1 files changed, 284 insertions, 0 deletions
diff --git a/modules/loggers/mod_logio.c b/modules/loggers/mod_logio.c
new file mode 100644
index 0000000..b609f7f
--- /dev/null
+++ b/modules/loggers/mod_logio.c
@@ -0,0 +1,284 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/*
+ * Written by Bojan Smojver <bojan rexursive.com>.
+ */
+
+#include "apr_strings.h"
+#include "apr_lib.h"
+#include "apr_hash.h"
+#include "apr_optional.h"
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "ap_config.h"
+#include "mod_log_config.h"
+#include "httpd.h"
+#include "http_core.h"
+#include "http_config.h"
+#include "http_connection.h"
+#include "http_protocol.h"
+#include "http_request.h"
+
+module AP_MODULE_DECLARE_DATA logio_module;
+
+static const char logio_filter_name[] = "LOG_INPUT_OUTPUT";
+static const char logio_ttfb_filter_name[] = "LOGIO_TTFB_OUT";
+
+/*
+ * Logging of input and output config...
+ */
+
+typedef struct logio_config_t {
+    apr_off_t bytes_in;
+    apr_off_t bytes_out;
+    apr_off_t bytes_last_request;
+} logio_config_t;
+
+typedef struct logio_dirconf_t {
+    unsigned int track_ttfb:1;
+} logio_dirconf_t;
+
+typedef struct logio_req_t {
+    apr_time_t ttfb;
+} logio_req_t;
+
+
+
+/*
+ * Optional function for the core to add to bytes_out
+ */
+
+static void ap_logio_add_bytes_out(conn_rec *c, apr_off_t bytes)
+{
+    logio_config_t *cf = ap_get_module_config(c->conn_config, &logio_module);
+    cf->bytes_out += bytes;
+}
+
+/*
+ * Optional function for modules to adjust bytes_in
+ */
+
+static void ap_logio_add_bytes_in(conn_rec *c, apr_off_t bytes)
+{
+    logio_config_t *cf = ap_get_module_config(c->conn_config, &logio_module);
+
+    cf->bytes_in += bytes;
+}
+
+/*
+ * Optional function to get total byte count of last request for
+ * ap_increment_counts.
+ */
+
+static apr_off_t ap_logio_get_last_bytes(conn_rec *c)
+{
+    logio_config_t *cf = ap_get_module_config(c->conn_config, &logio_module);
+
+    return cf->bytes_last_request;
+}
+
+/*
+ * Format items...
+ */
+
+static const char *log_bytes_in(request_rec *r, char *a)
+{
+    logio_config_t *cf = ap_get_module_config(r->connection->conn_config,
+                                              &logio_module);
+
+    return apr_off_t_toa(r->pool, cf->bytes_in);
+}
+
+static const char *log_bytes_out(request_rec *r, char *a)
+{
+    logio_config_t *cf = ap_get_module_config(r->connection->conn_config,
+                                              &logio_module);
+
+    return apr_off_t_toa(r->pool, cf->bytes_out);
+}
+
+static const char *log_bytes_combined(request_rec *r, char *a)
+{
+    logio_config_t *cf = ap_get_module_config(r->connection->conn_config,
+                                              &logio_module);
+
+    return apr_off_t_toa(r->pool, cf->bytes_out + cf->bytes_in);
+}
+
+static const char *log_ttfb(request_rec *r, char *a)
+{
+    logio_req_t *rconf = ap_get_module_config(r->request_config,
+                                           &logio_module);
+
+    if (!rconf || !rconf->ttfb) { 
+        return "-";
+    }
+
+    return apr_psprintf(r->pool, "%" APR_TIME_T_FMT, rconf->ttfb);
+}
+/*
+ * Reset counters after logging...
+ */
+
+static int logio_transaction(request_rec *r)
+{
+    logio_config_t *cf = ap_get_module_config(r->connection->conn_config,
+                                              &logio_module);
+
+    /* need to save byte count of last request for ap_increment_counts */
+    cf->bytes_last_request = cf->bytes_in + cf->bytes_out;
+    cf->bytes_in = cf->bytes_out = 0;
+
+    return OK;
+}
+
+/*
+ * Logging of input filter...
+ */
+
+static apr_status_t logio_in_filter(ap_filter_t *f,
+                                    apr_bucket_brigade *bb,
+                                    ap_input_mode_t mode,
+                                    apr_read_type_e block,
+                                    apr_off_t readbytes)
+{
+    apr_off_t length;
+    apr_status_t status;
+    logio_config_t *cf = ap_get_module_config(f->c->conn_config, &logio_module);
+
+    status = ap_get_brigade(f->next, bb, mode, block, readbytes);
+
+    apr_brigade_length (bb, 0, &length);
+
+    if (length > 0)
+        cf->bytes_in += length;
+
+    return status;
+}
+
+/*
+ * The hooks...
+ */
+
+static int logio_pre_conn(conn_rec *c, void *csd)
+{
+    logio_config_t *cf = apr_pcalloc(c->pool, sizeof(*cf));
+
+    ap_set_module_config(c->conn_config, &logio_module, cf);
+
+    ap_add_input_filter(logio_filter_name, NULL, NULL, c);
+
+    return OK;
+}
+
+static int logio_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+    APR_OPTIONAL_FN_TYPE(ap_register_log_handler) *log_pfn_register;
+
+    log_pfn_register = APR_RETRIEVE_OPTIONAL_FN(ap_register_log_handler);
+
+    if (log_pfn_register) {
+        log_pfn_register(p, "I", log_bytes_in, 0);
+        log_pfn_register(p, "O", log_bytes_out, 0);
+        log_pfn_register(p, "S", log_bytes_combined, 0);
+        log_pfn_register(p, "^FB", log_ttfb, 0);
+    }
+
+    return OK;
+}
+
+static apr_status_t logio_ttfb_filter(ap_filter_t *f, apr_bucket_brigade *b)
+{
+    request_rec *r = f->r;
+    logio_dirconf_t *conf = ap_get_module_config(r->per_dir_config,
+                                                 &logio_module);
+    if (conf && conf->track_ttfb) { 
+        logio_req_t *rconf = ap_get_module_config(r->request_config, 
+                                                  &logio_module);
+        if (rconf == NULL) { 
+            rconf = apr_pcalloc(r->pool, sizeof(logio_req_t));
+            rconf->ttfb = apr_time_now() - r->request_time;
+            ap_set_module_config(r->request_config, &logio_module, rconf);
+        }
+    }
+    ap_remove_output_filter(f);
+    return ap_pass_brigade(f->next, b);
+}
+
+static void logio_insert_filter(request_rec * r)
+{
+    logio_dirconf_t *conf = ap_get_module_config(r->per_dir_config,
+                                                 &logio_module);
+    if (conf->track_ttfb) { 
+        ap_add_output_filter(logio_ttfb_filter_name, NULL, r, r->connection);
+    }
+}
+
+static const char *logio_track_ttfb(cmd_parms *cmd, void *in_dir_config, int arg)
+{
+    logio_dirconf_t *dir_config = in_dir_config;
+    dir_config->track_ttfb = arg;
+    return NULL;
+}
+
+static void *create_logio_dirconf (apr_pool_t *p, char *dummy)
+{
+    logio_dirconf_t *new =
+        (logio_dirconf_t *) apr_pcalloc(p, sizeof(logio_dirconf_t));
+    return (void *) new;
+}
+
+
+static const command_rec logio_cmds[] = {
+    AP_INIT_FLAG ("LogIOTrackTTFB", logio_track_ttfb, NULL, OR_ALL,
+                  "Set to 'ON' to enable tracking time to first byte"),
+    {NULL}
+};
+
+
+static void register_hooks(apr_pool_t *p)
+{
+    static const char *pre[] = { "mod_log_config.c", NULL };
+
+    ap_hook_pre_connection(logio_pre_conn, NULL, NULL, APR_HOOK_MIDDLE);
+    ap_hook_pre_config(logio_pre_config, NULL, NULL, APR_HOOK_REALLY_FIRST);
+    ap_hook_log_transaction(logio_transaction, pre, NULL, APR_HOOK_MIDDLE);
+
+    ap_register_input_filter(logio_filter_name, logio_in_filter, NULL,
+                             AP_FTYPE_NETWORK - 1);
+
+    ap_hook_insert_filter(logio_insert_filter, NULL, NULL, APR_HOOK_LAST);
+    ap_register_output_filter(logio_ttfb_filter_name, logio_ttfb_filter, NULL,
+                              AP_FTYPE_RESOURCE);
+
+    APR_REGISTER_OPTIONAL_FN(ap_logio_add_bytes_out);
+    APR_REGISTER_OPTIONAL_FN(ap_logio_add_bytes_in);
+    APR_REGISTER_OPTIONAL_FN(ap_logio_get_last_bytes);
+}
+
+AP_DECLARE_MODULE(logio) =
+{
+    STANDARD20_MODULE_STUFF,
+    create_logio_dirconf,       /* create per-dir config */ 
+    NULL,                       /* merge per-dir config */
+    NULL,                       /* server config */
+    NULL,                       /* merge server config */
+    logio_cmds,                 /* command apr_table_t */
+    register_hooks              /* register hooks */
+};