gecko-dev/netwerk/base/nsURLHelperOSX.cpp

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6.8 KiB
C++

/* -*- 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 http://mozilla.org/MPL/2.0/. */
/* 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(Substring((char16_t *)volName.unicode,
(char16_t *)volName.unicode + volName.length));
gVolumeList->AppendElement(volNameStr);
volumeIndex++;
}
} while (err == noErr);
}
// Extract the first component of the path
nsACString::const_iterator start;
path.BeginReading(start);
start.advance(1); // path begins with '/'
nsACString::const_iterator directory_end;
path.EndReading(directory_end);
nsACString::const_iterator component_end(start);
FindCharInReadable('/', component_end, directory_end);
nsAutoCString flatComponent((Substring(start, component_end)));
NS_UnescapeURL(flatComponent);
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;
}
}
CFRelease(pathStrRef);
if (urlRef)
CFRelease(urlRef);
return rv;
}
static void SwapSlashColon(char *s)
{
while (*s) {
if (*s == '/')
*s = ':';
else if (*s == ':')
*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))
escPath.Insert(prefix, 0);
else
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:
// file:///path-name.
// But, we still encounter file URLs that use HFS paths:
// file:///volume-name/path-name
// 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.Insert("/", 0);
if (::FSPathMakeRef((UInt8*)possibleVolName.get(), &testRef, nullptr) != noErr)
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 '/'
SwapSlashColon((char *)path.get());
// 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);
}
NS_UnescapeURL(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;
localFile.forget(result);
return NS_OK;
}