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);
}Related recommendations:
jQuery implements preview function before uploading image files
Implementation examples of common file upload functions in php web pages
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