| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| |
| |
| #if (NGX_HTTP_CACHE) |
| static ngx_int_t ngx_http_upstream_cache(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static ngx_int_t ngx_http_upstream_cache_get(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_http_file_cache_t **cache); |
| static ngx_int_t ngx_http_upstream_cache_send(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static ngx_int_t ngx_http_upstream_cache_background_update( |
| ngx_http_request_t *r, ngx_http_upstream_t *u); |
| static ngx_int_t ngx_http_upstream_cache_check_range(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static ngx_int_t ngx_http_upstream_cache_status(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_upstream_cache_last_modified(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_upstream_cache_etag(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| #endif |
| |
| static void ngx_http_upstream_init_request(ngx_http_request_t *r); |
| static void ngx_http_upstream_resolve_handler(ngx_resolver_ctx_t *ctx); |
| static void ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r); |
| static void ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r); |
| static void ngx_http_upstream_check_broken_connection(ngx_http_request_t *r, |
| ngx_event_t *ev); |
| static void ngx_http_upstream_connect(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static ngx_int_t ngx_http_upstream_reinit(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_send_request(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_uint_t do_write); |
| static ngx_int_t ngx_http_upstream_send_request_body(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_uint_t do_write); |
| static void ngx_http_upstream_send_request_handler(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_read_request_handler(ngx_http_request_t *r); |
| static void ngx_http_upstream_process_header(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static ngx_int_t ngx_http_upstream_test_next(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static ngx_int_t ngx_http_upstream_intercept_errors(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static ngx_int_t ngx_http_upstream_test_connect(ngx_connection_t *c); |
| static ngx_int_t ngx_http_upstream_process_headers(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static ngx_int_t ngx_http_upstream_process_trailers(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_send_response(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_upgrade(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_upgraded_read_downstream(ngx_http_request_t *r); |
| static void ngx_http_upstream_upgraded_write_downstream(ngx_http_request_t *r); |
| static void ngx_http_upstream_upgraded_read_upstream(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_upgraded_write_upstream(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_process_upgraded(ngx_http_request_t *r, |
| ngx_uint_t from_upstream, ngx_uint_t do_write); |
| static void |
| ngx_http_upstream_process_non_buffered_downstream(ngx_http_request_t *r); |
| static void |
| ngx_http_upstream_process_non_buffered_upstream(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void |
| ngx_http_upstream_process_non_buffered_request(ngx_http_request_t *r, |
| ngx_uint_t do_write); |
| static ngx_int_t ngx_http_upstream_non_buffered_filter_init(void *data); |
| static ngx_int_t ngx_http_upstream_non_buffered_filter(void *data, |
| ssize_t bytes); |
| #if (NGX_THREADS) |
| static ngx_int_t ngx_http_upstream_thread_handler(ngx_thread_task_t *task, |
| ngx_file_t *file); |
| static void ngx_http_upstream_thread_event_handler(ngx_event_t *ev); |
| #endif |
| static ngx_int_t ngx_http_upstream_output_filter(void *data, |
| ngx_chain_t *chain); |
| static void ngx_http_upstream_process_downstream(ngx_http_request_t *r); |
| static void ngx_http_upstream_process_upstream(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_process_request(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_store(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_dummy_handler(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void ngx_http_upstream_next(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_uint_t ft_type); |
| static void ngx_http_upstream_cleanup(void *data); |
| static void ngx_http_upstream_finalize_request(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_int_t rc); |
| |
| static ngx_int_t ngx_http_upstream_process_header_line(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_content_length(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_last_modified(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_set_cookie(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t |
| ngx_http_upstream_process_cache_control(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_ignore_header_line(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_expires(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_accel_expires(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_limit_rate(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_buffering(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_charset(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_connection(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t |
| ngx_http_upstream_process_transfer_encoding(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_process_vary(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_copy_header_line(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t |
| ngx_http_upstream_copy_multi_header_lines(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_copy_content_type(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_copy_last_modified(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_rewrite_location(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_rewrite_set_cookie(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| static ngx_int_t ngx_http_upstream_copy_allow_ranges(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| |
| #if (NGX_HTTP_GZIP) |
| static ngx_int_t ngx_http_upstream_copy_content_encoding(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset); |
| #endif |
| |
| static ngx_int_t ngx_http_upstream_add_variables(ngx_conf_t *cf); |
| static ngx_int_t ngx_http_upstream_addr_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_upstream_status_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_upstream_response_time_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_upstream_response_length_variable( |
| ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_upstream_trailer_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| static ngx_int_t ngx_http_upstream_cookie_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data); |
| |
| static char *ngx_http_upstream(ngx_conf_t *cf, ngx_command_t *cmd, void *dummy); |
| static char *ngx_http_upstream_server(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf); |
| |
| static ngx_int_t ngx_http_upstream_set_local(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_http_upstream_local_t *local); |
| |
| static void *ngx_http_upstream_create_main_conf(ngx_conf_t *cf); |
| static char *ngx_http_upstream_init_main_conf(ngx_conf_t *cf, void *conf); |
| |
| #if (NGX_HTTP_SSL) |
| static void ngx_http_upstream_ssl_init_connection(ngx_http_request_t *, |
| ngx_http_upstream_t *u, ngx_connection_t *c); |
| static void ngx_http_upstream_ssl_handshake_handler(ngx_connection_t *c); |
| static void ngx_http_upstream_ssl_handshake(ngx_http_request_t *, |
| ngx_http_upstream_t *u, ngx_connection_t *c); |
| static ngx_int_t ngx_http_upstream_ssl_name(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_connection_t *c); |
| #endif |
| |
| |
| static ngx_http_upstream_header_t ngx_http_upstream_headers_in[] = { |
| |
| { ngx_string("Status"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, status), |
| ngx_http_upstream_copy_header_line, 0, 0 }, |
| |
| { ngx_string("Content-Type"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, content_type), |
| ngx_http_upstream_copy_content_type, 0, 1 }, |
| |
| { ngx_string("Content-Length"), |
| ngx_http_upstream_process_content_length, 0, |
| ngx_http_upstream_ignore_header_line, 0, 0 }, |
| |
| { ngx_string("Date"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, date), |
| ngx_http_upstream_copy_header_line, |
| offsetof(ngx_http_headers_out_t, date), 0 }, |
| |
| { ngx_string("Last-Modified"), |
| ngx_http_upstream_process_last_modified, 0, |
| ngx_http_upstream_copy_last_modified, 0, 0 }, |
| |
| { ngx_string("ETag"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, etag), |
| ngx_http_upstream_copy_header_line, |
| offsetof(ngx_http_headers_out_t, etag), 0 }, |
| |
| { ngx_string("Server"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, server), |
| ngx_http_upstream_copy_header_line, |
| offsetof(ngx_http_headers_out_t, server), 0 }, |
| |
| { ngx_string("WWW-Authenticate"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, www_authenticate), |
| ngx_http_upstream_copy_header_line, 0, 0 }, |
| |
| { ngx_string("Location"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, location), |
| ngx_http_upstream_rewrite_location, 0, 0 }, |
| |
| { ngx_string("Refresh"), |
| ngx_http_upstream_ignore_header_line, 0, |
| ngx_http_upstream_rewrite_refresh, 0, 0 }, |
| |
| { ngx_string("Set-Cookie"), |
| ngx_http_upstream_process_set_cookie, |
| offsetof(ngx_http_upstream_headers_in_t, cookies), |
| ngx_http_upstream_rewrite_set_cookie, 0, 1 }, |
| |
| { ngx_string("Content-Disposition"), |
| ngx_http_upstream_ignore_header_line, 0, |
| ngx_http_upstream_copy_header_line, 0, 1 }, |
| |
| { ngx_string("Cache-Control"), |
| ngx_http_upstream_process_cache_control, 0, |
| ngx_http_upstream_copy_multi_header_lines, |
| offsetof(ngx_http_headers_out_t, cache_control), 1 }, |
| |
| { ngx_string("Expires"), |
| ngx_http_upstream_process_expires, 0, |
| ngx_http_upstream_copy_header_line, |
| offsetof(ngx_http_headers_out_t, expires), 1 }, |
| |
| { ngx_string("Accept-Ranges"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, accept_ranges), |
| ngx_http_upstream_copy_allow_ranges, |
| offsetof(ngx_http_headers_out_t, accept_ranges), 1 }, |
| |
| { ngx_string("Content-Range"), |
| ngx_http_upstream_ignore_header_line, 0, |
| ngx_http_upstream_copy_header_line, |
| offsetof(ngx_http_headers_out_t, content_range), 0 }, |
| |
| { ngx_string("Connection"), |
| ngx_http_upstream_process_connection, 0, |
| ngx_http_upstream_ignore_header_line, 0, 0 }, |
| |
| { ngx_string("Keep-Alive"), |
| ngx_http_upstream_ignore_header_line, 0, |
| ngx_http_upstream_ignore_header_line, 0, 0 }, |
| |
| { ngx_string("Vary"), |
| ngx_http_upstream_process_vary, 0, |
| ngx_http_upstream_copy_header_line, 0, 0 }, |
| |
| { ngx_string("Link"), |
| ngx_http_upstream_ignore_header_line, 0, |
| ngx_http_upstream_copy_multi_header_lines, |
| offsetof(ngx_http_headers_out_t, link), 0 }, |
| |
| { ngx_string("X-Accel-Expires"), |
| ngx_http_upstream_process_accel_expires, 0, |
| ngx_http_upstream_copy_header_line, 0, 0 }, |
| |
| { ngx_string("X-Accel-Redirect"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, x_accel_redirect), |
| ngx_http_upstream_copy_header_line, 0, 0 }, |
| |
| { ngx_string("X-Accel-Limit-Rate"), |
| ngx_http_upstream_process_limit_rate, 0, |
| ngx_http_upstream_copy_header_line, 0, 0 }, |
| |
| { ngx_string("X-Accel-Buffering"), |
| ngx_http_upstream_process_buffering, 0, |
| ngx_http_upstream_copy_header_line, 0, 0 }, |
| |
| { ngx_string("X-Accel-Charset"), |
| ngx_http_upstream_process_charset, 0, |
| ngx_http_upstream_copy_header_line, 0, 0 }, |
| |
| { ngx_string("Transfer-Encoding"), |
| ngx_http_upstream_process_transfer_encoding, 0, |
| ngx_http_upstream_ignore_header_line, 0, 0 }, |
| |
| #if (NGX_HTTP_GZIP) |
| { ngx_string("Content-Encoding"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, content_encoding), |
| ngx_http_upstream_copy_content_encoding, 0, 0 }, |
| #endif |
| |
| { ngx_null_string, NULL, 0, NULL, 0, 0 } |
| }; |
| |
| |
| static ngx_command_t ngx_http_upstream_commands[] = { |
| |
| { ngx_string("upstream"), |
| NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE1, |
| ngx_http_upstream, |
| 0, |
| 0, |
| NULL }, |
| |
| { ngx_string("server"), |
| NGX_HTTP_UPS_CONF|NGX_CONF_1MORE, |
| ngx_http_upstream_server, |
| NGX_HTTP_SRV_CONF_OFFSET, |
| 0, |
| NULL }, |
| |
| ngx_null_command |
| }; |
| |
| |
| static ngx_http_module_t ngx_http_upstream_module_ctx = { |
| ngx_http_upstream_add_variables, /* preconfiguration */ |
| NULL, /* postconfiguration */ |
| |
| ngx_http_upstream_create_main_conf, /* create main configuration */ |
| ngx_http_upstream_init_main_conf, /* init main configuration */ |
| |
| NULL, /* create server configuration */ |
| NULL, /* merge server configuration */ |
| |
| NULL, /* create location configuration */ |
| NULL /* merge location configuration */ |
| }; |
| |
| |
| ngx_module_t ngx_http_upstream_module = { |
| NGX_MODULE_V1, |
| &ngx_http_upstream_module_ctx, /* module context */ |
| ngx_http_upstream_commands, /* module directives */ |
| NGX_HTTP_MODULE, /* module type */ |
| NULL, /* init master */ |
| NULL, /* init module */ |
| NULL, /* init process */ |
| NULL, /* init thread */ |
| NULL, /* exit thread */ |
| NULL, /* exit process */ |
| NULL, /* exit master */ |
| NGX_MODULE_V1_PADDING |
| }; |
| |
| |
| static ngx_http_variable_t ngx_http_upstream_vars[] = { |
| |
| { ngx_string("upstream_addr"), NULL, |
| ngx_http_upstream_addr_variable, 0, |
| NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
| |
| { ngx_string("upstream_status"), NULL, |
| ngx_http_upstream_status_variable, 0, |
| NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
| |
| { ngx_string("upstream_connect_time"), NULL, |
| ngx_http_upstream_response_time_variable, 2, |
| NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
| |
| { ngx_string("upstream_header_time"), NULL, |
| ngx_http_upstream_response_time_variable, 1, |
| NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
| |
| { ngx_string("upstream_response_time"), NULL, |
| ngx_http_upstream_response_time_variable, 0, |
| NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
| |
| { ngx_string("upstream_response_length"), NULL, |
| ngx_http_upstream_response_length_variable, 0, |
| NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
| |
| { ngx_string("upstream_bytes_received"), NULL, |
| ngx_http_upstream_response_length_variable, 1, |
| NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
| |
| #if (NGX_HTTP_CACHE) |
| |
| { ngx_string("upstream_cache_status"), NULL, |
| ngx_http_upstream_cache_status, 0, |
| NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
| |
| { ngx_string("upstream_cache_last_modified"), NULL, |
| ngx_http_upstream_cache_last_modified, 0, |
| NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 }, |
| |
| { ngx_string("upstream_cache_etag"), NULL, |
| ngx_http_upstream_cache_etag, 0, |
| NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 }, |
| |
| #endif |
| |
| { ngx_string("upstream_http_"), NULL, ngx_http_upstream_header_variable, |
| 0, NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_PREFIX, 0 }, |
| |
| { ngx_string("upstream_trailer_"), NULL, ngx_http_upstream_trailer_variable, |
| 0, NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_PREFIX, 0 }, |
| |
| { ngx_string("upstream_cookie_"), NULL, ngx_http_upstream_cookie_variable, |
| 0, NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_PREFIX, 0 }, |
| |
| ngx_http_null_variable |
| }; |
| |
| |
| static ngx_http_upstream_next_t ngx_http_upstream_next_errors[] = { |
| { 500, NGX_HTTP_UPSTREAM_FT_HTTP_500 }, |
| { 502, NGX_HTTP_UPSTREAM_FT_HTTP_502 }, |
| { 503, NGX_HTTP_UPSTREAM_FT_HTTP_503 }, |
| { 504, NGX_HTTP_UPSTREAM_FT_HTTP_504 }, |
| { 403, NGX_HTTP_UPSTREAM_FT_HTTP_403 }, |
| { 404, NGX_HTTP_UPSTREAM_FT_HTTP_404 }, |
| { 429, NGX_HTTP_UPSTREAM_FT_HTTP_429 }, |
| { 0, 0 } |
| }; |
| |
| |
| ngx_conf_bitmask_t ngx_http_upstream_cache_method_mask[] = { |
| { ngx_string("GET"), NGX_HTTP_GET }, |
| { ngx_string("HEAD"), NGX_HTTP_HEAD }, |
| { ngx_string("POST"), NGX_HTTP_POST }, |
| { ngx_null_string, 0 } |
| }; |
| |
| |
| ngx_conf_bitmask_t ngx_http_upstream_ignore_headers_masks[] = { |
| { ngx_string("X-Accel-Redirect"), NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT }, |
| { ngx_string("X-Accel-Expires"), NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES }, |
| { ngx_string("X-Accel-Limit-Rate"), NGX_HTTP_UPSTREAM_IGN_XA_LIMIT_RATE }, |
| { ngx_string("X-Accel-Buffering"), NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING }, |
| { ngx_string("X-Accel-Charset"), NGX_HTTP_UPSTREAM_IGN_XA_CHARSET }, |
| { ngx_string("Expires"), NGX_HTTP_UPSTREAM_IGN_EXPIRES }, |
| { ngx_string("Cache-Control"), NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL }, |
| { ngx_string("Set-Cookie"), NGX_HTTP_UPSTREAM_IGN_SET_COOKIE }, |
| { ngx_string("Vary"), NGX_HTTP_UPSTREAM_IGN_VARY }, |
| { ngx_null_string, 0 } |
| }; |
| |
| |
| ngx_int_t |
| ngx_http_upstream_create(ngx_http_request_t *r) |
| { |
| ngx_http_upstream_t *u; |
| |
| u = r->upstream; |
| |
| if (u && u->cleanup) { |
| r->main->count++; |
| ngx_http_upstream_cleanup(r); |
| } |
| |
| u = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_t)); |
| if (u == NULL) { |
| return NGX_ERROR; |
| } |
| |
| r->upstream = u; |
| |
| u->peer.log = r->connection->log; |
| u->peer.log_error = NGX_ERROR_ERR; |
| |
| #if (NGX_HTTP_CACHE) |
| r->cache = NULL; |
| #endif |
| |
| u->headers_in.content_length_n = -1; |
| u->headers_in.last_modified_time = -1; |
| |
| return NGX_OK; |
| } |
| |
| |
| void |
| ngx_http_upstream_init(ngx_http_request_t *r) |
| { |
| ngx_connection_t *c; |
| |
| c = r->connection; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http init upstream, client timer: %d", c->read->timer_set); |
| |
| #if (NGX_HTTP_V2) |
| if (r->stream) { |
| ngx_http_upstream_init_request(r); |
| return; |
| } |
| #endif |
| |
| if (c->read->timer_set) { |
| ngx_del_timer(c->read); |
| } |
| |
| if (ngx_event_flags & NGX_USE_CLEAR_EVENT) { |
| |
| if (!c->write->active) { |
| if (ngx_add_event(c->write, NGX_WRITE_EVENT, NGX_CLEAR_EVENT) |
| == NGX_ERROR) |
| { |
| ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| } |
| } |
| |
| ngx_http_upstream_init_request(r); |
| } |
| |
| |
| static void |
| ngx_http_upstream_init_request(ngx_http_request_t *r) |
| { |
| ngx_str_t *host; |
| ngx_uint_t i; |
| ngx_resolver_ctx_t *ctx, temp; |
| ngx_http_cleanup_t *cln; |
| ngx_http_upstream_t *u; |
| ngx_http_core_loc_conf_t *clcf; |
| ngx_http_upstream_srv_conf_t *uscf, **uscfp; |
| ngx_http_upstream_main_conf_t *umcf; |
| |
| if (r->aio) { |
| return; |
| } |
| |
| u = r->upstream; |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (u->conf->cache) { |
| ngx_int_t rc; |
| |
| rc = ngx_http_upstream_cache(r, u); |
| |
| if (rc == NGX_BUSY) { |
| r->write_event_handler = ngx_http_upstream_init_request; |
| return; |
| } |
| |
| r->write_event_handler = ngx_http_request_empty_handler; |
| |
| if (rc == NGX_ERROR) { |
| ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| if (rc == NGX_OK) { |
| rc = ngx_http_upstream_cache_send(r, u); |
| |
| if (rc == NGX_DONE) { |
| return; |
| } |
| |
| if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) { |
| rc = NGX_DECLINED; |
| r->cached = 0; |
| u->buffer.start = NULL; |
| u->cache_status = NGX_HTTP_CACHE_MISS; |
| u->request_sent = 1; |
| } |
| |
| if (ngx_http_upstream_cache_background_update(r, u) != NGX_OK) { |
| rc = NGX_ERROR; |
| } |
| } |
| |
| if (rc != NGX_DECLINED) { |
| ngx_http_finalize_request(r, rc); |
| return; |
| } |
| } |
| |
| #endif |
| |
| u->store = u->conf->store; |
| |
| if (!u->store && !r->post_action && !u->conf->ignore_client_abort) { |
| r->read_event_handler = ngx_http_upstream_rd_check_broken_connection; |
| r->write_event_handler = ngx_http_upstream_wr_check_broken_connection; |
| } |
| |
| if (r->request_body) { |
| u->request_bufs = r->request_body->bufs; |
| } |
| |
| if (u->create_request(r) != NGX_OK) { |
| ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| if (ngx_http_upstream_set_local(r, u, u->conf->local) != NGX_OK) { |
| ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| u->output.alignment = clcf->directio_alignment; |
| u->output.pool = r->pool; |
| u->output.bufs.num = 1; |
| u->output.bufs.size = clcf->client_body_buffer_size; |
| |
| if (u->output.output_filter == NULL) { |
| u->output.output_filter = ngx_chain_writer; |
| u->output.filter_ctx = &u->writer; |
| } |
| |
| u->writer.pool = r->pool; |
| |
| if (r->upstream_states == NULL) { |
| |
| r->upstream_states = ngx_array_create(r->pool, 1, |
| sizeof(ngx_http_upstream_state_t)); |
| if (r->upstream_states == NULL) { |
| ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| } else { |
| |
| u->state = ngx_array_push(r->upstream_states); |
| if (u->state == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t)); |
| } |
| |
| cln = ngx_http_cleanup_add(r, 0); |
| if (cln == NULL) { |
| ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| cln->handler = ngx_http_upstream_cleanup; |
| cln->data = r; |
| u->cleanup = &cln->handler; |
| |
| if (u->resolved == NULL) { |
| |
| uscf = u->conf->upstream; |
| |
| } else { |
| |
| #if (NGX_HTTP_SSL) |
| u->ssl_name = u->resolved->host; |
| #endif |
| |
| host = &u->resolved->host; |
| |
| umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module); |
| |
| uscfp = umcf->upstreams.elts; |
| |
| for (i = 0; i < umcf->upstreams.nelts; i++) { |
| |
| uscf = uscfp[i]; |
| |
| if (uscf->host.len == host->len |
| && ((uscf->port == 0 && u->resolved->no_port) |
| || uscf->port == u->resolved->port) |
| && ngx_strncasecmp(uscf->host.data, host->data, host->len) == 0) |
| { |
| goto found; |
| } |
| } |
| |
| if (u->resolved->sockaddr) { |
| |
| if (u->resolved->port == 0 |
| && u->resolved->sockaddr->sa_family != AF_UNIX) |
| { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| "no port in upstream \"%V\"", host); |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| if (ngx_http_upstream_create_round_robin_peer(r, u->resolved) |
| != NGX_OK) |
| { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| ngx_http_upstream_connect(r, u); |
| |
| return; |
| } |
| |
| if (u->resolved->port == 0) { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| "no port in upstream \"%V\"", host); |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| temp.name = *host; |
| |
| ctx = ngx_resolve_start(clcf->resolver, &temp); |
| if (ctx == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| if (ctx == NGX_NO_RESOLVER) { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| "no resolver defined to resolve %V", host); |
| |
| ngx_http_upstream_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY); |
| return; |
| } |
| |
| ctx->name = *host; |
| ctx->handler = ngx_http_upstream_resolve_handler; |
| ctx->data = r; |
| ctx->timeout = clcf->resolver_timeout; |
| |
| u->resolved->ctx = ctx; |
| |
| if (ngx_resolve_name(ctx) != NGX_OK) { |
| u->resolved->ctx = NULL; |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| return; |
| } |
| |
| found: |
| |
| if (uscf == NULL) { |
| ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
| "no upstream configuration"); |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| u->upstream = uscf; |
| |
| #if (NGX_HTTP_SSL) |
| u->ssl_name = uscf->host; |
| #endif |
| |
| if (uscf->peer.init(r, uscf) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| u->peer.start_time = ngx_current_msec; |
| |
| if (u->conf->next_upstream_tries |
| && u->peer.tries > u->conf->next_upstream_tries) |
| { |
| u->peer.tries = u->conf->next_upstream_tries; |
| } |
| |
| ngx_http_upstream_connect(r, u); |
| } |
| |
| |
| #if (NGX_HTTP_CACHE) |
| |
| static ngx_int_t |
| ngx_http_upstream_cache(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| ngx_int_t rc; |
| ngx_http_cache_t *c; |
| ngx_http_file_cache_t *cache; |
| |
| c = r->cache; |
| |
| if (c == NULL) { |
| |
| if (!(r->method & u->conf->cache_methods)) { |
| return NGX_DECLINED; |
| } |
| |
| rc = ngx_http_upstream_cache_get(r, u, &cache); |
| |
| if (rc != NGX_OK) { |
| return rc; |
| } |
| |
| if (r->method == NGX_HTTP_HEAD && u->conf->cache_convert_head) { |
| u->method = ngx_http_core_get_method; |
| } |
| |
| if (ngx_http_file_cache_new(r) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| if (u->create_key(r) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| /* TODO: add keys */ |
| |
| ngx_http_file_cache_create_key(r); |
| |
| if (r->cache->header_start + 256 >= u->conf->buffer_size) { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| "%V_buffer_size %uz is not enough for cache key, " |
| "it should be increased to at least %uz", |
| &u->conf->module, u->conf->buffer_size, |
| ngx_align(r->cache->header_start + 256, 1024)); |
| |
| r->cache = NULL; |
| return NGX_DECLINED; |
| } |
| |
| u->cacheable = 1; |
| |
| c = r->cache; |
| |
| c->body_start = u->conf->buffer_size; |
| c->min_uses = u->conf->cache_min_uses; |
| c->file_cache = cache; |
| |
| switch (ngx_http_test_predicates(r, u->conf->cache_bypass)) { |
| |
| case NGX_ERROR: |
| return NGX_ERROR; |
| |
| case NGX_DECLINED: |
| u->cache_status = NGX_HTTP_CACHE_BYPASS; |
| return NGX_DECLINED; |
| |
| default: /* NGX_OK */ |
| break; |
| } |
| |
| c->lock = u->conf->cache_lock; |
| c->lock_timeout = u->conf->cache_lock_timeout; |
| c->lock_age = u->conf->cache_lock_age; |
| |
| u->cache_status = NGX_HTTP_CACHE_MISS; |
| } |
| |
| rc = ngx_http_file_cache_open(r); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http upstream cache: %i", rc); |
| |
| switch (rc) { |
| |
| case NGX_HTTP_CACHE_STALE: |
| |
| if (((u->conf->cache_use_stale & NGX_HTTP_UPSTREAM_FT_UPDATING) |
| || c->stale_updating) && !r->background |
| && u->conf->cache_background_update) |
| { |
| r->cache->background = 1; |
| u->cache_status = rc; |
| rc = NGX_OK; |
| } |
| |
| break; |
| |
| case NGX_HTTP_CACHE_UPDATING: |
| |
| if (((u->conf->cache_use_stale & NGX_HTTP_UPSTREAM_FT_UPDATING) |
| || c->stale_updating) && !r->background) |
| { |
| u->cache_status = rc; |
| rc = NGX_OK; |
| |
| } else { |
| rc = NGX_HTTP_CACHE_STALE; |
| } |
| |
| break; |
| |
| case NGX_OK: |
| u->cache_status = NGX_HTTP_CACHE_HIT; |
| } |
| |
| switch (rc) { |
| |
| case NGX_OK: |
| |
| return NGX_OK; |
| |
| case NGX_HTTP_CACHE_STALE: |
| |
| c->valid_sec = 0; |
| c->updating_sec = 0; |
| c->error_sec = 0; |
| |
| u->buffer.start = NULL; |
| u->cache_status = NGX_HTTP_CACHE_EXPIRED; |
| |
| break; |
| |
| case NGX_DECLINED: |
| |
| if ((size_t) (u->buffer.end - u->buffer.start) < u->conf->buffer_size) { |
| u->buffer.start = NULL; |
| |
| } else { |
| u->buffer.pos = u->buffer.start + c->header_start; |
| u->buffer.last = u->buffer.pos; |
| } |
| |
| break; |
| |
| case NGX_HTTP_CACHE_SCARCE: |
| |
| u->cacheable = 0; |
| |
| break; |
| |
| case NGX_AGAIN: |
| |
| return NGX_BUSY; |
| |
| case NGX_ERROR: |
| |
| return NGX_ERROR; |
| |
| default: |
| |
| /* cached NGX_HTTP_BAD_GATEWAY, NGX_HTTP_GATEWAY_TIME_OUT, etc. */ |
| |
| u->cache_status = NGX_HTTP_CACHE_HIT; |
| |
| return rc; |
| } |
| |
| if (ngx_http_upstream_cache_check_range(r, u) == NGX_DECLINED) { |
| u->cacheable = 0; |
| } |
| |
| r->cached = 0; |
| |
| return NGX_DECLINED; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_cache_get(ngx_http_request_t *r, ngx_http_upstream_t *u, |
| ngx_http_file_cache_t **cache) |
| { |
| ngx_str_t *name, val; |
| ngx_uint_t i; |
| ngx_http_file_cache_t **caches; |
| |
| if (u->conf->cache_zone) { |
| *cache = u->conf->cache_zone->data; |
| return NGX_OK; |
| } |
| |
| if (ngx_http_complex_value(r, u->conf->cache_value, &val) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| if (val.len == 0 |
| || (val.len == 3 && ngx_strncmp(val.data, "off", 3) == 0)) |
| { |
| return NGX_DECLINED; |
| } |
| |
| caches = u->caches->elts; |
| |
| for (i = 0; i < u->caches->nelts; i++) { |
| name = &caches[i]->shm_zone->shm.name; |
| |
| if (name->len == val.len |
| && ngx_strncmp(name->data, val.data, val.len) == 0) |
| { |
| *cache = caches[i]; |
| return NGX_OK; |
| } |
| } |
| |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| "cache \"%V\" not found", &val); |
| |
| return NGX_ERROR; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_cache_send(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| ngx_int_t rc; |
| ngx_http_cache_t *c; |
| |
| r->cached = 1; |
| c = r->cache; |
| |
| if (c->header_start == c->body_start) { |
| r->http_version = NGX_HTTP_VERSION_9; |
| return ngx_http_cache_send(r); |
| } |
| |
| /* TODO: cache stack */ |
| |
| u->buffer = *c->buf; |
| u->buffer.pos += c->header_start; |
| |
| ngx_memzero(&u->headers_in, sizeof(ngx_http_upstream_headers_in_t)); |
| u->headers_in.content_length_n = -1; |
| u->headers_in.last_modified_time = -1; |
| |
| if (ngx_list_init(&u->headers_in.headers, r->pool, 8, |
| sizeof(ngx_table_elt_t)) |
| != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| |
| if (ngx_list_init(&u->headers_in.trailers, r->pool, 2, |
| sizeof(ngx_table_elt_t)) |
| != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| |
| rc = u->process_header(r); |
| |
| if (rc == NGX_OK) { |
| |
| if (ngx_http_upstream_process_headers(r, u) != NGX_OK) { |
| return NGX_DONE; |
| } |
| |
| return ngx_http_cache_send(r); |
| } |
| |
| if (rc == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| if (rc == NGX_AGAIN) { |
| rc = NGX_HTTP_UPSTREAM_INVALID_HEADER; |
| } |
| |
| /* rc == NGX_HTTP_UPSTREAM_INVALID_HEADER */ |
| |
| ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0, |
| "cache file \"%s\" contains invalid header", |
| c->file.name.data); |
| |
| /* TODO: delete file */ |
| |
| return rc; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_cache_background_update(ngx_http_request_t *r, |
| ngx_http_upstream_t *u) |
| { |
| ngx_http_request_t *sr; |
| |
| if (!r->cached || !r->cache->background) { |
| return NGX_OK; |
| } |
| |
| if (r == r->main) { |
| r->preserve_body = 1; |
| } |
| |
| if (ngx_http_subrequest(r, &r->uri, &r->args, &sr, NULL, |
| NGX_HTTP_SUBREQUEST_CLONE |
| |NGX_HTTP_SUBREQUEST_BACKGROUND) |
| != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| |
| sr->header_only = 1; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_cache_check_range(ngx_http_request_t *r, |
| ngx_http_upstream_t *u) |
| { |
| off_t offset; |
| u_char *p, *start; |
| ngx_table_elt_t *h; |
| |
| h = r->headers_in.range; |
| |
| if (h == NULL |
| || !u->cacheable |
| || u->conf->cache_max_range_offset == NGX_MAX_OFF_T_VALUE) |
| { |
| return NGX_OK; |
| } |
| |
| if (u->conf->cache_max_range_offset == 0) { |
| return NGX_DECLINED; |
| } |
| |
| if (h->value.len < 7 |
| || ngx_strncasecmp(h->value.data, (u_char *) "bytes=", 6) != 0) |
| { |
| return NGX_OK; |
| } |
| |
| p = h->value.data + 6; |
| |
| while (*p == ' ') { p++; } |
| |
| if (*p == '-') { |
| return NGX_DECLINED; |
| } |
| |
| start = p; |
| |
| while (*p >= '0' && *p <= '9') { p++; } |
| |
| offset = ngx_atoof(start, p - start); |
| |
| if (offset >= u->conf->cache_max_range_offset) { |
| return NGX_DECLINED; |
| } |
| |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| |
| static void |
| ngx_http_upstream_resolve_handler(ngx_resolver_ctx_t *ctx) |
| { |
| ngx_uint_t run_posted; |
| ngx_connection_t *c; |
| ngx_http_request_t *r; |
| ngx_http_upstream_t *u; |
| ngx_http_upstream_resolved_t *ur; |
| |
| run_posted = ctx->async; |
| |
| r = ctx->data; |
| c = r->connection; |
| |
| u = r->upstream; |
| ur = u->resolved; |
| |
| ngx_http_set_log_request(c->log, r); |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream resolve: \"%V?%V\"", &r->uri, &r->args); |
| |
| if (ctx->state) { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
| "%V could not be resolved (%i: %s)", |
| &ctx->name, ctx->state, |
| ngx_resolver_strerror(ctx->state)); |
| |
| ngx_http_upstream_finalize_request(r, u, NGX_HTTP_BAD_GATEWAY); |
| goto failed; |
| } |
| |
| ur->naddrs = ctx->naddrs; |
| ur->addrs = ctx->addrs; |
| |
| #if (NGX_DEBUG) |
| { |
| u_char text[NGX_SOCKADDR_STRLEN]; |
| ngx_str_t addr; |
| ngx_uint_t i; |
| |
| addr.data = text; |
| |
| for (i = 0; i < ctx->naddrs; i++) { |
| addr.len = ngx_sock_ntop(ur->addrs[i].sockaddr, ur->addrs[i].socklen, |
| text, NGX_SOCKADDR_STRLEN, 0); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "name was resolved to %V", &addr); |
| } |
| } |
| #endif |
| |
| if (ngx_http_upstream_create_round_robin_peer(r, ur) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| goto failed; |
| } |
| |
| ngx_resolve_name_done(ctx); |
| ur->ctx = NULL; |
| |
| u->peer.start_time = ngx_current_msec; |
| |
| if (u->conf->next_upstream_tries |
| && u->peer.tries > u->conf->next_upstream_tries) |
| { |
| u->peer.tries = u->conf->next_upstream_tries; |
| } |
| |
| ngx_http_upstream_connect(r, u); |
| |
| failed: |
| |
| if (run_posted) { |
| ngx_http_run_posted_requests(c); |
| } |
| } |
| |
| |
| static void |
| ngx_http_upstream_handler(ngx_event_t *ev) |
| { |
| ngx_connection_t *c; |
| ngx_http_request_t *r; |
| ngx_http_upstream_t *u; |
| |
| c = ev->data; |
| r = c->data; |
| |
| u = r->upstream; |
| c = r->connection; |
| |
| ngx_http_set_log_request(c->log, r); |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream request: \"%V?%V\"", &r->uri, &r->args); |
| |
| if (ev->delayed && ev->timedout) { |
| ev->delayed = 0; |
| ev->timedout = 0; |
| } |
| |
| if (ev->write) { |
| u->write_event_handler(r, u); |
| |
| } else { |
| u->read_event_handler(r, u); |
| } |
| |
| ngx_http_run_posted_requests(c); |
| } |
| |
| |
| static void |
| ngx_http_upstream_rd_check_broken_connection(ngx_http_request_t *r) |
| { |
| ngx_http_upstream_check_broken_connection(r, r->connection->read); |
| } |
| |
| |
| static void |
| ngx_http_upstream_wr_check_broken_connection(ngx_http_request_t *r) |
| { |
| ngx_http_upstream_check_broken_connection(r, r->connection->write); |
| } |
| |
| |
| static void |
| ngx_http_upstream_check_broken_connection(ngx_http_request_t *r, |
| ngx_event_t *ev) |
| { |
| int n; |
| char buf[1]; |
| ngx_err_t err; |
| ngx_int_t event; |
| ngx_connection_t *c; |
| ngx_http_upstream_t *u; |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ev->log, 0, |
| "http upstream check client, write event:%d, \"%V\"", |
| ev->write, &r->uri); |
| |
| c = r->connection; |
| u = r->upstream; |
| |
| if (c->error) { |
| if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && ev->active) { |
| |
| event = ev->write ? NGX_WRITE_EVENT : NGX_READ_EVENT; |
| |
| if (ngx_del_event(ev, event, 0) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| } |
| |
| if (!u->cacheable) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| } |
| |
| return; |
| } |
| |
| #if (NGX_HTTP_V2) |
| if (r->stream) { |
| return; |
| } |
| #endif |
| |
| #if (NGX_HAVE_KQUEUE) |
| |
| if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
| |
| if (!ev->pending_eof) { |
| return; |
| } |
| |
| ev->eof = 1; |
| c->error = 1; |
| |
| if (ev->kq_errno) { |
| ev->error = 1; |
| } |
| |
| if (!u->cacheable && u->peer.connection) { |
| ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno, |
| "kevent() reported that client prematurely closed " |
| "connection, so upstream connection is closed too"); |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| return; |
| } |
| |
| ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno, |
| "kevent() reported that client prematurely closed " |
| "connection"); |
| |
| if (u->peer.connection == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| } |
| |
| return; |
| } |
| |
| #endif |
| |
| #if (NGX_HAVE_EPOLLRDHUP) |
| |
| if ((ngx_event_flags & NGX_USE_EPOLL_EVENT) && ngx_use_epoll_rdhup) { |
| socklen_t len; |
| |
| if (!ev->pending_eof) { |
| return; |
| } |
| |
| ev->eof = 1; |
| c->error = 1; |
| |
| err = 0; |
| len = sizeof(ngx_err_t); |
| |
| /* |
| * BSDs and Linux return 0 and set a pending error in err |
| * Solaris returns -1 and sets errno |
| */ |
| |
| if (getsockopt(c->fd, SOL_SOCKET, SO_ERROR, (void *) &err, &len) |
| == -1) |
| { |
| err = ngx_socket_errno; |
| } |
| |
| if (err) { |
| ev->error = 1; |
| } |
| |
| if (!u->cacheable && u->peer.connection) { |
| ngx_log_error(NGX_LOG_INFO, ev->log, err, |
| "epoll_wait() reported that client prematurely closed " |
| "connection, so upstream connection is closed too"); |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| return; |
| } |
| |
| ngx_log_error(NGX_LOG_INFO, ev->log, err, |
| "epoll_wait() reported that client prematurely closed " |
| "connection"); |
| |
| if (u->peer.connection == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| } |
| |
| return; |
| } |
| |
| #endif |
| |
| n = recv(c->fd, buf, 1, MSG_PEEK); |
| |
| err = ngx_socket_errno; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ev->log, err, |
| "http upstream recv(): %d", n); |
| |
| if (ev->write && (n >= 0 || err == NGX_EAGAIN)) { |
| return; |
| } |
| |
| if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && ev->active) { |
| |
| event = ev->write ? NGX_WRITE_EVENT : NGX_READ_EVENT; |
| |
| if (ngx_del_event(ev, event, 0) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| } |
| |
| if (n > 0) { |
| return; |
| } |
| |
| if (n == -1) { |
| if (err == NGX_EAGAIN) { |
| return; |
| } |
| |
| ev->error = 1; |
| |
| } else { /* n == 0 */ |
| err = 0; |
| } |
| |
| ev->eof = 1; |
| c->error = 1; |
| |
| if (!u->cacheable && u->peer.connection) { |
| ngx_log_error(NGX_LOG_INFO, ev->log, err, |
| "client prematurely closed connection, " |
| "so upstream connection is closed too"); |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| return; |
| } |
| |
| ngx_log_error(NGX_LOG_INFO, ev->log, err, |
| "client prematurely closed connection"); |
| |
| if (u->peer.connection == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| } |
| } |
| |
| |
| static void |
| ngx_http_upstream_connect(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| ngx_int_t rc; |
| ngx_connection_t *c; |
| |
| r->connection->log->action = "connecting to upstream"; |
| |
| if (u->state && u->state->response_time) { |
| u->state->response_time = ngx_current_msec - u->state->response_time; |
| } |
| |
| u->state = ngx_array_push(r->upstream_states); |
| if (u->state == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t)); |
| |
| u->state->response_time = ngx_current_msec; |
| u->state->connect_time = (ngx_msec_t) -1; |
| u->state->header_time = (ngx_msec_t) -1; |
| |
| rc = ngx_event_connect_peer(&u->peer); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http upstream connect: %i", rc); |
| |
| if (rc == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| u->state->peer = u->peer.name; |
| |
| if (rc == NGX_BUSY) { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live upstreams"); |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_NOLIVE); |
| return; |
| } |
| |
| if (rc == NGX_DECLINED) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| return; |
| } |
| |
| /* rc == NGX_OK || rc == NGX_AGAIN || rc == NGX_DONE */ |
| |
| c = u->peer.connection; |
| |
| c->data = r; |
| |
| c->write->handler = ngx_http_upstream_handler; |
| c->read->handler = ngx_http_upstream_handler; |
| |
| u->write_event_handler = ngx_http_upstream_send_request_handler; |
| u->read_event_handler = ngx_http_upstream_process_header; |
| |
| c->sendfile &= r->connection->sendfile; |
| u->output.sendfile = c->sendfile; |
| |
| if (c->pool == NULL) { |
| |
| /* we need separate pool here to be able to cache SSL connections */ |
| |
| c->pool = ngx_create_pool(128, r->connection->log); |
| if (c->pool == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| } |
| |
| c->log = r->connection->log; |
| c->pool->log = c->log; |
| c->read->log = c->log; |
| c->write->log = c->log; |
| |
| /* init or reinit the ngx_output_chain() and ngx_chain_writer() contexts */ |
| |
| u->writer.out = NULL; |
| u->writer.last = &u->writer.out; |
| u->writer.connection = c; |
| u->writer.limit = 0; |
| |
| if (u->request_sent) { |
| if (ngx_http_upstream_reinit(r, u) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| } |
| |
| if (r->request_body |
| && r->request_body->buf |
| && r->request_body->temp_file |
| && r == r->main) |
| { |
| /* |
| * the r->request_body->buf can be reused for one request only, |
| * the subrequests should allocate their own temporary bufs |
| */ |
| |
| u->output.free = ngx_alloc_chain_link(r->pool); |
| if (u->output.free == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| u->output.free->buf = r->request_body->buf; |
| u->output.free->next = NULL; |
| u->output.allocated = 1; |
| |
| r->request_body->buf->pos = r->request_body->buf->start; |
| r->request_body->buf->last = r->request_body->buf->start; |
| r->request_body->buf->tag = u->output.tag; |
| } |
| |
| u->request_sent = 0; |
| u->request_body_sent = 0; |
| u->request_body_blocked = 0; |
| |
| if (rc == NGX_AGAIN) { |
| ngx_add_timer(c->write, u->conf->connect_timeout); |
| return; |
| } |
| |
| #if (NGX_HTTP_SSL) |
| |
| if (u->ssl && c->ssl == NULL) { |
| ngx_http_upstream_ssl_init_connection(r, u, c); |
| return; |
| } |
| |
| #endif |
| |
| ngx_http_upstream_send_request(r, u, 1); |
| } |
| |
| |
| #if (NGX_HTTP_SSL) |
| |
| static void |
| ngx_http_upstream_ssl_init_connection(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_connection_t *c) |
| { |
| ngx_int_t rc; |
| ngx_http_core_loc_conf_t *clcf; |
| |
| if (ngx_http_upstream_test_connect(c) != NGX_OK) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| return; |
| } |
| |
| if (ngx_ssl_create_connection(u->conf->ssl, c, |
| NGX_SSL_BUFFER|NGX_SSL_CLIENT) |
| != NGX_OK) |
| { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| c->sendfile = 0; |
| u->output.sendfile = 0; |
| |
| if (u->conf->ssl_server_name || u->conf->ssl_verify) { |
| if (ngx_http_upstream_ssl_name(r, u, c) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| } |
| |
| if (u->conf->ssl_session_reuse) { |
| if (u->peer.set_session(&u->peer, u->peer.data) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| /* abbreviated SSL handshake may interact badly with Nagle */ |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| if (clcf->tcp_nodelay && ngx_tcp_nodelay(c) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| } |
| |
| r->connection->log->action = "SSL handshaking to upstream"; |
| |
| rc = ngx_ssl_handshake(c); |
| |
| if (rc == NGX_AGAIN) { |
| |
| if (!c->write->timer_set) { |
| ngx_add_timer(c->write, u->conf->connect_timeout); |
| } |
| |
| c->ssl->handler = ngx_http_upstream_ssl_handshake_handler; |
| return; |
| } |
| |
| ngx_http_upstream_ssl_handshake(r, u, c); |
| } |
| |
| |
| static void |
| ngx_http_upstream_ssl_handshake_handler(ngx_connection_t *c) |
| { |
| ngx_http_request_t *r; |
| ngx_http_upstream_t *u; |
| |
| r = c->data; |
| |
| u = r->upstream; |
| c = r->connection; |
| |
| ngx_http_set_log_request(c->log, r); |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream ssl handshake: \"%V?%V\"", |
| &r->uri, &r->args); |
| |
| ngx_http_upstream_ssl_handshake(r, u, u->peer.connection); |
| |
| ngx_http_run_posted_requests(c); |
| } |
| |
| |
| static void |
| ngx_http_upstream_ssl_handshake(ngx_http_request_t *r, ngx_http_upstream_t *u, |
| ngx_connection_t *c) |
| { |
| long rc; |
| |
| if (c->ssl->handshaked) { |
| |
| if (u->conf->ssl_verify) { |
| rc = SSL_get_verify_result(c->ssl->connection); |
| |
| if (rc != X509_V_OK) { |
| ngx_log_error(NGX_LOG_ERR, c->log, 0, |
| "upstream SSL certificate verify error: (%l:%s)", |
| rc, X509_verify_cert_error_string(rc)); |
| goto failed; |
| } |
| |
| if (ngx_ssl_check_host(c, &u->ssl_name) != NGX_OK) { |
| ngx_log_error(NGX_LOG_ERR, c->log, 0, |
| "upstream SSL certificate does not match \"%V\"", |
| &u->ssl_name); |
| goto failed; |
| } |
| } |
| |
| if (u->conf->ssl_session_reuse) { |
| u->peer.save_session(&u->peer, u->peer.data); |
| } |
| |
| c->write->handler = ngx_http_upstream_handler; |
| c->read->handler = ngx_http_upstream_handler; |
| |
| ngx_http_upstream_send_request(r, u, 1); |
| |
| return; |
| } |
| |
| if (c->write->timedout) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT); |
| return; |
| } |
| |
| failed: |
| |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_ssl_name(ngx_http_request_t *r, ngx_http_upstream_t *u, |
| ngx_connection_t *c) |
| { |
| u_char *p, *last; |
| ngx_str_t name; |
| |
| if (u->conf->ssl_name) { |
| if (ngx_http_complex_value(r, u->conf->ssl_name, &name) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| } else { |
| name = u->ssl_name; |
| } |
| |
| if (name.len == 0) { |
| goto done; |
| } |
| |
| /* |
| * ssl name here may contain port, notably if derived from $proxy_host |
| * or $http_host; we have to strip it |
| */ |
| |
| p = name.data; |
| last = name.data + name.len; |
| |
| if (*p == '[') { |
| p = ngx_strlchr(p, last, ']'); |
| |
| if (p == NULL) { |
| p = name.data; |
| } |
| } |
| |
| p = ngx_strlchr(p, last, ':'); |
| |
| if (p != NULL) { |
| name.len = p - name.data; |
| } |
| |
| if (!u->conf->ssl_server_name) { |
| goto done; |
| } |
| |
| #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME |
| |
| /* as per RFC 6066, literal IPv4 and IPv6 addresses are not permitted */ |
| |
| if (name.len == 0 || *name.data == '[') { |
| goto done; |
| } |
| |
| if (ngx_inet_addr(name.data, name.len) != INADDR_NONE) { |
| goto done; |
| } |
| |
| /* |
| * SSL_set_tlsext_host_name() needs a null-terminated string, |
| * hence we explicitly null-terminate name here |
| */ |
| |
| p = ngx_pnalloc(r->pool, name.len + 1); |
| if (p == NULL) { |
| return NGX_ERROR; |
| } |
| |
| (void) ngx_cpystrn(p, name.data, name.len + 1); |
| |
| name.data = p; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "upstream SSL server name: \"%s\"", name.data); |
| |
| if (SSL_set_tlsext_host_name(c->ssl->connection, |
| (char *) name.data) |
| == 0) |
| { |
| ngx_ssl_error(NGX_LOG_ERR, r->connection->log, 0, |
| "SSL_set_tlsext_host_name(\"%s\") failed", name.data); |
| return NGX_ERROR; |
| } |
| |
| #endif |
| |
| done: |
| |
| u->ssl_name = name; |
| |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_reinit(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| off_t file_pos; |
| ngx_chain_t *cl; |
| |
| if (u->reinit_request(r) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| u->keepalive = 0; |
| u->upgrade = 0; |
| |
| ngx_memzero(&u->headers_in, sizeof(ngx_http_upstream_headers_in_t)); |
| u->headers_in.content_length_n = -1; |
| u->headers_in.last_modified_time = -1; |
| |
| if (ngx_list_init(&u->headers_in.headers, r->pool, 8, |
| sizeof(ngx_table_elt_t)) |
| != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| |
| if (ngx_list_init(&u->headers_in.trailers, r->pool, 2, |
| sizeof(ngx_table_elt_t)) |
| != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| |
| /* reinit the request chain */ |
| |
| file_pos = 0; |
| |
| for (cl = u->request_bufs; cl; cl = cl->next) { |
| cl->buf->pos = cl->buf->start; |
| |
| /* there is at most one file */ |
| |
| if (cl->buf->in_file) { |
| cl->buf->file_pos = file_pos; |
| file_pos = cl->buf->file_last; |
| } |
| } |
| |
| /* reinit the subrequest's ngx_output_chain() context */ |
| |
| if (r->request_body && r->request_body->temp_file |
| && r != r->main && u->output.buf) |
| { |
| u->output.free = ngx_alloc_chain_link(r->pool); |
| if (u->output.free == NULL) { |
| return NGX_ERROR; |
| } |
| |
| u->output.free->buf = u->output.buf; |
| u->output.free->next = NULL; |
| |
| u->output.buf->pos = u->output.buf->start; |
| u->output.buf->last = u->output.buf->start; |
| } |
| |
| u->output.buf = NULL; |
| u->output.in = NULL; |
| u->output.busy = NULL; |
| |
| /* reinit u->buffer */ |
| |
| u->buffer.pos = u->buffer.start; |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (r->cache) { |
| u->buffer.pos += r->cache->header_start; |
| } |
| |
| #endif |
| |
| u->buffer.last = u->buffer.pos; |
| |
| return NGX_OK; |
| } |
| |
| |
| static void |
| ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u, |
| ngx_uint_t do_write) |
| { |
| ngx_int_t rc; |
| ngx_connection_t *c; |
| |
| c = u->peer.connection; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream send request"); |
| |
| if (u->state->connect_time == (ngx_msec_t) -1) { |
| u->state->connect_time = ngx_current_msec - u->state->response_time; |
| } |
| |
| if (!u->request_sent && ngx_http_upstream_test_connect(c) != NGX_OK) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| return; |
| } |
| |
| c->log->action = "sending request to upstream"; |
| |
| rc = ngx_http_upstream_send_request_body(r, u, do_write); |
| |
| if (rc == NGX_ERROR) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| return; |
| } |
| |
| if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { |
| ngx_http_upstream_finalize_request(r, u, rc); |
| return; |
| } |
| |
| if (rc == NGX_AGAIN) { |
| if (!c->write->ready || u->request_body_blocked) { |
| ngx_add_timer(c->write, u->conf->send_timeout); |
| |
| } else if (c->write->timer_set) { |
| ngx_del_timer(c->write); |
| } |
| |
| if (ngx_handle_write_event(c->write, u->conf->send_lowat) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| if (c->write->ready && c->tcp_nopush == NGX_TCP_NOPUSH_SET) { |
| if (ngx_tcp_push(c->fd) == -1) { |
| ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno, |
| ngx_tcp_push_n " failed"); |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| c->tcp_nopush = NGX_TCP_NOPUSH_UNSET; |
| } |
| |
| return; |
| } |
| |
| /* rc == NGX_OK */ |
| |
| if (c->write->timer_set) { |
| ngx_del_timer(c->write); |
| } |
| |
| if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) { |
| if (ngx_tcp_push(c->fd) == -1) { |
| ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno, |
| ngx_tcp_push_n " failed"); |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| c->tcp_nopush = NGX_TCP_NOPUSH_UNSET; |
| } |
| |
| if (!u->conf->preserve_output) { |
| u->write_event_handler = ngx_http_upstream_dummy_handler; |
| } |
| |
| if (ngx_handle_write_event(c->write, 0) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| if (!u->request_body_sent) { |
| u->request_body_sent = 1; |
| |
| if (u->header_sent) { |
| return; |
| } |
| |
| ngx_add_timer(c->read, u->conf->read_timeout); |
| |
| if (c->read->ready) { |
| ngx_http_upstream_process_header(r, u); |
| return; |
| } |
| } |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_send_request_body(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_uint_t do_write) |
| { |
| ngx_int_t rc; |
| ngx_chain_t *out, *cl, *ln; |
| ngx_connection_t *c; |
| ngx_http_core_loc_conf_t *clcf; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http upstream send request body"); |
| |
| if (!r->request_body_no_buffering) { |
| |
| /* buffered request body */ |
| |
| if (!u->request_sent) { |
| u->request_sent = 1; |
| out = u->request_bufs; |
| |
| } else { |
| out = NULL; |
| } |
| |
| rc = ngx_output_chain(&u->output, out); |
| |
| if (rc == NGX_AGAIN) { |
| u->request_body_blocked = 1; |
| |
| } else { |
| u->request_body_blocked = 0; |
| } |
| |
| return rc; |
| } |
| |
| if (!u->request_sent) { |
| u->request_sent = 1; |
| out = u->request_bufs; |
| |
| if (r->request_body->bufs) { |
| for (cl = out; cl->next; cl = out->next) { /* void */ } |
| cl->next = r->request_body->bufs; |
| r->request_body->bufs = NULL; |
| } |
| |
| c = u->peer.connection; |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| if (clcf->tcp_nodelay && ngx_tcp_nodelay(c) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| r->read_event_handler = ngx_http_upstream_read_request_handler; |
| |
| } else { |
| out = NULL; |
| } |
| |
| for ( ;; ) { |
| |
| if (do_write) { |
| rc = ngx_output_chain(&u->output, out); |
| |
| if (rc == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| while (out) { |
| ln = out; |
| out = out->next; |
| ngx_free_chain(r->pool, ln); |
| } |
| |
| if (rc == NGX_AGAIN) { |
| u->request_body_blocked = 1; |
| |
| } else { |
| u->request_body_blocked = 0; |
| } |
| |
| if (rc == NGX_OK && !r->reading_body) { |
| break; |
| } |
| } |
| |
| if (r->reading_body) { |
| /* read client request body */ |
| |
| rc = ngx_http_read_unbuffered_request_body(r); |
| |
| if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { |
| return rc; |
| } |
| |
| out = r->request_body->bufs; |
| r->request_body->bufs = NULL; |
| } |
| |
| /* stop if there is nothing to send */ |
| |
| if (out == NULL) { |
| rc = NGX_AGAIN; |
| break; |
| } |
| |
| do_write = 1; |
| } |
| |
| if (!r->reading_body) { |
| if (!u->store && !r->post_action && !u->conf->ignore_client_abort) { |
| r->read_event_handler = |
| ngx_http_upstream_rd_check_broken_connection; |
| } |
| } |
| |
| return rc; |
| } |
| |
| |
| static void |
| ngx_http_upstream_send_request_handler(ngx_http_request_t *r, |
| ngx_http_upstream_t *u) |
| { |
| ngx_connection_t *c; |
| |
| c = u->peer.connection; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http upstream send request handler"); |
| |
| if (c->write->timedout) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT); |
| return; |
| } |
| |
| #if (NGX_HTTP_SSL) |
| |
| if (u->ssl && c->ssl == NULL) { |
| ngx_http_upstream_ssl_init_connection(r, u, c); |
| return; |
| } |
| |
| #endif |
| |
| if (u->header_sent && !u->conf->preserve_output) { |
| u->write_event_handler = ngx_http_upstream_dummy_handler; |
| |
| (void) ngx_handle_write_event(c->write, 0); |
| |
| return; |
| } |
| |
| ngx_http_upstream_send_request(r, u, 1); |
| } |
| |
| |
| static void |
| ngx_http_upstream_read_request_handler(ngx_http_request_t *r) |
| { |
| ngx_connection_t *c; |
| ngx_http_upstream_t *u; |
| |
| c = r->connection; |
| u = r->upstream; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http upstream read request handler"); |
| |
| if (c->read->timedout) { |
| c->timedout = 1; |
| ngx_http_upstream_finalize_request(r, u, NGX_HTTP_REQUEST_TIME_OUT); |
| return; |
| } |
| |
| ngx_http_upstream_send_request(r, u, 0); |
| } |
| |
| |
| static void |
| ngx_http_upstream_process_header(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| ssize_t n; |
| ngx_int_t rc; |
| ngx_connection_t *c; |
| |
| c = u->peer.connection; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream process header"); |
| |
| c->log->action = "reading response header from upstream"; |
| |
| if (c->read->timedout) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT); |
| return; |
| } |
| |
| if (!u->request_sent && ngx_http_upstream_test_connect(c) != NGX_OK) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| return; |
| } |
| |
| if (u->buffer.start == NULL) { |
| u->buffer.start = ngx_palloc(r->pool, u->conf->buffer_size); |
| if (u->buffer.start == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| u->buffer.pos = u->buffer.start; |
| u->buffer.last = u->buffer.start; |
| u->buffer.end = u->buffer.start + u->conf->buffer_size; |
| u->buffer.temporary = 1; |
| |
| u->buffer.tag = u->output.tag; |
| |
| if (ngx_list_init(&u->headers_in.headers, r->pool, 8, |
| sizeof(ngx_table_elt_t)) |
| != NGX_OK) |
| { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| if (ngx_list_init(&u->headers_in.trailers, r->pool, 2, |
| sizeof(ngx_table_elt_t)) |
| != NGX_OK) |
| { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (r->cache) { |
| u->buffer.pos += r->cache->header_start; |
| u->buffer.last = u->buffer.pos; |
| } |
| #endif |
| } |
| |
| for ( ;; ) { |
| |
| n = c->recv(c, u->buffer.last, u->buffer.end - u->buffer.last); |
| |
| if (n == NGX_AGAIN) { |
| #if 0 |
| ngx_add_timer(rev, u->read_timeout); |
| #endif |
| |
| if (ngx_handle_read_event(c->read, 0) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| return; |
| } |
| |
| if (n == 0) { |
| ngx_log_error(NGX_LOG_ERR, c->log, 0, |
| "upstream prematurely closed connection"); |
| } |
| |
| if (n == NGX_ERROR || n == 0) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| return; |
| } |
| |
| u->state->bytes_received += n; |
| |
| u->buffer.last += n; |
| |
| #if 0 |
| u->valid_header_in = 0; |
| |
| u->peer.cached = 0; |
| #endif |
| |
| rc = u->process_header(r); |
| |
| if (rc == NGX_AGAIN) { |
| |
| if (u->buffer.last == u->buffer.end) { |
| ngx_log_error(NGX_LOG_ERR, c->log, 0, |
| "upstream sent too big header"); |
| |
| ngx_http_upstream_next(r, u, |
| NGX_HTTP_UPSTREAM_FT_INVALID_HEADER); |
| return; |
| } |
| |
| continue; |
| } |
| |
| break; |
| } |
| |
| if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER); |
| return; |
| } |
| |
| if (rc == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| /* rc == NGX_OK */ |
| |
| u->state->header_time = ngx_current_msec - u->state->response_time; |
| |
| if (u->headers_in.status_n >= NGX_HTTP_SPECIAL_RESPONSE) { |
| |
| if (ngx_http_upstream_test_next(r, u) == NGX_OK) { |
| return; |
| } |
| |
| if (ngx_http_upstream_intercept_errors(r, u) == NGX_OK) { |
| return; |
| } |
| } |
| |
| if (ngx_http_upstream_process_headers(r, u) != NGX_OK) { |
| return; |
| } |
| |
| ngx_http_upstream_send_response(r, u); |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_test_next(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| ngx_msec_t timeout; |
| ngx_uint_t status, mask; |
| ngx_http_upstream_next_t *un; |
| |
| status = u->headers_in.status_n; |
| |
| for (un = ngx_http_upstream_next_errors; un->status; un++) { |
| |
| if (status != un->status) { |
| continue; |
| } |
| |
| timeout = u->conf->next_upstream_timeout; |
| |
| if (u->request_sent |
| && (r->method & (NGX_HTTP_POST|NGX_HTTP_LOCK|NGX_HTTP_PATCH))) |
| { |
| mask = un->mask | NGX_HTTP_UPSTREAM_FT_NON_IDEMPOTENT; |
| |
| } else { |
| mask = un->mask; |
| } |
| |
| if (u->peer.tries > 1 |
| && ((u->conf->next_upstream & mask) == mask) |
| && !(u->request_sent && r->request_body_no_buffering) |
| && !(timeout && ngx_current_msec - u->peer.start_time >= timeout)) |
| { |
| ngx_http_upstream_next(r, u, un->mask); |
| return NGX_OK; |
| } |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (u->cache_status == NGX_HTTP_CACHE_EXPIRED |
| && ((u->conf->cache_use_stale & un->mask) || r->cache->stale_error)) |
| { |
| ngx_int_t rc; |
| |
| rc = u->reinit_request(r); |
| |
| if (rc != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, rc); |
| return NGX_OK; |
| } |
| |
| u->cache_status = NGX_HTTP_CACHE_STALE; |
| rc = ngx_http_upstream_cache_send(r, u); |
| |
| if (rc == NGX_DONE) { |
| return NGX_OK; |
| } |
| |
| if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) { |
| rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| ngx_http_upstream_finalize_request(r, u, rc); |
| return NGX_OK; |
| } |
| |
| #endif |
| } |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (status == NGX_HTTP_NOT_MODIFIED |
| && u->cache_status == NGX_HTTP_CACHE_EXPIRED |
| && u->conf->cache_revalidate) |
| { |
| time_t now, valid, updating, error; |
| ngx_int_t rc; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http upstream not modified"); |
| |
| now = ngx_time(); |
| |
| valid = r->cache->valid_sec; |
| updating = r->cache->updating_sec; |
| error = r->cache->error_sec; |
| |
| rc = u->reinit_request(r); |
| |
| if (rc != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, rc); |
| return NGX_OK; |
| } |
| |
| u->cache_status = NGX_HTTP_CACHE_REVALIDATED; |
| rc = ngx_http_upstream_cache_send(r, u); |
| |
| if (rc == NGX_DONE) { |
| return NGX_OK; |
| } |
| |
| if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) { |
| rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| if (valid == 0) { |
| valid = r->cache->valid_sec; |
| updating = r->cache->updating_sec; |
| error = r->cache->error_sec; |
| } |
| |
| if (valid == 0) { |
| valid = ngx_http_file_cache_valid(u->conf->cache_valid, |
| u->headers_in.status_n); |
| if (valid) { |
| valid = now + valid; |
| } |
| } |
| |
| if (valid) { |
| r->cache->valid_sec = valid; |
| r->cache->updating_sec = updating; |
| r->cache->error_sec = error; |
| |
| r->cache->date = now; |
| |
| ngx_http_file_cache_update_header(r); |
| } |
| |
| ngx_http_upstream_finalize_request(r, u, rc); |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| return NGX_DECLINED; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_intercept_errors(ngx_http_request_t *r, |
| ngx_http_upstream_t *u) |
| { |
| ngx_int_t status; |
| ngx_uint_t i; |
| ngx_table_elt_t *h; |
| ngx_http_err_page_t *err_page; |
| ngx_http_core_loc_conf_t *clcf; |
| |
| status = u->headers_in.status_n; |
| |
| if (status == NGX_HTTP_NOT_FOUND && u->conf->intercept_404) { |
| ngx_http_upstream_finalize_request(r, u, NGX_HTTP_NOT_FOUND); |
| return NGX_OK; |
| } |
| |
| if (!u->conf->intercept_errors) { |
| return NGX_DECLINED; |
| } |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| if (clcf->error_pages == NULL) { |
| return NGX_DECLINED; |
| } |
| |
| err_page = clcf->error_pages->elts; |
| for (i = 0; i < clcf->error_pages->nelts; i++) { |
| |
| if (err_page[i].status == status) { |
| |
| if (status == NGX_HTTP_UNAUTHORIZED |
| && u->headers_in.www_authenticate) |
| { |
| h = ngx_list_push(&r->headers_out.headers); |
| |
| if (h == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return NGX_OK; |
| } |
| |
| *h = *u->headers_in.www_authenticate; |
| |
| r->headers_out.www_authenticate = h; |
| } |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (r->cache) { |
| |
| if (u->cacheable) { |
| time_t valid; |
| |
| valid = r->cache->valid_sec; |
| |
| if (valid == 0) { |
| valid = ngx_http_file_cache_valid(u->conf->cache_valid, |
| status); |
| if (valid) { |
| r->cache->valid_sec = ngx_time() + valid; |
| } |
| } |
| |
| if (valid) { |
| r->cache->error = status; |
| } |
| } |
| |
| ngx_http_file_cache_free(r->cache, u->pipe->temp_file); |
| } |
| #endif |
| ngx_http_upstream_finalize_request(r, u, status); |
| |
| return NGX_OK; |
| } |
| } |
| |
| return NGX_DECLINED; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_test_connect(ngx_connection_t *c) |
| { |
| int err; |
| socklen_t len; |
| |
| #if (NGX_HAVE_KQUEUE) |
| |
| if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { |
| if (c->write->pending_eof || c->read->pending_eof) { |
| if (c->write->pending_eof) { |
| err = c->write->kq_errno; |
| |
| } else { |
| err = c->read->kq_errno; |
| } |
| |
| c->log->action = "connecting to upstream"; |
| (void) ngx_connection_error(c, err, |
| "kevent() reported that connect() failed"); |
| return NGX_ERROR; |
| } |
| |
| } else |
| #endif |
| { |
| err = 0; |
| len = sizeof(int); |
| |
| /* |
| * BSDs and Linux return 0 and set a pending error in err |
| * Solaris returns -1 and sets errno |
| */ |
| |
| if (getsockopt(c->fd, SOL_SOCKET, SO_ERROR, (void *) &err, &len) |
| == -1) |
| { |
| err = ngx_socket_errno; |
| } |
| |
| if (err) { |
| c->log->action = "connecting to upstream"; |
| (void) ngx_connection_error(c, err, "connect() failed"); |
| return NGX_ERROR; |
| } |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_process_headers(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| ngx_str_t uri, args; |
| ngx_uint_t i, flags; |
| ngx_list_part_t *part; |
| ngx_table_elt_t *h; |
| ngx_http_upstream_header_t *hh; |
| ngx_http_upstream_main_conf_t *umcf; |
| |
| umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module); |
| |
| if (u->headers_in.x_accel_redirect |
| && !(u->conf->ignore_headers & NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT)) |
| { |
| ngx_http_upstream_finalize_request(r, u, NGX_DECLINED); |
| |
| part = &u->headers_in.headers.part; |
| h = part->elts; |
| |
| for (i = 0; /* void */; i++) { |
| |
| if (i >= part->nelts) { |
| if (part->next == NULL) { |
| break; |
| } |
| |
| part = part->next; |
| h = part->elts; |
| i = 0; |
| } |
| |
| hh = ngx_hash_find(&umcf->headers_in_hash, h[i].hash, |
| h[i].lowcase_key, h[i].key.len); |
| |
| if (hh && hh->redirect) { |
| if (hh->copy_handler(r, &h[i], hh->conf) != NGX_OK) { |
| ngx_http_finalize_request(r, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return NGX_DONE; |
| } |
| } |
| } |
| |
| uri = u->headers_in.x_accel_redirect->value; |
| |
| if (uri.data[0] == '@') { |
| ngx_http_named_location(r, &uri); |
| |
| } else { |
| ngx_str_null(&args); |
| flags = NGX_HTTP_LOG_UNSAFE; |
| |
| if (ngx_http_parse_unsafe_uri(r, &uri, &args, &flags) != NGX_OK) { |
| ngx_http_finalize_request(r, NGX_HTTP_NOT_FOUND); |
| return NGX_DONE; |
| } |
| |
| if (r->method != NGX_HTTP_HEAD) { |
| r->method = NGX_HTTP_GET; |
| r->method_name = ngx_http_core_get_method; |
| } |
| |
| ngx_http_internal_redirect(r, &uri, &args); |
| } |
| |
| ngx_http_finalize_request(r, NGX_DONE); |
| return NGX_DONE; |
| } |
| |
| part = &u->headers_in.headers.part; |
| h = part->elts; |
| |
| for (i = 0; /* void */; i++) { |
| |
| if (i >= part->nelts) { |
| if (part->next == NULL) { |
| break; |
| } |
| |
| part = part->next; |
| h = part->elts; |
| i = 0; |
| } |
| |
| if (ngx_hash_find(&u->conf->hide_headers_hash, h[i].hash, |
| h[i].lowcase_key, h[i].key.len)) |
| { |
| continue; |
| } |
| |
| hh = ngx_hash_find(&umcf->headers_in_hash, h[i].hash, |
| h[i].lowcase_key, h[i].key.len); |
| |
| if (hh) { |
| if (hh->copy_handler(r, &h[i], hh->conf) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return NGX_DONE; |
| } |
| |
| continue; |
| } |
| |
| if (ngx_http_upstream_copy_header_line(r, &h[i], 0) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return NGX_DONE; |
| } |
| } |
| |
| if (r->headers_out.server && r->headers_out.server->value.data == NULL) { |
| r->headers_out.server->hash = 0; |
| } |
| |
| if (r->headers_out.date && r->headers_out.date->value.data == NULL) { |
| r->headers_out.date->hash = 0; |
| } |
| |
| r->headers_out.status = u->headers_in.status_n; |
| r->headers_out.status_line = u->headers_in.status_line; |
| |
| r->headers_out.content_length_n = u->headers_in.content_length_n; |
| |
| r->disable_not_modified = !u->cacheable; |
| |
| if (u->conf->force_ranges) { |
| r->allow_ranges = 1; |
| r->single_range = 1; |
| |
| #if (NGX_HTTP_CACHE) |
| if (r->cached) { |
| r->single_range = 0; |
| } |
| #endif |
| } |
| |
| u->length = -1; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_process_trailers(ngx_http_request_t *r, |
| ngx_http_upstream_t *u) |
| { |
| ngx_uint_t i; |
| ngx_list_part_t *part; |
| ngx_table_elt_t *h, *ho; |
| |
| if (!u->conf->pass_trailers) { |
| return NGX_OK; |
| } |
| |
| part = &u->headers_in.trailers.part; |
| h = part->elts; |
| |
| for (i = 0; /* void */; i++) { |
| |
| if (i >= part->nelts) { |
| if (part->next == NULL) { |
| break; |
| } |
| |
| part = part->next; |
| h = part->elts; |
| i = 0; |
| } |
| |
| if (ngx_hash_find(&u->conf->hide_headers_hash, h[i].hash, |
| h[i].lowcase_key, h[i].key.len)) |
| { |
| continue; |
| } |
| |
| ho = ngx_list_push(&r->headers_out.trailers); |
| if (ho == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ho = h[i]; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static void |
| ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| ssize_t n; |
| ngx_int_t rc; |
| ngx_event_pipe_t *p; |
| ngx_connection_t *c; |
| ngx_http_core_loc_conf_t *clcf; |
| |
| rc = ngx_http_send_header(r); |
| |
| if (rc == NGX_ERROR || rc > NGX_OK || r->post_action) { |
| ngx_http_upstream_finalize_request(r, u, rc); |
| return; |
| } |
| |
| u->header_sent = 1; |
| |
| if (u->upgrade) { |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (r->cache) { |
| ngx_http_file_cache_free(r->cache, u->pipe->temp_file); |
| } |
| |
| #endif |
| |
| ngx_http_upstream_upgrade(r, u); |
| return; |
| } |
| |
| c = r->connection; |
| |
| if (r->header_only) { |
| |
| if (!u->buffering) { |
| ngx_http_upstream_finalize_request(r, u, rc); |
| return; |
| } |
| |
| if (!u->cacheable && !u->store) { |
| ngx_http_upstream_finalize_request(r, u, rc); |
| return; |
| } |
| |
| u->pipe->downstream_error = 1; |
| } |
| |
| if (r->request_body && r->request_body->temp_file |
| && r == r->main && !r->preserve_body |
| && !u->conf->preserve_output) |
| { |
| ngx_pool_run_cleanup_file(r->pool, r->request_body->temp_file->file.fd); |
| r->request_body->temp_file->file.fd = NGX_INVALID_FILE; |
| } |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| if (!u->buffering) { |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (r->cache) { |
| ngx_http_file_cache_free(r->cache, u->pipe->temp_file); |
| } |
| |
| #endif |
| |
| if (u->input_filter == NULL) { |
| u->input_filter_init = ngx_http_upstream_non_buffered_filter_init; |
| u->input_filter = ngx_http_upstream_non_buffered_filter; |
| u->input_filter_ctx = r; |
| } |
| |
| u->read_event_handler = ngx_http_upstream_process_non_buffered_upstream; |
| r->write_event_handler = |
| ngx_http_upstream_process_non_buffered_downstream; |
| |
| r->limit_rate = 0; |
| |
| if (u->input_filter_init(u->input_filter_ctx) == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, NGX_ERROR); |
| return; |
| } |
| |
| if (clcf->tcp_nodelay && ngx_tcp_nodelay(c) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, NGX_ERROR); |
| return; |
| } |
| |
| n = u->buffer.last - u->buffer.pos; |
| |
| if (n) { |
| u->buffer.last = u->buffer.pos; |
| |
| u->state->response_length += n; |
| |
| if (u->input_filter(u->input_filter_ctx, n) == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, NGX_ERROR); |
| return; |
| } |
| |
| ngx_http_upstream_process_non_buffered_downstream(r); |
| |
| } else { |
| u->buffer.pos = u->buffer.start; |
| u->buffer.last = u->buffer.start; |
| |
| if (ngx_http_send_special(r, NGX_HTTP_FLUSH) == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, NGX_ERROR); |
| return; |
| } |
| |
| if (u->peer.connection->read->ready || u->length == 0) { |
| ngx_http_upstream_process_non_buffered_upstream(r, u); |
| } |
| } |
| |
| return; |
| } |
| |
| /* TODO: preallocate event_pipe bufs, look "Content-Length" */ |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (r->cache && r->cache->file.fd != NGX_INVALID_FILE) { |
| ngx_pool_run_cleanup_file(r->pool, r->cache->file.fd); |
| r->cache->file.fd = NGX_INVALID_FILE; |
| } |
| |
| switch (ngx_http_test_predicates(r, u->conf->no_cache)) { |
| |
| case NGX_ERROR: |
| ngx_http_upstream_finalize_request(r, u, NGX_ERROR); |
| return; |
| |
| case NGX_DECLINED: |
| u->cacheable = 0; |
| break; |
| |
| default: /* NGX_OK */ |
| |
| if (u->cache_status == NGX_HTTP_CACHE_BYPASS) { |
| |
| /* create cache if previously bypassed */ |
| |
| if (ngx_http_file_cache_create(r) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, NGX_ERROR); |
| return; |
| } |
| } |
| |
| break; |
| } |
| |
| if (u->cacheable) { |
| time_t now, valid; |
| |
| now = ngx_time(); |
| |
| valid = r->cache->valid_sec; |
| |
| if (valid == 0) { |
| valid = ngx_http_file_cache_valid(u->conf->cache_valid, |
| u->headers_in.status_n); |
| if (valid) { |
| r->cache->valid_sec = now + valid; |
| } |
| } |
| |
| if (valid) { |
| r->cache->date = now; |
| r->cache->body_start = (u_short) (u->buffer.pos - u->buffer.start); |
| |
| if (u->headers_in.status_n == NGX_HTTP_OK |
| || u->headers_in.status_n == NGX_HTTP_PARTIAL_CONTENT) |
| { |
| r->cache->last_modified = u->headers_in.last_modified_time; |
| |
| if (u->headers_in.etag) { |
| r->cache->etag = u->headers_in.etag->value; |
| |
| } else { |
| ngx_str_null(&r->cache->etag); |
| } |
| |
| } else { |
| r->cache->last_modified = -1; |
| ngx_str_null(&r->cache->etag); |
| } |
| |
| if (ngx_http_file_cache_set_header(r, u->buffer.start) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, NGX_ERROR); |
| return; |
| } |
| |
| } else { |
| u->cacheable = 0; |
| } |
| } |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http cacheable: %d", u->cacheable); |
| |
| if (u->cacheable == 0 |