ngx_http_core_module.c

Nginx是一个高性能的HTTP和反向代理服务器

/*
 * Copyright (C) Igor Sysoev
 */


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#include <ngx_http.h>
#include <nginx.h>


typedef struct {
    u_char    *name;
    uint32_t   method;
} ngx_http_method_name_t;


#define NGX_HTTP_LOCATION_EXACT           1
#define NGX_HTTP_LOCATION_AUTO_REDIRECT   2
#define NGX_HTTP_LOCATION_NOREGEX         3
#define NGX_HTTP_LOCATION_REGEX           4


#define NGX_HTTP_REQUEST_BODY_FILE_OFF    0
#define NGX_HTTP_REQUEST_BODY_FILE_ON     1
#define NGX_HTTP_REQUEST_BODY_FILE_CLEAN  2


static ngx_int_t ngx_http_core_find_location(ngx_http_request_t *r,
    ngx_array_t *locations, ngx_uint_t regex_start, size_t len);

static ngx_int_t ngx_http_core_preconfiguration(ngx_conf_t *cf);
static void *ngx_http_core_create_main_conf(ngx_conf_t *cf);
static char *ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf);
static void *ngx_http_core_create_srv_conf(ngx_conf_t *cf);
static char *ngx_http_core_merge_srv_conf(ngx_conf_t *cf,
    void *parent, void *child);
static void *ngx_http_core_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_core_merge_loc_conf(ngx_conf_t *cf,
    void *parent, void *child);

static char *ngx_http_core_server(ngx_conf_t *cf, ngx_command_t *cmd,
    void *dummy);
static char *ngx_http_core_location(ngx_conf_t *cf, ngx_command_t *cmd,
    void *dummy);
static ngx_int_t ngx_http_core_cmp_locations(const void *first,
    const void *second);

static char *ngx_http_core_types(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_core_type(ngx_conf_t *cf, ngx_command_t *dummy,
    void *conf);

static char *ngx_http_core_listen(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_core_server_name(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_core_root(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static char *ngx_http_core_limit_except(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_core_error_page(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_core_open_file_cache(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_core_error_log(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_core_keepalive(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_core_internal(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
static char *ngx_http_core_resolver(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
#if (NGX_HTTP_GZIP)
static char *ngx_http_gzip_disable(ngx_conf_t *cf, ngx_command_t *cmd,
    void *conf);
#endif

static char *ngx_http_core_lowat_check(ngx_conf_t *cf, void *post, void *data);
static char *ngx_http_core_pool_size(ngx_conf_t *cf, void *post, void *data);

static ngx_conf_post_t  ngx_http_core_lowat_post =
    { ngx_http_core_lowat_check };

static ngx_conf_post_handler_pt  ngx_http_core_pool_size_p =
    ngx_http_core_pool_size;

static ngx_conf_deprecated_t  ngx_conf_deprecated_optimize_host_names = {
    ngx_conf_deprecated, "optimize_host_names", "optimize_server_names"
};

static ngx_conf_deprecated_t  ngx_conf_deprecated_open_file_cache_retest = {
    ngx_conf_deprecated, "open_file_cache_retest", "open_file_cache_valid"
};

static ngx_conf_deprecated_t  ngx_conf_deprecated_satisfy_any = {
    ngx_conf_deprecated, "satisfy_any", "satisfy"
};


static ngx_conf_enum_t  ngx_http_core_request_body_in_file[] = {
    { ngx_string("off"), NGX_HTTP_REQUEST_BODY_FILE_OFF },
    { ngx_string("on"), NGX_HTTP_REQUEST_BODY_FILE_ON },
    { ngx_string("clean"), NGX_HTTP_REQUEST_BODY_FILE_CLEAN },
    { ngx_null_string, 0 }
};


static ngx_conf_enum_t  ngx_http_core_satisfy[] = {
    { ngx_string("all"), NGX_HTTP_SATISFY_ALL },
    { ngx_string("any"), NGX_HTTP_SATISFY_ANY },
    { ngx_null_string, 0 }
};


#if (NGX_HTTP_GZIP)

static ngx_conf_enum_t  ngx_http_gzip_http_version[] = {
    { ngx_string("1.0"), NGX_HTTP_VERSION_10 },
    { ngx_string("1.1"), NGX_HTTP_VERSION_11 },
    { ngx_null_string, 0 }
};


static ngx_conf_bitmask_t  ngx_http_gzip_proxied_mask[] = {
    { ngx_string("off"), NGX_HTTP_GZIP_PROXIED_OFF },
    { ngx_string("expired"), NGX_HTTP_GZIP_PROXIED_EXPIRED },
    { ngx_string("no-cache"), NGX_HTTP_GZIP_PROXIED_NO_CACHE },
    { ngx_string("no-store"), NGX_HTTP_GZIP_PROXIED_NO_STORE },
    { ngx_string("private"), NGX_HTTP_GZIP_PROXIED_PRIVATE },
    { ngx_string("no_last_modified"), NGX_HTTP_GZIP_PROXIED_NO_LM },
    { ngx_string("no_etag"), NGX_HTTP_GZIP_PROXIED_NO_ETAG },
    { ngx_string("auth"), NGX_HTTP_GZIP_PROXIED_AUTH },
    { ngx_string("any"), NGX_HTTP_GZIP_PROXIED_ANY },
    { ngx_null_string, 0 }
};


static ngx_str_t  ngx_http_gzip_no_cache = ngx_string("no-cache");
static ngx_str_t  ngx_http_gzip_no_store = ngx_string("no-store");
static ngx_str_t  ngx_http_gzip_private = ngx_string("private");

#endif


static ngx_command_t  ngx_http_core_commands[] = {

    { ngx_string("variables_hash_max_size"),
      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_num_slot,
      NGX_HTTP_MAIN_CONF_OFFSET,
      offsetof(ngx_http_core_main_conf_t, variables_hash_max_size),
      NULL },

    { ngx_string("variables_hash_bucket_size"),
      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_num_slot,
      NGX_HTTP_MAIN_CONF_OFFSET,
      offsetof(ngx_http_core_main_conf_t, variables_hash_bucket_size),
      NULL },

    { ngx_string("server_names_hash_max_size"),
      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_num_slot,
      NGX_HTTP_MAIN_CONF_OFFSET,
      offsetof(ngx_http_core_main_conf_t, server_names_hash_max_size),
      NULL },

    { ngx_string("server_names_hash_bucket_size"),
      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_num_slot,
      NGX_HTTP_MAIN_CONF_OFFSET,
      offsetof(ngx_http_core_main_conf_t, server_names_hash_bucket_size),
      NULL },

    { ngx_string("server"),
      NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_MULTI|NGX_CONF_NOARGS,
      ngx_http_core_server,
      0,
      0,
      NULL },

    { ngx_string("connection_pool_size"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_size_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_core_srv_conf_t, connection_pool_size),
      &ngx_http_core_pool_size_p },

    { ngx_string("request_pool_size"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_size_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_core_srv_conf_t, request_pool_size),
      &ngx_http_core_pool_size_p },

    { ngx_string("client_header_timeout"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_msec_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_core_srv_conf_t, client_header_timeout),
      NULL },

    { ngx_string("client_header_buffer_size"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_size_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_core_srv_conf_t, client_header_buffer_size),
      NULL },

    { ngx_string("large_client_header_buffers"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE2,
      ngx_conf_set_bufs_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_core_srv_conf_t, large_client_header_buffers),
      NULL },

    { ngx_string("optimize_server_names"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_core_srv_conf_t, optimize_server_names),
      NULL },

    { ngx_string("optimize_host_names"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_core_srv_conf_t, optimize_server_names),
      &ngx_conf_deprecated_optimize_host_names },

    { ngx_string("ignore_invalid_headers"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_core_srv_conf_t, ignore_invalid_headers),
      NULL },

    { ngx_string("merge_slashes"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_SRV_CONF_OFFSET,
      offsetof(ngx_http_core_srv_conf_t, merge_slashes),
      NULL },

    { ngx_string("location"),
      NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE12,
      ngx_http_core_location,
      NGX_HTTP_SRV_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("listen"),
      NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
      ngx_http_core_listen,
      NGX_HTTP_SRV_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("server_name"),
      NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
      ngx_http_core_server_name,
      NGX_HTTP_SRV_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("types_hash_max_size"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_num_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, types_hash_max_size),
      NULL },

    { ngx_string("types_hash_bucket_size"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_num_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, types_hash_bucket_size),
      NULL },

    { ngx_string("types"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF
                                          |NGX_CONF_BLOCK|NGX_CONF_NOARGS,
      ngx_http_core_types,
      NGX_HTTP_LOC_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("default_type"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_str_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, default_type),
      NULL },

    { ngx_string("root"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
                        |NGX_CONF_TAKE1,
      ngx_http_core_root,
      NGX_HTTP_LOC_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("alias"),
      NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_http_core_root,
      NGX_HTTP_LOC_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("limit_except"),
      NGX_HTTP_LOC_CONF|NGX_CONF_BLOCK|NGX_CONF_1MORE,
      ngx_http_core_limit_except,
      NGX_HTTP_LOC_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("client_max_body_size"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_off_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, client_max_body_size),
      NULL },

    { ngx_string("client_body_buffer_size"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_size_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, client_body_buffer_size),
      NULL },

    { ngx_string("client_body_timeout"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_msec_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, client_body_timeout),
      NULL },

    { ngx_string("client_body_temp_path"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
      ngx_conf_set_path_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, client_body_temp_path),
      (void *) ngx_garbage_collector_temp_handler },

    { ngx_string("client_body_in_file_only"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
      ngx_conf_set_enum_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, client_body_in_file_only),
      &ngx_http_core_request_body_in_file },

    { ngx_string("sendfile"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
                        |NGX_CONF_TAKE1,
      ngx_conf_set_flag_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, sendfile),
      NULL },

    { ngx_string("sendfile_max_chunk"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_size_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, sendfile_max_chunk),
      NULL },

    { ngx_string("tcp_nopush"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, tcp_nopush),
      NULL },

    { ngx_string("tcp_nodelay"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, tcp_nodelay),
      NULL },

    { ngx_string("send_timeout"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_msec_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, send_timeout),
      NULL },

    { ngx_string("send_lowat"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_size_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, send_lowat),
      &ngx_http_core_lowat_post },

    { ngx_string("postpone_output"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_size_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, postpone_output),
      NULL },

    { ngx_string("limit_rate"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
                        |NGX_CONF_TAKE1,
      ngx_conf_set_size_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, limit_rate),
      NULL },

    { ngx_string("keepalive_timeout"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
      ngx_http_core_keepalive,
      NGX_HTTP_LOC_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("satisfy"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_enum_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, satisfy),
      &ngx_http_core_satisfy },

    { ngx_string("satisfy_any"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, satisfy),
      &ngx_conf_deprecated_satisfy_any },

    { ngx_string("internal"),
      NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
      ngx_http_core_internal,
      NGX_HTTP_LOC_CONF_OFFSET,
      0,
      NULL },

    { ngx_string("lingering_time"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_msec_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, lingering_time),
      NULL },

    { ngx_string("lingering_timeout"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
      ngx_conf_set_msec_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, lingering_timeout),
      NULL },

    { ngx_string("reset_timedout_connection"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, reset_timedout_connection),
      NULL },

    { ngx_string("server_name_in_redirect"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, server_name_in_redirect),
      NULL },

    { ngx_string("port_in_redirect"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, port_in_redirect),
      NULL },

    { ngx_string("msie_padding"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_LOC_CONF_OFFSET,
      offsetof(ngx_http_core_loc_conf_t, msie_padding),
      NULL },

    { ngx_string("msie_refresh"),
      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
      ngx_conf_set_flag_slot,
      NGX_HTTP_LOC_CONF_OFFSET,