Core/Castle.Core/Resource/UncResource.cs

   1 // Copyright 2004-2008 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.Core.Resource
  16 {
  17         using System;
  18         using System.IO;
  19
  20         /// <summary>
  21         /// Enable access to files on network shares
  22         /// </summary>
  23         public class UncResource : AbstractStreamResource
  24         {
  25                 private String basePath;
  26                 private string filePath;
  27
  28                 public UncResource(CustomUri resource)
  29                 {
  30                         CreateStream = delegate
  31                         {
  32                                 return CreateStreamFromUri(resource, DefaultBasePath);
  33                         };
  34                 }
  35
  36                 public UncResource(CustomUri resource, String basePath)
  37                 {
  38                         CreateStream = delegate
  39                         {
  40                                 return CreateStreamFromUri(resource, basePath);
  41                         };
  42                 }
  43
  44                 public UncResource(String resourceName) : this(new CustomUri(resourceName))
  45                 {
  46                 }
  47
  48                 public UncResource(String resourceName, String basePath) : this(new CustomUri(resourceName), basePath)
  49                 {
  50                 }
  51
  52                 public override String FileBasePath
  53                 {
  54                         get { return basePath; }
  55                 }
  56
  57                 public override IResource CreateRelative(String resourceName)
  58                 {
  59                         return new UncResource(Path.Combine(basePath, resourceName));
  60                 }
  61
  62                 public override string ToString()
  63                 {
  64                         return String.Format("UncResource: [{0}] [{1}]", filePath, basePath);
  65                 }
  66
  67                 private Stream CreateStreamFromUri(CustomUri resource, String basePath)
  68                 {
  69                         if (resource == null)
  70                                 throw new ArgumentNullException("resource");
  71                         if (!resource.IsUnc)
  72                                 throw new ArgumentException("Resource must be an Unc", "resource");
  73                         if (!resource.IsFile)
  74                                 throw new ArgumentException("The specified resource is not a file", "resource");
  75
  76                         String filePath = resource.Path;
  77
  78                         if (!File.Exists(filePath) && basePath != null)
  79                         {
  80                                 filePath = Path.Combine(basePath, filePath);
  81                         }
  82
  83                         this.filePath = Path.GetFileName(filePath);
  84                         this.basePath = Path.GetDirectoryName(filePath);
  85
  86                         CheckFileExists(filePath);
  87
  88                         return File.OpenRead(filePath);
  89                 }
  90
  91                 private void CheckFileExists(String path)
  92                 {
  93                         if (!File.Exists(path))
  94                         {
  95                                 String message = String.Format("File {0} could not be found", path);
  96                                 throw new ResourceException(message);
  97                         }
  98                 }
  99         }
 100 }