зеркало из https://github.com/mozilla/gecko-dev.git
487 строки
18 KiB
C++
487 строки
18 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla browser.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications, Inc.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Scott MacGregor <mscott@netscape.com>
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* Christian Biesinger <cbiesinger@web.de>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsExternalHelperAppService_h__
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#define nsExternalHelperAppService_h__
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#ifdef MOZ_LOGGING
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#define FORCE_PR_LOG
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#endif
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#include "prlog.h"
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#include "prtime.h"
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#include "nsInt64.h"
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#include "nsIExternalHelperAppService.h"
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#include "nsIExternalProtocolService.h"
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#include "nsIWebProgressListener2.h"
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#include "nsIHelperAppLauncherDialog.h"
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#include "nsIMIMEInfo.h"
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#include "nsMIMEInfoImpl.h"
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#include "nsIMIMEService.h"
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#include "nsIStreamListener.h"
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#include "nsIFile.h"
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#include "nsIFileStreams.h"
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#include "nsIOutputStream.h"
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#include "nsString.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsILocalFile.h"
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#include "nsIChannel.h"
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#include "nsIRDFDataSource.h"
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#include "nsIRDFResource.h"
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#include "nsCOMPtr.h"
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#include "nsIObserver.h"
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#include "nsCOMArray.h"
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#include "nsWeakReference.h"
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#include "nsIPrompt.h"
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#include "nsEventQueueUtils.h"
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class nsExternalAppHandler;
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class nsIMIMEInfo;
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class nsIRDFService;
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class nsITransfer;
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/**
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* The helper app service. Responsible for handling content that Mozilla
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* itself can not handle
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*/
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class nsExternalHelperAppService
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: public nsIExternalHelperAppService,
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public nsPIExternalAppLauncher,
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public nsIExternalProtocolService,
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public nsIMIMEService,
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public nsIObserver,
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public nsSupportsWeakReference
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIEXTERNALHELPERAPPSERVICE
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NS_DECL_NSPIEXTERNALAPPLAUNCHER
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NS_DECL_NSIEXTERNALPROTOCOLSERVICE
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NS_DECL_NSIMIMESERVICE
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NS_DECL_NSIOBSERVER
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nsExternalHelperAppService();
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virtual ~nsExternalHelperAppService();
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/**
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* Initializes the RDF datasource from the profile.
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* @retval NS_OK Loading was successful
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* @retval errorcode Loading failed
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* @see mOverRideDataSource
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*/
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NS_HIDDEN_(nsresult) InitDataSource();
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/**
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* Initializes internal state. Will be called automatically when
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* this service is first instantiated.
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*/
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NS_HIDDEN_(nsresult) Init();
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/**
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* Given a content type, look up the user override information to see if
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* we have a mime info object representing this content type. The user
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* over ride information is contained in a in memory data source.
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* @param aMIMEInfo The mime info to fill with the information
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*/
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NS_HIDDEN_(nsresult) GetMIMEInfoForMimeTypeFromDS(const nsACString& aContentType,
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nsIMIMEInfo * aMIMEInfo);
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/**
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* Given an extension, look up the user override information to see if we
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* have a mime info object representing this extension. The user over ride
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* information is contained in an in-memory data source.
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*
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* Does not change the MIME Type of the MIME Info.
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*
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* @param aMIMEInfo The mime info to fill with the information
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*/
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NS_HIDDEN_(nsresult) GetMIMEInfoForExtensionFromDS(const nsACString& aFileExtension,
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nsIMIMEInfo * aMIMEInfo);
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/**
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* Looks up the MIME Type for a given extension in the RDF Datasource.
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* @param aExtension The extension to look for
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* @param aType [out] The type, if found
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* @return PR_TRUE if found, PR_FALSE otherwise
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*/
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NS_HIDDEN_(PRBool) GetTypeFromDS(const nsACString& aFileExtension,
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nsACString& aType);
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/**
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* Given a mimetype and an extension, looks up a mime info from the OS.
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* The mime type is given preference. This function follows the same rules
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* as nsIMIMEService::GetFromTypeAndExtension.
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* This is supposed to be overridden by the platform-specific
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* nsOSHelperAppService!
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* @param aFileExt The file extension; may be empty. UTF-8 encoded.
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* @param [out] aFound
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* Should be set to PR_TRUE if the os has a mapping, to
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* PR_FALSE otherwise. Must not be null.
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* @return A MIMEInfo. This function must return a MIMEInfo object if it
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* can allocate one. The only justifiable reason for not
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* returning one is an out-of-memory error.
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* If null, the value of aFound is unspecified.
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*/
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virtual already_AddRefed<nsIMIMEInfo> GetMIMEInfoFromOS(const nsACString& aMIMEType,
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const nsACString& aFileExt,
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PRBool * aFound) = 0;
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/**
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* Given a string identifying an application, create an nsIFile representing
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* it. This function should look in $PATH for the application.
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* The base class implementation will first try to interpret platformAppPath
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* as an absolute path, and if that fails it will look for a file next to the
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* mozilla executable. Subclasses can override this method if they want a
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* different behaviour.
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* @param platformAppPath A platform specific path to an application that we
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* got out of the rdf data source. This can be a mac
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* file spec, a unix path or a windows path depending
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* on the platform
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* @param aFile [out] An nsIFile representation of that platform
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* application path.
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*/
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virtual nsresult GetFileTokenForPath(const PRUnichar * platformAppPath,
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nsIFile ** aFile);
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/**
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* Helper routine used to test whether a given mime type is in our
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* mimeTypes.rdf data source
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*/
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NS_HIDDEN_(PRBool) MIMETypeIsInDataSource(const char * aContentType);
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protected:
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/**
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* Pointer to the datasource that contains the user override information.
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* @see InitDataSource
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*/
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nsCOMPtr<nsIRDFDataSource> mOverRideDataSource;
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nsCOMPtr<nsIRDFResource> kNC_Description;
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nsCOMPtr<nsIRDFResource> kNC_Value;
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nsCOMPtr<nsIRDFResource> kNC_FileExtensions;
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nsCOMPtr<nsIRDFResource> kNC_Path;
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nsCOMPtr<nsIRDFResource> kNC_UseSystemDefault;
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nsCOMPtr<nsIRDFResource> kNC_SaveToDisk;
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nsCOMPtr<nsIRDFResource> kNC_AlwaysAsk;
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nsCOMPtr<nsIRDFResource> kNC_HandleInternal;
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nsCOMPtr<nsIRDFResource> kNC_PrettyName;
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/**
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* Whether mOverRideDataSource is initialized
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*/
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PRBool mDataSourceInitialized;
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/**
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* Helper routines for digesting the data source and filling in a mime info
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* object for a given content type inside that data source.
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* The content type of the MIME Info will not be changed.
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*/
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NS_HIDDEN_(nsresult) FillTopLevelProperties(nsIRDFResource * aContentTypeNodeResource,
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nsIRDFService * aRDFService,
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nsIMIMEInfo * aMIMEInfo);
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/**
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* @see FillTopLevelProperties
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*/
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NS_HIDDEN_(nsresult) FillContentHandlerProperties(const char * aContentType,
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nsIRDFResource * aContentTypeNodeResource,
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nsIRDFService * aRDFService,
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nsIMIMEInfo * aMIMEInfo);
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/**
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* A small helper function which gets the target for a given source and
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* property. QIs to a literal and returns a CONST ptr to the string value
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* of that target
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*/
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NS_HIDDEN_(nsresult) FillLiteralValueFromTarget(nsIRDFResource * aSource,
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nsIRDFResource * aProperty,
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const PRUnichar ** aLiteralValue);
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/**
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* Searches the "extra" array of MIMEInfo objects for an object
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* with a specific type. If found, it will modify the passed-in
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* MIMEInfo. Otherwise, it will return an error and the MIMEInfo
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* will be untouched.
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* @param aContentType The type to search for.
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* @param aMIMEInfo [inout] The mime info, if found
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*/
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NS_HIDDEN_(nsresult) GetMIMEInfoForMimeTypeFromExtras(const nsACString& aContentType,
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nsIMIMEInfo * aMIMEInfo);
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/**
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* Searches the "extra" array of MIMEInfo objects for an object
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* with a specific extension.
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*
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* Does not change the MIME Type of the MIME Info.
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*
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* @see GetMIMEInfoForMimeTypeFromExtras
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*/
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NS_HIDDEN_(nsresult) GetMIMEInfoForExtensionFromExtras(const nsACString& aExtension,
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nsIMIMEInfo * aMIMEInfo);
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/**
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* Searches the "extra" array for a MIME type, and gets its extension.
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* @param aExtension The extension to search for
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* @param aMIMEType [out] The found MIME type.
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* @return PR_TRUE if the extension was found, PR_FALSE otherwise.
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*/
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NS_HIDDEN_(PRBool) GetTypeFromExtras(const nsACString& aExtension,
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nsACString& aMIMEType);
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/**
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* Fixes the file permissions to be correct. Base class has a no-op
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* implementation, subclasses can use this to correctly inherit ACLs from the
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* parent directory, to make the permissions obey the umask, etc.
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*/
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virtual void FixFilePermissions(nsILocalFile* aFile);
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#ifdef PR_LOGGING
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/**
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* NSPR Logging Module. Usage: set NSPR_LOG_MODULES=HelperAppService:level,
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* where level should be 2 for errors, 3 for debug messages from the cross-
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* platform nsExternalHelperAppService, and 4 for os-specific debug messages.
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*/
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static PRLogModuleInfo* mLog;
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#endif
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// friend, so that it can access the nspr log module and FixFilePermissions
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friend class nsExternalAppHandler;
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/**
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* Functions related to the tempory file cleanup service provided by
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* nsExternalHelperAppService
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*/
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NS_HIDDEN_(nsresult) ExpungeTemporaryFiles();
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/**
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* Array for the files that should be deleted
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*/
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nsCOMArray<nsILocalFile> mTemporaryFilesList;
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/**
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* OS-specific loading of external URLs
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*/
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virtual NS_HIDDEN_(nsresult) LoadUriInternal(nsIURI * aURL) = 0;
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NS_HIDDEN_(PRBool) isExternalLoadOK(nsIURI* aURI, nsIPrompt* aPrompt);
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NS_HIDDEN_(PRBool) promptForScheme(nsIURI* aURI, nsIPrompt* aPrompt, PRBool *aRemember);
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// friend event handler that accesses the external loading functions
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static void *PR_CALLBACK handleExternalLoadEvent(PLEvent *event);
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};
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/**
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* We need to read the data out of the incoming stream into a buffer which we
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* can then use to write the data into the output stream representing the
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* temp file.
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*/
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#define DATA_BUFFER_SIZE (4096*2)
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/**
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* An external app handler is just a small little class that presents itself as
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* a nsIStreamListener. It saves the incoming data into a temp file. The handler
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* is bound to an application when it is created. When it receives an
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* OnStopRequest it launches the application using the temp file it has
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* stored the data into. We create a handler every time we have to process
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* data using a helper app.
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*/
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class nsExternalAppHandler : public nsIStreamListener,
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public nsIHelperAppLauncher
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSISTREAMLISTENER
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NS_DECL_NSIREQUESTOBSERVER
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NS_DECL_NSIHELPERAPPLAUNCHER
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NS_DECL_NSICANCELABLE
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/**
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* @param aMIMEInfo MIMEInfo object, representing the type of the
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* content that should be handled
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* @param aFileExtension The extension we need to append to our temp file,
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* INCLUDING the ".". e.g. .mp3
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* @param aWindowContext Window context, as passed to DoContent
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* @param aFileName The filename to use
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* @param aReason A constant from nsIHelperAppLauncherDialog indicating
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* why the request is handled by a helper app.
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*/
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nsExternalAppHandler(nsIMIMEInfo * aMIMEInfo, const nsCSubstring& aFileExtension,
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nsIInterfaceRequestor * aWindowContext,
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const nsAString& aFilename,
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PRUint32 aReason);
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~nsExternalAppHandler();
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protected:
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nsCOMPtr<nsIFile> mTempFile;
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nsCOMPtr<nsIURI> mSourceUrl;
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nsString mTempFileExtension;
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/**
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* The MIME Info for this load. Will never be null.
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*/
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nsCOMPtr<nsIMIMEInfo> mMimeInfo;
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nsCOMPtr<nsIOutputStream> mOutStream; /**< output stream to the temp file */
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nsCOMPtr<nsIInterfaceRequestor> mWindowContext;
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/**
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* The following field is set if we were processing an http channel that had
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* a content disposition header which specified the SUGGESTED file name we
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* should present to the user in the save to disk dialog.
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*/
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nsString mSuggestedFileName;
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/**
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* The canceled flag is set if the user canceled the launching of this
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* application before we finished saving the data to a temp file.
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*/
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PRPackedBool mCanceled;
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/**
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* have we received information from the user about how they want to
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* dispose of this content
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*/
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PRPackedBool mReceivedDispositionInfo;
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PRPackedBool mStopRequestIssued;
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PRPackedBool mProgressListenerInitialized;
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PRPackedBool mIsFileChannel;
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/**
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* One of the REASON_ constants from nsIHelperAppLauncherDialog. Indicates the
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* reason the dialog was shown (unknown content type, server requested it,
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* etc).
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*/
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PRUint32 mReason;
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PRTime mTimeDownloadStarted;
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nsInt64 mContentLength;
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nsInt64 mProgress; /**< Number of bytes received (for sending progress notifications). */
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/**
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* When we are told to save the temp file to disk (in a more permament
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* location) before we are done writing the content to a temp file, then
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* we need to remember the final destination until we are ready to use it.
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*/
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nsCOMPtr<nsIFile> mFinalFileDestination;
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char mDataBuffer[DATA_BUFFER_SIZE];
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/**
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* Creates the temporary file for the download and an output stream for it.
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* Upon successful return, both mTempFile and mOutStream will be valid.
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*/
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nsresult SetUpTempFile(nsIChannel * aChannel);
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/**
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* When we download a helper app, we are going to retarget all load
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* notifications into our own docloader and load group instead of
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* using the window which initiated the load....RetargetLoadNotifications
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* contains that information...
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*/
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void RetargetLoadNotifications(nsIRequest *request);
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/**
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* If the user tells us how they want to dispose of the content and
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* we still haven't finished downloading while they were deciding,
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* then create a progress listener of some kind so they know
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* what's going on...
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*/
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nsresult CreateProgressListener();
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nsresult PromptForSaveToFile(nsILocalFile ** aNewFile,
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const nsAFlatString &aDefaultFile,
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const nsAFlatString &aDefaultFileExt);
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/**
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* After we're done prompting the user for any information, if the original
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* channel had a refresh url associated with it (which might point to a
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* "thank you for downloading" kind of page, then process that....It is safe
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* to invoke this method multiple times. We'll clear mOriginalChannel after
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* it's called and this ensures we won't call it again....
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*/
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void ProcessAnyRefreshTags();
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/**
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* An internal method used to actually move the temp file to the final
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* destination once we done receiving data AND have showed the progress dialog
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*/
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nsresult MoveFile(nsIFile * aNewFileLocation);
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/**
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* An internal method used to actually launch a helper app given the temp file
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* once we are done receiving data AND have showed the progress dialog.
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* Uses the application specified in the mime info.
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*/
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nsresult OpenWithApplication();
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/**
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* Helper routine which peaks at the mime action specified by mMimeInfo
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* and calls either MoveFile or OpenWithApplication
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*/
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nsresult ExecuteDesiredAction();
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/**
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* Helper routine that searches a pref string for a given mime type
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*/
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PRBool GetNeverAskFlagFromPref(const char * prefName, const char * aContentType);
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/**
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* Initialize an nsITransfer object for use as a progress object
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*/
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nsresult InitializeDownload(nsITransfer*);
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/**
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* Helper routine to ensure mSuggestedFileName is "correct";
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* this ensures that mTempFileExtension only contains an extension when it
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* is different from mSuggestedFileName's extension.
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*/
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void EnsureSuggestedFileName();
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typedef enum { kReadError, kWriteError, kLaunchError } ErrorType;
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/**
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* Utility function to send proper error notification to web progress listener
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*/
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void SendStatusChange(ErrorType type, nsresult aStatus, nsIRequest *aRequest, const nsAFlatString &path);
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nsCOMPtr<nsIWebProgressListener2> mWebProgressListener;
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nsCOMPtr<nsIChannel> mOriginalChannel; /**< in the case of a redirect, this will be the pre-redirect channel. */
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nsCOMPtr<nsIHelperAppLauncherDialog> mDialog;
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/**
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* The request that's being loaded. Not used after OnStopRequest, so a weak
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* reference suffices. Initialized in OnStartRequest.
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*/
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nsIRequest* mRequest;
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};
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#endif // nsExternalHelperAppService_h__
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