cef/include/capi/cef_server_capi.h

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#ifndef CEF_INCLUDE_CAPI_CEF_SERVER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_SERVER_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_callback_capi.h"
#include "include/capi/cef_request_capi.h"
#include "include/capi/cef_task_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

struct _cef_server_handler_t;

///
/// Structure representing a server that supports HTTP and WebSocket requests.
/// Server capacity is limited and is intended to handle only a small number of
/// simultaneous connections (e.g. for communicating between applications on
/// localhost). The functions of this structure are safe to call from any thread
/// in the brower process unless otherwise indicated.
///
typedef struct _cef_server_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Returns the task runner for the dedicated server thread.
  ///
  struct _cef_task_runner_t*(CEF_CALLBACK* get_task_runner)(
      struct _cef_server_t* self);

  ///
  /// Stop the server and shut down the dedicated server thread. See
  /// cef_server_handler_t::OnServerCreated documentation for a description of
  /// server lifespan.
  ///
  void(CEF_CALLBACK* shutdown)(struct _cef_server_t* self);

  ///
  /// Returns true (1) if the server is currently running and accepting incoming
  /// connections. See cef_server_handler_t::OnServerCreated documentation for a
  /// description of server lifespan. This function must be called on the
  /// dedicated server thread.
  ///
  int(CEF_CALLBACK* is_running)(struct _cef_server_t* self);

  ///
  /// Returns the server address including the port number.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_address)(struct _cef_server_t* self);

  ///
  /// Returns true (1) if the server currently has a connection. This function
  /// must be called on the dedicated server thread.
  ///
  int(CEF_CALLBACK* has_connection)(struct _cef_server_t* self);

  ///
  /// Returns true (1) if |connection_id| represents a valid connection. This
  /// function must be called on the dedicated server thread.
  ///
  int(CEF_CALLBACK* is_valid_connection)(struct _cef_server_t* self,
                                         int connection_id);

  ///
  /// Send an HTTP 200 "OK" response to the connection identified by
  /// |connection_id|. |content_type| is the response content type (e.g.
  /// "text/html"), |data| is the response content, and |data_size| is the size
  /// of |data| in bytes. The contents of |data| will be copied. The connection
  /// will be closed automatically after the response is sent.
  ///
  void(CEF_CALLBACK* send_http200response)(struct _cef_server_t* self,
                                           int connection_id,
                                           const cef_string_t* content_type,
                                           const void* data,
                                           size_t data_size);

  ///
  /// Send an HTTP 404 "Not Found" response to the connection identified by
  /// |connection_id|. The connection will be closed automatically after the
  /// response is sent.
  ///
  void(CEF_CALLBACK* send_http404response)(struct _cef_server_t* self,
                                           int connection_id);

  ///
  /// Send an HTTP 500 "Internal Server Error" response to the connection
  /// identified by |connection_id|. |error_message| is the associated error
  /// message. The connection will be closed automatically after the response is
  /// sent.
  ///
  void(CEF_CALLBACK* send_http500response)(struct _cef_server_t* self,
                                           int connection_id,
                                           const cef_string_t* error_message);

  ///
  /// Send a custom HTTP response to the connection identified by
  /// |connection_id|. |response_code| is the HTTP response code sent in the
  /// status line (e.g. 200), |content_type| is the response content type sent
  /// as the "Content-Type" header (e.g. "text/html"), |content_length| is the
  /// expected content length, and |extra_headers| is the map of extra response
  /// headers. If |content_length| is >= 0 then the "Content-Length" header will
  /// be sent. If |content_length| is 0 then no content is expected and the
  /// connection will be closed automatically after the response is sent. If
  /// |content_length| is < 0 then no "Content-Length" header will be sent and
  /// the client will continue reading until the connection is closed. Use the
  /// SendRawData function to send the content, if applicable, and call
  /// CloseConnection after all content has been sent.
  ///
  void(CEF_CALLBACK* send_http_response)(struct _cef_server_t* self,
                                         int connection_id,
                                         int response_code,
                                         const cef_string_t* content_type,
                                         int64_t content_length,
                                         cef_string_multimap_t extra_headers);

  ///
  /// Send raw data directly to the connection identified by |connection_id|.
  /// |data| is the raw data and |data_size| is the size of |data| in bytes. The
  /// contents of |data| will be copied. No validation of |data| is performed
  /// internally so the client should be careful to send the amount indicated by
  /// the "Content-Length" header, if specified. See SendHttpResponse
  /// documentation for intended usage.
  ///
  void(CEF_CALLBACK* send_raw_data)(struct _cef_server_t* self,
                                    int connection_id,
                                    const void* data,
                                    size_t data_size);

  ///
  /// Close the connection identified by |connection_id|. See SendHttpResponse
  /// documentation for intended usage.
  ///
  void(CEF_CALLBACK* close_connection)(struct _cef_server_t* self,
                                       int connection_id);

  ///
  /// Send a WebSocket message to the connection identified by |connection_id|.
  /// |data| is the response content and |data_size| is the size of |data| in
  /// bytes. The contents of |data| will be copied. See
  /// cef_server_handler_t::OnWebSocketRequest documentation for intended usage.
  ///
  void(CEF_CALLBACK* send_web_socket_message)(struct _cef_server_t* self,
                                              int connection_id,
                                              const void* data,
                                              size_t data_size);
} cef_server_t;

///
/// Create a new server that binds to |address| and |port|. |address| must be a
/// valid IPv4 or IPv6 address (e.g. 127.0.0.1 or ::1) and |port| must be a port
/// number outside of the reserved range (e.g. between 1025 and 65535 on most
/// platforms). |backlog| is the maximum number of pending connections. A new
/// thread will be created for each CreateServer call (the "dedicated server
/// thread"). It is therefore recommended to use a different
/// cef_server_handler_t instance for each CreateServer call to avoid thread
/// safety issues in the cef_server_handler_t implementation. The
/// cef_server_handler_t::OnServerCreated function will be called on the
/// dedicated server thread to report success or failure. See
/// cef_server_handler_t::OnServerCreated documentation for a description of
/// server lifespan.
///
CEF_EXPORT void cef_server_create(const cef_string_t* address,
                                  uint16_t port,
                                  int backlog,
                                  struct _cef_server_handler_t* handler);

///
/// Implement this structure to handle HTTP server requests. A new thread will
/// be created for each cef_server_t::CreateServer call (the "dedicated server
/// thread"), and the functions of this structure will be called on that thread.
/// It is therefore recommended to use a different cef_server_handler_t instance
/// for each cef_server_t::CreateServer call to avoid thread safety issues in
/// the cef_server_handler_t implementation.
///
typedef struct _cef_server_handler_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Called when |server| is created. If the server was started successfully
  /// then cef_server_t::IsRunning will return true (1). The server will
  /// continue running until cef_server_t::Shutdown is called, after which time
  /// OnServerDestroyed will be called. If the server failed to start then
  /// OnServerDestroyed will be called immediately after this function returns.
  ///
  void(CEF_CALLBACK* on_server_created)(struct _cef_server_handler_t* self,
                                        struct _cef_server_t* server);

  ///
  /// Called when |server| is destroyed. The server thread will be stopped after
  /// this function returns. The client should release any references to
  /// |server| when this function is called. See OnServerCreated documentation
  /// for a description of server lifespan.
  ///
  void(CEF_CALLBACK* on_server_destroyed)(struct _cef_server_handler_t* self,
                                          struct _cef_server_t* server);

  ///
  /// Called when a client connects to |server|. |connection_id| uniquely
  /// identifies the connection. Each call to this function will have a matching
  /// call to OnClientDisconnected.
  ///
  void(CEF_CALLBACK* on_client_connected)(struct _cef_server_handler_t* self,
                                          struct _cef_server_t* server,
                                          int connection_id);

  ///
  /// Called when a client disconnects from |server|. |connection_id| uniquely
  /// identifies the connection. The client should release any data associated
  /// with |connection_id| when this function is called and |connection_id|
  /// should no longer be passed to cef_server_t functions. Disconnects can
  /// originate from either the client or the server. For example, the server
  /// will disconnect automatically after a cef_server_t::SendHttpXXXResponse
  /// function is called.
  ///
  void(CEF_CALLBACK* on_client_disconnected)(struct _cef_server_handler_t* self,
                                             struct _cef_server_t* server,
                                             int connection_id);

  ///
  /// Called when |server| receives an HTTP request. |connection_id| uniquely
  /// identifies the connection, |client_address| is the requesting IPv4 or IPv6
  /// client address including port number, and |request| contains the request
  /// contents (URL, function, headers and optional POST data). Call
  /// cef_server_t functions either synchronously or asynchronusly to send a
  /// response.
  ///
  void(CEF_CALLBACK* on_http_request)(struct _cef_server_handler_t* self,
                                      struct _cef_server_t* server,
                                      int connection_id,
                                      const cef_string_t* client_address,
                                      struct _cef_request_t* request);

  ///
  /// Called when |server| receives a WebSocket request. |connection_id|
  /// uniquely identifies the connection, |client_address| is the requesting
  /// IPv4 or IPv6 client address including port number, and |request| contains
  /// the request contents (URL, function, headers and optional POST data).
  /// Execute |callback| either synchronously or asynchronously to accept or
  /// decline the WebSocket connection. If the request is accepted then
  /// OnWebSocketConnected will be called after the WebSocket has connected and
  /// incoming messages will be delivered to the OnWebSocketMessage callback. If
  /// the request is declined then the client will be disconnected and
  /// OnClientDisconnected will be called. Call the
  /// cef_server_t::SendWebSocketMessage function after receiving the
  /// OnWebSocketConnected callback to respond with WebSocket messages.
  ///
  void(CEF_CALLBACK* on_web_socket_request)(struct _cef_server_handler_t* self,
                                            struct _cef_server_t* server,
                                            int connection_id,
                                            const cef_string_t* client_address,
                                            struct _cef_request_t* request,
                                            struct _cef_callback_t* callback);

  ///
  /// Called after the client has accepted the WebSocket connection for |server|
  /// and |connection_id| via the OnWebSocketRequest callback. See
  /// OnWebSocketRequest documentation for intended usage.
  ///
  void(CEF_CALLBACK* on_web_socket_connected)(
      struct _cef_server_handler_t* self,
      struct _cef_server_t* server,
      int connection_id);

  ///
  /// Called when |server| receives an WebSocket message. |connection_id|
  /// uniquely identifies the connection, |data| is the message content and
  /// |data_size| is the size of |data| in bytes. Do not keep a reference to
  /// |data| outside of this function. See OnWebSocketRequest documentation for
  /// intended usage.
  ///
  void(CEF_CALLBACK* on_web_socket_message)(struct _cef_server_handler_t* self,
                                            struct _cef_server_t* server,
                                            int connection_id,
                                            const void* data,
                                            size_t data_size);
} cef_server_handler_t;

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_SERVER_CAPI_H_