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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
/* Mac OS X-specific local file uri parsing */
#include "nsURLHelper.h"
#include "nsEscape.h"
#include "nsIFile.h"
#include "nsTArray.h"
#include "nsReadableUtils.h"
#include <Carbon/Carbon.h>
static nsTArray<nsCString>* gVolumeList = nullptr;
static bool pathBeginsWithVolName(const nsACString& path,
nsACString& firstPathComponent) {
// Return whether the 1st path component in path (escaped) is equal to the
// name of a mounted volume. Return the 1st path component (unescaped) in any
// case. This needs to be done as quickly as possible, so we cache a list of
// volume names.
// XXX Register an event handler to detect drives being mounted/unmounted?
if (!gVolumeList) {
gVolumeList = new nsTArray<nsCString>;
if (!gVolumeList) {
return false; // out of memory
// Cache a list of volume names
if (!gVolumeList->Length()) {
OSErr err;
ItemCount volumeIndex = 1;
do {
HFSUniStr255 volName;
FSRef rootDirectory;
err = ::FSGetVolumeInfo(0, volumeIndex, nullptr, kFSVolInfoNone, nullptr,
&volName, &rootDirectory);
if (err == noErr) {
NS_ConvertUTF16toUTF8 volNameStr(
(char16_t*)volName.unicode + volName.length));
} while (err == noErr);
// Extract the first component of the path
nsACString::const_iterator start;
start.advance(1); // path begins with '/'
nsACString::const_iterator directory_end;
nsACString::const_iterator component_end(start);
FindCharInReadable('/', component_end, directory_end);
nsAutoCString flatComponent((Substring(start, component_end)));
int32_t foundIndex = gVolumeList->IndexOf(flatComponent);
firstPathComponent = flatComponent;
return (foundIndex != -1);
void net_ShutdownURLHelperOSX() {
delete gVolumeList;
gVolumeList = nullptr;
static nsresult convertHFSPathtoPOSIX(const nsACString& hfsPath,
nsACString& posixPath) {
// Use CFURL to do the conversion. We don't want to do this by simply
// using SwapSlashColon - we need the charset mapped from MacRoman
// to UTF-8, and we need "/Volumes" (or whatever - Apple says this is subject
// to change) prepended if the path is not on the boot drive.
CFStringRef pathStrRef = CFStringCreateWithCString(
nullptr, PromiseFlatCString(hfsPath).get(), kCFStringEncodingMacRoman);
if (!pathStrRef) return NS_ERROR_FAILURE;
nsresult rv = NS_ERROR_FAILURE;
CFURLRef urlRef = CFURLCreateWithFileSystemPath(nullptr, pathStrRef,
kCFURLHFSPathStyle, true);
if (urlRef) {
UInt8 pathBuf[PATH_MAX];
if (CFURLGetFileSystemRepresentation(urlRef, true, pathBuf,
sizeof(pathBuf))) {
posixPath = (char*)pathBuf;
rv = NS_OK;
if (urlRef) CFRelease(urlRef);
return rv;
static void SwapSlashColon(char* s) {
while (*s) {
if (*s == '/')
*s = ':';
else if (*s == ':')
*s = '/';
nsresult net_GetURLSpecFromActualFile(nsIFile* aFile, nsACString& result) {
// NOTE: This is identical to the implementation in nsURLHelperUnix.cpp
nsresult rv;
nsAutoCString ePath;
// construct URL spec from native file path
rv = aFile->GetNativePath(ePath);
if (NS_FAILED(rv)) return rv;
nsAutoCString escPath;
NS_NAMED_LITERAL_CSTRING(prefix, "file://");
// Escape the path with the directory mask
if (NS_EscapeURL(ePath.get(), ePath.Length(), esc_Directory + esc_Forced,
escPath.Insert(prefix, 0);
escPath.Assign(prefix + ePath);
// esc_Directory does not escape the semicolons, so if a filename
// contains semicolons we need to manually escape them.
// This replacement should be removed in bug #473280
escPath.ReplaceSubstring(";", "%3b");
result = escPath;
return NS_OK;
nsresult net_GetFileFromURLSpec(const nsACString& aURL, nsIFile** result) {
// NOTE: See also the implementation in nsURLHelperUnix.cpp
// This matches it except for the HFS path handling.
nsresult rv;
nsCOMPtr<nsIFile> localFile;
rv = NS_NewNativeLocalFile(EmptyCString(), true, getter_AddRefs(localFile));
if (NS_FAILED(rv)) return rv;
nsAutoCString directory, fileBaseName, fileExtension, path;
bool bHFSPath = false;
rv = net_ParseFileURL(aURL, directory, fileBaseName, fileExtension);
if (NS_FAILED(rv)) return rv;
if (!directory.IsEmpty()) {
NS_EscapeURL(directory, esc_Directory | esc_AlwaysCopy, path);
// The canonical form of file URLs on OSX use POSIX paths:
// But, we still encounter file URLs that use HFS paths:
// Determine that here and normalize HFS paths to POSIX.
nsAutoCString possibleVolName;
if (pathBeginsWithVolName(directory, possibleVolName)) {
// Though we know it begins with a volume name, it could still
// be a valid POSIX path if the boot drive is named "Mac HD"
// and there is a directory "Mac HD" at its root. If such a
// directory doesn't exist, we'll assume this is an HFS path.
FSRef testRef;
possibleVolName.InsertLiteral("/", 0);
if (::FSPathMakeRef((UInt8*)possibleVolName.get(), &testRef, nullptr) !=
bHFSPath = true;
if (bHFSPath) {
// "%2F"s need to become slashes, while all other slashes need to
// become colons. If we start out by changing "%2F"s to colons, we
// can reply on SwapSlashColon() to do what we need
path.ReplaceSubstring("%2F", ":");
path.Cut(0, 1); // directory begins with '/'
// At this point, path is an HFS path made using the same
// algorithm as nsURLHelperMac. We'll convert to POSIX below.
if (!fileBaseName.IsEmpty())
NS_EscapeURL(fileBaseName, esc_FileBaseName | esc_AlwaysCopy, path);
if (!fileExtension.IsEmpty()) {
path += '.';
NS_EscapeURL(fileExtension, esc_FileExtension | esc_AlwaysCopy, path);
if (path.Length() != strlen(path.get())) return NS_ERROR_FILE_INVALID_PATH;
if (bHFSPath) convertHFSPathtoPOSIX(path, path);
// assuming path is encoded in the native charset
rv = localFile->InitWithNativePath(path);
if (NS_FAILED(rv)) return rv;
return NS_OK;