nginx/src/http/ngx_http_core_module.h

   1
   2 /*
   3  * Copyright (C) Igor Sysoev
   4  */
   5
   6
   7 #ifndef _NGX_HTTP_CORE_H_INCLUDED_
   8 #define _NGX_HTTP_CORE_H_INCLUDED_
   9
  10
  11 #include <ngx_config.h>
  12 #include <ngx_core.h>
  13 #include <ngx_http.h>
  14
  15
  16 #define NGX_HTTP_GZIP_PROXIED_OFF       0x0002
  17 #define NGX_HTTP_GZIP_PROXIED_EXPIRED   0x0004
  18 #define NGX_HTTP_GZIP_PROXIED_NO_CACHE  0x0008
  19 #define NGX_HTTP_GZIP_PROXIED_NO_STORE  0x0010
  20 #define NGX_HTTP_GZIP_PROXIED_PRIVATE   0x0020
  21 #define NGX_HTTP_GZIP_PROXIED_NO_LM     0x0040
  22 #define NGX_HTTP_GZIP_PROXIED_NO_ETAG   0x0080
  23 #define NGX_HTTP_GZIP_PROXIED_AUTH      0x0100
  24 #define NGX_HTTP_GZIP_PROXIED_ANY       0x0200
  25
  26
  27 #define NGX_HTTP_SATISFY_ALL            0
  28 #define NGX_HTTP_SATISFY_ANY            1
  29
  30
  31 #define NGX_HTTP_IMS_OFF                0
  32 #define NGX_HTTP_IMS_EXACT              1
  33 #define NGX_HTTP_IMS_BEFORE             2
  34
  35
  36 typedef struct ngx_http_location_tree_node_s  ngx_http_location_tree_node_t;
  37 typedef struct ngx_http_core_loc_conf_s  ngx_http_core_loc_conf_t;
  38
  39
  40 typedef struct {
  41     unsigned                   default_server:1;
  42     unsigned                   bind:1;
  43     unsigned                   wildcard:1;
  44 #if (NGX_HTTP_SSL)
  45     unsigned                   ssl:1;
  46 #endif
  47
  48     int                        backlog;
  49     int                        rcvbuf;
  50     int                        sndbuf;
  51
  52 #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
  53     char                      *accept_filter;
  54 #endif
  55 #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
  56     ngx_uint_t                 deferred_accept;
  57 #endif
  58
  59     u_char                     addr[NGX_SOCKADDR_STRLEN + 1];
  60 } ngx_http_listen_conf_t;
  61
  62
  63 typedef struct {
  64     u_char                     sockaddr[NGX_SOCKADDRLEN];
  65     socklen_t                  socklen;
  66
  67     u_char                    *file_name;
  68     ngx_uint_t                 line;
  69
  70     ngx_http_listen_conf_t     conf;
  71 } ngx_http_listen_t;
  72
  73
  74 typedef enum {
  75     NGX_HTTP_POST_READ_PHASE = 0,
  76
  77     NGX_HTTP_SERVER_REWRITE_PHASE,
  78
  79     NGX_HTTP_FIND_CONFIG_PHASE,
  80     NGX_HTTP_REWRITE_PHASE,
  81     NGX_HTTP_POST_REWRITE_PHASE,
  82
  83     NGX_HTTP_PREACCESS_PHASE,
  84
  85     NGX_HTTP_ACCESS_PHASE,
  86     NGX_HTTP_POST_ACCESS_PHASE,
  87
  88     NGX_HTTP_TRY_FILES_PHASE,
  89     NGX_HTTP_CONTENT_PHASE,
  90
  91     NGX_HTTP_LOG_PHASE
  92 } ngx_http_phases;
  93
  94 typedef struct ngx_http_phase_handler_s  ngx_http_phase_handler_t;
  95
  96 typedef ngx_int_t (*ngx_http_phase_handler_pt)(ngx_http_request_t *r,
  97     ngx_http_phase_handler_t *ph);
  98
  99 struct ngx_http_phase_handler_s {
 100     ngx_http_phase_handler_pt  checker;
 101     ngx_http_handler_pt        handler;
 102     ngx_uint_t                 next;
 103 };
 104
 105
 106 typedef struct {
 107     ngx_http_phase_handler_t  *handlers;
 108     ngx_uint_t                 server_rewrite_index;
 109     ngx_uint_t                 location_rewrite_index;
 110 } ngx_http_phase_engine_t;
 111
 112
 113 typedef struct {
 114     ngx_array_t                handlers;
 115 } ngx_http_phase_t;
 116
 117
 118 typedef struct {
 119     ngx_array_t                servers;         /* ngx_http_core_srv_conf_t */
 120
 121     ngx_http_phase_engine_t    phase_engine;
 122
 123     ngx_hash_t                 headers_in_hash;
 124
 125     ngx_hash_t                 variables_hash;
 126
 127     ngx_array_t                variables;       /* ngx_http_variable_t */
 128
 129     ngx_uint_t                 server_names_hash_max_size;
 130     ngx_uint_t                 server_names_hash_bucket_size;
 131
 132     ngx_uint_t                 variables_hash_max_size;
 133     ngx_uint_t                 variables_hash_bucket_size;
 134
 135     ngx_hash_keys_arrays_t    *variables_keys;
 136
 137     ngx_uint_t                 try_files;       /* unsigned  try_files:1 */
 138
 139     ngx_http_phase_t           phases[NGX_HTTP_LOG_PHASE + 1];
 140 } ngx_http_core_main_conf_t;
 141
 142
 143 typedef struct {
 144     /* array of the ngx_http_listen_t, "listen" directive */
 145     ngx_array_t                 listen;
 146
 147     /* array of the ngx_http_server_name_t, "server_name" directive */
 148     ngx_array_t                 server_names;
 149
 150     /* server ctx */
 151     ngx_http_conf_ctx_t        *ctx;
 152
 153     ngx_http_virtual_names_t   *virtual_names;
 154
 155     ngx_str_t                   server_name;
 156
 157     size_t                      connection_pool_size;
 158     size_t                      request_pool_size;
 159     size_t                      client_header_buffer_size;
 160
 161     ngx_bufs_t                  large_client_header_buffers;
 162
 163     ngx_msec_t                  client_header_timeout;
 164
 165     ngx_flag_t                  ignore_invalid_headers;
 166     ngx_flag_t                  merge_slashes;
 167     ngx_flag_t                  underscores_in_headers;
 168
 169     ngx_http_core_loc_conf_t  **named_locations;
 170 } ngx_http_core_srv_conf_t;
 171
 172
 173 /* list of structures to find core_srv_conf quickly at run time */
 174
 175
 176 typedef struct {
 177     /* the default server configuration for this address:port */
 178     ngx_http_core_srv_conf_t  *core_srv_conf;
 179
 180 #if (NGX_HTTP_SSL)
 181     ngx_uint_t                 ssl;   /* unsigned  ssl:1; */
 182 #endif
 183 } ngx_http_addr_conf_t;
 184
 185
 186 typedef struct {
 187     in_addr_t                  addr;
 188     ngx_http_addr_conf_t       conf;
 189 } ngx_http_in_addr_t;
 190
 191
 192 #if (NGX_HAVE_INET6)
 193
 194 typedef struct {
 195     struct in6_addr            addr6;
 196     ngx_http_addr_conf_t       conf;
 197 } ngx_http_in6_addr_t;
 198
 199 #endif
 200
 201
 202 typedef struct {
 203     /* ngx_http_in_addr_t or ngx_http_in6_addr_t */
 204     void                      *addrs;
 205     ngx_uint_t                 naddrs;
 206 } ngx_http_port_t;
 207
 208
 209 typedef struct {
 210     ngx_int_t                  family;
 211     in_port_t                  port;
 212     ngx_array_t                addrs;     /* array of ngx_http_conf_addr_t */
 213 } ngx_http_conf_port_t;
 214
 215
 216 typedef struct {
 217     struct sockaddr           *sockaddr;
 218     socklen_t                  socklen;
 219
 220     ngx_hash_t                 hash;
 221     ngx_hash_wildcard_t       *wc_head;
 222     ngx_hash_wildcard_t       *wc_tail;
 223
 224     ngx_array_t                names;      /* array of ngx_http_server_name_t */
 225
 226 #if (NGX_PCRE)
 227     ngx_uint_t                 nregex;
 228     ngx_http_server_name_t    *regex;
 229 #endif
 230
 231     /* the default server configuration for this address:port */
 232     ngx_http_core_srv_conf_t  *core_srv_conf;
 233
 234     unsigned                   default_server:1;
 235     unsigned                   bind:1;
 236     unsigned                   wildcard:1;
 237 #if (NGX_HTTP_SSL)
 238     unsigned                   ssl:1;
 239 #endif
 240
 241     ngx_http_listen_conf_t    *listen_conf;
 242 } ngx_http_conf_addr_t;
 243
 244
 245 struct ngx_http_server_name_s {
 246 #if (NGX_PCRE)
 247     ngx_regex_t               *regex;
 248     ngx_uint_t                 captures;      /* unsigned  captures:1; */
 249 #endif
 250     ngx_http_core_srv_conf_t  *core_srv_conf; /* virtual name server conf */
 251     ngx_str_t                  name;
 252 };
 253
 254
 255 typedef struct {
 256     ngx_int_t                  status;
 257     ngx_int_t                  overwrite;
 258     ngx_str_t                  uri;
 259     ngx_str_t                  args;
 260     ngx_array_t               *uri_lengths;
 261     ngx_array_t               *uri_values;
 262 } ngx_http_err_page_t;
 263
 264
 265 typedef struct {
 266     ngx_array_t               *lengths;
 267     ngx_array_t               *values;
 268     ngx_str_t                  name;
 269     ngx_uint_t                 test_dir;   /* unsigned  test_dir:1; */
 270 } ngx_http_try_file_t;
 271
 272
 273 struct ngx_http_core_loc_conf_s {
 274     ngx_str_t     name;          /* location name */
 275
 276 #if (NGX_PCRE)
 277     ngx_regex_t  *regex;
 278
 279     unsigned      captures:1;
 280 #endif
 281
 282     unsigned      noname:1;   /* "if () {}" block or limit_except */
 283     unsigned      named:1;
 284
 285     unsigned      exact_match:1;
 286     unsigned      noregex:1;
 287
 288     unsigned      auto_redirect:1;
 289     unsigned      alias:1;
 290 #if (NGX_HTTP_GZIP)
 291     unsigned      gzip_disable_msie6:2;
 292 #endif
 293
 294     ngx_http_location_tree_node_t   *static_locations;
 295 #if (NGX_PCRE)
 296     ngx_http_core_loc_conf_t       **regex_locations;
 297 #endif
 298
 299     /* pointer to the modules' loc_conf */
 300     void        **loc_conf;
 301
 302     uint32_t      limit_except;
 303     void        **limit_except_loc_conf;
 304
 305     ngx_http_handler_pt  handler;
 306
 307     ngx_str_t     root;                    /* root, alias */
 308     ngx_str_t     post_action;
 309
 310     ngx_array_t  *root_lengths;
 311     ngx_array_t  *root_values;
 312
 313     ngx_array_t  *types;
 314     ngx_hash_t    types_hash;
 315     ngx_str_t     default_type;
 316
 317     off_t         client_max_body_size;    /* client_max_body_size */
 318     off_t         directio;                /* directio */
 319
 320     size_t        client_body_buffer_size; /* client_body_buffer_size */
 321     size_t        send_lowat;              /* send_lowat */
 322     size_t        postpone_output;         /* postpone_output */
 323     size_t        limit_rate;              /* limit_rate */
 324     size_t        sendfile_max_chunk;      /* sendfile_max_chunk */
 325
 326     ngx_msec_t    client_body_timeout;     /* client_body_timeout */
 327     ngx_msec_t    send_timeout;            /* send_timeout */
 328     ngx_msec_t    keepalive_timeout;       /* keepalive_timeout */
 329     ngx_msec_t    lingering_time;          /* lingering_time */
 330     ngx_msec_t    lingering_timeout;       /* lingering_timeout */
 331     ngx_msec_t    resolver_timeout;        /* resolver_timeout */
 332
 333     ngx_resolver_t  *resolver;             /* resolver */
 334
 335     time_t        keepalive_header;        /* keepalive_timeout */
 336
 337     ngx_uint_t    satisfy;                 /* satisfy */
 338     ngx_uint_t    if_modified_since;       /* if_modified_since */
 339
 340     ngx_flag_t    internal;                /* internal */
 341     ngx_flag_t    client_body_in_file_only; /* client_body_in_file_only */
 342     ngx_flag_t    sendfile;                /* sendfile */
 343     ngx_flag_t    tcp_nopush;              /* tcp_nopush */
 344     ngx_flag_t    tcp_nodelay;             /* tcp_nodelay */
 345     ngx_flag_t    reset_timedout_connection; /* reset_timedout_connection */
 346     ngx_flag_t    server_name_in_redirect; /* server_name_in_redirect */
 347     ngx_flag_t    port_in_redirect;        /* port_in_redirect */
 348     ngx_flag_t    msie_padding;            /* msie_padding */
 349     ngx_flag_t    msie_refresh;            /* msie_refresh */
 350     ngx_flag_t    log_not_found;           /* log_not_found */
 351     ngx_flag_t    log_subrequest;          /* log_subrequest */
 352     ngx_flag_t    recursive_error_pages;   /* recursive_error_pages */
 353     ngx_flag_t    server_tokens;           /* server_tokens */
 354
 355 #if (NGX_HTTP_GZIP)
 356     ngx_flag_t    gzip_vary;               /* gzip_vary */
 357
 358     ngx_uint_t    gzip_http_version;       /* gzip_http_version */
 359     ngx_uint_t    gzip_proxied;            /* gzip_proxied */
 360
 361 #if (NGX_PCRE)
 362     ngx_array_t  *gzip_disable;            /* gzip_disable */
 363 #endif
 364 #endif
 365
 366     ngx_array_t  *error_pages;             /* error_page */
 367     ngx_http_try_file_t    *try_files;     /* try_files */
 368
 369     ngx_path_t   *client_body_temp_path;   /* client_body_temp_path */
 370
 371     ngx_open_file_cache_t  *open_file_cache;
 372     time_t        open_file_cache_valid;
 373     ngx_uint_t    open_file_cache_min_uses;
 374     ngx_flag_t    open_file_cache_errors;
 375     ngx_flag_t    open_file_cache_events;
 376
 377     ngx_log_t    *err_log;
 378
 379     ngx_uint_t    types_hash_max_size;
 380     ngx_uint_t    types_hash_bucket_size;
 381
 382     ngx_queue_t  *locations;
 383
 384 #if 0
 385     ngx_http_core_loc_conf_t  *prev_location;
 386 #endif
 387 };
 388
 389
 390 typedef struct {
 391     ngx_queue_t                      queue;
 392     ngx_http_core_loc_conf_t        *exact;
 393     ngx_http_core_loc_conf_t        *inclusive;
 394     ngx_str_t                       *name;
 395     u_char                          *file_name;
 396     ngx_uint_t                       line;
 397     ngx_queue_t                      list;
 398 } ngx_http_location_queue_t;
 399
 400
 401 struct ngx_http_location_tree_node_s {
 402     ngx_http_location_tree_node_t   *left;
 403     ngx_http_location_tree_node_t   *right;
 404     ngx_http_location_tree_node_t   *tree;
 405
 406     ngx_http_core_loc_conf_t        *exact;
 407     ngx_http_core_loc_conf_t        *inclusive;
 408
 409     u_char                           auto_redirect;
 410     u_char                           len;
 411     u_char                           name[1];
 412 };
 413
 414
 415 void ngx_http_core_run_phases(ngx_http_request_t *r);
 416 ngx_int_t ngx_http_core_generic_phase(ngx_http_request_t *r,
 417     ngx_http_phase_handler_t *ph);
 418 ngx_int_t ngx_http_core_find_config_phase(ngx_http_request_t *r,
 419     ngx_http_phase_handler_t *ph);
 420 ngx_int_t ngx_http_core_post_rewrite_phase(ngx_http_request_t *r,
 421     ngx_http_phase_handler_t *ph);
 422 ngx_int_t ngx_http_core_access_phase(ngx_http_request_t *r,
 423     ngx_http_phase_handler_t *ph);
 424 ngx_int_t ngx_http_core_post_access_phase(ngx_http_request_t *r,
 425     ngx_http_phase_handler_t *ph);
 426 ngx_int_t ngx_http_core_try_files_phase(ngx_http_request_t *r,
 427     ngx_http_phase_handler_t *ph);
 428 ngx_int_t ngx_http_core_content_phase(ngx_http_request_t *r,
 429     ngx_http_phase_handler_t *ph);
 430
 431
 432 void *ngx_http_test_content_type(ngx_http_request_t *r, ngx_hash_t *types_hash);
 433 ngx_int_t ngx_http_set_content_type(ngx_http_request_t *r);
 434 ngx_int_t ngx_http_set_exten(ngx_http_request_t *r);
 435 u_char *ngx_http_map_uri_to_path(ngx_http_request_t *r, ngx_str_t *name,
 436     size_t *root_length, size_t reserved);
 437 ngx_int_t ngx_http_auth_basic_user(ngx_http_request_t *r);
 438 ngx_int_t ngx_http_server_addr(ngx_http_request_t *r, ngx_str_t *s);
 439 #if (NGX_HTTP_GZIP)
 440 ngx_int_t ngx_http_gzip_ok(ngx_http_request_t *r);
 441 #endif
 442
 443
 444 ngx_int_t ngx_http_subrequest(ngx_http_request_t *r,
 445     ngx_str_t *uri, ngx_str_t *args, ngx_http_request_t **sr,
 446     ngx_http_post_subrequest_t *psr, ngx_uint_t flags);
 447 ngx_int_t ngx_http_internal_redirect(ngx_http_request_t *r,
 448     ngx_str_t *uri, ngx_str_t *args);
 449 ngx_int_t ngx_http_named_location(ngx_http_request_t *r, ngx_str_t *name);
 450
 451
 452 ngx_http_cleanup_t *ngx_http_cleanup_add(ngx_http_request_t *r, size_t size);
 453
 454
 455 typedef ngx_int_t (*ngx_http_output_header_filter_pt)(ngx_http_request_t *r);
 456 typedef ngx_int_t (*ngx_http_output_body_filter_pt)
 457     (ngx_http_request_t *r, ngx_chain_t *chain);
 458
 459
 460 ngx_int_t ngx_http_output_filter(ngx_http_request_t *r, ngx_chain_t *chain);
 461 ngx_int_t ngx_http_write_filter(ngx_http_request_t *r, ngx_chain_t *chain);
 462
 463
 464 extern ngx_module_t  ngx_http_core_module;
 465
 466 extern ngx_uint_t ngx_http_max_module;
 467
 468
 469 #define ngx_http_clear_content_length(r)                                      \
 470                                                                               \
 471     r->headers_out.content_length_n = -1;                                     \
 472     if (r->headers_out.content_length) {                                      \
 473         r->headers_out.content_length->hash = 0;                              \
 474         r->headers_out.content_length = NULL;                                 \
 475     }
 476                                                                               \
 477 #define ngx_http_clear_accept_ranges(r)                                       \
 478                                                                               \
 479     r->allow_ranges = 0;                                                      \
 480     if (r->headers_out.accept_ranges) {                                       \
 481         r->headers_out.accept_ranges->hash = 0;                               \
 482         r->headers_out.accept_ranges = NULL;                                  \
 483     }
 484
 485 #define ngx_http_clear_last_modified(r)                                       \
 486                                                                               \
 487     r->headers_out.last_modified_time = -1;                                   \
 488     if (r->headers_out.last_modified) {                                       \
 489         r->headers_out.last_modified->hash = 0;                               \
 490         r->headers_out.last_modified = NULL;                                  \
 491     }
 492
 493
 494 #endif /* _NGX_HTTP_CORE_H_INCLUDED_ */