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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
module.metadata = {
"stability": "unstable"
};
const { URL } = require("../url");
exports.MatchPattern = MatchPattern;
function MatchPattern(pattern) {
if (typeof pattern.test == "function") {
// For compatibility with -moz-document rules, we require the RegExp's
// global, ignoreCase, and multiline flags to be set to false.
if (pattern.global) {
throw new Error("A RegExp match pattern cannot be set to `global` " +
"(i.e. //g).");
}
if (pattern.ignoreCase) {
throw new Error("A RegExp match pattern cannot be set to `ignoreCase` " +
"(i.e. //i).");
}
if (pattern.multiline) {
throw new Error("A RegExp match pattern cannot be set to `multiline` " +
"(i.e. //m).");
}
this.regexp = pattern;
}
else {
let firstWildcardPosition = pattern.indexOf("*");
let lastWildcardPosition = pattern.lastIndexOf("*");
if (firstWildcardPosition != lastWildcardPosition)
throw new Error("There can be at most one '*' character in a wildcard.");
if (firstWildcardPosition == 0) {
if (pattern.length == 1)
this.anyWebPage = true;
else if (pattern[1] != ".")
throw new Error("Expected a *.<domain name> string, got: " + pattern);
else
this.domain = pattern.substr(2);
}
else {
if (pattern.indexOf(":") == -1) {
throw new Error("When not using *.example.org wildcard, the string " +
"supplied is expected to be either an exact URL to " +
"match or a URL prefix. The provided string ('" +
pattern + "') is unlikely to match any pages.");
}
if (firstWildcardPosition == -1)
this.exactURL = pattern;
else if (firstWildcardPosition == pattern.length - 1)
this.urlPrefix = pattern.substr(0, pattern.length - 1);
else {
throw new Error("The provided wildcard ('" + pattern + "') has a '*' " +
"in an unexpected position. It is expected to be the " +
"first or the last character in the wildcard.");
}
}
}
}
MatchPattern.prototype = {
test: function MatchPattern_test(urlStr) {
try {
var url = URL(urlStr);
}
catch (err) {
return false;
}
// Test the URL against a RegExp pattern. For compatibility with
// -moz-document rules, we require the RegExp to match the entire URL,
// so we not only test for a match, we also make sure the matched string
// is the entire URL string.
//
// Assuming most URLs don't match most match patterns, we call `test` for
// speed when determining whether or not the URL matches, then call `exec`
// for the small subset that match to make sure the entire URL matches.
//
if (this.regexp && this.regexp.test(urlStr) &&
this.regexp.exec(urlStr)[0] == urlStr)
return true;
if (this.anyWebPage && /^(https?|ftp)$/.test(url.scheme))
return true;
if (this.exactURL && this.exactURL == urlStr)
return true;
if (this.domain && url.host &&
url.host.slice(-this.domain.length) == this.domain)
return true;
if (this.urlPrefix && 0 == urlStr.indexOf(this.urlPrefix))
return true;
return false;
}
};
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