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