问题
I have a WPF (could be any winform I guess) app that tries to login to a standard MVC 5 website using a HttpClient.
Normally I can login successfully with a call to PostAsync() where I provide the UserName and Password params in a HttpContent!
However, when I add the [ValidateAntiForgeryToken] to my controller's Login (POST) action, the PostAsync() call fails with Internal Server Error.
I have tried collecting the "__RequestVerificationToken" from a simple GET request and sending it with my POST request by adding it to the POST params, the Header of the request or the HttpHandler's CookieContainer (or any combination of the three) but still I get error 500 from the server.
I know it can be done with HttpWebRequests (apparently) but I don't know what I'm missing when using a HttpClient. I also don't know what exactly went wrong on the server side.. or how to check that since the code never reaches my controller method.
Did someone else try this by any chance?
EDIT 1:
I'm adding the raw data sent by the browser for both GET and POST:
GET http://localhost:57457/Account/Login HTTP/1.1
Accept: text/html, application/xhtml+xml, */*
Referer: http://localhost:57457/Account/Login
Accept-Language: en-US
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
DNT: 1
Host: localhost:57457
Cookie: NavigationTreeViewState=%5b%7b%27N0_1%27%3a%27T%27%2c%27N0%27%3a%27T%27%7d%2c%27N0_1_2%27%2c%7b%7d%5d; style=default; __RequestVerificationToken=Bak42Ga5sHJitYlmut6OgvmqXNmP7kKQRNaMSsLMAUh86iHGGmz5pnNfz_soKu46Wax9sG23arPOTnSh1bvaWyWqQ9NH4GJxFmendW8VFTg1
RESPONSE:
HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Content-Encoding: gzip
Vary: Accept-Encoding
Server: Microsoft-IIS/8.0
X-AspNetMvc-Version: 5.2
X-Frame-Options: SAMEORIGIN
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?RDpcRUJTLkNvZGVcUHJvamVjdHNcQ1ZSUE9TX1dlYlNpdGVcQ1ZSUE9TX1dlYlNpdGVcQWNjb3VudFxMb2dpbg==?=
X-Powered-By: ASP.NET
Date: Thu, 04 Dec 2014 10:00:00 GMT
Content-Length: 1734
[View page content]
POST http://localhost:57457/Account/Login HTTP/1.1
Accept: text/html, application/xhtml+xml, */*
Referer: http://localhost:57457/Account/Login
Accept-Language: en-US
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
Content-Length: 180
DNT: 1
Host: localhost:57457
Pragma: no-cache
Cookie: NavigationTreeViewState=%5b%7b%27N0_1%27%3a%27T%27%2c%27N0%27%3a%27T%27%7d%2c%27N0_1_2%27%2c%7b%7d%5d; style=default; __RequestVerificationToken=Bak42Ga5sHJitYlmut6OgvmqXNmP7kKQRNaMSsLMAUh86iHGGmz5pnNfz_soKu46Wax9sG23arPOTnSh1bvaWyWqQ9NH4GJxFmendW8VFTg1
__RequestVerificationToken=Bak42Ga5sHJitYlmut6OgvmqXNmP7kKQRNaMSsLMAUh86iHGGmz5pnNfz_soKu46Wax9sG23arPOTnSh1bvaWyWqQ9NH4GJxFmendW8VFTg1&UserName=test&Password=test
RESPONSE:
HTTP/1.1 400 Bad request (user/password for testing purposes only)
Cache-Control: private
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/8.0
X-AspNetMvc-Version: 5.2
X-Frame-Options: SAMEORIGIN
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?RDpcRUJTLkNvZGVcUHJvamVjdHNcQ1ZSUE9TX1dlYlNpdGVcQ1ZSUE9TX1dlYlNpdGVcQWNjb3VudFxMb2dpbg==?=
X-Powered-By: ASP.NET
Date: Thu, 04 Dec 2014 10:00:00 GMT
Content-Length: 4434
[View page content]
EDIT 2:
This is what my app sends for GET and POST:
GET http://localhost:57457/Account/Login HTTP/1.1
Host: localhost:57457
Connection: Keep-Alive
POST http://localhost:57457/Account/Login HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Host: localhost:57457
Cookie: __RequestVerificationToken=df9nBSP_J1IiLrv84RwrkmvbYBrnH4iqv97wRvz6HMPLWBhgI4XzGeAFcschovHwD8mTtHU6xrmVxz1Ku96_BaoB79le_vLTcrgGemU4gjc1
Content-Length: 163
Expect: 100-continue
__RequestVerificationToken=df9nBSP_J1IiLrv84RwrkmvbYBrnH4iqv97wRvz6HMPLWBhgI4XzGeAFcschovHwD8mTtHU6xrmVxz1Ku96_BaoB79le_vLTcrgGemU4gjc1&UserName=test&Password=test
And finally this is the error:
[HttpAntiForgeryException (0x80004005): Validation of the provided anti-forgery token failed. The cookie "__RequestVerificationToken" and the form field "__RequestVerificationToken" were swapped.]
Thanks!
回答1:
You d probably need to include aspnet session id cookie with your requests
EDIT: OK ur right, it is not the session id, but you need two token to send back to your post action.
I think what you re doing wrong is using same value for both tokens, but they should be different, altho name of both tokens is __RequestVerificationToken. Token grabbed from cookie should be send back as cookie and token grabbed from form field goes back as form field.
回答2:
It's because you're missing the anti-forgery token from HtmlHelper.AntiForgeryToken() in your POST from your application.
You'll need to load a page from your WPF application with HtmlHelper.AntiForgeryToken() on the view. Then take the value of the hidden input element with the name __RequestVerificationToken and attach it to your login POST request to the server.
来源：https://stackoverflow.com/questions/27278553/provide-antiforgery-token-with-system-net-http-httpclient-and-mvc