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ngx_http_script.h
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1 
2 /*
3  * Copyright (C) Igor Sysoev
4  * Copyright (C) Nginx, Inc.
5  */
6 
7 
8 #ifndef _NGX_HTTP_SCRIPT_H_INCLUDED_
9 #define _NGX_HTTP_SCRIPT_H_INCLUDED_
10 
11 
12 #include <ngx_config.h>
13 #include <ngx_core.h>
14 #include <ngx_http.h>
15 
16 
17 typedef struct {
18  u_char *ip;
19  u_char *pos;
20  ngx_http_variable_value_t *sp;
21 
22  ngx_str_t buf;
23  ngx_str_t line;
24 
25  /* the start of the rewritten arguments */
26  u_char *args;
27 
28  unsigned flushed:1;
29  unsigned skip:1;
30  unsigned quote:1;
31  unsigned is_args:1;
32  unsigned log:1;
33 
34  ngx_int_t status;
35  ngx_http_request_t *request;
36 } ngx_http_script_engine_t;
37 
38 
39 typedef struct {
40  ngx_conf_t *cf;
41  ngx_str_t *source;
42 
43  ngx_array_t **flushes;
44  ngx_array_t **lengths;
45  ngx_array_t **values;
46 
47  ngx_uint_t variables;
48  ngx_uint_t ncaptures;
49  ngx_uint_t captures_mask;
50  ngx_uint_t size;
51 
52  void *main;
53 
54  unsigned compile_args:1;
55  unsigned complete_lengths:1;
56  unsigned complete_values:1;
57  unsigned zero:1;
58  unsigned conf_prefix:1;
59  unsigned root_prefix:1;
60 
61  unsigned dup_capture:1;
62  unsigned args:1;
63 } ngx_http_script_compile_t;
64 
65 
66 typedef struct {
67  ngx_str_t value;
68  ngx_uint_t *flushes;
69  void *lengths;
70  void *values;
71 } ngx_http_complex_value_t;
72 
73 
74 typedef struct {
75  ngx_conf_t *cf;
76  ngx_str_t *value;
77  ngx_http_complex_value_t *complex_value;
78 
79  unsigned zero:1;
80  unsigned conf_prefix:1;
81  unsigned root_prefix:1;
82 } ngx_http_compile_complex_value_t;
83 
84 
85 typedef void (*ngx_http_script_code_pt) (ngx_http_script_engine_t *e);
86 typedef size_t (*ngx_http_script_len_code_pt) (ngx_http_script_engine_t *e);
87 
88 
89 typedef struct {
90  ngx_http_script_code_pt code;
91  uintptr_t len;
92 } ngx_http_script_copy_code_t;
93 
94 
95 typedef struct {
96  ngx_http_script_code_pt code;
97  uintptr_t index;
98 } ngx_http_script_var_code_t;
99 
100 
101 typedef struct {
102  ngx_http_script_code_pt code;
103  ngx_http_set_variable_pt handler;
104  uintptr_t data;
105 } ngx_http_script_var_handler_code_t;
106 
107 
108 typedef struct {
109  ngx_http_script_code_pt code;
110  uintptr_t n;
111 } ngx_http_script_copy_capture_code_t;
112 
113 
114 #if (NGX_PCRE)
115 
116 typedef struct {
117  ngx_http_script_code_pt code;
118  ngx_http_regex_t *regex;
119  ngx_array_t *lengths;
120  uintptr_t size;
121  uintptr_t status;
122  uintptr_t next;
123 
124  uintptr_t test:1;
125  uintptr_t negative_test:1;
126  uintptr_t uri:1;
127  uintptr_t args:1;
128 
129  /* add the r->args to the new arguments */
130  uintptr_t add_args:1;
131 
132  uintptr_t redirect:1;
133  uintptr_t break_cycle:1;
134 
135  ngx_str_t name;
136 } ngx_http_script_regex_code_t;
137 
138 
139 typedef struct {
140  ngx_http_script_code_pt code;
141 
142  uintptr_t uri:1;
143  uintptr_t args:1;
144 
145  /* add the r->args to the new arguments */
146  uintptr_t add_args:1;
147 
148  uintptr_t redirect:1;
149 } ngx_http_script_regex_end_code_t;
150 
151 #endif
152 
153 
154 typedef struct {
155  ngx_http_script_code_pt code;
156  uintptr_t conf_prefix;
157 } ngx_http_script_full_name_code_t;
158 
159 
160 typedef struct {
161  ngx_http_script_code_pt code;
162  uintptr_t status;
163  ngx_http_complex_value_t text;
164 } ngx_http_script_return_code_t;
165 
166 
167 typedef enum {
168  ngx_http_script_file_plain = 0,
169  ngx_http_script_file_not_plain,
170  ngx_http_script_file_dir,
171  ngx_http_script_file_not_dir,
172  ngx_http_script_file_exists,
173  ngx_http_script_file_not_exists,
174  ngx_http_script_file_exec,
175  ngx_http_script_file_not_exec
176 } ngx_http_script_file_op_e;
177 
178 
179 typedef struct {
180  ngx_http_script_code_pt code;
181  uintptr_t op;
182 } ngx_http_script_file_code_t;
183 
184 
185 typedef struct {
186  ngx_http_script_code_pt code;
187  uintptr_t next;
188  void **loc_conf;
189 } ngx_http_script_if_code_t;
190 
191 
192 typedef struct {
193  ngx_http_script_code_pt code;
194  ngx_array_t *lengths;
195 } ngx_http_script_complex_value_code_t;
196 
197 
198 typedef struct {
199  ngx_http_script_code_pt code;
200  uintptr_t value;
201  uintptr_t text_len;
202  uintptr_t text_data;
203 } ngx_http_script_value_code_t;
204 
205 
206 void ngx_http_script_flush_complex_value(ngx_http_request_t *r,
207  ngx_http_complex_value_t *val);
208 ngx_int_t ngx_http_complex_value(ngx_http_request_t *r,
209  ngx_http_complex_value_t *val, ngx_str_t *value);
210 ngx_int_t ngx_http_compile_complex_value(ngx_http_compile_complex_value_t *ccv);
211 char *ngx_http_set_complex_value_slot(ngx_conf_t *cf, ngx_command_t *cmd,
212  void *conf);
213 
214 
215 ngx_int_t ngx_http_test_predicates(ngx_http_request_t *r,
216  ngx_array_t *predicates);
217 char *ngx_http_set_predicate_slot(ngx_conf_t *cf, ngx_command_t *cmd,
218  void *conf);
219 
220 ngx_uint_t ngx_http_script_variables_count(ngx_str_t *value);
221 ngx_int_t ngx_http_script_compile(ngx_http_script_compile_t *sc);
222 u_char *ngx_http_script_run(ngx_http_request_t *r, ngx_str_t *value,
223  void *code_lengths, size_t reserved, void *code_values);
224 void ngx_http_script_flush_no_cacheable_variables(ngx_http_request_t *r,
225  ngx_array_t *indices);
226 
227 void *ngx_http_script_start_code(ngx_pool_t *pool, ngx_array_t **codes,
228  size_t size);
229 void *ngx_http_script_add_code(ngx_array_t *codes, size_t size, void *code);
230 
231 size_t ngx_http_script_copy_len_code(ngx_http_script_engine_t *e);
232 void ngx_http_script_copy_code(ngx_http_script_engine_t *e);
233 size_t ngx_http_script_copy_var_len_code(ngx_http_script_engine_t *e);
234 void ngx_http_script_copy_var_code(ngx_http_script_engine_t *e);
235 size_t ngx_http_script_copy_capture_len_code(ngx_http_script_engine_t *e);
236 void ngx_http_script_copy_capture_code(ngx_http_script_engine_t *e);
237 size_t ngx_http_script_mark_args_code(ngx_http_script_engine_t *e);
238 void ngx_http_script_start_args_code(ngx_http_script_engine_t *e);
239 #if (NGX_PCRE)
240 void ngx_http_script_regex_start_code(ngx_http_script_engine_t *e);
241 void ngx_http_script_regex_end_code(ngx_http_script_engine_t *e);
242 #endif
243 void ngx_http_script_return_code(ngx_http_script_engine_t *e);
244 void ngx_http_script_break_code(ngx_http_script_engine_t *e);
245 void ngx_http_script_if_code(ngx_http_script_engine_t *e);
246 void ngx_http_script_equal_code(ngx_http_script_engine_t *e);
247 void ngx_http_script_not_equal_code(ngx_http_script_engine_t *e);
248 void ngx_http_script_file_code(ngx_http_script_engine_t *e);
249 void ngx_http_script_complex_value_code(ngx_http_script_engine_t *e);
250 void ngx_http_script_value_code(ngx_http_script_engine_t *e);
251 void ngx_http_script_set_var_code(ngx_http_script_engine_t *e);
252 void ngx_http_script_var_set_handler_code(ngx_http_script_engine_t *e);
253 void ngx_http_script_var_code(ngx_http_script_engine_t *e);
254 void ngx_http_script_nop_code(ngx_http_script_engine_t *e);
255 
256 
257 #endif /* _NGX_HTTP_SCRIPT_H_INCLUDED_ */
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