diff options
Diffstat (limited to 'xpcom/io/nsLocalFileCommon.cpp')
| -rw-r--r-- | xpcom/io/nsLocalFileCommon.cpp | 427 |
1 files changed, 427 insertions, 0 deletions
diff --git a/xpcom/io/nsLocalFileCommon.cpp b/xpcom/io/nsLocalFileCommon.cpp new file mode 100644 index 0000000000..08a10c5b4f --- /dev/null +++ b/xpcom/io/nsLocalFileCommon.cpp @@ -0,0 +1,427 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#include "nsLocalFile.h" // includes platform-specific headers + +#include "nsString.h" +#include "nsCOMPtr.h" +#include "nsReadableUtils.h" +#include "nsPrintfCString.h" +#include "nsCRT.h" +#include "nsNativeCharsetUtils.h" +#include "nsUTF8Utils.h" +#include "nsArray.h" +#include "nsLocalFileCommon.h" + +#ifdef XP_WIN +# include <string.h> +#endif + +// Extensions that should be considered 'executable', ie will not allow users +// to open immediately without first saving to disk, and potentially provoke +// other warnings. PLEASE read the longer comment in +// toolkit/components/reputationservice/ApplicationReputation.cpp +// before modifying this list! +/* static */ +const char* const sExecutableExts[] = { + // clang-format off + ".accda", // MS Access database + ".accdb", // MS Access database + ".accde", // MS Access database + ".accdr", // MS Access database + ".ad", + ".ade", // access project extension + ".adp", + ".afploc", // Apple Filing Protocol Location + ".air", // Adobe AIR installer + ".app", // executable application + ".application", // from bug 348763 + ".asp", + ".atloc", // Appletalk Location + ".bas", + ".bat", + ".cer", // Signed certificate file + ".chm", + ".cmd", + ".com", + ".cpl", + ".crt", + ".der", + ".exe", + ".fileloc", // Apple finder internet location data file + ".ftploc", // Apple FTP Location + ".fxp", // FoxPro compiled app + ".hlp", + ".hta", + ".inetloc", // Apple finder internet location data file + ".inf", + ".ins", + ".isp", + ".jar", // java application bundle + ".jnlp", + ".js", + ".jse", + ".lnk", + ".mad", // Access Module Shortcut + ".maf", // Access + ".mag", // Access Diagram Shortcut + ".mam", // Access Macro Shortcut + ".maq", // Access Query Shortcut + ".mar", // Access Report Shortcut + ".mas", // Access Stored Procedure + ".mat", // Access Table Shortcut + ".mau", // Media Attachment Unit + ".mav", // Access View Shortcut + ".maw", // Access Data Access Page + ".mda", // Access Add-in, MDA Access 2 Workgroup + ".mdb", + ".mde", + ".mdt", // Access Add-in Data + ".mdw", // Access Workgroup Information + ".mdz", // Access Wizard Template + ".msc", + ".msh", // Microsoft Shell + ".msh1", // Microsoft Shell + ".msh1xml", // Microsoft Shell + ".msh2", // Microsoft Shell + ".msh2xml", // Microsoft Shell + ".mshxml", // Microsoft Shell + ".msi", + ".msp", + ".mst", + ".ops", // Office Profile Settings + ".pcd", + ".pif", + ".plg", // Developer Studio Build Log + ".prf", // windows system file + ".prg", + ".pst", + ".reg", + ".scf", // Windows explorer command + ".scr", + ".sct", + ".settingcontent-ms", + ".shb", + ".shs", + ".url", + ".vb", + ".vbe", + ".vbs", + ".vdx", + ".vsd", + ".vsdm", + ".vsdx", + ".vsmacros", // Visual Studio .NET Binary-based Macro Project + ".vss", + ".vssm", + ".vssx", + ".vst", + ".vstm", + ".vstx", + ".vsw", + ".vsx", + ".vtx", + ".webloc", // MacOS website location file + ".ws", + ".wsc", + ".wsf", + ".wsh" + // clang-format on +}; + +#if !defined(MOZ_WIDGET_COCOA) && !defined(XP_WIN) +NS_IMETHODIMP +nsLocalFile::InitWithFile(nsIFile* aFile) { + if (NS_WARN_IF(!aFile)) { + return NS_ERROR_INVALID_ARG; + } + + nsAutoCString path; + aFile->GetNativePath(path); + if (path.IsEmpty()) { + return NS_ERROR_INVALID_ARG; + } + return InitWithNativePath(path); +} +#endif + +#define kMaxFilenameLength 255 +#define kMaxExtensionLength 100 +#define kMaxSequenceNumberLength 5 // "-9999" +// requirement: kMaxExtensionLength < +// kMaxFilenameLength - kMaxSequenceNumberLength + +NS_IMETHODIMP +nsLocalFile::CreateUnique(uint32_t aType, uint32_t aAttributes) { + nsresult rv; + bool longName; + +#ifdef XP_WIN + nsAutoString pathName, leafName, rootName, suffix; + rv = GetPath(pathName); +#else + nsAutoCString pathName, leafName, rootName, suffix; + rv = GetNativePath(pathName); +#endif + if (NS_FAILED(rv)) { + return rv; + } + + auto FailedBecauseExists = [&](nsresult aRv) { + if (aRv == NS_ERROR_FILE_ACCESS_DENIED) { + bool exists; + return NS_SUCCEEDED(Exists(&exists)) && exists; + } + return aRv == NS_ERROR_FILE_ALREADY_EXISTS; + }; + + longName = + (pathName.Length() + kMaxSequenceNumberLength > kMaxFilenameLength); + if (!longName) { + rv = Create(aType, aAttributes); + if (!FailedBecauseExists(rv)) { + return rv; + } + } + +#ifdef XP_WIN + rv = GetLeafName(leafName); + if (NS_FAILED(rv)) { + return rv; + } + + const int32_t lastDot = leafName.RFindChar(char16_t('.')); +#else + rv = GetNativeLeafName(leafName); + if (NS_FAILED(rv)) { + return rv; + } + + const int32_t lastDot = leafName.RFindChar('.'); +#endif + + if (lastDot == kNotFound) { + rootName = leafName; + } else { + suffix = Substring(leafName, lastDot); // include '.' + rootName = Substring(leafName, 0, lastDot); // strip suffix and dot + } + + if (longName) { + int32_t maxRootLength = + (kMaxFilenameLength - (pathName.Length() - leafName.Length()) - + suffix.Length() - kMaxSequenceNumberLength); + + // We cannot create an item inside a directory whose name is too long. + // Also, ensure that at least one character remains after we truncate + // the root name, as we don't want to end up with an empty leaf name. + if (maxRootLength < 2) { + return NS_ERROR_FILE_UNRECOGNIZED_PATH; + } + +#ifdef XP_WIN + // ensure that we don't cut the name in mid-UTF16-character + rootName.SetLength(NS_IS_LOW_SURROGATE(rootName[maxRootLength]) + ? maxRootLength - 1 + : maxRootLength); + SetLeafName(rootName + suffix); +#else + if (NS_IsNativeUTF8()) { + // ensure that we don't cut the name in mid-UTF8-character + // (assume the name is valid UTF8 to begin with) + while (UTF8traits::isInSeq(rootName[maxRootLength])) { + --maxRootLength; + } + + // Another check to avoid ending up with an empty leaf name. + if (maxRootLength == 0 && suffix.IsEmpty()) { + return NS_ERROR_FILE_UNRECOGNIZED_PATH; + } + } + + rootName.SetLength(maxRootLength); + SetNativeLeafName(rootName + suffix); +#endif + nsresult rvCreate = Create(aType, aAttributes); + if (!FailedBecauseExists(rvCreate)) { + return rvCreate; + } + } + + for (int indx = 1; indx < 10000; ++indx) { + // start with "Picture-1.jpg" after "Picture.jpg" exists +#ifdef XP_WIN + SetLeafName(rootName + + NS_ConvertASCIItoUTF16(nsPrintfCString("-%d", indx)) + suffix); +#else + SetNativeLeafName(rootName + nsPrintfCString("-%d", indx) + suffix); +#endif + rv = Create(aType, aAttributes); + if (NS_SUCCEEDED(rv) || !FailedBecauseExists(rv)) { + return rv; + } + } + + // The disk is full, sort of + return NS_ERROR_FILE_TOO_BIG; +} + +#if defined(XP_WIN) +static const char16_t kPathSeparatorChar = '\\'; +#elif defined(XP_UNIX) +static const char16_t kPathSeparatorChar = '/'; +#else +# error Need to define file path separator for your platform +#endif + +static void SplitPath(char16_t* aPath, nsTArray<char16_t*>& aNodeArray) { + if (*aPath == 0) { + return; + } + + if (*aPath == kPathSeparatorChar) { + aPath++; + } + aNodeArray.AppendElement(aPath); + + for (char16_t* cp = aPath; *cp != 0; ++cp) { + if (*cp == kPathSeparatorChar) { + *cp++ = 0; + if (*cp == 0) { + break; + } + aNodeArray.AppendElement(cp); + } + } +} + +NS_IMETHODIMP +nsLocalFile::GetRelativeDescriptor(nsIFile* aFromFile, nsACString& aResult) { + if (NS_WARN_IF(!aFromFile)) { + return NS_ERROR_INVALID_ARG; + } + + // + // aResult will be UTF-8 encoded + // + + nsresult rv; + aResult.Truncate(0); + + nsAutoString thisPath, fromPath; + AutoTArray<char16_t*, 32> thisNodes; + AutoTArray<char16_t*, 32> fromNodes; + + rv = GetPath(thisPath); + if (NS_FAILED(rv)) { + return rv; + } + rv = aFromFile->GetPath(fromPath); + if (NS_FAILED(rv)) { + return rv; + } + + // get raw pointer to mutable string buffer + char16_t* thisPathPtr = thisPath.BeginWriting(); + char16_t* fromPathPtr = fromPath.BeginWriting(); + + SplitPath(thisPathPtr, thisNodes); + SplitPath(fromPathPtr, fromNodes); + + size_t nodeIndex; + for (nodeIndex = 0; + nodeIndex < thisNodes.Length() && nodeIndex < fromNodes.Length(); + ++nodeIndex) { +#ifdef XP_WIN + if (_wcsicmp(char16ptr_t(thisNodes[nodeIndex]), + char16ptr_t(fromNodes[nodeIndex]))) { + break; + } +#else + if (nsCRT::strcmp(thisNodes[nodeIndex], fromNodes[nodeIndex])) { + break; + } +#endif + } + + size_t branchIndex = nodeIndex; + for (nodeIndex = branchIndex; nodeIndex < fromNodes.Length(); ++nodeIndex) { + aResult.AppendLiteral("../"); + } + StringJoinAppend(aResult, "/"_ns, mozilla::Span{thisNodes}.From(branchIndex), + [](nsACString& dest, const auto& thisNode) { + // XXX(Bug 1682869) We wouldn't need to reconstruct a + // nsDependentString here if SplitPath already returned + // nsDependentString. In fact, it seems SplitPath might be + // replaced by ParseString? + AppendUTF16toUTF8(nsDependentString{thisNode}, dest); + }); + + return NS_OK; +} + +NS_IMETHODIMP +nsLocalFile::SetRelativeDescriptor(nsIFile* aFromFile, + const nsACString& aRelativeDesc) { + constexpr auto kParentDirStr = "../"_ns; + + nsCOMPtr<nsIFile> targetFile; + nsresult rv = aFromFile->Clone(getter_AddRefs(targetFile)); + if (NS_FAILED(rv)) { + return rv; + } + + // + // aRelativeDesc is UTF-8 encoded + // + + nsCString::const_iterator strBegin, strEnd; + aRelativeDesc.BeginReading(strBegin); + aRelativeDesc.EndReading(strEnd); + + nsCString::const_iterator nodeBegin(strBegin), nodeEnd(strEnd); + nsCString::const_iterator pos(strBegin); + + nsCOMPtr<nsIFile> parentDir; + while (FindInReadable(kParentDirStr, nodeBegin, nodeEnd)) { + rv = targetFile->GetParent(getter_AddRefs(parentDir)); + if (NS_FAILED(rv)) { + return rv; + } + if (!parentDir) { + return NS_ERROR_FILE_UNRECOGNIZED_PATH; + } + targetFile = parentDir; + + nodeBegin = nodeEnd; + pos = nodeEnd; + nodeEnd = strEnd; + } + + nodeBegin = nodeEnd = pos; + while (nodeEnd != strEnd) { + FindCharInReadable('/', nodeEnd, strEnd); + targetFile->Append(NS_ConvertUTF8toUTF16(Substring(nodeBegin, nodeEnd))); + if (nodeEnd != strEnd) { // If there's more left in the string, inc over + // the '/' nodeEnd is on. + ++nodeEnd; + } + nodeBegin = nodeEnd; + } + + return InitWithFile(targetFile); +} + +NS_IMETHODIMP +nsLocalFile::GetRelativePath(nsIFile* aFromFile, nsACString& aResult) { + return GetRelativeDescriptor(aFromFile, aResult); +} + +NS_IMETHODIMP +nsLocalFile::SetRelativePath(nsIFile* aFromFile, + const nsACString& aRelativePath) { + return SetRelativeDescriptor(aFromFile, aRelativePath); +} |