Mercurial > hg > nginx-quic
view src/http/ngx_http_event.c @ 133:b27548f540ad
nginx-0.0.1-2003-09-24-23:51:12 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 24 Sep 2003 19:51:12 +0000 |
parents | cd54bcbaf3b5 |
children | e29909bd9b8a |
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#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); 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 void ngx_http_writer(ngx_event_t *ev); static void ngx_http_block_read(ngx_event_t *ev); static void ngx_http_read_discarded_body_event(ngx_event_t *rev); static int 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_empty_handler(ngx_event_t *wev); static void ngx_http_header_parse_error(ngx_http_request_t *r, int parse_err); static size_t ngx_http_log_error(void *data, char *buf, size_t len); /* NGX_HTTP_PARSE_ ... errors */ static char *header_errors[] = { "client %s sent invalid method", "client %s sent invalid request", "client %s sent too long URI", "client %s sent invalid method in HTTP/0.9 request", "client %s sent invalid header, URL: %s", "client %s sent too long header line, URL: %s", "client %s sent HTTP/1.1 request without \"Host\" header, URL: %s", "client %s sent invalid \"Content-Length\" header, URL: %s" }; static ngx_http_header_t 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("Content-Length"), offsetof(ngx_http_headers_in_t, content_length) }, { 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 { ngx_string("User-Agent"), offsetof(ngx_http_headers_in_t, user_agent) }, { ngx_null_string, 0 } }; void ngx_http_init_connection(ngx_connection_t *c) { int event; ngx_event_t *rev; ngx_http_log_ctx_t *lctx; c->addr_text.data = ngx_palloc(c->pool, c->listening->addr_text_max_len); if (c->addr_text.data == NULL) { ngx_http_close_connection(c); return; } c->addr_text.len = ngx_sock_ntop(c->listening->family, c->sockaddr, c->addr_text.data, c->listening->addr_text_max_len); if (c->addr_text.len == 0) { ngx_http_close_connection(c); return; } lctx = ngx_pcalloc(c->pool, sizeof(ngx_http_log_ctx_t)); if (lctx == NULL) { ngx_http_close_connection(c); return; } lctx->client = c->addr_text.data; lctx->action = "reading client request line"; c->log->data = lctx; c->log->handler = ngx_http_log_error; rev = c->read; rev->event_handler = ngx_http_init_request; if (rev->ready) { /* deferred accept */ ngx_http_init_request(rev); return; } ngx_add_timer(rev, c->listening->post_accept_timeout); rev->timer_set = 1; if (ngx_event_flags & (NGX_HAVE_AIO_EVENT|NGX_HAVE_EDGE_EVENT)) { /* aio, iocp, epoll */ ngx_http_init_request(rev); return; } if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) { /* kqueue */ event = NGX_CLEAR_EVENT; } else { /* select, poll, /dev/poll */ event = NGX_LEVEL_EVENT; } if (ngx_add_event(rev, NGX_READ_EVENT, event) == NGX_ERROR) { ngx_http_close_connection(c); } } static void ngx_http_init_request(ngx_event_t *rev) { int i; socklen_t len; struct sockaddr_in addr_in; 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_server_name_t *server_name; ngx_http_core_srv_conf_t *cscf; ngx_http_core_loc_conf_t *clcf; c = rev->data; r = ngx_pcalloc(c->pool, sizeof(ngx_http_request_t)); if (r == NULL) { ngx_http_close_connection(c); return; } /* find the server configuration for the address:port */ /* AF_INET only */ in_port = c->servers; in_addr = in_port->addrs.elts; ngx_log_debug(rev->log, "IN: %08x" _ in_port); r->port = in_port->port; r->port_name = &in_port->port_name; i = 0; if (in_port->addrs.nelts > 1) { /* * there're the several addresses on this port and one of them * is "*:port" so getsockname() is needed to determine * the server address. * AcceptEx() already gave this address. */ #if (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 *) &addr_in, &len) == -1) { ngx_log_error(NGX_LOG_CRIT, rev->log, ngx_socket_errno, "getsockname() failed"); ngx_http_close_connection(c); return; } #if (WIN32) } #endif r->in_addr = addr_in.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].names; /* 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; 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; c->log->log_level = clcf->err_log->log_level; if (c->buffer == NULL) { c->buffer = ngx_create_temp_hunk(c->pool, cscf->client_header_buffer_size, 0, 0); if (c->buffer == NULL) { ngx_http_close_connection(c); return; } } r->pool = ngx_create_pool(cscf->request_pool_size, c->log); if (r->pool == NULL) { ngx_http_close_connection(c); return; } r->headers_out.headers = ngx_create_table(r->pool, 10); if (r->headers_out.headers == NULL) { 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->sent = 0; c->data = r; r->connection = c; r->pipeline = c->pipeline; r->header_in = c->buffer; r->file.fd = NGX_INVALID_FILE; r->headers_in.content_length_n = -1; r->headers_out.content_length = -1; r->headers_out.last_modified_time = -1; rev->event_handler = ngx_http_process_request_line; ngx_http_process_request_line(rev); } static void ngx_http_process_request_line(ngx_event_t *rev) { int rc, offset; ssize_t n; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_log_ctx_t *lctx; ngx_http_core_srv_conf_t *cscf; c = rev->data; r = c->data; ngx_log_debug(rev->log, "http process request line"); if (rev->timedout) { ngx_http_close_request(r, NGX_HTTP_REQUEST_TIME_OUT); ngx_http_close_connection(c); return; } n = ngx_http_read_request_header(r); if (n == NGX_AGAIN || n == NGX_ERROR) { return; } rc = ngx_parse_http_request_line(r); if (rc == NGX_OK) { /* the request line has been parsed successfully */ /* STUB: we need to handle such URIs */ if (r->complex_uri || r->unusual_uri) { r->request_line.len = r->request_end - r->request_start; r->request_line.data = r->request_start; r->request_line.data[r->request_line.len] = '\0'; ngx_http_header_parse_error(r, NGX_HTTP_PARSE_INVALID_REQUEST); ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST); return; } cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); if (r->http_version >= NGX_HTTP_VERSION_10 && cscf->large_client_header == 0 && r->header_in->pos == r->header_in->end) { /* no space for "\r\n" at the end of the header */ ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_URI); ngx_http_finalize_request(r, NGX_HTTP_REQUEST_URI_TOO_LARGE); return; } /* copy URI */ if (r->args_start) { r->uri.len = r->args_start - 1 - r->uri_start; } else { r->uri.len = r->uri_end - r->uri_start; } r->uri.data = ngx_palloc(r->pool, r->uri.len + 1); if (r->uri.data == NULL) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } ngx_cpystrn(r->uri.data, r->uri_start, r->uri.len + 1); #if 1 /* THINK: needed to log url on errors in proxy only ? */ /* copy unparsed URI */ r->unparsed_uri.len = r->uri_end - r->uri_start; r->unparsed_uri.data = ngx_palloc(r->pool, r->unparsed_uri.len + 1); if (r->unparsed_uri.data == NULL) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } ngx_cpystrn(r->unparsed_uri.data, r->uri_start, r->unparsed_uri.len + 1); #endif r->request_line.len = r->request_end - r->request_start; /* if the large client headers are enabled then we need to copy a request line */ if (cscf->large_client_header) { r->request_line.data = ngx_palloc(r->pool, r->request_line.len + 1); if (r->request_line.data == NULL) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } ngx_cpystrn(r->request_line.data, r->request_start, r->request_line.len + 1); } else { r->request_line.data = r->request_start; r->request_line.data[r->request_line.len] = '\0'; } /* copy URI extention if it exists */ 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 = ngx_palloc(r->pool, r->exten.len + 1); if (r->exten.data == NULL) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } ngx_cpystrn(r->exten.data, r->uri_ext, r->exten.len + 1); } /* copy URI arguments if they exist */ if (r->args_start && r->uri_end > r->args_start) { r->args.len = r->uri_end - r->args_start; r->args.data = ngx_palloc(r->pool, r->args.len + 1); if (r->args.data == NULL) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } ngx_cpystrn(r->args.data, r->args_start, r->args.len + 1); } #if 1 /* DEBUG */ if (r->exten.data == NULL) { r->exten.data = ""; } if (r->args.data == NULL) { r->args.data = ""; } ngx_log_debug(c->log, "HTTP: %d, %d, '%s', '%s', '%s'" _ r->method _ r->http_version _ r->uri.data _ r->exten.data _ r->args.data); if (r->exten.data[0] == '\0') { r->exten.data = NULL; } if (r->args.data[0] == '\0') { r->args.data = NULL; } #endif if (r->http_version < NGX_HTTP_VERSION_10) { rev->event_handler = ngx_http_block_read; ngx_http_handler(r); return; } lctx = c->log->data; lctx->action = "reading client request headers"; lctx->url = r->unparsed_uri.data; r->headers_in.headers = ngx_create_table(r->pool, 10); if (cscf->large_client_header && r->header_in->pos == r->header_in->last) { r->header_in->pos = r->header_in->last = r->header_in->start; } 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_header_parse_error(r, rc); ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST); return; } /* NGX_AGAIN: a request line parsing is still not complete */ if (r->header_in->last == r->header_in->end) { /* If it's a pipelined request and a request line is not complete then we need to copy it to the start of the r->header_in hunk. We need to copy it here only if the large client headers are enabled otherwise a request line had been already copied to the start of the r->header_in hunk in ngx_http_set_keepalive() */ cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); if (cscf->large_client_header) { offset = r->request_start - r->header_in->start; if (offset == 0) { ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_URI); ngx_http_finalize_request(r, NGX_HTTP_REQUEST_URI_TOO_LARGE); return; } ngx_memcpy(r->header_in->start, r->request_start, r->header_in->last - r->request_start); r->header_in->pos -= offset; r->header_in->last -= offset; r->request_start = r->header_in->start; r->request_end -= offset; r->uri_start -= offset; r->uri_end -= offset; if (r->uri_ext) { r->uri_ext -= offset; } if (r->args_start) { r->args_start -= offset; } } else { ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_URI); ngx_http_finalize_request(r, NGX_HTTP_REQUEST_URI_TOO_LARGE); } } return; } static void ngx_http_process_request_headers(ngx_event_t *rev) { int rc, i, offset; size_t len; ssize_t n; ngx_table_elt_t *h; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_server_name_t *name; ngx_http_core_srv_conf_t *cscf; ngx_http_core_loc_conf_t *clcf; c = rev->data; r = c->data; ngx_log_debug(rev->log, "http process request header line"); if (rev->timedout) { ngx_http_close_request(r, NGX_HTTP_REQUEST_TIME_OUT); ngx_http_close_connection(c); return; } cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); 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_parse_http_header_line(r, r->header_in); if (rc == NGX_OK) { /* a header line has been parsed successfully */ h = ngx_push_table(r->headers_in.headers); if (h == NULL) { 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->value.len = r->header_end - r->header_start; /* if the large client headers are enabled then we need to copy the header name and value */ if (cscf->large_client_header) { h->key.data = ngx_palloc(r->pool, h->key.len + 1 + h->value.len + 1); if (h->key.data == NULL) { ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_http_close_connection(c); return; } h->value.data = h->key.data + h->key.len + 1; ngx_cpystrn(h->key.data, r->header_name_start, h->key.len + 1); ngx_cpystrn(h->value.data, r->header_start, h->value.len + 1); } else { h->key.data = r->header_name_start; h->key.data[h->key.len] = '\0'; h->value.data = r->header_start; h->value.data[h->value.len] = '\0'; } for (i = 0; headers_in[i].name.len != 0; i++) { if (headers_in[i].name.len != h->key.len) { continue; } if (ngx_strcasecmp(headers_in[i].name.data, h->key.data) == 0) { *((ngx_table_elt_t **) ((char *) &r->headers_in + headers_in[i].offset)) = h; } } ngx_log_debug(r->connection->log, "HTTP header: '%s: %s'" _ h->key.data _ h->value.data); if (cscf->large_client_header && r->header_in->pos == r->header_in->last) { r->header_in->pos = r->header_in->last = r->header_in->start; } continue; } else if (rc == NGX_HTTP_PARSE_HEADER_DONE) { /* a whole header has been parsed successfully */ ngx_log_debug(r->connection->log, "HTTP header done"); if (r->headers_in.host) { for (len = 0; len < r->headers_in.host->value.len; len++) { if (r->headers_in.host->value.data[len] == ':') { break; } } r->headers_in.host_name_len = len; /* find the name based server configuration */ name = r->virtual_names->elts; for (i = 0; i < r->virtual_names->nelts; i++) { if (r->headers_in.host_name_len != name[i].name.len) { continue; } if (ngx_strncasecmp(r->headers_in.host->value.data, name[i].name.data, r->headers_in.host_name_len) == 0) { 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); c->log->file = clcf->err_log->file; c->log->log_level = clcf->err_log->log_level; break; } } } else { if (r->http_version > NGX_HTTP_VERSION_10) { ngx_http_header_parse_error(r, NGX_HTTP_PARSE_NO_HOST_HEADER); ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST); return; } 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) { ngx_http_header_parse_error(r, NGX_HTTP_PARSE_INVALID_CL_HEADER); ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST); return; } } 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 */ ngx_http_header_parse_error(r, rc); ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST); return; } /* NGX_AGAIN: a header line parsing is still not complete */ if (r->header_in->last == r->header_in->end) { /* if the large client headers are enabled then we need to compact r->header_in hunk */ if (cscf->large_client_header) { offset = r->header_name_start - r->header_in->start; if (offset == 0) { ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_HEADER); ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST); return; } ngx_memcpy(r->header_in->start, r->header_name_start, r->header_in->last - r->header_name_start); r->header_in->last -= offset; r->header_in->pos -= offset; r->header_name_start = r->header_in->start; r->header_name_end -= offset; r->header_start -= offset; r->header_end -= offset; } else { ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_HEADER); ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST); return; } } } } static ssize_t ngx_http_read_request_header(ngx_http_request_t *r) { int event; 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) { rev->ready = 0; return n; } n = ngx_recv(r->connection, r->header_in->last, r->header_in->end - r->header_in->last); if (n == NGX_AGAIN) { if (!r->header_timeout_set) { if (rev->timer_set) { ngx_del_timer(rev); } else { rev->timer_set = 1; } 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 (!rev->active) { if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) { /* kqueue */ event = NGX_CLEAR_EVENT; } else { /* select, poll, /dev/poll */ event = NGX_LEVEL_EVENT; } if (ngx_add_event(rev, NGX_READ_EVENT, event) == 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; } void ngx_http_finalize_request(ngx_http_request_t *r, int error) { int rc; ngx_event_t *rev, *wev; rc = error; if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { rev = r->connection->read; if (rev->timer_set) { ngx_del_timer(rev); rev->timer_set = 0; } wev = r->connection->write; if (wev->timer_set) { ngx_del_timer(wev); wev->timer_set = 0; } rc = ngx_http_special_response_handler(r, rc); if (rc == NGX_AGAIN) { return; } if (rc == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); return; } } else if (rc == NGX_ERROR) { r->keepalive = 0; r->lingering_close = 0; } rev = r->connection->read; if (rev->timer_set) { ngx_del_timer(rev); rev->timer_set = 0; } wev = r->connection->write; if (wev->timer_set) { ngx_del_timer(wev); wev->timer_set = 0; } if (r->keepalive != 0) { ngx_http_set_keepalive(r); } else if (r->lingering_close) { ngx_http_set_lingering_close(r); } else { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); } } void ngx_http_set_write_handler(ngx_http_request_t *r) { int event; ngx_event_t *wev; ngx_http_core_loc_conf_t *clcf; wev = r->connection->write; wev->event_handler = ngx_http_writer; if (wev->delayed && wev->ready) { return; } clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r, ngx_http_core_module); ngx_add_timer(wev, clcf->send_timeout); wev->timer_set = 1; if (ngx_event_flags & (NGX_HAVE_AIO_EVENT|NGX_HAVE_EDGE_EVENT)) { /* aio, iocp, epoll */ return; } #if (HAVE_LOWAT_EVENT) /* kqueue's NOTE_LOWAT */ if (ngx_event_flags & NGX_HAVE_LOWAT_EVENT) { wev->lowat = clcf->send_lowat; } #endif if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) { /* kqueue */ event = NGX_CLEAR_EVENT; } else { /* select, poll, /dev/poll */ event = NGX_LEVEL_EVENT; } if (ngx_add_event(wev, NGX_WRITE_EVENT, event) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); } } static void ngx_http_writer(ngx_event_t *wev) { int rc; ngx_event_t *rev; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_core_loc_conf_t *clcf; c = wev->data; r = c->data; rc = ngx_http_output_filter(r, NULL); ngx_log_debug(c->log, "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->timer_set) { ngx_del_timer(wev); } else { wev->timer_set = 1; } ngx_add_timer(wev, clcf->send_timeout); return; } if (rc == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } /* rc == NGX_OK */ ngx_log_debug(c->log, "http writer done"); rev = r->connection->read; if (rev->timer_set) { ngx_del_timer(rev); rev->timer_set = 0; } if (wev->timer_set) { ngx_del_timer(wev); wev->timer_set = 0; } if (r->keepalive != 0) { ngx_http_set_keepalive(r); } else if (r->lingering_close) { ngx_http_set_lingering_close(r); } else { ngx_http_close_request(r, 0); ngx_http_close_connection(r->connection); } } static void ngx_http_block_read(ngx_event_t *rev) { ngx_connection_t *c; ngx_http_request_t *r; ngx_log_debug(rev->log, "http read blocked"); /* aio does not call this handler */ if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { /* select, poll, /dev/poll */ rev->blocked = 1; if (ngx_del_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { c = (ngx_connection_t *) rev->data; r = (ngx_http_request_t *) c->data; ngx_http_close_request(r, 0); ngx_http_close_connection(c); } } /* kqueue, epoll */ return; } int ngx_http_discard_body(ngx_http_request_t *r) { ssize_t size; ngx_event_t *rev; rev = r->connection->read; ngx_log_debug(rev->log, "set discard body"); if (rev->timer_set) { ngx_del_timer(rev); rev->timer_set = 0; } if (r->headers_in.content_length_n > 0) { 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 (rev->blocked) { if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) == NGX_ERROR) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } } rev->blocked = 0; return ngx_http_read_discarded_body(r); } } return NGX_OK; } static void ngx_http_read_discarded_body_event(ngx_event_t *rev) { int 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_OK) { ngx_http_close_request(r, rc); ngx_http_close_connection(c); } } static int ngx_http_read_discarded_body(ngx_http_request_t *r) { ssize_t size, n; ngx_http_core_loc_conf_t *clcf; ngx_log_debug(r->connection->log, "http read discarded body"); clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (r->discarded_buffer == NULL) { r->discarded_buffer = ngx_palloc(r->pool, clcf->discarded_buffer_size); if (r->discarded_buffer == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } } size = r->headers_in.content_length_n; if (size > clcf->discarded_buffer_size) { size = clcf->discarded_buffer_size; } n = ngx_recv(r->connection, r->discarded_buffer, size); if (n == NGX_ERROR) { return NGX_HTTP_BAD_REQUEST; } if (n == NGX_AGAIN) { return NGX_OK; } r->headers_in.content_length_n -= n; return NGX_OK; } static void ngx_http_set_keepalive(ngx_http_request_t *r) { int len, blocked; ngx_hunk_t *h; ngx_event_t *rev, *wev; ngx_connection_t *c; ngx_http_log_ctx_t *ctx; ngx_http_core_srv_conf_t *cscf; ngx_http_core_loc_conf_t *clcf; c = r->connection; rev = c->read; ngx_log_debug(c->log, "set http keepalive handler"); ctx = (ngx_http_log_ctx_t *) c->log->data; ctx->action = "closing request"; ngx_http_close_request(r, 0); if (rev->timer_set) { ngx_del_timer(rev); } else { rev->timer_set = 1; } clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); ngx_add_timer(rev, clcf->keepalive_timeout); if (rev->blocked && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) { if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) == NGX_ERROR) { ngx_http_close_connection(c); return; } blocked = 1; rev->blocked = 0; } else { blocked = 0; } h = c->buffer; /* pipelined request */ if (h->pos < h->last) { /* We do not know here whether a pipelined request is complete so if the large client headers are not enabled we need to copy the data to the start of c->buffer. This copy should be rare because clients that support pipelined requests (Mozilla 1.x, Opera 6.x) are still rare */ cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module); if (!cscf->large_client_header) { len = h->last - h->pos; ngx_memcpy(h->start, h->pos, len); h->pos = h->start; h->last = h->start + len; } ngx_log_debug(c->log, "pipelined request"); c->pipeline = 1; ctx->action = "reading client pipelined request line"; ngx_http_init_request(rev); return; } c->pipeline = 0; h->pos = h->last = h->start; rev->event_handler = ngx_http_keepalive_handler; wev = c->write; if (wev->active) { 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; } } else if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) == 0) { wev->event_handler = ngx_http_empty_handler; } } ctx->action = "keepalive"; if (c->tcp_nopush) { 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_close_connection(c); return; } c->tcp_nopush = 0; } if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) || blocked) { ngx_http_keepalive_handler(rev); } } static void ngx_http_keepalive_handler(ngx_event_t *rev) { ssize_t n; ngx_connection_t *c; ngx_http_log_ctx_t *lctx; c = (ngx_connection_t *) rev->data; ngx_log_debug(c->log, "http keepalive handler"); if (rev->timedout) { ngx_http_close_connection(c); return; } /* MSIE closes a keepalive connection with RST flag so we ignore ECONNRESET here */ rev->ignore_econnreset = 1; ngx_set_socket_errno(0); n = ngx_recv(c, c->buffer->last, c->buffer->end - c->buffer->last); rev->ignore_econnreset = 0; if (n == NGX_AGAIN) { return; } if (n == NGX_ERROR) { ngx_http_close_connection(c); return; } lctx = (ngx_http_log_ctx_t *) rev->log->data; rev->log->handler = NULL; if (n == 0) { ngx_log_error(NGX_LOG_INFO, c->log, ngx_socket_errno, "client %s closed keepalive connection", lctx->client); ngx_http_close_connection(c); return; } c->buffer->last += n; rev->log->handler = ngx_http_log_error; lctx->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; ngx_connection_t *c; ngx_http_core_loc_conf_t *clcf; c = r->connection; rev = c->read; clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); r->lingering_time = ngx_time() + clcf->lingering_time / 1000; rev->event_handler = ngx_http_lingering_close_handler; if (rev->timer_set) { ngx_del_timer(rev); } else { rev->timer_set = 1; } ngx_add_timer(rev, clcf->lingering_timeout); if (rev->blocked && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) { if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } rev->blocked = 0; } if (c->write->active) { if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { if (ngx_del_event(c->write, NGX_WRITE_EVENT, 0) == NGX_ERROR) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } } else if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) == 0) { c->write->event_handler = ngx_http_empty_handler; } } if (ngx_shutdown_socket(c->fd, NGX_WRITE_SHUTDOWN) == -1) { ngx_log_error(NGX_LOG_CRIT, c->log, ngx_socket_errno, ngx_shutdown_socket_n " failed"); ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } if (rev->ready || (ngx_event_flags & NGX_HAVE_AIO_EVENT)) { 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; c = rev->data; r = c->data; ngx_log_debug(c->log, "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; } clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (r->discarded_buffer == NULL) { /* TODO: r->header_in->start (if large headers are enabled) or the end of parsed header (otherwise) instead of r->header_in->last */ if (r->header_in->end - r->header_in->last >= clcf->discarded_buffer_size) { r->discarded_buffer = r->header_in->last; } else { r->discarded_buffer = ngx_palloc(c->pool, clcf->discarded_buffer_size); if (r->discarded_buffer) { ngx_http_close_request(r, 0); ngx_http_close_connection(c); return; } } } do { n = ngx_recv(c, r->discarded_buffer, clcf->discarded_buffer_size); ngx_log_debug(c->log, "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); timer *= 1000; if (timer > clcf->lingering_timeout) { timer = clcf->lingering_timeout; } if (rev->timer_set) { ngx_del_timer(rev); } else { rev->timer_set = 1; } ngx_add_timer(rev, timer); return; } static void ngx_http_empty_handler(ngx_event_t *wev) { ngx_log_debug(wev->log, "http empty handler"); return; } void ngx_http_close_request(ngx_http_request_t *r, int error) { ngx_http_log_ctx_t *ctx; ngx_log_debug(r->connection->log, "close http request"); if (r->pool == NULL) { ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, "http request already closed"); return; } if (error) { r->headers_out.status = error; } ngx_http_log_handler(r); if (r->file.fd != NGX_INVALID_FILE) { if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno, ngx_close_file_n " \"%s\" failed", r->file.name.data); } } /* ctx->url was allocated from r->pool */ ctx = (ngx_http_log_ctx_t *) r->connection->log->data; ctx->url = NULL; ngx_destroy_pool(r->pool); } void ngx_http_close_connection(ngx_connection_t *c) { ngx_log_debug(c->log, "close connection: %d" _ c->fd); if (c->pool == NULL) { ngx_log_error(NGX_LOG_ALERT, c->log, 0, "connection already closed"); return; } if (c->read->timer_set) { ngx_del_timer(c->read); c->read->timer_set = 0; } if (c->write->timer_set) { ngx_del_timer(c->write); c->write->timer_set = 0; } if (ngx_del_conn) { ngx_del_conn(c); } else { if (c->read->active) { ngx_del_event(c->read, NGX_READ_EVENT, NGX_CLOSE_EVENT); } if (c->write->active) { ngx_del_event(c->write, NGX_WRITE_EVENT, NGX_CLOSE_EVENT); } } if (ngx_close_socket(c->fd) == -1) { ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno, ngx_close_socket_n " failed"); } c->fd = -1; ngx_destroy_pool(c->pool); } static void ngx_http_header_parse_error(ngx_http_request_t *r, int parse_err) { ngx_http_log_ctx_t *ctx; ctx = r->connection->log->data; r->connection->log->handler = NULL; if (ctx->url) { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, header_errors[parse_err - NGX_HTTP_PARSE_INVALID_METHOD], ctx->client, ctx->url); } else { ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, header_errors[parse_err - NGX_HTTP_PARSE_INVALID_METHOD], ctx->client); } r->connection->log->handler = ngx_http_log_error; } static size_t ngx_http_log_error(void *data, char *buf, size_t len) { ngx_http_log_ctx_t *ctx = (ngx_http_log_ctx_t *) data; if (ctx->action && ctx->url) { return ngx_snprintf(buf, len, " while %s, client: %s, URL: %s", ctx->action, ctx->client, ctx->url); } else if (ctx->action == NULL && ctx->url) { return ngx_snprintf(buf, len, ", client: %s, URL: %s", ctx->client, ctx->url); } else { return ngx_snprintf(buf, len, " while %s, client: %s", ctx->action, ctx->client); } }