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gecko-dev/browser/components/search/nsSearchService.js

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JavaScript
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# ***** 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 Browser Search Service.
#
# The Initial Developer of the Original Code is
# Google Inc.
# Portions created by the Initial Developer are Copyright (C) 2005
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Ben Goodger <beng@google.com> (Original author)
# Gavin Sharp <gavin@gavinsharp.com>
#
# 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 Cr = Components.results;
const PERMS_FILE = 0644;
const PERMS_DIRECTORY = 0755;
const MODE_RDONLY = 0x01;
const MODE_WRONLY = 0x02;
const MODE_CREATE = 0x08;
const MODE_APPEND = 0x10;
const MODE_TRUNCATE = 0x20;
// Directory service keys
const NS_APP_SEARCH_DIR_LIST = "SrchPluginsDL";
const NS_APP_USER_SEARCH_DIR = "UsrSrchPlugns";
// See documentation in nsIBrowserSearchService.idl.
const SEARCH_ENGINE_TOPIC = "browser-search-engine-modified";
const XPCOM_SHUTDOWN_TOPIC = "xpcom-shutdown";
const SEARCH_ENGINE_REMOVED = "engine-removed";
const SEARCH_ENGINE_ADDED = "engine-added";
const SEARCH_ENGINE_CHANGED = "engine-changed";
const SEARCH_ENGINE_LOADED = "engine-loaded";
const SEARCH_ENGINE_CURRENT = "engine-current";
const SEARCH_TYPE_MOZSEARCH = Ci.nsISearchEngine.TYPE_MOZSEARCH;
const SEARCH_TYPE_OPENSEARCH = Ci.nsISearchEngine.TYPE_OPENSEARCH;
const SEARCH_TYPE_SHERLOCK = Ci.nsISearchEngine.TYPE_SHERLOCK;
const SEARCH_DATA_XML = Ci.nsISearchEngine.DATA_XML;
const SEARCH_DATA_TEXT = Ci.nsISearchEngine.DATA_TEXT;
// File extensions for search plugin description files
const XML_FILE_EXT = "xml";
const SHERLOCK_FILE_EXT = "src";
const ICON_DATAURL_PREFIX = "data:image/x-icon;base64,";
// Supported extensions for Sherlock plugin icons
const SHERLOCK_ICON_EXTENSIONS = [".gif", ".png", ".jpg", ".jpeg"];
// Set an arbitrary cap on the maximum icon size. Without this, large icons can
// cause big delays when loading them at startup.
const MAX_ICON_SIZE = 10000;
// Default charset to use for sending search parameters. This is used to match
// previous nsInternetSearchService behavior.
const DEFAULT_QUERY_CHARSET = "ISO-8859-1";
const SEARCH_BUNDLE = "chrome://browser/locale/search.properties";
const BRAND_BUNDLE = "chrome://branding/locale/brand.properties";
const kOpenSearchNS_10 = "http://a9.com/-/spec/opensearchdescription/1.0/";
const kOpenSearchNS_11 = "http://a9.com/-/spec/opensearchdescription/1.1/";
const kOpenSearchLocalName = "OpenSearchDescription";
const kMozSearchNS_10 = "http://www.mozilla.org/2006/browser/search/";
const kMozSearchLocalName = "SearchPlugin";
// Empty base document used to serialize engines to file.
const EMPTY_DOC = "<?xml version=\"1.0\"?>\n" +
"<" + kMozSearchLocalName +
" xmlns=\"" + kMozSearchNS_10 + "\"" +
" xmlns:os=\"" + kOpenSearchNS_11 + "\"" +
"/>";
const BROWSER_SEARCH_PREF = "browser.search.";
// Unsupported search parameters.
// XXX We do use inputEncoding - should consider having it available. This
// would require doing multiple parameter substition, so just having
// searchTerms is sufficient for now.
const kIllegalWords = /(\{count\})|(\{startIndex\})|(\{startPage\})|(\{language\})|(\{outputEncoding\})|(\{inputEncoding\})/;
const kValidWords = /\{searchTerms\}/gi;
const kUserDefined = "{searchTerms}";
// Returns false for whitespace-only or commented out lines in a
// Sherlock file, true otherwise.
function isUsefulLine(aLine) {
return !(/^\s*($|#)/i.test(aLine));
}
/**
* Used to determine whether an "input" line from a Sherlock file is a "user
* defined" input. That is, check for the string "user", preceded by either
* whitespace or a quote, followed by any of ">", "=", """, "'", whitespace,
* a slash, "+", or EOL.
*/
const kIsUserInput = /(\s|["'=])user(\s|[>="'\/\\+]|$)/i;
/**
* Prefixed to all search debug output.
*/
const SEARCH_LOG_PREFIX = "*** Search: ";
/**
* Outputs aText to the JavaScript console as well as to stdout, if the search
* logging pref (browser.search.log) is set to true.
*/
function LOG(aText) {
var prefB = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefBranch);
var shouldLog = false;
try {
shouldLog = prefB.getBoolPref(BROWSER_SEARCH_PREF + "log");
} catch (ex) {}
if (shouldLog) {
dump(SEARCH_LOG_PREFIX + aText + "\n");
var consoleService = Cc["@mozilla.org/consoleservice;1"].
getService(Ci.nsIConsoleService);
consoleService.logStringMessage(aText);
}
}
function ERROR(message, resultCode) {
NS_ASSERT(false, SEARCH_LOG_PREFIX + message);
throw resultCode;
}
/**
* Ensures an assertion is met before continuing. Should be used to indicate
* fatal errors.
* @param assertion
* An assertion that must be met
* @param message
* A message to display if the assertion is not met
* @param resultCode
* The NS_ERROR_* value to throw if the assertion is not met
* @throws resultCode
*/
function ENSURE_WARN(assertion, message, resultCode) {
NS_ASSERT(assertion, SEARCH_LOG_PREFIX + message);
if (!assertion)
throw resultCode;
}
/**
* Ensures an assertion is met before continuing, but does not warn the user.
* Used to handle normal failure conditions.
* @param assertion
* An assertion that must be met
* @param message
* A message to display if the assertion is not met
* @param resultCode
* The NS_ERROR_* value to throw if the assertion is not met
* @throws resultCode
*/
function ENSURE(assertion, message, resultCode) {
if (!assertion) {
LOG(message);
throw resultCode;
}
}
/**
* Ensures an argument assertion is met before continuing.
* @param assertion
* An argument assertion that must be met
* @param message
* A message to display if the assertion is not met
* @throws NS_ERROR_INVALID_ARG for invalid arguments
*/
function ENSURE_ARG(assertion, message) {
ENSURE(assertion, message, Cr.NS_ERROR_INVALID_ARG);
}
//XXX Bug 326854: no btoa for components, use our own
/**
* Encodes an array of bytes into a string using the base 64 encoding scheme.
* @param aBytes
* An array of bytes to encode.
*/
function b64(aBytes) {
const B64_CHARS =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var out = "", bits, i, j;
while (aBytes.length >= 3) {
bits = 0;
for (i = 0; i < 3; i++) {
bits <<= 8;
bits |= aBytes[i];
}
for (j = 18; j >= 0; j -= 6)
out += B64_CHARS[(bits>>j) & 0x3F];
aBytes.splice(0, 3);
}
switch (aBytes.length) {
case 2:
out += B64_CHARS[(aBytes[0]>>2) & 0x3F];
out += B64_CHARS[((aBytes[0] & 0x03) << 4) | ((aBytes[1] >> 4) & 0x0F)];
out += B64_CHARS[((aBytes[1] & 0x0F) << 2)];
out += "=";
break;
case 1:
out += B64_CHARS[(aBytes[0]>>2) & 0x3F];
out += B64_CHARS[(aBytes[0] & 0x03) << 4];
out += "==";
break;
}
return out;
}
function iconLoadListener(aChannel, aEngine) {
this._countRead = 0;
this._channel = aChannel;
this._bytes = [],
this._engine = aEngine;
}
iconLoadListener.prototype = {
_channel: null,
_countRead: 0,
_engine: null,
_stream: null,
QueryInterface: function SRCH_iconLoad_QI(aIID) {
if (aIID.equals(Ci.nsISupports) ||
aIID.equals(Ci.nsIRequestObserver) ||
aIID.equals(Ci.nsIStreamListener) ||
aIID.equals(Ci.nsIChannelEventSink) ||
aIID.equals(Ci.nsIInterfaceRequestor) ||
// See XXX comment below
aIID.equals(Ci.nsIHttpEventSink) ||
aIID.equals(Ci.nsIProgressEventSink) ||
false)
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
},
// nsIRequestObserver
onStartRequest: function SRCH_iconLoadStartR(aRequest, aContext) {
LOG("iconLoadListener: Starting icon request.");
this._stream = Cc["@mozilla.org/binaryinputstream;1"].
createInstance(Ci.nsIBinaryInputStream);
},
onStopRequest: function SRCH_iconLoadStopR(aRequest, aContext, aStatusCode) {
LOG("iconLoadListener: Stopping icon request.");
var httpChannel = this._channel.QueryInterface(Ci.nsIHttpChannel);
if ((httpChannel && httpChannel.requestSucceeded) &&
Components.isSuccessCode(aStatusCode) &&
this._countRead > 0) {
if (this._countRead < MAX_ICON_SIZE) {
var str = b64(this._bytes);
this._engine._iconURI = makeURI(ICON_DATAURL_PREFIX + str);
// The engine might not have a file yet, if it's being downloaded,
// because the request for the engine file itself (_onLoad) may not yet
// have occured. In that case, this change will be written to file when
// _onLoad is called.
if (this._engine._file)
this._engine._serializeToFile();
notifyAction(this._engine, SEARCH_ENGINE_CHANGED);
}
}
this._channel = null;
this._engine = null;
},
// nsIStreamListener
onDataAvailable: function SRCH_iconLoadDAvailable(aRequest, aContext,
aInputStream, aOffset,
aCount) {
this._stream.setInputStream(aInputStream);
// Get a byte array of the data
this._bytes = this._bytes.concat(this._stream.readByteArray(aCount));
this._countRead += aCount;
},
// nsIChannelEventSink
onChannelRedirect: function SRCH_iconLoadCRedirect(aOldChannel, aNewChannel,
aFlags) {
this._channel = aNewChannel;
},
// nsIInterfaceRequestor
getInterface: function SRCH_iconLoad_GI(aIID) {
return this.QueryInterface(aIID);
},
// XXX bug 253127
// nsIHttpEventSink
onRedirect: function (aChannel, aNewChannel) {},
// nsIProgressEventSink
onProgress: function (aRequest, aContext, aProgress, aProgressMax) {},
onStatus: function (aRequest, aContext, aStatus, aStatusArg) {}
}
/**
* Used to verify a given DOM node's localName and namespaceURI.
* @param aElement
* The element to verify.
* @param aLocalNameArray
* An array of strings to compare against aElement's localName.
* @param aNameSpaceArray
* An array of strings to compare against aElement's namespaceURI.
*
* @returns false if aElement is null, or if its localName or namespaceURI
* does not match one of the elements in the aLocalNameArray or
* aNameSpaceArray arrays, respectively.
* @throws NS_ERROR_INVALID_ARG if aLocalNameArray or aNameSpaceArray are null.
*/
function checkNameSpace(aElement, aLocalNameArray, aNameSpaceArray) {
ENSURE_ARG(aLocalNameArray && aNameSpaceArray, "missing aLocalNameArray or \
aNameSpaceArray for checkNameSpace");
return (aElement &&
(aLocalNameArray.indexOf(aElement.localName) != -1) &&
(aNameSpaceArray.indexOf(aElement.namespaceURI) != -1));
}
/**
* Safely close a nsISafeOutputStream.
* @param aFOS
* The file output stream to close.
*/
function closeSafeOutputStream(aFOS) {
if (aFOS instanceof Ci.nsISafeOutputStream) {
try {
aFOS.finish();
return;
} catch (e) { }
}
aFOS.close();
}
/**
* Wrapper function for nsIIOService::newURI.
* @param aURLSpec
* The URL string from which to create an nsIURI.
* @returns an nsIURI object, or null if the creation of the URI failed.
*/
function makeURI(aURLSpec) {
var ios = Cc["@mozilla.org/network/io-service;1"].
getService(Ci.nsIIOService);
try {
return ios.newURI(aURLSpec, null, null);
} catch (ex) { }
return null;
}
/**
* Gets a directory from the directory service.
* @param aKey
* The directory service key indicating the directory to get.
*/
function getDir(aKey) {
ENSURE_ARG(aKey, "getDir requires a directory key!");
var fileLocator = Cc["@mozilla.org/file/directory_service;1"].
getService(Ci.nsIProperties);
var dir = fileLocator.get(aKey, Ci.nsIFile);
return dir;
}
// This isn't a full list - this is just copied over from
// nsInternetSearchService to maintain backwards compat with Firefox 1.0.x
const kCharsetCodes = [];
kCharsetCodes[0] = "x-mac-roman";
kCharsetCodes[6] = "x-mac-greek";
kCharsetCodes[35] = "x-mac-turkish";
kCharsetCodes[513] = "ISO-8859-1";
kCharsetCodes[514] = "ISO-8859-2";
kCharsetCodes[517] = "ISO-8859-5";
kCharsetCodes[518] = "ISO-8859-6";
kCharsetCodes[519] = "ISO-8859-7";
kCharsetCodes[520] = "ISO-8859-8";
kCharsetCodes[521] = "ISO-8859-9";
kCharsetCodes[1049] = "IBM864";
kCharsetCodes[1280] = "windows-1252";
kCharsetCodes[1281] = "windows-1250";
kCharsetCodes[1282] = "windows-1251";
kCharsetCodes[1283] = "windows-1253";
kCharsetCodes[1284] = "windows-1254";
kCharsetCodes[1285] = "windows-1255";
kCharsetCodes[1286] = "windows-1256";
kCharsetCodes[1536] = "us-ascii";
kCharsetCodes[1584] = "GB2312";
kCharsetCodes[1585] = "x-gbk";
kCharsetCodes[1600] = "EUC-KR";
kCharsetCodes[2080] = "ISO-2022-JP";
kCharsetCodes[2096] = "ISO-2022-CN";
kCharsetCodes[2112] = "ISO-2022-KR";
kCharsetCodes[2336] = "EUC-JP";
kCharsetCodes[2352] = "GB2312";
kCharsetCodes[2353] = "x-euc-tw";
kCharsetCodes[2368] = "EUC-KR";
kCharsetCodes[2561] = "Shift_JIS";
kCharsetCodes[2562] = "KOI8-R";
kCharsetCodes[2563] = "Big5";
kCharsetCodes[2565] = "HZ-GB-2312";
/**
* Gets a character set name from a given code.
* @param aCode
* One of the codes from the kCharsetCodes table, representing the
* requested charset.
* @returns the requested character set name, or the default character set name
* if it doesn't exist.
*/
function getCharSetFromCode(aCode) {
if (kCharsetCodes[aCode])
return kCharsetCodes[aCode];
return getLocalizedPref("intl.charset.default", DEFAULT_QUERY_CHARSET);
}
/**
* Wrapper for nsIPrefBranch::getComplexValue.
* @param aPrefName
* The name of the pref to get.
* @returns aDefault if the requested pref doesn't exist.
*/
function getLocalizedPref(aPrefName, aDefault) {
var prefB = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefBranch);
const nsIPLS = Ci.nsIPrefLocalizedString;
try {
return prefB.getComplexValue(aPrefName, nsIPLS).data;
} catch (ex) {}
return aDefault;
}
/**
* Wrapper for nsIPrefBranch::setComplexValue.
* @param aPrefName
* The name of the pref to set.
* @param aValue
* The value of the pref.
*/
function setLocalizedPref(aPrefName, aValue) {
var prefB = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefBranch);
var pls = Cc["@mozilla.org/pref-localizedstring;1"].
createInstance(Ci.nsIPrefLocalizedString);
pls.data = aValue;
prefB.setComplexValue(aPrefName, Ci.nsIPrefLocalizedString, pls);
}
/**
* Wrapper for nsIPrefBranch::setBoolPref.
* @param aPrefName
* The name of the pref to set.
* @param aValue
* The value of the pref.
*/
function setBoolPref(aName, aVal) {
var prefB = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefBranch);
prefB.setBoolPref(aName, aVal);
}
/**
* Wrapper for nsIPrefBranch::getBoolPref.
* @param aPrefName
* The name of the pref to get.
* @returns aDefault if the requested pref doesn't exist.
*/
function getBoolPref(aName, aDefault) {
var prefB = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefBranch);
try {
return prefB.getBoolPref(aName);
} catch (ex) {
return aDefault;
}
}
/**
* Get a unique nsIFile object with a sanitized name, based on the engine name.
* @param aName
* A name to "sanitize". Can be an empty string, in which case a random
* 8 character filename will be produced.
* @param aExt
* A file extension to use for the file. If not provided, defaults to
* XML_FILE_EXT.
* @returns A nsIFile object in the user's search engines directory with a
* unique sanitized name.
*/
function getSanitizedFile(aName) {
var fileName = sanitizeName(aName) + "." + XML_FILE_EXT;
var file = getDir(NS_APP_USER_SEARCH_DIR);
file.append(fileName);
file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, PERMS_FILE);
return file;
}
/**
* Removes all characters not in the "chars" string from aName.
*
* @returns a sanitized name to be used as a filename, or a random name if a
* sanitized name cannot be obtained (if aName contains no valid
* characters).
*/
function sanitizeName(aName) {
const chars = "abcdefghijklmnopqrstuvwxyz0123456789";
var name = aName.toLowerCase()
.split("").filter(function (el) {
return chars.indexOf(el) != -1;
}).join("");
if (!name) {
// Our input had no valid characters - use a random name
var cl = chars.length;
for (var i = 0; i < 8; ++i)
name += chars.charAt(Math.round(Math.random() * cl));
}
return name;
}
/**
* Notifies watchers of SEARCH_ENGINE_TOPIC about changes to an engine or to
* the state of the search service.
*
* @param aEngine
* The nsISearchEngine object to which the change applies.
* @param aVerb
* A verb describing the change.
*
* @see nsIBrowserSearchService.idl
*/
function notifyAction(aEngine, aVerb) {
var os = Cc["@mozilla.org/observer-service;1"].
getService(Ci.nsIObserverService);
LOG("NOTIFY: Engine: \"" + aEngine.name + "\"; Verb: \"" + aVerb + "\"");
os.notifyObservers(aEngine, SEARCH_ENGINE_TOPIC, aVerb);
}
/**
* Simple object representing a name/value pair.
* @throws NS_ERROR_NOT_IMPLEMENTED if the provided value includes unsupported
* parameters.
* @see kIllegalWords.
*/
function QueryParameter(aName, aValue) {
ENSURE_ARG(aName && aValue, "missing name or value for QueryParameter!");
ENSURE(!kIllegalWords.test(aValue),
"Illegal value while creating a QueryParameter",
Cr.NS_ERROR_NOT_IMPLEMENTED);
this.name = aName;
this.value = aValue;
}
/**
* Creates an engineURL object, which holds the query URL and all parameters.
*
* @param aType
* A string containing the name of the MIME type of the search results
* returned by this URL.
* @param aMethod
* The HTTP request method. Must be a case insensitive value of either
* "GET" or "POST".
* @param aTemplate
* The URL to which search queries should be sent. For GET requests,
* must contain the string "{searchTerms}", to indicate where the user
* entered search terms should be inserted.
*
* @see http://opensearch.a9.com/spec/1.1/querysyntax/#urltag
*
* @throws NS_ERROR_NOT_IMPLEMENTED if aType is unsupported, or if aTemplate
* includes unsupported parameters.
*
* @see kIllegalWords.
*/
function EngineURL(aType, aMethod, aTemplate) {
ENSURE_ARG(aType && aMethod && aTemplate,
"missing type, method or template for EngineURL!");
var method = aMethod.toUpperCase();
var type = aType.toLowerCase();
ENSURE_ARG(method == "GET" || method == "POST",
"method passed to EngineURL must be \"GET\" or \"POST\"");
ENSURE(type == "text/html", "EngineURLs must be of type text/html!",
Cr.NS_ERROR_NOT_IMPLEMENTED);
ENSURE(!kIllegalWords.test(aTemplate), "Invalid URL parameter!",
Cr.NS_ERROR_NOT_IMPLEMENTED);
this.type = type;
this.method = method;
this.template = aTemplate;
this.params = [];
}
EngineURL.prototype = {
addParam: function SRCH_EURL_addParam(aName, aValue) {
this.params.push(new QueryParameter(aName, aValue));
},
getSubmission: function SRCH_EURL_getSubmission(aData) {
/**
* From an array of QueryParameter objects, generates a string in the
* application/x-www-form-urlencoded format:
* name=value&name=value&name=value...
* @param aParams
* An array of QueryParameter objects
* @param aData
* Data to be substituted into parameter values using the
* |kValidWords| regexp
* @returns A string of encoded param names and values in
* application/x-www-form-urlencoded format.
*/
function makeQueryString(aParams, aData) {
var str = "";
for (var i = 0; i < aParams.length; ++i) {
var param = aParams[i];
var value = param.value.replace(kValidWords, aData);
str += (i > 0 ? "&" : "") + param.name + "=" + value;
}
return str;
}
var url = this.template.replace(kValidWords, aData);
var postData = null;
var dataString = makeQueryString(this.params, aData);
if (this.method == "GET") {
// GET method requests have no post data, and append the encoded
// text to the url...
if (url.indexOf("?") == -1 && dataString)
url += "?";
url += dataString;
} else if (this.method == "POST") {
// POST method requests must wrap the encoded text in a MIME
// stream and supply that as POSTDATA.
var stringStream = Cc["@mozilla.org/io/string-input-stream;1"].
createInstance(Ci.nsIStringInputStream);
#ifdef MOZILLA_1_8_BRANCH
# bug 318193
stringStream.setData(dataString, dataString.length);
#else
stringStream.data = dataString;
#endif
postData = Cc["@mozilla.org/network/mime-input-stream;1"].
createInstance(Ci.nsIMIMEInputStream);
postData.addHeader("Content-Type", "application/x-www-form-urlencoded");
postData.addContentLength = true;
postData.setData(stringStream);
}
return new Submission(makeURI(url), postData);
},
/**
* Serializes the engine object to a OpenSearch Url element.
* @param aDoc
* The document to use to create the Url element.
* @param aElement
* The element to which the created Url element is appended.
*
* @see http://opensearch.a9.com/spec/1.1/querysyntax/#urltag
*/
_serializeToElement: function SRCH_EURL_serializeToEl(aDoc, aElement) {
var url = aDoc.createElementNS(kOpenSearchNS_11, "Url");
url.setAttribute("type", this.type);
url.setAttribute("method", this.method);
url.setAttribute("template", this.template);
for (var i = 0; i < this.params.length; ++i) {
var param = aDoc.createElementNS(kOpenSearchNS_11, "Param");
param.setAttribute("name", this.params[i].name);
param.setAttribute("value", this.params[i].value);
url.appendChild(aDoc.createTextNode("\n "));
url.appendChild(param);
}
url.appendChild(aDoc.createTextNode("\n"));
aElement.appendChild(url);
}
};
/**
* nsISearchEngine constructor.
* @param aLocation
* A nsILocalFile or nsIURI object representing the location of the
* search engine data file.
* @param aSourceDataType
* The data type of the file used to describe the engine. Must be either
* DATA_XML or DATA_TEXT.
* @param aIsReadOnly
* Boolean indicating whether the engine should be treated as read-only.
* Read only engines cannot be serialized to file.
*/
function Engine(aLocation, aSourceDataType, aIsReadOnly) {
this._dataType = aSourceDataType;
this._readOnly = aIsReadOnly;
this._urls = [];
if (aLocation instanceof Ci.nsILocalFile) {
// we already have a file (e.g. loading engines from disk)
this._file = aLocation;
} else if (aLocation instanceof Ci.nsIURI) {
this._uri = aLocation;
switch (aLocation.scheme) {
case "https":
case "http":
case "data":
case "file":
case "resource":
this._uri = aLocation;
break;
default:
ERROR("Invalid URI passed to the nsISearchEngine constructor",
Cr.NS_ERROR_INVALID_ARG);
}
} else
ERROR("Engine location is neither a File nor a URI object",
Cr.NS_ERROR_INVALID_ARG);
}
Engine.prototype = {
// The engine's alias.
_alias: null,
// The data describing the engine. Is either an array of lines, for Sherlock
// files, or an XML document element, for XML plugins.
_data: null,
// The engine's data type. See data types (DATA_) defined above.
_dataType: null,
// Whether or not the engine is readonly.
_readOnly: true,
// The engine's description
_description: "",
// The file from which the plugin was loaded.
_file: null,
// Whether the engine is hidden from the user.
_hidden: null,
// The XMLHTTPRequest object used to download the engine.
// (null for engines loaded from disk)
_req: null,
// The engine's name.
_name: null,
// The engine type. See engine types (TYPE_) defined above.
_type: null,
// The name of the charset used to submit the search terms.
_queryCharset: null,
// The URI object from which the engine was retrieved.
// This is null for local plugins, and is only used for error messages and
// logging.
_uri: null,
/**
* Retrieves the data from the engine's file. If the engine's dataType is
* XML, the document element is placed in the engine's data field. For text
* engines, the data is just read directly from file and placed as an array
* of lines in the engine's data field.
*/
_initFromFile: function SRCH_ENG_initFromFile() {
ENSURE(this._file && this._file.exists(),
"File must exist before calling initFromFile!",
Cr.NS_ERROR_UNEXPECTED);
var fileInStream = Cc["@mozilla.org/network/file-input-stream;1"].
createInstance(Ci.nsIFileInputStream);
fileInStream.init(this._file, MODE_RDONLY, PERMS_FILE, false);
switch (this._dataType) {
case SEARCH_DATA_XML:
var domParser = Cc["@mozilla.org/xmlextras/domparser;1"].
createInstance(Ci.nsIDOMParser);
var doc = domParser.parseFromStream(fileInStream, "UTF-8",
this._file.fileSize,
"text/xml");
this._data = doc.documentElement;
break;
case SEARCH_DATA_TEXT:
fileInStream.QueryInterface(Ci.nsILineInputStream);
var line = { value: "" };
var more = false;
var lines = [];
do {
more = fileInStream.readLine(line);
// Filter out comments and whitespace-only lines
if (isUsefulLine(line.value))
lines.push(line.value);
} while (more);
this._data = lines;
break;
default:
ERROR("Bogus engine _dataType: \"" + this._dataType + "\"",
Cr.NS_ERROR_UNEXPECTED);
}
fileInStream.close();
// Now that the data is loaded, initialize the engine object
this._initFromData();
},
/**
* Retrieves the engine data from a URI.
* @param aURI
* The URL to transfer from.
*/
_initFromURI: function SRCH_ENG_initFromURI() {
ENSURE_WARN(this._uri instanceof Ci.nsIURI,
"Must have URI when calling _initFromURI!",
Cr.NS_ERROR_UNEXPECTED);
LOG("_initFromURI: Downloading engine from: \"" + this._uri.spec + "\".");
var mimeType = "";
switch (this._dataType) {
case SEARCH_DATA_XML:
mimeType = "text/xml";
break;
case SEARCH_DATA_TEXT:
mimeType = "text/plain";
break;
default:
ERROR("Bogus engine _dataType: \"" + this._dataType + "\"",
Cr.NS_ERROR_UNEXPECTED);
}
this._req = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].
createInstance(Ci.nsIXMLHttpRequest);
this._req.open("GET", this._uri.spec, true);
this._req.overrideMimeType(mimeType);
this._req.setRequestHeader("Cache-Control", "no-cache");
var self = this;
this._req.send(null);
this._req.onerror = function (event) { self._onError(event); };
this._req.onload = function (event) { self._onLoad(event); };
},
/**
* Handle an error during the load of an engine by prompting the user to
* notify him that the load failed.
*/
_onError: function SRCH_ENG_onError(aEvent) {
var sbs = Cc["@mozilla.org/intl/stringbundle;1"].
getService(Ci.nsIStringBundleService);
var searchBundle = sbs.createBundle(SEARCH_BUNDLE);
var brandBundle = sbs.createBundle(BRAND_BUNDLE);
var brandName = brandBundle.GetStringFromName("brandShortName");
var title = searchBundle.GetStringFromName("error_loading_engine_title");
var text = searchBundle.formatStringFromName("error_loading_engine_msg",
[brandName, this._location],
2);
var ww = Cc["@mozilla.org/embedcomp/window-watcher;1"].
getService(Ci.nsIWindowWatcher);
ww.getNewPrompter(null).alert(title, text);
},
/**
* Handle the successful download of an engine. Initializes the engine and
* triggers parsing of the data. The engine is then flushed to disk. Notifies
* the search service once initialization is complete.
*/
_onLoad: function SRCH_ENG_onLoad(aEvent) {
var httpChannel = this._req.channel.QueryInterface(Ci.nsIHttpChannel);
if (this._req.readyState != 4 || !httpChannel.requestSucceeded) {
this._onError();
LOG("_onLoad: Request for " + this._location + " failed!");
return;
}
switch (this._dataType) {
case SEARCH_DATA_XML:
this._data = this._req.responseXML.documentElement;
break;
case SEARCH_DATA_TEXT:
this._data = this._req.responseText.split(/(\r\n|\n\r|\r|\n)/);
// Filter out comments and whitespace-only lines.
this._data.filter(isUsefulLine);
break;
default:
this._onError();
LOG("_onLoad: Bogus engine _dataType: \"" + this._dataType + "\"");
return;
}
try {
// Initialize the engine from the obtained data
this._initFromData();
} catch (ex) {
// Report an error to the user
LOG("_onLoad: Failed to init engine!\n" + ex);
this._onError();
return;
}
// Write the engine to file
this._serializeToFile();
// Notify the search service of the sucessful load
notifyAction(this, SEARCH_ENGINE_LOADED);
},
/**
* Sets the .iconURI property of the engine.
*
* @param aIconURL
* A URI string pointing to the engine's icon. Must have a http[s] or
* data scheme. Icons with HTTP[S] schemes will be downloaded and
* converted to data URIs for storage in the engine XML files, if
* the engine is not readonly.
*/
_setIcon: function SRCH_ENG_setIcon(aIconURL) {
var uri = makeURI(aIconURL);
// Ignore bad URIs
if (!uri)
return;
LOG("_setIcon: Setting icon url \"" + uri.spec + "\" for engine \""
+ this.name + "\".");
// Only accept remote icons from http[s]
switch (uri.scheme) {
case "data":
this._iconURI = uri;
break;
case "http":
case "https":
// No use downloading the icon if the engine file is read-only
// XXX could store the data: URI in a pref... ew?
if (!this._readOnly) {
LOG("_setIcon: Downloading icon: \"" + uri.spec +
"\" for engine: \"" + this.name + "\"");
var ios = Cc["@mozilla.org/network/io-service;1"].
getService(Ci.nsIIOService);
var chan = ios.newChannelFromURI(uri);
var listener = new iconLoadListener(chan, this);
chan.notificationCallbacks = listener;
chan.asyncOpen(listener, null);
}
break;
}
},
/**
* Initialize this Engine object from the collected data.
*/
_initFromData: function SRCH_ENG_initFromData() {
ENSURE_WARN(this._data, "Can't init an engine with no data!",
Cr.NS_ERROR_UNEXPECTED);
// Find out what type of engine we are
switch (this._dataType) {
case SEARCH_DATA_XML:
if (checkNameSpace(this._data, [kMozSearchLocalName],
[kMozSearchNS_10])) {
LOG("_init: Initing MozSearch plugin from " + this._location);
this._type = SEARCH_TYPE_MOZSEARCH;
this._parseAsMozSearch();
} else if (checkNameSpace(this._data, [kOpenSearchLocalName],
[kOpenSearchNS_11, kOpenSearchNS_10])) {
LOG("_init: Initing OpenSearch plugin from " + this._location);
this._type = SEARCH_TYPE_OPENSEARCH;
this._parseAsOpenSearch();
} else
ENSURE(false, this._location + " is not a valid search plugin.",
Cr.NS_ERROR_FAILURE);
break;
case SEARCH_DATA_TEXT:
LOG("_init: Initing Sherlock plugin from " + this._location);
// the only text-based format we support is Sherlock
this._type = SEARCH_TYPE_SHERLOCK;
this._parseAsSherlock();
}
// If we don't yet have a file (i.e. we instantiated an engine object from
// passed in URL), get one now
if (!this._file)
this._file = getSanitizedFile(this.name);
// Generate a unique ID for this engine. Use the name of the engine, URI
// encoded because pref names can only contain certain characters
this._pref = BROWSER_SEARCH_PREF + "engine." +
encodeURIComponent(this.name) + ".";
},
/**
* Initialize this Engine object from a collection of metadata.
*/
_initFromMetadata: function SRCH_ENG_initMetaData(aName, aIconURL, aAlias,
aDescription, aMethod,
aTemplate) {
ENSURE_WARN(!this._readOnly,
"Can't call _initFromMetaData on a readonly engine!",
Cr.NS_ERROR_FAILURE);
this._name = aName;
this._alias = aAlias;
this._description = aDescription;
this._setIcon(aIconURL);
this._urls.push(new EngineURL("text/html", aMethod, aTemplate));
this._serializeToFile();
},
/**
* Extracts data from an OpenSearch URL element and creates an EngineURL
* object which is then added to the engine's list of URLs.
*
* @see http://opensearch.a9.com/spec/1.1/querysyntax/#urltag.
* @see EngineURL()
*/
_parseURL: function SRCH_ENG_parseURL(aElement) {
var type = aElement.getAttribute("type");
var method = aElement.getAttribute("method");
var template = aElement.getAttribute("template");
var url = new EngineURL(type, method, template);
for (var i = 0; i < aElement.childNodes.length; ++i) {
var param = aElement.childNodes[i];
if (param.localName == "Param")
url.addParam(param.getAttribute("name"), param.getAttribute("value"));
}
this._urls.push(url);
},
/**
* Get the icon from an OpenSearch Image element.
* @see http://opensearch.a9.com/spec/1.1/description/#image
*/
_parseImage: function SRCH_ENG_parseImage(aElement) {
LOG("_parseImage: Image textContent: \"" + aElement.textContent + "\"");
if (aElement.getAttribute("width") == "16" &&
aElement.getAttribute("height") == "16") {
this._setIcon(aElement.textContent);
}
},
_parseAsMozSearch: function SRCH_ENG_parseAsMoz() {
//XXX for now, just forward to the OpenSearch parser
this._parseAsOpenSearch();
},
/**
* Extract search engine information from the collected data to initialize
* the engine object.
*/
_parseAsOpenSearch: function SRCH_ENG_parseAsOS() {
var doc = this._data;
for (var i = 0; i < doc.childNodes.length; ++i) {
var child = doc.childNodes[i];
switch (child.localName) {
case "ShortName":
this._name = child.textContent;
break;
case "Description":
this._description = child.textContent;
break;
case "Url":
this._parseURL(child);
break;
case "Image":
this._parseImage(child);
break;
case "Alias":
this._alias = child.textContent;
break;
case "InputEncoding":
this._queryCharset = child.textContent.toUpperCase();
break;
}
}
ENSURE(this.name && (this._urls.length > 0),
"_parseAsOpenSearch: No name, or missing URL!",
Cr.NS_ERROR_FAILURE);
},
/**
* Extract search engine information from the collected data to initialize
* the engine object.
*/
_parseAsSherlock: function SRCH_ENG_parseAsSherlock() {
/**
* Trims leading and trailing whitespace from aStr.
*/
function sTrim(aStr) {
return aStr.replace(/^\s+/g, "").replace(/\s+$/g, "");
}
/**
* Extracts one Sherlock "section" from aSource. A section is essentially
* an HTML element with attributes, but each attribute must be on a new
* line, by definition.
*
* @param aLines
* An array of lines from the sherlock file.
* @param aSection
* The name of the section (e.g. "search" or "browser"). This value
* is not case sensitive.
* @returns an object whose properties correspond to the section's
* attributes.
*/
function getSection(aLines, aSection) {
LOG("_parseAsSherlock::getSection: Sherlock lines:\n" +
aLines.join("\n"));
var lines = aLines;
var startMark = new RegExp("^\\s*<" + aSection.toLowerCase() + "\\s*",
"gi");
var endMark = /\s*>\s*$/gi;
var foundStart = false;
var startLine, numberOfLines;
// Find the beginning and end of the section
for (var i = 0; i < lines.length; i++) {
if (foundStart) {
if (endMark.test(lines[i])) {
numberOfLines = i - startLine;
// Remove the end marker
lines[i] = lines[i].replace(endMark, "");
// If the endmarker was not the only thing on the line, include
// this line in the results
if (lines[i])
numberOfLines++;
break;
}
} else {
if (startMark.test(lines[i])) {
foundStart = true;
// Remove the start marker
lines[i] = lines[i].replace(startMark, "");
startLine = i;
// If the line is empty, don't include it in the result
if (!lines[i])
startLine++;
}
}
}
LOG("_parseAsSherlock::getSection: Start index: " + startLine +
"\nNumber of lines: " + numberOfLines);
lines = lines.splice(startLine, numberOfLines);
LOG("_parseAsSherlock::getSection: Section lines:\n" +
lines.join("\n"));
var section = {};
for (var i = 0; i < lines.length; i++) {
var line = sTrim(lines[i]);
var els = line.split("=");
var name = sTrim(els.shift().toLowerCase());
var value = sTrim(els.join("="));
if (!name || !value)
continue;
// Strip leading and trailing whitespace, remove quotes from the
// value, and remove any trailing slashes or ">" characters
value = value.replace(/^["']/, "")
.replace(/["']\s*[\\\/]?>?\s*$/, "") || "";
value = sTrim(value);
// Don't clobber existing attributes
if (!(name in section))
section[name] = value;
}
return section;
}
/**
* Returns an array of name-value pair arrays representing the Sherlock
* file's input elements. User defined inputs return kUserDefined as the
* value. Elements are returned in the order they appear in the source
* file.
*
* Example:
* <input name="foo" value="bar">
* <input name="foopy" user>
* Returns:
* [["foo", "bar"], ["foopy", "{searchTerms}"]]
*
* @param aLines
* An array of lines from the source file.
*/
function getInputs(aLines) {
/**
* Extracts an attribute value from a given a line of text.
* Example: <input value="foo" name="bar">
* Extracts the string |foo| or |bar| given an input aAttr of
* |value| or |name|.
* Attributes may be quoted or unquoted. If unquoted, any whitespace
* indicates the end of the attribute value.
* Example: < value=22 33 name=44\334 >
* Returns |22| for "value" and |44\334| for "name".
*
* @param aAttr
* The name of the attribute for which to obtain the value. This
* value is not case sensitive.
* @param aLine
* The line containing the attribute.
*
* @returns the attribute value, or an empty string if the attribute
* doesn't exist.
*/
function getAttr(aAttr, aLine) {
LOG("_parseAsSherlock::getAttr: Getting attr: \"" +
aAttr + "\" for line: \"" + aLine + "\"");
// We're not case sensitive, but we want to return the attribute value
// in its original case, so create a copy of the source
var lLine = aLine.toLowerCase();
var attr = aAttr.toLowerCase();
var attrStart = lLine.search(new RegExp("\\s" + attr, "i"));
if (attrStart == -1) {
// If this is the "user defined input" (i.e. contains the empty
// "user" attribute), return our special keyword
if (kIsUserInput.test(lLine) && attr == "value") {
LOG("_parseAsSherlock::getAttr: Found user input!\nLine:\"" + lLine
+ "\"");
return kUserDefined;
}
// The attribute doesn't exist - ignore
LOG("_parseAsSherlock::getAttr: Failed to find attribute:\nLine:\""
+ lLine + "\"\nAttr:\"" + attr + "\"");
return "";
}
var valueStart = lLine.indexOf("=", attrStart) + "=".length;
if (valueStart == -1)
return "";
var quoteStart = lLine.indexOf("\"", valueStart);
if (quoteStart == -1) {
// Unquoted attribute, get the rest of the line, trimmed at the first
// sign of whitespace. If the rest of the line is only whitespace,
// returns a blank string.
return lLine.substr(valueStart).replace(/\s.*$/, "");
} else {
// Make sure that there's only whitespace between the start of the
// value and the first quote. If there is, end the attribute value at
// the first sign of whitespace. This prevents us from falling into
// the next attribute if this is an unquoted attribute followed by a
// quoted attribute.
var betweenEqualAndQuote = lLine.substring(valueStart, quoteStart);
if (/\S/.test(betweenEqualAndQuote))
return lLine.substr(valueStart).replace(/\s.*$/, "");
// Adjust the start index to account for the opening quote
valueStart = quoteStart + "\"".length;
// Find the closing quote
valueEnd = lLine.indexOf("\"", valueStart);
// If there is no closing quote, just go to the end of the line
if (valueEnd == -1)
valueEnd = aLine.length;
}
return aLine.substring(valueStart, valueEnd);
}
var inputs = [];
LOG("_parseAsSherlock::getInputs: Lines:\n" + aLines);
// Filter out everything but non-inputs
lines = aLines.filter(function (line) {
return /^\s*<input/i.test(line);
});
LOG("_parseAsSherlock::getInputs: Filtered lines:\n" + lines);
lines.forEach(function (line) {
// Strip leading/trailing whitespace and remove the surrounding markup
// ("<input" and ">")
line = sTrim(line).replace(/^<input/i, "").replace(/>$/, "");
// If this is one of the "directional" inputs (<inputnext>/<inputprev>)
const directionalInput = /^(prev|next)/i;
if (directionalInput.test(line)) {
// Make it look like a normal input by removing "prev" or "next"
line = line.replace(directionalInput, "");
// If it has a name, give it a dummy value to match previous
// nsInternetSearchService behavior
if (/name\s*=/i.test(line)) {
line += " value=\"0\"";
} else
return; // Line has no name, skip it
}
var attrName = getAttr("name", line);
var attrValue = getAttr("value", line);
LOG("_parseAsSherlock::getInputs: Got input:\nName:\"" + attrName +
"\"\nValue:\"" + attrValue + "\"");
if (attrValue)
inputs.push([attrName, attrValue]);
});
return inputs;
}
function err(aErr) {
LOG("_parseAsSherlock::err: Sherlock param error:\n" + aErr);
throw Cr.NS_ERROR_FAILURE;
}
var searchSection = getSection(this._data, "search");
LOG("_parseAsSherlock: Search section:\n" + searchSection.toSource());
this._name = searchSection["name"] || err("Missing name!");
this._description = searchSection["description"] || "";
this._queryCharset = searchSection["querycharset"] ||
getCharSetFromCode(searchSection["queryencoding"]);
// XXX should this really fall back to GET?
var method = (searchSection["method"] || "GET").toUpperCase();
var template = searchSection["action"] || err("Missing action!");
var inputs = getInputs(this._data);
LOG("_parseAsSherlock: Inputs:\n" + inputs.toSource());
var url = null;
if (method == "GET") {
// Here's how we construct the input string:
// <input> is first: Name Attr: Prefix Data Example:
// YES EMPTY None <value> TEMPLATE<value>
// YES NON-EMPTY ? <name>=<value> TEMPLATE?<name>=<value>
// NO EMPTY ------------- <ignored> --------------
// NO NON-EMPTY & <name>=<value> TEMPLATE?<n1>=<v1>&<n2>=<v2>
for (var i = 0; i < inputs.length; i++) {
var name = inputs[i][0];
var value = inputs[i][1];
if (i==0) {
if (name == "")
template += kUserDefined;
else
template += "?" + name + "=" + value;
} else if (name != "")
template += "&" + name + "=" + value;
}
url = new EngineURL("text/html", method, template);
} else if (method == "POST") {
// Create the URL object and just add the parameters directly
url = new EngineURL("text/html", method, template);
for (var i = 0; i < inputs.length; i++) {
var name = inputs[i][0];
var value = inputs[i][1];
if (name)
url.addParam(name, value);
}
} else
err("Invalid method!");
this._urls.push(url);
},
/**
* Returns an XML document object containing the search plugin information,
* which can later be used to reload the engine.
*/
_serializeToElement: function SRCH_ENG_serializeToEl() {
var parser = Cc["@mozilla.org/xmlextras/domparser;1"].
createInstance(Ci.nsIDOMParser);
var doc = parser.parseFromString(EMPTY_DOC, "text/xml");
docElem = doc.documentElement;
docElem.appendChild(doc.createTextNode("\n"));
var shortName = doc.createElementNS(kOpenSearchNS_11, "ShortName");
shortName.appendChild(doc.createTextNode(this.name));
docElem.appendChild(shortName);
docElem.appendChild(doc.createTextNode("\n"));
var description = doc.createElementNS(kOpenSearchNS_11, "Description");
description.appendChild(doc.createTextNode(this._description));
docElem.appendChild(description);
docElem.appendChild(doc.createTextNode("\n"));
var inputEncoding = doc.createElementNS(kOpenSearchNS_11, "InputEncoding");
inputEncoding.appendChild(doc.createTextNode(this._queryCharset));
docElem.appendChild(inputEncoding);
docElem.appendChild(doc.createTextNode("\n"));
if (this._iconURI) {
var image = doc.createElementNS(kOpenSearchNS_11, "Image");
image.appendChild(doc.createTextNode(this._iconURL));
image.setAttribute("width", "16");
image.setAttribute("height", "16");
docElem.appendChild(image);
docElem.appendChild(doc.createTextNode("\n"));
}
if (this._alias) {
var alias = doc.createElementNS(kMozSearchNS_10, "Alias");
alias.appendChild(doc.createTextNode(this.alias));
docElem.appendChild(alias);
docElem.appendChild(doc.createTextNode("\n"));
}
for (var i = 0; i < this._urls.length; ++i)
this._urls[i]._serializeToElement(doc, docElem);
docElem.appendChild(doc.createTextNode("\n"));
return doc;
},
/**
* Serializes the engine object to file.
*/
_serializeToFile: function SRCH_ENG_serializeToFile() {
var file = this._file;
ENSURE_WARN(!this._readOnly, "Can't serialize a read only engine!",
Cr.NS_ERROR_FAILURE);
ENSURE_WARN(file.exists(), "Can't serialize: file doesn't exist!",
Cr.NS_ERROR_UNEXPECTED);
var fos = Cc["@mozilla.org/network/safe-file-output-stream;1"].
createInstance(Ci.nsIFileOutputStream);
// Serialize the engine first - we don't want to overwrite a good file
// if this somehow fails.
doc = this._serializeToElement();
fos.init(file, (MODE_WRONLY | MODE_TRUNCATE), PERMS_FILE, 0);
try {
var serializer = Cc["@mozilla.org/xmlextras/xmlserializer;1"].
createInstance(Ci.nsIDOMSerializer);
serializer.serializeToStream(doc.documentElement, fos, null);
} catch (e) {
LOG("_serializeToFile: Error serializing engine:\n" + e);
}
closeSafeOutputStream(fos);
},
/**
* Remove the engine's file from disk. The search service calls this once it
* removes the engine from its internal store. This function will throw if
* the file cannot be removed.
*/
_remove: function SRCH_ENG_remove() {
ENSURE(!this._readOnly, "Can't remove read only engine!",
Cr.NS_ERROR_FAILURE);
ENSURE(this._file && this._file.exists(),
"Can't remove engine: file doesn't exist!",
Cr.NS_ERROR_FILE_NOT_FOUND);
this._file.remove(false);
},
// nsISearchEngine
get alias() {
if (this._alias === null)
this._alias = getLocalizedPref(this._pref + "alias", "");
return this._alias;
},
set alias(val) {
this._alias = val;
setLocalizedPref(this._pref + "alias", val);
notifyAction(this, SEARCH_ENGINE_CHANGED);
},
get description() {
return this._description;
},
get hidden() {
if (this._hidden === null) {
// Initialize the hidden property from a pref
this._hidden = getBoolPref(this._pref + "hidden", false);
}
return this._hidden;
},
set hidden(val) {
var value = !!val;
if (value != this._hidden) {
setBoolPref(this._pref + "hidden", value);
this._hidden = value;
notifyAction(this, SEARCH_ENGINE_CHANGED);
}
},
get iconURI() {
return this._iconURI;
},
get _iconURL() {
if (!this._iconURI)
return "";
return this._iconURI.spec;
},
// Where the engine is being loaded from: will return the URI's spec if the
// engine is being downloaded and does not yet have a file. This is only used
// for logging.
get _location() {
if (this._file)
return this._file.path;
if (this._uri)
return this._uri.spec;
return "";
},
get name() {
return this._name;
},
get type() {
return this._type;
},
get searchForm() {
// XXX OpenSearch has a searchForm attribute, should use it instead of this
// ugly ugly hack
return makeURI("http://" + makeURI(this._urls[0].template).host).spec;
},
get queryCharset() {
if (this._queryCharset)
return this._queryCharset;
return this._queryCharset = getCharSetFromCode(/* get the default */);
},
addParam: function SRCH_ENG_addParam(aName, aValue) {
ENSURE_ARG(aName && aValue,
"missing name or value for nsISearchEngine::addParam!");
ENSURE_WARN(!this._readOnly,
"called nsISearchEngine::addParam on a read-only engine!",
Cr.NS_ERROR_FAILURE);
this._urls[0].addParam(aName, aValue);
},
getSubmission: function SRCH_ENG_getSubmission(aData) {
ENSURE_WARN(this._urls[0], "engine object has no URL!",
Cr.NS_ERROR_UNEXPECTED);
LOG("getSubmission: In data: \"" + aData + "\"");
var textToSubURI = Cc["@mozilla.org/intl/texttosuburi;1"].
getService(Ci.nsITextToSubURI);
var data = "";
try {
data = textToSubURI.ConvertAndEscape(this.queryCharset, aData);
} catch (ex) {
LOG("getSubmission: Falling back to default queryCharset!");
data = textToSubURI.ConvertAndEscape(DEFAULT_QUERY_CHARSET, aData);
}
LOG("getSubmission: Out data: \"" + data + "\"");
return this._urls[0].getSubmission(data); //XXX only support one URL?
},
// nsISupports
QueryInterface: function SRCH_ENG_QI(aIID) {
if (aIID.equals(Ci.nsISearchEngine) ||
aIID.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
},
get wrappedJSObject() {
return this;
}
};
// nsISearchSubmission
function Submission(aURI, aPostData) {
this._uri = aURI;
this._postData = aPostData;
}
Submission.prototype = {
get uri() {
return this._uri;
},
get postData() {
return this._postData;
},
QueryInterface: function SRCH_SUBM_QI(aIID) {
if (aIID.equals(Ci.nsISearchSubmission) ||
aIID.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
}
}
// nsIBrowserSearchService
function SearchService() {
this._init();
}
SearchService.prototype = {
_engines: { },
_sortedEngines: [],
_init: function() {
this._addObservers();
var fileLocator = Cc["@mozilla.org/file/directory_service;1"].
getService(Ci.nsIProperties);
var locations = fileLocator.get(NS_APP_SEARCH_DIR_LIST,
Ci.nsISimpleEnumerator);
while (locations.hasMoreElements()) {
var location = locations.getNext().QueryInterface(Ci.nsIFile);
this._loadEngines(location);
}
// Now that all engines are loaded, build the sorted engine list
this._buildSortedEngineList();
selectedEngineName = getLocalizedPref(BROWSER_SEARCH_PREF +
"selectedEngine");
this._currentEngine = this.getEngineByName(selectedEngineName) ||
this.defaultEngine;
},
_addEngineToStore: function SRCH_SVC_addEngineToStore(aEngine) {
LOG("_addEngineToStore: Adding engine: \"" + aEngine.name + "\"");
// XXX Prefer XML files?
if (aEngine.name in this._engines) {
LOG("_addEngineToStore: Duplicate engine found, aborting!");
return;
// XXX handle duplicates better?
// might want to prompt the user in the case where the engine is being
// added through a user action
}
this._engines[aEngine.name] = aEngine;
this._sortedEngines.push(aEngine);
notifyAction(aEngine, SEARCH_ENGINE_ADDED);
},
_loadEngines: function SRCH_SVC_loadEngines(aDir) {
LOG("_loadEngines: Searching in " + aDir.path + " for search engines.");
// Check whether aDir is the user profile dir
var isInProfile = aDir.equals(getDir(NS_APP_USER_SEARCH_DIR));
var files = aDir.directoryEntries
.QueryInterface(Ci.nsIDirectoryEnumerator);
var ios = Cc["@mozilla.org/network/io-service;1"].
getService(Ci.nsIIOService);
while (files.hasMoreElements()) {
var file = files.nextFile;
// Ignore hidden and empty files, and directories
if (file.fileSize == 0 || !file.isFile() || file.isHidden())
continue;
var fileURL = ios.newFileURI(file).QueryInterface(Ci.nsIURL);
var fileExtension = fileURL.fileExtension.toLowerCase();
var isWritable = isInProfile && file.isWritable();
var dataType;
switch (fileExtension) {
case XML_FILE_EXT:
dataType = SEARCH_DATA_XML;
break;
case SHERLOCK_FILE_EXT:
dataType = SEARCH_DATA_TEXT;
break;
default:
// Not an engine
continue;
}
var addedEngine = null;
try {
addedEngine = new Engine(file, dataType, !isWritable);
addedEngine._initFromFile();
} catch (ex) {
LOG("_loadEngines: Failed to load " + file.path + "!\n" + ex);
continue;
}
if (fileExtension == SHERLOCK_FILE_EXT) {
if (isWritable) {
try {
this._convertSherlockFile(addedEngine, fileURL.fileBaseName);
} catch (ex) {
LOG("_loadEngines: Failed to convert: " + fileURL.path + "\n" + ex);
// The engine couldn't be converted, mark it as read-only
addedEngine._readOnly = true;
}
}
// If the engine still doesn't have an icon, see if we can find one
if (!addedEngine._iconURI) {
var icon = this._findSherlockIcon(file, fileURL.fileBaseName);
if (icon)
addedEngine._iconURI = ios.newFileURI(icon);
}
}
this._addEngineToStore(addedEngine);
}
},
_saveSortedEngineList: function SRCH_SVC_saveSortedEngineList() {
var preferences = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService);
var orderBranch = preferences.getBranch(BROWSER_SEARCH_PREF + "order.");
// First, reset the old branch
for (var i = 1; orderBranch.prefHasUserValue(i); ++i)
orderBranch.clearUserPref(i);
// Now, create the new branch
var pls = Cc["@mozilla.org/pref-localizedstring;1"].
createInstance(Ci.nsIPrefLocalizedString);
var engines = this._getSortedEngines(false);
for (var i = 0; i < engines.length; ++i) {
pls.data = engines[i].name;
orderBranch.setComplexValue(i+1, Ci.nsIPrefLocalizedString, pls);
}
// Save the pref file explicitly, since we're called at XPCOM shutdown
preferences.savePrefFile(null);
},
_buildSortedEngineList: function SRCH_SVC_buildSortedEngineList() {
var addedEngines = { };
this._sortedEngines = [];
var engineName, engine;
var i = 0;
// Get sorted engines first
while (true) {
engineName = getLocalizedPref(BROWSER_SEARCH_PREF + "order." + (++i));
if (!engineName)
break;
engine = this._engines[engineName];
if (!engine || (engineName in addedEngines))
continue;
this._sortedEngines.push(engine);
addedEngines[engineName] = engine;
}
// Array for the remaining engines, alphabetically sorted
var alphaEngines = [];
for (engineName in this._engines) {
engine = this._engines[engineName];
if (!(engineName in addedEngines))
alphaEngines.push(this._engines[engineName]);
}
alphaEngines = alphaEngines.sort(function (a, b) {
if (a.name < b.name)
return -1;
if (a.name > b.name)
return 1;
return 0;
});
this._sortedEngines = this._sortedEngines.concat(alphaEngines);
},
/**
* Converts a Sherlock file and its icon into the custom XML format used by
* the Search Service. Saves the engine's icon (if present) into the XML as a
* data: URI and changes the extension of the source file from ".src" to
* ".xml". The engine data is then written to the file as XML.
* @param aEngine
* The Engine object that needs to be converted.
* @param aBaseName
* The basename of the Sherlock file.
* Example: "foo" for file "foo.src".
*
* @throws NS_ERROR_FAILURE if the file could not be converted.
*
* @see nsIURL::fileBaseName
*/
_convertSherlockFile: function SRCH_SVC_convertSherlock(aEngine, aBaseName) {
var oldSherlockFile = aEngine._file;
// Back up the old file
try {
var backupDir = oldSherlockFile.parent;
backupDir.append("searchplugins-backup");
if (!backupDir.exists())
backupDir.create(Ci.nsIFile.DIRECTORY_TYPE, PERMS_DIRECTORY);
oldSherlockFile.copyTo(backupDir, null);
} catch (ex) {
// Just bail. Engines that can't be backed up won't be converted, but
// engines that aren't converted are loaded as readonly.
LOG("_convertSherlockFile: Couldn't back up " + oldSherlockFile.path +
":\n" + ex);
throw Cr.NS_ERROR_FAILURE;
}
// Rename the file, but don't clobber existing files
var newXMLFile = oldSherlockFile.parent.clone();
newXMLFile.append(aBaseName + "." + XML_FILE_EXT);
if (newXMLFile.exists()) {
// There is an existing file with this name, create a unique file
newXMLFile.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, PERMS_FILE);
}
// Rename the .src file to .xml
oldSherlockFile.moveTo(null, newXMLFile.leafName);
aEngine._file = newXMLFile;
// Write the converted engine to disk
aEngine._serializeToFile();
// See if it has a corresponding icon
try {
var icon = this._findSherlockIcon(aEngine._file, aBaseName);
if (icon && icon.fileSize < MAX_ICON_SIZE) {
// Use this as the engine's icon
var bStream = Cc["@mozilla.org/binaryinputstream;1"].
createInstance(Ci.nsIBinaryInputStream);
var fileInStream = Cc["@mozilla.org/network/file-input-stream;1"].
createInstance(Ci.nsIFileInputStream);
fileInStream.init(icon, MODE_RDONLY, PERMS_FILE, 0);
bStream.setInputStream(fileInStream);
var bytes = [];
while (bStream.available() != 0)
bytes = bytes.concat(bStream.readByteArray(bStream.available()));
bStream.close();
// Convert the byte array to a base64-encoded string
var str = b64(bytes);
aEngine._iconURI = makeURI(ICON_DATAURL_PREFIX + str);
LOG("_importSherlockEngine: Set sherlock iconURI to: \"" +
aEngine._iconURL + "\"");
// Write the engine to disk to save changes
aEngine._serializeToFile();
// Delete the icon now that we're sure everything's been saved
icon.remove(false);
}
} catch (ex) { LOG("_convertSherlockFile: Error setting icon:\n" + ex); }
},
/**
* Finds an icon associated to a given Sherlock file. Searches the provided
* file's parent directory looking for files with the same base name and one
* of the file extensions in SHERLOCK_ICON_EXTENSIONS.
* @param aEngineFile
* The Sherlock plugin file.
* @param aBaseName
* The basename of the Sherlock file.
* Example: "foo" for file "foo.src".
* @see nsIURL::fileBaseName
*/
_findSherlockIcon: function SRCH_SVC_findSherlock(aEngineFile, aBaseName) {
for (var i = 0; i < SHERLOCK_ICON_EXTENSIONS.length; i++) {
var icon = aEngineFile.parent.clone();
icon.append(aBaseName + SHERLOCK_ICON_EXTENSIONS[i]);
if (icon.exists() && icon.isFile())
return icon;
}
return null;
},
/**
* Get a sorted array of engines.
* @param aWithHidden
* True if hidden plugins should be included in the result.
*/
_getSortedEngines: function SRCH_SVC_getSorted(aWithHidden) {
if (aWithHidden)
return this._sortedEngines;
return this._sortedEngines.filter(function (engine) {
return !engine.hidden;
});
},
// nsIBrowserSearchService
getEngines: function SRCH_SVC_getEngines(aCount) {
LOG("getEngines: getting all engines");
var engines = this._getSortedEngines(true);
aCount.value = engines.length;
return engines;
},
getVisibleEngines: function SRCH_SVC_getVisible(aCount) {
LOG("getVisibleEngines: getting all visible engines");
var engines = this._getSortedEngines(false);
aCount.value = engines.length;
return engines;
},
getEngineByName: function SRCH_SVC_getEngineByName(aEngineName) {
return this._engines[aEngineName] || null;
},
getEngineByAlias: function SRCH_SVC_getEngineByAlias(aAlias) {
for (var engineName in this._engines) {
var engine = this._engines[engineName];
if (engine && engine.alias == aAlias)
return engine;
}
return null;
},
addEngineWithDetails: function SRCH_SVC_addEWD(aName, aIconURL, aAlias,
aDescription, aMethod,
aTemplate) {
ENSURE_ARG(aName, "Invalid name passed to addEngineWithDetails!");
ENSURE_ARG(aMethod, "Invalid method passed to addEngineWithDetails!");
ENSURE_ARG(aTemplate, "Invalid template passed to addEngineWithDetails!");
ENSURE(!this._engines[aName], "An engine with that name already exists!",
Cr.NS_ERROR_FILE_ALREADY_EXISTS);
var engine = new Engine(getSanitizedFile(aName), SEARCH_DATA_XML, false);
engine._initFromMetadata(aName, aIconURL, aAlias, aDescription,
aMethod, aTemplate);
this._addEngineToStore(engine);
},
addEngine: function SRCH_SVC_addEngine(aEngineURL, aType, aIconURL) {
LOG("addEngine: Adding \"" + aEngineURL + "\".");
try {
var engine = new Engine(makeURI(aEngineURL), aType, false);
engine._initFromURI();
} catch (ex) {
LOG("addEngine: Error adding engine:\n" + ex);
throw Cr.NS_ERROR_FAILURE;
}
engine._setIcon(aIconURL);
},
removeEngine: function SRCH_SVC_removeEngine(aEngine) {
ENSURE_ARG(aEngine, "no engine passed to removeEngine!");
var engineToRemove = null;
for (var e in this._engines)
if (aEngine.wrappedJSObject == this._engines[e])
engineToRemove = this._engines[e];
ENSURE(engineToRemove, "removeEngine: Can't find engine to remove!",
Cr.NS_ERROR_FILE_NOT_FOUND);
if (engineToRemove == this.currentEngine)
this._currentEngine = null;
if (engineToRemove._readOnly) {
// Just hide it (the "hidden" setter will notify)
engineToRemove.hidden = true;
} else {
// Remove the engine file from disk (this might throw)
engineToRemove._remove();
// Remove the engine from _sortedEngines
var index = this._sortedEngines.indexOf(engineToRemove);
ENSURE(index != -1, "Can't find engine to remove in _sortedEngines!",
Cr.NS_ERROR_FAILURE);
this._sortedEngines.splice(index, 1);
// Remove the engine from the internal store
delete this._engines[engineToRemove.name];
notifyAction(engineToRemove, SEARCH_ENGINE_REMOVED);
}
},
moveEngine: function SRCH_SVC_moveEngine(aEngine, aNewIndex) {
ENSURE_ARG((aNewIndex < this._sortedEngines.length) && (aNewIndex >= 0),
"SRCH_SVC_moveEngine: Index out of bounds!");
ENSURE_ARG(aEngine instanceof Ci.nsISearchEngine,
"SRCH_SVC_moveEngine: Invalid engine passed to moveEngine!");
var engine = aEngine.wrappedJSObject;
var currentIndex = this._sortedEngines.indexOf(engine);
ENSURE(currentIndex != -1, "moveEngine: Can't find engine to move!",
Cr.NS_ERROR_UNEXPECTED);
// Swap the two engines
this._sortedEngines[currentIndex] = this._sortedEngines[aNewIndex];
this._sortedEngines[aNewIndex] = engine;
notifyAction(engine, SEARCH_ENGINE_CHANGED);
},
get defaultEngine() {
const defPref = BROWSER_SEARCH_PREF + "defaultenginename";
// Get the default engine - this pref should always exist, but the engine
// might be hidden
this._defaultEngine = this.getEngineByName(getLocalizedPref(defPref, ""));
if (!this._defaultEngine || this._defaultEngine.hidden)
this._defaultEngine = this._getSortedEngines(false)[0] || null;
return this._defaultEngine;
},
get currentEngine() {
if (!this._currentEngine || this._currentEngine.hidden)
this._currentEngine = this.defaultEngine;
return this._currentEngine;
},
set currentEngine(val) {
ENSURE_ARG(val instanceof Ci.nsISearchEngine,
"Invalid argument passed to currentEngine setter");
var newCurrentEngine = this.getEngineByName(val.name);
ENSURE(newCurrentEngine, "Can't find engine in store!",
Cr.NS_ERROR_UNEXPECTED);
this._currentEngine = newCurrentEngine;
setLocalizedPref(BROWSER_SEARCH_PREF + "selectedEngine",
this._currentEngine.name);
notifyAction(this._currentEngine, SEARCH_ENGINE_CURRENT);
},
// nsIObserver
observe: function SRCH_SVC_observe(aEngine, aTopic, aVerb) {
switch (aTopic) {
case SEARCH_ENGINE_TOPIC:
if (aVerb == SEARCH_ENGINE_LOADED) {
var engine = aEngine.QueryInterface(Ci.nsISearchEngine);
LOG("nsISearchEngine::observe: Done installation of " + engine.name
+ ".");
this._addEngineToStore(engine.wrappedJSObject);
}
break;
case XPCOM_SHUTDOWN_TOPIC:
this._saveSortedEngineList();
this._removeObservers();
break;
}
},
_addObservers: function SRCH_SVC_addObservers() {
var os = Cc["@mozilla.org/observer-service;1"].
getService(Ci.nsIObserverService);
os.addObserver(this, SEARCH_ENGINE_TOPIC, false);
os.addObserver(this, XPCOM_SHUTDOWN_TOPIC, false);
},
_removeObservers: function SRCH_SVC_removeObservers() {
var os = Cc["@mozilla.org/observer-service;1"].
getService(Ci.nsIObserverService);
os.removeObserver(this, SEARCH_ENGINE_TOPIC);
os.removeObserver(this, XPCOM_SHUTDOWN_TOPIC);
},
QueryInterface: function SRCH_SVC_QI(aIID) {
if (aIID.equals(Ci.nsIBrowserSearchService) ||
aIID.equals(Ci.nsIObserver) ||
aIID.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
}
};
const kClassID = Components.ID("{7319788a-fe93-4db3-9f39-818cf08f4256}");
const kClassName = "Browser Search Service";
const kContractID = "@mozilla.org/browser/search-service;1";
// nsIFactory
const kFactory = {
createInstance: function (outer, iid) {
if (outer != null)
throw Cr.NS_ERROR_NO_AGGREGATION;
return (new SearchService()).QueryInterface(iid);
}
};
// nsIModule
const gModule = {
registerSelf: function (componentManager, fileSpec, location, type) {
componentManager.QueryInterface(Ci.nsIComponentRegistrar);
componentManager.registerFactoryLocation(kClassID,
kClassName,
kContractID,
fileSpec, location, type);
},
unregisterSelf: function(componentManager, fileSpec, location) {
componentManager.QueryInterface(Ci.nsIComponentRegistrar);
componentManager.unregisterFactoryLocation(kClassID, fileSpec);
},
getClassObject: function (componentManager, cid, iid) {
if (!cid.equals(kClassID))
throw Cr.NS_ERROR_NO_INTERFACE;
if (!iid.equals(Ci.nsIFactory))
throw Cr.NS_ERROR_NOT_IMPLEMENTED;
return kFactory;
},
canUnload: function (componentManager) {
return true;
}
};
function NSGetModule(componentManager, fileSpec) {
return gModule;
}
#include ../../../toolkit/content/debug.js
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