node.js下express的AJAX通訊：jsonp,json

原創

youyudehexie

2020-02-21 14:26

1.創建環境

#cmd express

2.修改代碼

app.js

/**
 * Module dependencies.
 */

var express = require('express')
  , routes = require('./routes')
  , user = require('./routes/user')
  , http = require('http')
  , path = require('path');

var app = express();

app.configure(function(){
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.favicon());
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);
  app.use(express.static(path.join(__dirname, 'public')));
});

app.configure('development', function(){
  app.use(express.errorHandler());
});

app.get('/', routes.index);
app.get('/users', user.list);

app.get('/jsonp',function(req,res,next){  #返回jsonp
   res.jsonp({status:'jsonp'});
});

app.get('/json',function(req,res,next){   #返回json
    res.send({status:'json'});
});

http.createServer(app).listen(app.get('port'), function(){
  console.log("Express server listening on port " + app.get('port'));
});

3.在public目錄下新建，ajax.html

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<script type="text/javascript">
    function get_jsonp() {
        $.getJSON("http://127.0.0.1:3000/jsonp?callback=?",  #跨域調用
                function(data) {
                    $('#rjsonp').val('Jsonp info : ' + data.status);
                });
    }

    function get_json(){   #Json調用
        $.getJSON("json",
                function(data) {
                    $('#rjson').val('Json info : ' + data.status);
                });
    }
</script>

<a href="javascript:get_jsonp();">Click me for jsonp</a><br />
<textarea id="rjsonp" cols="50" rows="3"></textarea>

<a href="javascript:get_json();">Click me for jsonp</a><br />
<textarea id="rjson" cols="50" rows="3"></textarea>

</body>
</html>

4.測試

輸入網址http://127.0.0.1:3000/ajax.html