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 "nsComponentManagerUtils.h"
   9 #include "nsURLHelper.h"
  10 #include "nsEscape.h"
  11 #include "nsIFile.h"
  12 #include <windows.h>
  13 #include "mozilla/StaticPrefs_network.h"
  14 #include "mozilla/Utf8.h"
  15
  16 using namespace mozilla;
  17
  18 nsresult net_GetURLSpecFromActualFile(nsIFile* aFile, nsACString& result) {
  19   nsresult rv;
  20   nsAutoString path;
  21
  22   // construct URL spec from file path
  23   rv = aFile->GetPath(path);
  24   if (NS_FAILED(rv)) return rv;
  25
  26   // Replace \ with / to convert to an url
  27   path.ReplaceChar(char16_t(0x5Cu), char16_t(0x2Fu));
  28
  29   nsAutoCString escPath;
  30
  31   // Windows Desktop paths begin with a drive letter, so need an 'extra'
  32   // slash at the begining
  33   // C:\Windows =>  file:///C:/Windows
  34   constexpr auto prefix = "file:///"_ns;
  35
  36   // Escape the path with the directory mask
  37   NS_ConvertUTF16toUTF8 ePath(path);
  38   if (NS_EscapeURL(ePath.get(), -1, esc_Directory + esc_Forced, escPath))
  39     escPath.Insert(prefix, 0);
  40   else
  41     escPath.Assign(prefix + ePath);
  42
  43   // esc_Directory does not escape the semicolons, so if a filename
  44   // contains semicolons we need to manually escape them.
  45   // This replacement should be removed in bug #473280
  46   escPath.ReplaceSubstring(";", "%3b");
  47
  48   result = escPath;
  49   return NS_OK;
  50 }
  51
  52 nsresult net_GetFileFromURLSpec(const nsACString& aURL, nsIFile** result) {
  53   nsresult rv;
  54
  55   if (aURL.Length() > StaticPrefs::network_standard_url_max_length()) {
  56     return NS_ERROR_MALFORMED_URI;
  57   }
  58
  59   nsCOMPtr<nsIFile> localFile(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv));
  60   if (NS_FAILED(rv)) {
  61     NS_ERROR("Only nsIFile supported right now");
  62     return rv;
  63   }
  64
  65   const nsACString* specPtr;
  66
  67   nsAutoCString buf;
  68   if (net_NormalizeFileURL(aURL, buf))
  69     specPtr = &buf;
  70   else
  71     specPtr = &aURL;
  72
  73   nsAutoCString directory, fileBaseName, fileExtension;
  74
  75   rv = net_ParseFileURL(*specPtr, directory, fileBaseName, fileExtension);
  76   if (NS_FAILED(rv)) return rv;
  77
  78   nsAutoCString path;
  79
  80   if (!directory.IsEmpty()) {
  81     NS_EscapeURL(directory, esc_Directory | esc_AlwaysCopy, path);
  82     if (path.Length() > 2 && path.CharAt(2) == '|') path.SetCharAt(':', 2);
  83     path.ReplaceChar('/', '\\');
  84   }
  85   if (!fileBaseName.IsEmpty())
  86     NS_EscapeURL(fileBaseName, esc_FileBaseName | esc_AlwaysCopy, path);
  87   if (!fileExtension.IsEmpty()) {
  88     path += '.';
  89     NS_EscapeURL(fileExtension, esc_FileExtension | esc_AlwaysCopy, path);
  90   }
  91
  92   NS_UnescapeURL(path);
  93   if (path.Length() != strlen(path.get())) return NS_ERROR_FILE_INVALID_PATH;
  94
  95   // remove leading '\'
  96   if (path.CharAt(0) == '\\') path.Cut(0, 1);
  97
  98   if (IsUtf8(path)) rv = localFile->InitWithPath(NS_ConvertUTF8toUTF16(path));
  99   // XXX In rare cases, a valid UTF-8 string can be valid as a native
 100   // encoding (e.g. 0xC5 0x83 is valid both as UTF-8 and Windows-125x).
 101   // However, the chance is very low that a meaningful word in a legacy
 102   // encoding is valid as UTF-8.
 103   else
 104     // if path is not in UTF-8, assume it is encoded in the native charset
 105     rv = localFile->InitWithNativePath(path);
 106
 107   if (NS_FAILED(rv)) return rv;
 108
 109   localFile.forget(result);
 110   return NS_OK;
 111 }