Httpwebrequest doesn't seem to be following the auto redirect from request
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Https://www.example.com);
request.AllowAutoRedirect = true;
which redirects to
https://www.example.com/pageunknown
however
HttpWebResponse response = (HttpWebResponse)request.GetResponse()
is reading the contents from
Https://www.example.com
and not the redirects content
https://www.example.com/pageunknown
how can I get it so that the redirection is followed and httpwebresponse reads from the redirection page and not the original url/request?
Related
I have a service REST API where I tryied to connect.
Using browser all is ok.
But in c# I always have an unauthorized answer.
I investigated this issue using fiddler and find out that in first unsuccessful reuest server returns some cookie, and browser use it in next session together with username/password (digest type).In this case second session is successful.
But when I try to send request using c# (I tried work with System.Net.WebClient and HttpWebRequest) I don't get response (I had timeout exception after some time).
My code:
WebClient webClient = new WebClient();
CredentialCache cache = new CredentialCache();
Uri prefix = new Uri(Url);
cache.Add(prefix, "Digest", new NetworkCredential(login, password));
webClient.Credentials = cache;
...
string response = webClient.DownloadString(restRequest);
Last line throws exception.
When I investigated this issue in Fiddler I found out that in first session with status 401 we recieved cookie (like on picture below).
fiddler's picture
Browser sends this cookie in next request and authentication happens successfully.
But in c# I couldn't geet this response with status 401. As I see in fiddler studio try to open new session 10-20 times during each next seconds before timeout exception will be thrown. And my response in null.
Also I have other environment without required cookie, there my code is working.
Please, give me a piece of advise hoe to get response with Status 401 and get cookie from it to set it to another request.
thanks
Mike
I resolved this issue using HttpWebRequest with defined empty (not null) CookieContainer.
My code:
HttpWebRequest request1;
HttpWebResponse response1 = null;
String responseBody;
request1 = (HttpWebRequest) WebRequest.Create(requestString);
request1.Credentials = cache;
request1.CookieContainer = new CookieContainer();
response1 = (HttpWebResponse) request1.GetResponse();
using (StreamReader stream = new StreamReader(response1.GetResponseStream(), Encoding.UTF8))
{
responseBody = stream.ReadToEnd();
}
In this implementation after first session with status 401 requests provide cookie from first session to next one and it returns with status code 200 OK.
Hello I need some help with livestreamrecord recording via http url c# calls,
I can start and stop a stream recording using:
http://[username]:[password]#[wowza-ip-address]:8086/livestreamrecord?app=live&streamname=myStream&action=startRecording
When inputting it directly in to a browser or when I redirect my webpage to it from code, but when I try to do the same from c# on a webpage nothing happens.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://[username]:[password]#[wowza-ip-address]:8086/livestreamrecord?app=live&streamname=myStream&action=startRecording);
request.Method = "GET";
request.Proxy = new WebProxy("[wowza-ip-address]", 8086);
request.Credentials = new NetworkCredential("[username]", "[password]");
request.ContentType = "application/x-www-form-urlencoded";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream stm = response.GetResponseStream();
When I first tried to set it up I kept getting 401 unauthorized error which the code above no long throws, but now I'm stuck as no error is thrown and still no recording is started.
The response returns:
<html><head><title>Wowza Streaming Engine 4 Perpetual Edition 4.0.1 build10615</title></head><body>Wowza Streaming Engine 4 Perpetual Edition 4.0.1 build10615</body></html>
Which indicates it is not reaching the livestreamrecord page.
Ben
Sovled the problem, thier was a 302 redirect on the request which was producing the 401 unauthorized responses. Adding:
request.AllowAutoRedirect = false;
and removing:
request.Proxy = new WebProxy("[wowza-ip-address]", 8086);
Resolved the problem.
With Proxy in, it didn't throw an error but also didn't record. Removing Proxy allowed the record command to work but throw the 401 response which was then resolved by setting AllowAutoRedirect to false.
If I copy and past the following URL in the browser, I get a response URL with a query string sessionid in it:
https://abc.abcdefg.com/abcd/sessionServlet
I am trying to capture that response URL and session id in my code behind in .net:
string url = "https://abc.abcdefg.com/abcd/sessionServlet";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Label1.Text = response.ResponseUri.ToString();
the response.ResponseUri contains my original URL, but not the response URL I get back from the sessionServlet.
Could anyone help me? Thank you in advance.
Looking at your comment about the http://devserver/myproject/login.aspx?sessionid=1341351j1oij4o1i3o13i5ho1i3j4134o URL appearing the browser from vising the URL https://abc.abcdefg.com/abcd/sessionServlet, you're probably being redirected using HTTP 301 or 302.
If so, I'd add request.AllowAutoRedirect = true MSDN which will allow your web request to follow that redirect. Then response.ResponseUri.Query should have the querystring that you're looking for.
I'm trying to make an authorized get request to api.twitter.com/1/followers/ids.xml It keeps returning 401 not authorized. .Ive checked the header and base string against the ones generated in the OAuth tool in twitter developers app page and they are exactly the same. I've also tried changing the method to post instead of get to no avail.
here is the code:
ServicePointManager.Expect100Continue = false;
HttpWebRequest request =(HttpWebRequest)WebRequest.Create("http://api.twitter.com/1/followers/ids.xml");
request.Headers.Add(Uri.EscapeDataString("Authorization: "), authHeader);
request.Method = "GET";
request.ContentType = "application/x-www-form-urlencoded";
WebResponse response = request.GetResponse();
Is there a problem with the way I am sending the request?
You need to add either the screen_name or user_id of the twitter user you're interested in. For example: https://api.twitter.com/1/followers/ids.json?cursor=-1&screen_name=twitterapi
Is there a way to get the .ASPXAUTH value programmatically.
Example I login to a website with my own credentials (POST) and then read the response...it does not return the .APSXAUTH in the CookieContainer that I use to track the session.
Anyone has a clue how can I get it and send it with the subsequent gets and posts?
[EDIT] Here's what I do to be more specific:
send a HTTP GET to a page. read values like _VIEWSTATE etc.
send a HTTP POST to the Login page. It includes the login information.
The server sends a 302 response (redirect) to some Default page. The forms authentication cookie is supposed to be included but it's not.
So I was thinking that there might be a better way than this to track session:
CookieContainer _cookieJar = new CookieContainer();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(_url);
request.CookieContainer = _cookieJar;
So the summarize the answer:
If you're trying to login programatically on a Forms based authentication website trough your own application make sure you follow the steps you take that track the cookies.
First create a initial GET request, and then do the subsequential POST requests that will do the postback.The request and the responses should be formulated in this way:
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(_url);
request.CookieContainer = _cookieJar;
HttpWebResponse httpsResponse = (HttpWebResponse)request.GetResponse();
The CookieContainer class handles the cookies as expected.
And if your response is encoded with Gzip just include the following line:
request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
before you call request.GetResponse()
Hope this helps someone out there.