netwerk/base/nsURLHelperWin.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=4 sw=2 et cindent: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /* Windows-specific local file uri parsing */
   8 #include "nsURLHelper.h"
   9 #include "nsEscape.h"
  10 #include "nsIFile.h"
  11 #include <windows.h>
  12
  13 nsresult net_GetURLSpecFromActualFile(nsIFile *aFile, nsACString &result) {
  14   nsresult rv;
  15   nsAutoString path;
  16
  17   // construct URL spec from file path
  18   rv = aFile->GetPath(path);
  19   if (NS_FAILED(rv)) return rv;
  20
  21   // Replace \ with / to convert to an url
  22   path.ReplaceChar(char16_t(0x5Cu), char16_t(0x2Fu));
  23
  24   nsAutoCString escPath;
  25
  26   // Windows Desktop paths begin with a drive letter, so need an 'extra'
  27   // slash at the begining
  28   // C:\Windows =>  file:///C:/Windows
  29   NS_NAMED_LITERAL_CSTRING(prefix, "file:///");
  30
  31   // Escape the path with the directory mask
  32   NS_ConvertUTF16toUTF8 ePath(path);
  33   if (NS_EscapeURL(ePath.get(), -1, esc_Directory + esc_Forced, escPath))
  34     escPath.Insert(prefix, 0);
  35   else
  36     escPath.Assign(prefix + ePath);
  37
  38   // esc_Directory does not escape the semicolons, so if a filename
  39   // contains semicolons we need to manually escape them.
  40   // This replacement should be removed in bug #473280
  41   escPath.ReplaceSubstring(";", "%3b");
  42
  43   result = escPath;
  44   return NS_OK;
  45 }
  46
  47 nsresult net_GetFileFromURLSpec(const nsACString &aURL, nsIFile **result) {
  48   nsresult rv;
  49
  50   if (aURL.Length() > (uint32_t)net_GetURLMaxLength()) {
  51     return NS_ERROR_MALFORMED_URI;
  52   }
  53
  54   nsCOMPtr<nsIFile> localFile(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv));
  55   if (NS_FAILED(rv)) {
  56     NS_ERROR("Only nsIFile supported right now");
  57     return rv;
  58   }
  59
  60   localFile->SetFollowLinks(true);
  61
  62   const nsACString *specPtr;
  63
  64   nsAutoCString buf;
  65   if (net_NormalizeFileURL(aURL, buf))
  66     specPtr = &buf;
  67   else
  68     specPtr = &aURL;
  69
  70   nsAutoCString directory, fileBaseName, fileExtension;
  71
  72   rv = net_ParseFileURL(*specPtr, directory, fileBaseName, fileExtension);
  73   if (NS_FAILED(rv)) return rv;
  74
  75   nsAutoCString path;
  76
  77   if (!directory.IsEmpty()) {
  78     NS_EscapeURL(directory, esc_Directory | esc_AlwaysCopy, path);
  79     if (path.Length() > 2 && path.CharAt(2) == '|') path.SetCharAt(':', 2);
  80     path.ReplaceChar('/', '\\');
  81   }
  82   if (!fileBaseName.IsEmpty())
  83     NS_EscapeURL(fileBaseName, esc_FileBaseName | esc_AlwaysCopy, path);
  84   if (!fileExtension.IsEmpty()) {
  85     path += '.';
  86     NS_EscapeURL(fileExtension, esc_FileExtension | esc_AlwaysCopy, path);
  87   }
  88
  89   NS_UnescapeURL(path);
  90   if (path.Length() != strlen(path.get())) return NS_ERROR_FILE_INVALID_PATH;
  91
  92   // remove leading '\'
  93   if (path.CharAt(0) == '\\') path.Cut(0, 1);
  94
  95   if (IsUTF8(path)) rv = localFile->InitWithPath(NS_ConvertUTF8toUTF16(path));
  96   // XXX In rare cases, a valid UTF-8 string can be valid as a native
  97   // encoding (e.g. 0xC5 0x83 is valid both as UTF-8 and Windows-125x).
  98   // However, the chance is very low that a meaningful word in a legacy
  99   // encoding is valid as UTF-8.
 100   else
 101     // if path is not in UTF-8, assume it is encoded in the native charset
 102     rv = localFile->InitWithNativePath(path);
 103
 104   if (NS_FAILED(rv)) return rv;
 105
 106   localFile.forget(result);
 107   return NS_OK;
 108 }