DavPropFindBase.cs :  » Network-Servers » WebDAV.NET-Server » Sphorium » WebDAV » Server » Framework » BaseClasses » C# / CSharp Open Source

using System;
using System.IO;
using System.Xml.XPath;
using System.Globalization;

using Sphorium.WebDAV.Server.Framework.Resources;
using Sphorium.WebDAV.Server.Framework.Collections;

namespace Sphorium.WebDAV.Server.Framework.BaseClasses{
  /// <summary>
  /// Dav Resource PROPFIND Framework Base Class
  /// </summary>
  /// <remarks>
  ///    RFC2518 Compliant
  ///    
  ///    <code>
  ///    The ProcessDavRequest event must follow the following rules addressed in RFC2518
  ///      http://www.webdav.org/specs/rfc2518.html#METHOD_PROPFIND
  ///    </code>
  ///    
  ///    <code>
  ///      Returns ServerResponseCode.MultiStatus when successful
  ///    </code>
  ///    <seealso cref="DavMethodBase.AbortRequest(System.Enum)"/>
  /// </remarks>  
  public abstract class DavPropFindBase : DavResourceFindBase
  {
    /// <summary>
    /// Dav Resource PROPFIND Framework Base Class
    /// </summary>
    protected DavPropFindBase()
    {
      //Make sure the dav processing
      this.InternalProcessDavRequest += new DavInternalProcessHandler(DavPropFindBase_InternalProcessDavRequest);
      this.ValidateDavRequest += new DavRequestValidator(DavPropFindBase_ValidateDavRequest);

      this.RequestPropertyType = PropertyRequestType.None;
    }

    /// <summary>
    /// Property request types
    /// </summary>
    protected enum PropertyRequestType
    {
      /// <summary>
      /// No properties requested
      /// </summary>
      None,

      /// <summary>
      /// Specific properties requested
      /// <seealso cref="DavResourceFindBase.RequestProperties"/>
      /// </summary>
      NamedProperties,

      /// <summary>
      /// A summary of all the available properties
      /// </summary>
      PropertyNames,

      /// <summary>
      /// All properties requested
      /// </summary>
      AllProperties
    }

    /// <summary>
    /// Requested Property type
    /// <seealso cref="PropertyRequestType"/>
    /// </summary>
    protected PropertyRequestType RequestPropertyType { get; private set; }

    private int DavPropFindBase_ValidateDavRequest(object sender, EventArgs e)
    {
      int _returnCode = (int)ServerResponseCode.Ok;

      //Clear out all the collection resources
      base.FileResources.Clear();
      base.CollectionResources.Clear();

      //NOTE: An empty PROPFIND request body MUST be treated as a request for the names 
      //  and values of all properties.
      if (base.RequestXml == null)
        this.RequestPropertyType = PropertyRequestType.AllProperties;

      else
      {
        XPathNodeIterator _propFindNodeIterator = base.RequestXml.SelectDescendants("propfind", "DAV:", false);
        if (_propFindNodeIterator.MoveNext())
        {
          if (_propFindNodeIterator.Current.MoveToFirstChild())
          {
            switch (_propFindNodeIterator.Current.LocalName.ToLower(CultureInfo.InvariantCulture))
            {
              case "propnames":
                this.RequestPropertyType = PropertyRequestType.PropertyNames;
                break;
              case "allprop":
                this.RequestPropertyType = PropertyRequestType.AllProperties;
                break;
              default:
                this.RequestPropertyType = PropertyRequestType.NamedProperties;
                break;
            }
          }
          else
            _returnCode = (int)ServerResponseCode.BadRequest;
        }
        else
          _returnCode = (int)ServerResponseCode.BadRequest;
      }

      //Write to the debug log
      InternalFunctions.WriteDebugLog("DavPropFindBase: PropertyRequestType - " + this.RequestPropertyType);
      return _returnCode;
    }


    private int DavPropFindBase_InternalProcessDavRequest(object sender, EventArgs e)
    {
      int _returnCode = (int)ServerResponseCode.BadRequest;

      switch (this.RequestPropertyType)
      {
        case PropertyRequestType.AllProperties:
          ////Fix for XP Web Folder mini-redirector
          //if (this.CollectionResources.Count == 0 && base.HttpApplication.Request.UserAgent == "Microsoft Data Access Internet Publishing Provider DAV")
          //{
          //    DavFolder _rootFolder = new DavFolder("", "/");
          //    this.CollectionResources.Add(_rootFolder);
          //}

          if (this.ResourceCount == 0)
            _returnCode = (int)ServerResponseCode.NotFound;
          else
            _returnCode = base.LoadNodes(null);
          break;

        case PropertyRequestType.NamedProperties:
          ////Fix for XP Web Folder mini-redirector
          //if (this.CollectionResources.Count == 0 && base.HttpApplication.Request.UserAgent == "Microsoft Data Access Internet Publishing Provider DAV")
          //{
          //    DavFolder _rootFolder = new DavFolder("", "/");
          //    this.CollectionResources.Add(_rootFolder);
          //}

          if (this.ResourceCount == 0)
            _returnCode = (int)ServerResponseCode.NotFound;
          else
            _returnCode = base.LoadNodes(base.RequestProperties);
          break;

        case PropertyRequestType.PropertyNames:
          _returnCode = base.LoadNodePropertyNames();
          break;
      }

      return _returnCode;
    }
  }
}