internal static WebResponse GetResponse(Func <WebRequest> createRequest,
Action <WebRequest> prepareRequest,
IProxyCache proxyCache,
ICredentialCache credentialCache,
ICredentialProvider credentialProvider)
{
HttpWebRequest previousRequest = null;
IHttpWebResponse previousResponse = null;
HttpStatusCode? previousStatusCode = null;
bool usingSTSAuth = false;
bool continueIfFailed = true;
int proxyCredentialsRetryCount = 0;
int credentialsRetryCount = 0;
while (true)
{
// Create the request
var request = (HttpWebRequest)createRequest();
request.Proxy = proxyCache.GetProxy(request.RequestUri);
if (request.Proxy != null && request.Proxy.Credentials == null)
{
request.Proxy.Credentials = CredentialCache.DefaultCredentials;
}
if (previousResponse == null || ShouldKeepAliveBeUsedInRequest(previousRequest, previousResponse))
{
// Try to use the cached credentials (if any, for the first request)
request.Credentials = credentialCache.GetCredentials(request.RequestUri);
// If there are no cached credentials, use the default ones
if (request.Credentials == null)
{
request.UseDefaultCredentials = true;
}
}
else if (previousStatusCode == HttpStatusCode.ProxyAuthenticationRequired)
{
request.Proxy.Credentials = credentialProvider.GetCredentials(request, CredentialType.ProxyCredentials, retrying: proxyCredentialsRetryCount > 0);
continueIfFailed = request.Proxy.Credentials != null;
proxyCredentialsRetryCount++;
}
else if ((previousStatusCode == HttpStatusCode.Unauthorized) && !usingSTSAuth)
{
// If we are using STS, the auth's being performed by a request header. We do not need to ask the user for credentials at this point.
request.Credentials = credentialProvider.GetCredentials(request, CredentialType.RequestCredentials, retrying: credentialsRetryCount > 0);
continueIfFailed = request.Credentials != null;
credentialsRetryCount++;
}
try
{
ICredentials credentials = request.Credentials;
SetKeepAliveHeaders(request, previousResponse);
if (usingSTSAuth)
{
// Add request headers if the server requires STS based auth.
STSAuthHelper.PrepareSTSRequest(request);
}
// Prepare the request, we do something like write to the request stream
// which needs to happen last before the request goes out
prepareRequest(request);
// Wrap the credentials in a CredentialCache in case there is a redirect
// and credentials need to be kept around.
request.Credentials = request.Credentials.AsCredentialCache(request.RequestUri);
WebResponse response = request.GetResponse();
// Cache the proxy and credentials
proxyCache.Add(request.Proxy);
credentialCache.Add(request.RequestUri, credentials);
credentialCache.Add(response.ResponseUri, credentials);
return(response);
}
catch (WebException ex)
{
using (IHttpWebResponse response = GetResponse(ex.Response))
{
if (response == null &&
ex.Status != WebExceptionStatus.SecureChannelFailure)
{
// No response, something went wrong so just rethrow
throw;
}
// Special case https connections that might require authentication
if (ex.Status == WebExceptionStatus.SecureChannelFailure)
{
if (continueIfFailed)
{
// Act like we got a 401 so that we prompt for credentials on the next request
previousStatusCode = HttpStatusCode.Unauthorized;
continue;
}
throw;
}
// If we were trying to authenticate the proxy or the request and succeeded, cache the result.
if (previousStatusCode == HttpStatusCode.ProxyAuthenticationRequired &&
response.StatusCode != HttpStatusCode.ProxyAuthenticationRequired)
{
proxyCache.Add(request.Proxy);
}
else if (previousStatusCode == HttpStatusCode.Unauthorized &&
response.StatusCode != HttpStatusCode.Unauthorized)
{
credentialCache.Add(request.RequestUri, request.Credentials);
credentialCache.Add(response.ResponseUri, request.Credentials);
}
usingSTSAuth = STSAuthHelper.TryRetrieveSTSToken(request.RequestUri, response);
if (!IsAuthenticationResponse(response) || !continueIfFailed)
{
throw;
}
previousRequest = request;
previousResponse = response;
previousStatusCode = previousResponse.StatusCode;
}
}
}
}
public WebResponse GetResponse()
{
_previousRequest = null;
_previousResponse = null;
_previousStatusCode = null;
_usingSTSAuth = false;
_continueIfFailed = true;
_proxyCredentialsRetryCount = 0;
_credentialsRetryCount = 0;
int failureCount = 0;
const int MaxFailureCount = 10;
while (true)
{
// Create the request
var request = (HttpWebRequest)_createRequest();
ConfigureRequest(request);
try
{
if (_disableBuffering)
{
request.AllowWriteStreamBuffering = false;
// When buffering is disabled, we need to add the Authorization header
// for basic authentication by ourselves.
bool basicAuth = _previousResponse != null &&
_previousResponse.AuthType != null &&
_previousResponse.AuthType.IndexOf("Basic", StringComparison.OrdinalIgnoreCase) != -1;
var networkCredentials = request.Credentials.GetCredential(request.RequestUri, "Basic");
if (networkCredentials != null && basicAuth)
{
string authInfo = networkCredentials.UserName + ":" + networkCredentials.Password;
authInfo = Convert.ToBase64String(System.Text.Encoding.Default.GetBytes(authInfo));
request.Headers["Authorization"] = "Basic " + authInfo;
_basicAuthIsUsedInPreviousRequest = true;
}
}
// Prepare the request, we do something like write to the request stream
// which needs to happen last before the request goes out
_prepareRequest(request);
// Shim and replace this request if needed for v3
WebResponse response = HttpShim.Instance.ShimWebRequest(request);
// Cache the proxy and credentials
_proxyCache.Add(request.Proxy);
ICredentials credentials = request.Credentials;
_credentialCache.Add(request.RequestUri, credentials);
_credentialCache.Add(response.ResponseUri, credentials);
return(response);
}
catch (WebException ex)
{
++failureCount;
if (failureCount >= MaxFailureCount)
{
throw;
}
using (IHttpWebResponse response = GetResponse(ex.Response))
{
if (response == null &&
ex.Status != WebExceptionStatus.SecureChannelFailure)
{
// No response, something went wrong so just rethrow
throw;
}
// Special case https connections that might require authentication
if (ex.Status == WebExceptionStatus.SecureChannelFailure)
{
if (_continueIfFailed)
{
// Act like we got a 401 so that we prompt for credentials on the next request
_previousStatusCode = HttpStatusCode.Unauthorized;
continue;
}
throw;
}
// If we were trying to authenticate the proxy or the request and succeeded, cache the result.
if (_previousStatusCode == HttpStatusCode.ProxyAuthenticationRequired &&
response.StatusCode != HttpStatusCode.ProxyAuthenticationRequired)
{
_proxyCache.Add(request.Proxy);
}
else if (_previousStatusCode == HttpStatusCode.Unauthorized &&
response.StatusCode != HttpStatusCode.Unauthorized)
{
_credentialCache.Add(request.RequestUri, request.Credentials);
_credentialCache.Add(response.ResponseUri, request.Credentials);
}
_usingSTSAuth = STSAuthHelper.TryRetrieveSTSToken(request.RequestUri, response);
if (!IsAuthenticationResponse(response) || !_continueIfFailed)
{
throw;
}
if (!EnvironmentUtility.IsNet45Installed &&
request.AllowWriteStreamBuffering == false &&
response.AuthType != null &&
IsNtlmOrKerberos(response.AuthType))
{
// integrated windows authentication does not work when buffering is
// disabled on .net 4.0.
throw;
}
_previousRequest = request;
_previousResponse = response;
_previousStatusCode = _previousResponse.StatusCode;
}
}
}
}
public WebResponse GetResponse()
{
WebResponse response2;
this._previousRequest = null;
this._previousResponse = null;
this._previousStatusCode = null;
this._usingSTSAuth = false;
this._continueIfFailed = true;
this._proxyCredentialsRetryCount = 0;
this._credentialsRetryCount = 0;
int num = 0;
while (true)
{
HttpWebRequest request = (HttpWebRequest)this._createRequest();
this.ConfigureRequest(request);
try
{
if (this._disableBuffering)
{
request.AllowWriteStreamBuffering = false;
bool flag = ((this._previousResponse != null) && (this._previousResponse.AuthType != null)) && (this._previousResponse.AuthType.IndexOf("Basic", StringComparison.OrdinalIgnoreCase) != -1);
NetworkCredential credential = request.Credentials.GetCredential(request.RequestUri, "Basic");
if ((credential != null) & flag)
{
string s = credential.UserName + ":" + credential.Password;
s = Convert.ToBase64String(Encoding.Default.GetBytes(s));
request.Headers["Authorization"] = "Basic " + s;
this._basicAuthIsUsedInPreviousRequest = true;
}
}
this._prepareRequest(request);
WebResponse response = HttpShim.Instance.ShimWebRequest(request);
this._proxyCache.Add(request.Proxy);
ICredentials credentials = request.Credentials;
this._credentialCache.Add(request.RequestUri, credentials);
this._credentialCache.Add(response.ResponseUri, credentials);
response2 = response;
break;
}
catch (WebException exception)
{
if ((num + 1) >= 10)
{
throw;
}
using (IHttpWebResponse response3 = GetResponse(exception.Response))
{
if ((response3 == null) && (exception.Status != WebExceptionStatus.SecureChannelFailure))
{
throw;
}
if (exception.Status == WebExceptionStatus.SecureChannelFailure)
{
if (!this._continueIfFailed)
{
throw;
}
this._previousStatusCode = 0x191;
}
else
{
HttpStatusCode?nullable = this._previousStatusCode;
HttpStatusCode proxyAuthenticationRequired = HttpStatusCode.ProxyAuthenticationRequired;
if (((((HttpStatusCode)nullable.GetValueOrDefault()) == proxyAuthenticationRequired) ? (nullable != null) : false) && (response3.StatusCode != HttpStatusCode.ProxyAuthenticationRequired))
{
this._proxyCache.Add(request.Proxy);
}
else
{
nullable = this._previousStatusCode;
proxyAuthenticationRequired = HttpStatusCode.Unauthorized;
if (((((HttpStatusCode)nullable.GetValueOrDefault()) == proxyAuthenticationRequired) ? (nullable != null) : false) && (response3.StatusCode != HttpStatusCode.Unauthorized))
{
this._credentialCache.Add(request.RequestUri, request.Credentials);
this._credentialCache.Add(response3.ResponseUri, request.Credentials);
}
}
this._usingSTSAuth = STSAuthHelper.TryRetrieveSTSToken(request.RequestUri, response3);
if (!IsAuthenticationResponse(response3) || !this._continueIfFailed)
{
throw;
}
if (!EnvironmentUtility.IsNet45Installed && (!request.AllowWriteStreamBuffering && ((response3.AuthType != null) && IsNtlmOrKerberos(response3.AuthType))))
{
throw;
}
this._previousRequest = request;
this._previousResponse = response3;
this._previousStatusCode = new HttpStatusCode?(this._previousResponse.StatusCode);
}
}
}
}
return(response2);
}