据放入 ctx.request.body,格式如下:

ctx.request.body = {
  files: [{……}],
  fields: {}
}
  • files: 所有的文件信息 file, file 是一个对象,存放的是文件的基本信息:
    • fieldName: 上传文件时传递的 name 字段
    • originalName: 上传的文件名
    • path: 上传后文件保存到服务器时的路径
  • fields: 解析到的所有的普通字段数据

参数说明

multipart(opts)
  • uploadDir: function(obj),返回文件的保存路径;默认为
    path.join('/', md5(filenamePre + Date.now()) + suffix)
    参数obj是一个对象,包含有以下字段:
    • name: 上传文件的 name 字段
    • filename: 上传的文件名称, 例如:login.jpg
    • filenamePre: 文件名称(不带后缀),例如:login
    • suffix: 文件后缀,例如:.jpg