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gecko-dev/uriloader/exthandler/mac/nsOSHelperAppService.mm

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/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 <sys/types.h>
#include <sys/stat.h>
#include "nsOSHelperAppService.h"
#include "nsObjCExceptions.h"
#include "nsISupports.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsXPIDLString.h"
#include "nsIURL.h"
#include "nsIFile.h"
#include "nsILocalFileMac.h"
#include "nsMimeTypes.h"
#include "nsIStringBundle.h"
#include "nsIPromptService.h"
#include "nsMemory.h"
#include "nsCRT.h"
#include "nsMIMEInfoMac.h"
#include "nsEmbedCID.h"
#import <CoreFoundation/CoreFoundation.h>
#import <ApplicationServices/ApplicationServices.h>
// chrome URL's
#define HELPERAPPLAUNCHER_BUNDLE_URL "chrome://global/locale/helperAppLauncher.properties"
#define BRAND_BUNDLE_URL "chrome://branding/locale/brand.properties"
/* This is an undocumented interface (in the Foundation framework) that has
* been stable since at least 10.2.8 and is still present on SnowLeopard.
* Furthermore WebKit has three public methods (in WebKitSystemInterface.h)
* that are thin wrappers around this interface's last three methods. So
* it's unlikely to change anytime soon. Now that we're no longer using
* Internet Config Services, this is the only way to look up a MIME type
* from an extension, or vice versa.
*/
@class NSURLFileTypeMappingsInternal;
@interface NSURLFileTypeMappings : NSObject
{
NSURLFileTypeMappingsInternal *_internal;
}
+ (NSURLFileTypeMappings*)sharedMappings;
- (NSString*)MIMETypeForExtension:(NSString*)aString;
- (NSString*)preferredExtensionForMIMEType:(NSString*)aString;
- (NSArray*)extensionsForMIMEType:(NSString*)aString;
@end
nsOSHelperAppService::nsOSHelperAppService() : nsExternalHelperAppService()
{
mode_t mask = umask(0777);
umask(mask);
mPermissions = 0666 & ~mask;
}
nsOSHelperAppService::~nsOSHelperAppService()
{}
nsresult nsOSHelperAppService::OSProtocolHandlerExists(const char * aProtocolScheme, bool * aHandlerExists)
{
// CFStringCreateWithBytes() can fail even if we're not out of memory --
// for example if the 'bytes' parameter is something very wierd (like "<22><>~"
// aka "\xFF\xFF~"), or possibly if it can't be interpreted as using what's
// specified in the 'encoding' parameter. See bug 548719.
CFStringRef schemeString = ::CFStringCreateWithBytes(kCFAllocatorDefault,
(const UInt8*)aProtocolScheme,
strlen(aProtocolScheme),
kCFStringEncodingUTF8,
false);
if (schemeString) {
// LSCopyDefaultHandlerForURLScheme() can fail to find the default handler
// for aProtocolScheme when it's never been explicitly set (using
// LSSetDefaultHandlerForURLScheme()). For example, Safari is the default
// handler for the "http" scheme on a newly installed copy of OS X. But
// this (presumably) wasn't done using LSSetDefaultHandlerForURLScheme(),
// so LSCopyDefaultHandlerForURLScheme() will fail to find Safari. To get
// around this we use LSCopyAllHandlersForURLScheme() instead -- which seems
// never to fail.
// http://lists.apple.com/archives/Carbon-dev/2007/May/msg00349.html
// http://www.realsoftware.com/listarchives/realbasic-nug/2008-02/msg00119.html
CFArrayRef handlerArray = ::LSCopyAllHandlersForURLScheme(schemeString);
*aHandlerExists = !!handlerArray;
if (handlerArray)
::CFRelease(handlerArray);
::CFRelease(schemeString);
} else {
*aHandlerExists = false;
}
return NS_OK;
}
NS_IMETHODIMP nsOSHelperAppService::GetApplicationDescription(const nsACString& aScheme, nsAString& _retval)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
nsresult rv = NS_ERROR_NOT_AVAILABLE;
CFStringRef schemeCFString =
::CFStringCreateWithBytes(kCFAllocatorDefault,
(const UInt8 *)PromiseFlatCString(aScheme).get(),
aScheme.Length(),
kCFStringEncodingUTF8,
false);
if (schemeCFString) {
CFStringRef lookupCFString = ::CFStringCreateWithFormat(NULL, NULL, CFSTR("%@:"), schemeCFString);
if (lookupCFString) {
CFURLRef lookupCFURL = ::CFURLCreateWithString(NULL, lookupCFString, NULL);
if (lookupCFURL) {
CFURLRef appCFURL = NULL;
OSStatus theErr = ::LSGetApplicationForURL(lookupCFURL, kLSRolesAll, NULL, &appCFURL);
if (theErr == noErr) {
CFBundleRef handlerBundle = ::CFBundleCreate(NULL, appCFURL);
if (handlerBundle) {
// Get the human-readable name of the default handler bundle
CFStringRef bundleName =
(CFStringRef)::CFBundleGetValueForInfoDictionaryKey(handlerBundle,
kCFBundleNameKey);
if (bundleName) {
nsAutoTArray<UniChar, 255> buffer;
CFIndex bundleNameLength = ::CFStringGetLength(bundleName);
buffer.SetLength(bundleNameLength);
::CFStringGetCharacters(bundleName, CFRangeMake(0, bundleNameLength),
buffer.Elements());
_retval.Assign(buffer.Elements(), bundleNameLength);
rv = NS_OK;
}
::CFRelease(handlerBundle);
}
::CFRelease(appCFURL);
}
::CFRelease(lookupCFURL);
}
::CFRelease(lookupCFString);
}
::CFRelease(schemeCFString);
}
return rv;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
nsresult nsOSHelperAppService::GetFileTokenForPath(const PRUnichar * aPlatformAppPath, nsIFile ** aFile)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
nsresult rv;
nsCOMPtr<nsILocalFileMac> localFile (do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv));
NS_ENSURE_SUCCESS(rv,rv);
CFURLRef pathAsCFURL;
CFStringRef pathAsCFString = ::CFStringCreateWithCharacters(NULL,
aPlatformAppPath,
NS_strlen(aPlatformAppPath));
if (!pathAsCFString)
return NS_ERROR_OUT_OF_MEMORY;
if (::CFStringGetCharacterAtIndex(pathAsCFString, 0) == '/') {
// we have a Posix path
pathAsCFURL = ::CFURLCreateWithFileSystemPath(nullptr, pathAsCFString,
kCFURLPOSIXPathStyle, false);
if (!pathAsCFURL) {
::CFRelease(pathAsCFString);
return NS_ERROR_OUT_OF_MEMORY;
}
}
else {
// if it doesn't start with a / it's not an absolute Posix path
// let's check if it's a HFS path left over from old preferences
// If it starts with a ':' char, it's not an absolute HFS path
// so bail for that, and also if it's empty
if (::CFStringGetLength(pathAsCFString) == 0 ||
::CFStringGetCharacterAtIndex(pathAsCFString, 0) == ':')
{
::CFRelease(pathAsCFString);
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
pathAsCFURL = ::CFURLCreateWithFileSystemPath(nullptr, pathAsCFString,
kCFURLHFSPathStyle, false);
if (!pathAsCFURL) {
::CFRelease(pathAsCFString);
return NS_ERROR_OUT_OF_MEMORY;
}
}
rv = localFile->InitWithCFURL(pathAsCFURL);
::CFRelease(pathAsCFString);
::CFRelease(pathAsCFURL);
if (NS_FAILED(rv))
return rv;
*aFile = localFile;
NS_IF_ADDREF(*aFile);
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
NS_IMETHODIMP nsOSHelperAppService::GetFromTypeAndExtension(const nsACString& aType, const nsACString& aFileExt, nsIMIMEInfo ** aMIMEInfo)
{
return nsExternalHelperAppService::GetFromTypeAndExtension(aType, aFileExt, aMIMEInfo);
}
// Returns the MIME types an application bundle explicitly claims to handle.
// Returns NULL if aAppRef doesn't explicitly claim to handle any MIME types.
// If the return value is non-NULL, the caller is responsible for freeing it.
// This isn't necessarily the same as the MIME types the application bundle
// is registered to handle in the Launch Services database. (For example
// the Preview application is normally registered to handle the application/pdf
// MIME type, even though it doesn't explicitly claim to handle *any* MIME
// types in its Info.plist. This is probably because Preview does explicitly
// claim to handle the com.adobe.pdf UTI, and Launch Services somehow
// translates this into a claim to support the application/pdf MIME type.
// Launch Services doesn't provide any APIs (documented or undocumented) to
// query which MIME types a given application is registered to handle. So any
// app that wants this information (e.g. the Default Apps pref pane) needs to
// iterate through the entire Launch Services database -- a process which can
// take several seconds.)
static CFArrayRef GetMIMETypesHandledByApp(FSRef *aAppRef)
{
CFURLRef appURL = ::CFURLCreateFromFSRef(kCFAllocatorDefault, aAppRef);
if (!appURL) {
return NULL;
}
CFDictionaryRef infoDict = ::CFBundleCopyInfoDictionaryForURL(appURL);
::CFRelease(appURL);
if (!infoDict) {
return NULL;
}
CFTypeRef cfObject = ::CFDictionaryGetValue(infoDict, CFSTR("CFBundleDocumentTypes"));
if (!cfObject || (::CFGetTypeID(cfObject) != ::CFArrayGetTypeID())) {
::CFRelease(infoDict);
return NULL;
}
CFArrayRef docTypes = static_cast<CFArrayRef>(cfObject);
CFIndex docTypesCount = ::CFArrayGetCount(docTypes);
if (docTypesCount == 0) {
::CFRelease(infoDict);
return NULL;
}
CFMutableArrayRef mimeTypes =
::CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
for (CFIndex i = 0; i < docTypesCount; ++i) {
cfObject = ::CFArrayGetValueAtIndex(docTypes, i);
if (!cfObject || (::CFGetTypeID(cfObject) != ::CFDictionaryGetTypeID())) {
continue;
}
CFDictionaryRef typeDict = static_cast<CFDictionaryRef>(cfObject);
// When this key is present (on OS X 10.5 and later), its contents
// take precedence over CFBundleTypeMIMETypes (and CFBundleTypeExtensions
// and CFBundleTypeOSTypes).
cfObject = ::CFDictionaryGetValue(typeDict, CFSTR("LSItemContentTypes"));
if (cfObject && (::CFGetTypeID(cfObject) == ::CFArrayGetTypeID())) {
continue;
}
cfObject = ::CFDictionaryGetValue(typeDict, CFSTR("CFBundleTypeMIMETypes"));
if (!cfObject || (::CFGetTypeID(cfObject) != ::CFArrayGetTypeID())) {
continue;
}
CFArrayRef mimeTypeHolder = static_cast<CFArrayRef>(cfObject);
CFArrayAppendArray(mimeTypes, mimeTypeHolder,
::CFRangeMake(0, ::CFArrayGetCount(mimeTypeHolder)));
}
::CFRelease(infoDict);
if (!::CFArrayGetCount(mimeTypes)) {
::CFRelease(mimeTypes);
mimeTypes = NULL;
}
return mimeTypes;
}
// aMIMEType and aFileExt might not match, If they don't we set *aFound to
// false and return a minimal nsIMIMEInfo structure.
already_AddRefed<nsIMIMEInfo>
nsOSHelperAppService::GetMIMEInfoFromOS(const nsACString& aMIMEType,
const nsACString& aFileExt,
bool * aFound)
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSNULL;
*aFound = false;
const nsCString& flatType = PromiseFlatCString(aMIMEType);
const nsCString& flatExt = PromiseFlatCString(aFileExt);
PR_LOG(mLog, PR_LOG_DEBUG, ("Mac: HelperAppService lookup for type '%s' ext '%s'\n",
flatType.get(), flatExt.get()));
// Create a Mac-specific MIME info so we can use Mac-specific members.
nsMIMEInfoMac* mimeInfoMac = new nsMIMEInfoMac(aMIMEType);
if (!mimeInfoMac)
return nullptr;
NS_ADDREF(mimeInfoMac);
NSAutoreleasePool *localPool = [[NSAutoreleasePool alloc] init];
OSStatus err;
bool haveAppForType = false;
bool haveAppForExt = false;
bool typeAppIsDefault = false;
bool extAppIsDefault = false;
FSRef typeAppFSRef;
FSRef extAppFSRef;
CFStringRef cfMIMEType = NULL;
if (!aMIMEType.IsEmpty()) {
CFURLRef appURL = NULL;
// CFStringCreateWithCString() can fail even if we're not out of memory --
// for example if the 'cStr' parameter is something very wierd (like "<22><>~"
// aka "\xFF\xFF~"), or possibly if it can't be interpreted as using what's
// specified in the 'encoding' parameter. See bug 548719.
cfMIMEType = ::CFStringCreateWithCString(NULL, flatType.get(),
kCFStringEncodingUTF8);
if (cfMIMEType) {
err = ::LSCopyApplicationForMIMEType(cfMIMEType, kLSRolesAll, &appURL);
if ((err == noErr) && appURL && ::CFURLGetFSRef(appURL, &typeAppFSRef)) {
haveAppForType = true;
PR_LOG(mLog, PR_LOG_DEBUG, ("LSCopyApplicationForMIMEType found a default application\n"));
}
if (appURL) {
::CFRelease(appURL);
}
}
}
if (!aFileExt.IsEmpty()) {
// CFStringCreateWithCString() can fail even if we're not out of memory --
// for example if the 'cStr' parameter is something very wierd (like "<22><>~"
// aka "\xFF\xFF~"), or possibly if it can't be interpreted as using what's
// specified in the 'encoding' parameter. See bug 548719.
CFStringRef cfExt = ::CFStringCreateWithCString(NULL, flatExt.get(), kCFStringEncodingUTF8);
if (cfExt) {
err = ::LSGetApplicationForInfo(kLSUnknownType, kLSUnknownCreator, cfExt,
kLSRolesAll, &extAppFSRef, nullptr);
if (err == noErr) {
haveAppForExt = true;
PR_LOG(mLog, PR_LOG_DEBUG, ("LSGetApplicationForInfo found a default application\n"));
}
::CFRelease(cfExt);
}
}
if (haveAppForType && haveAppForExt) {
// Do aMIMEType and aFileExt match?
if (::FSCompareFSRefs((const FSRef *) &typeAppFSRef, (const FSRef *) &extAppFSRef) == noErr) {
typeAppIsDefault = true;
*aFound = true;
}
} else if (haveAppForType) {
// If aFileExt isn't empty, it doesn't match aMIMEType.
if (aFileExt.IsEmpty()) {
typeAppIsDefault = true;
*aFound = true;
}
} else if (haveAppForExt) {
// If aMIMEType isn't empty, it doesn't match aFileExt, which should mean
// that we haven't found a matching app. But make an exception for an app
// that also explicitly claims to handle aMIMEType, or which doesn't claim
// to handle any MIME types. This helps work around the following Apple
// design flaw:
//
// Launch Services is somewhat unreliable about registering Apple apps to
// handle MIME types. Probably this is because Apple has officially
// deprecated support for MIME types (in favor of UTIs). As a result,
// most of Apple's own apps don't explicitly claim to handle any MIME
// types (instead they claim to handle one or more UTIs). So Launch
// Services must contain logic to translate support for a given UTI into
// support for one or more MIME types, and it doesn't always do this
// correctly. For example DiskImageMounter isn't (by default) registered
// to handle the application/x-apple-diskimage MIME type. See bug 675356.
//
// Apple has also deprecated support for file extensions, and Apple apps
// also don't register to handle them. But for some reason Launch Services
// is (apparently) better about translating support for a given UTI into
// support for one or more file extensions. It's not at all clear why.
if (aMIMEType.IsEmpty()) {
extAppIsDefault = true;
*aFound = true;
} else {
CFArrayRef extAppMIMETypes = GetMIMETypesHandledByApp(&extAppFSRef);
if (extAppMIMETypes) {
if (cfMIMEType) {
if (::CFArrayContainsValue(extAppMIMETypes,
::CFRangeMake(0, ::CFArrayGetCount(extAppMIMETypes)),
cfMIMEType)) {
extAppIsDefault = true;
*aFound = true;
}
}
::CFRelease(extAppMIMETypes);
} else {
extAppIsDefault = true;
*aFound = true;
}
}
}
if (cfMIMEType) {
::CFRelease(cfMIMEType);
}
if (aMIMEType.IsEmpty()) {
if (haveAppForExt) {
// If aMIMEType is empty and we've found a default app for aFileExt, try
// to get the MIME type from aFileExt. (It might also be worth doing
// this when aMIMEType isn't empty but haveAppForType is false -- but
// the doc for this method says that if we have a MIME type (in
// aMIMEType), we need to give it preference.)
NSURLFileTypeMappings *map = [NSURLFileTypeMappings sharedMappings];
NSString *extStr = [NSString stringWithCString:flatExt.get() encoding:NSASCIIStringEncoding];
NSString *typeStr = map ? [map MIMETypeForExtension:extStr] : NULL;
if (typeStr) {
nsAutoCString mimeType;
mimeType.Assign((char *)[typeStr cStringUsingEncoding:NSASCIIStringEncoding]);
mimeInfoMac->SetMIMEType(mimeType);
haveAppForType = true;
} else {
// Sometimes the OS won't give us a MIME type for an extension that's
// registered with Launch Services and has a default app: For example
// Real Player registers itself for the "ogg" extension and for the
// audio/x-ogg and application/x-ogg MIME types, but
// MIMETypeForExtension returns nil for the "ogg" extension even on
// systems where Real Player is installed. This is probably an Apple
// bug. But bad things happen if we return an nsIMIMEInfo structure
// with an empty MIME type and set *aFound to true. So in this
// case we need to set it to false here.
haveAppForExt = false;
extAppIsDefault = false;
*aFound = false;
}
} else {
// Otherwise set the MIME type to a reasonable fallback.
mimeInfoMac->SetMIMEType(NS_LITERAL_CSTRING(APPLICATION_OCTET_STREAM));
}
}
if (typeAppIsDefault || extAppIsDefault) {
if (haveAppForExt)
mimeInfoMac->AppendExtension(aFileExt);
nsCOMPtr<nsILocalFileMac> app(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
if (!app) {
NS_RELEASE(mimeInfoMac);
[localPool release];
return nullptr;
}
CFStringRef cfAppName = NULL;
if (typeAppIsDefault) {
app->InitWithFSRef(&typeAppFSRef);
::LSCopyItemAttribute((const FSRef *) &typeAppFSRef, kLSRolesAll,
kLSItemDisplayName, (CFTypeRef *) &cfAppName);
} else {
app->InitWithFSRef(&extAppFSRef);
::LSCopyItemAttribute((const FSRef *) &extAppFSRef, kLSRolesAll,
kLSItemDisplayName, (CFTypeRef *) &cfAppName);
}
if (cfAppName) {
nsAutoTArray<UniChar, 255> buffer;
CFIndex appNameLength = ::CFStringGetLength(cfAppName);
buffer.SetLength(appNameLength);
::CFStringGetCharacters(cfAppName, CFRangeMake(0, appNameLength),
buffer.Elements());
nsAutoString appName;
appName.Assign(buffer.Elements(), appNameLength);
mimeInfoMac->SetDefaultDescription(appName);
::CFRelease(cfAppName);
}
mimeInfoMac->SetDefaultApplication(app);
mimeInfoMac->SetPreferredAction(nsIMIMEInfo::useSystemDefault);
} else {
mimeInfoMac->SetPreferredAction(nsIMIMEInfo::saveToDisk);
}
nsAutoCString mimeType;
mimeInfoMac->GetMIMEType(mimeType);
if (*aFound && !mimeType.IsEmpty()) {
// If we have a MIME type, make sure its preferred extension is included
// in our list.
NSURLFileTypeMappings *map = [NSURLFileTypeMappings sharedMappings];
NSString *typeStr = [NSString stringWithCString:mimeType.get() encoding:NSASCIIStringEncoding];
NSString *extStr = map ? [map preferredExtensionForMIMEType:typeStr] : NULL;
if (extStr) {
nsAutoCString preferredExt;
preferredExt.Assign((char *)[extStr cStringUsingEncoding:NSASCIIStringEncoding]);
mimeInfoMac->AppendExtension(preferredExt);
}
CFStringRef cfType = ::CFStringCreateWithCString(NULL, mimeType.get(), kCFStringEncodingUTF8);
CFStringRef cfTypeDesc = NULL;
if (::LSCopyKindStringForMIMEType(cfType, &cfTypeDesc) == noErr) {
nsAutoTArray<UniChar, 255> buffer;
CFIndex typeDescLength = ::CFStringGetLength(cfTypeDesc);
buffer.SetLength(typeDescLength);
::CFStringGetCharacters(cfTypeDesc, CFRangeMake(0, typeDescLength),
buffer.Elements());
nsAutoString typeDesc;
typeDesc.Assign(buffer.Elements(), typeDescLength);
mimeInfoMac->SetDescription(typeDesc);
}
if (cfTypeDesc) {
::CFRelease(cfTypeDesc);
}
::CFRelease(cfType);
}
PR_LOG(mLog, PR_LOG_DEBUG, ("OS gave us: type '%s' found '%i'\n", mimeType.get(), *aFound));
[localPool release];
return mimeInfoMac;
NS_OBJC_END_TRY_ABORT_BLOCK_NSNULL;
}
NS_IMETHODIMP
nsOSHelperAppService::GetProtocolHandlerInfoFromOS(const nsACString &aScheme,
bool *found,
nsIHandlerInfo **_retval)
{
NS_ASSERTION(!aScheme.IsEmpty(), "No scheme was specified!");
nsresult rv = OSProtocolHandlerExists(nsPromiseFlatCString(aScheme).get(),
found);
if (NS_FAILED(rv))
return rv;
nsMIMEInfoMac *handlerInfo =
new nsMIMEInfoMac(aScheme, nsMIMEInfoBase::eProtocolInfo);
NS_ENSURE_TRUE(handlerInfo, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*_retval = handlerInfo);
if (!*found) {
// Code that calls this requires an object regardless if the OS has
// something for us, so we return the empty object.
return NS_OK;
}
nsAutoString desc;
GetApplicationDescription(aScheme, desc);
handlerInfo->SetDefaultDescription(desc);
return NS_OK;
}
void
nsOSHelperAppService::FixFilePermissions(nsIFile* aFile)
{
aFile->SetPermissions(mPermissions);
}
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