I am trying to connect to a secure webDAV folder and download a file. I am having problems just trying to get a response from the server and as it keeps giving me a 404 Not Found error as soon as I call Request.GetResponse(). I can connect to the webDAV folder using Windows Explorer by mapping a drive but cannot seem to do this in code. I have looked at other post on this site and others online but most seem to concentrate on connecting to Outlook. Has anybody else had this issue? The code I am using is as follows:
string URI = "https://transfer.mycompany.com/myDirectory/myFile.csv";
string username = "username";
string password = "password";
Request = (HttpWebRequest) WebRequest.Create(URI);
Request.Credentials = new NetworkCredential(username, password);
Request.Method = WebRequestMethods.Http.Get;
Request.Headers.Add("Translate", "f");
Response = (HttpWebResponse) Request.GetResponse();
contentLength = Convert.ToInt64(Response.GetResponseHeader("Content-Length"));
Use the Fiddler tool to see what else headers are sent to the server, when you access it from Windows Explorer. Try adding these headers to your code to make it more similar to the request sent by WindowsExplorer and see if this helps.
Related
I'm trying to connect to a website using WebRequest and a proxy that has basic Authorization. When connecting to a http site works fine but if I try to connect to a https site get 401 error, looking at network monitor when I try to connect to a https site, don't know why the Authorization header its not present.
Already tried add NetworkCredentials at both proxy and WebRequest no luck either.
IWebProxy proxy = new WebProxy("http://proxyaddress:port");
HttpWebRequest conn = (HttpWebRequest)WebRequest.Create(WEBSERVICE_URL);
conn.Method = "GET";
String encoded = System.Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes("username:password"));
conn.Headers.Add("Authorization", "Basic " + encoded);
conn.PreAuthenticate = true;
conn.Proxy = proxy;
conn.GetResponse();
I had this issue recently where our company proxy stripped Basic auth headers (since it is not secure) when making an external API request to prevent leakage, the only way around this was to order a developer proxy for that URL so that there where no authentications or interceptions. If you have access to the proxy try to configure it to allow Basic auth.
I have run into a snag while building a web client that makes use of a RESTful web service using Integrated Windows Authentication.
When I run the client locally (as myself), it works fine, and I see my user id in the IIS logs. But, when I run it remotely, no credentials are passed (i.e. I do not see my user id in the IIS logs), and I get an error that
"The remote server returned an error: (401) Unauthorized."
Both the local and published client call the same service. Also note that the IIS logs show two entries (one without a username and one with a username) when I run it locally. When I run in from the published location, there are still two entries, but neither shows the username.
Below is the code I am using to make the call:
var request = (HttpWebRequest) WebRequest.Create(ConfigurationManager.AppSettings["positionServicePath"] + "?positionNumberSearch=" + searchString);
request.Method = "GET";
request.ContentType = "application/json";
request.UseDefaultCredentials = true;
request.PreAuthenticate = false;
CredentialCache cc = new CredentialCache();
cc.Add(
new Uri(ConfigurationManager.AppSettings["positionServicePath"]),
"Negotiate",
CredentialCache.DefaultNetworkCredentials);
request.Credentials = cc;
// Get the Response
using (var response = request.GetResponse()){
var reader = new StreamReader(response.GetResponseStream());
// Convert the response to objects from Json
var resultList = JsonConvert.DeserializeObject<IEnumerable<PositionModel>>(reader.ReadToEnd());
// Return an empty list, if no data was retrieved
return resultList != null ? resultList.ToList() : new List<PositionModel>();
}
Any help would be greatly appreciated.
I think you have to create IIS user permitted to your project.
Follow this Anonymous Access
Second Option:
Try to enabled anonymous access in Authentication Methods in Microsoft Internet Information Services (IIS).
Step:
1. Open your IIS.
2. In IIS Group:
3. open or select Authentication:
4. Select Anonymous Authentication:
5. On the Left Side select Enabled.
Good Luck!
I found the answer to this issue was the same for the answer to the following Stack Overflow post: Unable to authenticate to ASP.NET Web Api service with HttpClient.
Thank you to those who took the time to look this over!
I have written a simple ASP.Net WebAPI that download a file from an on-prem tfs server using a rest call. The issue is when I connect to this site from my user account(corp domain), and set the credentials in webRequest to CredentialsCache.DefaultCredentials, it works fine since I am a vlid user on the tfs project.
Now someone else in my team wishes to use the same webAPI and when they hit the same url, I could see that its my credentials being used again to download the file.
I suspect this is because of using CredentialsCache.DefaultCredentials in my controller code, but I am not able to find a way using which I should be able to use the client's identity to be used for the download request.
My question is , is there a way to extract the windows identity or network credentials of the remote user(on the same domain) which I can use for Authentication. I am sorry if this is a DUP but I could not find a targetted answer to my question yet. Sample code is pasted below.
var request = (HttpWebRequest)WebRequest.Create(uri);
request.Credentials = CredentialCache.DefaultNetworkCredentials;
try
{
var webResponse = request.GetResponse();
var webStream = webResponse.GetResponseStream();
if (webStream != null)
{
var objReader = new StreamReader(webStream);
return objReader.ReadToEnd()
}
}
I dont know if I understand you correctly but I think impersonation is what you're looking for:
http://msdn.microsoft.com/en-us/library/xh507fc5.ASPX
i want to download a ssrs report in Excel format in code.
So i first checked the url: it is correct
then i created a webrequest, with a NetworkCredential for the same user which can open the link in the browser.
I moved developing to the ssrs machine itself ( it has vs2008 on it)
so now i'm on the ssrs machine, logged on as user A, starting a webpage, create a webrequest with the same credentials as i'm currently logged on with to the ssrs machine (user A).... and get a 401.
What i don't know is what is giving me the 401. Is it the webserver denying me, or is it ssrs itself (i'm a newbee at ssrs so i don't know much about rights on reports in ssrs itself, but as i said: my logon credentials are the same as the webrequest credentials: user A).
i've googled a lot and tried 5 solutions, but no luck so far.
This won't work if NTLM credentials are required:
webrequest.Credential = new networkcredential ("","","");
You can try the following but it likely will not work:
webrequest.Credentials = CredentialCache.DefaultNetworkCredentials;
Chances are you will need to pass in the actual credentials like:
NetworkCredential networkCredential = new NetworkCredential(UserName, Password, Domain);
CredentialCache credCache = new CredentialCache();
credCache.Add(new Uri(url), "NTLM", networkCredential);
webrequest.Credentials = credCache;
SSRS will need to authentic the WebRequest and default/blank credentials cannot be passed in.
This reminded me of something I ran into a couple years ago:
http://support.microsoft.com/kb/896861
I'm not sure how likely this problem is, but I really think it's worth implementing "Method 2" from that support article (a simple registry addition) just to see if that resolves the problem. (Yes, the article lists a bunch of old OS versions, but I successfully used this on a bunch of SharePoint 2007 servers to resolve problems.)
Worth a try, I think...
I always set
WebRequest.UseDefaultCredentials = True
Then I run the app as the user accessing the SSRS server.
At first I suggest installing Fiddler Web Debugger on the machine where the calling application is run. This way you can see exactly the requests and responses that are made between your application and the SSRS. You might find something like an ISA proxy wanting you to additionally authenticate to it.
Assuming your caller is a console or WebForms application, the following code passes the credentials under which your application runs to the SSRS:
WebRequest webRequest = WebRequest.Create(url);
HttpWebRequest httpWebRequest = webRequest as HttpWebRequest;
// request authentication
httpWebRequest.UseDefaultCredentials = true;
// which is the same as
httpWebRequest.Credentials = CredentialCache.DefaultCredentials;
// optional proxy authentication
httpWebRequest.Proxy.Credentials = CredentialCache.DefaultCredentials;
Following the idea about using a WebProxy to make an http request to a server by IP address as demonstrated in the following answers :
Request Web Page in c# spoofing the Host
Http Request - Bypass DNS [.Net]
I'm trying to achive the same goal with an HTTPS request. I would like to still use an HttpWebRequest object in order to let the system automatically manage the certificate validation.
Unfortunately, this is not working and I get a System.Net.WebException with WebExceptionStatus.Timeout status.
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(
"https://www.mywebiste.net/"
);
System.Net.WebProxy proxy = new WebProxy(
"192.168.3.14"
, 443 // HTTPS
);
request.Proxy = proxy;
WebResponse response = request.GetResponse()
Any Help appreciated.
TIA.
Try setting BYPassOnLocal as false.
http://msdn.microsoft.com/en-us/library/234s6ee9.aspx