选项请求成功，但仍然出现 Access-Control-Allow-Origin 错误

Question

我正在从 Backbone 应用程序发出 DELETE 请求，但不确定为什么它会失败并出现如下所示的错误。

选项标题

这是我的 OPTIONS 标题，它是 200 Success

请求：

OPTIONS /revenues/674sf6 HTTP/1.1
Host: api2.revparmax.local
Connection: keep-alive
Access-Control-Request-Method: DELETE
Origin: http://localhost:3000
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) ....
Access-Control-Request-Headers: token, accept, origin, x-requested-with, content-type
Accept: */*
Referer: http://localhost:3000/app/daily/
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8

回复：

HTTP/1.1 200 OK
Date: Mon, 27 May 2013 20:01:32 GMT
Server: Apache/2.2.14 (Unix) DAV/2 mod_ssl/2.2.14 OpenSSL/0.9.8l PHP/5.3.1...
X-Powered-By: PHP/5.3.1
Access-Control-Allow-Origin: http://localhost:3000
Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS
Access-Control-Allow-Headers: origin, x-requested-with, content-type, accept, TOKEN
Access-Control-Max-Age: 86400
Content-Length: 2
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: application/json; charset=utf-8

删除标题

但是后来我的删除请求失败了……

请求：

DELETE http://api2.revparmax.local/revenues/674sf6 HTTP/1.1
TOKEN: 00899766786875875674557454
Accept: application/json, text/javascript, */*; q=0.01
Referer: http://localhost:3000/app/daily/
Origin: http://localhost:3000
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) ....
Content-Type: application/x-www-form-urlencoded; charset=UTF-8

错误

XMLHttpRequest cannot load http://api2.revparmax.local/revenues/674sf6. Origin http://localhost:3000 is not allowed by Access-Control-Allow-Origin.

注意

哦 - 我应该提到模型仍然从服务器中删除，但我的问题是我的骨干应用程序中延迟的 Ajax 都因为这个错误而被抛出。

另外，我的请求负载在失败时是 [object Object] - 这会导致问题吗？

Answer 1

您在运行 Chrome 吗？如果是这样，那么您可能遇到了 CORS localhost 错误。见this SO question。