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Code Issues Releases Wiki Activity

code review: avoid prototype chains, fixed bad 1st-party test

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This commit is contained in:
gorhill 2014-09-21 09:40:54 -04:00
parent 97a8545d5c
commit d6b501b264
1 changed files with 18 additions and 26 deletions
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44
js/net-filtering.js
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@ -95,14 +95,10 @@ var histogram = function(label, categories) {
var h = [],
categoryBucket;
for ( var k in categories ) {
if ( categories.hasOwnProperty(k) === false ) {
continue;
}
// No need for hasOwnProperty() here: there is no prototype chain.
categoryBucket = categories[k];
for ( var kk in categoryBucket ) {
if ( categoryBucket.hasOwnProperty(kk) === false ) {
continue;
}
// No need for hasOwnProperty() here: there is no prototype chain.
filterBucket = categoryBucket[kk];
h.push({
k: k + ' ' + kk,
@ -1243,8 +1239,8 @@ FilterContainer.prototype.reset = function() {
this.allowFilterCount = 0;
this.blockFilterCount = 0;
this.duplicateCount = 0;
this.categories = {};
this.duplicates = {};
this.categories = Object.create(null);
this.duplicates = Object.create(null);
this.blockedAnyPartyHostnames.reset();
this.blocked3rdPartyHostnames.reset();
this.filterParser.reset();
@ -1256,7 +1252,7 @@ FilterContainer.prototype.freeze = function() {
//histogram('allFilters', this.categories);
this.blockedAnyPartyHostnames.freeze();
this.blocked3rdPartyHostnames.freeze();
this.duplicates = {};
this.duplicates = Object.create(null);
this.filterParser.reset();
this.frozen = true;
};
@ -1268,9 +1264,7 @@ FilterContainer.prototype.toSelfie = function() {
var selfie = [];
var bucket, ff, n, i, f;
for ( var k in dict ) {
if ( dict.hasOwnProperty(k) === false ) {
continue;
}
// No need for hasOwnProperty() here: there is no prototype chain.
// We need to encode the key because there could be a `\n` or '\t'
// character in it, which would trip the code at parse time.
selfie.push('k2\t' + encode(k));
@ -1292,9 +1286,7 @@ FilterContainer.prototype.toSelfie = function() {
var categoriesToSelfie = function(dict) {
var selfie = [];
for ( var k in dict ) {
if ( dict.hasOwnProperty(k) === false ) {
continue;
}
// No need for hasOwnProperty() here: there is no prototype chain.
// We need to encode the key because there could be a `\n` or '\t'
// character in it, which would trip the code at parse time.
selfie.push('k1\t' + encode(k));
@ -1372,7 +1364,7 @@ FilterContainer.prototype.fromSelfie = function(selfie) {
what = line.slice(0, pos);
if ( what === 'k1' ) {
catKey = decode(line.slice(pos + 1));
subdict = dict[catKey] = {};
subdict = dict[catKey] = Object.create(null);
bucket = null;
continue;
}
@ -1567,7 +1559,7 @@ FilterContainer.prototype.addToCategory = function(category, tokenKey, filter) {
var categoryKey = this.makeCategoryKey(category);
var categoryBucket = this.categories[categoryKey];
if ( !categoryBucket ) {
categoryBucket = this.categories[categoryKey] = {};
categoryBucket = this.categories[categoryKey] = Object.create(null);
}
var filterEntry = categoryBucket[tokenKey];
if ( filterEntry === undefined ) {
@ -1596,27 +1588,27 @@ FilterContainer.prototype.matchTokens = function(url) {
while ( matches = re.exec(url) ) {
beg = matches.index;
token = url.slice(beg, re.lastIndex);
if ( bucket0 !== undefined && bucket0.hasOwnProperty(token) ) {
if ( bucket0 !== undefined ) {
f = bucket0[token];
if ( f.match(url, beg) !== false ) {
if ( f !== undefined && f.match(url, beg) !== false ) {
return f;
}
}
if ( bucket1 !== undefined && bucket1.hasOwnProperty(token) ) {
if ( bucket1 !== undefined ) {
f = bucket1[token];
if ( f.match(url, beg) !== false ) {
if ( f !== undefined && f.match(url, beg) !== false ) {
return f;
}
}
if ( bucket2 !== undefined && bucket2.hasOwnProperty(token) ) {
if ( bucket2 !== undefined ) {
f = bucket2[token];
if ( f.match(url, beg) !== false ) {
if ( f !== undefined && f.match(url, beg) !== false ) {
return f;
}
}
if ( bucket3 !== undefined && bucket3.hasOwnProperty(token) ) {
if ( bucket3 !== undefined ) {
f = bucket3[token];
if ( f.match(url, beg) !== false ) {
if ( f !== undefined && f.match(url, beg) !== false ) {
return f;
}
}
@ -1758,7 +1750,7 @@ FilterContainer.prototype.matchString = function(pageDetails, requestURL, reques
var party = ThirdParty;
if ( requestHostname.slice(0 - pageDomain.length) === pageDomain ) {
// Be sure to not confuse 'example.com' with 'anotherexample.com'
var c = requestHostname.charAt(0 - pageDomain.length - 1);
var c = requestHostname.charAt(requestHostname.length - pageDomain.length - 1);
if ( c === '' || c === '.' ) {
party = FirstParty;
}