本文共 6019 字,大约阅读时间需要 20 分钟。
ngx_http_request_s是nginx中非常重要的一个结构体,贯穿于htpp请求处理的整个过程中。
下面解释了ngx_http_request_s结构体中与HTTP框架相关的重要的成员变量。
- struct ngx_http_request_s {
- uint32_t signature;
-
-
- 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;
-
- #if (NGX_HTTP_CACHE)
- ngx_http_cache_t *cache;
- #endif
-
-
- ngx_http_upstream_t *upstream;
- ngx_array_t *upstream_states;
-
-
-
- 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;
-
- ngx_http_posted_request_t *posted_requests;
-
-
- ngx_int_t phase_handler;
-
- ngx_http_handler_pt content_handler;
-
- ngx_uint_t access_code;
-
- ngx_http_variable_value_t *variables;
-
- #if (NGX_PCRE)
- ngx_uint_t ncaptures;
- int *captures;
- u_char *captures_data;
- #endif
-
- size_t limit_rate;
-
-
- size_t header_size;
-
-
- off_t request_length;
-
- ngx_uint_t err_status;
-
- ngx_http_connection_t *http_connection;
- #if (NGX_HTTP_SPDY)
- ngx_http_spdy_stream_t *spdy_stream;
- #endif
-
- ngx_http_log_handler_pt log_handler;
-
-
- ngx_http_cleanup_t *cleanup;
-
- unsigned subrequests:8;
-
-
- unsigned count:8;
-
- unsigned blocked:8;
-
-
- unsigned aio:1;
-
- unsigned http_state:4;
-
-
- unsigned complex_uri:1;
-
-
- unsigned quoted_uri:1;
-
-
- unsigned plus_in_uri:1;
-
-
- unsigned space_in_uri:1;
-
- unsigned invalid_header:1;
-
- unsigned add_uri_to_alias: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 subrequest_in_memory:1;
- unsigned waited:1;
-
- #if (NGX_HTTP_CACHE)
- unsigned cached:1;
- #endif
-
- #if (NGX_HTTP_GZIP)
- unsigned gzip_tested:1;
- unsigned gzip_ok:1;
- unsigned gzip_vary:1;
- #endif
-
- unsigned proxy:1;
- unsigned bypass_cache:1;
- unsigned no_cache:1;
-
-
- unsigned limit_conn_set:1;
- unsigned limit_req_set:1;
-
- #if 0
- unsigned cacheable:1;
- #endif
-
- unsigned pipeline:1;
- unsigned chunked:1;
- unsigned header_only:1;
-
- unsigned keepalive:1;
-
- unsigned lingering_close:1;
-
- unsigned discard_body:1;
-
- unsigned internal:1;
- unsigned error_page:1;
- unsigned ignore_content_encoding:1;
- unsigned filter_finalize:1;
- unsigned post_action:1;
- unsigned request_complete:1;
- unsigned request_output:1;
-
- unsigned header_sent:1;
- unsigned expect_tested:1;
- unsigned root_tested:1;
- unsigned done:1;
- unsigned logged: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
-
-
-
-
- ngx_uint_t state;
-
- ngx_uint_t header_hash;
- ngx_uint_t lowcase_index;
- u_char lowcase_header[NGX_HTTP_LC_HEADER_LEN];
-
- u_char *header_name_start;
- u_char *header_name_end;
- u_char *header_start;
- u_char *header_end;
-
-
-
- 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;
-
- unsigned http_minor:16;
- unsigned http_major:16;
- };
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