XmlUrlResolver.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Xml / System / Xml / XmlUrlResolver.cs / 1305376 / XmlUrlResolver.cs

                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
using System.Threading; 
using System.Security.Permissions;
using System.Net; 
using System.Net.Cache;
using System.Runtime.Versioning;

namespace System.Xml { 

    // Resolves external XML resources named by a Uniform Resource Identifier (URI). 
    public class XmlUrlResolver : XmlResolver { 
        private static object s_DownloadManager;
        private ICredentials _credentials; 
        private IWebProxy _proxy;
        private RequestCachePolicy _cachePolicy;

        static XmlDownloadManager DownloadManager { 
            get {
                if ( s_DownloadManager == null ) { 
                    object dm = new XmlDownloadManager(); 
                    Interlocked.CompareExchange( ref s_DownloadManager, dm, null );
                } 
                return (XmlDownloadManager)s_DownloadManager;
            }
        }
 
        // Construction
 
        // Creates a new instance of the XmlUrlResolver class. 
        public XmlUrlResolver() {
        } 

        public override ICredentials Credentials {
            set { _credentials = value; }
        } 

        public IWebProxy Proxy { 
            set { _proxy = value; } 
        }
 
        public RequestCachePolicy CachePolicy {
            set { _cachePolicy = value; }
        }
 
        // Resource resolution
 
        // Maps a URI to an Object containing the actual resource. 
        [ResourceConsumption(ResourceScope.Machine)]
        [ResourceExposure(ResourceScope.Machine)] 
        public override Object GetEntity(Uri absoluteUri, string role, Type ofObjectToReturn) {
            if (ofObjectToReturn == null || ofObjectToReturn == typeof(System.IO.Stream) || ofObjectToReturn == typeof(System.Object)) {
                return DownloadManager.GetStream(absoluteUri, _credentials, _proxy, _cachePolicy);
            } 
            else {
                throw new XmlException(Res.Xml_UnsupportedClass, string.Empty); 
            } 
        }
 
        [PermissionSetAttribute(SecurityAction.InheritanceDemand, Name = "FullTrust")]
        [ResourceConsumption(ResourceScope.Machine)]
        [ResourceExposure(ResourceScope.Machine)]
        public override Uri ResolveUri(Uri baseUri, string relativeUri){ 
            return base.ResolveUri(baseUri, relativeUri);
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

                        

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