1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #ifndef _NGX_HTTP_VARIABLES_H_INCLUDED_
8 #define _NGX_HTTP_VARIABLES_H_INCLUDED_
9
10
11 #include <ngx_config.h>
12 #include <ngx_core.h>
13 #include <ngx_http.h>
14
15
16 typedef ngx_variable_value_t ngx_http_variable_value_t;
17
18 #define ngx_http_variable(v) { sizeof(v) - 1, 1, 0, 0, 0, (u_char *) v }
19
20 typedef struct ngx_http_variable_s ngx_http_variable_t;
21
22 typedef void (*ngx_http_set_variable_pt) (ngx_http_request_t *r,
23 ngx_http_variable_value_t *v, uintptr_t data);
24 typedef ngx_int_t (*ngx_http_get_variable_pt) (ngx_http_request_t *r,
25 ngx_http_variable_value_t *v, uintptr_t data);
26
27
28 #define NGX_HTTP_VAR_CHANGEABLE 1
29 #define NGX_HTTP_VAR_NOCACHEABLE 2
30 #define NGX_HTTP_VAR_INDEXED 4
31 #define NGX_HTTP_VAR_NOHASH 8
32
33
34 struct ngx_http_variable_s {
35 ngx_str_t name; /* must be first to build the hash */
36 ngx_http_set_variable_pt set_handler;
37 ngx_http_get_variable_pt get_handler;
38 uintptr_t data;
39 ngx_uint_t flags;
40 ngx_uint_t index;
41 };
42
43
44 ngx_http_variable_t *ngx_http_add_variable(ngx_conf_t *cf, ngx_str_t *name,
45 ngx_uint_t flags);
46 ngx_int_t ngx_http_get_variable_index(ngx_conf_t *cf, ngx_str_t *name);
47 ngx_http_variable_value_t *ngx_http_get_indexed_variable(ngx_http_request_t *r,
48 ngx_uint_t index);
49 ngx_http_variable_value_t *ngx_http_get_flushed_variable(ngx_http_request_t *r,
50 ngx_uint_t index);
51
52 ngx_http_variable_value_t *ngx_http_get_variable(ngx_http_request_t *r,
53 ngx_str_t *name, ngx_uint_t key, ngx_uint_t nowarn);
54
55 ngx_int_t ngx_http_variable_unknown_header(ngx_http_variable_value_t *v,
56 ngx_str_t *var, ngx_list_part_t *part, size_t prefix);
57
58
59 #define ngx_http_clear_variable(r, index) r->variables0[index].text.data = NULL;
60
61
62 ngx_int_t ngx_http_variables_add_core_vars(ngx_conf_t *cf);
63 ngx_int_t ngx_http_variables_init_vars(ngx_conf_t *cf);
64
65
66 typedef struct {
67 ngx_rbtree_node_t node;
68 size_t len;
69 ngx_http_variable_value_t *value;
70 } ngx_http_variable_value_node_t;
71
72
73 void ngx_http_variable_value_rbtree_insert(ngx_rbtree_node_t *temp,
74 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
75 ngx_http_variable_value_t *ngx_http_variable_value_lookup(ngx_rbtree_t *rbtree,
76 ngx_str_t *name, uint32_t hash);
77
78
79 extern ngx_http_variable_value_t ngx_http_variable_null_value;
80 extern ngx_http_variable_value_t ngx_http_variable_true_value;
81
82
83 #endif /* _NGX_HTTP_VARIABLES_H_INCLUDED_ */
84
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