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//-----------------------------------------------------------------------
// <copyright file="OAuthConsumerMessageFactory.cs" company="Andrew Arnott">
// Copyright (c) Andrew Arnott. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.OAuth.ChannelElements {
using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using DotNetOpenAuth.Messaging;
using DotNetOpenAuth.OAuth.Messages;
/// <summary>
/// An OAuth-protocol specific implementation of the <see cref="IMessageFactory"/>
/// interface.
/// </summary>
public class OAuthConsumerMessageFactory : IMessageFactory {
/// <summary>
/// Initializes a new instance of the <see cref="OAuthConsumerMessageFactory"/> class.
/// </summary>
protected internal OAuthConsumerMessageFactory() {
}
#region IMessageFactory Members
/// <summary>
/// Analyzes an incoming request message payload to discover what kind of
/// message is embedded in it and returns the type, or null if no match is found.
/// </summary>
/// <param name="recipient">The intended or actual recipient of the request message.</param>
/// <param name="fields">The name/value pairs that make up the message payload.</param>
/// <returns>
/// A newly instantiated <see cref="IProtocolMessage"/>-derived object that this message can
/// deserialize to. Null if the request isn't recognized as a valid protocol message.
/// </returns>
/// <remarks>
/// The request messages are:
/// UserAuthorizationResponse
/// </remarks>
public virtual IDirectedProtocolMessage GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary<string, string> fields) {
MessageBase message = null;
if (fields.ContainsKey("oauth_token")) {
Protocol protocol = fields.ContainsKey("oauth_verifier") ? Protocol.V10a : Protocol.V10;
message = new UserAuthorizationResponse(recipient.Location, protocol.Version);
}
if (message != null) {
message.SetAsIncoming();
}
return message;
}
/// <summary>
/// Analyzes an incoming request message payload to discover what kind of
/// message is embedded in it and returns the type, or null if no match is found.
/// </summary>
/// <param name="request">
/// The message that was sent as a request that resulted in the response.
/// Null on a Consumer site that is receiving an indirect message from the Service Provider.
/// </param>
/// <param name="fields">The name/value pairs that make up the message payload.</param>
/// <returns>
/// A newly instantiated <see cref="IProtocolMessage"/>-derived object that this message can
/// deserialize to. Null if the request isn't recognized as a valid protocol message.
/// </returns>
/// <remarks>
/// The response messages are:
/// UnauthorizedTokenResponse
/// AuthorizedTokenResponse
/// </remarks>
public virtual IDirectResponseProtocolMessage GetNewResponseMessage(IDirectedProtocolMessage request, IDictionary<string, string> fields) {
MessageBase message = null;
// All response messages have the oauth_token field.
if (!fields.ContainsKey("oauth_token")) {
return null;
}
// All direct message responses should have the oauth_token_secret field.
if (!fields.ContainsKey("oauth_token_secret")) {
Logger.OAuth.Error("An OAuth message was expected to contain an oauth_token_secret but didn't.");
return null;
}
var unauthorizedTokenRequest = request as UnauthorizedTokenRequest;
var authorizedTokenRequest = request as AuthorizedTokenRequest;
if (unauthorizedTokenRequest != null) {
Protocol protocol = fields.ContainsKey("oauth_callback_confirmed") ? Protocol.V10a : Protocol.V10;
message = new UnauthorizedTokenResponse(unauthorizedTokenRequest, protocol.Version);
} else if (authorizedTokenRequest != null) {
message = new AuthorizedTokenResponse(authorizedTokenRequest);
} else {
Logger.OAuth.ErrorFormat("Unexpected response message given the request type {0}", request.GetType().Name);
throw new ProtocolException(OAuthStrings.InvalidIncomingMessage);
}
if (message != null) {
message.SetAsIncoming();
}
return message;
}
#endregion
}
}
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