Software: Apache. PHP/5.5.15 uname -a: Windows NT SVR-DMZ 6.1 build 7600 (Windows Server 2008 R2 Enterprise Edition) i586 SYSTEM Safe-mode: OFF (not secure) C:\Extranet\C\Archivos de programa\Mozilla Firefox\components\ drwxrwxrwx | |
| Viewing file: Select action/file-type: /* ***** 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 Mozilla.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Myk Melez <myk@mozilla.org>
* Dan Mosedale <dmose@mozilla.org>
* Florian Queze <florian@queze.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 ***** */
const Ci = Components.interfaces;
const Cc = Components.classes;
const Cu = Components.utils;
const Cr = Components.results;
const CLASS_MIMEINFO = "mimetype";
const CLASS_PROTOCOLINFO = "scheme";
// namespace prefix
const NC_NS = "http://home.netscape.com/NC-rdf#";
// the most recent default handlers that have been injected. Note that
// this is used to construct an RDF resource, which needs to have NC_NS
// prepended, since that hasn't been done yet
const DEFAULT_HANDLERS_VERSION = "defaultHandlersVersion";
// type list properties
const NC_MIME_TYPES = NC_NS + "MIME-types";
const NC_PROTOCOL_SCHEMES = NC_NS + "Protocol-Schemes";
// content type ("type") properties
// nsIHandlerInfo::type
const NC_VALUE = NC_NS + "value";
const NC_DESCRIPTION = NC_NS + "description";
// additional extensions
const NC_FILE_EXTENSIONS = NC_NS + "fileExtensions";
// references nsIHandlerInfo record
const NC_HANDLER_INFO = NC_NS + "handlerProp";
// handler info ("info") properties
// nsIHandlerInfo::preferredAction
const NC_SAVE_TO_DISK = NC_NS + "saveToDisk";
const NC_HANDLE_INTERNALLY = NC_NS + "handleInternal";
const NC_USE_SYSTEM_DEFAULT = NC_NS + "useSystemDefault";
// nsIHandlerInfo::alwaysAskBeforeHandling
const NC_ALWAYS_ASK = NC_NS + "alwaysAsk";
// references nsIHandlerApp records
const NC_PREFERRED_APP = NC_NS + "externalApplication";
const NC_POSSIBLE_APP = NC_NS + "possibleApplication";
// handler app ("handler") properties
// nsIHandlerApp::name
const NC_PRETTY_NAME = NC_NS + "prettyName";
// nsILocalHandlerApp::executable
const NC_PATH = NC_NS + "path";
// nsIWebHandlerApp::uriTemplate
const NC_URI_TEMPLATE = NC_NS + "uriTemplate";
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
function HandlerService() {
this._init();
}
HandlerService.prototype = {
//**************************************************************************//
// XPCOM Plumbing
classDescription: "Handler Service",
classID: Components.ID("{32314cc8-22f7-4f7f-a645-1a45453ba6a6}"),
contractID: "@mozilla.org/uriloader/handler-service;1",
QueryInterface: XPCOMUtils.generateQI([Ci.nsIHandlerService]),
//**************************************************************************//
// Initialization & Destruction
_init: function HS__init() {
// Observe profile-before-change so we can switch to the datasource
// in the new profile when the user changes profiles.
this._observerSvc.addObserver(this, "profile-before-change", false);
// Observe xpcom-shutdown so we can remove these observers
// when the application shuts down.
this._observerSvc.addObserver(this, "xpcom-shutdown", false);
// Observe profile-do-change so that non-default profiles get upgraded too
this._observerSvc.addObserver(this, "profile-do-change", false);
// do any necessary updating of the datastore
this._updateDB();
},
_updateDB: function HS__updateDB() {
try {
var defaultHandlersVersion = this._datastoreDefaultHandlersVersion;
} catch(ex) {
// accessing the datastore failed, we can't update anything
return;
}
try {
// if we don't have the current version of the default prefs for
// this locale, inject any new default handers into the datastore
if (defaultHandlersVersion < this._prefsDefaultHandlersVersion) {
// set the new version first so that if we recurse we don't
// call _injectNewDefaults several times
this._datastoreDefaultHandlersVersion =
this._prefsDefaultHandlersVersion;
this._injectNewDefaults();
}
} catch (ex) {
// if injecting the defaults failed, set the version back to the
// previous value
this._datastoreDefaultHandlersVersion = defaultHandlersVersion;
}
},
get _currentLocale() {
var chromeRegistry = Cc["@mozilla.org/chrome/chrome-registry;1"].
getService(Ci.nsIXULChromeRegistry);
var currentLocale = chromeRegistry.getSelectedLocale("global");
return currentLocale;
},
_destroy: function HS__destroy() {
this._observerSvc.removeObserver(this, "profile-before-change");
this._observerSvc.removeObserver(this, "xpcom-shutdown");
this._observerSvc.removeObserver(this, "profile-do-change");
// XXX Should we also null references to all the services that get stored
// by our memoizing getters in the Convenience Getters section?
},
_onProfileChange: function HS__onProfileChange() {
// Lose our reference to the datasource so we reacquire it
// from the new profile the next time we need it.
this.__ds = null;
},
_isInHandlerArray: function HS__isInHandlerArray(aArray, aHandler) {
var enumerator = aArray.enumerate();
while (enumerator.hasMoreElements()) {
let handler = enumerator.getNext();
handler.QueryInterface(Ci.nsIHandlerApp);
if (handler.equals(aHandler))
return true;
}
return false;
},
// note that this applies to the current locale only
get _datastoreDefaultHandlersVersion() {
var version = this._getValue("urn:root", NC_NS + this._currentLocale +
"_" + DEFAULT_HANDLERS_VERSION);
return version ? version : -1;
},
set _datastoreDefaultHandlersVersion(aNewVersion) {
return this._setLiteral("urn:root", NC_NS + this._currentLocale + "_" +
DEFAULT_HANDLERS_VERSION, aNewVersion);
},
get _prefsDefaultHandlersVersion() {
// get handler service pref branch
var prefSvc = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService);
var handlerSvcBranch = prefSvc.getBranch("gecko.handlerService.");
// get the version of the preferences for this locale
return Number(handlerSvcBranch.
getComplexValue("defaultHandlersVersion",
Ci.nsIPrefLocalizedString).data);
},
_injectNewDefaults: function HS__injectNewDefaults() {
// get handler service pref branch
var prefSvc = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService);
let schemesPrefBranch = prefSvc.getBranch("gecko.handlerService.schemes.");
let schemePrefList = schemesPrefBranch.getChildList("", {});
var schemes = {};
// read all the scheme prefs into a hash
for each (var schemePrefName in schemePrefList) {
let [scheme, handlerNumber, attribute] = schemePrefName.split(".");
try {
var attrData =
schemesPrefBranch.getComplexValue(schemePrefName,
Ci.nsIPrefLocalizedString).data;
if (!(scheme in schemes))
schemes[scheme] = {};
if (!(handlerNumber in schemes[scheme]))
schemes[scheme][handlerNumber] = {};
schemes[scheme][handlerNumber][attribute] = attrData;
} catch (ex) {}
}
let protoSvc = Cc["@mozilla.org/uriloader/external-protocol-service;1"].
getService(Ci.nsIExternalProtocolService);
for (var scheme in schemes) {
// This clause is essentially a reimplementation of
// nsIExternalProtocolHandlerService.getProtocolHandlerInfo().
// Necessary because calling that from here would make XPConnect barf
// when getService tried to re-enter the constructor for this
// service.
let osDefaultHandlerFound = {};
let protoInfo = protoSvc.getProtocolHandlerInfoFromOS(scheme,
osDefaultHandlerFound);
if (this.exists(protoInfo))
this.fillHandlerInfo(protoInfo, null);
else
protoSvc.setProtocolHandlerDefaults(protoInfo,
osDefaultHandlerFound.value);
// cache the possible handlers to avoid extra xpconnect traversals.
let possibleHandlers = protoInfo.possibleApplicationHandlers;
for each (var handlerPrefs in schemes[scheme]) {
let handlerApp = Cc["@mozilla.org/uriloader/web-handler-app;1"].
createInstance(Ci.nsIWebHandlerApp);
handlerApp.uriTemplate = handlerPrefs.uriTemplate;
handlerApp.name = handlerPrefs.name;
if (!this._isInHandlerArray(possibleHandlers, handlerApp)) {
possibleHandlers.appendElement(handlerApp, false);
}
}
this.store(protoInfo);
}
},
//**************************************************************************//
// nsIObserver
observe: function HS__observe(subject, topic, data) {
switch(topic) {
case "profile-before-change":
this._onProfileChange();
break;
case "xpcom-shutdown":
this._destroy();
break;
case "profile-do-change":
this._updateDB();
break;
}
},
//**************************************************************************//
// nsIHandlerService
enumerate: function HS_enumerate() {
var handlers = Cc["@mozilla.org/array;1"].
createInstance(Ci.nsIMutableArray);
this._appendHandlers(handlers, CLASS_MIMEINFO);
this._appendHandlers(handlers, CLASS_PROTOCOLINFO);
return handlers.enumerate();
},
fillHandlerInfo: function HS_fillHandlerInfo(aHandlerInfo, aOverrideType) {
var type = aOverrideType || aHandlerInfo.type;
var typeID = this._getTypeID(this._getClass(aHandlerInfo), type);
// Determine whether or not information about this handler is available
// in the datastore by looking for its "value" property, which stores its
// type and should always be present.
if (!this._hasValue(typeID, NC_VALUE))
throw Cr.NS_ERROR_NOT_AVAILABLE;
// Retrieve the human-readable description of the type.
if (this._hasValue(typeID, NC_DESCRIPTION))
aHandlerInfo.description = this._getValue(typeID, NC_DESCRIPTION);
// Note: for historical reasons, we don't actually check that the type
// record has a "handlerProp" property referencing the info record. It's
// unclear whether or not we should start doing this check; perhaps some
// legacy datasources don't have such references.
var infoID = this._getInfoID(this._getClass(aHandlerInfo), type);
aHandlerInfo.preferredAction = this._retrievePreferredAction(infoID);
var preferredHandlerID =
this._getPreferredHandlerID(this._getClass(aHandlerInfo), type);
// Retrieve the preferred handler.
// Note: for historical reasons, we don't actually check that the info
// record has an "externalApplication" property referencing the preferred
// handler record. It's unclear whether or not we should start doing
// this check; perhaps some legacy datasources don't have such references.
aHandlerInfo.preferredApplicationHandler =
this._retrieveHandlerApp(preferredHandlerID);
// Fill the array of possible handlers with the ones in the datastore.
this._fillPossibleHandlers(infoID,
aHandlerInfo.possibleApplicationHandlers,
aHandlerInfo.preferredApplicationHandler);
// If we have an "always ask" flag stored in the RDF, always use its
// value. Otherwise, use the default value stored in the pref service.
var alwaysAsk;
if (this._hasValue(infoID, NC_ALWAYS_ASK)) {
alwaysAsk = (this._getValue(infoID, NC_ALWAYS_ASK) != "false");
} else {
var prefSvc = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService);
var prefBranch = prefSvc.getBranch("network.protocol-handler.");
try {
alwaysAsk = prefBranch.getBoolPref("warn-external." + type);
} catch (e) {
// will throw if pref didn't exist.
try {
alwaysAsk = prefBranch.getBoolPref("warn-external-default");
} catch (e) {
// Nothing to tell us what to do, so be paranoid and prompt.
alwaysAsk = true;
}
}
}
aHandlerInfo.alwaysAskBeforeHandling = alwaysAsk;
// If the object represents a MIME type handler, then also retrieve
// any file extensions.
if (aHandlerInfo instanceof Ci.nsIMIMEInfo)
for each (let fileExtension in this._retrieveFileExtensions(typeID))
aHandlerInfo.appendExtension(fileExtension);
},
store: function HS_store(aHandlerInfo) {
// FIXME: when we switch from RDF to something with transactions (like
// SQLite), enclose the following changes in a transaction so they all
// get rolled back if any of them fail and we don't leave the datastore
// in an inconsistent state.
this._ensureRecordsForType(aHandlerInfo);
this._storePreferredAction(aHandlerInfo);
this._storePreferredHandler(aHandlerInfo);
this._storePossibleHandlers(aHandlerInfo);
this._storeAlwaysAsk(aHandlerInfo);
// Write the changes to the database immediately so we don't lose them
// if the application crashes.
if (this._ds instanceof Ci.nsIRDFRemoteDataSource)
this._ds.Flush();
},
exists: function HS_exists(aHandlerInfo) {
var found;
try {
var typeID = this._getTypeID(this._getClass(aHandlerInfo), aHandlerInfo.type);
found = this._hasLiteralAssertion(typeID, NC_VALUE, aHandlerInfo.type);
} catch (e) {
// If the RDF threw (eg, corrupt file), treat as non-existent.
found = false;
}
return found;
},
remove: function HS_remove(aHandlerInfo) {
var preferredHandlerID =
this._getPreferredHandlerID(this._getClass(aHandlerInfo), aHandlerInfo.type);
this._removeAssertions(preferredHandlerID);
var infoID = this._getInfoID(this._getClass(aHandlerInfo), aHandlerInfo.type);
// Get a list of possible handlers. After we have removed the info record,
// we'll check if any other info records reference these handlers, and we'll
// remove the handler records that aren't referenced by other info records.
var possibleHandlerIDs = [];
var possibleHandlerTargets = this._getTargets(infoID, NC_POSSIBLE_APP);
while (possibleHandlerTargets.hasMoreElements()) {
let possibleHandlerTarget = possibleHandlerTargets.getNext();
// Note: possibleHandlerTarget should always be an nsIRDFResource.
// The conditional is just here in case of a corrupt RDF datasource.
if (possibleHandlerTarget instanceof Ci.nsIRDFResource)
possibleHandlerIDs.push(possibleHandlerTarget.ValueUTF8);
}
// Remove the info record.
this._removeAssertions(infoID);
// Now that we've removed the info record, remove any possible handlers
// that aren't referenced by other info records.
for each (let possibleHandlerID in possibleHandlerIDs)
if (!this._existsResourceTarget(NC_POSSIBLE_APP, possibleHandlerID))
this._removeAssertions(possibleHandlerID);
var typeID = this._getTypeID(this._getClass(aHandlerInfo), aHandlerInfo.type);
this._removeAssertions(typeID);
// Now that there's no longer a handler for this type, remove the type
// from the list of types for which there are known handlers.
var typeList = this._ensureAndGetTypeList(this._getClass(aHandlerInfo));
var type = this._rdf.GetResource(typeID);
var typeIndex = typeList.IndexOf(type);
if (typeIndex != -1)
typeList.RemoveElementAt(typeIndex, true);
// Write the changes to the database immediately so we don't lose them
// if the application crashes.
// XXX If we're removing a bunch of handlers at once, will flushing
// after every removal cause a significant performance hit?
if (this._ds instanceof Ci.nsIRDFRemoteDataSource)
this._ds.Flush();
},
getTypeFromExtension: function HS_getTypeFromExtension(aFileExtension) {
var fileExtension = aFileExtension.toLowerCase();
var typeID;
if (this._existsLiteralTarget(NC_FILE_EXTENSIONS, fileExtension))
typeID = this._getSourceForLiteral(NC_FILE_EXTENSIONS, fileExtension);
if (typeID && this._hasValue(typeID, NC_VALUE)) {
let type = this._getValue(typeID, NC_VALUE);
if (type == "")
throw Cr.NS_ERROR_FAILURE;
return type;
}
return "";
},
//**************************************************************************//
// Retrieval Methods
/**
* Retrieve the preferred action for the info record with the given ID.
*
* @param aInfoID {string} the info record ID
*
* @returns {integer} the preferred action enumeration value
*/
_retrievePreferredAction: function HS__retrievePreferredAction(aInfoID) {
if (this._getValue(aInfoID, NC_SAVE_TO_DISK) == "true")
return Ci.nsIHandlerInfo.saveToDisk;
if (this._getValue(aInfoID, NC_USE_SYSTEM_DEFAULT) == "true")
return Ci.nsIHandlerInfo.useSystemDefault;
if (this._getValue(aInfoID, NC_HANDLE_INTERNALLY) == "true")
return Ci.nsIHandlerInfo.handleInternal;
return Ci.nsIHandlerInfo.useHelperApp;
},
/**
* Fill an array of possible handlers with the handlers for the given info ID.
*
* @param aInfoID {string} the ID of the info record
* @param aPossibleHandlers {nsIMutableArray} the array of possible handlers
* @param aPreferredHandler {nsIHandlerApp} the preferred handler, if any
*/
_fillPossibleHandlers: function HS__fillPossibleHandlers(aInfoID,
aPossibleHandlers,
aPreferredHandler) {
// The set of possible handlers should include the preferred handler,
// but legacy datastores (from before we added possible handlers) won't
// include the preferred handler, so check if it's included as we build
// the list of handlers, and, if it's not included, add it to the list.
if (aPreferredHandler)
aPossibleHandlers.appendElement(aPreferredHandler, false);
var possibleHandlerTargets = this._getTargets(aInfoID, NC_POSSIBLE_APP);
while (possibleHandlerTargets.hasMoreElements()) {
let possibleHandlerTarget = possibleHandlerTargets.getNext();
if (!(possibleHandlerTarget instanceof Ci.nsIRDFResource))
continue;
let possibleHandlerID = possibleHandlerTarget.ValueUTF8;
let possibleHandler = this._retrieveHandlerApp(possibleHandlerID);
if (possibleHandler && (!aPreferredHandler ||
!possibleHandler.equals(aPreferredHandler)))
aPossibleHandlers.appendElement(possibleHandler, false);
}
},
/**
* Retrieve the handler app object with the given ID.
*
* @param aHandlerAppID {string} the ID of the handler app to retrieve
*
* @returns {nsIHandlerApp} the handler app, if any; otherwise null
*/
_retrieveHandlerApp: function HS__retrieveHandlerApp(aHandlerAppID) {
var handlerApp;
// If it has a path, it's a local handler; otherwise, it's a web handler.
if (this._hasValue(aHandlerAppID, NC_PATH)) {
let executable =
this._getFileWithPath(this._getValue(aHandlerAppID, NC_PATH));
if (!executable)
return null;
handlerApp = Cc["@mozilla.org/uriloader/local-handler-app;1"].
createInstance(Ci.nsILocalHandlerApp);
handlerApp.executable = executable;
}
else if (this._hasValue(aHandlerAppID, NC_URI_TEMPLATE)) {
let uriTemplate = this._getValue(aHandlerAppID, NC_URI_TEMPLATE);
if (!uriTemplate)
return null;
handlerApp = Cc["@mozilla.org/uriloader/web-handler-app;1"].
createInstance(Ci.nsIWebHandlerApp);
handlerApp.uriTemplate = uriTemplate;
}
else
return null;
handlerApp.name = this._getValue(aHandlerAppID, NC_PRETTY_NAME);
return handlerApp;
},
/*
* Retrieve file extensions, if any, for the MIME type with the given type ID.
*
* @param aTypeID {string} the type record ID
*/
_retrieveFileExtensions: function HS__retrieveFileExtensions(aTypeID) {
var fileExtensions = [];
var fileExtensionTargets = this._getTargets(aTypeID, NC_FILE_EXTENSIONS);
while (fileExtensionTargets.hasMoreElements()) {
let fileExtensionTarget = fileExtensionTargets.getNext();
if (fileExtensionTarget instanceof Ci.nsIRDFLiteral &&
fileExtensionTarget.Value != "")
fileExtensions.push(fileExtensionTarget.Value);
}
return fileExtensions;
},
/**
* Get the file with the given path. This is not as simple as merely
* initializing a local file object with the path, because the path might be
* relative to the current process directory, in which case we have to
* construct a path starting from that directory.
*
* @param aPath {string} a path to a file
*
* @returns {nsILocalFile} the file, or null if the file does not exist
*/
_getFileWithPath: function HS__getFileWithPath(aPath) {
var file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
try {
file.initWithPath(aPath);
if (file.exists())
return file;
}
catch(ex) {
// Note: for historical reasons, we don't actually check to see
// if the exception is NS_ERROR_FILE_UNRECOGNIZED_PATH, which is what
// nsILocalFile::initWithPath throws when a path is relative.
file = this._dirSvc.get("XCurProcD", Ci.nsIFile);
try {
file.append(aPath);
if (file.exists())
return file;
}
catch(ex) {}
}
return null;
},
//**************************************************************************//
// Storage Methods
_storePreferredAction: function HS__storePreferredAction(aHandlerInfo) {
var infoID = this._getInfoID(this._getClass(aHandlerInfo), aHandlerInfo.type);
switch(aHandlerInfo.preferredAction) {
case Ci.nsIHandlerInfo.saveToDisk:
this._setLiteral(infoID, NC_SAVE_TO_DISK, "true");
this._removeTarget(infoID, NC_HANDLE_INTERNALLY);
this._removeTarget(infoID, NC_USE_SYSTEM_DEFAULT);
break;
case Ci.nsIHandlerInfo.handleInternally:
this._setLiteral(infoID, NC_HANDLE_INTERNALLY, "true");
this._removeTarget(infoID, NC_SAVE_TO_DISK);
this._removeTarget(infoID, NC_USE_SYSTEM_DEFAULT);
break;
case Ci.nsIHandlerInfo.useSystemDefault:
this._setLiteral(infoID, NC_USE_SYSTEM_DEFAULT, "true");
this._removeTarget(infoID, NC_SAVE_TO_DISK);
this._removeTarget(infoID, NC_HANDLE_INTERNALLY);
break;
// This value is indicated in the datastore either by the absence of
// the three properties or by setting them all "false". Of these two
// options, the former seems preferable, because it reduces the size
// of the RDF file and thus the amount of stuff we have to parse.
case Ci.nsIHandlerInfo.useHelperApp:
default:
this._removeTarget(infoID, NC_SAVE_TO_DISK);
this._removeTarget(infoID, NC_HANDLE_INTERNALLY);
this._removeTarget(infoID, NC_USE_SYSTEM_DEFAULT);
break;
}
},
_storePreferredHandler: function HS__storePreferredHandler(aHandlerInfo) {
var infoID = this._getInfoID(this._getClass(aHandlerInfo), aHandlerInfo.type);
var handlerID =
this._getPreferredHandlerID(this._getClass(aHandlerInfo), aHandlerInfo.type);
var handler = aHandlerInfo.preferredApplicationHandler;
if (handler) {
this._storeHandlerApp(handlerID, handler);
// Make this app be the preferred app for the handler info.
//
// Note: nsExternalHelperAppService::FillContentHandlerProperties ignores
// this setting and instead identifies the preferred app as the resource
// whose URI follows the pattern urn:<class>:externalApplication:<type>.
// But the old downloadactions.js code used to set this property, so just
// in case there is still some code somewhere that relies on its presence,
// we set it here.
this._setResource(infoID, NC_PREFERRED_APP, handlerID);
}
else {
// There isn't a preferred handler. Remove the existing record for it,
// if any.
this._removeTarget(infoID, NC_PREFERRED_APP);
this._removeAssertions(handlerID);
}
},
/**
* Store the list of possible handler apps for the content type represented
* by the given handler info object.
*
* @param aHandlerInfo {nsIHandlerInfo} the handler info object
*/
_storePossibleHandlers: function HS__storePossibleHandlers(aHandlerInfo) {
var infoID = this._getInfoID(this._getClass(aHandlerInfo), aHandlerInfo.type);
// First, retrieve the set of handler apps currently stored for the type,
// keeping track of their IDs in a hash that we'll use to determine which
// ones are no longer valid and should be removed.
var currentHandlerApps = {};
var currentHandlerTargets = this._getTargets(infoID, NC_POSSIBLE_APP);
while (currentHandlerTargets.hasMoreElements()) {
let handlerApp = currentHandlerTargets.getNext();
if (handlerApp instanceof Ci.nsIRDFResource) {
let handlerAppID = handlerApp.ValueUTF8;
currentHandlerApps[handlerAppID] = true;
}
}
// Next, store any new handler apps.
var newHandlerApps =
aHandlerInfo.possibleApplicationHandlers.enumerate();
while (newHandlerApps.hasMoreElements()) {
let handlerApp =
newHandlerApps.getNext().QueryInterface(Ci.nsIHandlerApp);
let handlerAppID = this._getPossibleHandlerAppID(handlerApp);
if (!this._hasResourceAssertion(infoID, NC_POSSIBLE_APP, handlerAppID)) {
this._storeHandlerApp(handlerAppID, handlerApp);
this._addResourceAssertion(infoID, NC_POSSIBLE_APP, handlerAppID);
}
delete currentHandlerApps[handlerAppID];
}
// Finally, remove any old handler apps that aren't being used anymore,
// and if those handler apps aren't being used by any other type either,
// then completely remove their record from the datastore so we don't
// leave it clogged up with information about handler apps we don't care
// about anymore.
for (let handlerAppID in currentHandlerApps) {
this._removeResourceAssertion(infoID, NC_POSSIBLE_APP, handlerAppID);
if (!this._existsResourceTarget(NC_POSSIBLE_APP, handlerAppID))
this._removeAssertions(handlerAppID);
}
},
/**
* Store the given handler app.
*
* Note: the reason this method takes the ID of the handler app in a param
* is that the ID is different than it usually is when the handler app
* in question is a preferred handler app, so this method can't just derive
* the ID of the handler app by calling _getPossibleHandlerAppID, its callers
* have to do that for it.
*
* @param aHandlerAppID {string} the ID of the handler app to store
* @param aHandlerApp {nsIHandlerApp} the handler app to store
*/
_storeHandlerApp: function HS__storeHandlerApp(aHandlerAppID, aHandlerApp) {
aHandlerApp.QueryInterface(Ci.nsIHandlerApp);
this._setLiteral(aHandlerAppID, NC_PRETTY_NAME, aHandlerApp.name);
// In the case of the preferred handler, the handler ID could have been
// used to refer to a different kind of handler in the past (i.e. either
// a local hander or a web handler), so if the new handler is a local
// handler, then we remove any web handler properties and vice versa.
// This is unnecessary but harmless for possible handlers.
if (aHandlerApp instanceof Ci.nsILocalHandlerApp) {
this._setLiteral(aHandlerAppID, NC_PATH, aHandlerApp.executable.path);
this._removeTarget(aHandlerAppID, NC_URI_TEMPLATE);
}
else {
aHandlerApp.QueryInterface(Ci.nsIWebHandlerApp);
this._setLiteral(aHandlerAppID, NC_URI_TEMPLATE, aHandlerApp.uriTemplate);
this._removeTarget(aHandlerAppID, NC_PATH);
}
},
_storeAlwaysAsk: function HS__storeAlwaysAsk(aHandlerInfo) {
var infoID = this._getInfoID(this._getClass(aHandlerInfo), aHandlerInfo.type);
this._setLiteral(infoID,
NC_ALWAYS_ASK,
aHandlerInfo.alwaysAskBeforeHandling ? "true" : "false");
},
//**************************************************************************//
// Convenience Getters
// Observer Service
__observerSvc: null,
get _observerSvc() {
if (!this.__observerSvc)
this.__observerSvc =
Cc["@mozilla.org/observer-service;1"].
getService(Ci.nsIObserverService);
return this.__observerSvc;
},
// Directory Service
__dirSvc: null,
get _dirSvc() {
if (!this.__dirSvc)
this.__dirSvc =
Cc["@mozilla.org/file/directory_service;1"].
getService(Ci.nsIProperties);
return this.__dirSvc;
},
// MIME Service
__mimeSvc: null,
get _mimeSvc() {
if (!this.__mimeSvc)
this.__mimeSvc =
Cc["@mozilla.org/mime;1"].
getService(Ci.nsIMIMEService);
return this.__mimeSvc;
},
// Protocol Service
__protocolSvc: null,
get _protocolSvc() {
if (!this.__protocolSvc)
this.__protocolSvc =
Cc["@mozilla.org/uriloader/external-protocol-service;1"].
getService(Ci.nsIExternalProtocolService);
return this.__protocolSvc;
},
// RDF Service
__rdf: null,
get _rdf() {
if (!this.__rdf)
this.__rdf = Cc["@mozilla.org/rdf/rdf-service;1"].
getService(Ci.nsIRDFService);
return this.__rdf;
},
// RDF Container Utils
__containerUtils: null,
get _containerUtils() {
if (!this.__containerUtils)
this.__containerUtils = Cc["@mozilla.org/rdf/container-utils;1"].
getService(Ci.nsIRDFContainerUtils);
return this.__containerUtils;
},
// RDF datasource containing content handling config (i.e. mimeTypes.rdf)
__ds: null,
get _ds() {
if (!this.__ds) {
var file = this._dirSvc.get("UMimTyp", Ci.nsIFile);
// FIXME: make this a memoizing getter if we use it anywhere else.
var ioService = Cc["@mozilla.org/network/io-service;1"].
getService(Ci.nsIIOService);
var fileHandler = ioService.getProtocolHandler("file").
QueryInterface(Ci.nsIFileProtocolHandler);
this.__ds =
this._rdf.GetDataSourceBlocking(fileHandler.getURLSpecFromFile(file));
}
return this.__ds;
},
//**************************************************************************//
// Datastore Utils
/**
* Get the string identifying whether this is a MIME or a protocol handler.
* This string is used in the URI IDs of various RDF properties.
*
* @param aHandlerInfo {nsIHandlerInfo} the handler for which to get the class
*
* @returns {string} the class
*/
_getClass: function HS__getClass(aHandlerInfo) {
if (aHandlerInfo instanceof Ci.nsIMIMEInfo)
return CLASS_MIMEINFO;
else
return CLASS_PROTOCOLINFO;
},
/**
* Return the unique identifier for a content type record, which stores
* the value field plus a reference to the content type's handler info record.
*
* |urn:<class>:<type>|
*
* XXX: should this be a property of nsIHandlerInfo?
*
* @param aClass {string} the class (CLASS_MIMEINFO or CLASS_PROTOCOLINFO)
* @param aType {string} the type (a MIME type or protocol scheme)
*
* @returns {string} the ID
*/
_getTypeID: function HS__getTypeID(aClass, aType) {
return "urn:" + aClass + ":" + aType;
},
/**
* Return the unique identifier for a handler info record, which stores
* the preferredAction and alwaysAsk fields plus a reference to the preferred
* handler app. Roughly equivalent to the nsIHandlerInfo interface.
*
* |urn:<class>:handler:<type>|
*
* FIXME: the type info record should be merged into the type record,
* since there's a one to one relationship between them, and this record
* merely stores additional attributes of a content type.
*
* @param aClass {string} the class (CLASS_MIMEINFO or CLASS_PROTOCOLINFO)
* @param aType {string} the type (a MIME type or protocol scheme)
*
* @returns {string} the ID
*/
_getInfoID: function HS__getInfoID(aClass, aType) {
return "urn:" + aClass + ":handler:" + aType;
},
/**
* Return the unique identifier for a preferred handler record, which stores
* information about the preferred handler for a given content type, including
* its human-readable name and the path to its executable (for a local app)
* or its URI template (for a web app).
*
* |urn:<class>:externalApplication:<type>|
*
* XXX: should this be a property of nsIHandlerApp?
*
* FIXME: this should be an arbitrary ID, and we should retrieve it from
* the datastore for a given content type via the NC:ExternalApplication
* property rather than looking for a specific ID, so a handler doesn't
* have to change IDs when it goes from being a possible handler to being
* the preferred one (once we support possible handlers).
*
* @param aClass {string} the class (CLASS_MIMEINFO or CLASS_PROTOCOLINFO)
* @param aType {string} the type (a MIME type or protocol scheme)
*
* @returns {string} the ID
*/
_getPreferredHandlerID: function HS__getPreferredHandlerID(aClass, aType) {
return "urn:" + aClass + ":externalApplication:" + aType;
},
/**
* Return the unique identifier for a handler app record, which stores
* information about a possible handler for one or more content types,
* including its human-readable name and the path to its executable (for a
* local app) or its URI template (for a web app).
*
* Note: handler app IDs for preferred handlers are different. For those,
* see the _getPreferredHandlerID method.
*
* @param aHandlerApp {nsIHandlerApp} the handler app object
*/
_getPossibleHandlerAppID: function HS__getPossibleHandlerAppID(aHandlerApp) {
var handlerAppID = "urn:handler:";
if (aHandlerApp instanceof Ci.nsILocalHandlerApp)
handlerAppID += "local:" + aHandlerApp.executable.path;
else {
aHandlerApp.QueryInterface(Ci.nsIWebHandlerApp);
handlerAppID += "web:" + aHandlerApp.uriTemplate;
}
return handlerAppID;
},
/**
* Get the list of types for the given class, creating the list if it doesn't
* already exist. The class can be either CLASS_MIMEINFO or CLASS_PROTOCOLINFO
* (i.e. the result of a call to _getClass).
*
* |urn:<class>s|
* |urn:<class>s:root|
*
* @param aClass {string} the class for which to retrieve a list of types
*
* @returns {nsIRDFContainer} the list of types
*/
_ensureAndGetTypeList: function HS__ensureAndGetTypeList(aClass) {
var source = this._rdf.GetResource("urn:" + aClass + "s");
var property =
this._rdf.GetResource(aClass == CLASS_MIMEINFO ? NC_MIME_TYPES
: NC_PROTOCOL_SCHEMES);
var target = this._rdf.GetResource("urn:" + aClass + "s:root");
// Make sure we have an arc from the source to the target.
if (!this._ds.HasAssertion(source, property, target, true))
this._ds.Assert(source, property, target, true);
// Make sure the target is a container.
if (!this._containerUtils.IsContainer(this._ds, target))
this._containerUtils.MakeSeq(this._ds, target);
// Get the type list as an RDF container.
var typeList = Cc["@mozilla.org/rdf/container;1"].
createInstance(Ci.nsIRDFContainer);
typeList.Init(this._ds, target);
return typeList;
},
/**
* Make sure there are records in the datasource for the given content type
* by creating them if they don't already exist. We have to do this before
* storing any specific data, because we can't assume the presence
* of the records (the nsIHandlerInfo object might have been created
* from the OS), and the records have to all be there in order for the helper
* app service to properly construct an nsIHandlerInfo object for the type.
*
* Based on old downloadactions.js::_ensureMIMERegistryEntry.
*
* @param aHandlerInfo {nsIHandlerInfo} the type to make sure has a record
*/
_ensureRecordsForType: function HS__ensureRecordsForType(aHandlerInfo) {
// Get the list of types.
var typeList = this._ensureAndGetTypeList(this._getClass(aHandlerInfo));
// If there's already a record in the datastore for this type, then we
// don't need to do anything more.
var typeID = this._getTypeID(this._getClass(aHandlerInfo), aHandlerInfo.type);
var type = this._rdf.GetResource(typeID);
if (typeList.IndexOf(type) != -1)
return;
// Create a basic type record for this type.
typeList.AppendElement(type);
this._setLiteral(typeID, NC_VALUE, aHandlerInfo.type);
// Create a basic info record for this type.
var infoID = this._getInfoID(this._getClass(aHandlerInfo), aHandlerInfo.type);
this._setLiteral(infoID, NC_ALWAYS_ASK, "false");
this._setResource(typeID, NC_HANDLER_INFO, infoID);
// XXX Shouldn't we set preferredAction to useSystemDefault?
// That's what it is if there's no record in the datastore; why should it
// change to useHelperApp just because we add a record to the datastore?
// Create a basic preferred handler record for this type.
// XXX Not sure this is necessary, since preferred handlers are optional,
// and nsExternalHelperAppService::FillHandlerInfoForTypeFromDS doesn't seem
// to require the record , but downloadactions.js::_ensureMIMERegistryEntry
// used to create it, so we'll do the same.
var preferredHandlerID =
this._getPreferredHandlerID(this._getClass(aHandlerInfo), aHandlerInfo.type);
this._setLiteral(preferredHandlerID, NC_PATH, "");
this._setResource(infoID, NC_PREFERRED_APP, preferredHandlerID);
},
/**
* Append known handlers of the given class to the given array. The class
* can be either CLASS_MIMEINFO or CLASS_PROTOCOLINFO.
*
* @param aHandlers {array} the array of handlers to append to
* @param aClass {string} the class for which to append handlers
*/
_appendHandlers: function HS__appendHandlers(aHandlers, aClass) {
var typeList = this._ensureAndGetTypeList(aClass);
var enumerator = typeList.GetElements();
while (enumerator.hasMoreElements()) {
var element = enumerator.getNext();
// This should never happen. If it does, that means our datasource
// is corrupted with type list entries that point to literal values
// instead of resources. If it does happen, let's just do our best
// to recover by ignoring this entry and moving on to the next one.
if (!(element instanceof Ci.nsIRDFResource))
continue;
// Get the value of the element's NC:value property, which contains
// the MIME type or scheme for which we're retrieving a handler info.
var type = this._getValue(element.ValueUTF8, NC_VALUE);
if (!type)
continue;
var handler;
if (typeList.Resource.ValueUTF8 == "urn:mimetypes:root")
handler = this._mimeSvc.getFromTypeAndExtension(type, null);
else
handler = this._protocolSvc.getProtocolHandlerInfo(type);
aHandlers.appendElement(handler, false);
}
},
/**
* Whether or not a property of an RDF source has a value.
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
* @returns {boolean} whether or not the property has a value
*/
_hasValue: function HS__hasValue(sourceURI, propertyURI) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
return this._ds.hasArcOut(source, property);
},
/**
* Get the value of a property of an RDF source.
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
* @returns {string} the value of the property
*/
_getValue: function HS__getValue(sourceURI, propertyURI) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
var target = this._ds.GetTarget(source, property, true);
if (!target)
return null;
if (target instanceof Ci.nsIRDFResource)
return target.ValueUTF8;
if (target instanceof Ci.nsIRDFLiteral)
return target.Value;
return null;
},
/**
* Get all targets for the property of an RDF source.
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
*
* @returns {nsISimpleEnumerator} an enumerator of targets
*/
_getTargets: function HS__getTargets(sourceURI, propertyURI) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
return this._ds.GetTargets(source, property, true);
},
/**
* Set a property of an RDF source to a literal value.
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
* @param value {string} the literal value
*/
_setLiteral: function HS__setLiteral(sourceURI, propertyURI, value) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
var target = this._rdf.GetLiteral(value);
this._setTarget(source, property, target);
},
/**
* Set a property of an RDF source to a resource target.
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
* @param targetURI {string} the URI of the target
*/
_setResource: function HS__setResource(sourceURI, propertyURI, targetURI) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
var target = this._rdf.GetResource(targetURI);
this._setTarget(source, property, target);
},
/**
* Assert an arc into the RDF datasource if there is no arc with the given
* source and property; otherwise, if there is already an existing arc,
* change it to point to the given target. _setLiteral and _setResource
* call this after converting their string arguments into resources
* and literals, and most callers should call one of those two methods
* instead of this one.
*
* @param source {nsIRDFResource} the source
* @param property {nsIRDFResource} the property
* @param target {nsIRDFNode} the target
*/
_setTarget: function HS__setTarget(source, property, target) {
if (this._ds.hasArcOut(source, property)) {
var oldTarget = this._ds.GetTarget(source, property, true);
this._ds.Change(source, property, oldTarget, target);
}
else
this._ds.Assert(source, property, target, true);
},
/**
* Assert that a property of an RDF source has a resource target.
*
* The difference between this method and _setResource is that this one adds
* an assertion even if one already exists, which allows its callers to make
* sets of assertions (i.e. to set a property to multiple targets).
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
* @param targetURI {string} the URI of the target
*/
_addResourceAssertion: function HS__addResourceAssertion(sourceURI,
propertyURI,
targetURI) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
var target = this._rdf.GetResource(targetURI);
this._ds.Assert(source, property, target, true);
},
/**
* Remove an assertion with a resource target.
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
* @param targetURI {string} the URI of the target
*/
_removeResourceAssertion: function HS__removeResourceAssertion(sourceURI,
propertyURI,
targetURI) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
var target = this._rdf.GetResource(targetURI);
this._ds.Unassert(source, property, target);
},
/**
* Whether or not a property of an RDF source has a given resource target.
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
* @param targetURI {string} the URI of the target
*
* @returns {boolean} whether or not there is such an assertion
*/
_hasResourceAssertion: function HS__hasResourceAssertion(sourceURI,
propertyURI,
targetURI) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
var target = this._rdf.GetResource(targetURI);
return this._ds.HasAssertion(source, property, target, true);
},
/**
* Whether or not a property of an RDF source has a given literal value.
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
* @param value {string} the literal value
*
* @returns {boolean} whether or not there is such an assertion
*/
_hasLiteralAssertion: function HS__hasLiteralAssertion(sourceURI,
propertyURI,
value) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
var target = this._rdf.GetLiteral(value);
return this._ds.HasAssertion(source, property, target, true);
},
/**
* Whether or not there is an RDF source that has the given property set to
* the given literal value.
*
* @param propertyURI {string} the URI of the property
* @param value {string} the literal value
*
* @returns {boolean} whether or not there is a source
*/
_existsLiteralTarget: function HS__existsLiteralTarget(propertyURI, value) {
var property = this._rdf.GetResource(propertyURI);
var target = this._rdf.GetLiteral(value);
return this._ds.hasArcIn(target, property);
},
/**
* Get the source for a property set to a given literal value.
*
* @param propertyURI {string} the URI of the property
* @param value {string} the literal value
*/
_getSourceForLiteral: function HS__getSourceForLiteral(propertyURI, value) {
var property = this._rdf.GetResource(propertyURI);
var target = this._rdf.GetLiteral(value);
var source = this._ds.GetSource(property, target, true);
if (source)
return source.ValueUTF8;
return null;
},
/**
* Whether or not there is an RDF source that has the given property set to
* the given resource target.
*
* @param propertyURI {string} the URI of the property
* @param targetURI {string} the URI of the target
*
* @returns {boolean} whether or not there is a source
*/
_existsResourceTarget: function HS__existsResourceTarget(propertyURI,
targetURI) {
var property = this._rdf.GetResource(propertyURI);
var target = this._rdf.GetResource(targetURI);
return this._ds.hasArcIn(target, property);
},
/**
* Remove a property of an RDF source.
*
* @param sourceURI {string} the URI of the source
* @param propertyURI {string} the URI of the property
*/
_removeTarget: function HS__removeTarget(sourceURI, propertyURI) {
var source = this._rdf.GetResource(sourceURI);
var property = this._rdf.GetResource(propertyURI);
if (this._ds.hasArcOut(source, property)) {
var target = this._ds.GetTarget(source, property, true);
this._ds.Unassert(source, property, target);
}
},
/**
* Remove all assertions about a given RDF source.
*
* Note: not recursive. If some assertions point to other resources,
* and you want to remove assertions about those resources too, you need
* to do so manually.
*
* @param sourceURI {string} the URI of the source
*/
_removeAssertions: function HS__removeAssertions(sourceURI) {
var source = this._rdf.GetResource(sourceURI);
var properties = this._ds.ArcLabelsOut(source);
while (properties.hasMoreElements()) {
let property = properties.getNext();
let targets = this._ds.GetTargets(source, property, true);
while (targets.hasMoreElements()) {
let target = targets.getNext();
this._ds.Unassert(source, property, target);
}
}
}
};
//****************************************************************************//
// More XPCOM Plumbing
function NSGetModule(compMgr, fileSpec) {
return XPCOMUtils.generateModule([HandlerService]);
}
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