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/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* Written by Bojan Smojver <bojan rexursive.com>:
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* The argument to LogFormat and CustomLog is a string, which can include
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* literal characters copied into the log files, and '%' directives as
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* %...I: bytes received, including request and headers, cannot be zero
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* %...O: bytes sent, including headers, cannot be zero
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#include "apr_strings.h"
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#include "apr_optional.h"
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#define APR_WANT_STRFUNC
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#include "ap_config.h"
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#include "mod_log_config.h"
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#include "http_core.h"
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#include "http_config.h"
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#include "http_connection.h"
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#include "http_protocol.h"
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module AP_MODULE_DECLARE_DATA logio_module;
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static const char logio_filter_name[] = "LOG_INPUT_OUTPUT";
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* Logging of input and output config...
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typedef struct logio_config_t {
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* Optional function for the core to add to bytes_out
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static void ap_logio_add_bytes_out(conn_rec *c, apr_off_t bytes){
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logio_config_t *cf = ap_get_module_config(c->conn_config, &logio_module);
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cf->bytes_out += bytes;
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static const char *log_bytes_in(request_rec *r, char *a)
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logio_config_t *cf = ap_get_module_config(r->connection->conn_config,
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return apr_off_t_toa(r->pool, cf->bytes_in);
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static const char *log_bytes_out(request_rec *r, char *a)
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logio_config_t *cf = ap_get_module_config(r->connection->conn_config,
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return apr_off_t_toa(r->pool, cf->bytes_out);
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* Reset counters after logging...
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static int logio_transaction(request_rec *r)
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logio_config_t *cf = ap_get_module_config(r->connection->conn_config,
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cf->bytes_in = cf->bytes_out = 0;
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* Logging of input and output filters...
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static apr_status_t logio_in_filter(ap_filter_t *f,
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apr_bucket_brigade *bb,
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ap_input_mode_t mode,
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apr_read_type_e block,
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apr_off_t readbytes) {
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logio_config_t *cf = ap_get_module_config(f->c->conn_config, &logio_module);
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status = ap_get_brigade(f->next, bb, mode, block, readbytes);
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apr_brigade_length (bb, 0, &length);
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cf->bytes_in += length;
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static apr_status_t logio_out_filter(ap_filter_t *f,
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apr_bucket_brigade *bb) {
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apr_bucket *b = APR_BRIGADE_LAST(bb);
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/* End of data, make sure we flush */
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if (APR_BUCKET_IS_EOS(b)) {
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APR_BUCKET_INSERT_BEFORE(b,
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apr_bucket_flush_create(f->c->bucket_alloc));
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return ap_pass_brigade(f->next, bb);
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static int logio_pre_conn(conn_rec *c, void *csd) {
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logio_config_t *cf = apr_pcalloc(c->pool, sizeof(*cf));
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ap_set_module_config(c->conn_config, &logio_module, cf);
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ap_add_input_filter(logio_filter_name, NULL, NULL, c);
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ap_add_output_filter(logio_filter_name, NULL, NULL, c);
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static int logio_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
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static APR_OPTIONAL_FN_TYPE(ap_register_log_handler) *log_pfn_register;
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log_pfn_register = APR_RETRIEVE_OPTIONAL_FN(ap_register_log_handler);
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if (log_pfn_register) {
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log_pfn_register(p, "I", log_bytes_in, 0);
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log_pfn_register(p, "O", log_bytes_out, 0);
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static void register_hooks(apr_pool_t *p)
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static const char *pre[] = { "mod_log_config.c", NULL };
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ap_hook_pre_connection(logio_pre_conn, NULL, NULL, APR_HOOK_MIDDLE);
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ap_hook_pre_config(logio_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
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ap_hook_log_transaction(logio_transaction, pre, NULL, APR_HOOK_MIDDLE);
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ap_register_input_filter(logio_filter_name, logio_in_filter, NULL,
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AP_FTYPE_NETWORK - 1);
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ap_register_output_filter(logio_filter_name, logio_out_filter, NULL,
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AP_FTYPE_NETWORK - 1);
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APR_REGISTER_OPTIONAL_FN(ap_logio_add_bytes_out);
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module AP_MODULE_DECLARE_DATA logio_module =
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STANDARD20_MODULE_STUFF,
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NULL, /* create per-dir config */
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NULL, /* merge per-dir config */
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NULL, /* server config */
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NULL, /* merge server config */
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NULL, /* command apr_table_t */
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register_hooks /* register hooks */