Examples to explain thinkjs file upload function

This article mainly introduces the thinkjs file upload function to you. ThinkJS is a Node.js framework for future development. It integrates a large number of project best practices to make enterprise-level development so simple and efficient. Next, I will share with you the thinkjs file upload function through this article. Friends who need it can refer to it. I hope it can help everyone.

Features

• Based on Koa 2.x, compatible with middleware

• The kernel is compact and supports plug-in methods such as Extend and Adapter

• Excellent performance and high unit test coverage

• Built-in automatic compilation and automatic update mechanism to facilitate rapid development

• Use more elegant async/await to handle asynchronous issues, no longer support */yield

• Support TypeScript starting from 3.2

Architecture

thinkjs is a nodejs-based mvc framework produced by 360 Company. This article uses thinkjs to write the backend. The specific code is as follows:

let formdata = new FormData($('form')[0]);
  $('#fileUpload').submit(function (e) {
    e.preventDefault();
    var data = new FormData($(this)[0]);
    $.ajax({
      url: '/themestore/upload/theme',
      type: 'POST',
      data: data,
      async: false, //发送同步请求（默认为TRUE）
      cache: false, //不同浏览器缓存中加载请求信息（默认为true）
      contentType: false, //内容编码格式
      processData: false,
/*要求为Boolean类型的参数，默认为true。默认情况下，发送的数据将被转换为对象（从技术角度来讲并非字符串）以配合默认内容类型"application/x-www-form-urlencoded"。如果要发送DOM树信息或者其他不希望转换的信息，请设置为false。*/
      success:function (res) {
        if(!res.errno) alert('上传成功！');
        else alert('上传失败，请重试！');
      }
    });
  });

Description: async : false, cache: false, contentType: false, processData: false, need to be written.

In addition, the values ​​corresponding to each form item in the formdata object must be viewed using its own get method.

eg: data.get('file') //The parameter of get is the name of the form element.

async themeAction(){
  let themefile = this.file('themename');
  let filepath = themefile.path;//为防止上传的时候因文件名重复而覆盖同名已上传文件，path是MD5方式产生的随机名称
  let uploadpath = think.RESOURCE_PATH + '/static/theme';
  think.mkdir(uploadpath);//创建该目录
  //提取出用 ‘/' 隔开的path的最后一部分。
  //let basename = path.basename(filepath);
  let basename = themefile.originalFilename;//因为本系统不允许上传同名主题，所以文件名就直接使用主题名
  //将上传的文件（路径为filepath的文件）移动到第二个参数所在的路径，并改为第二个参数的文件名。
  fs.renameSync(filepath, uploadpath + '/' + basename);
  themefile.path = uploadpath + '/' + basename;
  //读取压缩文件信息存数据库
  let zip = new JSZip();
  this.success(themefile);
 }

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