/// <summary>
/// Prepares to send a request to the Service Provider as the query string in a GET request.
/// </summary>
/// <param name="requestMessage">The message to be transmitted to the ServiceProvider.</param>
/// <returns>The web request ready to send.</returns>
/// <remarks>
/// This method is simply a standard HTTP Get request with the message parts serialized to the query string.
/// This method satisfies OAuth 1.0 section 5.2, item #3.
/// </remarks>
protected virtual HttpWebRequest InitializeRequestAsGet(IDirectedProtocolMessage requestMessage)
{
ErrorUtilities.VerifyArgumentNotNull(requestMessage, "requestMessage");
var serializer = MessageSerializer.Get(requestMessage.GetType());
var fields = serializer.Serialize(requestMessage);
UriBuilder builder = new UriBuilder(requestMessage.Recipient);
MessagingUtilities.AppendQueryArgs(builder, fields);
HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(builder.Uri);
return(httpRequest);
}
/// <summary>
/// Gets the URI that, when requested with an HTTP GET request,
/// would transmit the message that normally would be transmitted via a user agent redirect.
/// </summary>
/// <param name="channel">The channel to use for encoding.</param>
/// <returns>
/// The URL that would transmit the original message. This URL may exceed the normal 2K limit,
/// and should therefore be broken up manually and POSTed as form fields when it exceeds this length.
/// </returns>
/// <remarks>
/// This is useful for desktop applications that will spawn a user agent to transmit the message
/// rather than cause a redirect.
/// </remarks>
internal Uri GetDirectUriRequest(Channel channel)
{
Requires.NotNull(channel, "channel");
var message = this.OriginalMessage as IDirectedProtocolMessage;
if (message == null)
{
throw new InvalidOperationException(); // this only makes sense for directed messages (indirect responses)
}
var fields = channel.MessageDescriptions.GetAccessor(message).Serialize();
UriBuilder builder = new UriBuilder(message.Recipient);
MessagingUtilities.AppendQueryArgs(builder, fields);
return(builder.Uri);
}
/// <summary>
/// Encodes an HTTP response that will instruct the user agent to forward a message to
/// some remote third party using a 301 Redirect GET method.
/// </summary>
/// <param name="message">The message to forward.</param>
/// <param name="fields">The pre-serialized fields from the message.</param>
/// <returns>The encoded HTTP response.</returns>
protected virtual UserAgentResponse Create301RedirectResponse(IDirectedProtocolMessage message, IDictionary <string, string> fields)
{
ErrorUtilities.VerifyArgumentNotNull(message, "message");
ErrorUtilities.VerifyArgumentNamed(message.Recipient != null, "message", MessagingStrings.DirectedMessageMissingRecipient);
ErrorUtilities.VerifyArgumentNotNull(fields, "fields");
WebHeaderCollection headers = new WebHeaderCollection();
UriBuilder builder = new UriBuilder(message.Recipient);
MessagingUtilities.AppendQueryArgs(builder, fields);
headers.Add(HttpResponseHeader.Location, builder.Uri.AbsoluteUri);
Logger.DebugFormat("Redirecting to {0}", builder.Uri.AbsoluteUri);
UserAgentResponse response = new UserAgentResponse {
Status = HttpStatusCode.Redirect,
Headers = headers,
Body = null,
OriginalMessage = message
};
return(response);
}
