| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| |
| |
| 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); |
| static void ngx_http_upstream_send_request_handler(ngx_event_t *wev); |
| static void ngx_http_upstream_process_header(ngx_event_t *rev); |
| static void ngx_http_upstream_send_response(ngx_http_request_t *r, |
| ngx_http_upstream_t *u); |
| static void |
| ngx_http_upstream_process_non_buffered_downstream(ngx_http_request_t *r); |
| static void ngx_http_upstream_process_non_buffered_body(ngx_event_t *ev); |
| 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); |
| static void ngx_http_upstream_process_downstream(ngx_http_request_t *r); |
| static void ngx_http_upstream_process_body(ngx_event_t *ev); |
| static void ngx_http_upstream_dummy_handler(ngx_event_t *wev); |
| 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_multi_header_lines(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_limit_rate(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_conditional_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_content_length(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); |
| #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 size_t ngx_http_upstream_log_status_getlen(ngx_http_request_t *r, |
| uintptr_t data); |
| static u_char *ngx_http_upstream_log_status(ngx_http_request_t *r, |
| u_char *buf, ngx_http_log_op_t *op); |
| static size_t ngx_http_upstream_log_response_time_getlen(ngx_http_request_t *r, |
| uintptr_t data); |
| static u_char *ngx_http_upstream_log_response_time(ngx_http_request_t *r, |
| u_char *buf, ngx_http_log_op_t *op); |
| |
| static u_char *ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf, |
| size_t len); |
| |
| static ngx_int_t ngx_http_upstream_add_variables(ngx_conf_t *cf); |
| 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 void *ngx_http_upstream_create_main_conf(ngx_conf_t *cf); |
| static char *ngx_http_core_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(ngx_connection_t *c); |
| static void ngx_http_upstream_ssl_shutdown(ngx_connection_t *c, |
| ngx_peer_t *peer); |
| #endif |
| |
| |
| 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), |
| /* STUB */ ngx_http_upstream_ignore_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, 0 }, |
| |
| { ngx_string("Content-Length"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, content_length), |
| ngx_http_upstream_copy_content_length, 0, 0 }, |
| |
| { ngx_string("Date"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, date), |
| ngx_http_upstream_conditional_copy_header_line, |
| offsetof(ngx_http_upstream_conf_t, pass_date), 0 }, |
| |
| { ngx_string("Server"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, server), |
| ngx_http_upstream_conditional_copy_header_line, |
| offsetof(ngx_http_upstream_conf_t, pass_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_ignore_header_line, 0, |
| 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_ignore_header_line, 0, |
| ngx_http_upstream_copy_header_line, 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_multi_header_lines, |
| offsetof(ngx_http_upstream_headers_in_t, cache_control), |
| ngx_http_upstream_copy_multi_header_lines, |
| offsetof(ngx_http_headers_out_t, cache_control), 1 }, |
| |
| { ngx_string("Expires"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, expires), |
| 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_header_line, |
| offsetof(ngx_http_headers_out_t, accept_ranges), 1 }, |
| |
| { ngx_string("Connection"), |
| ngx_http_upstream_ignore_header_line, 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("X-Pad"), |
| ngx_http_upstream_ignore_header_line, 0, |
| ngx_http_upstream_ignore_header_line, 0, 0 }, |
| |
| { ngx_string("X-Powered-By"), |
| ngx_http_upstream_ignore_header_line, 0, |
| ngx_http_upstream_conditional_copy_header_line, |
| offsetof(ngx_http_upstream_conf_t, pass_x_powered_by), 0 }, |
| |
| { ngx_string("X-Accel-Expires"), |
| ngx_http_upstream_process_header_line, |
| offsetof(ngx_http_upstream_headers_in_t, x_accel_expires), |
| ngx_http_upstream_conditional_copy_header_line, |
| offsetof(ngx_http_upstream_conf_t, pass_x_accel_expires), 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_ignore_header_line, 0, 0 }, |
| |
| { ngx_string("X-Accel-Limit-Rate"), |
| ngx_http_upstream_process_limit_rate, 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 } |
| }; |
| |
| |
| 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_core_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 */ |
| NULL, /* 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_log_op_name_t ngx_http_upstream_log_fmt_ops[] = { |
| { ngx_string("upstream_status"), 0, NULL, |
| ngx_http_upstream_log_status_getlen, |
| ngx_http_upstream_log_status }, |
| { ngx_string("upstream_response_time"), 0, NULL, |
| ngx_http_upstream_log_response_time_getlen, |
| ngx_http_upstream_log_response_time }, |
| { ngx_null_string, 0, NULL, NULL, NULL } |
| }; |
| |
| |
| static ngx_http_variable_t ngx_http_upstream_vars[] = { |
| |
| { ngx_string("upstream_status"), NULL, |
| ngx_http_upstream_status_variable, 0, NGX_HTTP_VAR_NOHASH, 0 }, |
| |
| { ngx_string("upstream_response_time"), NULL, |
| ngx_http_upstream_response_time_variable, 0, NGX_HTTP_VAR_NOHASH, 0 }, |
| |
| { ngx_null_string, NULL, NULL, 0, 0, 0 } |
| }; |
| |
| |
| void |
| ngx_http_upstream_init(ngx_http_request_t *r) |
| { |
| ngx_time_t *tp; |
| ngx_connection_t *c; |
| ngx_http_cleanup_t *cln; |
| ngx_http_upstream_t *u; |
| ngx_http_core_loc_conf_t *clcf; |
| |
| c = r->connection; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http init upstream, client timer: %d", c->read->timer_set); |
| |
| if (c->read->timer_set) { |
| ngx_del_timer(c->read); |
| } |
| |
| u = r->upstream; |
| |
| if (!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 (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; |
| } |
| } |
| } |
| |
| 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; |
| } |
| |
| u->peer.log = r->connection->log; |
| u->saved_log_handler = r->log_handler; |
| r->log_handler = ngx_http_upstream_log_error; |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| u->output.sendfile = r->connection->sendfile; |
| u->output.pool = r->pool; |
| u->output.bufs.num = 1; |
| u->output.bufs.size = clcf->client_body_buffer_size; |
| u->output.output_filter = ngx_chain_writer; |
| u->output.filter_ctx = &u->writer; |
| |
| u->writer.pool = r->pool; |
| |
| if (ngx_array_init(&u->states, r->pool, u->peer.peers->number, |
| sizeof(ngx_http_upstream_state_t)) |
| != NGX_OK) |
| { |
| ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| u->state = ngx_array_push(&u->states); |
| if (u->state == NULL) { |
| ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t)); |
| |
| tp = ngx_timeofday(); |
| |
| u->state->response_time = tp->sec * 1000 + tp->msec; |
| |
| 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; |
| |
| ngx_http_upstream_connect(r, u); |
| } |
| |
| |
| 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_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) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| return; |
| } |
| |
| if (u->peer.connection == NULL) { |
| return; |
| } |
| |
| #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->cachable && u->peer.connection) { |
| ngx_log_error(NGX_LOG_INFO, ev->log, ev->kq_errno, |
| "kevent() reported that client closed prematurely " |
| "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 closed " |
| "prematurely connection"); |
| |
| if (u->peer.connection == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| return; |
| } |
| |
| return; |
| } |
| |
| #endif |
| |
| n = recv(c->fd, buf, 1, MSG_PEEK); |
| |
| err = ngx_socket_errno; |
| |
| /* |
| * we do not need to disable the write event because |
| * that event has NGX_USE_CLEAR_EVENT type |
| */ |
| |
| if (ev->write && (n >= 0 || err == NGX_EAGAIN)) { |
| return; |
| } |
| |
| if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && ev->active) { |
| if (ngx_del_event(ev, NGX_READ_EVENT, 0) == NGX_ERROR) { |
| 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->cachable && u->peer.connection) { |
| ngx_log_error(NGX_LOG_INFO, ev->log, err, |
| "client closed prematurely 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 closed prematurely connection"); |
| |
| if (u->peer.connection == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| return; |
| } |
| } |
| |
| |
| 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"; |
| |
| r->connection->single_connection = 0; |
| |
| 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.peers->peer[u->peer.cur_peer].name; |
| |
| if (rc == NGX_BUSY) { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no live upstreams"); |
| } |
| |
| if (rc == NGX_BUSY || rc == NGX_DECLINED) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| return; |
| } |
| |
| /* rc == NGX_OK || rc == NGX_AGAIN */ |
| |
| c = u->peer.connection; |
| |
| c->data = r; |
| |
| c->write->handler = ngx_http_upstream_send_request_handler; |
| c->read->handler = ngx_http_upstream_process_header; |
| |
| c->sendfile = r->connection->sendfile; |
| |
| c->pool = r->pool; |
| c->read->log = c->write->log = c->log = r->connection->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->temp_file && r == r->main) { |
| |
| /* |
| * the r->request_body->buf can be reused for one request only, |
| * the subrequests should allocate their own temporay 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; |
| |
| if (rc == NGX_AGAIN) { |
| ngx_add_timer(c->write, u->conf->connect_timeout); |
| return; |
| } |
| |
| #if (NGX_HTTP_SSL) |
| |
| if (u->conf->ssl && c->ssl == NULL) { |
| ngx_http_upstream_ssl_init_connection(r, u, c); |
| return; |
| } |
| |
| #endif |
| |
| ngx_http_upstream_send_request(r, u); |
| } |
| |
| |
| #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_peer_t *peer; |
| |
| if (ngx_ssl_create_connection(u->conf->ssl, c, |
| NGX_SSL_BUFFER|NGX_SSL_CLIENT) |
| == NGX_ERROR) |
| { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| c->sendfile = 0; |
| u->output.sendfile = 0; |
| |
| peer = &u->peer.peers->peer[u->peer.cur_peer]; |
| |
| if (ngx_ssl_set_session(c, peer->ssl_session) != 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) { |
| c->ssl->handler = ngx_http_upstream_ssl_handshake; |
| return; |
| } |
| |
| ngx_http_upstream_ssl_handshake(c); |
| } |
| |
| |
| static void |
| ngx_http_upstream_ssl_handshake(ngx_connection_t *c) |
| { |
| ngx_http_request_t *r; |
| ngx_http_upstream_t *u; |
| |
| r = c->data; |
| u = r->upstream; |
| |
| if (c->ssl->handshaked) { |
| |
| c->write->handler = ngx_http_upstream_send_request_handler; |
| c->read->handler = ngx_http_upstream_process_header; |
| |
| ngx_http_upstream_send_request(r, u); |
| |
| return; |
| } |
| |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| |
| } |
| |
| #endif |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_reinit(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| ngx_chain_t *cl; |
| |
| if (u->reinit_request(r) != NGX_OK) { |
| return NGX_ERROR; |
| } |
| |
| ngx_memzero(&r->upstream->headers_in, |
| sizeof(ngx_http_upstream_headers_in_t)); |
| |
| if (ngx_list_init(&r->upstream->headers_in.headers, r->pool, 8, |
| sizeof(ngx_table_elt_t)) |
| != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| |
| /* reinit the request chain */ |
| |
| for (cl = u->request_bufs; cl; cl = cl->next) { |
| cl->buf->pos = cl->buf->start; |
| cl->buf->file_pos = 0; |
| } |
| |
| /* 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 */ |
| |
| #if 0 |
| if (u->cache) { |
| u->buffer.pos = u->buffer.start + u->cache->ctx.header_size; |
| u->buffer.last = u->buffer.pos; |
| |
| } else { |
| u->buffer.pos = u->buffer.start; |
| u->buffer.last = u->buffer.start; |
| } |
| #else |
| |
| u->buffer.pos = u->buffer.start; |
| u->buffer.last = u->buffer.start; |
| |
| #endif |
| |
| /* add one more state */ |
| |
| u->state = ngx_array_push(&u->states); |
| if (u->state == NULL) { |
| return NGX_ERROR; |
| } |
| |
| ngx_memzero(u->state, sizeof(ngx_http_upstream_state_t)); |
| |
| return NGX_OK; |
| } |
| |
| |
| static void |
| ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| int rc; |
| ngx_connection_t *c; |
| |
| c = u->peer.connection; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream send request"); |
| |
| #if (NGX_HAVE_KQUEUE) |
| |
| if ((ngx_event_flags & NGX_USE_KQUEUE_EVENT) |
| && !u->request_sent |
| && c->write->pending_eof) |
| { |
| (void) ngx_connection_error(c, c->write->kq_errno, |
| "kevent() reported that connect() failed"); |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| return; |
| } |
| |
| #endif |
| |
| c->log->action = "sending request to upstream"; |
| |
| rc = ngx_output_chain(&u->output, u->request_sent ? NULL : u->request_bufs); |
| |
| u->request_sent = 1; |
| |
| if (rc == NGX_ERROR) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_ERROR); |
| return; |
| } |
| |
| if (c->write->timer_set) { |
| ngx_del_timer(c->write); |
| } |
| |
| if (rc == NGX_AGAIN) { |
| ngx_add_timer(c->write, u->conf->send_timeout); |
| |
| if (ngx_handle_write_event(c->write, u->conf->send_lowat) == NGX_ERROR) |
| { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| return; |
| } |
| |
| /* rc == NGX_OK */ |
| |
| if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) { |
| if (ngx_tcp_push(c->fd) == NGX_ERROR) { |
| 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; |
| } |
| |
| ngx_add_timer(c->read, u->conf->read_timeout); |
| |
| #if 1 |
| if (c->read->ready) { |
| |
| /* post aio operation */ |
| |
| /* |
| * TODO comment |
| * although we can post aio operation just in the end |
| * of ngx_http_upstream_connect() CHECK IT !!! |
| * it's better to do here because we postpone header buffer allocation |
| */ |
| |
| ngx_http_upstream_process_header(c->read); |
| return; |
| } |
| #endif |
| |
| c->write->handler = ngx_http_upstream_dummy_handler; |
| |
| if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| } |
| |
| |
| static void |
| ngx_http_upstream_send_request_handler(ngx_event_t *wev) |
| { |
| ngx_connection_t *c; |
| ngx_http_request_t *r; |
| ngx_http_upstream_t *u; |
| |
| c = wev->data; |
| r = c->data; |
| u = r->upstream; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, |
| "http upstream send request handler"); |
| |
| if (wev->timedout) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT); |
| return; |
| } |
| |
| #if (NGX_HTTP_SSL) |
| |
| if (u->conf->ssl && c->ssl == NULL) { |
| ngx_http_upstream_ssl_init_connection(r, u, c); |
| return; |
| } |
| |
| #endif |
| |
| ngx_http_upstream_send_request(r, u); |
| } |
| |
| |
| static void |
| ngx_http_upstream_process_header(ngx_event_t *rev) |
| { |
| ssize_t n; |
| ngx_int_t rc; |
| ngx_str_t *uri, args; |
| ngx_uint_t i, key, flags; |
| ngx_list_part_t *part; |
| ngx_table_elt_t *h; |
| ngx_connection_t *c; |
| ngx_http_request_t *r; |
| ngx_http_upstream_t *u; |
| ngx_http_err_page_t *err_page; |
| ngx_http_core_loc_conf_t *clcf; |
| ngx_http_upstream_header_t *hh; |
| ngx_http_upstream_main_conf_t *umcf; |
| |
| c = rev->data; |
| r = c->data; |
| u = r->upstream; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, |
| "http upstream process header"); |
| |
| c->log->action = "reading response header from upstream"; |
| |
| if (rev->timedout) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_TIMEOUT); |
| 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(&r->upstream->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 0 |
| if (u->cache) { |
| u->buffer.pos += u->cache->ctx.header_size; |
| u->buffer.last = u->buffer.pos; |
| } |
| #endif |
| } |
| |
| n = u->peer.connection->recv(u->peer.connection, 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(rev, 0) == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| return; |
| } |
| |
| if (n == 0) { |
| ngx_log_error(NGX_LOG_ERR, rev->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->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 0 |
| ngx_add_timer(rev, u->read_timeout); |
| #endif |
| |
| if (u->buffer.pos == u->buffer.end) { |
| ngx_log_error(NGX_LOG_ERR, rev->log, 0, |
| "upstream sent too big header"); |
| |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER); |
| return; |
| } |
| |
| if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| return; |
| } |
| |
| if (rc == NGX_HTTP_UPSTREAM_INVALID_HEADER) { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_INVALID_HEADER); |
| return; |
| } |
| |
| if (rc == NGX_ERROR || rc == NGX_HTTP_INTERNAL_SERVER_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| /* rc == NGX_OK */ |
| |
| if (u->headers_in.status_n == NGX_HTTP_INTERNAL_SERVER_ERROR) { |
| |
| if (u->peer.tries > 1 |
| && (u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_500)) |
| { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_500); |
| return; |
| } |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (u->peer.tries == 0 |
| && u->stale |
| && (u->conf->use_stale & NGX_HTTP_UPSTREAM_FT_HTTP_500)) |
| { |
| ngx_http_upstream_finalize_request(r, u, |
| ngx_http_send_cached_response(r)); |
| return; |
| } |
| |
| #endif |
| } |
| |
| if (u->headers_in.status_n == NGX_HTTP_NOT_FOUND) { |
| |
| if (u->peer.tries > 1 |
| && u->conf->next_upstream & NGX_HTTP_UPSTREAM_FT_HTTP_404) |
| { |
| ngx_http_upstream_next(r, u, NGX_HTTP_UPSTREAM_FT_HTTP_404); |
| return; |
| } |
| |
| if (u->conf->redirect_404) { |
| rc = (r->err_ctx == NULL) ? 404 : 204; |
| ngx_http_upstream_finalize_request(r, u, rc); |
| return; |
| } |
| } |
| |
| |
| if (u->headers_in.status_n >= NGX_HTTP_BAD_REQUEST |
| && u->conf->redirect_errors |
| && r->err_ctx == NULL) |
| { |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| if (clcf->error_pages) { |
| |
| err_page = clcf->error_pages->elts; |
| for (i = 0; i < clcf->error_pages->nelts; i++) { |
| if (err_page[i].status == (ngx_int_t) u->headers_in.status_n) { |
| |
| if (u->headers_in.status_n == NGX_HTTP_UNAUTHORIZED) { |
| |
| r->headers_out.www_authenticate = |
| ngx_list_push(&r->headers_out.headers); |
| |
| if (r->headers_out.www_authenticate == NULL) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| *r->headers_out.www_authenticate = |
| *u->headers_in.www_authenticate; |
| } |
| |
| ngx_http_upstream_finalize_request(r, u, |
| u->headers_in.status_n); |
| return; |
| } |
| } |
| } |
| } |
| |
| if (r->upstream->headers_in.x_accel_redirect) { |
| ngx_http_upstream_finalize_request(r, u, NGX_DECLINED); |
| |
| umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module); |
| hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets; |
| |
| part = &r->upstream->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; |
| } |
| |
| key = h[i].hash % umcf->headers_in_hash.hash_size; |
| |
| if (hh[key].redirect |
| && hh[key].name.len == h[i].key.len |
| && ngx_strcasecmp(hh[key].name.data, h[i].key.data) == 0) |
| { |
| if (hh[key].copy_handler(r, &h[i], hh[key].conf) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| } |
| } |
| |
| uri = &r->upstream->headers_in.x_accel_redirect->value; |
| args.len = 0; |
| args.data = NULL; |
| flags = 0; |
| |
| if (ngx_http_parse_unsafe_uri(r, uri, &args, &flags) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, NGX_HTTP_NOT_FOUND); |
| return; |
| } |
| |
| if (flags & NGX_HTTP_ZERO_IN_URI) { |
| r->zero_in_uri = 1; |
| } |
| |
| ngx_http_internal_redirect(r, uri, &args); |
| return; |
| } |
| |
| ngx_http_upstream_send_response(r, u); |
| } |
| |
| |
| static void |
| ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u) |
| { |
| int tcp_nodelay; |
| ssize_t size; |
| ngx_int_t rc; |
| ngx_uint_t i, key; |
| ngx_list_part_t *part; |
| ngx_table_elt_t *h; |
| ngx_event_pipe_t *p; |
| ngx_connection_t *c; |
| ngx_pool_cleanup_t *cl; |
| ngx_pool_cleanup_file_t *clf; |
| ngx_http_core_loc_conf_t *clcf; |
| 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); |
| hh = (ngx_http_upstream_header_t *) umcf->headers_in_hash.buckets; |
| |
| part = &r->upstream->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; |
| } |
| |
| key = h[i].hash % umcf->headers_in_hash.hash_size; |
| |
| if (hh[key].name.len == h[i].key.len |
| && ngx_strcasecmp(hh[key].name.data, h[i].key.data) == 0) |
| { |
| if (hh[key].copy_handler(r, &h[i], hh[key].conf) != NGX_OK) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| |
| 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; |
| } |
| } |
| |
| r->headers_out.status = u->headers_in.status_n; |
| r->headers_out.status_line = u->headers_in.status_line; |
| |
| if (r->headers_out.content_length_n != -1) { |
| u->length = (size_t) r->headers_out.content_length_n; |
| |
| } else { |
| u->length = NGX_MAX_SIZE_T_VALUE; |
| } |
| |
| 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 (r->request_body && r->request_body->temp_file) { |
| for (cl = r->pool->cleanup; cl; cl = cl->next) { |
| if (cl->handler == ngx_pool_cleanup_file) { |
| clf = cl->data; |
| |
| if (clf->fd == r->request_body->temp_file->file.fd) { |
| cl->handler(clf); |
| cl->handler = NULL; |
| break; |
| } |
| } |
| } |
| } |
| |
| c = r->connection; |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| if (u->pipe == NULL) { |
| |
| 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->peer.connection->read->handler = |
| ngx_http_upstream_process_non_buffered_body; |
| 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, 0); |
| return; |
| } |
| |
| if (clcf->tcp_nodelay && c->tcp_nodelay == NGX_TCP_NODELAY_UNSET) { |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "tcp_nodelay"); |
| |
| tcp_nodelay = 1; |
| |
| if (setsockopt(c->fd, IPPROTO_TCP, TCP_NODELAY, |
| (const void *) &tcp_nodelay, sizeof(int)) == -1) |
| { |
| ngx_connection_error(c, ngx_socket_errno, |
| "setsockopt(TCP_NODELAY) failed"); |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| |
| c->tcp_nodelay = NGX_TCP_NODELAY_SET; |
| } |
| |
| size = u->buffer.last - u->buffer.pos; |
| |
| if (size) { |
| u->buffer.last = u->buffer.pos; |
| |
| if (u->input_filter(u->input_filter_ctx, size) == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| |
| ngx_http_upstream_process_non_buffered_body(c->write); |
| |
| } 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, 0); |
| return; |
| } |
| } |
| |
| return; |
| } |
| |
| /* TODO: preallocate event_pipe bufs, look "Content-Length" */ |
| |
| #if 0 |
| |
| if (u->cache && u->cache->ctx.file.fd != NGX_INVALID_FILE) { |
| if (ngx_close_file(u->cache->ctx.file.fd) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, |
| ngx_close_file_n " \"%s\" failed", |
| u->cache->ctx.file.name.data); |
| } |
| } |
| |
| if (u->cachable) { |
| header = (ngx_http_cache_header_t *) u->buffer->start; |
| |
| header->expires = u->cache->ctx.expires; |
| header->last_modified = u->cache->ctx.last_modified; |
| header->date = u->cache->ctx.date; |
| header->length = r->headers_out.content_length_n; |
| u->cache->ctx.length = r->headers_out.content_length_n; |
| |
| header->key_len = u->cache->ctx.key0.len; |
| ngx_memcpy(&header->key, u->cache->ctx.key0.data, header->key_len); |
| header->key[header->key_len] = LF; |
| } |
| |
| #endif |
| |
| p = u->pipe; |
| |
| p->output_filter = (ngx_event_pipe_output_filter_pt) ngx_http_output_filter; |
| p->output_ctx = r; |
| p->tag = u->output.tag; |
| p->bufs = u->conf->bufs; |
| p->busy_size = u->conf->busy_buffers_size; |
| p->upstream = u->peer.connection; |
| p->downstream = c; |
| p->pool = r->pool; |
| p->log = c->log; |
| |
| p->cachable = u->cachable; |
| |
| p->temp_file = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t)); |
| if (p->temp_file == NULL) { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| |
| p->temp_file->file.fd = NGX_INVALID_FILE; |
| p->temp_file->file.log = c->log; |
| p->temp_file->path = u->conf->temp_path; |
| p->temp_file->pool = r->pool; |
| |
| if (u->cachable) { |
| p->temp_file->persistent = 1; |
| } else { |
| p->temp_file->warn = "an upstream response is buffered " |
| "to a temporary file"; |
| } |
| |
| p->max_temp_file_size = u->conf->max_temp_file_size; |
| p->temp_file_write_size = u->conf->temp_file_write_size; |
| |
| p->preread_bufs = ngx_alloc_chain_link(r->pool); |
| if (p->preread_bufs == NULL) { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| p->preread_bufs->buf = &u->buffer; |
| p->preread_bufs->next = NULL; |
| u->buffer.recycled = 1; |
| |
| p->preread_size = u->buffer.last - u->buffer.pos; |
| |
| if (u->cachable) { |
| p->buf_to_file = ngx_calloc_buf(r->pool); |
| if (p->buf_to_file == NULL) { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| p->buf_to_file->pos = u->buffer.start; |
| p->buf_to_file->last = u->buffer.pos; |
| p->buf_to_file->temporary = 1; |
| } |
| |
| if (ngx_event_flags & NGX_USE_AIO_EVENT) { |
| /* the posted aio operation may currupt a shadow buffer */ |
| p->single_buf = 1; |
| } |
| |
| /* TODO: p->free_bufs = 0 if use ngx_create_chain_of_bufs() */ |
| p->free_bufs = 1; |
| |
| /* |
| * event_pipe would do u->buffer.last += p->preread_size |
| * as though these bytes were read |
| */ |
| u->buffer.last = u->buffer.pos; |
| |
| if (u->conf->cyclic_temp_file) { |
| |
| /* |
| * we need to disable the use of sendfile() if we use cyclic temp file |
| * because the writing a new data may interfere with sendfile() |
| * that uses the same kernel file pages (at least on FreeBSD) |
| */ |
| |
| p->cyclic_temp_file = 1; |
| c->sendfile = 0; |
| |
| } else { |
| p->cyclic_temp_file = 0; |
| } |
| |
| p->read_timeout = u->conf->read_timeout; |
| p->send_timeout = clcf->send_timeout; |
| p->send_lowat = clcf->send_lowat; |
| |
| u->peer.connection->read->handler = ngx_http_upstream_process_body; |
| r->write_event_handler = ngx_http_upstream_process_downstream; |
| |
| ngx_http_upstream_process_body(u->peer.connection->read); |
| } |
| |
| |
| static void |
| ngx_http_upstream_process_non_buffered_downstream(ngx_http_request_t *r) |
| { |
| ngx_http_upstream_process_non_buffered_body(r->connection->write); |
| } |
| |
| |
| static void |
| ngx_http_upstream_process_non_buffered_body(ngx_event_t *ev) |
| { |
| size_t size; |
| ssize_t n; |
| ngx_buf_t *b; |
| ngx_int_t rc; |
| ngx_uint_t do_write; |
| ngx_connection_t *c, *client; |
| ngx_http_request_t *r; |
| ngx_http_upstream_t *u; |
| ngx_http_core_loc_conf_t *clcf; |
| |
| c = ev->data; |
| |
| if (ev->write) { |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream process non buffered downstream"); |
| c->log->action = "sending to client"; |
| |
| } else { |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream process non buffered upstream"); |
| c->log->action = "reading upstream"; |
| } |
| |
| if (ev->timedout) { |
| if (ev->write) { |
| c->timedout = 1; |
| ngx_connection_error(c, NGX_ETIMEDOUT, "client timed out"); |
| |
| } else { |
| ngx_connection_error(c, NGX_ETIMEDOUT, "upstream timed out"); |
| } |
| } |
| |
| r = c->data; |
| u = r->upstream; |
| client = r->connection; |
| |
| b = &u->buffer; |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| do_write = ev->write; |
| |
| for ( ;; ) { |
| |
| if (do_write) { |
| |
| if (u->out_bufs || u->busy_bufs) { |
| rc = ngx_http_output_filter(r, u->out_bufs); |
| |
| if (client->destroyed) { |
| return; |
| } |
| |
| if (rc == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| |
| ngx_chain_update_chains(&u->free_bufs, &u->busy_bufs, |
| &u->out_bufs, u->output.tag); |
| } |
| |
| if (u->busy_bufs == NULL) { |
| |
| if (u->length == 0 |
| || u->peer.connection->read->eof |
| || u->peer.connection->read->error) |
| { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| |
| b->pos = b->start; |
| b->last = b->start; |
| } |
| } |
| |
| size = b->end - b->last; |
| |
| if (size > u->length) { |
| size = u->length; |
| } |
| |
| if (size && u->peer.connection->read->ready) { |
| n = u->peer.connection->recv(u->peer.connection, b->last, size); |
| |
| if (n == NGX_AGAIN) { |
| break; |
| } |
| |
| if (n > 0) { |
| if (u->input_filter(u->input_filter_ctx, n) == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| } |
| |
| do_write = 1; |
| |
| continue; |
| } |
| |
| break; |
| } |
| |
| if (client->data == r) { |
| if (ngx_handle_write_event(client->write, clcf->send_lowat) |
| == NGX_ERROR) |
| { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| } |
| |
| if (client->write->active) { |
| ngx_add_timer(client->write, clcf->send_timeout); |
| |
| } else if (client->write->timer_set) { |
| ngx_del_timer(client->write); |
| } |
| |
| if (ngx_handle_read_event(u->peer.connection->read, 0) == NGX_ERROR) { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| |
| if (u->peer.connection->read->active) { |
| ngx_add_timer(u->peer.connection->read, u->conf->read_timeout); |
| |
| } else if (u->peer.connection->read->timer_set) { |
| ngx_del_timer(u->peer.connection->read); |
| } |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_non_buffered_filter_init(void *data) |
| { |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_non_buffered_filter(void *data, ssize_t bytes) |
| { |
| ngx_http_request_t *r = data; |
| |
| ngx_buf_t *b; |
| ngx_chain_t *cl, **ll; |
| ngx_http_upstream_t *u; |
| |
| u = r->upstream; |
| |
| for (cl = u->out_bufs, ll = &u->out_bufs; cl; cl = cl->next) { |
| ll = &cl->next; |
| } |
| |
| cl = ngx_chain_get_free_buf(r->pool, &u->free_bufs); |
| if (cl == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ll = cl; |
| |
| cl->buf->flush = 1; |
| cl->buf->memory = 1; |
| |
| b = &u->buffer; |
| |
| cl->buf->pos = b->last; |
| b->last += bytes; |
| cl->buf->last = b->last; |
| |
| if (u->length == NGX_MAX_SIZE_T_VALUE) { |
| return NGX_OK; |
| } |
| |
| u->length -= bytes; |
| |
| return NGX_OK; |
| } |
| |
| |
| static void |
| ngx_http_upstream_process_downstream(ngx_http_request_t *r) |
| { |
| ngx_http_upstream_process_body(r->connection->write); |
| } |
| |
| |
| static void |
| ngx_http_upstream_process_body(ngx_event_t *ev) |
| { |
| ngx_event_pipe_t *p; |
| ngx_connection_t *c, *downstream; |
| ngx_http_request_t *r; |
| ngx_http_upstream_t *u; |
| |
| c = ev->data; |
| r = c->data; |
| u = r->upstream; |
| downstream = r->connection; |
| |
| if (ev->write) { |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream process downstream"); |
| c->log->action = "sending to client"; |
| |
| } else { |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream process upstream"); |
| c->log->action = "reading upstream"; |
| } |
| |
| p = u->pipe; |
| |
| if (ev->timedout) { |
| if (ev->write) { |
| if (ev->delayed) { |
| |
| ev->timedout = 0; |
| ev->delayed = 0; |
| |
| if (!ev->ready) { |
| ngx_add_timer(ev, p->send_timeout); |
| |
| if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR) |
| { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| |
| return; |
| } |
| |
| if (ngx_event_pipe(p, ev->write) == NGX_ABORT) { |
| |
| if (downstream->destroyed) { |
| return; |
| } |
| |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| |
| } else { |
| p->downstream_error = 1; |
| c->timedout = 1; |
| ngx_connection_error(c, NGX_ETIMEDOUT, "client timed out"); |
| } |
| |
| } else { |
| p->upstream_error = 1; |
| ngx_connection_error(c, NGX_ETIMEDOUT, "upstream timed out"); |
| } |
| |
| } else { |
| if (ev->write && ev->delayed) { |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http downstream delayed"); |
| |
| if (ngx_handle_write_event(ev, p->send_lowat) == NGX_ERROR) { |
| return; |
| } |
| |
| return; |
| } |
| |
| if (ngx_event_pipe(p, ev->write) == NGX_ABORT) { |
| |
| if (downstream->destroyed) { |
| return; |
| } |
| |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| } |
| |
| if (u->peer.connection) { |
| |
| #if (NGX_HTTP_FILE_CACHE) |
| |
| if (p->upstream_done && u->cachable) { |
| if (ngx_http_cache_update(r) == NGX_ERROR) { |
| ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock); |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| |
| } else if (p->upstream_eof && u->cachable) { |
| |
| /* TODO: check length & update cache */ |
| |
| if (ngx_http_cache_update(r) == NGX_ERROR) { |
| ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock); |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| } |
| |
| #endif |
| |
| if (p->upstream_done || p->upstream_eof || p->upstream_error) { |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream exit: %p", p->out); |
| #if 0 |
| ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock); |
| #endif |
| ngx_http_upstream_finalize_request(r, u, 0); |
| return; |
| } |
| } |
| |
| if (p->downstream_error) { |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, |
| "http upstream downstream error"); |
| |
| if (!u->cachable && u->peer.connection) { |
| ngx_http_upstream_finalize_request(r, u, 0); |
| } |
| } |
| } |
| |
| |
| static void |
| ngx_http_upstream_dummy_handler(ngx_event_t *wev) |
| { |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, |
| "http upstream dummy handler"); |
| } |
| |
| |
| static void |
| ngx_http_upstream_next(ngx_http_request_t *r, ngx_http_upstream_t *u, |
| ngx_uint_t ft_type) |
| { |
| ngx_uint_t status, down; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http next upstream, %xD", ft_type); |
| |
| #if 0 |
| ngx_http_busy_unlock(u->conf->busy_lock, &u->busy_lock); |
| #endif |
| |
| if (ft_type == NGX_HTTP_UPSTREAM_FT_HTTP_404) { |
| down = 0; |
| } else { |
| down = 1; |
| } |
| |
| ngx_event_connect_peer_failed(&u->peer, down); |
| |
| if (ft_type == NGX_HTTP_UPSTREAM_FT_TIMEOUT) { |
| ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_ETIMEDOUT, |
| "upstream timed out"); |
| } |
| |
| if (u->peer.cached && ft_type == NGX_HTTP_UPSTREAM_FT_ERROR) { |
| status = 0; |
| |
| } else { |
| switch(ft_type) { |
| |
| case NGX_HTTP_UPSTREAM_FT_TIMEOUT: |
| status = NGX_HTTP_GATEWAY_TIME_OUT; |
| break; |
| |
| case NGX_HTTP_UPSTREAM_FT_HTTP_500: |
| status = NGX_HTTP_INTERNAL_SERVER_ERROR; |
| break; |
| |
| case NGX_HTTP_UPSTREAM_FT_HTTP_404: |
| status = NGX_HTTP_NOT_FOUND; |
| break; |
| |
| /* |
| * NGX_HTTP_UPSTREAM_FT_BUSY_LOCK and NGX_HTTP_UPSTREAM_FT_MAX_WAITING |
| * never reach here |
| */ |
| |
| default: |
| status = NGX_HTTP_BAD_GATEWAY; |
| } |
| } |
| |
| if (r->connection->error) { |
| ngx_http_upstream_finalize_request(r, u, |
| NGX_HTTP_CLIENT_CLOSED_REQUEST); |
| return; |
| } |
| |
| if (status) { |
| u->state->status = status; |
| |
| if (u->peer.tries == 0 || !(u->conf->next_upstream & ft_type)) { |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (u->stale && (u->conf->use_stale & ft_type)) { |
| ngx_http_upstream_finalize_request(r, u, |
| ngx_http_send_cached_response(r)); |
| return; |
| } |
| |
| #endif |
| |
| ngx_http_upstream_finalize_request(r, u, status); |
| return; |
| } |
| } |
| |
| if (u->peer.connection) { |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "close http upstream connection: %d", |
| u->peer.connection->fd); |
| #if (NGX_HTTP_SSL) |
| if (u->peer.connection->ssl) { |
| ngx_http_upstream_ssl_shutdown(u->peer.connection, |
| &u->peer.peers->peer[u->peer.cur_peer]); |
| } |
| #endif |
| ngx_close_connection(u->peer.connection); |
| } |
| |
| #if 0 |
| if (u->conf->busy_lock && !u->busy_locked) { |
| ngx_http_upstream_busy_lock(p); |
| return; |
| } |
| #endif |
| |
| ngx_http_upstream_connect(r, u); |
| } |
| |
| |
| static void |
| ngx_http_upstream_cleanup(void *data) |
| { |
| ngx_http_request_t *r = data; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "cleanup http upstream request: \"%V\"", &r->uri); |
| |
| ngx_http_upstream_finalize_request(r, r->upstream, NGX_DONE); |
| } |
| |
| |
| static void |
| ngx_http_upstream_finalize_request(ngx_http_request_t *r, |
| ngx_http_upstream_t *u, ngx_int_t rc) |
| { |
| ngx_time_t *tp; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "finalize http upstream request: %i", rc); |
| |
| *u->cleanup = NULL; |
| |
| if (u->state->response_time) { |
| tp = ngx_timeofday(); |
| u->state->response_time = tp->sec * 1000 + tp->msec |
| - u->state->response_time; |
| } |
| |
| u->finalize_request(r, rc); |
| |
| if (u->peer.connection) { |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "close http upstream connection: %d", |
| u->peer.connection->fd); |
| #if (NGX_HTTP_SSL) |
| |
| /* TODO: do not shutdown persistent connection */ |
| |
| if (u->peer.connection->ssl) { |
| ngx_http_upstream_ssl_shutdown(u->peer.connection, |
| &u->peer.peers->peer[u->peer.cur_peer]); |
| } |
| #endif |
| ngx_close_connection(u->peer.connection); |
| } |
| |
| u->peer.connection = NULL; |
| |
| if (u->header_sent && (rc == NGX_ERROR || rc >= NGX_HTTP_SPECIAL_RESPONSE)) |
| { |
| rc = 0; |
| } |
| |
| if (u->pipe && u->pipe->temp_file) { |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http upstream temp fd: %d", |
| u->pipe->temp_file->file.fd); |
| } |
| |
| #if 0 |
| if (u->cache) { |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "http upstream cache fd: %d", |
| u->cache->ctx.file.fd); |
| } |
| #endif |
| |
| r->log_handler = u->saved_log_handler; |
| |
| if (rc == NGX_DECLINED) { |
| return; |
| } |
| |
| r->connection->log->action = "sending to client"; |
| |
| if (rc == 0 && r == r->main && !r->post_action) { |
| rc = ngx_http_send_special(r, NGX_HTTP_LAST); |
| } |
| |
| ngx_http_finalize_request(r, rc); |
| } |
| |
| |
| #if (NGX_HTTP_SSL) |
| |
| static void |
| ngx_http_upstream_ssl_shutdown(ngx_connection_t *c, ngx_peer_t *peer) |
| { |
| /* lock peer mutex */ |
| |
| if (peer->ssl_session) { |
| ngx_ssl_free_session(peer->ssl_session); |
| } |
| |
| peer->ssl_session = ngx_ssl_get_session(c); |
| |
| /* unlock peer mutex */ |
| |
| /* |
| * We send the "close notify" shutdown alert to the upstream only |
| * and do not wait its "close notify" shutdown alert. |
| * It is acceptable according to the TLS standard. |
| */ |
| |
| c->ssl->no_wait_shutdown = 1; |
| |
| (void) ngx_ssl_shutdown(c); |
| } |
| |
| #endif |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_process_header_line(ngx_http_request_t *r, ngx_table_elt_t *h, |
| ngx_uint_t offset) |
| { |
| ngx_table_elt_t **ph; |
| |
| ph = (ngx_table_elt_t **) ((char *) &r->upstream->headers_in + offset); |
| |
| if (*ph == NULL) { |
| *ph = h; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset) |
| { |
| ngx_array_t *pa; |
| ngx_table_elt_t **ph; |
| |
| pa = (ngx_array_t *) ((char *) &r->upstream->headers_in + offset); |
| |
| if (pa->elts == NULL) { |
| if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| } |
| |
| ph = ngx_array_push(pa); |
| if (ph == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ph = h; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_ignore_header_line(ngx_http_request_t *r, ngx_table_elt_t *h, |
| ngx_uint_t offset) |
| { |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_process_limit_rate(ngx_http_request_t *r, ngx_table_elt_t *h, |
| ngx_uint_t offset) |
| { |
| ngx_int_t n; |
| |
| r->upstream->headers_in.x_accel_limit_rate = h; |
| |
| n = ngx_atoi(h->value.data, h->value.len); |
| |
| if (n != NGX_ERROR) { |
| r->limit_rate = (size_t) n; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_copy_header_line(ngx_http_request_t *r, ngx_table_elt_t *h, |
| ngx_uint_t offset) |
| { |
| ngx_table_elt_t *ho, **ph; |
| |
| ho = ngx_list_push(&r->headers_out.headers); |
| if (ho == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ho = *h; |
| |
| if (offset) { |
| ph = (ngx_table_elt_t **) ((char *) &r->headers_out + offset); |
| *ph = ho; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_conditional_copy_header_line(ngx_http_request_t *r, |
| ngx_table_elt_t *h, ngx_uint_t offset) |
| { |
| ngx_flag_t *f; |
| ngx_table_elt_t *ho; |
| |
| f = (ngx_flag_t *) ((char *) r->upstream->conf + offset); |
| |
| if (*f == 0) { |
| return NGX_OK; |
| } |
| |
| ho = ngx_list_push(&r->headers_out.headers); |
| if (ho == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ho = *h; |
| |
| return NGX_OK; |
| } |
| |
| |
| 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) |
| { |
| ngx_array_t *pa; |
| ngx_table_elt_t *ho, **ph; |
| |
| pa = (ngx_array_t *) ((char *) &r->headers_out + offset); |
| |
| if (pa->elts == NULL) { |
| if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK) |
| { |
| return NGX_ERROR; |
| } |
| } |
| |
| ph = ngx_array_push(pa); |
| if (ph == NULL) { |
| return NGX_ERROR; |
| } |
| |
| ho = ngx_list_push(&r->headers_out.headers); |
| if (ho == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ho = *h; |
| *ph = ho; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_copy_content_type(ngx_http_request_t *r, ngx_table_elt_t *h, |
| ngx_uint_t offset) |
| { |
| r->headers_out.content_type = h->value; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_copy_content_length(ngx_http_request_t *r, ngx_table_elt_t *h, |
| ngx_uint_t offset) |
| { |
| ngx_table_elt_t *ho; |
| |
| ho = ngx_list_push(&r->headers_out.headers); |
| if (ho == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ho = *h; |
| |
| r->headers_out.content_length = ho; |
| r->headers_out.content_length_n = ngx_atoof(h->value.data, h->value.len); |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_rewrite_location(ngx_http_request_t *r, ngx_table_elt_t *h, |
| ngx_uint_t offset) |
| { |
| ngx_int_t rc; |
| ngx_table_elt_t *ho; |
| |
| ho = ngx_list_push(&r->headers_out.headers); |
| if (ho == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ho = *h; |
| |
| if (r->upstream->rewrite_redirect) { |
| rc = r->upstream->rewrite_redirect(r, ho, 0); |
| |
| if (rc == NGX_DECLINED) { |
| return NGX_OK; |
| } |
| |
| if (rc == NGX_OK) { |
| r->headers_out.location = ho; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "rewritten location: \"%V\"", &ho->value); |
| } |
| |
| return rc; |
| } |
| |
| /* |
| * we do not set r->headers_out.location here to avoid the handling |
| * the local redirects without a host name by ngx_http_header_filter() |
| */ |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_rewrite_refresh(ngx_http_request_t *r, ngx_table_elt_t *h, |
| ngx_uint_t offset) |
| { |
| u_char *p; |
| ngx_int_t rc; |
| ngx_table_elt_t *ho; |
| |
| ho = ngx_list_push(&r->headers_out.headers); |
| if (ho == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ho = *h; |
| |
| if (r->upstream->rewrite_redirect) { |
| |
| p = (u_char *) ngx_strstr(ho->value.data, "url="); |
| |
| if (p) { |
| rc = r->upstream->rewrite_redirect(r, ho, p + 4 - ho->value.data); |
| |
| } else { |
| return NGX_OK; |
| } |
| |
| if (rc == NGX_DECLINED) { |
| return NGX_OK; |
| } |
| |
| #if (NGX_DEBUG) |
| if (rc == NGX_OK) { |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
| "rewritten refresh: \"%V\"", &ho->value); |
| } |
| #endif |
| |
| return rc; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| #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) |
| { |
| ngx_table_elt_t *ho; |
| |
| ho = ngx_list_push(&r->headers_out.headers); |
| if (ho == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *ho = *h; |
| |
| r->headers_out.content_encoding = ho; |
| |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| |
| static size_t |
| ngx_http_upstream_log_status_getlen(ngx_http_request_t *r, uintptr_t data) |
| { |
| if (r->upstream) { |
| return r->upstream->states.nelts * (3 + 2); |
| } |
| |
| return 1; |
| } |
| |
| |
| static u_char * |
| ngx_http_upstream_log_status(ngx_http_request_t *r, u_char *buf, |
| ngx_http_log_op_t *op) |
| { |
| ngx_uint_t i; |
| ngx_http_upstream_t *u; |
| ngx_http_upstream_state_t *state; |
| |
| u = r->upstream; |
| |
| if (u == NULL || u->states.nelts == 0) { |
| *buf = '-'; |
| return buf + 1; |
| } |
| |
| i = 0; |
| state = u->states.elts; |
| |
| for ( ;; ) { |
| if (state[i].status == 0) { |
| *buf++ = '-'; |
| |
| } else { |
| buf = ngx_sprintf(buf, "%ui", state[i].status); |
| } |
| |
| if (++i == u->states.nelts) { |
| return buf; |
| } |
| |
| *buf++ = ','; |
| *buf++ = ' '; |
| } |
| } |
| |
| |
| static size_t |
| ngx_http_upstream_log_response_time_getlen(ngx_http_request_t *r, |
| uintptr_t data) |
| { |
| if (r->upstream) { |
| return r->upstream->states.nelts * (NGX_TIME_T_LEN + 4 + 2); |
| } |
| |
| return 1; |
| } |
| |
| |
| static u_char * |
| ngx_http_upstream_log_response_time(ngx_http_request_t *r, u_char *buf, |
| ngx_http_log_op_t *op) |
| { |
| ngx_uint_t i; |
| ngx_http_upstream_t *u; |
| ngx_http_upstream_state_t *state; |
| |
| u = r->upstream; |
| |
| if (u == NULL || u->states.nelts == 0) { |
| *buf = '-'; |
| return buf + 1; |
| } |
| |
| i = 0; |
| state = u->states.elts; |
| |
| for ( ;; ) { |
| if (state[i].status == 0) { |
| *buf++ = '-'; |
| |
| } else { |
| buf = ngx_sprintf(buf, "%d.%03d", |
| state[i].response_time / 1000, |
| state[i].response_time % 1000); |
| } |
| |
| if (++i == u->states.nelts) { |
| return buf; |
| } |
| |
| *buf++ = ','; |
| *buf++ = ' '; |
| } |
| } |
| |
| |
| static u_char * |
| ngx_http_upstream_log_error(ngx_http_request_t *r, u_char *buf, size_t len) |
| { |
| u_char *p; |
| ngx_http_upstream_t *u; |
| ngx_peer_connection_t *peer; |
| |
| u = r->upstream; |
| peer = &u->peer; |
| |
| p = ngx_snprintf(buf, len, |
| ", server: %V, URL: \"%V\"," |
| " upstream: \"%V%V%s%V\"", |
| &r->server_name, |
| &r->unparsed_uri, |
| &u->conf->schema, |
| &peer->peers->peer[peer->cur_peer].name, |
| peer->peers->peer[peer->cur_peer].uri_separator, |
| &u->uri); |
| len -= p - buf; |
| buf = p; |
| |
| return ngx_http_log_error_info(r, buf, len); |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_add_variables(ngx_conf_t *cf) |
| { |
| ngx_http_variable_t *var, *v; |
| ngx_http_log_op_name_t *op; |
| |
| for (v = ngx_http_upstream_vars; v->name.len; v++) { |
| var = ngx_http_add_variable(cf, &v->name, v->flags); |
| if (var == NULL) { |
| return NGX_ERROR; |
| } |
| |
| var->get_handler = v->get_handler; |
| var->data = v->data; |
| } |
| |
| for (op = ngx_http_upstream_log_fmt_ops; op->name.len; op++) { /* void */ } |
| op->run = NULL; |
| |
| for (op = ngx_http_log_fmt_ops; op->run; op++) { |
| if (op->name.len == 0) { |
| op = (ngx_http_log_op_name_t *) op->run; |
| } |
| } |
| |
| op->run = (ngx_http_log_op_run_pt) ngx_http_upstream_log_fmt_ops; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_status_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data) |
| { |
| u_char *p; |
| size_t len; |
| ngx_uint_t i; |
| ngx_http_upstream_t *u; |
| ngx_http_upstream_state_t *state; |
| |
| v->valid = 1; |
| v->no_cachable = 0; |
| v->not_found = 0; |
| |
| u = r->upstream; |
| |
| if (u == NULL || u->states.nelts == 0) { |
| v->not_found = 1; |
| return NGX_OK; |
| } |
| |
| len = u->states.nelts * (3 + 2); |
| |
| p = ngx_palloc(r->pool, len); |
| if (p == NULL) { |
| return NGX_ERROR; |
| } |
| |
| v->data = p; |
| |
| i = 0; |
| state = u->states.elts; |
| |
| for ( ;; ) { |
| if (state[i].status == 0) { |
| *p++ = '-'; |
| |
| } else { |
| p = ngx_sprintf(p, "%ui", state[i].status); |
| } |
| |
| if (++i == u->states.nelts) { |
| break; |
| } |
| |
| *p++ = ','; |
| *p++ = ' '; |
| } |
| |
| v->len = p - v->data; |
| |
| return NGX_OK; |
| } |
| |
| |
| static ngx_int_t |
| ngx_http_upstream_response_time_variable(ngx_http_request_t *r, |
| ngx_http_variable_value_t *v, uintptr_t data) |
| { |
| u_char *p; |
| size_t len; |
| ngx_uint_t i; |
| ngx_http_upstream_t *u; |
| ngx_http_upstream_state_t *state; |
| |
| v->valid = 1; |
| v->no_cachable = 0; |
| v->not_found = 0; |
| |
| u = r->upstream; |
| |
| if (u == NULL || u->states.nelts == 0) { |
| v->not_found = 1; |
| return NGX_OK; |
| } |
| |
| len = u->states.nelts * (NGX_TIME_T_LEN + 4 + 2); |
| |
| p = ngx_palloc(r->pool, len); |
| if (p == NULL) { |
| return NGX_ERROR; |
| } |
| |
| v->data = p; |
| |
| i = 0; |
| state = u->states.elts; |
| |
| for ( ;; ) { |
| if (state[i].status == 0) { |
| *p++ = '-'; |
| |
| } else { |
| p = ngx_sprintf(p, "%d.%03d", |
| state[i].response_time / 1000, |
| state[i].response_time % 1000); |
| } |
| |
| if (++i == u->states.nelts) { |
| break; |
| } |
| |
| *p++ = ','; |
| *p++ = ' '; |
| } |
| |
| v->len = p - v->data; |
| |
| return NGX_OK; |
| } |
| |
| |
| static void * |
| ngx_http_upstream_create_main_conf(ngx_conf_t *cf) |
| { |
| ngx_http_upstream_main_conf_t *umcf; |
| |
| umcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_upstream_main_conf_t)); |
| if (umcf == NULL) { |
| return NULL; |
| } |
| |
| return umcf; |
| } |
| |
| |
| static char * |
| ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf) |
| { |
| ngx_http_upstream_main_conf_t *umcf = conf; |
| |
| umcf->headers_in_hash.max_size = 100; |
| umcf->headers_in_hash.bucket_limit = 1; |
| umcf->headers_in_hash.bucket_size = sizeof(ngx_http_upstream_header_t); |
| umcf->headers_in_hash.name = "upstream_headers_in"; |
| |
| if (ngx_hash0_init(&umcf->headers_in_hash, cf->pool, |
| ngx_http_upstream_headers_in, 0) != NGX_OK) |
| { |
| return NGX_CONF_ERROR; |
| } |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_HTTP, cf->log, 0, |
| "http upstream headers_in hash size: %ui, " |
| "max buckets per entry: %ui", |
| umcf->headers_in_hash.hash_size, |
| umcf->headers_in_hash.min_buckets); |
| |
| return NGX_CONF_OK; |
| } |