#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int ngx_http_init_request(ngx_event_t *ev); static int ngx_http_process_request(ngx_event_t *ev); static int ngx_http_process_request_line(ngx_http_request_t *r); static int ngx_http_process_request_headers(ngx_http_request_t *r); static int ngx_http_process_request_header_line(ngx_http_request_t *r); static int ngx_http_request_handler(ngx_http_request_t *r, int error); static int ngx_http_writer(ngx_event_t *ev); static int ngx_http_block_read(ngx_event_t *ev); static int ngx_http_read_discarded_body(ngx_event_t *ev); static int ngx_http_set_keepalive(ngx_http_request_t *r); static int ngx_http_keepalive_handler(ngx_event_t *ev); static int ngx_http_set_lingering_close(ngx_http_request_t *r); static int ngx_http_lingering_close_handler(ngx_event_t *ev); static int ngx_http_close_connection(ngx_event_t *ev); 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); static char *header_errors[] = { "client %s sent invalid method", "client %s sent invalid request", "client %s sent too long URI", "client %s sent HEAD 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" }; 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("User-Agent"), offsetof(ngx_http_headers_in_t, user_agent) }, { ngx_null_string, 0 } }; int ngx_http_init_connection(ngx_connection_t *c) { ngx_event_t *rev; ngx_http_log_ctx_t *ctx; rev = c->read; rev->event_handler = ngx_http_init_request; rev->close_handler = ngx_http_close_connection; c->write->close_handler = ngx_http_close_connection; ngx_test_null(c->addr_text.data, ngx_palloc(c->pool, c->addr_text_max_len), NGX_ERROR); c->addr_text.len = ngx_sock_ntop(c->family, c->sockaddr, c->addr_text.data, c->addr_text_max_len); if (c->addr_text.len == 0) { return NGX_ERROR; } ngx_test_null(ctx, ngx_pcalloc(c->pool, sizeof(ngx_http_log_ctx_t)), NGX_ERROR); ctx->client = c->addr_text.data; ctx->action = "reading client request line"; c->log->data = ctx; c->log->handler = ngx_http_log_error; #if (HAVE_DEFERRED_ACCEPT) if (rev->ready) { return ngx_http_init_request(rev); } #endif ngx_add_timer(rev, c->post_accept_timeout); rev->timer_set = 1; #if (USE_KQUEUE) return ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT); #else /* kqueue */ if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) { return ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT); } /* aio, iocp, epoll */ if (ngx_event_flags & (NGX_HAVE_AIO_EVENT|NGX_HAVE_EDGE_EVENT)) { return ngx_http_init_request(rev); } /* select, poll, /dev/poll */ return ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT); #endif /* USE_KQUEUE */ } static int ngx_http_init_request(ngx_event_t *rev) { ngx_connection_t *c; ngx_http_request_t *r; ngx_http_conf_ctx_t *ctx; c = (ngx_connection_t *) rev->data; c->sent = 0; ngx_test_null(r, ngx_pcalloc(c->pool, sizeof(ngx_http_request_t)), NGX_ERROR); c->data = r; r->connection = c; r->file.fd = NGX_INVALID_FILE; if (c->buffer == NULL) { ngx_test_null(c->buffer, ngx_create_temp_hunk(c->pool, ngx_http_client_header_buffer_size, 0, 0), NGX_ERROR); } else { r->header_read = 1; } r->pipeline = c->pipeline; r->header_in = c->buffer; ngx_test_null(r->pool, ngx_create_pool(ngx_http_request_pool_size, c->log), NGX_ERROR); ngx_test_null(r->ctx, ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module), ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR)); ctx = (ngx_http_conf_ctx_t *) c->ctx; r->srv_conf = ctx->srv_conf; r->loc_conf = ctx->loc_conf; r->headers_out.headers = ngx_create_table(r->pool, 10); r->headers_out.content_length = -1; r->headers_out.last_modified_time = -1; rev->event_handler = ngx_http_process_request; r->state_handler = ngx_http_process_request_line; return ngx_http_process_request(rev); } static int ngx_http_process_request(ngx_event_t *rev) { int n, rc; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_log_ctx_t *lcx; c = (ngx_connection_t *) rev->data; r = (ngx_http_request_t *) c->data; ngx_log_debug(c->log, "http process request"); if (rev->timedout) { return ngx_http_close_request(r, NGX_HTTP_REQUEST_TIME_OUT); } do { if (r->header_read) { r->header_read = 0; ngx_log_debug(c->log, "http preread %d" _ r->header_in->last - r->header_in->pos); } else { n = ngx_event_recv(c, 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; } ngx_add_timer(rev, ngx_http_client_header_timeout); r->header_timeout_set = 1; } return NGX_AGAIN; } if (n == NGX_ERROR) { return ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST); } ngx_log_debug(c->log, "http read %d" _ n); if (n == 0) { ngx_log_error(NGX_LOG_INFO, c->log, 0, "client closed prematurely connection"); return ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST); } r->header_in->last += n; } /* the state handlers are called in the following order: ngx_http_process_request_line(r) ngx_http_process_request_headers(r) */ do { rc = r->state_handler(r); } while (rc == NGX_AGAIN && r->header_in->pos < r->header_in->last); } while (rc == NGX_AGAIN && (rev->ready || ngx_event_flags & NGX_HAVE_AIO_EVENT)); if (rc >= NGX_OK) { /* HTTP header done */ rev->event_handler = ngx_http_block_read; if (rc != NGX_OK) { return ngx_http_finalize_request(r, rc); } lcx = r->connection->log->data; lcx->action = "processing client request"; rc = ngx_http_handler(r); /* a handler does its own processing */ if (rc == NGX_DONE) { return rc; } if (rc == NGX_ERROR) { rc = NGX_HTTP_INTERNAL_SERVER_ERROR; } return ngx_http_finalize_request(r, rc); } /* NGX_AGAIN */ if (!r->header_timeout_set) { if (rev->timer_set) { ngx_del_timer(rev); } else { rev->timer_set = 1; } ngx_add_timer(rev, ngx_http_client_header_timeout); r->header_timeout_set = 1; } return rc; } static int ngx_http_process_request_line(ngx_http_request_t *r) { int rc, offset; ngx_connection_t *c; ngx_http_log_ctx_t *lcx; rc = ngx_read_http_request_line(r); c = r->connection; /* a request line has been parsed successfully */ if (rc == NGX_OK) { if (r->http_version >= NGX_HTTP_VERSION_10 && ngx_http_large_client_header == 0 && r->header_in->pos == r->header_in->end) { ngx_http_header_parse_error(r, NGX_HTTP_PARSE_TOO_LONG_URI); return NGX_HTTP_REQUEST_URI_TOO_LARGE; } /* 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; } ngx_test_null(r->uri.data, ngx_palloc(r->pool, r->uri.len + 1), NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_cpystrn(r->uri.data, r->uri_start, r->uri.len + 1); 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 (ngx_http_large_client_header) { ngx_test_null(r->request_line.data, ngx_palloc(r->pool, r->request_line.len + 1), NGX_HTTP_INTERNAL_SERVER_ERROR); 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; } ngx_test_null(r->exten.data, ngx_palloc(r->pool, r->exten.len + 1), NGX_HTTP_INTERNAL_SERVER_ERROR); 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; ngx_test_null(r->args.data, ngx_palloc(r->pool, r->args.len + 1), NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_cpystrn(r->args.data, r->args_start, r->args.len + 1); } #if 1 if (r->exten.data == NULL) { r->exten.data = ""; } if (r->args.data == NULL) { r->args.data = ""; } ngx_log_debug(r->connection->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 lcx = r->connection->log->data; if (ngx_http_url_in_error_log) { ngx_test_null(lcx->url, ngx_palloc(r->pool, r->uri_end - r->uri_start + 1), NGX_HTTP_INTERNAL_SERVER_ERROR); ngx_cpystrn(lcx->url, r->uri_start, r->uri_end - r->uri_start + 1); } /* if we need to parse the headers then return NGX_AGAIN becuase of HTTP/0.9 has no headers so return NGX_OK */ if (r->http_version == NGX_HTTP_VERSION_9) { r->state_handler = NULL; return NGX_OK; } r->headers_in.headers = ngx_create_table(r->pool, 10); r->state_handler = ngx_http_process_request_headers; lcx->action = "reading client request headers"; if (ngx_http_large_client_header && r->header_in->pos == r->header_in->last) { r->header_in->pos = r->header_in->last = r->header_in->start; } return NGX_AGAIN; /* there was error while a request line parsing */ } else if (rc != NGX_AGAIN) { ngx_http_header_parse_error(r, rc); return NGX_HTTP_BAD_REQUEST; } /* 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 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 r->header_in hunk in ngx_http_set_keepalive() */ if (ngx_http_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); return NGX_HTTP_REQUEST_URI_TOO_LARGE; } 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); return NGX_HTTP_REQUEST_URI_TOO_LARGE; } } return NGX_AGAIN; } static int ngx_http_process_request_headers(ngx_http_request_t *r) { int rc, offset; size_t len; ngx_http_log_ctx_t *ctx; for ( ;; ) { rc = ngx_read_http_header_line(r, r->header_in); /* a header line has been parsed successfully */ if (rc == NGX_OK) { if (ngx_http_process_request_header_line(r) == NGX_ERROR) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } if (ngx_http_large_client_header && r->header_in->pos == r->header_in->last) { r->header_in->pos = r->header_in->last = r->header_in->start; } return NGX_AGAIN; /* a whole header has been parsed successfully */ } else if (rc == NGX_HTTP_PARSE_HEADER_DONE) { 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; } else { if (r->http_version > NGX_HTTP_VERSION_10) { ngx_http_header_parse_error(r, NGX_HTTP_PARSE_NO_HOST_HEADER); return NGX_HTTP_BAD_REQUEST; } r->headers_in.host_name_len = 0; } r->state_handler = NULL; return NGX_OK; /* there was error while a header line parsing */ } else if (rc != NGX_AGAIN) { ngx_http_header_parse_error(r, rc); return NGX_HTTP_BAD_REQUEST; } /* 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 (ngx_http_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); return NGX_HTTP_BAD_REQUEST; } 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); return NGX_HTTP_BAD_REQUEST; } } return NGX_AGAIN; } } static int ngx_http_process_request_header_line(ngx_http_request_t *r) { int i; ngx_table_elt_t *h; ngx_test_null(h, ngx_push_table(r->headers_in.headers), NGX_ERROR); 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 (ngx_http_large_client_header) { ngx_test_null(h->key.data, ngx_palloc(r->pool, h->key.len + 1), NGX_ERROR); ngx_test_null(h->value.data, ngx_palloc(r->pool, h->value.len + 1), NGX_ERROR); 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); return NGX_OK; } int ngx_http_finalize_request(ngx_http_request_t *r, int error) { int rc, event; ngx_msec_t timeout; ngx_event_t *rev, *wev; ngx_http_core_loc_conf_t *lcf; rc = error; if (rc >= NGX_HTTP_SPECIAL_RESPONSE) { rev = r->connection->read; if (rev->timer_set) { ngx_del_timer(rev); } else { rev->timer_set = 1; } rc = ngx_http_special_response_handler(r, rc); } /* a handler has done its work completely */ if (rc == NGX_OK) { if (r->keepalive != 0) { return ngx_http_set_keepalive(r); } if (r->lingering_close) { return ngx_http_set_lingering_close(r); } return ngx_http_close_request(r, 0); } /* NGX_AGAIN: a handler has done its work but the transfer is still not completed */ lcf = (ngx_http_core_loc_conf_t *) ngx_http_get_module_loc_conf(r->main ? r->main : r, ngx_http_core_module_ctx); wev = r->connection->write; wev->event_handler = ngx_http_writer; wev->timer_set = 1; ngx_add_timer(wev, lcf->send_timeout); #if (USE_KQUEUE) #if (HAVE_LOWAT_EVENT) /* kqueue's NOTE_LOWAT */ wev->lowat = lcf->send_lowat; #endif if (ngx_add_event(wev, NGX_WRITE_EVENT, NGX_CLEAR_EVENT) == NGX_ERROR) { return ngx_http_close_request(r, 0); } return rc; #else /* aio, iocp, epoll */ if (ngx_event_flags & (NGX_HAVE_AIO_EVENT|NGX_HAVE_EDGE_EVENT)) { return rc; } #if (HAVE_LOWAT_EVENT) /* kqueue's NOTE_LOWAT */ if (ngx_event_flags & NGX_HAVE_LOWAT_EVENT) { wev->lowat = lcf->send_lowat; } #endif /* kqueue */ if (ngx_event_flags & NGX_HAVE_CLEAR_EVENT) { event = NGX_CLEAR_EVENT; /* select, poll, /dev/poll */ } else { event = NGX_LEVEL_EVENT; } if (ngx_add_event(wev, NGX_WRITE_EVENT, event) == NGX_ERROR) { return ngx_http_close_request(r, 0); } return rc; #endif /* USE_KQUEUE */ } static int ngx_http_writer(ngx_event_t *wev) { int rc; ngx_msec_t timeout; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_core_loc_conf_t *lcf; c = (ngx_connection_t *) wev->data; r = (ngx_http_request_t *) c->data; rc = ngx_http_output_filter(r, NULL); ngx_log_debug(c->log, "output filter in writer: %d" _ rc); if (rc == NGX_AGAIN) { lcf = (ngx_http_core_loc_conf_t *) ngx_http_get_module_loc_conf(r->main ? r->main : r, ngx_http_core_module_ctx); if (wev->timer_set) { ngx_del_timer(wev); } else { wev->timer_set = 1; } ngx_add_timer(wev, lcf->send_timeout); return rc; } if (rc == NGX_ERROR) return rc; /* rc == NGX_OK */ ngx_log_debug(c->log, "http writer done"); if (r->keepalive != 0) { return ngx_http_set_keepalive(r); } if (r->lingering_close) { return ngx_http_set_lingering_close(r); } return ngx_http_close_request(r, 0); } static int ngx_http_block_read(ngx_event_t *ev) { ngx_log_debug(ev->log, "http read blocked"); /* aio does not call this handler */ #if (USE_KQUEUE) return NGX_OK; #else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) { /* select, poll, /dev/poll */ ev->blocked = 1; return ngx_del_event(ev, NGX_READ_EVENT, 0); } else { /* kqueue, epoll */ return NGX_OK; } #endif /* USE_KQUEUE */ } /* TODO */ int ngx_http_discard_body(ngx_http_request_t *r) { ngx_event_t *ev; ev = r->connection->read; ngx_log_debug(r->connection->log, "set discard body"); if (ev->timer_set) { ngx_del_timer(ev); ev->timer_set = 0; } if (r->client_content_length) { ev->event_handler = ngx_http_read_discarded_body; /* if blocked - read */ /* else add timer */ } return NGX_OK; } /* TODO */ static int ngx_http_read_discarded_body(ngx_event_t *ev) { size_t size; ssize_t n; ngx_connection_t *c; ngx_http_request_t *r; ngx_http_core_loc_conf_t *lcf; ngx_log_debug(ev->log, "http read discarded body"); if (ev->timedout) { return NGX_ERROR; } c = (ngx_connection_t *) ev->data; r = (ngx_http_request_t *) c->data; lcf = (ngx_http_core_loc_conf_t *) ngx_http_get_module_loc_conf(r, ngx_http_core_module_ctx); if (r->discarded_buffer == NULL) { ngx_test_null(r->discarded_buffer, ngx_palloc(r->pool, lcf->discarded_buffer_size), NGX_ERROR); } size = r->client_content_length; if (size > lcf->discarded_buffer_size) { size = lcf->discarded_buffer_size; } n = ngx_event_recv(c, r->discarded_buffer, size); if (n == NGX_ERROR) { return NGX_ERROR; } if (n == NGX_AGAIN) { return NGX_OK; } r->client_content_length -= n; /* XXX: what if r->client_content_length == 0 ? */ return NGX_OK; } static int 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; c = (ngx_connection_t *) r->connection; rev = c->read; ctx = (ngx_http_log_ctx_t *) c->log->data; ctx->action = "closing request"; ngx_http_close_request(r, 0); if (rev->blocked && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) { if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) == NGX_ERROR) { return NGX_ERROR; } 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 */ if (!ngx_http_large_client_header) { len = h->last - h->pos; ngx_memcpy(h->start, h->pos, len); h->pos = h->start; h->last = h->start + len; } c->pipeline = 1; ctx->action = "reading client pipelined request line"; return ngx_http_init_request(rev); } c->pipeline = 0; h->pos = h->last = h->start; rev->event_handler = ngx_http_keepalive_handler; wev = c->write; if (wev->active && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) { if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) { return NGX_ERROR; } } ctx->action = "keepalive"; #if (HAVE_AIO_EVENT) /* aio, iocp */ if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) || blocked) { return ngx_http_keepalive_handler(rev); } #else if (blocked) { return ngx_http_keepalive_handler(rev); } #endif return NGX_OK; } static int 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) { return NGX_ERROR; /* to close connection */ } /* MSIE closes a keepalive connection with RST flag so we ignore ECONNRESET here */ rev->ignore_econnreset = 1; ngx_set_socket_errno(0); n = ngx_event_recv(c, c->buffer->last, c->buffer->end - c->buffer->last); rev->ignore_econnreset = 0; if (n == NGX_AGAIN || n == NGX_ERROR) { return n; } 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); return NGX_ERROR; /* to close connection */ } c->buffer->last += n; rev->log->handler = ngx_http_log_error; lctx->action = "reading client request line"; return ngx_http_init_request(rev); } static int ngx_http_set_lingering_close(ngx_http_request_t *r) { ngx_event_t *rev; ngx_connection_t *c; ngx_http_core_loc_conf_t *lcf; c = r->connection; rev = c->read; lcf = (ngx_http_core_loc_conf_t *) ngx_http_get_module_loc_conf(r, ngx_http_core_module_ctx); r->lingering_time = ngx_time() + lcf->lingering_time / 1000; r->connection->read->event_handler = ngx_http_lingering_close_handler; if (rev->timer_set) { ngx_del_timer(rev); } else { rev->timer_set = 1; } ngx_add_timer(rev, lcf->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) { return ngx_http_close_request(r, 0); } rev->blocked = 0; } #if !(USE_KQUEUE) if (c->write->active && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) { if (ngx_del_event(c->write, NGX_WRITE_EVENT, 0) == NGX_ERROR) { return ngx_http_close_request(r, 0); } } #endif 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"); return ngx_http_close_request(r, 0); } #if (USE_KQUEUE) if (rev->ready) { return ngx_http_lingering_close_handler(rev); } #else if (rev->ready || (ngx_event_flags & NGX_HAVE_AIO_EVENT)) { return ngx_http_lingering_close_handler(rev); } #endif return NGX_OK; } static int 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 *lcf; c = (ngx_connection_t *) rev->data; r = (ngx_http_request_t *) c->data; ngx_log_debug(c->log, "http lingering close handler"); if (rev->timedout) { return ngx_http_close_request(r, 0); } timer = r->lingering_time - ngx_time(); if (timer <= 0) { return ngx_http_close_request(r, 0); } lcf = (ngx_http_core_loc_conf_t *) ngx_http_get_module_loc_conf(r, ngx_http_core_module_ctx); 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 ((size_t)(r->header_in->end - r->header_in->last) >= lcf->discarded_buffer_size) { r->discarded_buffer = r->header_in->last; } else { ngx_test_null(r->discarded_buffer, ngx_palloc(c->pool, lcf->discarded_buffer_size), ngx_http_close_request(r, 0)); } } do { n = ngx_event_recv(c, r->discarded_buffer, lcf->discarded_buffer_size); ngx_log_debug(c->log, "lingering read: %d" _ n); if (n == NGX_ERROR || n == 0) { return ngx_http_close_request(r, 0); } } while (rev->ready); timer *= 1000; if (timer > lcf->lingering_timeout) { timer = lcf->lingering_timeout; } if (rev->timer_set) { ngx_del_timer(rev); } else { rev->timer_set = 1; } ngx_add_timer(rev, timer); return NGX_OK; } static int ngx_http_close_connection(ngx_event_t *ev) { return ngx_event_close_connection(ev); } 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->url) { return ngx_snprintf(buf, len, " while %s, client: %s, URL: %s", ctx->action, ctx->client, ctx->url); } else { return ngx_snprintf(buf, len, " while %s, client: %s", ctx->action, ctx->client); } }