Mercurial > hg > nginx
annotate src/core/ngx_hash.h @ 9306:e46e1ea89ccd default tip
Upstream: $upstream_cache_age variable.
The variable reflects response age, including the time spent in the
cache and the upstream response age as obtained from the "Age" header.
If the response wasn't cached, the variable reflects the "Age" header
of the upstream response.
If the intended use case is to cache responses as per HTTP/1.1 caching
model, the $upstream_cache_age variable can be used to provide the "Age"
header with the "add_header" directive, such as:
add_header Age $upstream_cache_age;
This now removes the "Age" header if it was present.
Further, the "expires" directives now removes the "Age" header if it
was present in the response, as the "expires" directive assumes zero
age when it adds "Expires" and "Cache-Control" headers.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Thu, 18 Jul 2024 19:39:45 +0300 |
parents | f8f6b9fee66a |
children |
rev | line source |
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507 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
507 | 5 */ |
6 | |
7 | |
8 #ifndef _NGX_HASH_H_INCLUDED_ | |
9 #define _NGX_HASH_H_INCLUDED_ | |
10 | |
11 | |
12 #include <ngx_config.h> | |
13 #include <ngx_core.h> | |
14 | |
15 | |
16 typedef struct { | |
589 | 17 void *value; |
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18 u_short len; |
589 | 19 u_char name[1]; |
20 } ngx_hash_elt_t; | |
507 | 21 |
589 | 22 |
23 typedef struct { | |
24 ngx_hash_elt_t **buckets; | |
25 ngx_uint_t size; | |
507 | 26 } ngx_hash_t; |
27 | |
28 | |
29 typedef struct { | |
589 | 30 ngx_hash_t hash; |
31 void *value; | |
32 } ngx_hash_wildcard_t; | |
33 | |
34 | |
35 typedef struct { | |
36 ngx_str_t key; | |
37 ngx_uint_t key_hash; | |
38 void *value; | |
39 } ngx_hash_key_t; | |
40 | |
41 | |
42 typedef ngx_uint_t (*ngx_hash_key_pt) (u_char *data, size_t len); | |
43 | |
44 | |
45 typedef struct { | |
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46 ngx_hash_t hash; |
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47 ngx_hash_wildcard_t *wc_head; |
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48 ngx_hash_wildcard_t *wc_tail; |
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49 } ngx_hash_combined_t; |
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50 |
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51 |
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52 typedef struct { |
589 | 53 ngx_hash_t *hash; |
54 ngx_hash_key_pt key; | |
55 | |
56 ngx_uint_t max_size; | |
57 ngx_uint_t bucket_size; | |
58 | |
59 char *name; | |
60 ngx_pool_t *pool; | |
61 ngx_pool_t *temp_pool; | |
62 } ngx_hash_init_t; | |
63 | |
64 | |
593 | 65 #define NGX_HASH_SMALL 1 |
66 #define NGX_HASH_LARGE 2 | |
67 | |
68 #define NGX_HASH_LARGE_ASIZE 16384 | |
69 #define NGX_HASH_LARGE_HSIZE 10007 | |
70 | |
71 #define NGX_HASH_WILDCARD_KEY 1 | |
597 | 72 #define NGX_HASH_READONLY_KEY 2 |
593 | 73 |
74 | |
75 typedef struct { | |
76 ngx_uint_t hsize; | |
77 | |
78 ngx_pool_t *pool; | |
79 ngx_pool_t *temp_pool; | |
80 | |
81 ngx_array_t keys; | |
82 ngx_array_t *keys_hash; | |
83 | |
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84 ngx_array_t dns_wc_head; |
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85 ngx_array_t *dns_wc_head_hash; |
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86 |
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87 ngx_array_t dns_wc_tail; |
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88 ngx_array_t *dns_wc_tail_hash; |
593 | 89 } ngx_hash_keys_arrays_t; |
90 | |
91 | |
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92 typedef struct ngx_table_elt_s ngx_table_elt_t; |
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93 |
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94 struct ngx_table_elt_s { |
589 | 95 ngx_uint_t hash; |
96 ngx_str_t key; | |
97 ngx_str_t value; | |
649 | 98 u_char *lowcase_key; |
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99 ngx_table_elt_t *next; |
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100 }; |
507 | 101 |
102 | |
589 | 103 void *ngx_hash_find(ngx_hash_t *hash, ngx_uint_t key, u_char *name, size_t len); |
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104 void *ngx_hash_find_wc_head(ngx_hash_wildcard_t *hwc, u_char *name, size_t len); |
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105 void *ngx_hash_find_wc_tail(ngx_hash_wildcard_t *hwc, u_char *name, size_t len); |
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106 void *ngx_hash_find_combined(ngx_hash_combined_t *hash, ngx_uint_t key, |
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107 u_char *name, size_t len); |
589 | 108 |
109 ngx_int_t ngx_hash_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names, | |
110 ngx_uint_t nelts); | |
111 ngx_int_t ngx_hash_wildcard_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names, | |
112 ngx_uint_t nelts); | |
113 | |
649 | 114 #define ngx_hash(key, c) ((ngx_uint_t) key * 31 + c) |
589 | 115 ngx_uint_t ngx_hash_key(u_char *data, size_t len); |
116 ngx_uint_t ngx_hash_key_lc(u_char *data, size_t len); | |
2136 | 117 ngx_uint_t ngx_hash_strlow(u_char *dst, u_char *src, size_t n); |
118 | |
589 | 119 |
593 | 120 ngx_int_t ngx_hash_keys_array_init(ngx_hash_keys_arrays_t *ha, ngx_uint_t type); |
121 ngx_int_t ngx_hash_add_key(ngx_hash_keys_arrays_t *ha, ngx_str_t *key, | |
122 void *value, ngx_uint_t flags); | |
123 | |
589 | 124 |
507 | 125 #endif /* _NGX_HASH_H_INCLUDED_ */ |