Move FileURLToFilePath into platform specific files. Most of the logic in this function is specific to windows' file system.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@1211 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 111 insertions, 0 deletions

diff --git a/net/base/net_util_win.cc b/net/base/net_util_win.cc
new file mode 100644
index 0000000..9295b7e
--- /dev/null
+++ b/net/base/net_util_win.cc
@@ -0,0 +1,111 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "net/base/net_util.h"
+
+#include "base/string_piece.h"
+#include "base/string_util.h"
+#include "base/sys_string_conversions.h"
+#include "googleurl/src/gurl.h"
+#include "net/base/escape.h"
+
+namespace net {
+
+bool FileURLToFilePath(const GURL& url, std::wstring* file_path) {
+  file_path->clear();
+
+  if (!url.is_valid())
+    return false;
+
+  std::string path;
+  std::string host = url.host();
+  if (host.empty()) {
+    // URL contains no host, the path is the filename. In this case, the path
+    // will probably be preceeded with a slash, as in "/C:/foo.txt", so we
+    // trim out that here.
+    path = url.path();
+    size_t first_non_slash = path.find_first_not_of("/\\");
+    if (first_non_slash != std::string::npos && first_non_slash > 0)
+      path.erase(0, first_non_slash);
+  } else {
+    // URL contains a host: this means it's UNC. We keep the preceeding slash
+    // on the path.
+    path = "\\\\";
+    path.append(host);
+    path.append(url.path());
+  }
+
+  if (path.empty())
+    return false;
+  std::replace(path.begin(), path.end(), '/', '\\');
+
+  // GURL stores strings as percent-encoded UTF-8, this will undo if possible.
+  path = UnescapeURLComponent(path,
+      UnescapeRule::SPACES | UnescapeRule::URL_SPECIAL_CHARS);
+
+  if (!IsStringUTF8(path.c_str())) {
+    // Not UTF-8, assume encoding is native codepage and we're done. We know we
+    // are giving the conversion function a nonempty string, and it may fail if
+    // the given string is not in the current encoding and give us an empty
+    // string back. We detect this and report failure.
+    *file_path = base::SysNativeMBToWide(path);
+    return !file_path->empty();
+  }
+  file_path->assign(UTF8ToWide(path));
+
+  // Now we have an unescaped filename, but are still not sure about its
+  // encoding. For example, each character could be part of a UTF-8 string.
+  if (file_path->empty() || !IsString8Bit(*file_path)) {
+    // assume our 16-bit encoding is correct if it won't fit into an 8-bit
+    // string
+    return true;
+  }
+
+  // Convert our narrow string into the native wide path.
+  std::string narrow;
+  if (!WideToLatin1(*file_path, &narrow)) {
+    NOTREACHED() << "Should have filtered out non-8-bit strings above.";
+    return false;
+  }
+  if (IsStringUTF8(narrow.c_str())) {
+    // Our string actually looks like it could be UTF-8, convert to 8-bit
+    // UTF-8 and then to the corresponding wide string.
+    *file_path = UTF8ToWide(narrow);
+  } else {
+    // Our wide string contains only 8-bit characters and it's not UTF-8, so
+    // we assume it's in the native codepage.
+    *file_path = base::SysNativeMBToWide(narrow);
+  }
+
+  // Fail if 8-bit -> wide conversion failed and gave us an empty string back
+  // (we already filtered out empty strings above).
+  return !file_path->empty();
+}
+
+}  // namespace net