C# HttpRequestMessage.GetRecipient方法代碼示例

		/// <summary>
		/// Gets the protocol message that may be embedded in the given HTTP request.
		/// </summary>
		/// <param name="request">The request to search for an embedded message.</param>
		/// <param name="cancellationToken">The cancellation token.</param>
		/// <returns>
		/// The deserialized message, if one is found.  Null otherwise.
		/// </returns>
		protected override async Task<IDirectedProtocolMessage> ReadFromRequestCoreAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
			Requires.NotNull(request, "request");

			var fields = new Dictionary<string, string>();
			string accessToken;
			if ((accessToken = await SearchForBearerAccessTokenInRequestAsync(request, cancellationToken)) != null) {
				fields[Protocol.token_type] = Protocol.AccessTokenTypes.Bearer;
				fields[Protocol.access_token] = accessToken;
			}

			if (fields.Count > 0) {
				MessageReceivingEndpoint recipient;
				try {
					recipient = request.GetRecipient();
				} catch (ArgumentException ex) {
					Logger.OAuth.WarnFormat("Unrecognized HTTP request: " + ex.ToString());
					return null;
				}

				// Deserialize the message using all the data we've collected.
				var message = (IDirectedProtocolMessage)this.Receive(fields, recipient);
				return message;
			}

			return null;
		}

		/// <summary>
		/// Searches an incoming HTTP request for data that could be used to assemble
		/// a protocol request message.
		/// </summary>
		/// <param name="request">The HTTP request to search.</param>
		/// <param name="cancellationToken">The cancellation token.</param>
		/// <returns>The deserialized message, if one is found.  Null otherwise.</returns>
		protected override async Task<IDirectedProtocolMessage> ReadFromRequestCoreAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
			// First search the Authorization header.
			var authorization = request.Headers.Authorization;
			var fields = MessagingUtilities.ParseAuthorizationHeader(Protocol.AuthorizationHeaderScheme, authorization).ToDictionary();
			fields.Remove("realm"); // ignore the realm parameter, since we don't use it, and it must be omitted from signature base string.

			// Scrape the entity
			foreach (var pair in await ParseUrlEncodedFormContentAsync(request, cancellationToken)) {
				if (pair.Key != null) {
					fields.Add(pair.Key, pair.Value);
				} else {
					Logger.OAuth.WarnFormat("Ignoring query string parameter '{0}' since it isn't a standard name=value parameter.", pair.Value);
				}
			}

			// Scrape the query string
			var qs = HttpUtility.ParseQueryString(request.RequestUri.Query);
			foreach (string key in qs) {
				if (key != null) {
					fields.Add(key, qs[key]);
				} else {
					Logger.OAuth.WarnFormat("Ignoring query string parameter '{0}' since it isn't a standard name=value parameter.", qs[key]);
				}
			}

			MessageReceivingEndpoint recipient;
			try {
				recipient = request.GetRecipient();
			} catch (ArgumentException ex) {
				Logger.OAuth.WarnFormat("Unrecognized HTTP request: " + ex.ToString());
				return null;
			}

			// Deserialize the message using all the data we've collected.
			var message = (IDirectedProtocolMessage)this.Receive(fields, recipient);

			// Add receiving HTTP transport information required for signature generation.
			var signedMessage = message as ITamperResistantOAuthMessage;
			if (signedMessage != null) {
				signedMessage.Recipient = request.RequestUri;
				signedMessage.HttpMethod = request.Method;
			}

			return message;
		}

		/// <summary>
		/// Gets the protocol message that may be embedded in the given HTTP request.
		/// </summary>
		/// <param name="request">The request to search for an embedded message.</param>
		/// <param name="cancellationToken">The cancellation token.</param>
		/// <returns>
		/// The deserialized message, if one is found.  Null otherwise.
		/// </returns>
		protected override async Task<IDirectedProtocolMessage> ReadFromRequestCoreAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
			Requires.NotNull(request, "request");

			Logger.Channel.DebugFormat("Incoming HTTP request: {0} {1}", request.Method, request.RequestUri.AbsoluteUri);

			var fields = HttpUtility.ParseQueryString(request.RequestUri.Query).ToDictionary();

			// Also read parameters from the fragment, if it's available.
			// Typically the fragment is not available because the browser doesn't send it to a web server
			// but this request may have been fabricated by an installed desktop app, in which case
			// the fragment is available.
			string fragment = request.RequestUri.Fragment;
			if (!string.IsNullOrEmpty(fragment)) {
				foreach (var pair in HttpUtility.ParseQueryString(fragment.Substring(1)).AsKeyValuePairs()) {
					fields.Add(pair.Key, pair.Value);
				}
			}

			MessageReceivingEndpoint recipient;
			try {
				recipient = request.GetRecipient();
			} catch (ArgumentException ex) {
				Logger.Messaging.WarnFormat("Unrecognized HTTP request: ", ex);
				return null;
			}

			return (IDirectedProtocolMessage)this.Receive(fields, recipient);
		}

		/// <summary>
		/// Gets the protocol message that may be embedded in the given HTTP request.
		/// </summary>
		/// <param name="request">The request to search for an embedded message.</param>
		/// <param name="cancellationToken">The cancellation token.</param>
		/// <returns>
		/// The deserialized message, if one is found.  Null otherwise.
		/// </returns>
		protected override async Task<IDirectedProtocolMessage> ReadFromRequestCoreAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
			Requires.NotNull(request, "request");

			if (!string.IsNullOrEmpty(request.RequestUri.Fragment)) {
				var fields = HttpUtility.ParseQueryString(request.RequestUri.Fragment.Substring(1)).ToDictionary();

				MessageReceivingEndpoint recipient;
				try {
					recipient = request.GetRecipient();
				} catch (ArgumentException ex) {
					Logger.Messaging.WarnFormat("Unrecognized HTTP request: " + ex.ToString());
					return null;
				}

				return (IDirectedProtocolMessage)this.Receive(fields, recipient);
			}

			return await base.ReadFromRequestCoreAsync(request, cancellationToken);
		}