ngx_http_request.h

Nginx是一个高性能的HTTP和反向代理服务器

    ngx_chain_t                      *to_write;
    ngx_http_client_body_handler_pt   post_handler;
} ngx_http_request_body_t;


typedef struct {
    ngx_http_request_t               *request;

    ngx_buf_t                       **busy;
    ngx_int_t                         nbusy;

    ngx_buf_t                       **free;
    ngx_int_t                         nfree;

    ngx_uint_t                        pipeline;    /* unsigned  pipeline:1; */
} ngx_http_connection_t;


typedef struct ngx_http_server_name_s  ngx_http_server_name_t;


typedef struct {
     ngx_hash_combined_t              names;

     ngx_uint_t                       nregex;
     ngx_http_server_name_t          *regex;
} ngx_http_virtual_names_t;


typedef void (*ngx_http_cleanup_pt)(void *data);

typedef struct ngx_http_cleanup_s  ngx_http_cleanup_t;

struct ngx_http_cleanup_s {
    ngx_http_cleanup_pt               handler;
    void                             *data;
    ngx_http_cleanup_t               *next;
};


typedef ngx_int_t (*ngx_http_post_subrequest_pt)(ngx_http_request_t *r,
    void *data, ngx_int_t rc);

typedef struct {
    ngx_http_post_subrequest_pt       handler;
    void                             *data;
} ngx_http_post_subrequest_t;


typedef struct ngx_http_postponed_request_s  ngx_http_postponed_request_t;

struct ngx_http_postponed_request_s {
    ngx_http_request_t               *request;
    ngx_chain_t                      *out;
    ngx_http_postponed_request_t     *next;
};


typedef ngx_int_t (*ngx_http_handler_pt)(ngx_http_request_t *r);
typedef void (*ngx_http_event_handler_pt)(ngx_http_request_t *r);


struct ngx_http_request_s {
    uint32_t                          signature;         /* "HTTP" */

    ngx_connection_t                 *connection;

    void                            **ctx;
    void                            **main_conf;
    void                            **srv_conf;
    void                            **loc_conf;

    ngx_http_event_handler_pt         read_event_handler;
    ngx_http_event_handler_pt         write_event_handler;

    ngx_http_cache_t                 *cache;

    ngx_http_upstream_t              *upstream;
    ngx_array_t                      *upstream_states;
                                         /* of ngx_http_upstream_state_t */

    ngx_pool_t                       *pool;
    ngx_buf_t                        *header_in;

    ngx_http_headers_in_t             headers_in;
    ngx_http_headers_out_t            headers_out;

    ngx_http_request_body_t          *request_body;

    time_t                            lingering_time;
    time_t                            start_sec;
    ngx_msec_t                        start_msec;

    ngx_uint_t                        method;
    ngx_uint_t                        http_version;

    ngx_str_t                         request_line;
    ngx_str_t                         uri;
    ngx_str_t                         args;
    ngx_str_t                         exten;
    ngx_str_t                         unparsed_uri;

    ngx_str_t                         method_name;
    ngx_str_t                         http_protocol;

    ngx_chain_t                      *out;
    ngx_http_request_t               *main;
    ngx_http_request_t               *parent;
    ngx_http_postponed_request_t     *postponed;
    ngx_http_post_subrequest_t       *post_subrequest;

    uint32_t                          in_addr;
    ngx_uint_t                        port;
    ngx_str_t                        *port_text;    /* ":80" */
    ngx_http_virtual_names_t         *virtual_names;

    ngx_int_t                         phase_handler;
    ngx_http_handler_pt               content_handler;
    ngx_uint_t                        access_code;

    ngx_http_variable_value_t        *variables;

    size_t                            limit_rate;

    /* used to learn the Apache compatible response length without a header */
    size_t                            header_size;

    off_t                             request_length;

    ngx_uint_t                        err_status;

    ngx_http_connection_t            *http_connection;

    ngx_http_log_handler_pt           log_handler;

    ngx_http_cleanup_t               *cleanup;

    unsigned                          http_state:4;

    /* URI with "/." and on Win32 with "//" */
    unsigned                          complex_uri:1;

    /* URI with "%" */
    unsigned                          quoted_uri:1;

    /* URI with "+" */
    unsigned                          plus_in_uri:1;

    /* URI with "\0" or "%00" */
    unsigned                          zero_in_uri:1;

    unsigned                          invalid_header:1;

    unsigned                          valid_location:1;
    unsigned                          valid_unparsed_uri:1;
    unsigned                          uri_changed:1;
    unsigned                          uri_changes:4;

    unsigned                          request_body_in_single_buf:1;
    unsigned                          request_body_in_file_only:1;
    unsigned                          request_body_in_persistent_file:1;
    unsigned                          request_body_in_clean_file:1;
    unsigned                          request_body_file_group_access:1;
    unsigned                          request_body_file_log_level:3;

    unsigned                          fast_subrequest:1;
    unsigned                          subrequest_in_memory:1;

    unsigned                          gzip:2;

    unsigned                          proxy:1;
    unsigned                          bypass_cache:1;
    unsigned                          no_cache:1;

#if (NGX_HTTP_REALIP)

    /*
     * instead of using the request context data in ngx_http_realip_module
     * we use the single bit in the request structure
     */
    unsigned                          realip_set:1;

#endif

    /*
     * instead of using the request context data in ngx_http_limit_zone_module
     * we use the single bit in the request structure
     */
    unsigned                          limit_zone_set:1;

#if 0
    unsigned                          cacheable:1;
#endif

    unsigned                          pipeline:1;
    unsigned                          plain_http:1;
    unsigned                          chunked:1;
    unsigned                          header_only:1;
    unsigned                          zero_body:1;
    unsigned                          keepalive:1;
    unsigned                          lingering_close:1;
    unsigned                          discard_body:1;
    unsigned                          internal:1;
    unsigned                          error_page:1;
    unsigned                          post_action:1;
    unsigned                          request_complete:1;
    unsigned                          request_output:1;
    unsigned                          header_sent:1;
    unsigned                          done:1;
    unsigned                          utf8:1;

    unsigned                          buffered:4;

    unsigned                          main_filter_need_in_memory:1;
    unsigned                          filter_need_in_memory:1;
    unsigned                          filter_need_temporary:1;
    unsigned                          allow_ranges:1;

#if (NGX_STAT_STUB)
    unsigned                          stat_reading:1;
    unsigned                          stat_writing:1;
#endif

    unsigned                          subrequests:8;

    /* used to parse HTTP headers */

    ngx_uint_t                        state;
    u_char                           *uri_start;
    u_char                           *uri_end;
    u_char                           *uri_ext;
    u_char                           *args_start;
    u_char                           *request_start;
    u_char                           *request_end;
    u_char                           *method_end;
    u_char                           *schema_start;
    u_char                           *schema_end;
    u_char                           *host_start;
    u_char                           *host_end;
    u_char                           *port_start;
    u_char                           *port_end;
    u_char                           *header_name_start;
    u_char                           *header_name_end;
    u_char                           *header_start;
    u_char                           *header_end;

    unsigned                          http_minor:16;
    unsigned                          http_major:16;

    ngx_uint_t                        header_hash;
    ngx_uint_t                        lowcase_index;
    u_char                            lowcase_header[NGX_HTTP_LC_HEADER_LEN];
};


extern ngx_http_header_t       ngx_http_headers_in[];
extern ngx_http_header_out_t   ngx_http_headers_out[];


#endif /* _NGX_HTTP_REQUEST_H_INCLUDED_ */