xpcom/io/CocoaFileUtils.mm
author Gijs Kruitbosch <gijskruitbosch@gmail.com>
Fri, 28 Oct 2016 17:38:29 +0100
changeset 320016 2caaf35f549ba8b2931ecbbe0d1f07fddf2cdcd9
parent 317635 176c3e7915d1cf685119066783607684876e9312
permissions -rw-r--r--
Bug 1310518 - fix crashes when downloading files without referrer/source URL, r=mstange MozReview-Commit-ID: HnSb0yxlAfs

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:set ts=2 sts=2 sw=2 et cin:
/* 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 "CocoaFileUtils.h"
#include "nsCocoaFeatures.h"
#include "nsCocoaUtils.h"
#include <Cocoa/Cocoa.h>
#include "nsObjCExceptions.h"
#include "nsDebug.h"

// Need to cope with us using old versions of the SDK and needing this on 10.10+
#if !defined(MAC_OS_X_VERSION_10_10) || (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_10)
const CFStringRef kCFURLQuarantinePropertiesKey = CFSTR("NSURLQuarantinePropertiesKey");
#endif

namespace CocoaFileUtils {

nsresult RevealFileInFinder(CFURLRef url)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (NS_WARN_IF(!url))
    return NS_ERROR_INVALID_ARG;

  NSAutoreleasePool* ap = [[NSAutoreleasePool alloc] init];
  BOOL success = [[NSWorkspace sharedWorkspace] selectFile:[(NSURL*)url path] inFileViewerRootedAtPath:@""];
  [ap release];

  return (success ? NS_OK : NS_ERROR_FAILURE);

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

nsresult OpenURL(CFURLRef url)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (NS_WARN_IF(!url))
    return NS_ERROR_INVALID_ARG;

  NSAutoreleasePool* ap = [[NSAutoreleasePool alloc] init];
  BOOL success = [[NSWorkspace sharedWorkspace] openURL:(NSURL*)url];
  [ap release];

  return (success ? NS_OK : NS_ERROR_FAILURE);

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

nsresult GetFileCreatorCode(CFURLRef url, OSType *creatorCode)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (NS_WARN_IF(!url) || NS_WARN_IF(!creatorCode))
    return NS_ERROR_INVALID_ARG;

  nsAutoreleasePool localPool;

  NSString *resolvedPath = [[(NSURL*)url path] stringByResolvingSymlinksInPath];
  if (!resolvedPath) {
    return NS_ERROR_FAILURE;
  }

  NSDictionary* dict = [[NSFileManager defaultManager] attributesOfItemAtPath:resolvedPath error:nil];
  if (!dict) {
    return NS_ERROR_FAILURE;
  }

  NSNumber* creatorNum = (NSNumber*)[dict objectForKey:NSFileHFSCreatorCode];
  if (!creatorNum) {
    return NS_ERROR_FAILURE;
  }

  *creatorCode = [creatorNum unsignedLongValue];
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

nsresult SetFileCreatorCode(CFURLRef url, OSType creatorCode)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (NS_WARN_IF(!url))
    return NS_ERROR_INVALID_ARG;

  NSAutoreleasePool* ap = [[NSAutoreleasePool alloc] init];
  NSDictionary* dict = [NSDictionary dictionaryWithObject:[NSNumber numberWithUnsignedLong:creatorCode] forKey:NSFileHFSCreatorCode];
  BOOL success = [[NSFileManager defaultManager] setAttributes:dict ofItemAtPath:[(NSURL*)url path] error:nil];
  [ap release];
  return (success ? NS_OK : NS_ERROR_FAILURE);

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

nsresult GetFileTypeCode(CFURLRef url, OSType *typeCode)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (NS_WARN_IF(!url) || NS_WARN_IF(!typeCode))
    return NS_ERROR_INVALID_ARG;

  nsAutoreleasePool localPool;

  NSString *resolvedPath = [[(NSURL*)url path] stringByResolvingSymlinksInPath];
  if (!resolvedPath) {
    return NS_ERROR_FAILURE;
  }

  NSDictionary* dict = [[NSFileManager defaultManager] attributesOfItemAtPath:resolvedPath error:nil];
  if (!dict) {
    return NS_ERROR_FAILURE;
  }

  NSNumber* typeNum = (NSNumber*)[dict objectForKey:NSFileHFSTypeCode];
  if (!typeNum) {
    return NS_ERROR_FAILURE;
  }

  *typeCode = [typeNum unsignedLongValue];
  return NS_OK;

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

nsresult SetFileTypeCode(CFURLRef url, OSType typeCode)
{
  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;

  if (NS_WARN_IF(!url))
    return NS_ERROR_INVALID_ARG;

  NSAutoreleasePool* ap = [[NSAutoreleasePool alloc] init];
  NSDictionary* dict = [NSDictionary dictionaryWithObject:[NSNumber numberWithUnsignedLong:typeCode] forKey:NSFileHFSTypeCode];
  BOOL success = [[NSFileManager defaultManager] setAttributes:dict ofItemAtPath:[(NSURL*)url path] error:nil];
  [ap release];
  return (success ? NS_OK : NS_ERROR_FAILURE);

  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}

void AddOriginMetadataToFile(const CFStringRef filePath,
                             const CFURLRef sourceURL,
                             const CFURLRef referrerURL) {
  typedef OSStatus (*MDItemSetAttribute_type)(MDItemRef, CFStringRef, CFTypeRef);
  static MDItemSetAttribute_type mdItemSetAttributeFunc = NULL;

  static bool did_symbol_lookup = false;
  if (!did_symbol_lookup) {
    did_symbol_lookup = true;

    CFBundleRef metadata_bundle = ::CFBundleGetBundleWithIdentifier(CFSTR("com.apple.Metadata"));
    if (!metadata_bundle) {
      return;
    }

    mdItemSetAttributeFunc = (MDItemSetAttribute_type)
        ::CFBundleGetFunctionPointerForName(metadata_bundle, CFSTR("MDItemSetAttribute"));
  }
  if (!mdItemSetAttributeFunc) {
    return;
  }

  MDItemRef mdItem = ::MDItemCreate(NULL, filePath);
  if (!mdItem) {
    return;
  }

  CFMutableArrayRef list = ::CFArrayCreateMutable(kCFAllocatorDefault, 2, NULL);
  if (!list) {
    ::CFRelease(mdItem);
    return;
  }

  // The first item in the list is the source URL of the downloaded file.
  if (sourceURL) {
    ::CFArrayAppendValue(list, ::CFURLGetString(sourceURL));
  }

  // If the referrer is known, store that in the second position.
  if (referrerURL) {
    ::CFArrayAppendValue(list, ::CFURLGetString(referrerURL));
  }

  mdItemSetAttributeFunc(mdItem, kMDItemWhereFroms, list);

  ::CFRelease(list);
  ::CFRelease(mdItem);
}

void AddQuarantineMetadataToFile(const CFStringRef filePath,
                                 const CFURLRef sourceURL,
                                 const CFURLRef referrerURL,
                                 const bool isFromWeb) {
  CFURLRef fileURL = ::CFURLCreateWithFileSystemPath(kCFAllocatorDefault,
                                                     filePath,
                                                     kCFURLPOSIXPathStyle,
                                                     false);

  // The properties key changed in 10.10:
  CFStringRef quarantinePropKey;
  if (nsCocoaFeatures::OnYosemiteOrLater()) {
    quarantinePropKey = kCFURLQuarantinePropertiesKey;
  } else {
    quarantinePropKey = kLSItemQuarantineProperties;
  }
  CFDictionaryRef quarantineProps = NULL;
  Boolean success = ::CFURLCopyResourcePropertyForKey(fileURL,
                                                      quarantinePropKey,
                                                      &quarantineProps,
                                                      NULL);

  // If there aren't any quarantine properties then the user probably
  // set up an exclusion and we don't need to add metadata.
  if (!success || !quarantineProps) {
    ::CFRelease(fileURL);
    return;
  }

  // We don't know what to do if the props aren't a dictionary.
  if (::CFGetTypeID(quarantineProps) != ::CFDictionaryGetTypeID()) {
    ::CFRelease(fileURL);
    ::CFRelease(quarantineProps);
    return;
  }

  // Make a mutable copy of the properties.
  CFMutableDictionaryRef mutQuarantineProps =
    ::CFDictionaryCreateMutableCopy(kCFAllocatorDefault, 0, (CFDictionaryRef)quarantineProps);
  ::CFRelease(quarantineProps);

  // Add metadata that the OS couldn't infer.

  if (!::CFDictionaryGetValue(mutQuarantineProps, kLSQuarantineTypeKey)) {
    CFStringRef type = isFromWeb ? kLSQuarantineTypeWebDownload : kLSQuarantineTypeOtherDownload;
    ::CFDictionarySetValue(mutQuarantineProps, kLSQuarantineTypeKey, type);
  }

  if (!::CFDictionaryGetValue(mutQuarantineProps, kLSQuarantineOriginURLKey) && referrerURL) {
    ::CFDictionarySetValue(mutQuarantineProps, kLSQuarantineOriginURLKey, referrerURL);
  }

  if (!::CFDictionaryGetValue(mutQuarantineProps, kLSQuarantineDataURLKey) && sourceURL) {
    ::CFDictionarySetValue(mutQuarantineProps, kLSQuarantineDataURLKey, sourceURL);
  }

  // Set quarantine properties on file.
  ::CFURLSetResourcePropertyForKey(fileURL,
                                   quarantinePropKey,
                                   mutQuarantineProps,
                                   NULL);

  ::CFRelease(fileURL);
  ::CFRelease(mutQuarantineProps);
}

} // namespace CocoaFileUtils