Import to new git repository

The old repository was using almost 100mb of space because of all
the unnecessary files in the history. So I've imported the code to a
new git repository. Unfortunately the history isn't viewable from this
repository anymore. To see what happened with LibreJS before 2015, see
the old Bazaar repo here: http://bzr.savannah.gnu.org/lh/librejs/

1 files changed, 189 insertions, 0 deletions

diff --git a/lib/script_entries/scripts_cache.js b/lib/script_entries/scripts_cache.js
new file mode 100644
index 0000000..ca477cc
--- /dev/null
+++ b/lib/script_entries/scripts_cache.js
@@ -0,0 +1,189 @@
+/**
+ * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
+ * *
+ * Copyright (C) 2011, 2012, 2013, 2014 Loic J. Duros
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see  <http://www.gnu.org/licenses/>.
+ *
+ */
+var relationCheckerObj = require("js_checker/relation_checker").relationChecker;
+
+// import free_libraries to populate the cache hash map.
+var free_libraries = require("script_entries/free_libraries");
+
+var crypto = require('script_entries/crypto');
+const checkTypes = require("js_checker/constant_types").checkTypes;
+
+// cachedResults contains objects with result/relationChecker for
+// scripts entries indexed by SHA1sum
+var cachedResults = {};
+
+/**
+ * ScriptsCached keeps a cache of whitelisted scripts in the browser
+ * session.
+ */
+var ScriptsCached = function() {
+};
+
+ScriptsCached.prototype.getHash = function(scriptText) {
+    require('ui/notification').createNotification(scriptText.substring(0,100));
+
+    return crypto.sha1Encrypt(scriptText);
+};
+
+/**
+ * resetCache
+ * Resets the full cache and re-initialize
+ * the free libraries list.
+ */
+ScriptsCached.prototype.resetCache = function () {
+    cachedResults = {};
+    free_libraries.init();
+};
+  
+/**
+ * 
+ * addEntry
+ * 
+ * Adds a script entry to the cache by providing the results
+ * and the actual script text.
+ * 
+ */
+ScriptsCached.prototype.addEntry = function(
+        scriptText, result, relationChecker, allowTrivial, url) {
+    console.debug("result addEntry is", JSON.stringify(result));
+    cachedResults[this.getHash(scriptText)] = {
+        'result': result,
+        'relationChecker': relationCheckerObj(),
+        'allowTrivial': allowTrivial,
+        'url': url
+    };
+};
+
+/**
+ * 
+ * addEntry
+ * 
+ * Adds a script entry to the cache by providing the results
+ * using the script's hash.
+ * 
+ */
+ScriptsCached.prototype.addEntryByHash = function(
+        hash, result, relationChecker, allowTrivial, url) {
+    cachedResults[hash] = {
+        'result': result,
+        'relationChecker': relationCheckerObj(),
+        'allowTrivial': allowTrivial,
+        'url': url || ''
+    };
+};
+
+/**
+ *  removeEntryByHash
+ *  
+ *  Remove an entry from the cache using hash key.
+ */
+ScriptsCached.prototype.removeEntryByHash = function(hash) {
+    delete cachedResults[hash];
+};
+  
+/**
+ * addEntryIfNotCached
+ * 
+ * Checks first if entry is cached before attempting to cache result.
+ */
+ScriptsCached.prototype.addEntryIfNotCached = function(
+        scriptText, result, relationChecker, allowTrivial, url) {
+    // save a bit of computing by getting hash once.
+    var hash = this.getHash(scriptText);
+    console.debug('hash is then', hash);
+    if (!this.isCached(scriptText, hash)) {
+        cachedResults[hash] = {
+            'result': result,
+            'relationChecker': relationCheckerObj(),
+            'allowTrivial': allowTrivial,
+            'url': url || ''
+        };
+    }
+    return hash;
+};
+
+/**
+ * 
+ * addObjectEntry
+ * 
+ * Adds a script entry by providing an object.
+ * Used to provide free library hashes from free_libraries.js
+ * 
+ */
+ScriptsCached.prototype.addObjectEntry = function(hash, script) {
+    cachedResults[hash] = script;
+};
+
+ScriptsCached.prototype.isCached = function(scriptText, hash) {
+    var scriptHash;
+    console.debug("Is CACHED start?");
+    try {
+        if (typeof hash === 'string') {
+            scriptHash = hash;
+        } else {
+            scriptHash = this.getHash(scriptText);
+        }
+        if (typeof scriptHash === 'string') {
+            let cachedResult = cachedResults[scriptHash];
+            if (cachedResult) {
+                // exact copy of file has already been cached.
+                console.debug('scriptHash is', cachedResult);
+                if (cachedResult.relationChecker == "[rl]") {
+                    cachedResult.relationChecker = {}; //relationCheckerObj();
+                }          
+                console.debug("Is Cached ENd TRUE");
+                return cachedResult;
+            }
+        }
+        return false;
+    } catch (e) {
+        console.debug("an error", scriptHash, e, e.linenumber, e.filename);
+    }
+};
+
+/**
+ * Writes allowed scripts to the cache.
+ * nonfree/nontrivial scripts are not added to the cache.
+ */
+ScriptsCached.prototype.getCacheForWriting = function() {
+    var formattedResults = {};
+    for (let item in cachedResults) {
+        let type = cachedResults[item].result.type;
+        if (type != checkTypes.NONTRIVIAL &&
+            type != checkTypes.TRIVIAL_DEFINES_FUNCTION
+           ) {
+            formattedResults[item] = cachedResults[item];
+        }
+    }
+    return formattedResults;
+};
+
+/**
+ * Import data from database into cachedResults.
+ * Calling this function replaces the current cache if it exists.
+ */
+ScriptsCached.prototype.bulkImportCache = function(data) {
+    cachedResults = data;
+    console.debug("Imported data. Number of keys ISSS ",
+                  Object.keys(cachedResults).length);
+    console.debug("It looks like ", JSON.stringify(cachedResults));
+};
+
+exports.scriptsCached = new ScriptsCached();