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