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// System.Xml.XmlUrlResolver.cs
//
// Author: Duncan Mak (duncan@ximian.com)
// Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
//
// (C) Ximian, Inc.
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Net;
using System.IO;
using System.Text;
namespace System.Xml
{
public class XmlUrlResolver : XmlResolver
{
// Constructor
public XmlUrlResolver ()
: base ()
{
}
// Methods
public override object GetEntity (Uri absoluteUri, string role, Type ofObjectToReturn)
{
if (ofObjectToReturn == null)
ofObjectToReturn = typeof (Stream);
if (ofObjectToReturn != typeof (Stream))
throw new XmlException ("This object type is not supported.");
if (!absoluteUri.IsAbsoluteUri)
throw new ArgumentException ("uri must be absolute.", "absoluteUri");
if (absoluteUri.Scheme == "file") {
if (absoluteUri.AbsolutePath == String.Empty)
throw new ArgumentException ("uri must be absolute.", "absoluteUri");
return new FileStream (UnescapeRelativeUriBody (absoluteUri.LocalPath), FileMode.Open, FileAccess.Read, FileShare.Read);
}
// (MS documentation says) parameter role isn't used yet.
//WebRequest req = WebRequest.Create (absoluteUri);
//return req.GetResponse().GetResponseStream();
return "";
}
public override Uri ResolveUri (Uri baseUri, string relativeUri)
{
return base.ResolveUri (baseUri, relativeUri);
}
// see also XmlResolver.EscapeRelativeUriBody().
private string UnescapeRelativeUriBody (string src)
{
return src.Replace ("%3C", "<")
.Replace ("%3E", ">")
.Replace ("%23", "#")
.Replace ("%22", "\"")
.Replace ("%20", " ")
.Replace ("%25", "%");
}
}
}
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