extensions/browser/api/web_request/web_request_permissions.h

// Copyright (c) 2012 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 EXTENSIONS_BROWSER_API_WEB_REQUEST_WEB_REQUEST_PERMISSIONS_H_
#define EXTENSIONS_BROWSER_API_WEB_REQUEST_WEB_REQUEST_PERMISSIONS_H_

#include <map>
#include <string>

#include "base/macros.h"
#include "base/optional.h"
#include "extensions/common/permissions/permissions_data.h"
#include "url/origin.h"

class GURL;

namespace extensions {
class InfoMap;
struct WebRequestInfo;
}

// This class is used to test whether extensions may modify web requests. It
// should be used on the IO thread.
class WebRequestPermissions {
 public:
  // Different host permission checking modes for CanExtensionAccessURL.
  enum HostPermissionsCheck {
    DO_NOT_CHECK_HOST = 0,            // No check.
    REQUIRE_HOST_PERMISSION_FOR_URL,  // Permission needed for given request
                                      // URL.
    REQUIRE_HOST_PERMISSION_FOR_URL_AND_INITIATOR,  // Permission needed for
                                                    // given request URL and its
                                                    // initiator.
    REQUIRE_ALL_URLS  // Permission needed for <all_urls>.
  };

  // Returns true if the request shall not be reported to extensions.
  static bool HideRequest(const extensions::InfoMap* extension_info_map,
                          const extensions::WebRequestInfo& request);

  // Helper function used only in tests, sets a variable which enables or
  // disables a CHECK.
  static void AllowAllExtensionLocationsInPublicSessionForTesting(bool value);

  // |host_permission_check| controls how permissions are checked with regard to
  // |url| and |initiator| if an initiator exists.
  static extensions::PermissionsData::PageAccess CanExtensionAccessURL(
      const extensions::InfoMap* extension_info_map,
      const std::string& extension_id,
      const GURL& url,
      int tab_id,
      bool crosses_incognito,
      HostPermissionsCheck host_permissions_check,
      const base::Optional<url::Origin>& initiator);

  static bool CanExtensionAccessInitiator(
      const extensions::InfoMap* extension_info_map,
      const extensions::ExtensionId extension_id,
      const base::Optional<url::Origin>& initiator,
      int tab_id,
      bool crosses_incognito);

  DISALLOW_IMPLICIT_CONSTRUCTORS(WebRequestPermissions);
};

#endif  // EXTENSIONS_BROWSER_API_WEB_REQUEST_WEB_REQUEST_PERMISSIONS_H_