Core/Castle.Core/Resource/UncResource.cs

   1 // Copyright 2004-2007 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 readonly Stream stream;
  26                 private String basePath;
  27                 private string filePath;
  28
  29                 public UncResource(CustomUri resource)
  30                 {
  31                         stream = CreateStreamFromUri(resource, DefaultBasePath);
  32                 }
  33
  34                 public UncResource(CustomUri resource, String basePath)
  35                 {
  36                         stream = CreateStreamFromUri(resource, basePath);
  37                 }
  38
  39                 public UncResource(String resourceName) : this(new CustomUri(resourceName))
  40                 {
  41                 }
  42
  43                 public UncResource(String resourceName, String basePath) : this(new CustomUri(resourceName), basePath)
  44                 {
  45                 }
  46
  47                 public override String FileBasePath
  48                 {
  49                         get { return basePath; }
  50                 }
  51
  52                 public override IResource CreateRelative(String resourceName)
  53                 {
  54                         return new UncResource(Path.Combine(basePath, resourceName));
  55                 }
  56
  57                 public override string ToString()
  58                 {
  59                         return String.Format("UncResource: [{0}] [{1}]", filePath, basePath);
  60                 }
  61
  62                 protected override Stream Stream
  63                 {
  64                         get { return stream; }
  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 }