我是 node.js/express 的新手。我看到了这篇文章(Allow CORS REST request to a Express/Node.js application on Heroku),但建议的解决方案不起作用。
我只是打电话给 mapquest api 来获取一些数据来玩。
这是我的 server.js 的一部分:
var allowCrossDomain = function(req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With');
// intercept OPTIONS method
if ('OPTIONS' == req.method) {
console.log('hit options');
res.send(200);
}
else {
next();
}
};
app.configure(function(){
console.log('configuring app');
app.use(allowCrossDomain);
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(__dirname + '/public'));
//app.use(express.static(path.join(application_root, "public")));
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});
/**
* Main route
*/
app.get('/', function (req, res, next) {
console.log("getting /");
Project.findAll()
.success(function (projects) {
res.render('index', { projects: projects });
})
.error(next);
});
这是我的客户端 main.js 的一部分:
$('#spec').click(function(ev){
var form = $(this);
$.ajax({
url: "http://www.mapquestapi.com/geocoding/v1/address?key=<mykey>"
, type: 'POST'
, datatype: 'json'
, contentType: 'json'
, data: {
location : {
"postalCode":"99999"
}
, options : { thumbMaps : false}
}
, success: function(resp){
$('#mapdata').html(resp);
}
, error : function(resp){
$('#mapdata').html(resp);
}
});
});
这是我在 chrome 开发窗口中的请求标头:
Accept:*/*
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Access-Control-Request-Headers:accept, origin, content-type
Access-Control-Request-Method:POST
Connection:keep-alive
Host:www.mapquestapi.com
Origin:http://localhost:3000
Referer:http://localhost:3000/
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.43 Safari/537.31
这是响应标头:
允许:跟踪,选项内容长度:0 日期:星期日,2013 年 4 月 7 日 03:18:48 GMT 服务器:Apache-Coyote/1.1
这是错误消息:
Origin http://localhost:3000 is not allowed by Access-Control-Allow-Origin.