text: /*
   * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #pragma once
  
  #include <AK/Function.h>
  #include <AK/URL.h>
  #include <LibCore/Object.h>
  
  namespace Protocol {
  class Client;
  }
  
  namespace Web {
  
  class ResourceLoader : public Core::Object {
      C_OBJECT(ResourceLoader)
  public:
      static ResourceLoader& the();
  
      void load(const URL&, Function<void(const ByteBuffer&, const HashMap<String, String>& response_headers)> success_callback, Function<void(const String&)> error_callback = nullptr);
      void load_sync(const URL&, Function<void(const ByteBuffer&, const HashMap<String, String>& response_headers)> success_callback, Function<void(const String&)> error_callback = nullptr);
  
      Function<void()> on_load_counter_change;
  
      int pending_loads() const { return m_pending_loads; }
  
  private:
      ResourceLoader();
  
      int m_pending_loads { 0 };
  
      Protocol::Client& protocol_client() { return *m_protocol_client; }
      RefPtr<Protocol::Client> m_protocol_client;
      bool is_port_blocked(int port);
  };
  
  }
  