C# Identifier.TrimFragment方法代码示例

		/// <summary>
		/// Performs identifier discovery and creates associations and generates authentication requests
		/// on-demand for as long as new ones can be generated based on the results of Identifier discovery.
		/// </summary>
		internal static IEnumerable<AuthenticationRequest> Create(Identifier userSuppliedIdentifier,
			OpenIdRelyingParty relyingParty, Realm realm, Uri returnToUrl, bool createNewAssociationsAsNeeded) {
			// We have a long data validation and preparation process
			if (userSuppliedIdentifier == null) throw new ArgumentNullException("userSuppliedIdentifier");
			if (relyingParty == null) throw new ArgumentNullException("relyingParty");
			if (realm == null) throw new ArgumentNullException("realm");

			userSuppliedIdentifier = userSuppliedIdentifier.TrimFragment();
			if (relyingParty.Settings.RequireSsl) {
				// Rather than check for successful SSL conversion at this stage,
				// We'll wait for secure discovery to fail on the new identifier.
				userSuppliedIdentifier.TryRequireSsl(out userSuppliedIdentifier);
			}

			if (Logger.IsWarnEnabled && returnToUrl.Query != null) {
				NameValueCollection returnToArgs = HttpUtility.ParseQueryString(returnToUrl.Query);
				foreach (string key in returnToArgs) {
					if (OpenIdRelyingParty.ShouldParameterBeStrippedFromReturnToUrl(key)) {
						Logger.WarnFormat("OpenId argument \"{0}\" found in return_to URL.  This can corrupt an OpenID response.", key);
						break;
					}
				}
			}

			// Throw an exception now if the realm and the return_to URLs don't match
			// as required by the provider.  We could wait for the provider to test this and
			// fail, but this will be faster and give us a better error message.
			if (!realm.Contains(returnToUrl))
				throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
					Strings.ReturnToNotUnderRealm, returnToUrl, realm));

			// Perform discovery right now (not deferred).
			var serviceEndpoints = userSuppliedIdentifier.Discover();

			// Call another method that defers request generation.
			return CreateInternal(userSuppliedIdentifier, relyingParty, realm, returnToUrl, serviceEndpoints, createNewAssociationsAsNeeded);
		}

        internal static AuthenticationRequest Create(Identifier userSuppliedIdentifier,
            OpenIdRelyingParty relyingParty, Realm realm, Uri returnToUrl)
        {
            if (userSuppliedIdentifier == null) throw new ArgumentNullException("userSuppliedIdentifier");
            if (relyingParty == null) throw new ArgumentNullException("relyingParty");
            if (realm == null) throw new ArgumentNullException("realm");

            userSuppliedIdentifier = userSuppliedIdentifier.TrimFragment();
            if (relyingParty.Settings.RequireSsl) {
                // Rather than check for successful SSL conversion at this stage,
                // We'll wait for secure discovery to fail on the new identifier.
                userSuppliedIdentifier.TryRequireSsl(out userSuppliedIdentifier);
            }
            Logger.InfoFormat("Creating authentication request for user supplied Identifier: {0}",
                userSuppliedIdentifier);
            Logger.DebugFormat("Realm: {0}", realm);
            Logger.DebugFormat("Return To: {0}", returnToUrl);

            if (Logger.IsWarnEnabled && returnToUrl.Query != null) {
                NameValueCollection returnToArgs = HttpUtility.ParseQueryString(returnToUrl.Query);
                foreach (string key in returnToArgs) {
                    if (OpenIdRelyingParty.ShouldParameterBeStrippedFromReturnToUrl(key)) {
                        Logger.WarnFormat("OpenId argument \"{0}\" found in return_to URL.  This can corrupt an OpenID response.", key);
                        break;
                    }
                }
            }

            var endpoints = new List<ServiceEndpoint>(userSuppliedIdentifier.Discover());
            ServiceEndpoint endpoint = selectEndpoint(endpoints.AsReadOnly(), relyingParty);
            if (endpoint == null)
                throw new OpenIdException(Strings.OpenIdEndpointNotFound);
            Logger.DebugFormat("Discovered provider endpoint: {0}", endpoint);

            // Throw an exception now if the realm and the return_to URLs don't match
            // as required by the provider.  We could wait for the provider to test this and
            // fail, but this will be faster and give us a better error message.
            if (!realm.Contains(returnToUrl))
                throw new OpenIdException(string.Format(CultureInfo.CurrentCulture,
                    Strings.ReturnToNotUnderRealm, returnToUrl, realm));

            string token = new Token(endpoint).Serialize(relyingParty.Store);
            // Retrieve the association, but don't create one, as a creation was already
            // attempted by the selectEndpoint method.
            Association association = relyingParty.Store != null ? getAssociation(relyingParty, endpoint, false) : null;

            return new AuthenticationRequest(
                token, association, endpoint, realm, returnToUrl, relyingParty);
        }

		/// <summary>
		/// Performs identifier discovery, creates associations and generates authentication requests
		/// on-demand for as long as new ones can be generated based on the results of Identifier discovery.
		/// </summary>
		/// <param name="userSuppliedIdentifier">The user supplied identifier.</param>
		/// <param name="relyingParty">The relying party.</param>
		/// <param name="realm">The realm.</param>
		/// <param name="returnToUrl">The return_to base URL.</param>
		/// <param name="createNewAssociationsAsNeeded">if set to <c>true</c>, associations that do not exist between this Relying Party and the asserting Providers are created before the authentication request is created.</param>
		/// <returns>
		/// A sequence of authentication requests, any of which constitutes a valid identity assertion on the Claimed Identifier.
		/// Never null, but may be empty.
		/// </returns>
		internal static IEnumerable<AuthenticationRequest> Create(Identifier userSuppliedIdentifier, OpenIdRelyingParty relyingParty, Realm realm, Uri returnToUrl, bool createNewAssociationsAsNeeded) {
			Contract.Requires<ArgumentNullException>(userSuppliedIdentifier != null);
			Contract.Requires<ArgumentNullException>(relyingParty != null);
			Contract.Requires<ArgumentNullException>(realm != null);
			Contract.Ensures(Contract.Result<IEnumerable<AuthenticationRequest>>() != null);

			// Normalize the portion of the return_to path that correlates to the realm for capitalization.
			// (so that if a web app base path is /MyApp/, but the URL of this request happens to be
			// /myapp/login.aspx, we bump up the return_to Url to use /MyApp/ so it matches the realm.
			UriBuilder returnTo = new UriBuilder(returnToUrl);
			if (returnTo.Path.StartsWith(realm.AbsolutePath, StringComparison.OrdinalIgnoreCase) &&
				!returnTo.Path.StartsWith(realm.AbsolutePath, StringComparison.Ordinal)) {
				returnTo.Path = realm.AbsolutePath + returnTo.Path.Substring(realm.AbsolutePath.Length);
				returnToUrl = returnTo.Uri;
			}

			userSuppliedIdentifier = userSuppliedIdentifier.TrimFragment();
			if (relyingParty.SecuritySettings.RequireSsl) {
				// Rather than check for successful SSL conversion at this stage,
				// We'll wait for secure discovery to fail on the new identifier.
				if (!userSuppliedIdentifier.TryRequireSsl(out userSuppliedIdentifier)) {
					// But at least log the failure.
					Logger.OpenId.WarnFormat("RequireSsl mode is on, so discovery on insecure identifier {0} will yield no results.", userSuppliedIdentifier);
				}
			}

			if (Logger.OpenId.IsWarnEnabled && returnToUrl.Query != null) {
				NameValueCollection returnToArgs = HttpUtility.ParseQueryString(returnToUrl.Query);
				foreach (string key in returnToArgs) {
					if (OpenIdRelyingParty.IsOpenIdSupportingParameter(key)) {
						Logger.OpenId.WarnFormat("OpenID argument \"{0}\" found in return_to URL.  This can corrupt an OpenID response.", key);
					}
				}
			}

			// Throw an exception now if the realm and the return_to URLs don't match
			// as required by the provider.  We could wait for the provider to test this and
			// fail, but this will be faster and give us a better error message.
			ErrorUtilities.VerifyProtocol(realm.Contains(returnToUrl), OpenIdStrings.ReturnToNotUnderRealm, returnToUrl, realm);

			// Perform discovery right now (not deferred).
			IEnumerable<IdentifierDiscoveryResult> serviceEndpoints;
			try {
				var results = relyingParty.Discover(userSuppliedIdentifier).CacheGeneratedResults();

				// If any OP Identifier service elements were found, we must not proceed
				// to use any Claimed Identifier services, per OpenID 2.0 sections 7.3.2.2 and 11.2.
				// For a discussion on this topic, see
				// http://groups.google.com/group/dotnetopenid/browse_thread/thread/4b5a8c6b2210f387/5e25910e4d2252c8
				// Usually the Discover method we called will automatically filter this for us, but
				// just to be sure, we'll do it here as well since the RP may be configured to allow
				// these dual identifiers for assertion verification purposes.
				var opIdentifiers = results.Where(result => result.ClaimedIdentifier == result.Protocol.ClaimedIdentifierForOPIdentifier).CacheGeneratedResults();
				var claimedIdentifiers = results.Where(result => result.ClaimedIdentifier != result.Protocol.ClaimedIdentifierForOPIdentifier);
				serviceEndpoints = opIdentifiers.Any() ? opIdentifiers : claimedIdentifiers;
			} catch (ProtocolException ex) {
				Logger.Yadis.ErrorFormat("Error while performing discovery on: \"{0}\": {1}", userSuppliedIdentifier, ex);
				serviceEndpoints = Enumerable.Empty<IdentifierDiscoveryResult>();
			}

			// Filter disallowed endpoints.
			serviceEndpoints = relyingParty.SecuritySettings.FilterEndpoints(serviceEndpoints);

			// Call another method that defers request generation.
			return CreateInternal(userSuppliedIdentifier, relyingParty, realm, returnToUrl, serviceEndpoints, createNewAssociationsAsNeeded);
		}

        /// <summary>
        /// Performs identifier discovery, creates associations and generates authentication requests
        /// on-demand for as long as new ones can be generated based on the results of Identifier discovery.
        /// </summary>
        /// <param name="userSuppliedIdentifier">The user supplied identifier.</param>
        /// <param name="relyingParty">The relying party.</param>
        /// <param name="realm">The realm.</param>
        /// <param name="returnToUrl">The return_to base URL.</param>
        /// <param name="createNewAssociationsAsNeeded">if set to <c>true</c>, associations that do not exist between this Relying Party and the asserting Providers are created before the authentication request is created.</param>
        /// <returns>
        /// A sequence of authentication requests, any of which constitutes a valid identity assertion on the Claimed Identifier.
        /// Never null, but may be empty.
        /// </returns>
        internal static IEnumerable<AuthenticationRequest> Create(Identifier userSuppliedIdentifier, OpenIdRelyingParty relyingParty, Realm realm, Uri returnToUrl, bool createNewAssociationsAsNeeded)
        {
            Contract.Requires(userSuppliedIdentifier != null);
            Contract.Requires(relyingParty != null);
            Contract.Requires(realm != null);
            Contract.Ensures(Contract.Result<IEnumerable<AuthenticationRequest>>() != null);

            // We have a long data validation and preparation process
            ErrorUtilities.VerifyArgumentNotNull(userSuppliedIdentifier, "userSuppliedIdentifier");
            ErrorUtilities.VerifyArgumentNotNull(relyingParty, "relyingParty");
            ErrorUtilities.VerifyArgumentNotNull(realm, "realm");

            // Normalize the portion of the return_to path that correlates to the realm for capitalization.
            // (so that if a web app base path is /MyApp/, but the URL of this request happens to be
            // /myapp/login.aspx, we bump up the return_to Url to use /MyApp/ so it matches the realm.
            UriBuilder returnTo = new UriBuilder(returnToUrl);
            if (returnTo.Path.StartsWith(realm.AbsolutePath, StringComparison.OrdinalIgnoreCase) &&
                !returnTo.Path.StartsWith(realm.AbsolutePath, StringComparison.Ordinal)) {
                returnTo.Path = realm.AbsolutePath + returnTo.Path.Substring(realm.AbsolutePath.Length);
                returnToUrl = returnTo.Uri;
            }

            userSuppliedIdentifier = userSuppliedIdentifier.TrimFragment();
            if (relyingParty.SecuritySettings.RequireSsl) {
                // Rather than check for successful SSL conversion at this stage,
                // We'll wait for secure discovery to fail on the new identifier.
                if (!userSuppliedIdentifier.TryRequireSsl(out userSuppliedIdentifier)) {
                    // But at least log the failure.
                    Logger.OpenId.WarnFormat("RequireSsl mode is on, so discovery on insecure identifier {0} will yield no results.", userSuppliedIdentifier);
                }
            }

            if (Logger.OpenId.IsWarnEnabled && returnToUrl.Query != null) {
                NameValueCollection returnToArgs = HttpUtility.ParseQueryString(returnToUrl.Query);
                foreach (string key in returnToArgs) {
                    if (OpenIdRelyingParty.IsOpenIdSupportingParameter(key)) {
                        Logger.OpenId.WarnFormat("OpenID argument \"{0}\" found in return_to URL.  This can corrupt an OpenID response.", key);
                    }
                }
            }

            // Throw an exception now if the realm and the return_to URLs don't match
            // as required by the provider.  We could wait for the provider to test this and
            // fail, but this will be faster and give us a better error message.
            ErrorUtilities.VerifyProtocol(realm.Contains(returnToUrl), OpenIdStrings.ReturnToNotUnderRealm, returnToUrl, realm);

            // Perform discovery right now (not deferred).
            IEnumerable<ServiceEndpoint> serviceEndpoints;
            try {
                serviceEndpoints = userSuppliedIdentifier.Discover(relyingParty.WebRequestHandler);
            } catch (ProtocolException ex) {
                Logger.Yadis.ErrorFormat("Error while performing discovery on: \"{0}\": {1}", userSuppliedIdentifier, ex);
                serviceEndpoints = EmptyList<ServiceEndpoint>.Instance;
            }

            // Filter disallowed endpoints.
            serviceEndpoints = relyingParty.SecuritySettings.FilterEndpoints(serviceEndpoints);

            // Call another method that defers request generation.
            return CreateInternal(userSuppliedIdentifier, relyingParty, realm, returnToUrl, serviceEndpoints, createNewAssociationsAsNeeded);
        }