這篇文章主要為大家展示了“Node.js怎么實現(xiàn)文本提交與顯示方法”,內(nèi)容簡而易懂,條理清晰,希望能夠幫助大家解決疑惑,下面讓小編帶領(lǐng)大家一起研究并學(xué)習(xí)一下“Node.js怎么實現(xiàn)文本提交與顯示方法”這篇文章吧。
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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; server.start(router.route, handle);
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() { console.log("data received ending" + pathname); route(handle, pathname, response, postData); }); } http.createServer(onRequest).listen(8888); console.log("Server has started."); } exports.start = start;
requestHandlers.js
var querystring = require("querystring"); 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 sent the text: "+ querystring.parse(postData).text); response.end(); } exports.start = start; exports.upload = upload;
router.js
function route(handle, pathname, response, postData) { console.log("About to route a request for " + pathname); if (typeof handle[pathname] === 'function') { 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;
result:
知識點:
require和exports的用法:
index.js中代碼
var Hello = require('.hello'); hello = new Hello(); hello.setName('Joey'); hello.sayHello();
hello.js中代碼
function Hello(){ var name; this.setName = function(thyName){ name = thyName; } this.sayHello = function(){ console.log('Hello ' + name); } } //exports.Hello = Hello; //此時我們在其他文件中需要通過 require('./hello').Hello來獲取Hello對象,這種寫法有點冗余 module.exports = Hello; //輸出的就是Hello對象本身,不是上面的exports,上面的是暴露.Hello,.Hello賦予了Hello對象
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當(dāng)前名稱:Node.js怎么實現(xiàn)文本提交與顯示方法-創(chuàng)新互聯(lián)
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