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nodejs上传图片并展示

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服务模块  

    var http = require("http");

    var url = require("url");

    

    function start(route,handle){

     function onRequest(request,response){

     var pathname = url.parse(request.url).pathname;

     if (pathname != "/favicon.ico") {

     console.log("Request for" + pathname + " received");

     route(handle,pathname,response,request);

     }

     }

    

     http.createServer(onRequest).listen(8888);

     console.log("Server has started");

    }

    

    exports.start = start;

路由模块

    function 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 handler found for " + pathname);

     response.writeHead(404,{"Content-Type":"text/plain"});

     response.write("404 not found");

     response.end();

     }

    }

    

    exports.route = route;

请求处理模块

    var querystring = require("querystring"),

        fs = require("fs"),

        formidable = require("formidable");

    

    function start(response) {

      console.log("Request handler ‘start‘ was called.");

    

      var body = ‘<html>‘+

        ‘<head>‘+

        ‘<meta http-equiv="Content-Type" content="text/html; ‘+

        ‘charset=UTF-8" />‘+

        ‘</head>‘+

        ‘<body>‘+

        ‘<form action="/upload" enctype="multipart/form-data" ‘+

        ‘method="post">‘+

        ‘<input type="file" name="upload" multiple="multiple">‘+

        ‘<input type="submit" value="http://www.mamicode.com/Upload file" />‘+

        ‘</form>‘+

        ‘</body>‘+

        ‘</html>‘;

    

        response.writeHead(200, {"Content-Type": "text/html"});

        response.write(body);

        response.end();

    }

    

    function upload(response, request) {

      console.log("Request handler ‘upload‘ was called.");

    

      var form = new formidable.IncomingForm();

      console.log("about to parse");

      form.parse(request, function(error, fields, files) {

        console.log("parsing done");

        var readStream = fs.createReadStream(files.upload.path);

        var writeStream=fs.createWriteStream("./tmp/test.png");

        readStream.pipe(writeStream);

        readStream.on(‘end‘,function(){ 

        fs.unlinkSync(files.upload.path); 

        }); 

        response.writeHead(200, {"Content-Type": "text/html"});

        response.write("received image:<br/>");

        response.write("<img src=http://www.mamicode.com/‘/show‘ />");

        response.end();

      });

    }

    

    function show(response) {

      console.log("Request handler ‘show‘ was called.");

      fs.readFile("./tmp/test.png", "binary", function(error, file) {

        if(error) {

          response.writeHead(500, {"Content-Type": "text/plain"});

          response.write(error + "\n");

          response.end();

        } else {

          response.writeHead(200, {"Content-Type": "image/png"});

          response.write(file, "binary");

          response.end();

        }

      });

    }

    

    exports.start = start;

    exports.upload = upload;

    exports.show = show;

index.js

    var server = require("./server");

    var router = require("./route");

    var requestHandlers = require("./requestHandlers");

    

    var handle = {};

    handle["/"] = requestHandlers.start;

    handle["/start"] = requestHandlers.start;

    handle["/upload"] = requestHandlers.upload;

    handle["/show"] = requestHandlers.show;

    

    server.start(router.route,handle);

访问:http://localhost:8888/start


本文出自 “素颜” 博客,请务必保留此出处http://suyanzhu.blog.51cto.com/8050189/1894091

nodejs上传图片并展示