cef/include/capi/cef_response_filter_capi.h

// Copyright (c) 2017 Marshall A. Greenblatt. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
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// ---------------------------------------------------------------------------
//
// This file was generated by the CEF translator tool and should not edited
// by hand. See the translator.README.txt file in the tools directory for
// more information.
//

#ifndef CEF_INCLUDE_CAPI_CEF_RESPONSE_FILTER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_RESPONSE_FILTER_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"

#ifdef __cplusplus
extern "C" {
#endif


///
// Implement this structure to filter resource response content. The functions
// of this structure will be called on the browser process IO thread.
///
typedef struct _cef_response_filter_t {
  ///
  // Base structure.
  ///
  cef_base_t base;

  ///
  // Initialize the response filter. Will only be called a single time. The
  // filter will not be installed if this function returns false (0).
  ///
  int (CEF_CALLBACK *init_filter)(struct _cef_response_filter_t* self);

  ///
  // Called to filter a chunk of data. Expected usage is as follows:
  //
  //  A. Read input data from |data_in| and set |data_in_read| to the number of
  //     bytes that were read up to a maximum of |data_in_size|. |data_in| will
  //     be NULL if |data_in_size| is zero.
  //  B. Write filtered output data to |data_out| and set |data_out_written| to
  //     the number of bytes that were written up to a maximum of
  //     |data_out_size|. If no output data was written then all data must be
  //     read from |data_in| (user must set |data_in_read| = |data_in_size|).
  //  C. Return RESPONSE_FILTER_DONE if all output data was written or
  //     RESPONSE_FILTER_NEED_MORE_DATA if output data is still pending.
  //
  // This function will be called repeatedly until the input buffer has been
  // fully read (user sets |data_in_read| = |data_in_size|) and there is no more
  // input data to filter (the resource response is complete). This function may
  // then be called an additional time with an NULL input buffer if the user
  // filled the output buffer (set |data_out_written| = |data_out_size|) and
  // returned RESPONSE_FILTER_NEED_MORE_DATA to indicate that output data is
  // still pending.
  //
  // Calls to this function will stop when one of the following conditions is
  // met:
  //
  //  A. There is no more input data to filter (the resource response is
  //     complete) and the user sets |data_out_written| = 0 or returns
  //     RESPONSE_FILTER_DONE to indicate that all data has been written, or;
  //  B. The user returns RESPONSE_FILTER_ERROR to indicate an error.
  //
  // Do not keep a reference to the buffers passed to this function.
  ///
  cef_response_filter_status_t (CEF_CALLBACK *filter)(
      struct _cef_response_filter_t* self, void* data_in, size_t data_in_size,
      size_t* data_in_read, void* data_out, size_t data_out_size,
      size_t* data_out_written);
} cef_response_filter_t;


#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_RESPONSE_FILTER_CAPI_H_