wmsexception.cs

Sharp Map 用于制作GIS系统S harp Map 用于制作GIS系统S harp Map 用于制作GIS系统

// Copyright 2005, 2006 - Morten Nielsen (www.iter.dk)
//
// This file is part of SharpMap.
// SharpMap is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// SharpMap is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public License
// along with SharpMap; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;

namespace SharpMap.Web.Wms
{
	/// <summary>
	/// Class for throwing WMS exceptions to client
	/// </summary>
	internal class WmsException
	{
		/// <summary>
		/// WMS Exception codes
		/// </summary>
		internal enum WmsExceptionCode
		{
			/// <summary>
			/// Request contains a Format not offered by the server.
			/// </summary>
			InvalidFormat,
			/// <summary>
			/// Request contains a CRS not offered by the server for one or more of the
			/// Layers in the request.
			/// </summary>
			InvalidCRS,
			/// <summary>
			/// GetMap request is for a Layer not offered by the server, or GetFeatureInfo
			/// request is for a Layer not shown on the map.
			/// </summary>
			LayerNotDefined,
			/// <summary>
			/// Request is for a Layer in a Style not offered by the server.
			/// </summary>
			StyleNotDefined,
			/// <summary>
			/// GetFeatureInfo request is applied to a Layer which is not declared queryable.
			/// </summary>
			LayerNotQueryable,
			/// <summary>
			/// GetFeatureInfo request contains invalid X or Y value.
			/// </summary>
			InvalidPoint,
			/// <summary>
			/// Value of (optional) UpdateSequence parameter in GetCapabilities request is
			/// equal to current value of service metadata update sequence number.
			/// </summary>
			CurrentUpdateSequence,
			/// <summary>
			/// Value of (optional) UpdateSequence parameter in GetCapabilities request is
			/// greater than current value of service metadata update sequence number.
			/// </summary>
			InvalidUpdateSequence,
			/// <summary>
			/// Request does not include a sample dimension value, and the server did not
			/// declare a default value for that dimension.
			/// </summary>
			MissingDimensionValue,
			/// <summary>
			/// Request contains an invalid sample dimension value.
			/// </summary>
			InvalidDimensionValue,
			/// <summary>
			/// Request is for an optional operation that is not supported by the server.
			/// </summary>
			OperationNotSupported,
			/// <summary>
			/// No error code
			/// </summary>
			NotApplicable
		}

		internal static void ThrowWmsException(string Message)
		{
			ThrowWmsException(WmsException.WmsExceptionCode.NotApplicable, Message);
		}

		internal static void ThrowWmsException(WmsExceptionCode code, string Message)
		{
			System.Web.HttpResponse Response = System.Web.HttpContext.Current.Response;
			Response.Clear();
			Response.ContentType = "text/xml";
			Response.Write("<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n");
			Response.Write("<ServiceExceptionReport version=\"1.3.0\" xmlns=\"http://www.opengis.net/ogc\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.opengis.net/ogc http://schemas.opengis.net/wms/1.3.0/exceptions_1_3_0.xsd\">\n");
			Response.Write("<ServiceException");
			if(code!=WmsExceptionCode.NotApplicable)
				Response.Write(" code=\"" + code.ToString() + "\"");
			Response.Write(">" + Message + "</ServiceException>\n");
			Response.Write("</ServiceExceptionReport>");
			Response.End();
		}

		//private static System.Xml.Schema.XmlSchema GetExceptionSchema()
		//{
		//    //Get XML Schema
		//    System.IO.Stream stream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("SharpMap.Web.Wms.Schemas._1._3._0.exceptions_1_3_0.xsd");
		//    System.Xml.Schema.XmlSchema schema = System.Xml.Schema.XmlSchema.Read(stream, null);
		//    stream.Close();
		//    return schema;
		//}
	}
}