Mercurial > hg > nginx-vendor-0-5
view src/http/ngx_http_request.c @ 45:09c688b472a7
Added tag NGINX_0_1_22 for changeset 4989c3d25945
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Tue, 22 Feb 2005 00:00:00 +0300 |
parents | 4989c3d25945 |
children | 9f3205d496a0 |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_http.h> static void ngx_http_init_request(ngx_event_t *ev); #if (NGX_HTTP_SSL) static void ngx_http_ssl_handshake(ngx_event_t *rev); #endif static void ngx_http_process_request_line(ngx_event_t *rev); static void ngx_http_process_request_headers(ngx_event_t *rev); static ssize_t ngx_http_read_request_header(ngx_http_request_t *r); static ngx_int_t ngx_http_alloc_large_header_buffer(ngx_http_request_t *r, ngx_uint_t request_line); static ngx_int_t ngx_http_process_request_header(ngx_http_request_t *r); static ngx_int_t ngx_http_find_virtual_server(ngx_http_request_t *r); static void ngx_http_set_write_handler(ngx_http_request_t *r); static void ngx_http_block_read(ngx_event_t *ev); static void ngx_http_read_discarded_body_event(ngx_event_t *rev); static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r); static void ngx_http_set_keepalive(ngx_http_request_t *r); static void ngx_http_keepalive_handler(ngx_event_t *ev); static void ngx_http_set_lingering_close(ngx_http_request_t *r); static void ngx_http_lingering_close_handler(ngx_event_t *ev); static void ngx_http_client_error(ngx_http_request_t *r, int client_error, int error); static u_char *ngx_http_log_error(ngx_log_t *log, u_char *buf, size_t len); /* NGX_HTTP_PARSE_... errors */ static char *client_header_errors[] = { "client %V sent invalid method \"%V\"", "client %V sent invalid request \"%V\"", "client %V sent too long URI in request \"%V\"", "client %V sent invalid method in HTTP/0.9 request \"%V\"", "client %V sent invalid header, URL: \"%V\"", "client %V sent too long header line, URL: \"%V\"", "client %V sent HTTP/1.1 request without \"Host\" header, URL: \"%V\"", "client %V sent invalid \"Content-Length\" header, URL: \"%V\"", "client %V sent POST method without \"Content-Length\" header, URL: \"%V\"", }; ngx_http_header_t ngx_http_headers_in[] = { { ngx_string("Host"), offsetof(ngx_http_headers_in_t, host) }, { ngx_string("Connection"), offsetof(ngx_http_headers_in_t, connection) }, { ngx_string("If-Modified-Since"), offsetof(ngx_http_headers_in_t, if_modified_since) }, { ngx_string("User-Agent"), offsetof(ngx_http_headers_in_t, user_agent) }, { ngx_string("Referer"), offsetof(ngx_http_headers_in_t, referer) }, { ngx_string("Content-Length"), offsetof(ngx_http_headers_in_t, content_length) }, { ngx_string("Content-Type"), offsetof(ngx_http_headers_in_t, content_type) }, { ngx_string("Range"), offsetof(ngx_http_headers_in_t, range) }, #if 0 { ngx_string("If-Range"), offsetof(ngx_http_headers_in_t, if_range) }, #endif #if (NGX_HTTP_GZIP) { ngx_string("Accept-Encoding"), offsetof(ngx_http_headers_in_t, accept_encoding) }, { ngx_string("Via"), offsetof(ngx_http_headers_in_t, via) }, #endif { ngx_string("Authorization"), offsetof(ngx_http_headers_in_t, authorization) }, { ngx_string("Keep-Alive"), offsetof(ngx_http_headers_in_t, keep_alive) }, #if (NGX_HTTP_PROXY) { ngx_string("X-Forwarded-For"), offsetof(ngx_http_headers_in_t, x_forwarded_for) }, { ngx_string("X-Real-IP"), offsetof(ngx_http_headers_in_t, x_real_ip) }, { ngx_string("X-URL"), offsetof(ngx_http_headers_in_t, x_url) }, #endif #if (NGX_HTTP_HEADERS) { ngx_string("Accept"), offsetof(ngx_http_headers_in_t, accept) }, { ngx_string("Accept-Language"), offsetof(ngx_http_headers_in_t, accept_language) }, { ngx_string("Via"), offsetof(ngx_http_headers_in_t, via) }, #endif { ngx_null_string, 0 } }; #if 0 static void ngx_http_dummy(ngx_event_t *wev) { return; } #endif void ngx_http_init_connection(ngx_connection_t *c) { ngx_event_t *rev; ngx_http_log_ctx_t *ctx; if (!(ctx = ngx_palloc(c->pool, sizeof(ngx_http_log_ctx_t)))) { ngx_http_close_connection(c); return; } ctx->client = &c->addr_text; ctx->request = NULL; c->log->connection = c->number; c->log->handler = ngx_http_log_error; c->log->data = ctx; c->log->action = "reading client request line"; c->log_error = NGX_ERROR_INFO; rev = c->read; rev->event_handler = ngx_http_init_request; /* STUB: epoll edge */ c->write->event_handler = ngx_http_empty_handler; if (rev->ready) { /* the deferred accept(), rtsig, aio, iocp */ if (ngx_accept_mutex) { if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) { ngx_http_close_connection(c); return; } ngx_post_event(rev); ngx_mutex_unlock(ngx_posted_events_mutex); #if (NGX_STAT_STUB) ngx_atomic_inc(ngx_stat_reading); #endif return; } #if (NGX_STAT_STUB) ngx_atomic_inc(ngx_stat_reading); #endif ngx_http_init_request(rev); return; } ngx_add_timer(rev, c->listening->post_accept_timeout); if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { ngx_http_close_connection(c); return; } #if 0 /* TODO: learn SO_SNDBUF (to use in zerocopy) via kqueue's EV_CLEAR event */ c->write->ready = 0; c->write->event_handler = ngx_http_dummy; if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) { ngx_http_close_connection(c); return; } #endif #if (NGX_STAT_STUB) ngx_atomic_inc(ngx_stat_reading); #endif } static void ngx_http_init_request(ngx_event_t *rev) { ngx_uint_t i; socklen_t len; struct sockaddr_in sin; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_in_port_t *in_port; ngx_http_in_addr_t *in_addr; ngx_http_connection_t *hc; ngx_http_server_name_t *server_name; ngx_http_core_srv_conf_t *cscf; ngx_http_core_loc_conf_t *clcf; #if (NGX_HTTP_SSL) ngx_http_ssl_srv_conf_t *sscf; #endif c = rev->data; if (rev->timedout) { ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); #if (NGX_STAT_STUB) ngx_atomic_dec(ngx_stat_reading); #endif ngx_http_close_connection(c); return; } hc = c->data; if (hc) { #if (NGX_STAT_STUB) ngx_atomic_inc(ngx_stat_reading); #endif } else { if (!(hc = ngx_pcalloc(c->pool, sizeof(ngx_http_connection_t)))) { #if (NGX_STAT_STUB) ngx_atomic_dec(ngx_stat_reading); #endif ngx_http_close_connection(c); return; } } r = hc->request; if (r) { ngx_memzero(r, sizeof(ngx_http_request_t)); r->pipeline = hc->pipeline; if (hc->nbusy) { r->header_in = hc->busy[0]; } } else { if (!(r = ngx_pcalloc(c->pool, sizeof(ngx_http_request_t)))) { #if (NGX_STAT_STUB) ngx_atomic_dec(ngx_stat_reading); #endif ngx_http_close_connection(c); return; } hc->request = r; } #if (NGX_STAT_STUB) ngx_atomic_dec(ngx_stat_reading); #endif c->data = r; r->http_connection = hc; c->sent = 0; r->signature = NGX_HTTP_MODULE; /* find the server configuration for the address:port */ /* AF_INET only */ in_port = c->servers; in_addr = in_port->addrs.elts; r->port = in_port->port; r->port_text = &in_port->port_text; i = 0; if (in_port->addrs.nelts > 1) { /* * There are several addresses on this port and one of them * is the "*:port" wildcard so getsockname() is needed to determine * the server address. * * AcceptEx() already gave this address. */ #if (NGX_WIN32) if (c->local_sockaddr) { r->in_addr = ((struct sockaddr_in *) c->local_sockaddr)->sin_addr.s_addr; } else #endif { len = sizeof(struct sockaddr_in); if (getsockname(c->fd, (struct sockaddr *) &sin, &len) == -1) { ngx_connection_error(c, ngx_socket_errno, "getsockname() failed"); ngx_http_close_connection(c); return; } r->in_addr = sin.sin_addr.s_addr; } /* the last in_port->addrs address is "*" */ for ( /* void */ ; i < in_port->addrs.nelts - 1; i++) { if (in_addr[i].addr == r->in_addr) { break; } } } else { r->in_addr = in_addr[0].addr; } r->virtual_names = &in_addr[i]; /* the default server configuration for the address:port */ cscf = in_addr[i].core_srv_conf; r->main_conf = cscf->ctx->main_conf; r->srv_conf = cscf->ctx->srv_conf; r->loc_conf = cscf->ctx->loc_conf; rev->event_handler = ngx_http_process_request_line; #if (NGX_HTTP_SSL) sscf = ngx_http_get_module_srv_conf(r, ngx_http_ssl_module); if (sscf->enable) { if (c->ssl == NULL) { if (ngx_ssl_create_session(sscf->ssl_ctx, c, NGX_SSL_BUFFER) == NGX_ERROR) { ngx_http_close_connection(c); return; } rev->event_handler = ngx_http_ssl_handshake; /* * The majority of browsers do not send the "close notify" alert. * Among them are MSIE, Mozilla, Netscape 4, Konqueror, and Links. * And what is more MSIE ignores the server's alert. * * Opera always sends the alert. */ c->ssl->no_rcv_shut = 1; } r->filter_need_in_memory = 1; } #endif server_name = cscf->server_names.elts; r->server_name = server_name->name; clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); c->log->file = clcf->err_log->file; if (!(c->log->log_level & NGX_LOG_DEBUG_CONNECTION)) { c->log->log_level = clcf->err_log->log_level; } if (c->buffer == NULL) { c->buffer = ngx_create_temp_buf(c->pool, cscf->client_header_buffer_size); if (c->buffer == NULL) { ngx_http_close_connection(c); return; } } if (r->header_in == NULL) { r->header_in = c->buffer; } if (!(r->pool = ngx_create_pool(cscf->request_pool_size, c->log))) { ngx_http_close_connection(c); return; } if (ngx_array_init(&r->cleanup, r->pool, 5, sizeof(ngx_http_cleanup_t)) == NGX_ERROR) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } if (ngx_list_init(&r->headers_out.headers, r->pool, 20, sizeof(ngx_table_elt_t)) == NGX_ERROR) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } r->ctx = ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module); if (r->ctx == NULL) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } c->single_connection = 1; r->connection = c; r->file.fd = NGX_INVALID_FILE; r->headers_in.content_length_n = -1; r->headers_in.keep_alive_n = -1; r->headers_out.content_length_n = -1; r->headers_out.last_modified_time = -1; r->http_state = NGX_HTTP_READING_REQUEST_STATE; #if (NGX_STAT_STUB) ngx_atomic_inc(ngx_stat_reading); r->stat_reading = 1; ngx_atomic_inc(ngx_stat_requests); #endif rev->event_handler(rev); } #if (NGX_HTTP_SSL) static void ngx_http_ssl_handshake(ngx_event_t *rev) { u_char buf[1]; ssize_t n; ngx_int_t rc; ngx_connection_t *c; ngx_http_request_t *r; c = rev->data; r = c->data; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http check ssl handshake"); if (rev->timedout) { ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT); return; } n = recv(c->fd, buf, 1, MSG_PEEK); if (n == -1 && ngx_socket_errno == NGX_EAGAIN) { return; } if (n == 1) { if (buf[0] == 0x80 /* SSLv2 */ || buf[0] == 0x16 /* SSLv3/TLSv1 */) { ngx_log_debug1(NGX_LOG_DEBUG_HTTP, rev->log, 0, "https ssl handshake: 0x%02Xd", buf[0]); c->recv = ngx_ssl_recv; c->send_chain = ngx_ssl_send_chain; rc = ngx_ssl_handshake(c); if (rc == NGX_ERROR) { ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST); ngx_http_close_connection(r->connection); return; } if (rc != NGX_OK) { return; } } else { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "plain http"); r->plain_http = 1; } } rev->event_handler = ngx_http_process_request_line; ngx_http_process_request_line(rev); } #endif static void ngx_http_process_request_line(ngx_event_t *rev) { ssize_t n; ngx_int_t rc, rv; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_log_ctx_t *ctx; c = rev->data; r = c->data; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http process request line"); if (rev->timedout) { ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT); return; } rc = NGX_AGAIN; for ( ;; ) { if (rc == NGX_AGAIN) { n = ngx_http_read_request_header(r); if (n == NGX_AGAIN || n == NGX_ERROR) { return; } } rc = ngx_http_parse_request_line(r, r->header_in); if (rc == NGX_OK) { /* the request line has been parsed successfully */ r->request_line.len = r->request_end - r->request_start; r->request_line.data = r->request_start; if (r->args_start) { r->uri.len = r->args_start - 1 - r->uri_start; } else { r->uri.len = r->uri_end - r->uri_start; } if (r->complex_uri || r->quoted_uri) { if (!(r->uri.data = ngx_palloc(r->pool, r->uri.len + 1))) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } rc = ngx_http_parse_complex_uri(r); if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) { ngx_http_close_request(r, rc); ngx_http_close_connection(c); return; } if (rc != NGX_OK) { ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST); return; } } else { r->uri.data = r->uri_start; } r->unparsed_uri.len = r->uri_end - r->uri_start; r->unparsed_uri.data = r->uri_start; if (r->method == 0) { r->method_name.len = r->method_end - r->request_start + 1; r->method_name.data = r->request_line.data; } if (r->http_protocol.data) { r->http_protocol.len = r->request_end - r->http_protocol.data; } if (r->uri_ext) { if (r->args_start) { r->exten.len = r->args_start - 1 - r->uri_ext; } else { r->exten.len = r->uri_end - r->uri_ext; } r->exten.data = r->uri_ext; } if (r->args_start && r->uri_end > r->args_start) { r->args.len = r->uri_end - r->args_start; r->args.data = r->args_start; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http request line: \"%V\"", &r->request_line); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http uri: \"%V\"", &r->uri); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http args: \"%V\"", &r->args); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http exten: \"%V\"", &r->exten); ctx = c->log->data; ctx->request = r; if (r->http_version < NGX_HTTP_VERSION_10) { rev->event_handler = ngx_http_block_read; ngx_http_handler(r); return; } if (ngx_list_init(&r->headers_in.headers, r->pool, 20, sizeof(ngx_table_elt_t)) == NGX_ERROR) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } if (ngx_array_init(&r->headers_in.cookies, r->pool, 5, sizeof(ngx_table_elt_t *)) == NGX_ERROR) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } c->log->action = "reading client request headers"; rev->event_handler = ngx_http_process_request_headers; ngx_http_process_request_headers(rev); return; } else if (rc != NGX_AGAIN) { /* there was error while a request line parsing */ ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST); #if 0 for (p = r->request_start; p < r->header_in->last; p++) { if (*p == CR || *p == LF) { break; } } r->request_line.len = p - r->request_start; r->request_line.data = r->request_start; if (rc == NGX_HTTP_PARSE_INVALID_METHOD) { r->http_version = NGX_HTTP_VERSION_10; } ngx_http_client_error(r, rc, (rc == NGX_HTTP_PARSE_INVALID_METHOD) ? NGX_HTTP_NOT_IMPLEMENTED: NGX_HTTP_BAD_REQUEST); #endif return; } /* NGX_AGAIN: a request line parsing is still incomplete */ if (r->header_in->pos == r->header_in->end) { rv = ngx_http_alloc_large_header_buffer(r, 1); if (rv == NGX_ERROR) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } if (rv == NGX_DECLINED) { ngx_http_client_error(r, NGX_HTTP_PARSE_TOO_LONG_URI, NGX_HTTP_REQUEST_URI_TOO_LARGE); return; } } } } static void ngx_http_process_request_headers(ngx_event_t *rev) { ssize_t n; ngx_int_t rc, rv, i; ngx_table_elt_t *h, **cookie; ngx_connection_t *c; ngx_http_request_t *r; c = rev->data; r = c->data; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http process request header line"); if (rev->timedout) { ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT); return; } rc = NGX_AGAIN; for ( ;; ) { if (rc == NGX_AGAIN) { if (r->header_in->pos == r->header_in->end) { rv = ngx_http_alloc_large_header_buffer(r, 0); if (rv == NGX_ERROR) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } if (rv == NGX_DECLINED) { ngx_http_client_error(r, NGX_HTTP_PARSE_TOO_LONG_HEADER, NGX_HTTP_BAD_REQUEST); return; } } n = ngx_http_read_request_header(r); if (n == NGX_AGAIN || n == NGX_ERROR) { return; } } rc = ngx_http_parse_header_line(r, r->header_in); if (rc == NGX_OK) { /* a header line has been parsed successfully */ r->headers_n++; if (!(h = ngx_list_push(&r->headers_in.headers))) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } h->key.len = r->header_name_end - r->header_name_start; h->key.data = r->header_name_start; h->key.data[h->key.len] = '\0'; h->value.len = r->header_end - r->header_start; h->value.data = r->header_start; h->value.data[h->value.len] = '\0'; if (h->key.len == sizeof("Cookie") - 1 && ngx_strcasecmp(h->key.data, "Cookie") == 0) { if (!(cookie = ngx_array_push(&r->headers_in.cookies))) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } *cookie = h; } else { for (i = 0; ngx_http_headers_in[i].name.len != 0; i++) { if (ngx_http_headers_in[i].name.len != h->key.len) { continue; } if (ngx_strcasecmp(ngx_http_headers_in[i].name.data, h->key.data) == 0) { *((ngx_table_elt_t **) ((char *) &r->headers_in + ngx_http_headers_in[i].offset)) = h; break; } } } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http header: \"%V: %V\"", &h->key, &h->value); continue; } else if (rc == NGX_HTTP_PARSE_HEADER_DONE) { /* a whole header has been parsed successfully */ ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http header done"); r->request_length += r->header_in->pos - r->header_in->start; r->http_state = NGX_HTTP_PROCESS_REQUEST_STATE; rc = ngx_http_process_request_header(r); if (rc != NGX_OK) { ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST); return; } if (rev->timer_set) { ngx_del_timer(rev); } #if (NGX_STAT_STUB) ngx_atomic_dec(ngx_stat_reading); r->stat_reading = 0; ngx_atomic_inc(ngx_stat_writing); r->stat_writing = 1; #endif rev->event_handler = ngx_http_block_read; ngx_http_handler(r); return; } else if (rc != NGX_AGAIN) { /* there was error while a header line parsing */ #if (NGX_DEBUG) if (rc == NGX_HTTP_PARSE_INVALID_HEADER && (rev->log->log_level & NGX_LOG_DEBUG_HTTP)) { u_char *p; for (p = r->header_name_start; p < r->header_in->last - 1; p++) { if (*p == LF) { break; } } *p = '\0'; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http invalid header: \"%s\"", r->header_name_start); } #endif ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST); return; } /* NGX_AGAIN: a header line parsing is still not complete */ } } static ssize_t ngx_http_read_request_header(ngx_http_request_t *r) { ssize_t n; ngx_event_t *rev; ngx_http_core_srv_conf_t *cscf; rev = r->connection->read; n = r->header_in->last - r->header_in->pos; if (n > 0) { return n; } if (!rev->ready) { return NGX_AGAIN; } n = r->connection->recv(r->connection, r->header_in->last, r->header_in->end - r->header_in->last); if (n == NGX_AGAIN) { if (!r->header_timeout_set) { cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); ngx_add_timer(rev, cscf->client_header_timeout); r->header_timeout_set = 1; } if (ngx_handle_read_event(rev, 0) == NGX_ERROR) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(r->connection); return NGX_ERROR; } return NGX_AGAIN; } if (n == 0) { ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, "client closed prematurely connection"); } if (n == 0 || n == NGX_ERROR) { ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST); ngx_http_close_connection(r->connection); return NGX_ERROR; } r->header_in->last += n; return n; } static ngx_int_t ngx_http_alloc_large_header_buffer(ngx_http_request_t *r, ngx_uint_t request_line) { u_char *old, *new; ngx_buf_t *b; ngx_http_connection_t *hc; ngx_http_core_srv_conf_t *cscf; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http alloc large header buffer"); if (request_line && r->state == 0) { /* the client fills up the buffer with "\r\n" */ r->request_length += r->header_in->end - r->header_in->start; r->header_in->pos = r->header_in->start; r->header_in->last = r->header_in->start; return NGX_OK; } old = request_line ? r->request_start : r->header_name_start; cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); if (r->state != 0 && (size_t) (r->header_in->pos - old) >= cscf->large_client_header_buffers.size) { return NGX_DECLINED; } hc = r->http_connection; if (hc->nfree) { b = hc->free[--hc->nfree]; ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http large header free: %p %uz", b->pos, b->end - b->last); } else if (hc->nbusy < cscf->large_client_header_buffers.num) { if (hc->busy == NULL) { hc->busy = ngx_palloc(r->connection->pool, cscf->large_client_header_buffers.num * sizeof(ngx_buf_t *)); if (hc->busy == NULL) { return NGX_ERROR; } } b = ngx_create_temp_buf(r->connection->pool, cscf->large_client_header_buffers.size); if (b == NULL) { return NGX_ERROR; } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http large header alloc: %p %uz", b->pos, b->end - b->last); } else { return NGX_DECLINED; } hc->busy[hc->nbusy++] = b; if (r->state == 0) { /* * r->state == 0 means that a header line was parsed successfully * and we do not need to copy incomplete header line and * to relocate the parser header pointers */ r->request_length += r->header_in->end - r->header_in->start; r->header_in = b; return NGX_OK; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http large header copy: %d", r->header_in->pos - old); r->request_length += old - r->header_in->start; new = b->start; ngx_memcpy(new, old, r->header_in->pos - old); b->pos = new + (r->header_in->pos - old); b->last = new + (r->header_in->pos - old); if (request_line) { r->request_start = new; if (r->request_end) { r->request_end = new + (r->request_end - old); } r->method_end = new + (r->method_end - old); r->uri_start = new + (r->uri_start - old); r->uri_end = new + (r->uri_end - old); if (r->schema_start) { r->schema_start = new + (r->schema_start - old); r->schema_end = new + (r->schema_end - old); } if (r->host_start) { r->host_start = new + (r->host_start - old); r->host_end = new + (r->host_end - old); } if (r->port_start) { r->port_start = new + (r->port_start - old); r->port_end = new + (r->port_end - old); } if (r->uri_ext) { r->uri_ext = new + (r->uri_ext - old); } if (r->args_start) { r->args_start = new + (r->args_start - old); } } else { r->header_name_start = new; r->header_name_end = new + (r->header_name_end - old); r->header_start = new + (r->header_start - old); r->header_end = new + (r->header_end - old); } r->header_in = b; return NGX_OK; } static ngx_int_t ngx_http_process_request_header(ngx_http_request_t *r) { u_char *ua, *user_agent, ch; size_t len; if (r->headers_in.host) { for (len = 0; len < r->headers_in.host->value.len; len++) { ch = r->headers_in.host->value.data[len]; if (ch == ':') { break; } r->headers_in.host->value.data[len] = ngx_tolower(ch); } r->headers_in.host_name_len = len; if (ngx_http_find_virtual_server(r) != NGX_OK) { return NGX_HTTP_PARSE_INVALID_HOST; } } else { if (r->http_version > NGX_HTTP_VERSION_10) { return NGX_HTTP_PARSE_NO_HOST_HEADER; } r->headers_in.host_name_len = 0; } if (r->headers_in.content_length) { r->headers_in.content_length_n = ngx_atoi(r->headers_in.content_length->value.data, r->headers_in.content_length->value.len); if (r->headers_in.content_length_n == NGX_ERROR) { return NGX_HTTP_PARSE_INVALID_CL_HEADER; } } if (r->method == NGX_HTTP_POST && r->headers_in.content_length_n == -1) { return NGX_HTTP_PARSE_POST_WO_CL_HEADER; } if (r->plain_http) { return NGX_HTTP_PARSE_HTTP_TO_HTTPS; } if (r->headers_in.connection) { if (r->headers_in.connection->value.len == 5 && ngx_strcasecmp(r->headers_in.connection->value.data, "close") == 0) { r->headers_in.connection_type = NGX_HTTP_CONNECTION_CLOSE; } else if (r->headers_in.connection->value.len == 10 && ngx_strcasecmp(r->headers_in.connection->value.data, "keep-alive") == 0) { r->headers_in.connection_type = NGX_HTTP_CONNECTION_KEEP_ALIVE; if (r->headers_in.keep_alive) { r->headers_in.keep_alive_n = ngx_atoi(r->headers_in.keep_alive->value.data, r->headers_in.keep_alive->value.len); } } } if (r->headers_in.user_agent) { /* * check some widespread browsers while the headers are still * in CPU cache */ user_agent = r->headers_in.user_agent->value.data; ua = (u_char *) ngx_strstr(user_agent, "MSIE"); if (ua && ua + 8 < user_agent + r->headers_in.user_agent->value.len) { r->headers_in.msie = 1; if (ua[4] == ' ' && ua[5] == '4' && ua[6] == '.') { r->headers_in.msie4 = 1; } #if 0 /* MSIE ignores the SSL "close notify" alert */ if (c->ssl) { r->connection->ssl->no_send_shut = 1; } #endif } if (ngx_strstr(user_agent, "Opera")) { r->headers_in.opera = 1; r->headers_in.msie = 0; r->headers_in.msie4 = 0; } if (!r->headers_in.msie && !r->headers_in.opera) { if (ngx_strstr(user_agent, "Gecko/")) { r->headers_in.gecko = 1; } else if (ngx_strstr(user_agent, "Konqueror")) { r->headers_in.konqueror = 1; } } } return NGX_OK; } static ngx_int_t ngx_http_find_virtual_server(ngx_http_request_t *r) { ngx_int_t rc; ngx_uint_t i, n, key, found; ngx_http_server_name_t *name; ngx_http_core_main_conf_t *cmcf; ngx_http_core_srv_conf_t *cscf; ngx_http_core_loc_conf_t *clcf; if (r->virtual_names->hash) { cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module); ngx_http_server_names_hash_key(key, r->headers_in.host->value.data, r->headers_in.host_name_len, cmcf->server_names_hash); name = r->virtual_names->hash[key].elts; n = r->virtual_names->hash[key].nelts; } else { name = r->virtual_names->names.elts; n = r->virtual_names->names.nelts; } found = 0; for (i = 0; i < n; i++) { ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "server name: %V", &name[i].name); if (r->headers_in.host_name_len != name[i].name.len) { continue; } rc = ngx_strncmp(r->headers_in.host->value.data, name[i].name.data, name[i].name.len); if (rc == 0) { r->server_name = name[i].name; found = 1; break; } if (rc < 0) { /* the server names are lexicographically sorted */ break; } } if (!found && r->virtual_names->wildcards.nelts) { name = r->virtual_names->wildcards.elts; for (i = 0; i < r->virtual_names->wildcards.nelts; i++) { ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "server name: %V", &name[i].name); if (r->headers_in.host_name_len <= name[i].name.len) { continue; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "server name: %s", r->headers_in.host->value.data + (r->headers_in.host_name_len - name[i].name.len)); if (ngx_strncmp(r->headers_in.host->value.data + (r->headers_in.host_name_len - name[i].name.len), name[i].name.data, name[i].name.len) == 0) { r->server_name.len = r->headers_in.host_name_len; r->server_name.data = r->headers_in.host->value.data; found = 1; break; } } } if (found) { r->srv_conf = name[i].core_srv_conf->ctx->srv_conf; r->loc_conf = name[i].core_srv_conf->ctx->loc_conf; clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); r->connection->log->file = clcf->err_log->file; if (!(r->connection->log->log_level & NGX_LOG_DEBUG_CONNECTION)) { r->connection->log->log_level = clcf->err_log->log_level; } return NGX_OK; } cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); if (cscf->restrict_host_names != NGX_HTTP_RESTRICT_HOST_OFF) { return NGX_ERROR; } return NGX_OK; } void ngx_http_finalize_request(ngx_http_request_t *r, int rc) { ngx_http_core_loc_conf_t *clcf; /* r may be already destroyed when rc == NGX_DONE */ if (rc == NGX_DONE || r->main) { return; } ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http finalize request: %d", rc); if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { if (r->connection->read->timer_set) { ngx_del_timer(r->connection->read); } if (r->connection->write->timer_set) { ngx_del_timer(r->connection->write); } if (rc == NGX_HTTP_CLIENT_CLOSED_REQUEST || r->closed) { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); return; } ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc)); return; } else if (rc == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); return; } else if (rc == NGX_AGAIN) { ngx_http_set_write_handler(r); return; } if (r->connection->read->timer_set) { ngx_del_timer(r->connection->read); } if (r->connection->write->timer_set) { r->connection->write->delayed = 0; ngx_del_timer(r->connection->write); } if (r->connection->read->pending_eof) { #if (NGX_HAVE_KQUEUE) ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, r->connection->read->kq_errno, "kevent() reported about an closed connection"); #endif ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); return; } clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (!ngx_terminate && !ngx_exiting && r->keepalive != 0 && clcf->keepalive_timeout > 0) { ngx_http_set_keepalive(r); return; } else if (r->lingering_close && clcf->lingering_timeout > 0) { ngx_http_set_lingering_close(r); return; } ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); } static void ngx_http_set_write_handler(ngx_http_request_t *r) { ngx_event_t *wev; ngx_http_core_loc_conf_t *clcf; wev = r->connection->write; wev->event_handler = ngx_http_writer; r->http_state = NGX_HTTP_WRITING_REQUEST_STATE; if (wev->ready && wev->delayed) { return; } clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, ngx_http_core_module); if (!wev->delayed) { ngx_add_timer(wev, clcf->send_timeout); } if (ngx_handle_write_event(wev, clcf->send_lowat) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); } return; } void ngx_http_writer(ngx_event_t *wev) { int rc; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_core_loc_conf_t *clcf; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, "http writer handler"); c = wev->data; r = c->data; if (wev->timedout) { if (!wev->delayed) { ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT); return; } wev->timedout = 0; wev->delayed = 0; if (!wev->ready) { clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, ngx_http_core_module); ngx_add_timer(wev, clcf->send_timeout); if (ngx_handle_write_event(wev, clcf->send_lowat) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); } return; } } else { if (wev->delayed) { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, "http writer delayed"); clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, ngx_http_core_module); if (ngx_handle_write_event(wev, clcf->send_lowat) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); } return; } } rc = ngx_http_output_filter(r, NULL); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http writer output filter: %d", rc); if (rc == NGX_AGAIN) { clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, ngx_http_core_module); if (!wev->ready && !wev->delayed) { ngx_add_timer(wev, clcf->send_timeout); } if (ngx_handle_write_event(wev, clcf->send_lowat) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); } return; } ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http writer done"); ngx_http_finalize_request(r, rc); } static void ngx_http_block_read(ngx_event_t *rev) { ngx_connection_t *c; ngx_http_request_t *r; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http read blocked"); /* aio does not call this handler */ if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && rev->active) { if (ngx_del_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { c = rev->data; r = c->data; ngx_http_close_request(r, 0); ngx_http_close_connection(c); } } } ngx_int_t ngx_http_discard_body(ngx_http_request_t *r) { ssize_t size; ngx_event_t *rev; rev = r->connection->read; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body"); if (rev->timer_set) { ngx_del_timer(rev); } if (r->headers_in.content_length_n <= 0) { return NGX_OK; } size = r->header_in->last - r->header_in->pos; if (size) { if (r->headers_in.content_length_n > size) { r->headers_in.content_length_n -= size; } else { r->header_in->pos += r->headers_in.content_length_n; r->headers_in.content_length_n = 0; return NGX_OK; } } rev->event_handler = ngx_http_read_discarded_body_event; if (ngx_handle_level_read_event(rev) == NGX_ERROR) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } return ngx_http_read_discarded_body(r); } static void ngx_http_read_discarded_body_event(ngx_event_t *rev) { ngx_int_t rc; ngx_connection_t *c; ngx_http_request_t *r; c = rev->data; r = c->data; rc = ngx_http_read_discarded_body(r); if (rc == NGX_AGAIN) { if (ngx_handle_level_read_event(rev) == NGX_ERROR) { ngx_http_close_request(r, rc); ngx_http_close_connection(c); return; } } if (rc != NGX_OK) { ngx_http_close_request(r, rc); ngx_http_close_connection(c); } } static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r) { ssize_t size, n; u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE]; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "http read discarded body"); if (r->headers_in.content_length_n == 0) { return NGX_OK; } size = r->headers_in.content_length_n; if (size > NGX_HTTP_DISCARD_BUFFER_SIZE) { size = NGX_HTTP_DISCARD_BUFFER_SIZE; } n = r->connection->recv(r->connection, buffer, size); if (n == NGX_ERROR) { r->closed = 1; /* * if a client request body is discarded then we already set * some HTTP response code for client and we can ignore the error */ return NGX_OK; } if (n == NGX_AGAIN) { return NGX_AGAIN; } r->headers_in.content_length_n -= n; return NGX_OK; } static void ngx_http_set_keepalive(ngx_http_request_t *r) { int tcp_nodelay; ngx_int_t i; ngx_buf_t *b, *f; ngx_event_t *rev, *wev; ngx_connection_t *c; ngx_http_connection_t *hc; ngx_http_core_srv_conf_t *cscf; ngx_http_core_loc_conf_t *clcf; c = r->connection; rev = c->read; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "set http keepalive handler"); c->log->action = "closing request"; hc = r->http_connection; b = r->header_in; if (b->pos < b->last) { /* the pipelined request */ if (b != c->buffer) { /* * If the large header buffers were allocated while the previous * request processing then we do not use c->buffer for * the pipelined request (see ngx_http_init_request()). * * Now we would move the large header buffers to the free list. */ cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); if (hc->free == NULL) { hc->free = ngx_palloc(c->pool, cscf->large_client_header_buffers.num * sizeof(ngx_buf_t *)); if (hc->free == NULL) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } } for (i = 0; i < hc->nbusy - 1; i++) { f = hc->busy[i]; hc->free[hc->nfree++] = f; f->pos = f->start; f->last = f->start; } hc->busy[0] = b; hc->nbusy = 1; } } clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); ngx_http_close_request(r, 0); c->data = hc; ngx_add_timer(rev, clcf->keepalive_timeout); if (ngx_handle_level_read_event(rev) == NGX_ERROR) { ngx_http_close_connection(c); return; } wev = c->write; wev->event_handler = ngx_http_empty_handler; if (b->pos < b->last) { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "pipelined request"); hc->pipeline = 1; c->log->action = "reading client pipelined request line"; ngx_http_init_request(rev); return; } hc->pipeline = 0; /* * To keep a memory footprint as small as possible for an idle * keepalive connection we try to free the ngx_http_request_t and * c->buffer's memory if they were allocated outside the c->pool. * The large header buffers are always allocated outside the c->pool and * are freed too. */ if (ngx_pfree(c->pool, r) == NGX_OK) { hc->request = NULL; } b = c->buffer; if (ngx_pfree(c->pool, b->start) == NGX_OK) { /* * the special note for ngx_http_keepalive_handler() that * c->buffer's memory was freed */ b->pos = NULL; } else { b->pos = b->start; b->last = b->start; } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, "hc free: %p %d", hc->free, hc->nfree); if (hc->free) { for (i = 0; i < hc->nfree; i++) { ngx_pfree(c->pool, hc->free[i]); hc->free[i] = NULL; } hc->nfree = 0; } ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, "hc busy: %p %d", hc->busy, hc->nbusy); if (hc->busy) { for (i = 0; i < hc->nbusy; i++) { ngx_pfree(c->pool, hc->busy[i]); hc->busy[i] = NULL; } hc->nbusy = 0; } rev->event_handler = ngx_http_keepalive_handler; if (wev->active) { if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_DISABLE_EVENT) == NGX_ERROR) { ngx_http_close_connection(c); return; } } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) { ngx_http_close_connection(c); return; } } } c->log->action = "keepalive"; if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) { if (ngx_tcp_push(c->fd) == NGX_ERROR) { ngx_connection_error(c, ngx_socket_errno, ngx_tcp_push_n " failed"); ngx_http_close_connection(c); return; } c->tcp_nopush = NGX_TCP_NOPUSH_UNSET; tcp_nodelay = ngx_tcp_nodelay_and_tcp_nopush ? 1 : 0; } else { tcp_nodelay = 1; } if (tcp_nodelay && clcf->tcp_nodelay && c->tcp_nodelay == NGX_TCP_NODELAY_UNSET) { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "tcp_nodelay"); 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_close_connection(c); return; } c->tcp_nodelay = NGX_TCP_NODELAY_SET; } #if 0 /* if ngx_http_request_t was freed then we need some other place */ r->http_state = NGX_HTTP_KEEPALIVE_STATE; #endif if (rev->ready) { ngx_http_keepalive_handler(rev); } } static void ngx_http_keepalive_handler(ngx_event_t *rev) { size_t size; ssize_t n; ngx_buf_t *b; ngx_connection_t *c; ngx_http_connection_t *hc; c = rev->data; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http keepalive handler"); if (rev->timedout) { ngx_http_close_connection(c); return; } #if (NGX_HAVE_KQUEUE) if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { if (rev->pending_eof) { c->log->handler = NULL; ngx_log_error(NGX_LOG_INFO, c->log, rev->kq_errno, "kevent() reported that client %V closed " "keepalive connection", &c->addr_text); #if (NGX_HTTP_SSL) if (c->ssl) { c->ssl->no_send_shut = 1; } #endif ngx_http_close_connection(c); return; } } #endif hc = c->data; b = c->buffer; size = b->end - b->start; if (b->pos == NULL) { /* * The c->buffer's memory was freed by ngx_http_set_keepalive(). * However, the c->buffer->start and c->buffer->end were not changed * to keep the buffer size. */ if (!(b->pos = ngx_palloc(c->pool, size))) { ngx_http_close_connection(c); return; } b->start = b->pos; b->last = b->pos; b->end = b->pos + size; } /* * MSIE closes a keepalive connection with RST flag * so we ignore ECONNRESET here. */ c->log_error = NGX_ERROR_IGNORE_ECONNRESET; ngx_set_socket_errno(0); n = c->recv(c, b->last, size); c->log_error = NGX_ERROR_INFO; if (n == NGX_AGAIN) { if (ngx_handle_level_read_event(rev) == NGX_ERROR) { ngx_http_close_connection(c); } return; } if (n == NGX_ERROR) { ngx_http_close_connection(c); return; } c->log->handler = NULL; if (n == 0) { ngx_log_error(NGX_LOG_INFO, c->log, ngx_socket_errno, "client %V closed keepalive connection", &c->addr_text); ngx_http_close_connection(c); return; } b->last += n; c->log->handler = ngx_http_log_error; c->log->action = "reading client request line"; ngx_http_init_request(rev); } static void ngx_http_set_lingering_close(ngx_http_request_t *r) { ngx_event_t *rev, *wev; ngx_connection_t *c; ngx_http_core_loc_conf_t *clcf; c = r->connection; clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); rev = c->read; rev->event_handler = ngx_http_lingering_close_handler; r->lingering_time = ngx_time() + clcf->lingering_time / 1000; ngx_add_timer(rev, clcf->lingering_timeout); if (ngx_handle_level_read_event(rev) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } wev = c->write; wev->event_handler = ngx_http_empty_handler; if (wev->active) { if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) { if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_DISABLE_EVENT) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } } } if (ngx_shutdown_socket(c->fd, NGX_WRITE_SHUTDOWN) == -1) { ngx_connection_error(c, ngx_socket_errno, ngx_shutdown_socket_n " failed"); ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } if (rev->ready) { ngx_http_lingering_close_handler(rev); } } static void ngx_http_lingering_close_handler(ngx_event_t *rev) { ssize_t n; ngx_msec_t timer; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_core_loc_conf_t *clcf; u_char buffer[NGX_HTTP_LINGERING_BUFFER_SIZE]; c = rev->data; r = c->data; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http lingering close handler"); if (rev->timedout) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } timer = r->lingering_time - ngx_time(); if (timer <= 0) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } do { n = c->recv(c, buffer, NGX_HTTP_LINGERING_BUFFER_SIZE); ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "lingering read: %d", n); if (n == NGX_ERROR || n == 0) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } } while (rev->ready); if (ngx_handle_level_read_event(rev) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); timer *= 1000; if (timer > clcf->lingering_timeout) { timer = clcf->lingering_timeout; } ngx_add_timer(rev, timer); } void ngx_http_empty_handler(ngx_event_t *wev) { ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, "http empty handler"); return; } ngx_int_t ngx_http_send_last(ngx_http_request_t *r) { ngx_buf_t *b; ngx_chain_t out; if (!(b = ngx_calloc_buf(r->pool))) { return NGX_ERROR; } b->last_buf = 1; out.buf = b; out.next = NULL; return ngx_http_output_filter(r, &out); } void ngx_http_close_request(ngx_http_request_t *r, int error) { ngx_uint_t i; ngx_log_t *log; ngx_http_log_ctx_t *ctx; ngx_http_cleanup_t *cleanup; ngx_http_core_loc_conf_t *clcf; struct linger l; log = r->connection->log; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http close request"); if (r->pool == NULL) { ngx_log_error(NGX_LOG_ALERT, log, 0, "http request already closed"); return; } #if (NGX_STAT_STUB) if (r->stat_reading) { ngx_atomic_dec(ngx_stat_reading); } if (r->stat_writing) { ngx_atomic_dec(ngx_stat_writing); } #endif if (error && r->headers_out.status == 0) { r->headers_out.status = error; } ngx_http_log_handler(r); cleanup = r->cleanup.elts; for (i = 0; i < r->cleanup.nelts; i++) { if (!cleanup[i].valid) { continue; } #if (NGX_HTTP_CACHE) if (cleanup[i].cache) { ngx_http_cache_unlock(cleanup[i].data.cache.hash, cleanup[i].data.cache.cache, log); continue; } #endif ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http cleanup fd: %d", cleanup[i].data.file.fd); if (ngx_close_file(cleanup[i].data.file.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, ngx_close_file_n " \"%s\" failed", cleanup[i].data.file.name); } } /* STUB */ if (r->file.fd != NGX_INVALID_FILE) { if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, ngx_close_file_n " \"%V\" failed", &r->file.name); } } if (r->request_body && r->request_body->temp_file && r->request_body->temp_file->file.fd != NGX_INVALID_FILE) { if (ngx_close_file(r->request_body->temp_file->file.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, ngx_close_file_n " deleted file \"%V\" failed", &r->request_body->temp_file->file.name); } } if (r->connection->timedout) { clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (clcf->reset_timedout_connection) { l.l_onoff = 1; l.l_linger = 0; if (setsockopt(r->connection->fd, SOL_SOCKET, SO_LINGER, (const void *) &l, sizeof(struct linger)) == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_socket_errno, "setsockopt(SO_LINGER) failed"); } } } /* the variuos request strings were allocated from r->pool */ ctx = log->data; ctx->request = NULL; r->request_line.len = 0; ngx_destroy_pool(r->pool); } #if (NGX_HTTP_SSL) void ngx_ssl_close_handler(ngx_event_t *ev) { ngx_connection_t *c; c = ev->data; ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, "http ssl close handler"); if (ngx_ssl_shutdown(c) == NGX_AGAIN) { return; } ngx_http_close_connection(c); } #endif void ngx_http_close_connection(ngx_connection_t *c) { ngx_pool_t *pool; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "close http connection: %d", c->fd); #if (NGX_OPENSSL) if (c->ssl) { if (ngx_ssl_shutdown(c) == NGX_AGAIN) { c->read->event_handler = ngx_ssl_close_handler; c->write->event_handler = ngx_ssl_close_handler; return; } } #endif #if (NGX_STAT_STUB) ngx_atomic_dec(ngx_stat_active); #endif pool = c->pool; ngx_close_connection(c); ngx_destroy_pool(c->pool); } static void ngx_http_client_error(ngx_http_request_t *r, int client_error, int error) { u_char *p; ngx_http_log_ctx_t *ctx; ngx_http_core_srv_conf_t *cscf; ctx = r->connection->log->data; if (error == NGX_HTTP_REQUEST_TIME_OUT) { ngx_log_error(NGX_LOG_INFO, r->connection->log, NGX_ETIMEDOUT, "client timed out"); r->connection->timedout = 1; ngx_http_close_request(r, error); ngx_http_close_connection(r->connection); return; } r->connection->log->handler = NULL; if (ctx->request) { switch (client_error) { case NGX_HTTP_PARSE_INVALID_HOST: ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "client %V sent invalid \"Host\" header \"%V\", URL: \"%V\"", ctx->client, &r->headers_in.host->value, &ctx->request->unparsed_uri); error = NGX_HTTP_INVALID_HOST; cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); if (cscf->restrict_host_names == NGX_HTTP_RESTRICT_HOST_CLOSE) { ngx_http_close_request(r, error); ngx_http_close_connection(r->connection); return; } break; case NGX_HTTP_PARSE_HTTP_TO_HTTPS: error = NGX_HTTP_TO_HTTPS; if (ctx->request->headers_in.referer) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "client %V sent plain HTTP request to HTTPS port, " "URL: \"%V\", referrer \"%V\"", ctx->client, &ctx->request->unparsed_uri, &ctx->request->headers_in.referer->value); } else { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "client %V sent plain HTTP request to HTTPS port, " "URL: \"%V\"", ctx->client, &ctx->request->unparsed_uri); } break; default: ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, client_header_errors[client_error - NGX_HTTP_CLIENT_ERROR], ctx->client, &ctx->request->unparsed_uri); } } else { if (error == NGX_HTTP_REQUEST_URI_TOO_LARGE) { r->request_line.len = r->header_in->end - r->request_start; r->request_line.data = r->request_start; } else { if (r->request_line.data == NULL) { for (p = r->request_start; p < r->header_in->last; p++) { if (*p == CR || *p == LF) { break; } } r->request_line.len = p - r->request_start; r->request_line.data = r->request_start; } } ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, client_header_errors[client_error - NGX_HTTP_CLIENT_ERROR], ctx->client, &r->request_line); } r->connection->log->handler = ngx_http_log_error; ngx_http_finalize_request(r, error); } static u_char *ngx_http_log_error(ngx_log_t *log, u_char *buf, size_t len) { u_char *p; ngx_http_log_ctx_t *ctx; p = buf; ctx = log->data; if (log->action) { p = ngx_snprintf(p, len, " while %s", log->action); len -= p - buf; } p = ngx_snprintf(p, len, ", client: %V", ctx->client); if (ctx->request == NULL) { return p; } len -= p - buf; p = ngx_snprintf(p, len, ", URL: \"%V\"", &ctx->request->unparsed_uri); if (ctx->request->headers_in.referer == NULL) { return p; } len -= p - buf; return ngx_snprintf(p, len, ", referrer: \"%V\"", &ctx->request->headers_in.referer->value); }