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Diffstat (limited to 'uriloader/exthandler/mac/nsOSHelperAppService.mm')
| -rw-r--r-- | uriloader/exthandler/mac/nsOSHelperAppService.mm | 613 |
1 files changed, 613 insertions, 0 deletions
diff --git a/uriloader/exthandler/mac/nsOSHelperAppService.mm b/uriloader/exthandler/mac/nsOSHelperAppService.mm new file mode 100644 index 0000000000..602c2a89d5 --- /dev/null +++ b/uriloader/exthandler/mac/nsOSHelperAppService.mm @@ -0,0 +1,613 @@ +/* -*- 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 "mozilla/net/NeckoCommon.h" +#include "mozilla/StaticPrefs_browser.h" +#include "nsComponentManagerUtils.h" +#include "nsOSHelperAppService.h" +#include "nsObjCExceptions.h" +#include "nsISupports.h" +#include "nsString.h" +#include "nsTArray.h" +#include "nsIFile.h" +#include "nsILocalFileMac.h" +#include "nsMimeTypes.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" + +nsresult GetDefaultBundleURL(const nsACString& aScheme, CFURLRef* aBundleURL) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN; + + 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) { + *aBundleURL = + ::LSCopyDefaultApplicationURLForURL(lookupCFURL, kLSRolesAll, NULL); + if (*aBundleURL) { + rv = NS_OK; + } + + ::CFRelease(lookupCFURL); + } + + ::CFRelease(lookupCFString); + } + + ::CFRelease(schemeCFString); + } + + return rv; + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE); +} + +using mozilla::LogLevel; + +/* 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() {} + +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 weird (like + // "\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_BLOCK_RETURN; + + nsresult rv = NS_ERROR_NOT_AVAILABLE; + + CFURLRef handlerBundleURL; + rv = GetDefaultBundleURL(aScheme, &handlerBundleURL); + + if (NS_SUCCEEDED(rv) && handlerBundleURL) { + CFBundleRef handlerBundle = CFBundleCreate(NULL, handlerBundleURL); + if (!handlerBundle) { + ::CFRelease(handlerBundleURL); + return NS_ERROR_OUT_OF_MEMORY; + } + + // Get the human-readable name of the bundle + CFStringRef bundleName = + (CFStringRef)::CFBundleGetValueForInfoDictionaryKey(handlerBundle, + kCFBundleNameKey); + + if (bundleName) { + AutoTArray<UniChar, 255> buffer; + CFIndex bundleNameLength = ::CFStringGetLength(bundleName); + buffer.SetLength(bundleNameLength); + ::CFStringGetCharacters(bundleName, CFRangeMake(0, bundleNameLength), + buffer.Elements()); + _retval.Assign(reinterpret_cast<char16_t*>(buffer.Elements()), + bundleNameLength); + rv = NS_OK; + } + ::CFRelease(handlerBundle); + ::CFRelease(handlerBundleURL); + } + + return rv; + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE); +} + +NS_IMETHODIMP nsOSHelperAppService::IsCurrentAppOSDefaultForProtocol( + const nsACString& aScheme, bool* _retval) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN; + + nsresult rv = NS_ERROR_NOT_AVAILABLE; + + CFURLRef handlerBundleURL; + rv = GetDefaultBundleURL(aScheme, &handlerBundleURL); + if (NS_SUCCEEDED(rv) && handlerBundleURL) { + // Ensure we don't accidentally return success if we can't get an app + // bundle. + rv = NS_ERROR_NOT_AVAILABLE; + CFBundleRef appBundle = ::CFBundleGetMainBundle(); + if (appBundle) { + CFURLRef selfURL = ::CFBundleCopyBundleURL(appBundle); + *_retval = ::CFEqual(selfURL, handlerBundleURL); + rv = NS_OK; + ::CFRelease(selfURL); + } + ::CFRelease(handlerBundleURL); + } + + return rv; + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE); +} + +nsresult nsOSHelperAppService::GetFileTokenForPath( + const char16_t* aPlatformAppPath, nsIFile** aFile) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN; + + nsresult rv; + nsCOMPtr<nsILocalFileMac> localFile( + do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv)); + NS_ENSURE_SUCCESS(rv, rv); + + CFURLRef pathAsCFURL; + CFStringRef pathAsCFString = ::CFStringCreateWithCharacters( + NULL, reinterpret_cast<const UniChar*>(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_BLOCK_RETURN(NS_ERROR_FAILURE); +} + +// 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; +} + +nsresult nsOSHelperAppService::GetMIMEInfoFromOS(const nsACString& aMIMEType, + const nsACString& aFileExt, + bool* aFound, + nsIMIMEInfo** aMIMEInfo) { + NS_OBJC_BEGIN_TRY_BLOCK_RETURN; + MOZ_ASSERT(XRE_IsParentProcess()); + + *aFound = false; + + const nsCString& flatType = PromiseFlatCString(aMIMEType); + const nsCString& flatExt = PromiseFlatCString(aFileExt); + + MOZ_LOG(sLog, LogLevel::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. + RefPtr<nsMIMEInfoMac> mimeInfoMac = new nsMIMEInfoMac(aMIMEType); + + NSAutoreleasePool* localPool = [[NSAutoreleasePool alloc] init]; + + OSStatus err; + bool haveAppForType = false; + bool haveAppForExt = false; + bool typeIsOctetStream = false; + bool typeAppIsDefault = false; + bool extAppIsDefault = false; + FSRef typeAppFSRef; + FSRef extAppFSRef; + + CFStringRef cfMIMEType = NULL; + + if (!aMIMEType.IsEmpty()) { + typeIsOctetStream = + aMIMEType.LowerCaseEqualsLiteral(APPLICATION_OCTET_STREAM); + CFURLRef appURL = NULL; + // CFStringCreateWithCString() can fail even if we're not out of memory -- + // for example if the 'cStr' parameter is something very weird (like + // "\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; + MOZ_LOG(sLog, LogLevel::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 weird (like + // "\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; + MOZ_LOG(sLog, LogLevel::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; + } + } + + // If we have an app for the extension, and either don't have one for the + // type, or the type is application/octet-stream (ie "binary blob"), rely + // on the file extension. + if ((!haveAppForType || (!*aFound && typeIsOctetStream)) && 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() || typeIsOctetStream) { + 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(nsLiteralCString(APPLICATION_OCTET_STREAM)); + } + } + + if (typeAppIsDefault || extAppIsDefault) { + if (haveAppForExt) mimeInfoMac->AppendExtension(aFileExt); + + nsresult rv; + nsCOMPtr<nsILocalFileMac> app( + do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv)); + if (NS_FAILED(rv)) { + [localPool release]; + return rv; + } + + 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) { + AutoTArray<UniChar, 255> buffer; + CFIndex appNameLength = ::CFStringGetLength(cfAppName); + buffer.SetLength(appNameLength); + ::CFStringGetCharacters(cfAppName, CFRangeMake(0, appNameLength), + buffer.Elements()); + nsAutoString appName; + appName.Assign(reinterpret_cast<char16_t*>(buffer.Elements()), + appNameLength); + mimeInfoMac->SetDefaultDescription(appName); + ::CFRelease(cfAppName); + } + + mimeInfoMac->SetDefaultApplication(app); + mimeInfoMac->SetPreferredAction(nsIMIMEInfo::saveToDisk); + + } else { + mimeInfoMac->SetPreferredAction(nsIMIMEInfo::saveToDisk); + } + + nsAutoCString mimeType; + mimeInfoMac->GetMIMEType(mimeType); + if (*aFound && !mimeType.IsEmpty()) { + // If we have a MIME type, make sure its extension list is included in our + // list. + NSURLFileTypeMappings* map = [NSURLFileTypeMappings sharedMappings]; + NSString* typeStr = [NSString stringWithCString:mimeType.get() + encoding:NSASCIIStringEncoding]; + NSArray* extensionsList = map ? [map extensionsForMIMEType:typeStr] : NULL; + if (extensionsList) { + for (NSString* extension in extensionsList) { + nsAutoCString ext; + ext.Assign( + (char*)[extension cStringUsingEncoding:NSASCIIStringEncoding]); + mimeInfoMac->AppendExtension(ext); + } + } + + if (CFStringRef cfType = ::CFStringCreateWithCString( + NULL, mimeType.get(), kCFStringEncodingUTF8)) { + if (CFStringRef cfTypeDesc = ::UTTypeCopyDescription(cfType)) { + AutoTArray<UniChar, 255> buffer; + CFIndex typeDescLength = ::CFStringGetLength(cfTypeDesc); + buffer.SetLength(typeDescLength); + ::CFStringGetCharacters(cfTypeDesc, CFRangeMake(0, typeDescLength), + buffer.Elements()); + nsAutoString typeDesc; + typeDesc.Assign(reinterpret_cast<char16_t*>(buffer.Elements()), + typeDescLength); + mimeInfoMac->SetDescription(typeDesc); + ::CFRelease(cfTypeDesc); + } + ::CFRelease(cfType); + } + } + + MOZ_LOG(sLog, LogLevel::Debug, + ("OS gave us: type '%s' found '%i'\n", mimeType.get(), *aFound)); + + [localPool release]; + mimeInfoMac.forget(aMIMEInfo); + return NS_OK; + + NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE); +} + +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; + } + + // As a workaround for the OS X problem described in bug 1391186, don't + // attempt to get/set the application description from the child process. + if (!mozilla::net::IsNeckoChild()) { + nsAutoString desc; + rv = GetApplicationDescription(aScheme, desc); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "GetApplicationDescription failed"); + handlerInfo->SetDefaultDescription(desc); + } + + return NS_OK; +} |