node上传文件到本地
2020-01-05 本文已影响0人
五四青年_4e7d
js文件
var http=require("http");
var fs=require("fs");
http.createServer(function(req,res){
res.writeHead(200,{"Content-type":"text/html;charset=UTF-8","Access-Control-Allow-Origin":"*"});
if (req.method.toLowerCase()=="post") {
//新建一个空数组接受流的信息
var chunks=[];
//获取长度
let num=0;
req.on("data",function(chunk){
chunks.push(chunk);
num+=chunk.length;
});
req.on("end",function(){
//最终流的内容本体
var buffer=Buffer.concat(chunks,num);
//新建数组接收出去\r\n的数据下标
let rems=[];
//根据\r\n分离数据和报头
for (var i = 0; i < buffer.length; i++) {
let v=buffer[i];
let v2=buffer[i+1];
// 10代表\n 13代表\r
if (v==13&&v2==10) {
rems.push(i)
}
}//for
//获取上传图片信息
let picmsg_1 = buffer.slice(rems[0]+2,rems[1]).toString();
console.log(picmsg_1);
let filename = picmsg_1.match(/filename=".*"/g)[0].split('"')[1];
console.log(filename);
//图片数据
var nbuf = buffer.slice(rems[3]+2,rems[rems.length-2]);
let address="./"+filename;
//创建空文件并写入内容
fs.writeFile(address,nbuf,function(err){
if (err) {
console.log(err);
}else{
console.log("创建成功")
}
})
})
res.end('成功');
}
}).listen(3000,"localhost")
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<form action="http://localhost:3000/images" method="POST" enctype="multipart/form-data">
<input type="file" name="file"><br/>
<input type="submit" value="上传"/>
</form>
</body>
</html>
