| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #ifndef _NGX_HTTP_UPSTREAM_H_INCLUDED_ |
| #define _NGX_HTTP_UPSTREAM_H_INCLUDED_ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| #include <ngx_event_connect.h> |
| #include <ngx_event_pipe.h> |
| #include <ngx_http.h> |
| |
| |
| #define NGX_HTTP_UPSTREAM_FT_ERROR 0x00000002 |
| #define NGX_HTTP_UPSTREAM_FT_TIMEOUT 0x00000004 |
| #define NGX_HTTP_UPSTREAM_FT_INVALID_HEADER 0x00000008 |
| #define NGX_HTTP_UPSTREAM_FT_HTTP_500 0x00000010 |
| #define NGX_HTTP_UPSTREAM_FT_HTTP_502 0x00000020 |
| #define NGX_HTTP_UPSTREAM_FT_HTTP_503 0x00000040 |
| #define NGX_HTTP_UPSTREAM_FT_HTTP_504 0x00000080 |
| #define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x00000100 |
| #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00000200 |
| #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00000400 |
| #define NGX_HTTP_UPSTREAM_FT_NOLIVE 0x40000000 |
| #define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000 |
| |
| #define NGX_HTTP_UPSTREAM_FT_STATUS (NGX_HTTP_UPSTREAM_FT_HTTP_500 \ |
| |NGX_HTTP_UPSTREAM_FT_HTTP_502 \ |
| |NGX_HTTP_UPSTREAM_FT_HTTP_503 \ |
| |NGX_HTTP_UPSTREAM_FT_HTTP_504 \ |
| |NGX_HTTP_UPSTREAM_FT_HTTP_404) |
| |
| #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40 |
| |
| |
| typedef struct { |
| ngx_msec_t bl_time; |
| ngx_uint_t bl_state; |
| |
| ngx_uint_t status; |
| time_t response_sec; |
| ngx_uint_t response_msec; |
| off_t response_length; |
| |
| ngx_str_t *peer; |
| } ngx_http_upstream_state_t; |
| |
| |
| typedef struct { |
| ngx_hash_t headers_in_hash; |
| ngx_array_t upstreams; |
| /* ngx_http_upstream_srv_conf_t */ |
| } ngx_http_upstream_main_conf_t; |
| |
| typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t; |
| |
| typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf, |
| ngx_http_upstream_srv_conf_t *us); |
| typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r, |
| ngx_http_upstream_srv_conf_t *us); |
| |
| |
| typedef struct { |
| ngx_http_upstream_init_pt init_upstream; |
| ngx_http_upstream_init_peer_pt init; |
| void *data; |
| } ngx_http_upstream_peer_t; |
| |
| |
| typedef struct { |
| ngx_peer_addr_t *addrs; |
| ngx_uint_t naddrs; |
| ngx_uint_t weight; |
| ngx_uint_t max_fails; |
| time_t fail_timeout; |
| |
| unsigned down:1; |
| unsigned backup:1; |
| } ngx_http_upstream_server_t; |
| |
| |
| #define NGX_HTTP_UPSTREAM_CREATE 0x0001 |
| #define NGX_HTTP_UPSTREAM_WEIGHT 0x0002 |
| #define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004 |
| #define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008 |
| #define NGX_HTTP_UPSTREAM_DOWN 0x0010 |
| #define NGX_HTTP_UPSTREAM_BACKUP 0x0020 |
| |
| |
| struct ngx_http_upstream_srv_conf_s { |
| ngx_http_upstream_peer_t peer; |
| void **srv_conf; |
| |
| ngx_array_t *servers; /* ngx_http_upstream_server_t */ |
| |
| ngx_uint_t flags; |
| ngx_str_t host; |
| u_char *file_name; |
| ngx_uint_t line; |
| in_port_t port; |
| in_port_t default_port; |
| }; |
| |
| |
| typedef struct { |
| ngx_http_upstream_srv_conf_t *upstream; |
| |
| ngx_msec_t connect_timeout; |
| ngx_msec_t send_timeout; |
| ngx_msec_t read_timeout; |
| ngx_msec_t timeout; |
| |
| size_t send_lowat; |
| size_t buffer_size; |
| |
| size_t busy_buffers_size; |
| size_t max_temp_file_size; |
| size_t temp_file_write_size; |
| |
| size_t busy_buffers_size_conf; |
| size_t max_temp_file_size_conf; |
| size_t temp_file_write_size_conf; |
| |
| ngx_uint_t next_upstream; |
| ngx_uint_t store_access; |
| |
| ngx_bufs_t bufs; |
| |
| ngx_flag_t buffering; |
| ngx_flag_t pass_request_headers; |
| ngx_flag_t pass_request_body; |
| |
| ngx_flag_t ignore_client_abort; |
| ngx_flag_t intercept_errors; |
| ngx_flag_t cyclic_temp_file; |
| |
| ngx_path_t *temp_path; |
| |
| ngx_hash_t hide_headers_hash; |
| ngx_array_t *hide_headers; |
| ngx_array_t *pass_headers; |
| |
| ngx_array_t *store_lengths; |
| ngx_array_t *store_values; |
| |
| signed store:2; |
| unsigned intercept_404:1; |
| unsigned change_buffering:1; |
| |
| #if (NGX_HTTP_SSL) |
| ngx_ssl_t *ssl; |
| ngx_flag_t ssl_session_reuse; |
| #endif |
| |
| } ngx_http_upstream_conf_t; |
| |
| |
| typedef struct { |
| ngx_str_t name; |
| ngx_http_header_handler_pt handler; |
| ngx_uint_t offset; |
| ngx_http_header_handler_pt copy_handler; |
| ngx_uint_t conf; |
| ngx_uint_t redirect; /* unsigned redirect:1; */ |
| } ngx_http_upstream_header_t; |
| |
| |
| typedef struct { |
| ngx_list_t headers; |
| |
| ngx_uint_t status_n; |
| ngx_str_t status_line; |
| |
| ngx_table_elt_t *status; |
| ngx_table_elt_t *date; |
| ngx_table_elt_t *server; |
| ngx_table_elt_t *connection; |
| |
| ngx_table_elt_t *expires; |
| ngx_table_elt_t *etag; |
| ngx_table_elt_t *x_accel_expires; |
| ngx_table_elt_t *x_accel_redirect; |
| ngx_table_elt_t *x_accel_limit_rate; |
| |
| ngx_table_elt_t *content_type; |
| ngx_table_elt_t *content_length; |
| |
| ngx_table_elt_t *last_modified; |
| ngx_table_elt_t *location; |
| ngx_table_elt_t *accept_ranges; |
| ngx_table_elt_t *www_authenticate; |
| |
| #if (NGX_HTTP_GZIP) |
| ngx_table_elt_t *content_encoding; |
| #endif |
| |
| off_t content_length_n; |
| |
| ngx_array_t cache_control; |
| } ngx_http_upstream_headers_in_t; |
| |
| |
| typedef struct { |
| ngx_str_t host; |
| in_port_t port; |
| ngx_uint_t no_port; /* unsigned no_port:1 */ |
| |
| ngx_uint_t naddrs; |
| in_addr_t *addrs; |
| |
| struct sockaddr *sockaddr; |
| socklen_t socklen; |
| |
| ngx_resolver_ctx_t *ctx; |
| } ngx_http_upstream_resolved_t; |
| |
| |
| typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| |
| |
| struct ngx_http_upstream_s { |
| ngx_http_upstream_handler_pt read_event_handler; |
| ngx_http_upstream_handler_pt write_event_handler; |
| |
| ngx_peer_connection_t peer; |
| |
| ngx_event_pipe_t *pipe; |
| |
| ngx_chain_t *request_bufs; |
| |
| ngx_output_chain_ctx_t output; |
| ngx_chain_writer_ctx_t writer; |
| |
| ngx_http_upstream_conf_t *conf; |
| |
| ngx_http_upstream_headers_in_t headers_in; |
| |
| ngx_http_upstream_resolved_t *resolved; |
| |
| ngx_buf_t buffer; |
| size_t length; |
| |
| ngx_chain_t *out_bufs; |
| ngx_chain_t *busy_bufs; |
| ngx_chain_t *free_bufs; |
| |
| ngx_int_t (*input_filter_init)(void *data); |
| ngx_int_t (*input_filter)(void *data, ssize_t bytes); |
| void *input_filter_ctx; |
| |
| ngx_int_t (*create_request)(ngx_http_request_t *r); |
| ngx_int_t (*reinit_request)(ngx_http_request_t *r); |
| ngx_int_t (*process_header)(ngx_http_request_t *r); |
| void (*abort_request)(ngx_http_request_t *r); |
| void (*finalize_request)(ngx_http_request_t *r, |
| ngx_int_t rc); |
| ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r, |
| ngx_table_elt_t *h, size_t prefix); |
| |
| ngx_msec_t timeout; |
| |
| ngx_http_upstream_state_t *state; |
| |
| ngx_str_t method; |
| ngx_str_t schema; |
| ngx_str_t uri; |
| |
| ngx_http_cleanup_pt *cleanup; |
| |
| unsigned store:1; |
| unsigned cacheable:1; |
| unsigned accel:1; |
| unsigned ssl:1; |
| |
| unsigned buffering:1; |
| |
| unsigned request_sent:1; |
| unsigned header_sent:1; |
| }; |
| |
| |
| typedef struct { |
| ngx_uint_t status; |
| ngx_uint_t mask; |
| } ngx_http_upstream_next_t; |
| |
| |
| ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| |
| void ngx_http_upstream_init(ngx_http_request_t *r); |
| ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf, |
| ngx_url_t *u, ngx_uint_t flags); |
| ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf, |
| ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev, |
| ngx_str_t *default_hide_headers, ngx_hash_init_t *hash); |
| |
| |
| #define ngx_http_conf_upstream_srv_conf(uscf, module) \ |
| uscf->srv_conf[module.ctx_index] |
| |
| |
| extern ngx_module_t ngx_http_upstream_module; |
| |
| |
| #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */ |