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9011b3621b
This is the introduction of "minsize-req" and "minsize-res". These two options allow you to set the minimum payload size required for compression to be applied. This helps save CPU on both server and client sides when the payload does not need to be compressed.
112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/*
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* include/haproxy/compression-t.h
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* This file defines everything related to compression.
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*
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* Copyright 2012 Exceliance, David Du Colombier <dducolombier@exceliance.fr>
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William Lallemand <wlallemand@exceliance.fr>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_COMP_T_H
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#define _HAPROXY_COMP_T_H
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#if defined(USE_SLZ)
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#ifdef USE_ZLIB
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#error "Cannot build with both USE_SLZ and USE_ZLIB at the same time."
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#endif
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#include <import/slz.h>
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#elif defined(USE_ZLIB)
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#include <zlib.h>
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#endif
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#include <haproxy/buf-t.h>
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/* Direction index */
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#define COMP_DIR_REQ 0
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#define COMP_DIR_RES 1
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/* Compression flags */
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#define COMP_FL_OFFLOAD 0x00000001 /* Compression offload */
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#define COMP_FL_DIR_REQ 0x00000002 /* Compress requests */
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#define COMP_FL_DIR_RES 0x00000004 /* Compress responses */
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struct comp {
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struct comp_algo *algos_res; /* Algos available for response */
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struct comp_algo *algo_req; /* Algo to use for request */
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struct comp_type *types_req; /* Types to be compressed for requests */
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struct comp_type *types_res; /* Types to be compressed for responses */
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unsigned int minsize_res; /* Min response body size to be compressed */
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unsigned int minsize_req; /* Min request body size to be compressed */
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unsigned int flags;
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};
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struct comp_ctx {
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#if defined(USE_SLZ)
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struct slz_stream strm;
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const void *direct_ptr; /* NULL or pointer to beginning of data */
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int direct_len; /* length of direct_ptr if not NULL */
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struct buffer queued; /* if not NULL, data already queued */
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#elif defined(USE_ZLIB)
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z_stream strm; /* zlib stream */
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void *zlib_deflate_state;
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void *zlib_window;
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void *zlib_prev;
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void *zlib_pending_buf;
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void *zlib_head;
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#endif
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int cur_lvl;
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};
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/* Thanks to MSIE/IIS, the "deflate" name is ambiguous, as according to the RFC
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* it's a zlib-wrapped deflate stream, but MSIE only understands a raw deflate
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* stream. For this reason some people prefer to emit a raw deflate stream on
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* "deflate" and we'll need two algos for the same name, they are distinguished
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* with the config name.
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*/
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struct comp_algo {
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char *cfg_name; /* config name */
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int cfg_name_len;
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char *ua_name; /* name for the user-agent */
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int ua_name_len;
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int (*init)(struct comp_ctx **comp_ctx, int level);
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int (*add_data)(struct comp_ctx *comp_ctx, const char *in_data, int in_len, struct buffer *out);
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int (*flush)(struct comp_ctx *comp_ctx, struct buffer *out);
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int (*finish)(struct comp_ctx *comp_ctx, struct buffer *out);
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int (*end)(struct comp_ctx **comp_ctx);
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struct comp_algo *next;
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};
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struct comp_type {
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char *name;
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int name_len;
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struct comp_type *next;
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};
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#endif /* _HAPROXY_COMP_T_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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