我正在尝试使用访问代码获得响应并得到：
XMLHttpRequest 无法加载 "h...：//login.microsoftonline.com/d331431b-899c-4666-8094-e82e6bfc3964/oaut...auth%2faad&scope=user_impersonation&state=033f4ad89a574135884fd3a03c1743ab".请求的资源上不存在"访问控制允许源"标头。因此，不允许访问源"http://localhost:23589"。
使用了ServiceStack、CORS 和 OPTIONS(无访问控制允许源标头)讨论中的所有建议：
添加：
Plugins.Add(new CorsFeature(new[] { "http://localhost/", "http://localhost:23589" },
allowCredentials: true,
allowedHeaders: "Content-Type, Allow, Authorization"));
甚至：
PreRequestFilters.Add((httpReq, httpRes) =>
{
//if (httpReq.Verb == "OPTIONS")
//{
// var origin = httpReq.Headers.Get("Origin");
string origin = httpReq.Headers.Get("Origin");
httpRes.AddHeader(HttpHeaders.AllowOrigin, "*");
httpRes.EndRequest();
// }
});
还是没有运气。我们使用的是服务堆栈版本 4.0.56
请求网址：
> https://login.microsoftonline.com/d331431b-899c-4666-8094-e82e6bfc3964/oauth2/authorize?response_type=code&resource=https%3a%2f%2fanalysis.windows.net%2fpowerbi%2fapi&client_id=0d3be5ed-3361-43f5-9d25-a5ccefb11f7e&redirect_uri=http%3a%2f%2flocalhost%3a23589%2fapi%2fauth%2faad&scope=user_impersonation&state=d6ef09f8064643ed914d4995562642be
Request Method:GET
Status Code:200 OK
Remote Address:157.55.208.218:443
响应标头：
HTTP/1.1 200 OK
Cache-Control: no-cache, no-store
Pragma: no-cache
Content-Type: text/html; charset=utf-8
Content-Encoding: gzip
Expires: -1
Vary: Accept-Encoding
Server: Microsoft-IIS/8.5
x-ms-request-id: d2531fb2-2e97-4940-a15d-f3c6f1cd5e7b
client-request-id: 376b2cb0-e1d2-4749-a8b5-adfee1b3ceba
X-Frame-Options: DENY
x-ms-gateway-service-instanceid: ESTSFE_IN_344
X-Content-Type-Options: nosniff
Strict-Transport-Security: max-age=31536000; includeSubDomains
P3P: CP="DSP CUR OTPi IND OTRi ONL FIN"
Set-Cookie: buid=AAABAAEAiL9Kn2Z27UubvWFPbm0gLfvzURnxA_SU_2fqg40MIAq5oFqJPcrl7iSuhLgh52CsEbHynIx5Krpov-SlQ7tVxK9O3EWPdKHzur0dQHXgfE4FLI6Vmv3-HwokZIpKbXA2IAA; expires=Fri, 02-Dec-2016 17:25:56 GMT; path=/; secure; HttpOnly
Set-Cookie: esctx=AAABAAAAiL9Kn2Z27UubvWFPbm0gLdbqNasFxQzD3cBv92w234pND-QPmCQNU9pfwexBLi9fullMTJbXyFHlgwaIpWQHx6OpBt9rHaIVDwlxaAh7MqFmsrHiMcoXcWy55B0veMpU10kthlQdtj37nLx1_p3ocBF3tMJ822MGbR2D-Epr8iTW2AmiL46Q2oxA9gHfuwYBIAA; domain=.login.microsoftonline.com; path=/; secure; HttpOnly
Set-Cookie: x-ms-gateway-slice=productiona; path=/; secure; HttpOnly
Set-Cookie: stsservicecookie=ests; path=/; secure; HttpOnly
X-Powered-By: ASP.NET
Date: Sun, 05 Jun 2016 17:25:55 GMT
Content-Length: 9602
请求标头：
Accept:application/json, text/plain, */*
Accept-Encoding:gzip, deflate, sdch, br
Accept-Language:en-US,en;q=0.8,ru;q=0.6
Cache-Control:max-age=0
Connection:keep-alive
Host:login.microsoftonline.com
Origin:http://localhost:23589
Referer:http://localhost:23589/
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36
我还尝试在AppHost Confugure方法中添加此代码：
base.SetConfig(new HostConfig
{
GlobalResponseHeaders = {
{ "Access-Control-Allow-Origin", "*" },
{ "Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS" },
{ "Access-Control-Allow-Headers", "Content-Type" },
},
});
来自提琴手：
请求标头：
GET /d331431b-899c-4666-8094-e82e6bfc3964/oauth2/authorize?response_type=code&resource=https%3a%2f%2fanalysis.windows.net%2fpowerbi%2fapi&client_id=0d3be5ed-3361-43f5-9d25-a5ccefb11f7e&redirect_uri=http%3a%2f%2flocalhost%3a23589%2fapi%2fauth%2faad&scope=user_impersonation&state=3c41d4ea46a8408fb19fdf05ea07643a HTTP/1.1
Host: login.microsoftonline.com
Connection: keep-alive
Cache-Control: max-age=0
Accept: application/json, text/plain, */*
Origin: http://localhost:23589
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36
Referer: http://localhost:23589/
Accept-Encoding: gzip, deflate, sdch, br
Accept-Language: en-US,en;q=0.8,ru;q=0.6
响应标头：
HTTP/1.1 200 OK
Cache-Control: no-cache, no-store
Pragma: no-cache
Content-Type: text/html; charset=utf-8
Expires: -1
Vary: Accept-Encoding
Server: Microsoft-IIS/8.5
x-ms-request-id: 70fcd73f-f880-4744-b896-6edc491b1d22
client-request-id: a52446b6-a7f0-4afb-ba23-8d27207ddb27
X-Frame-Options: DENY
x-ms-gateway-service-instanceid: ESTSFE_IN_19
X-Content-Type-Options: nosniff
Strict-Transport-Security: max-age=31536000; includeSubDomains
P3P: CP="DSP CUR OTPi IND OTRi ONL FIN"
Set-Cookie: buid=AAABAAEAiL9Kn2Z27UubvWFPbm0gLWnOYMRRqrZRDzgogkab1uuAetOi-f1iLnpE1G5EU3xMkzYdvTgIs2Fz79S07PNcfnEry6eWS8RX_4k8awcIgY063VQ7VvWP6SRRvXfCgpJeIAA; expires=Fri, 02-Dec-2016 22:20:48 GMT; path=/; secure; HttpOnly
Set-Cookie: esctx=AAABAAAAiL9Kn2Z27UubvWFPbm0gLZemnOQ8vijuCpi6h8NzV-CjOfr0MZwZhb4Nfczf20C1TSXORoJbIHCbVBV_MmeuXTR1mbzh9GzFIBmi__ff0M-gGh02fol-sHPyKJnU7Zfi2cEYWensHvmiEJO9Tw5KbO8tWdZxl-XDi7V5IZNNsJWp4LxTVVGkOeyOYieMfJ6mIAA; domain=.login.microsoftonline.com; path=/; secure; HttpOnly
Set-Cookie: x-ms-gateway-slice=productiona; path=/; secure; HttpOnly
Set-Cookie: stsservicecookie=ests; path=/; secure; HttpOnly
X-Powered-By: ASP.NET
Date: Sun, 05 Jun 2016 22:20:49 GMT
Content-Length: 36210
问题是因为您尝试通过 Ajax 调用/api/auth/aadOAuth 路由，而不是直接在页面中链接到它。
无法通过 Ajax 调用 AAD OAuth 路由，因为它重定向到的用于捕获客户端授权 (https://login.microsoftonline.com/..) 的 url 不允许 CORS，如你看到的错误所示。
这不是一个ServiceStack CORS问题，你不需要它来与本地API的(即http://localhost:23589)，因为它托管在与 HTML 页面相同的域中。使用 Ajax 访问域外的资源(即https://login.microsoftonline.com/..)，因为它不允许 CORS 允许您通过 Ajax 访问该 URL。
删除网址中的最后一个斜杠 "http://localhost">
正如mythz在他的回答中所解释的那样，CORS不允许来自您的原始域。但是，你可以向 Azure (？) Microsoft注册应用程序。Active Directory，以便它可以显示一个单独的登录对话框，该对话框将在身份验证成功后立即向应用程序返回回调。
有关 AAD 登录流的详细信息(请注意，这是一个 NodeJS 示例，不是裸 javascript，但相同的逻辑适用)，请查看 Azure AD 入门。