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88 lines
2.9 KiB
88 lines
2.9 KiB
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* This is included from private-lib-core.h if LWS_WITH_HTTP_STREAM_COMPRESSION
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*/
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#if defined(LWS_WITH_MINIZ)
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#include <miniz.h>
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#else
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#include <zlib.h>
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#endif
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#if defined(LWS_WITH_HTTP_BROTLI)
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#include <brotli/encode.h>
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#include <brotli/decode.h>
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#endif
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/*
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* struct holding union of all the available compression methods' context data,
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* and state if it's compressing or decompressing
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*/
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typedef struct lws_compression_ctx {
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union {
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#if defined(LWS_WITH_HTTP_BROTLI)
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BrotliEncoderState *br_en;
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BrotliDecoderState *br_de;
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#endif
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z_stream *deflate;
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void *generic_ctx_ptr;
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} u;
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struct lws_buflist *buflist_comp;
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unsigned int is_decompression:1;
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unsigned int final_on_input_side:1;
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unsigned int may_have_more:1;
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unsigned int chunking:1;
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} lws_comp_ctx_t;
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/* generic structure defining the interface to a compression method */
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struct lws_compression_support {
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/** compression name as used by, eg, content-ecoding */
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const char *encoding_name;
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/** create a compression context for the compression method, or NULL */
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int (*init_compression)(lws_comp_ctx_t *ctx, int decomp);
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/** pass data into the context to be processed */
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int (*process)(lws_comp_ctx_t *ctx, const void *in, size_t *ilen_iused,
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void *out, size_t *olen_oused);
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/** destroy the de/compression context */
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void (*destroy)(lws_comp_ctx_t *ctx);
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};
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extern struct lws_compression_support lcs_deflate;
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extern struct lws_compression_support lcs_brotli;
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int
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lws_http_compression_validate(struct lws *wsi);
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int
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lws_http_compression_transform(struct lws *wsi, unsigned char *buf,
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size_t len, enum lws_write_protocol *wp,
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unsigned char **outbuf, size_t *olen_oused);
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void
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lws_http_compression_destroy(struct lws *wsi);
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