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再撸一次简单的NODE.JS

2015-12-20 913

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简介： 这毕竟大势所趋，了解一下无防的。最终，对JS的要求还是有点高。。。以后弄过一次，很快就忘了。再来再拾起来一下。 server.js var http = require("http"); var url = require("url"); function start(r...

这毕竟大势所趋，了解一下无防的。

最终，对JS的要求还是有点高。。。

以后弄过一次，很快就忘了。

再来再拾起来一下。

server.js

var http = require("http");
var url = require("url");

function start(route, handle) {
  function onRequest(request, response){
    var postData = "";
    var pathname = url.parse(request.url).pathname;
    console.log("Request for " + pathname + " received.");
    request.setEncoding("utf8");
    request.addListener("data", function(postDataChunk){
      postData += postDataChunk;
      console.log("Received POST data chunk '" +
        postDataChunk + "'.");
    });
    request.addListener("end", function(){
      route(handle, pathname, response, postData);
    });
  }
  http.createServer(onRequest).listen(8888);
  console.log("server start listen at port 8888!");
}

exports.start = start;

router.js

function route(handle, pathname,response, postData) {
  console.log("About to route a request for " + pathname);
  if (typeof handle[pathname] === 'function') {
    return handle[pathname](response, postData);
  } 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;

requestHandlers.js

var querystring = require("querystring");
fs = require("fs");

function start(response, postData) {
  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" method="post">'+
            '<textarea name="text" rows="20" cols="60"></textarea>'+
            '<input type="submit" value="Submit text" />'+
            '</form>'+
            '</body>'+
            '</html>';

    response.writeHead(200, {"content-Type": "text/html"});
    response.write(body);
    response.end();
}

function upload(response, postData) {
  console.log("Request handler 'upload' was called.");
  response.writeHead(200, {"content-Type": "text/plain"});
  response.write("You've send: " +
    querystring.parse(postData).text);
  response.end();
}

function show(response, postData) {
  console.log("Request handler 'show' was called.");
  fs.readFile("GH2.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("./router");
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);

输出图：

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