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server.js
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server.js
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var http = require('http');
var fs = require('fs');
var path = require('path');
var mime = require('mime');
var cache = {};
var chatServer = require('./lib/chat_server');
// 提供静态http文件服务
function send404(response) {
response.setHeader('Access-Control-Allow-Origin', '*');
response.setHeader("Access-Control-Allow-Headers", "Content-Type,Content-Length, Authorization, Accept,X-Requested-With");
response.setHeader("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
response.writeHead(404, { 'Content-Type': 'text/plain' });
response.write('Error 404: resource not found');
response.end();
}
function sendFile(response, filePath, fileContents) {
response.setHeader('Access-Control-Allow-Origin', '*');
response.setHeader("Access-Control-Allow-Headers", "Content-Type,Content-Length, Authorization, Accept,X-Requested-With");
response.setHeader("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
response.writeHead(200, { 'Content-Type': mime.lookup(path.basename(filePath)) });
response.end(fileContents);
}
function serverStatic(response, cache, absPath) {
if (cache[absPath]) {
sendFile(response, absPath, cache[absPath]);
} else {
fs.exists(absPath, function (exists) {
if (exists) {
fs.readFile(absPath, function (err, data) {
if (err) {
send404(response);
} else {
cache[absPath] = data;
sendFile(response, absPath, data);
}
})
} else {
send404(response);
}
})
}
}
var server = http.createServer(function (request, response) {
var filePath = false;
if (request.url == '/') {
filePath = 'public/index.html';
} else {
filePath = 'public' + request.url;
}
var absPath = './' + filePath;
serverStatic(response, cache, absPath);
})
server.listen(3000, function () {
console.log('Server listening on port 3000');
})
// 跟http服务器共享一个TCP/IP端口
chatServer.listen(server);