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node學(xué)習(xí)系列之簡(jiǎn)單文件上傳

Achilles 發(fā)布于2019-08-22 10:40 / 2845人閱讀

摘要：此為看完入門寫的小自己實(shí)現(xiàn)了一遍，借助的外部模塊只有的模塊的使用原代碼倉(cāng)庫

此為看完node入門寫的小demo,自己實(shí)現(xiàn)了一遍，借助的外部模塊只有formidable
Node.js的Formidable模塊的使用

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 = `
                
                    
                    Document
                
                
                    
                        
                        
                    
                
                `;
    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 = `
                    
                        
                        Document
                    
                    
                    
                    
                    `;
        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
}

原代碼倉(cāng)庫

learn-node/upload