NodeJS中实现JSONP
var http = require('http'); var url = require('url'); var port = process.env.port || 1337; var data ={"card":"2","user" : {"name": "Irving", "age": "24"},"numbers":{"Conway":[1,11,21,1211,111221,312211],"Fibonacci":[0,1,1,2,3,5,8,13,21,34]}}; http.createServer(function(req, rep){ var params = url.parse(req.url, true); console.log(params); if (params.query && params.query.callback) { console.log(params.query.callback); //jsonp var str = params.query.callback + '(' + JSON.stringify(data) + ')'; rep.end(str); }else{ rep.end(JSON.stringify(data)); } }).listen(port, function(){ console.log('server is listening on port ' + port); })
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Test NodeJS JSONP</title> <script src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript"> $(function () { $("#test").click(function () { $.getJSON("http://localhost:1337/?callback=?", function (data) { alert(JSON.stringify(data)); }); }); }); </script> </head> <body> <button id="test" type="button">Click me</button> </body> </html>
使用Express
$.ajax({ url: 'http://127.0.0.1:3000/', //请求的是3000端口，应该属于跨域调用，因此dataType用jsonp dataType: "jsonp", //jsonpCallback: "_test", //可以自定义‘处理’函数，默认是callback cache: false, jsonp:'callback', //默认的传递处理函数是callback timeout: 5000, success: function(data) { var data = $.parseJSON(data); alert(data.message); }, error: function(jqXHR, textStatus, errorThrown) { alert('error ' + textStatus + " " + errorThrown); } }); var express = require('express') //引入express模块，当然也可以不用引入，而直接引入http模块 , app = express.createServer() , url = require('url'); app.get('/',function(req, res){ var queryObj = url.parse(req.url,true).query; res.send(queryObj.callback+'(\'{"message": "test"}\')'); //res.send('_test(\'{"message": "test"}\')'); //对应jsonpCallback的函数 }); app.listen(3000);
Refer：
