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using System;
using System.Collections.Specialized;
using System.Text;
namespace Janrain.OpenId.Server
{
public class EncodingException : ApplicationException
{
#region Private Members
private IEncodable _response;
#endregion
#region Constructor(s)
public EncodingException(IEncodable response)
{
_response = response;
}
#endregion
#region Properties
public IEncodable Response
{
get { return _response; }
}
#endregion
}
public class AlreadySignedException : EncodingException
{
public AlreadySignedException(IEncodable response)
: base(response)
{
}
}
public class Encoder
{
#region Constructor(s)
public Encoder() { }
#endregion
#region Methods
public virtual WebResponse Encode(IEncodable response)
{
EncodingType encode_as = response.WhichEncoding;
WebResponse wr;
#region Trace
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace(String.Format("Encode using {0}", encode_as));
}
#endregion
if (encode_as == EncodingType.ENCODE_KVFORM)
{
HttpCode code;
if (response is Exception)
code = HttpCode.HTTP_ERROR;
else
code = HttpCode.HTTP_OK;
wr = new WebResponse(code, null, response.EncodeToKVForm());
}
else if (encode_as == EncodingType.ENCODE_URL)
{
NameValueCollection headers = new NameValueCollection();
headers.Add("Location", response.EncodeToUrl().AbsoluteUri);
wr = new WebResponse(HttpCode.HTTP_REDIRECT, headers, new byte[0]);
}
else
{
throw new EncodingException(response);
}
return wr;
}
#endregion
}
public class SigningEncoder : Encoder
{
#region Private Members
private Signatory _signatory;
#endregion
#region Constructor(s)
public SigningEncoder(Signatory signatory)
{
_signatory = signatory;
}
#endregion
#region Methods
public override WebResponse Encode(IEncodable encodable)
{
if (!(encodable is Exception))
{
#region Trace
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("Encoding using the signing encoder");
}
#endregion
Response response = (Response)encodable;
if (response.NeedsSigning)
{
if (_signatory == null)
throw new ArgumentException("Must have a store to sign this request");
if (response.Fields.Contains(QueryStringArgs.openidnp.sig))
throw new AlreadySignedException(encodable);
_signatory.Sign(response);
}
}
return base.Encode(encodable);
}
#endregion
}
public class Decoder
{
#region Private Members
private static string[] _handlers = { };
#endregion
#region Methods
public static Request Decode(NameValueCollection query)
{
#region Trace
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("Start message decoding");
}
#endregion
if (query == null) return null;
NameValueCollection myquery = new NameValueCollection();
foreach (string key in query)
{
if (!String.IsNullOrEmpty(key))
{
if (key.StartsWith(QueryStringArgs.openid.Prefix)) { myquery[key] = query[key]; }
}
}
if (myquery.Count == 0) return null;
string mode = myquery.Get(QueryStringArgs.openid.mode);
if (mode == null)
throw new ProtocolException(query, "No openid.mode value in query");
if (mode == QueryStringArgs.Modes.checkid_setup)
{
CheckIdRequest request = new CheckIdRequest(query);
#region Trace
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("End message decoding. Successfully decoded message as new CheckIdRequest in setup mode");
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("CheckIdRequest follows: ");
TraceUtil.ServerTrace(request.ToString());
}
}
#endregion
return request;
}
else if (mode == QueryStringArgs.Modes.checkid_immediate)
{
CheckIdRequest request = new CheckIdRequest(query);
#region Trace
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("End message decoding. Successfully decoded message as new CheckIdRequest in immediate mode");
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("CheckIdRequest follows: ");
TraceUtil.ServerTrace(request.ToString());
}
}
#endregion
return request;
}
else if (mode == QueryStringArgs.Modes.check_authentication)
{
CheckAuthRequest request = new CheckAuthRequest(query);
#region Trace
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("End message decoding. Successfully decoded message as new CheckAuthRequest");
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("CheckAuthRequest follows: ");
TraceUtil.ServerTrace(request.ToString());
}
}
#endregion
return request;
}
else if (mode == QueryStringArgs.Modes.associate)
{
AssociateRequest request = new AssociateRequest(query);
#region Trace
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("End message decoding. Successfully decoded message as new AssociateRequest ");
if (TraceUtil.Switch.TraceInfo)
{
TraceUtil.ServerTrace("AssociateRequest follows: ");
TraceUtil.ServerTrace(request.ToString());
}
}
#endregion
return request;
}
throw new ProtocolException(query, "No decoder for openid.mode=" + mode);
}
#endregion
}
}
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