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
IsFeatureEnabled()17 bool ServiceWorkerUtils::IsFeatureEnabled() {
18 static bool enabled = CommandLine::ForCurrentProcess()->HasSwitch(
19 switches::kEnableServiceWorker);
20 return enabled;
21 }
22
23 // static
ScopeMatches(const GURL & scope,const GURL & url)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
MatchLongest(const GURL & scope)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