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b62e02d60e
Differential Revision: https://phabricator.services.mozilla.com/D39920 --HG-- extra : moz-landing-system : lando
88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "URLDecorationStripper.h"
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#include "mozilla/dom/URLSearchParams.h"
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#include "mozilla/Preferences.h"
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#include "nsCharSeparatedTokenizer.h"
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#include "nsEffectiveTLDService.h"
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#include "nsIURIMutator.h"
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namespace {
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static const char* kPrefName =
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"privacy.restrict3rdpartystorage.url_decorations";
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inline bool IgnoreWhitespace(char16_t c) { return false; }
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} // namespace
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namespace mozilla {
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nsresult URLDecorationStripper::StripTrackingIdentifiers(nsIURI* aURI,
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nsACString& aOutSpec) {
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nsAutoString tokenList;
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nsresult rv = Preferences::GetString(kPrefName, tokenList);
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ToLowerCase(tokenList);
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nsAutoCString path;
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rv = aURI->GetPathQueryRef(path);
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NS_ENSURE_SUCCESS(rv, rv);
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ToLowerCase(path);
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int32_t queryBegins = path.FindChar('?');
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// Only positive values are valid since the path must begin with a '/'.
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if (queryBegins > 0) {
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typedef nsCharSeparatedTokenizerTemplate<IgnoreWhitespace> Tokenizer;
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Tokenizer tokenizer(tokenList, ' ');
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nsAutoString token;
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while (tokenizer.hasMoreTokens()) {
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token = tokenizer.nextToken();
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if (token.IsEmpty()) {
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continue;
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}
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nsAutoString value;
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if (dom::URLParams::Extract(Substring(path, queryBegins + 1), token,
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value) &&
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!value.IsVoid()) {
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// Tracking identifier found in the URL!
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return StripToRegistrableDomain(aURI, aOutSpec);
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}
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}
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}
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return aURI->GetSpec(aOutSpec);
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}
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nsresult URLDecorationStripper::StripToRegistrableDomain(nsIURI* aURI,
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nsACString& aOutSpec) {
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NS_MutateURI mutator(aURI);
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mutator.SetPathQueryRef(EmptyCString()).SetUserPass(EmptyCString());
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RefPtr<nsEffectiveTLDService> etldService =
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nsEffectiveTLDService::GetInstance();
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NS_ENSURE_TRUE(etldService, NS_ERROR_FAILURE);
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nsAutoCString baseDomain;
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nsresult rv = etldService->GetBaseDomain(aURI, 0, baseDomain);
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if (NS_SUCCEEDED(rv)) {
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mutator.SetHost(baseDomain);
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} else {
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// If this is an IP address or something like "localhost", ignore the error.
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if (rv != NS_ERROR_HOST_IS_IP_ADDRESS &&
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rv != NS_ERROR_INSUFFICIENT_DOMAIN_LEVELS) {
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return rv;
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}
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}
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nsCOMPtr<nsIURI> uri;
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rv = mutator.Finalize(uri);
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NS_ENSURE_SUCCESS(rv, rv);
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return uri->GetSpec(aOutSpec);
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}
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} // namespace mozilla
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