crccache/mod_crccache_client.h

   1 /*
   2  * mod_crccache_client.h
   3  *
   4  *  Created on: 15/03/2009
   5  *      Author: awulms
   6  */
   7
   8 #ifndef MOD_CRCCACHE_CLIENT_H
   9 #define MOD_CRCCACHE_CLIENT_H
  10
  11 #include "cache/cache.h"
  12 #include <zlib.h>
  13 #include <ap_config.h>
  14 #include <http_config.h>
  15 #include <apr_optional.h>
  16 #include <apr_sha1.h>
  17
  18 extern module AP_MODULE_DECLARE_DATA crccache_client_module;
  19
  20 const char* cache_create_key( request_rec*r );
  21
  22 APR_DECLARE_OPTIONAL_FN(apr_status_t,
  23                         ap_cache_generate_key,
  24                         (request_rec *r, apr_pool_t*p, char**key ));
  25
  26 extern APR_OPTIONAL_FN_TYPE(ap_cache_generate_key) *cache_generate_key;
  27
  28
  29 // hashes per file
  30 #define FULL_BLOCK_COUNT 40
  31
  32 typedef enum decoding_state {
  33         DECODING_NEW_SECTION,
  34         DECODING_COMPRESSED,
  35         DECODING_LITERAL_BODY,
  36         DECODING_LITERAL_SIZE,
  37         DECODING_HASH,
  38         DECODING_BLOCK_HEADER,
  39         DECODING_BLOCK
  40 } decoding_state;
  41
  42 typedef enum {
  43         DECOMPRESSION_INITIALIZED,
  44         DECOMPRESSION_ENDED
  45 } decompression_state_t;
  46
  47 typedef struct crccache_client_ctx_t {
  48         apr_bucket_brigade *bb;
  49         size_t block_size;
  50         size_t tail_block_size;
  51         apr_bucket * cached_bucket;// original data so we can fill in the matched blocks
  52
  53         decoding_state state;
  54         decompression_state_t decompression_state;
  55         z_stream *decompression_stream;
  56         int headers_checked;
  57         struct apr_sha1_ctx_t sha1_ctx;
  58         unsigned char sha1_value_rx[APR_SHA1_DIGESTSIZE];
  59         unsigned rx_count;
  60         unsigned literal_size;
  61         unsigned char * partial_literal;// original data so we can fill in the matched blocks
  62 } crccache_client_ctx;
  63
  64 struct cache_enable {
  65     apr_uri_t url;
  66     const char *type;
  67     apr_size_t pathlen;
  68 };
  69
  70 struct cache_disable {
  71     apr_uri_t url;
  72     apr_size_t pathlen;
  73 };
  74
  75 /* static information about the local cache */
  76 typedef struct {
  77         // from mod cache
  78     apr_array_header_t *cacheenable;    /* URLs to cache */
  79     apr_array_header_t *cachedisable;   /* URLs not to cache */
  80
  81     // from mod diskcache
  82     const char* cache_root;
  83     apr_size_t cache_root_len;
  84     int dirlevels;               /* Number of levels of subdirectories */
  85     int dirlength;               /* Length of subdirectory names */
  86     apr_off_t minfs;             /* minimum file size for cached files */
  87     apr_off_t maxfs;             /* maximum file size for cached files */
  88 } crccache_client_conf;
  89
  90 #endif /*MOD_CRCCACHE_CLIENT_H*/
  91