Issue 6735 - Store domains in lower case

lib/filterClasses.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 369 matching lines @@
   domainSource: null,
 
   /**
    * Separator character used in domainSource property, must be
    * overridden by subclasses
    * @type {string}
    */
   domainSeparator: null,
 
   /**
-   * Determines whether domainSource is already upper-case,
+   * Determines whether domainSource is already lower-case,
    * can be overridden by subclasses.
    * @type {boolean}
    */
-  domainSourceIsUpperCase: false,
+  domainSourceIsLowerCase: false,
 
   /**
    * Map containing domains that this filter should match on/not match
    * on or null if the filter should match on all domains
    * @type {?Map.<string,boolean>}
    */
   get domains()
   {
     // Despite this property being cached, the getter is called
     // several times on Safari, due to WebKit bug 132872
     let prop = Object.getOwnPropertyDescriptor(this, "domains");
     if (prop)
       return prop.value;
 
     let domains = null;
 
     if (this.domainSource)
     {
       let source = this.domainSource;
-      if (!this.domainSourceIsUpperCase)
+      if (!this.domainSourceIsLowerCase)
       {
-        // RegExpFilter already have uppercase domains
-        source = source.toUpperCase();
+        // RegExpFilter already have lowercase domains
+        source = source.toLowerCase();
       }
       let list = source.split(this.domainSeparator);
       if (list.length == 1 && list[0][0] != "~")
       {
         // Fast track for the common one-domain scenario
         domains = new Map([["", false], [list[0], true]]);
       }
       else
       {
         let hasIncludes = false;
@@ skipping 56 matching lines @@
 
     // If no domains are set the rule matches everywhere
     if (!this.domains)
       return true;
 
     // If the document has no host name, match only if the filter
     // isn't restricted to specific domains
     if (!docDomain)
       return this.domains.get("");
 
-    docDomain = docDomain.replace(/\.+$/, "").toUpperCase();
+    docDomain = docDomain.replace(/\.+$/, "").toLowerCase();
 
     while (true)
     {
       let isDomainIncluded = this.domains.get(docDomain);
       if (typeof isDomainIncluded != "undefined")
         return isDomainIncluded;
 
       let nextDot = docDomain.indexOf(".");
       if (nextDot < 0)
         break;
       docDomain = docDomain.substr(nextDot + 1);
     }
     return this.domains.get("");
   },
 
   /**
    * Checks whether this filter is active only on a domain and its subdomains.
    * @param {string} docDomain
    * @return {boolean}
    */
   isActiveOnlyOnDomain(docDomain)
   {
     if (!docDomain || !this.domains || this.domains.get(""))
       return false;
 
-    docDomain = docDomain.replace(/\.+$/, "").toUpperCase();
+    docDomain = docDomain.replace(/\.+$/, "").toLowerCase();
 
     for (let [domain, isIncluded] of this.domains)
     {
       if (isIncluded && domain != docDomain)
       {
         if (domain.length <= docDomain.length)
           return false;
 
         if (!domain.endsWith("." + docDomain))
           return false;
@@ skipping 80 matching lines @@
   else
   {
     // No need to convert this filter to regular expression yet, do it on demand
     this.regexpSource = regexpSource;
   }
 }
 exports.RegExpFilter = RegExpFilter;
 
 RegExpFilter.prototype = extend(ActiveFilter, {
   /**
-   * @see ActiveFilter.domainSourceIsUpperCase
+   * @see ActiveFilter.domainSourceIsLowerCase
    */
-  domainSourceIsUpperCase: true,
+  domainSourceIsLowerCase: true,
 
   /**
    * Number of filters contained, will always be 1 (required to
    * optimize Matcher).
    * @type {number}
    */
   length: 1,
 
   /**
    * @see ActiveFilter.domainSeparator
@@ skipping 132 matching lines @@
     text = match.input.substr(0, match.index);
     for (let option of options)
     {
       let value = null;
       let separatorIndex = option.indexOf("=");
       if (separatorIndex >= 0)
       {
         value = option.substr(separatorIndex + 1);
         option = option.substr(0, separatorIndex);
       }
-      option = option.replace(/-/, "_").toUpperCase();
-      if (option in RegExpFilter.typeMap)
+      let type = (option[0] == "~" ? option.substr(1) : option)

[Manish Jethani, 2018/06/06 14:59:13]

This part may seem unrelated but the goal is to avoid uppercasing and then
lowercasing again.

+                 .replace(/-/, "_").toUpperCase();
+      option = option.toLowerCase();
+      if (type in RegExpFilter.typeMap)
       {
-        if (contentType == null)
-          contentType = 0;
-        contentType |= RegExpFilter.typeMap[option];
+        if (option[0] == "~")
+        {
+          if (contentType == null)
+            ({contentType} = RegExpFilter.prototype);
+          contentType &= ~RegExpFilter.typeMap[type];
+        }
+        else
+        {
+          if (contentType == null)
+            contentType = 0;
+          contentType |= RegExpFilter.typeMap[type];
 
-        if (option == "CSP" && value)
-          csp = value;
+          if (type == "CSP" && value)
+            csp = value;
+        }
       }
-      else if (option[0] == "~" && option.substr(1) in RegExpFilter.typeMap)
-      {
-        if (contentType == null)
-          ({contentType} = RegExpFilter.prototype);
-        contentType &= ~RegExpFilter.typeMap[option.substr(1)];
-      }
-      else if (option == "MATCH_CASE")
+      else if (option == "match-case")
         matchCase = true;
-      else if (option == "~MATCH_CASE")
+      else if (option == "~match-case")
         matchCase = false;
-      else if (option == "DOMAIN" && value)
-        domains = value.toUpperCase();
-      else if (option == "THIRD_PARTY")
+      else if (option == "domain" && value)
+        domains = value.toLowerCase();
+      else if (option == "third-party")
         thirdParty = true;
-      else if (option == "~THIRD_PARTY")
+      else if (option == "~third-party")
         thirdParty = false;
-      else if (option == "COLLAPSE")
+      else if (option == "collapse")
         collapse = true;
-      else if (option == "~COLLAPSE")
+      else if (option == "~collapse")
         collapse = false;
-      else if (option == "SITEKEY" && value)
+      else if (option == "sitekey" && value)
         sitekeys = value.toUpperCase();
-      else if (option == "REWRITE" && value)
+      else if (option == "rewrite" && value)
         rewrite = value;
       else
         return new InvalidFilter(origText, "filter_unknown_option");
     }
   }
 
   // For security reasons, never match $rewrite filters
   // against requests that might load any code to be executed.
   if (rewrite != null)
   {
@@ skipping 281 matching lines @@
  */
 function ElemHideEmulationFilter(text, domains, selector)
 {
   ElemHideBase.call(this, text, domains, selector);
 }
 exports.ElemHideEmulationFilter = ElemHideEmulationFilter;
 
 ElemHideEmulationFilter.prototype = extend(ElemHideBase, {
   type: "elemhideemulation"
 });