content/common/service_worker/service_worker_utils.h

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_COMMON_SERVICE_WORKER_SERVICE_WORKER_UTILS_H_
#define CONTENT_COMMON_SERVICE_WORKER_SERVICE_WORKER_UTILS_H_

#include "base/command_line.h"
#include "base/macros.h"
#include "content/common/content_export.h"
#include "content/common/service_worker/service_worker_status_code.h"
#include "content/common/service_worker/service_worker_types.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/resource_type.h"
#include "url/gurl.h"

namespace content {

class ServiceWorkerUtils {
 public:
  static bool IsMainResourceType(ResourceType type) {
    return IsResourceTypeFrame(type) || type == RESOURCE_TYPE_SHARED_WORKER;
  }

  // A helper for creating a do-nothing status callback.
  static void NoOpStatusCallback(ServiceWorkerStatusCode status) {}

  // Returns true if |scope| matches |url|.
  CONTENT_EXPORT static bool ScopeMatches(const GURL& scope, const GURL& url);

  // Returns true if the script at |script_url| is allowed to control |scope|
  // according to Service Worker's path restriction policy. If
  // |service_worker_allowed| is not null, it points to the
  // Service-Worker-Allowed header value.
  CONTENT_EXPORT static bool IsPathRestrictionSatisfied(
      const GURL& scope,
      const GURL& script_url,
      const std::string* service_worker_allowed_header_value,
      std::string* error_message);

  static bool ContainsDisallowedCharacter(const GURL& scope,
                                          const GURL& script_url,
                                          std::string* error_message);

  static bool CanRegisterServiceWorker(const GURL& context_url,
                                       const GURL& pattern,
                                       const GURL& script_url);

  // Returns true when '--disable-web-security' flag is set. Otherwise returns
  // whether the all origins of |urls| are same as the origin of |url|.
  template <typename... Args>
  static bool PassOriginEqualitySecurityCheck(const GURL& url,
                                              const Args&... urls) {
    if (base::CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kDisableWebSecurity))
      return true;
    for (const GURL& u : {urls...}) {
      if (url.GetOrigin() != u.GetOrigin())
        return false;
    }
    return true;
  }

  // PlzNavigate
  // Returns true if the |provider_id| was assigned by the browser process.
  static bool IsBrowserAssignedProviderId(int provider_id) {
    return provider_id < kInvalidServiceWorkerProviderId;
  }
};

class CONTENT_EXPORT LongestScopeMatcher {
 public:
  explicit LongestScopeMatcher(const GURL& url) : url_(url) {}
  virtual ~LongestScopeMatcher() {}

  // Returns true if |scope| matches |url_| longer than |match_|.
  bool MatchLongest(const GURL& scope);

 private:
  const GURL url_;
  GURL match_;

  DISALLOW_COPY_AND_ASSIGN(LongestScopeMatcher);
};

}  // namespace content

#endif  // CONTENT_COMMON_SERVICE_WORKER_SERVICE_WORKER_UTILS_H_