Question

我已在我的应用程序中启用了全局CORS支持

        this.Plugins.Add(new CorsFeature(
            allowCredentials: true,
            allowedHeaders: "Content-Type, Authorization",
            allowedOrigins: "*",
            allowedMethods: "GET, POST, OPTIONS"
        ));

        this.GlobalRequestFilters.Add((httpReq, httpRes, httpDto) =>
        {
            if (httpReq.Verb == "OPTIONS")
            {
                httpRes.EndRequest();
            }
        });

在我的路线中，我添加了OPTIONS动词（可能没有必要）

        [Route("/Mailers", "POST, GET, OPTIONS")]
        public class MailersRequest {
            public List<Int64> Properties { get; set; }
        }

除了IE 11之外，我尝试过的所有浏览器都能很好地运行。新的Edge浏览器和Chrome一样好。在IE 11上，对/ mailers的OPTIONS请求根本没有响应。以下是请求标题：

Request URL: https://api.blahblah.com:4443/mailers
Request Method: OPTIONS
Accept: */*
Accept-Encoding: gzip, deflate
Access-Control-Request-Headers: accept, content-type
Access-Control-Request-Method: POST
Cache-Control: no-cache
Connection: Keep-Alive
Content-Length: 0
Host: api.blahblahblah.com:4443
Origin: https://www.housesellersource.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; Touch; rv:11.0) like Gecko

请求无限期地处于Pending状态。同样，在其他浏览器中一切正常。

有什么想法吗？谢谢！

Answer 1

首先，您无需为处理OPTIONS请求指定GlobalRequestFilters，即：

this.GlobalRequestFilters.Add((httpReq, httpRes, dto) => {
    if (httpReq.Verb == "OPTIONS")
        httpRes.EndRequest();
});

由于OPTIONS已经handled by ServiceStack's CorsFeature。

但它似乎是issue with CORS in IE is that requires a valid P3P Policy。

ServiceStack CORS - 仅对IE中的OPTIONS请求没有响应

1 个答案: