| /* Copyright 1999-2005 The Apache Software Foundation or its licensors, as |
| * applicable. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "apr_strings.h" |
| #include "apr_thread_proc.h" /* for RLIMIT stuff */ |
| |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| |
| #define CORE_PRIVATE |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "http_connection.h" |
| #include "http_core.h" |
| #include "http_protocol.h" /* For index_of_response(). Grump. */ |
| #include "http_request.h" |
| |
| #include "util_filter.h" |
| #include "util_ebcdic.h" |
| #include "ap_mpm.h" |
| #include "scoreboard.h" |
| |
| #include "mod_core.h" |
| |
| /* Handles for core filters */ |
| AP_DECLARE_DATA ap_filter_rec_t *ap_http_input_filter_handle; |
| AP_DECLARE_DATA ap_filter_rec_t *ap_http_header_filter_handle; |
| AP_DECLARE_DATA ap_filter_rec_t *ap_chunk_filter_handle; |
| AP_DECLARE_DATA ap_filter_rec_t *ap_http_outerror_filter_handle; |
| AP_DECLARE_DATA ap_filter_rec_t *ap_byterange_filter_handle; |
| |
| static const char *set_keep_alive_timeout(cmd_parms *cmd, void *dummy, |
| const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_LOC_FILE|NOT_IN_LIMIT); |
| if (err != NULL) { |
| return err; |
| } |
| |
| cmd->server->keep_alive_timeout = apr_time_from_sec(atoi(arg)); |
| return NULL; |
| } |
| |
| static const char *set_keep_alive(cmd_parms *cmd, void *dummy, |
| const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_LOC_FILE|NOT_IN_LIMIT); |
| if (err != NULL) { |
| return err; |
| } |
| |
| /* We've changed it to On/Off, but used to use numbers |
| * so we accept anything but "Off" or "0" as "On" |
| */ |
| if (!strcasecmp(arg, "off") || !strcmp(arg, "0")) { |
| cmd->server->keep_alive = 0; |
| } |
| else { |
| cmd->server->keep_alive = 1; |
| } |
| return NULL; |
| } |
| |
| static const char *set_keep_alive_max(cmd_parms *cmd, void *dummy, |
| const char *arg) |
| { |
| const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_LOC_FILE|NOT_IN_LIMIT); |
| if (err != NULL) { |
| return err; |
| } |
| |
| cmd->server->keep_alive_max = atoi(arg); |
| return NULL; |
| } |
| |
| static const command_rec http_cmds[] = { |
| AP_INIT_TAKE1("KeepAliveTimeout", set_keep_alive_timeout, NULL, RSRC_CONF, |
| "Keep-Alive timeout duration (sec)"), |
| AP_INIT_TAKE1("MaxKeepAliveRequests", set_keep_alive_max, NULL, RSRC_CONF, |
| "Maximum number of Keep-Alive requests per connection, " |
| "or 0 for infinite"), |
| AP_INIT_TAKE1("KeepAlive", set_keep_alive, NULL, RSRC_CONF, |
| "Whether persistent connections should be On or Off"), |
| { NULL } |
| }; |
| |
| static const char *http_scheme(const request_rec *r) |
| { |
| return "http"; |
| } |
| |
| static apr_port_t http_port(const request_rec *r) |
| { |
| return DEFAULT_HTTP_PORT; |
| } |
| |
| static int ap_process_http_async_connection(conn_rec *c) |
| { |
| request_rec *r; |
| conn_state_t *cs = c->cs; |
| |
| AP_DEBUG_ASSERT(cs->state == CONN_STATE_READ_REQUEST_LINE); |
| |
| while (cs->state == CONN_STATE_READ_REQUEST_LINE) { |
| ap_update_child_status(c->sbh, SERVER_BUSY_READ, NULL); |
| |
| if ((r = ap_read_request(c))) { |
| |
| c->keepalive = AP_CONN_UNKNOWN; |
| /* process the request if it was read without error */ |
| |
| ap_update_child_status(c->sbh, SERVER_BUSY_WRITE, r); |
| if (r->status == HTTP_OK) |
| ap_process_request(r); |
| |
| if (ap_extended_status) |
| ap_increment_counts(c->sbh, r); |
| |
| if (c->keepalive != AP_CONN_KEEPALIVE || c->aborted |
| || ap_graceful_stop_signalled()) { |
| cs->state = CONN_STATE_LINGER; |
| } |
| else if (!c->data_in_input_filters) { |
| cs->state = CONN_STATE_CHECK_REQUEST_LINE_READABLE; |
| } |
| |
| /* else we are pipelining. Stay in READ_REQUEST_LINE state |
| * and stay in the loop |
| */ |
| |
| apr_pool_destroy(r->pool); |
| } |
| else { /* ap_read_request failed - client may have closed */ |
| cs->state = CONN_STATE_LINGER; |
| } |
| } |
| |
| return OK; |
| } |
| |
| static int ap_process_http_connection(conn_rec *c) |
| { |
| request_rec *r; |
| apr_socket_t *csd = NULL; |
| |
| /* |
| * Read and process each request found on our connection |
| * until no requests are left or we decide to close. |
| */ |
| |
| ap_update_child_status(c->sbh, SERVER_BUSY_READ, NULL); |
| while ((r = ap_read_request(c)) != NULL) { |
| |
| c->keepalive = AP_CONN_UNKNOWN; |
| /* process the request if it was read without error */ |
| |
| ap_update_child_status(c->sbh, SERVER_BUSY_WRITE, r); |
| if (r->status == HTTP_OK) |
| ap_process_request(r); |
| |
| if (ap_extended_status) |
| ap_increment_counts(c->sbh, r); |
| |
| if (c->keepalive != AP_CONN_KEEPALIVE || c->aborted) |
| break; |
| |
| ap_update_child_status(c->sbh, SERVER_BUSY_KEEPALIVE, r); |
| apr_pool_destroy(r->pool); |
| |
| if (ap_graceful_stop_signalled()) |
| break; |
| |
| if (!csd) { |
| csd = ap_get_module_config(c->conn_config, &core_module); |
| } |
| apr_socket_opt_set(csd, APR_INCOMPLETE_READ, 1); |
| apr_socket_timeout_set(csd, c->base_server->keep_alive_timeout); |
| /* Go straight to select() to wait for the next request */ |
| } |
| |
| return OK; |
| } |
| |
| static int http_create_request(request_rec *r) |
| { |
| if (!r->main && !r->prev) { |
| ap_add_output_filter_handle(ap_byterange_filter_handle, |
| NULL, r, r->connection); |
| ap_add_output_filter_handle(ap_content_length_filter_handle, |
| NULL, r, r->connection); |
| ap_add_output_filter_handle(ap_http_header_filter_handle, |
| NULL, r, r->connection); |
| ap_add_output_filter_handle(ap_http_outerror_filter_handle, |
| NULL, r, r->connection); |
| } |
| |
| return OK; |
| } |
| |
| static void register_hooks(apr_pool_t *p) |
| { |
| /** |
| * If we ae using an MPM That Supports Async Connections, |
| * use a different processing function |
| */ |
| int async_mpm = 0; |
| if (ap_mpm_query(AP_MPMQ_IS_ASYNC, &async_mpm) == APR_SUCCESS |
| && async_mpm == 1) { |
| ap_hook_process_connection(ap_process_http_async_connection, NULL, |
| NULL, APR_HOOK_REALLY_LAST); |
| } |
| else { |
| ap_hook_process_connection(ap_process_http_connection, NULL, NULL, |
| APR_HOOK_REALLY_LAST); |
| } |
| |
| ap_hook_map_to_storage(ap_send_http_trace,NULL,NULL,APR_HOOK_MIDDLE); |
| ap_hook_http_scheme(http_scheme,NULL,NULL,APR_HOOK_REALLY_LAST); |
| ap_hook_default_port(http_port,NULL,NULL,APR_HOOK_REALLY_LAST); |
| ap_hook_create_request(http_create_request, NULL, NULL, APR_HOOK_REALLY_LAST); |
| ap_http_input_filter_handle = |
| ap_register_input_filter("HTTP_IN", ap_http_filter, |
| NULL, AP_FTYPE_PROTOCOL); |
| ap_http_header_filter_handle = |
| ap_register_output_filter("HTTP_HEADER", ap_http_header_filter, |
| NULL, AP_FTYPE_PROTOCOL); |
| ap_chunk_filter_handle = |
| ap_register_output_filter("CHUNK", ap_http_chunk_filter, |
| NULL, AP_FTYPE_TRANSCODE); |
| ap_http_outerror_filter_handle = |
| ap_register_output_filter("HTTP_OUTERROR", ap_http_outerror_filter, |
| NULL, AP_FTYPE_PROTOCOL); |
| ap_byterange_filter_handle = |
| ap_register_output_filter("BYTERANGE", ap_byterange_filter, |
| NULL, AP_FTYPE_PROTOCOL); |
| ap_method_registry_init(p); |
| } |
| |
| module AP_MODULE_DECLARE_DATA http_module = { |
| STANDARD20_MODULE_STUFF, |
| NULL, /* create per-directory config structure */ |
| NULL, /* merge per-directory config structures */ |
| NULL, /* create per-server config structure */ |
| NULL, /* merge per-server config structures */ |
| http_cmds, /* command apr_table_t */ |
| register_hooks /* register hooks */ |
| }; |
