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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;
#if NET_4_5
using System.Net.Cache;
using System.Threading.Tasks;
#endif
namespace System.Xml
{
public class XmlUrlResolver : XmlResolver
{
// Field
ICredentials credential;
#if NET_4_5
RequestCachePolicy cachePolicy;
IWebProxy proxy;
#endif
// Constructor
public XmlUrlResolver ()
: base ()
{
}
// Properties
public override ICredentials Credentials
{
set { credential = value; }
}
#if NET_4_5
public RequestCachePolicy CachePolicy {
set { cachePolicy = value; }
}
public IWebProxy Proxy {
set { proxy = value; }
}
#endif
// 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 NET_2_0
if (!absoluteUri.IsAbsoluteUri)
throw new ArgumentException ("uri must be absolute.", "absoluteUri");
#endif
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);
#if NET_4_5
#if !NET_2_1
if (cachePolicy != null)
req.CachePolicy = cachePolicy;
#endif
if (proxy != null)
req.Proxy = proxy;
#endif
if (credential != null)
req.Credentials = credential;
return req.GetResponse().GetResponseStream();
}
#if NET_2_0
public override Uri ResolveUri (Uri baseUri, string relativeUri)
{
return base.ResolveUri (baseUri, relativeUri);
}
#endif
// see also XmlResolver.EscapeRelativeUriBody().
private string UnescapeRelativeUriBody (string src)
{
return src.Replace ("%3C", "<")
.Replace ("%3E", ">")
.Replace ("%23", "#")
.Replace ("%22", "\"")
.Replace ("%20", " ")
.Replace ("%25", "%");
}
#if NET_4_5
public override async Task<object> GetEntityAsync (
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);
#if !NET_2_1
if (cachePolicy != null)
req.CachePolicy = cachePolicy;
#endif
if (proxy != null)
req.Proxy = proxy;
if (credential != null)
req.Credentials = credential;
var res = await req.GetResponseAsync ().ConfigureAwait (false);
return res.GetResponseStream ();
}
#endif
}
}
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