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ead43fe4f2
Add code so that compression can be used for requests as well. New compression keywords are introduced : "direction" that specifies what we want to compress. Valid values are "request", "response", or "both". "type-req" and "type-res" define content-type to be compressed for requests and responses, respectively. "type" is kept as an alias for "type-res" for backward compatibilty. "algo-req" specifies the compression algorithm to be used for requests. Only one algorithm can be provided. "algo-res" provides the list of algorithm that can be used to compress responses. "algo" is kept as an alias for "algo-res" for backward compatibility.
110 lines
3.2 KiB
C
110 lines
3.2 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 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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