项目中用到的node-express模块

反向代理中间件：

var proxyMiddleWare = require("http-proxy-middleware");

var proxyPath = "http://mobilecdn.kugou.com"; //目标后端服务地址，被反向代理的第三方api，通过中间件转发实现在自己的项目中跨域访问第三方资源。

var proxyOption = { target: proxyPath, changeOrigin: true };

app.use("/yy", proxyMiddleWare(proxyOptionhash));/yy代表匹配路由，目标地址下匹配到该路由后实行转发

 

 

允许跨域访问设置：

app.all('*', function(req, res, next) {//*代表允许所有请求跨域访问

res.header("Access-Control-Allow-Origin", "*")

res.header('Access-Control-Allow-Methods', 'PUT, GET, POST, DELETE, OPTIONS')

res.header("Access-Control-Allow-Headers", "X-Requested-With")

res.header('Access-Control-Allow-Headers', 'Content-Type')

next()

})

 

 

访问静态资源文件：

var app = express();

var path = require('path');//路径解析模块

var fs = require('fs');//文件读取模块

app.use(express.static(path.resolve(__dirname, './dist')))

app.get('/', function(req, res) {

const html = fs.readFileSync(path.resolve(__dirname, './dist/index.html'), 'utf-8')

res.send(html)

})

 

图片上传处理模块：

var formidable = require("formidable");

var form = new formidable.IncomingForm(); //创建上传表单

form.encoding = 'utf-8'; //设置编辑

form.uploadDir = 'public/images/'; //设置上传目录

form.keepExtensions = true; //保留后缀

form.maxFieldsSize = 2 * 1024 * 1024; //文件大小

form.parse(req, function(err, fields, files) {

if (err) {

res.locals.error = err;

res.render('index', { title: TITLE });

return;

}

console.log(files.upimg.name)

var extName = ''; //后缀名

switch (files.upimg.type) {

case 'images/jpeg':

extName = 'jpg';

break;

case 'image/jpeg':

extName = 'jpg';

break;

case 'image/png':

extName = 'png';

break;

case 'image/x-png':

extName = 'png';

break;

// default:

// extName='unknow'

}

if (extName.length == 0) {

res.locals.error = '只支持png和jpg格式图片';

res.render('index', { title: TITLE });

return;

}

// var avatarName = Math.random() + '.' + extName;

//图片写入地址；

var newPath = form.uploadDir + files.upimg.name;

//显示地址；

// var showUrl = domain + '/images/' + avatarName;

console.log("newPath", newPath);

fs.renameSync(files.upimg.path, newPath); //重命名

res.json({

"newPath": newPath

});

});