1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "content/browser/service_worker/service_worker_utils.h" 6 7 #include <string> 8 9 #include "base/command_line.h" 10 #include "base/logging.h" 11 #include "content/public/common/content_switches.h" 12 #include "url/gurl.h" 13 14 namespace content { 15 16 // static 17 bool ServiceWorkerUtils::IsFeatureEnabled() { 18 static bool enabled = CommandLine::ForCurrentProcess()->HasSwitch( 19 switches::kEnableServiceWorker); 20 return enabled; 21 } 22 23 // static 24 bool ServiceWorkerUtils::ScopeMatches(const GURL& scope, const GURL& url) { 25 DCHECK(!scope.has_ref()); 26 DCHECK(!url.has_ref()); 27 const std::string& scope_spec = scope.spec(); 28 const std::string& url_spec = url.spec(); 29 30 size_t len = scope_spec.size(); 31 if (len > 0 && scope_spec[len - 1] == '*') 32 return scope_spec.compare(0, len - 1, url_spec, 0, len - 1) == 0; 33 return scope_spec == url_spec; 34 } 35 36 bool LongestScopeMatcher::MatchLongest(const GURL& scope) { 37 if (!ServiceWorkerUtils::ScopeMatches(scope, url_)) 38 return false; 39 if (match_.is_empty()) { 40 match_ = scope; 41 return true; 42 } 43 44 const std::string match_spec = match_.spec(); 45 const std::string scope_spec = scope.spec(); 46 if (match_spec.size() < scope_spec.size()) { 47 match_ = scope; 48 return true; 49 } 50 51 // If |scope| has the same length with |match_|, they are compared as strings. 52 // For example: 53 // 1) for a document "/foo", "/foo" is prioritized over "/fo*". 54 // 2) for a document "/f(1)", "/f(1*" is prioritized over "/f(1)". 55 // TODO(nhiroki): This isn't in the spec. 56 // (https://github.com/slightlyoff/ServiceWorker/issues/287) 57 if (match_spec.size() == scope_spec.size() && match_spec < scope_spec) { 58 match_ = scope; 59 return true; 60 } 61 62 return false; 63 } 64 65 } // namespace content 66
