此为看完node入门写的小demo,本身完成了一遍，借助的外部模块只要formidable
Node.js的Formidable模块的运用
index.js
const server = require('./server');
const router = require('./router.js');
const requestHandler = require('./requestHandler.js');
var handle = {};
handle['/'] = requestHandler.start;
handle['/start'] = requestHandler.start;
handle['/upload'] = requestHandler.upload;
handle['/show'] = requestHandler.show;
server.start(router.route, handle);server.js
const http = require('http');
const url = require('url');
const start = (route, handle) => {
http.createServer((request, response) => {
let pathname = url.parse(request.url).pathname;
let postData = '';
console.log('request from' + pathname + 'received');
route(handle, pathname, response, request);
}).listen(8888);
}
console.log('server has started');
module.exports = {
start: start
}router.js
const route = (handle, pathname, response, request) => {
console.log('about to route a request for' + pathname);
if(typeof handle[pathname] === 'function') {
handle[pathname](response, request);
}else {
console.log('no request handle found for ' + pathname);
response.writeHead(404, {'Conten-Type': 'text/plain'});
response.write('404 not found');
response.end();
}
}
module.exports = {
route: route
}requestHandler.js
const querystring = require('querystring');
const fs = require('fs');
const formidable = require('formidable');
const start = (response, request) => {
console.log('request handle "start" was called');
let body = `<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<form action="/upload" method="post" enctype="multipart/form-data">
<input type="file" name="upload">
<input type="submit" value="submit">
</form>
</body>
</html>`;
response.writeHead(200, {'Conten-Type' : 'text/html'});
response.write(body);
response.end();
}
const upload = (response, request) => {
console.log('request handle "upload" was called');
let form = new formidable.IncomingForm();
form.uploadDir = './upload/tmp';
form.parse(request, (err, fields, files) => {
console.log('parse done');
let body = `<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<img src="/show" />
</body>
</html>`;
fs.renameSync(files.upload.path, '/tmp/test.png')
response.writeHead(200, {'Content6-Type' : 'text/html'});
response.write(body);
response.end();
})
}
const show = (response) => {
console.log('request handle "show" was called');
fs.readFile('/tmp/test.png', "binary", (err, file) => {
if(err) {
response.writeHead(500, {'Conten-Type' : 'text/plain'});
response.write(err);
response.end();
}else {
response.writeHead(200, {'Conten-Type' : 'image/png'});
response.write(file, "binary");
response.end();
}
})
}
module.exports = {
start: start,
upload: upload,
show: show
}