var net = require('net'), http = require('http'), url = require('url'), fs = require('fs'); var DEFAULT_PORTS = { 'http:': 80, 'https:': 443 }; var INDEX_TPL = fs.readFileSync('index.html'); function _write(str, res, content_type) { if(res.jsonp_cb) { str = res.jsonp_cb + '("' + str + '")'; } res.writeHead(200, { 'Content-Length': str.length, 'Content-Type': content_type || 'text/plain' }); res.end(str); }; function expand(short_url, res) { var info = url.parse(short_url); // console.log('info: ' + JSON.stringify(info)); if(info.protocol != 'http:') { // 无法请求https的url? _write(short_url, res); return; } var client = http.createClient(info.port || DEFAULT_PORTS[info.protocol], info.hostname); var path = info.pathname || '/'; if(info.search) { path += info.search; } var headers = { host: info.hostname, 'User-Agent': 'NodejsSpider/1.0' }; var request = client.request('GET', path, headers); request.end(); request.on('response', function (response) { if(response.statusCode == 302 || response.statusCode == 301) { expand(response.headers.location, res); } else { _write(short_url, res); } }); }; //expand('http://sinaurl.cn/hbMUII'); // http服务 http.createServer(function(req, res){ if(req.url.indexOf('/api?') == 0) { var params = url.parse(req.url, true); if(params.query && params.query.u) { if(params.query.cb) { // 支持jsonp跨域请求 res.jsonp_cb = params.query.cb; } expand(params.query.u, res); } else { _write('', res); } } else { _write(INDEX_TPL, res, 'text/html'); } }).listen(1235); process.on('uncaughtException', function (err) { console.log('Caught exception: ' + err); });