228 lines
7.3 KiB
C++
228 lines
7.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Mac OS X-specific local file uri parsing */
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#include "nsURLHelper.h"
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#include "nsEscape.h"
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#include "nsIFile.h"
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#include "nsTArray.h"
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#include "nsReadableUtils.h"
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#include <Carbon/Carbon.h>
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static nsTArray<nsCString> *gVolumeList = nullptr;
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static bool pathBeginsWithVolName(const nsACString& path, nsACString& firstPathComponent)
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{
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// Return whether the 1st path component in path (escaped) is equal to the name
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// of a mounted volume. Return the 1st path component (unescaped) in any case.
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// This needs to be done as quickly as possible, so we cache a list of volume names.
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// XXX Register an event handler to detect drives being mounted/unmounted?
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if (!gVolumeList) {
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gVolumeList = new nsTArray<nsCString>;
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if (!gVolumeList) {
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return false; // out of memory
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}
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}
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// Cache a list of volume names
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if (!gVolumeList->Length()) {
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OSErr err;
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ItemCount volumeIndex = 1;
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do {
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HFSUniStr255 volName;
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FSRef rootDirectory;
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err = ::FSGetVolumeInfo(0, volumeIndex, nullptr, kFSVolInfoNone, nullptr,
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&volName, &rootDirectory);
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if (err == noErr) {
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NS_ConvertUTF16toUTF8 volNameStr(Substring((char16_t *)volName.unicode,
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(char16_t *)volName.unicode + volName.length));
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gVolumeList->AppendElement(volNameStr);
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volumeIndex++;
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}
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} while (err == noErr);
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}
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// Extract the first component of the path
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nsACString::const_iterator start;
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path.BeginReading(start);
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start.advance(1); // path begins with '/'
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nsACString::const_iterator directory_end;
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path.EndReading(directory_end);
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nsACString::const_iterator component_end(start);
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FindCharInReadable('/', component_end, directory_end);
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nsAutoCString flatComponent((Substring(start, component_end)));
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NS_UnescapeURL(flatComponent);
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int32_t foundIndex = gVolumeList->IndexOf(flatComponent);
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firstPathComponent = flatComponent;
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return (foundIndex != -1);
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}
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void
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net_ShutdownURLHelperOSX()
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{
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delete gVolumeList;
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gVolumeList = nullptr;
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}
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static nsresult convertHFSPathtoPOSIX(const nsACString& hfsPath, nsACString& posixPath)
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{
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// Use CFURL to do the conversion. We don't want to do this by simply
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// using SwapSlashColon - we need the charset mapped from MacRoman
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// to UTF-8, and we need "/Volumes" (or whatever - Apple says this is subject to change)
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// prepended if the path is not on the boot drive.
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CFStringRef pathStrRef = CFStringCreateWithCString(nullptr,
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PromiseFlatCString(hfsPath).get(),
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kCFStringEncodingMacRoman);
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if (!pathStrRef)
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return NS_ERROR_FAILURE;
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nsresult rv = NS_ERROR_FAILURE;
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CFURLRef urlRef = CFURLCreateWithFileSystemPath(nullptr,
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pathStrRef, kCFURLHFSPathStyle, true);
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if (urlRef) {
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UInt8 pathBuf[PATH_MAX];
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if (CFURLGetFileSystemRepresentation(urlRef, true, pathBuf, sizeof(pathBuf))) {
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posixPath = (char *)pathBuf;
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rv = NS_OK;
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}
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}
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CFRelease(pathStrRef);
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if (urlRef)
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CFRelease(urlRef);
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return rv;
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}
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static void SwapSlashColon(char *s)
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{
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while (*s) {
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if (*s == '/')
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*s = ':';
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else if (*s == ':')
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*s = '/';
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s++;
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}
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}
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nsresult
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net_GetURLSpecFromActualFile(nsIFile *aFile, nsACString &result)
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{
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// NOTE: This is identical to the implementation in nsURLHelperUnix.cpp
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nsresult rv;
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nsAutoCString ePath;
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// construct URL spec from native file path
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rv = aFile->GetNativePath(ePath);
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if (NS_FAILED(rv))
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return rv;
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nsAutoCString escPath;
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NS_NAMED_LITERAL_CSTRING(prefix, "file://");
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// Escape the path with the directory mask
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if (NS_EscapeURL(ePath.get(), ePath.Length(), esc_Directory+esc_Forced, escPath))
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escPath.Insert(prefix, 0);
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else
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escPath.Assign(prefix + ePath);
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// esc_Directory does not escape the semicolons, so if a filename
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// contains semicolons we need to manually escape them.
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// This replacement should be removed in bug #473280
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escPath.ReplaceSubstring(";", "%3b");
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result = escPath;
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return NS_OK;
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}
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nsresult
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net_GetFileFromURLSpec(const nsACString &aURL, nsIFile **result)
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{
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// NOTE: See also the implementation in nsURLHelperUnix.cpp
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// This matches it except for the HFS path handling.
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nsresult rv;
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nsCOMPtr<nsIFile> localFile;
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rv = NS_NewNativeLocalFile(EmptyCString(), true, getter_AddRefs(localFile));
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if (NS_FAILED(rv))
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return rv;
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nsAutoCString directory, fileBaseName, fileExtension, path;
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bool bHFSPath = false;
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rv = net_ParseFileURL(aURL, directory, fileBaseName, fileExtension);
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if (NS_FAILED(rv))
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return rv;
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if (!directory.IsEmpty()) {
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NS_EscapeURL(directory, esc_Directory|esc_AlwaysCopy, path);
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// The canonical form of file URLs on OSX use POSIX paths:
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// file:///path-name.
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// But, we still encounter file URLs that use HFS paths:
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// file:///volume-name/path-name
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// Determine that here and normalize HFS paths to POSIX.
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nsAutoCString possibleVolName;
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if (pathBeginsWithVolName(directory, possibleVolName)) {
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// Though we know it begins with a volume name, it could still
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// be a valid POSIX path if the boot drive is named "Mac HD"
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// and there is a directory "Mac HD" at its root. If such a
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// directory doesn't exist, we'll assume this is an HFS path.
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FSRef testRef;
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possibleVolName.Insert("/", 0);
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if (::FSPathMakeRef((UInt8*)possibleVolName.get(), &testRef, nullptr) != noErr)
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bHFSPath = true;
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}
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if (bHFSPath) {
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// "%2F"s need to become slashes, while all other slashes need to
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// become colons. If we start out by changing "%2F"s to colons, we
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// can reply on SwapSlashColon() to do what we need
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path.ReplaceSubstring("%2F", ":");
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path.Cut(0, 1); // directory begins with '/'
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SwapSlashColon((char *)path.get());
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// At this point, path is an HFS path made using the same
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// algorithm as nsURLHelperMac. We'll convert to POSIX below.
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}
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}
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if (!fileBaseName.IsEmpty())
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NS_EscapeURL(fileBaseName, esc_FileBaseName|esc_AlwaysCopy, path);
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if (!fileExtension.IsEmpty()) {
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path += '.';
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NS_EscapeURL(fileExtension, esc_FileExtension|esc_AlwaysCopy, path);
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}
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NS_UnescapeURL(path);
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if (path.Length() != strlen(path.get()))
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return NS_ERROR_FILE_INVALID_PATH;
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if (bHFSPath)
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convertHFSPathtoPOSIX(path, path);
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// TenFourFox issue 512 (our own fix for M1412081). Just disallow anything
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// where path starts with /net/ since it looks like ../ paths have already
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// been parsed. Not needed for Tiger, but doesn't hurt.
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nsAutoCString lcPath;
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lcPath.Append(path);
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ToLowerCase(lcPath);
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if (StringBeginsWith(lcPath, NS_LITERAL_CSTRING("/net/"))) {
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fprintf(stderr, "Warning: TenFourFox blocking file:// access to potentially dangerous path %s.\n", path.get());
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return NS_ERROR_FILE_INVALID_PATH;
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}
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// assuming path is encoded in the native charset
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rv = localFile->InitWithNativePath(path);
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if (NS_FAILED(rv))
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return rv;
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localFile.forget(result);
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return NS_OK;
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}
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