我做的这台代理服务器作为网关，把来自公网客户端的请求通过http转发到内部的连天服务器，但在开发阶段由于客户端发送带未转义的双引号，换行符等字符，导致聊天服务器解析json数据包出错，从而未响应我的网关服务器。

我于是设置了请求超时，和错误事件处理，以结束客户端的请求。但即使这样，node写的网关服务器还是经常被挂起，即进程和端口一直在，但就是不能再响应来自客户端的请求了，最后返回server no reult。初次使用nodejs写，没有系统学习过，请大神帮忙看看我这代码有啥问题。

<pre class=“prettyprint language-javascript”> <code> process.on(‘uncaughtException’, function (err) { console.log('Caught exception: ’ + err); });

var config=require(’./config.json’); if(config){ for(var k in config){ console.log(k+’:’+config[k]); } } var LOCAL_PORT = config.localPort || 1337; var REMOTE_PORT = config.mailchatServerPort || 7777; var REMOTE_ADDR = config.mailchatServer || ‘10.25.2.17’;

var log4js = require(‘log4js’); log4js.configure({ appenders: [ { type: ‘console’ }, //{ type: ‘file’, filename: ‘logs/cheese.log’, category: ‘cheese’ }, { type: ‘dateFile’, filename: ‘info.log’, pattern: ‘-yyyy-MM-dd’, alwaysIncludePattern: false, category: ‘dateFileLog’ } ], replaceConsole:true, levels:{ dateFileLog: ‘INFO’ } });

var log = log4js.getLogger(‘dateFileLog’);

http = require(‘http’); http.createServer(onRequest).listen(LOCAL_PORT); log.info('Gateway Server listen at ’ + LOCAL_PORT + ‘.’);

function onRequest(client_req, client_res) { if(client_req.url.indexOf(’/favicon.ico’)==0) return; log.info(‘Request URL: ’ + client_req.url); log.info(‘Request Header: ’ + JSON.stringify(client_req.headers)); var options = { hostname: REMOTE_ADDR, port: REMOTE_PORT, path: client_req.url, method: client_req.method, headers: client_req.headers }; client_res.setHeader(‘Content-type’,‘application/json’); client_res.setHeader(‘Access-Control-Allow-Origin’,’*’); var proxy = http.request(options, function (res) { log.info('From ChatServer STATUS: ’ + res.statusCode); log.info('From ChatServer HEADERS: ’ + JSON.stringify(res.headers)); res.setEncoding(‘UTF8’); res.pipe(client_res, { end: true }); });

proxy.on(‘error’, function(e) { log.info('Problem with request from ChatServer: ’ + e.message); client_res.statusCode=500; client_res.end(); //client_res.end('cache server error: '+e.message); });

proxy.setTimeout(10*1000, function(){ log.info(‘Request Timeout From ChatServer in 10 seconds, then response code 500’); client_res.statusCode=500; client_res.end(); //client_res.end(‘Reuqest Timeout’); });

client_req.setTimeout(10*1000, function(){ log.info(‘Timeout’); client_res.statusCode=500; client_res.end(); });

client_req.pipe(proxy, { end: true });

} </code> </pre>