#include "httpd.h"
#include "http_config.h"
#include "http_log.h"
#include "http_core.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_general.h"
#include "util_filter.h"
#include "apr_buckets.h"
#include "http_protocol.h"
#include "http_request.h"
#include "http_ssl.h"
#include "apr_want.h"
#include "zlib.h"

Classes
struct	deflate_filter_config_t

struct	deflate_dirconf_t

struct	deflate_ctx_t

Macros
#define	ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */

#define	HEAD_CRC 0x02 /* bit 1 set: header CRC present */

#define	EXTRA_FIELD 0x04 /* bit 2 set: extra field present */

#define	ORIG_NAME 0x08 /* bit 3 set: original file name present */

#define	COMMENT 0x10 /* bit 4 set: file comment present */

#define	RESERVED 0xE0 /* bits 5..7: reserved */

#define	APR_WANT_STRFUNC

#define	AP_INFLATE_RATIO_LIMIT 200

#define	AP_INFLATE_RATIO_BURST 3

#define	AP_DEFLATE_ETAG_ADDSUFFIX 0

#define	AP_DEFLATE_ETAG_NOCHANGE 1

#define	AP_DEFLATE_ETAG_REMOVE 2

#define	DEFAULT_COMPRESSION Z_DEFAULT_COMPRESSION

#define	DEFAULT_WINDOWSIZE -15

#define	DEFAULT_MEMLEVEL 9

#define	DEFAULT_BUFFERSIZE 8096

#define	VALIDATION_SIZE 8

#define	NO_UPDATE_CRC 0

#define	UPDATE_CRC 1

#define	PROTO_FLAGS AP_FILTER_PROTO_CHANGE\|AP_FILTER_PROTO_CHANGE_LENGTH

Typedefs
typedef struct deflate_filter_config_t	deflate_filter_config

typedef struct deflate_dirconf_t	deflate_dirconf_t

typedef struct deflate_ctx_t	deflate_ctx

Functions
static int	check_gzip (request_rec r, apr_table_t hdrs1, apr_table_t *hdrs2)

static void	putLong (unsigned char *string, unsigned long x)

static unsigned long	getLong (unsigned char *string)

static void *	create_deflate_server_config (apr_pool_t p, server_rec s)

static void *	create_deflate_dirconf (apr_pool_t p, char dummy)

static const char *	deflate_set_window_size (cmd_parms cmd, void dummy, const char *arg)

static const char *	deflate_set_buffer_size (cmd_parms cmd, void dummy, const char *arg)

static const char *	deflate_set_note (cmd_parms cmd, void dummy, const char arg1, const char arg2)

static const char *	deflate_set_memlevel (cmd_parms cmd, void dummy, const char *arg)

static const char *	deflate_set_etag (cmd_parms cmd, void dummy, const char *arg)

static const char *	deflate_set_compressionlevel (cmd_parms cmd, void dummy, const char *arg)

static const char *	deflate_set_inflate_limit (cmd_parms cmd, void dirconf, const char *arg)

static const char *	deflate_set_inflate_ratio_limit (cmd_parms cmd, void dirconf, const char *arg)

static const char *	deflate_set_inflate_ratio_burst (cmd_parms cmd, void dirconf, const char *arg)

static void	consume_buffer (deflate_ctx ctx, deflate_filter_config c, int len, int crc, apr_bucket_brigade *bb)

static int	flush_libz_buffer (deflate_ctx ctx, deflate_filter_config c, int(*libz_func)(z_streamp, int), int flush, int crc)

static apr_status_t	deflate_ctx_cleanup (void *data)

static void	deflate_check_etag (request_rec r, const char transform, int etag_opt)

static int	check_ratio (request_rec r, deflate_ctx ctx, const deflate_dirconf_t *dc)

static int	have_ssl_compression (request_rec *r)

static apr_status_t	deflate_out_filter (ap_filter_t f, apr_bucket_brigade bb)

static apr_status_t	consume_zlib_flags (deflate_ctx ctx, const char data, apr_size_t len)

static apr_status_t	deflate_in_filter (ap_filter_t f, apr_bucket_brigade bb, ap_input_mode_t mode, apr_read_type_e block, apr_off_t readbytes)

static apr_status_t	inflate_out_filter (ap_filter_t f, apr_bucket_brigade bb)

static int	mod_deflate_post_config (apr_pool_t pconf, apr_pool_t plog, apr_pool_t ptemp, server_rec s)

static void	register_hooks (apr_pool_t *p)

Variables
static const char	deflateFilterName [] = "DEFLATE"

static const char	gzip_header [10]

static const char	deflate_magic [2] = { '\037', '\213' }

static const command_rec	deflate_filter_cmds []

static int *const	aplog_module_index = &( deflate_module.module_index)

Macro Definition Documentation

◆ AP_DEFLATE_ETAG_ADDSUFFIX

#define AP_DEFLATE_ETAG_ADDSUFFIX 0

Definition at line 60 of file mod_deflate.c.

◆ AP_DEFLATE_ETAG_NOCHANGE

#define AP_DEFLATE_ETAG_NOCHANGE 1

Definition at line 61 of file mod_deflate.c.

◆ AP_DEFLATE_ETAG_REMOVE

#define AP_DEFLATE_ETAG_REMOVE 2

Definition at line 62 of file mod_deflate.c.

◆ AP_INFLATE_RATIO_BURST

#define AP_INFLATE_RATIO_BURST 3

Definition at line 58 of file mod_deflate.c.

◆ AP_INFLATE_RATIO_LIMIT

#define AP_INFLATE_RATIO_LIMIT 200

Definition at line 57 of file mod_deflate.c.

◆ APR_WANT_STRFUNC

#define APR_WANT_STRFUNC

Definition at line 49 of file mod_deflate.c.

◆ ASCII_FLAG

#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */

Definition at line 29 of file mod_deflate.c.

◆ COMMENT

#define COMMENT 0x10 /* bit 4 set: file comment present */

Definition at line 33 of file mod_deflate.c.

◆ DEFAULT_BUFFERSIZE

#define DEFAULT_BUFFERSIZE 8096

Definition at line 101 of file mod_deflate.c.

◆ DEFAULT_COMPRESSION

#define DEFAULT_COMPRESSION Z_DEFAULT_COMPRESSION

Definition at line 98 of file mod_deflate.c.

◆ DEFAULT_MEMLEVEL

#define DEFAULT_MEMLEVEL 9

Definition at line 100 of file mod_deflate.c.

◆ DEFAULT_WINDOWSIZE

#define DEFAULT_WINDOWSIZE -15

Definition at line 99 of file mod_deflate.c.

◆ EXTRA_FIELD

#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */

Definition at line 31 of file mod_deflate.c.

◆ HEAD_CRC

#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */

Definition at line 30 of file mod_deflate.c.

◆ NO_UPDATE_CRC

#define NO_UPDATE_CRC 0

Definition at line 415 of file mod_deflate.c.

◆ ORIG_NAME

#define ORIG_NAME 0x08 /* bit 3 set: original file name present */

Definition at line 32 of file mod_deflate.c.

◆ PROTO_FLAGS

#define PROTO_FLAGS AP_FILTER_PROTO_CHANGE|AP_FILTER_PROTO_CHANGE_LENGTH

Definition at line 1908 of file mod_deflate.c.

◆ RESERVED

#define RESERVED 0xE0 /* bits 5..7: reserved */

Definition at line 34 of file mod_deflate.c.

◆ UPDATE_CRC

#define UPDATE_CRC 1

Definition at line 417 of file mod_deflate.c.

◆ VALIDATION_SIZE

#define VALIDATION_SIZE 8

Definition at line 413 of file mod_deflate.c.

Typedef Documentation

◆ deflate_ctx

typedef struct deflate_ctx_t deflate_ctx

◆ deflate_dirconf_t

typedef struct deflate_dirconf_t deflate_dirconf_t

◆ deflate_filter_config

typedef struct deflate_filter_config_t deflate_filter_config

Function Documentation

◆ check_gzip()

static int check_gzip	(	request_rec *	r,
		apr_table_t *	hdrs1,
		apr_table_t *	hdrs2
	)

static

Definition at line 107 of file mod_deflate.c.

◆ check_ratio()

static int check_ratio	(	request_rec *	r,
		deflate_ctx *	ctx,
		const deflate_dirconf_t *	dc
	)

static

Definition at line 536 of file mod_deflate.c.

◆ consume_buffer()

static void consume_buffer	(	deflate_ctx *	ctx,
		deflate_filter_config *	c,
		int	len,
		int	crc,
		apr_bucket_brigade *	bb
	)

static

Definition at line 419 of file mod_deflate.c.

◆ consume_zlib_flags()

static apr_status_t consume_zlib_flags	(	deflate_ctx *	ctx,
		const char **	data,
		apr_size_t *	len
	)

static

Definition at line 1047 of file mod_deflate.c.

◆ create_deflate_dirconf()

static void * create_deflate_dirconf	(	apr_pool_t *	p,
		char *	dummy
	)

static

Definition at line 221 of file mod_deflate.c.

◆ create_deflate_server_config()

static void * create_deflate_server_config	(	apr_pool_t *	p,
		server_rec *	s
	)

static

Definition at line 209 of file mod_deflate.c.

◆ deflate_check_etag()

static void deflate_check_etag	(	request_rec *	r,
		const char *	transform,
		int	etag_opt
	)

static

Definition at line 500 of file mod_deflate.c.

◆ deflate_ctx_cleanup()

static apr_status_t deflate_ctx_cleanup ( void * data )

static

Definition at line 485 of file mod_deflate.c.

◆ deflate_in_filter()

static apr_status_t deflate_in_filter	(	ap_filter_t *	f,
		apr_bucket_brigade *	bb,
		ap_input_mode_t	mode,
		apr_read_type_e	block,
		apr_off_t	readbytes
	)

static

Definition at line 1138 of file mod_deflate.c.

◆ deflate_out_filter()

static apr_status_t deflate_out_filter	(	ap_filter_t *	f,
		apr_bucket_brigade *	bb
	)

static

Definition at line 561 of file mod_deflate.c.

◆ deflate_set_buffer_size()

static const char * deflate_set_buffer_size	(	cmd_parms *	cmd,
		void *	dummy,
		const char *	arg
	)

static

Definition at line 246 of file mod_deflate.c.

◆ deflate_set_compressionlevel()

static const char * deflate_set_compressionlevel	(	cmd_parms *	cmd,
		void *	dummy,
		const char *	arg
	)

static

Definition at line 326 of file mod_deflate.c.

◆ deflate_set_etag()

static const char * deflate_set_etag	(	cmd_parms *	cmd,
		void *	dummy,
		const char *	arg
	)

static

Definition at line 303 of file mod_deflate.c.

◆ deflate_set_inflate_limit()

static const char * deflate_set_inflate_limit	(	cmd_parms *	cmd,
		void *	dirconf,
		const char *	arg
	)

static

Definition at line 344 of file mod_deflate.c.

◆ deflate_set_inflate_ratio_burst()

static const char * deflate_set_inflate_ratio_burst	(	cmd_parms *	cmd,
		void *	dirconf,
		const char *	arg
	)

static

Definition at line 376 of file mod_deflate.c.

◆ deflate_set_inflate_ratio_limit()

static const char * deflate_set_inflate_ratio_limit	(	cmd_parms *	cmd,
		void *	dirconf,
		const char *	arg
	)

static

Definition at line 360 of file mod_deflate.c.

◆ deflate_set_memlevel()

static const char * deflate_set_memlevel	(	cmd_parms *	cmd,
		void *	dummy,
		const char *	arg
	)

static

Definition at line 286 of file mod_deflate.c.

◆ deflate_set_note()

static const char * deflate_set_note	(	cmd_parms *	cmd,
		void *	dummy,
		const char *	arg1,
		const char *	arg2
	)

static

Definition at line 261 of file mod_deflate.c.

◆ deflate_set_window_size()

static const char * deflate_set_window_size	(	cmd_parms *	cmd,
		void *	dummy,
		const char *	arg
	)

static

Definition at line 229 of file mod_deflate.c.

◆ flush_libz_buffer()

static int flush_libz_buffer	(	deflate_ctx *	ctx,
		deflate_filter_config *	c,
		int(*)(z_streamp, int)	libz_func,
		int	flush,
		int	crc
	)

static

Definition at line 441 of file mod_deflate.c.

◆ getLong()

static unsigned long getLong ( unsigned char * string )

static

Definition at line 201 of file mod_deflate.c.

◆ have_ssl_compression()

static int have_ssl_compression ( request_rec * r )

static

Definition at line 551 of file mod_deflate.c.

◆ inflate_out_filter()

static apr_status_t inflate_out_filter	(	ap_filter_t *	f,
		apr_bucket_brigade *	bb
	)

static

Definition at line 1542 of file mod_deflate.c.

◆ mod_deflate_post_config()

static int mod_deflate_post_config	(	apr_pool_t *	pconf,
		apr_pool_t *	plog,
		apr_pool_t *	ptemp,
		server_rec *	s
	)

static

< Module has handled this stage.

Definition at line 1901 of file mod_deflate.c.

◆ putLong()

static void putLong	(	unsigned char *	string,
		unsigned long	x
	)

static

Definition at line 191 of file mod_deflate.c.

◆ register_hooks()

static void register_hooks ( apr_pool_t * p )

static

Definition at line 1909 of file mod_deflate.c.

Variable Documentation

◆ aplog_module_index

int* const aplog_module_index = &( deflate_module.module_index)

static

Definition at line 1945 of file mod_deflate.c.

◆ deflate_filter_cmds

const command_rec deflate_filter_cmds[]

static

Initial value:

= {
    
{  "DeflateFilterNote" ,  deflate_set_note ,  NULL ,   128   , TAKE12,  "Set a note to report on compression ratio"  },
    
{  "DeflateWindowSize" ,  deflate_set_window_size ,  NULL ,   128   , TAKE1,  "Set the Deflate window size (1-15)"  },
    
{  "DeflateBufferSize" ,  deflate_set_buffer_size ,  NULL ,   128   , TAKE1,  "Set the Deflate Buffer Size"  },
    
{  "DeflateMemLevel" ,  deflate_set_memlevel ,  NULL ,   128   , TAKE1,  "Set the Deflate Memory Level (1-9)"  },
    
{  "DeflateCompressionLevel" ,  deflate_set_compressionlevel ,  NULL ,   128   , TAKE1,  "Set the Deflate Compression Level (1-9)"  },
    
{  "DeflateInflateLimitRequestBody" ,  deflate_set_inflate_limit ,  NULL ,   ( 1  | 2  | 4  | 8  | 16  )  , TAKE1,  "Set a limit on size of inflated input"  },
    
{  "DeflateInflateRatioLimit" ,  deflate_set_inflate_ratio_limit ,  NULL ,   ( 1  | 2  | 4  | 8  | 16  )  , TAKE1,  "Set the inflate ratio limit above which inflation is "                   "aborted (default: " "200" ")"  },
    
{  "DeflateInflateRatioBurst" ,  deflate_set_inflate_ratio_burst ,  NULL ,   ( 1  | 2  | 4  | 8  | 16  )  , TAKE1,  "Set the maximum number of following inflate ratios above limit "                   "(default: " "3" ")"  },
   
{  "DeflateAlterEtag" ,  deflate_set_etag ,  NULL ,   128   , TAKE1,  "Set how mod_deflate should modify ETAG response headers: 'AddSuffix' (default), 'NoChange' (2.2.x behavior), 'Remove'"  },
 
    {NULL}
}

Definition at line 1920 of file mod_deflate.c.

◆ deflate_magic

const char deflate_magic[2] = { '\037', '\213' }

static

Definition at line 95 of file mod_deflate.c.

◆ deflateFilterName

const char deflateFilterName[] = "DEFLATE"

static

Definition at line 54 of file mod_deflate.c.

◆ gzip_header

const char gzip_header[10]

static

Initial value:

=
{ '\037', '\213', Z_DEFLATED, 0,
  0, 0, 0, 0, 
  0, 0x03 
}

Definition at line 88 of file mod_deflate.c.

Classes

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ AP_DEFLATE_ETAG_ADDSUFFIX

◆ AP_DEFLATE_ETAG_NOCHANGE

◆ AP_DEFLATE_ETAG_REMOVE

◆ AP_INFLATE_RATIO_BURST

◆ AP_INFLATE_RATIO_LIMIT

◆ APR_WANT_STRFUNC

◆ ASCII_FLAG

◆ COMMENT

◆ DEFAULT_BUFFERSIZE

◆ DEFAULT_COMPRESSION

◆ DEFAULT_MEMLEVEL

◆ DEFAULT_WINDOWSIZE

◆ EXTRA_FIELD

◆ HEAD_CRC

◆ NO_UPDATE_CRC

◆ ORIG_NAME

◆ PROTO_FLAGS

◆ RESERVED

◆ UPDATE_CRC

◆ VALIDATION_SIZE

Typedef Documentation

◆ deflate_ctx

◆ deflate_dirconf_t

◆ deflate_filter_config

Function Documentation

◆ check_gzip()

◆ check_ratio()

◆ consume_buffer()

◆ consume_zlib_flags()

◆ create_deflate_dirconf()

◆ create_deflate_server_config()

◆ deflate_check_etag()

◆ deflate_ctx_cleanup()

◆ deflate_in_filter()

◆ deflate_out_filter()

◆ deflate_set_buffer_size()

◆ deflate_set_compressionlevel()

◆ deflate_set_etag()

◆ deflate_set_inflate_limit()

◆ deflate_set_inflate_ratio_burst()

◆ deflate_set_inflate_ratio_limit()

◆ deflate_set_memlevel()

◆ deflate_set_note()

◆ deflate_set_window_size()

◆ flush_libz_buffer()

◆ getLong()

◆ have_ssl_compression()

◆ inflate_out_filter()

◆ mod_deflate_post_config()

◆ putLong()

◆ register_hooks()

Variable Documentation

◆ aplog_module_index

◆ deflate_filter_cmds

◆ deflate_magic

◆ deflateFilterName

◆ gzip_header