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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef NGHTTP2_GZIP_H
#define NGHTTP2_GZIP_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* defined(HAVE_CONFIG_H) */
#include <zlib.h>
#include <nghttp2/nghttp2.h>
#ifdef __cplusplus
extern "C" {
#endif /* defined(__cplusplus) */
/**
* @struct
*
* The gzip stream to inflate data.
*/
typedef struct {
z_stream zst;
int8_t finished;
} nghttp2_gzip;
/**
* @function
*
* A helper function to set up a per request gzip stream to inflate
* data.
*
* This function returns 0 if it succeeds, or -1.
*/
int nghttp2_gzip_inflate_new(nghttp2_gzip **inflater_ptr);
/**
* @function
*
* Frees the inflate stream. The |inflater| may be ``NULL``.
*/
void nghttp2_gzip_inflate_del(nghttp2_gzip *inflater);
/**
* @function
*
* Inflates data in |in| with the length |*inlen_ptr| and stores the
* inflated data to |out| which has allocated size at least
* |*outlen_ptr|. On return, |*outlen_ptr| is updated to represent
* the number of data written in |out|. Similarly, |*inlen_ptr| is
* updated to represent the number of input bytes processed.
*
* This function returns 0 if it succeeds, or -1.
*
* The example follows::
*
* void on_data_chunk_recv_callback(nghttp2_session *session,
* uint8_t flags,
* int32_t stream_id,
* const uint8_t *data, size_t len,
* void *user_data)
* {
* ...
* req = nghttp2_session_get_stream_user_data(session, stream_id);
* nghttp2_gzip *inflater = req->inflater;
* while(len > 0) {
* uint8_t out[MAX_OUTLEN];
* size_t outlen = MAX_OUTLEN;
* size_t tlen = len;
* int rv;
* rv = nghttp2_gzip_inflate(inflater, out, &outlen, data, &tlen);
* if(rv != 0) {
* nghttp2_submit_rst_stream(session, stream_id,
* NGHTTP2_INTERNAL_ERROR);
* break;
* }
* ... Do stuff ...
* data += tlen;
* len -= tlen;
* }
* ....
* }
*/
int nghttp2_gzip_inflate(nghttp2_gzip *inflater, uint8_t *out,
size_t *outlen_ptr, const uint8_t *in,
size_t *inlen_ptr);
/**
* @function
*
* Returns nonzero if |inflater| sees the end of deflate stream.
* After this function returns nonzero, `nghttp2_gzip_inflate()` with
* |inflater| gets to return error.
*/
int nghttp2_gzip_inflate_finished(nghttp2_gzip *inflater);
#ifdef __cplusplus
}
#endif /* defined(__cplusplus) */
#endif /* !defined(NGHTTP2_GZIP_H) */