Using Web Browser control or http request in C#, when a website creates a cookie (or tries to), is there a way to capture and display that cookie?
Yes, cookies are returned in the Set-Cookie header. You can use the HttpWebResponse.Headers collection to look through all of the headers and read out the cookies, or there's also the Cookies collection which wraps it for you.
Sure, you can use a tool like Fiddler or FireBug to capture and inspect the requests and responses sent during your session. I'm more familiar with Fiddler, so I'm basing my answer and example on it.
For example, if I log in to my company's Outlook Web Access portal, I enter my user name and password, and the OWA client writes a session cookie to my machine. If I have Fiddler running while I log in, I can see this cookie being written as part of the response from the server due to a successful log in:
**Cookies / Login**
Set-Cookie: sessionid=d8ff0256-7339-4049-81c2-fae98f7c3ed5:0x409; path=/
If there are more cookies being sent down, you'll see them listed under the Cookies group.
I can see these cookies if I click on the resource that was requested (the page that I'm taken to after successful login), and then click on the Headers tab in the Response section of Fiddler.
Hope this helps!
Related
I am trying to get a token stored in a cookie using Webview2. The login server has a complex process with many redirects, with DevTools from Edge I am able to see when my token (idToken) is received:
The problem is that I am not able to see all the requests in the code and therefore the request with the token.
I have tried using:
CoreWebView2.NavigationCompleted
CoreWebView2.SourceChanged
CoreWebView2.FrameNavigationCompleted
CoreWebView2.WebResourceResponseReceived
But none of them show all the redirects and requests of the authentication process. Can someone explain me how to see all the requests the browser goes through?
I'm sending httpwebrequest to server, and save cookies in environment variable and attach them to requests. I want to know if it is possible to transfer cookies to browser(open some link in browser) and session will preserve.( I authenticate from console, and I want authentication to stay when opening webpage in browser)
I have solved this by implementing API on server, which gives id to append to link, to maintain session.
In the simulation of logging into a website with C#.
(a banking website specifically ),
Should there be any cookie expected in the POST request HttpWebRequest (if this C# simulation parallels the process of a web browser visiting the site for its first time and logging in)? Do I need to include HttpWebRequest.Headers.Add("Cookie", cookieString) or should the cookie be omitted (since it's a first visit)? According to my understanding, a web browser receives its first cookie after its first visit; the browser doesn't have any cookie to submit when it requests for a website for its first visit. However, the browser will be able to submit cookies for its second visit (and third, etc).
Hopefully this is a simple question for someone out there.
Basically upon receiving a request to my MVC controller, I want to:
Add an "Authorization" header to the response
Redirect to another application sitting on another domain
Read the "Authorization" header at this external site.
It appears the act of redirecting, strips out all my custom headers and redirects.
My question, how can I add a new header, AND perform a redirect, AND have that header show up in the headers for the receiving host [at the end of the redirect] to read?
You can't. That's not how HTTP works. First, a "redirect" is just a 301, 302, or (since HTTP 1.1) 307 status code with the Location header set to the URL the client should go to. It's the client that initiates the request to that URL, so you have no control over what headers they send.
Second, HTTP is stateless, so the fact that an Authorization header was sent in some response at some point has zero bearing on anything that happens in any future requests. Web browsers and other HTTP clients skirt around the stateless nature of HTTP by using sessions on the server-side and cookies on the client side. The client sends the cookie to the server with the request. The cookie matches an item in the session store on the server, and the server loads up the data from that session to give the appearance as though state was maintained.
Third, cookies don't work in this situation, because they are domain bound and are not sent along with requests to domains they did not originate from. So, even if you were to create session to maintain the authorization, the other site would never see it.
FWIW, the basic premise here, sharing authentication state with a different domain, is exactly what technologies like OAuth were developed for. So direct future research in that direction.
No - 302 redirect are handled by browser and it will not re-attach headers.
Options:
server side proxy
use cookies instead of other headers (if it is the same domain, not your case per 2)
manual redirect client side (may be ok since you are making AJAX call anyway).
I need to sign in to a site, I can do this via an url such as url.com/ssorequest?parameters=123. If this is typed in the address im signed in in and gets redirected to the portal.
Now Im supposed to do this through a http post request programmatically but I cant get it to work, I get redirected to a sign in form instead of the portal, ie I dont get signed in.
I used Fiddler to find out what the difference between the two methods was. I found that a couple of behind-the-scenes get-requests were different. The browsers get-requests sends cookie data to the server and fiddlers post-request does not.
When I use fiddler to repeat the browsers first call it doesnt send the cookie data either. So it only works when I do it via the browser window. Unless I use breakpoints in fiddler and tamper with the requests to include the cookie data.
Q: Why does it behave differently from the browser with both http post and when the request is done from Fiddler?
Q: Is there any way to tamper with the requests going out programmatically in my C# app without writing my own Fiddler application?
Most probably you have encountered an anti-forgery cookie. It works in a way to ensure that you are signing in using the page that was first requested and loaded in the browser and the cookie is valid for one request only and hence the fiddler will not be able to log in if you run the same request again.
Using C#, you first have to request the sign-in page and get the cookies provided with this page in a cookie container. Next time, when you post the page along with data, you have to make sure that the cookie is attached with the request.
Edit:
Step1: Browse any page on the site. This will initiate the session. It will also give you the session cookie.
Step2: Request the sign in page. send the cookie obtained in step one along with sign in page so that it can recognize the session. This step is critical. At this stage, there can be either of two things depending on the security system site is using. Either it will send a security cookie along with session cookie or it will add a hidden variable in the form along with a value which serves as security token. Make sure that you get this token/cookie.
Step2: Post the login information on the sign in page (or whatever page the form action leads to) along with the cookie/token obtained in step 1. If it is a token, include it in your post data along with login information or if a cookie, add it to request.