一:代码:

 

1.1 入口文件: index.js

 1 var server          = require('./server');
 2 var router          = require("./router");
 3 var requestHandlers = require("./requestHandlers");
 4 
 5 var handle        = {};
 6 handle["/"]       = requestHandlers.start;
 7 handle["/start"]  = requestHandlers.start;
 8 handle["/upload"] = requestHandlers.upload;
 9 handle["/show"]   = requestHandlers.show;
10 
11 server.start(router.route, handle);

 

1.2 服务器文件: server.js

 1 var http = require("http");
 2 var url = require("url");
 3 
 4 
 5 function start(route, handle){
 6     http.createServer(function(request, response) {
 7 
 8         // console.log(url.parse(request.url));
 9         // console.log(url.parse(request.url).query);
10         var pathname = url.parse(request.url).pathname;
11         console.log('request for [' +pathname+ "] received.");
12 
13         //接收请求数据:
14         var postData = "";
15         request.setEncoding("utf8");
16 
17 
18         request.on("data", function(chunk){
19             postData += chunk;
20             console.log("Received POST data chunk '" +chunk+"'");
21         });
22 
23         request.on("end", function(){
24             route(handle, pathname, response, postData);
25         });
26 
27 
28     }).listen(8888);
29 
30     console.log("server has started.");
31 }
32 
33 exports.start = start;

 

 

1.3 路由文件: router.js

 1 function route(handle, pathname, response, postData){
 2     console.log("About to route a request for " +pathname);
 3 
 4     if (typeof handle[pathname] === 'function') {
 5         //调用函数:
 6         handle[pathname](response, postData);
 7     } else{
 8         console.log("No request handler found for " + pathname);
 9         response.writeHead(404, {"Content-Type": "text/plain"});
10         response.write("404 Not found");
11         response.end();
12     }
13 }
14 
15 exports.route = route;

 

 

1.4 请求处理程序文件: requestHandles.js

 1 var querystring = require("querystring");
 2 var fs = require("fs");
 3 
 4 function start(response, postData) {
 5   console.log("Request handler 'start' was called.");
 6 
 7   var body = '<html>'+
 8     '<head>'+
 9     '<meta http-equiv="Content-Type" content="text/html; '+
10     'charset=UTF-8" />'+
11     '</head>'+
12     '<body>'+
13     '<form action="/upload" method="post">'+
14     '<input type="text" value="" name="userName"/>'+
15     '<textarea name="text" rows="20" cols="60"></textarea>'+
16     '<input type="submit" value="Submit text" />'+
17     '</form>'+
18     '</body>'+
19     '</html>';
20 
21     response.writeHead(200, {"Content-Type": "text/html"});
22     response.write(body);
23     response.end();
24 }
25 
26 
27 function upload(response, postData) {
28   console.log("Request handler 'upload' was called.");
29   response.writeHead(200, {"Content-Type": "text/plain"});
30   response.write("You've sent allData: " +querystring.parse(postData)+ "\n");
31   response.write("You've sent userName: " +querystring.parse(postData).userName+ "\n");
32   response.write("You've sent text: " +querystring.parse(postData).text+ "\n");
33   response.end();
34 }
35 
36 
37 function show(response, postData){
38     console.log("Request handle 'show' was called.");
39     var filename = "C:/Users/dc5yy/Desktop/图片_1/06.jpg";
40     fs.readFile(filename, "binary", function(error, file){
41         if (error) {
42             response.writeHead(500, {"Content-Type": "text/plain"});
43             response.write(error + "\n");
44             response.end();
45         } else{
46             response.writeHead(200, {"Content-Type": "image/jpg"});
47             response.write(file, "binary");
48             response.end();
49         }
50     });
51 }
52 
53 exports.start  = start;
54 exports.upload = upload;
55 exports.show   = show;

 

1.5 结果:

 

1)要读取的图片 地址:

var filename = "C:/Users/dc5yy/Desktop/图片_1/06.jpg";

 

2) 启动服务器:

 

3) http访问:

 

 

 

1.6 参考链接:

　　nodejs 入门