Various plugins: Set the cURL option "CURLOPT_NOSIGNAL".
[collectd.git] / src / apache.c
index 6489bce..5f5441f 100644 (file)
@@ -1,7 +1,8 @@
 /**
  * collectd - src/apache.c
- * Copyright (C) 2006-2008  Florian octo Forster
- * Copyright (C) 2007  Florent EppO Monbillard
+ * Copyright (C) 2006-2009  Florian octo Forster
+ * Copyright (C) 2007       Florent EppO Monbillard
+ * Copyright (C) 2009       Amit Gupta
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -20,6 +21,7 @@
  *   Florian octo Forster <octo at verplant.org>
  *   Florent EppO Monbillard <eppo at darox.net>
  *   - connections/lighttpd extension
+ *   Amit Gupta <amit.gupta221 at gmail.com>
  **/
 
 #include "collectd.h"
 
 #include <curl/curl.h>
 
-static char *url         = NULL;
-static char *user        = NULL;
-static char *pass        = NULL;
-static char *verify_peer = NULL;
-static char *verify_host = NULL;
-static char *cacert      = NULL;
-
-static CURL *curl = NULL;
-
-static char  *apache_buffer = NULL;
-static size_t apache_buffer_size = 0;
-static size_t apache_buffer_fill = 0;
-static char   apache_curl_error[CURL_ERROR_SIZE];
-
-static const char *config_keys[] =
+enum server_enum
 {
-       "URL",
-       "User",
-       "Password",
-       "VerifyPeer",
-       "VerifyHost",
-       "CACert"
+       APACHE = 0,
+       LIGHTTPD
 };
-static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+struct apache_s
+{
+       int server_type;
+       char *name;
+       char *host;
+       char *url;
+       char *user;
+       char *pass;
+       int   verify_peer;
+       int   verify_host;
+       char *cacert;
+       char *server; /* user specific server type */
+       char *apache_buffer;
+       char apache_curl_error[CURL_ERROR_SIZE];
+       size_t apache_buffer_size;
+       size_t apache_buffer_fill;
+       CURL *curl;
+}; /* apache_s */
+
+typedef struct apache_s apache_t;
+
+/* TODO: Remove this prototype */
+static int apache_read_host (user_data_t *user_data);
+
+static void apache_free (apache_t *st)
+{
+       if (st == NULL)
+               return;
+
+       sfree (st->name);
+       sfree (st->host);
+       sfree (st->url);
+       sfree (st->user);
+       sfree (st->pass);
+       sfree (st->cacert);
+       sfree (st->server);
+       sfree (st->apache_buffer);
+       if (st->curl) {
+               curl_easy_cleanup(st->curl);
+               st->curl = NULL;
+       }
+} /* apache_free */
 
 static size_t apache_curl_callback (void *buf, size_t size, size_t nmemb,
-               void __attribute__((unused)) *stream)
+               void *user_data)
 {
        size_t len = size * nmemb;
+       apache_t *st;
+
+       st = user_data;
+       if (st == NULL)
+       {
+               ERROR ("apache plugin: apache_curl_callback: "
+                               "user_data pointer is NULL.");
+               return (0);
+       }
 
        if (len <= 0)
                return (len);
 
-       if ((apache_buffer_fill + len) >= apache_buffer_size)
+       if ((st->apache_buffer_fill + len) >= st->apache_buffer_size)
        {
                char *temp;
 
-               temp = (char *) realloc (apache_buffer,
-                               apache_buffer_fill + len + 1);
+               temp = (char *) realloc (st->apache_buffer,
+                               st->apache_buffer_fill + len + 1);
                if (temp == NULL)
                {
                        ERROR ("apache plugin: realloc failed.");
                        return (0);
                }
-               apache_buffer = temp;
-               apache_buffer_size = apache_buffer_fill + len + 1;
+               st->apache_buffer = temp;
+               st->apache_buffer_size = st->apache_buffer_fill + len + 1;
        }
 
-       memcpy (apache_buffer + apache_buffer_fill, (char *) buf, len);
-       apache_buffer_fill += len;
-       apache_buffer[apache_buffer_fill] = 0;
+       memcpy (st->apache_buffer + st->apache_buffer_fill, (char *) buf, len);
+       st->apache_buffer_fill += len;
+       st->apache_buffer[st->apache_buffer_fill] = 0;
 
        return (len);
-}
+} /* int apache_curl_callback */
 
-static int config_set (char **var, const char *value)
+static size_t apache_header_callback (void *buf, size_t size, size_t nmemb,
+               void *user_data)
 {
-       if (*var != NULL)
+       size_t len = size * nmemb;
+       apache_t *st;
+
+       st = user_data;
+       if (st == NULL)
        {
-               free (*var);
-               *var = NULL;
+               ERROR ("apache plugin: apache_header_callback: "
+                               "user_data pointer is NULL.");
+               return (0);
        }
 
-       if ((*var = strdup (value)) == NULL)
-               return (1);
+       if (len <= 0)
+               return (len);
+
+       /* look for the Server header */
+       if (strncasecmp (buf, "Server: ", strlen ("Server: ")) != 0)
+               return (len);
+
+       if (strstr (buf, "Apache") != NULL)
+               st->server_type = APACHE;
+       else if (strstr (buf, "lighttpd") != NULL)
+               st->server_type = LIGHTTPD;
        else
-               return (0);
-}
+       {
+               const char *hdr = buf;
+
+               hdr += strlen ("Server: ");
+               NOTICE ("apache plugin: Unknown server software: %s", hdr);
+       }
 
-static int config (const char *key, const char *value)
+       return (len);
+} /* apache_header_callback */
+
+/* Configuration handling functiions
+ * <Plugin apache>
+ *   <Instance "instance_name">
+ *     URL ...
+ *   </Instance>
+ *   URL ...
+ * </Plugin>
+ */
+static int config_set_string (char **ret_string, /* {{{ */
+                                   oconfig_item_t *ci)
 {
-       if (strcasecmp (key, "url") == 0)
-               return (config_set (&url, value));
-       else if (strcasecmp (key, "user") == 0)
-               return (config_set (&user, value));
-       else if (strcasecmp (key, "password") == 0)
-               return (config_set (&pass, value));
-       else if (strcasecmp (key, "verifypeer") == 0)
-               return (config_set (&verify_peer, value));
-       else if (strcasecmp (key, "verifyhost") == 0)
-               return (config_set (&verify_host, value));
-       else if (strcasecmp (key, "cacert") == 0)
-               return (config_set (&cacert, value));
-       else
+       char *string;
+
+       if ((ci->values_num != 1)
+                       || (ci->values[0].type != OCONFIG_TYPE_STRING))
+       {
+               WARNING ("apache plugin: The `%s' config option "
+                               "needs exactly one string argument.", ci->key);
                return (-1);
-}
+       }
+
+       string = strdup (ci->values[0].value.string);
+       if (string == NULL)
+       {
+               ERROR ("apache plugin: strdup failed.");
+               return (-1);
+       }
+
+       if (*ret_string != NULL)
+               free (*ret_string);
+       *ret_string = string;
+
+       return (0);
+} /* }}} int config_set_string */
 
-static int init (void)
+static int config_set_boolean (int *ret_boolean, /* {{{ */
+                                   oconfig_item_t *ci)
 {
-       static char credentials[1024];
+       if ((ci->values_num != 1)
+                       || ((ci->values[0].type != OCONFIG_TYPE_BOOLEAN)
+                               && (ci->values[0].type != OCONFIG_TYPE_STRING)))
+       {
+               WARNING ("apache plugin: The `%s' config option "
+                               "needs exactly one boolean argument.", ci->key);
+               return (-1);
+       }
 
-       if (url == NULL)
+       if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
+       {
+               if (ci->values[0].value.boolean)
+                       *ret_boolean = 1;
+               else
+                       *ret_boolean = 0;
+       }
+       else /* if (ci->values[0].type != OCONFIG_TYPE_STRING) */
        {
-               WARNING ("apache plugin: init: No URL configured, returning "
-                               "an error.");
+               char *string = ci->values[0].value.string;
+               if (IS_TRUE (string))
+                       *ret_boolean = 1;
+               else if (IS_FALSE (string))
+                       *ret_boolean = 0;
+               else
+               {
+                       ERROR ("apache plugin: Cannot parse string "
+                                       "as boolean value: %s", string);
+                       return (-1);
+               }
+       }
+
+       return (0);
+} /* }}} int config_set_boolean */
+
+static int config_add (oconfig_item_t *ci)
+{
+       apache_t *st;
+       int i;
+       int status;
+
+       if ((ci->values_num != 1)
+               || (ci->values[0].type != OCONFIG_TYPE_STRING))
+       {
+               WARNING ("apache plugin: The `%s' config option "
+                       "needs exactly one string argument.", ci->key);
                return (-1);
        }
 
-       if (curl != NULL)
+       st = (apache_t *) malloc (sizeof (*st));
+       if (st == NULL)
        {
-               curl_easy_cleanup (curl);
+               ERROR ("apache plugin: malloc failed.");
+               return (-1);
        }
 
-       if ((curl = curl_easy_init ()) == NULL)
+       memset (st, 0, sizeof (*st));
+
+       status = config_set_string (&st->name, ci);
+       if (status != 0)
        {
-               ERROR ("apache plugin: init: `curl_easy_init' failed.");
+               sfree (st);
+               return (status);
+       }
+       assert (st->name != NULL);
+
+       for (i = 0; i < ci->children_num; i++)
+       {
+               oconfig_item_t *child = ci->children + i;
+
+               if (strcasecmp ("URL", child->key) == 0)
+                       status = config_set_string (&st->url, child);
+               else if (strcasecmp ("Host", child->key) == 0)
+                       status = config_set_string (&st->host, child);
+               else if (strcasecmp ("User", child->key) == 0)
+                       status = config_set_string (&st->user, child);
+               else if (strcasecmp ("Password", child->key) == 0)
+                       status = config_set_string (&st->pass, child);
+               else if (strcasecmp ("VerifyPeer", child->key) == 0)
+                       status = config_set_boolean (&st->verify_peer, child);
+               else if (strcasecmp ("VerifyHost", child->key) == 0)
+                       status = config_set_boolean (&st->verify_host, child);
+               else if (strcasecmp ("CACert", child->key) == 0)
+                       status = config_set_string (&st->cacert, child);
+               else if (strcasecmp ("Server", child->key) == 0)
+                       status = config_set_string (&st->server, child);
+               else
+               {
+                       WARNING ("apache plugin: Option `%s' not allowed here.",
+                                       child->key);
+                       status = -1;
+               }
+
+               if (status != 0)
+                       break;
+       }
+
+       /* Check if struct is complete.. */
+       if ((status == 0) && (st->url == NULL))
+       {
+               ERROR ("apache plugin: Instance `%s': "
+                               "No URL has been configured.",
+                               st->name);
+               status = -1;
+       }
+
+       if (status == 0)
+       {
+               user_data_t ud;
+               char callback_name[3*DATA_MAX_NAME_LEN];
+
+               memset (&ud, 0, sizeof (ud));
+               ud.data = st;
+               ud.free_func = (void *) apache_free;
+
+               memset (callback_name, 0, sizeof (callback_name));
+               ssnprintf (callback_name, sizeof (callback_name),
+                               "apache/%s/%s",
+                               (st->host != NULL) ? st->host : hostname_g,
+                               (st->name != NULL) ? st->name : "default"),
+
+               status = plugin_register_complex_read (/* group = */ NULL,
+                               /* name      = */ callback_name,
+                               /* callback  = */ apache_read_host,
+                               /* interval  = */ NULL,
+                               /* user_data = */ &ud);
+       }
+
+       if (status != 0)
+       {
+               apache_free(st);
                return (-1);
        }
 
-       curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, apache_curl_callback);
-       curl_easy_setopt (curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
-       curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, apache_curl_error);
+       return (0);
+} /* int config_add */
 
-       if (user != NULL)
+static int config (oconfig_item_t *ci)
+{
+       int status = 0;
+       int i;
+       oconfig_item_t *lci = NULL; /* legacy config */
+
+       for (i = 0; i < ci->children_num; i++)
+       {
+               oconfig_item_t *child = ci->children + i;
+
+               if (strcasecmp ("Instance", child->key) == 0 && child->children_num > 0)
+                       config_add (child);
+               else
+               {
+                       /* legacy mode - convert to <Instance ...> config */
+                       if (lci == NULL)
+                       {
+                               lci = malloc (sizeof(*lci));
+                               if (lci == NULL)
+                               {
+                                       ERROR ("apache plugin: malloc failed.");
+                                       return (-1);
+                               }
+                               memset (lci, '\0', sizeof (*lci));
+                       }
+
+                       lci->children_num++;
+                       lci->children =
+                               realloc (lci->children,
+                                        lci->children_num * sizeof (*child));
+                       if (lci->children == NULL)
+                       {
+                               ERROR ("apache plugin: realloc failed.");
+                               return (-1);
+                       }
+                       memcpy (&lci->children[lci->children_num-1], child, sizeof (*child));
+               }
+       } /* for (ci->children) */
+
+       if (lci)
+       {
+               /* create a <Instance ""> entry */
+               lci->key = "Instance";
+               lci->values_num = 1;
+               lci->values = (oconfig_value_t *) malloc (lci->values_num * sizeof (oconfig_value_t));
+               lci->values[0].type = OCONFIG_TYPE_STRING;
+               lci->values[0].value.string = "";
+
+               status = config_add (lci);
+               sfree (lci->values);
+               sfree (lci->children);
+               sfree (lci);
+       }
+
+       return status;
+} /* int config */
+
+/* initialize curl for each host */
+static int init_host (apache_t *st) /* {{{ */
+{
+       static char credentials[1024];
+
+       assert (st->url != NULL);
+       /* (Assured by `config_add') */
+
+       if (st->curl != NULL)
+       {
+               curl_easy_cleanup (st->curl);
+               st->curl = NULL;
+       }
+
+       if ((st->curl = curl_easy_init ()) == NULL)
+       {
+               ERROR ("apache plugin: init_host: `curl_easy_init' failed.");
+               return (-1);
+       }
+
+       curl_easy_setopt (st->curl, CURLOPT_NOSIGNAL, 1);
+       curl_easy_setopt (st->curl, CURLOPT_WRITEFUNCTION, apache_curl_callback);
+       curl_easy_setopt (st->curl, CURLOPT_WRITEDATA, st);
+
+       /* not set as yet if the user specified string doesn't match apache or
+        * lighttpd, then ignore it. Headers will be parsed to find out the
+        * server type */
+       st->server_type = -1;
+
+       if (st->server != NULL)
+       {
+               if (strcasecmp(st->server, "apache") == 0)
+                       st->server_type = APACHE;
+               else if (strcasecmp(st->server, "lighttpd") == 0)
+                       st->server_type = LIGHTTPD;
+               else
+                       WARNING ("apache plugin: Unknown `Server' setting: %s",
+                                       st->server);
+       }
+
+       /* if not found register a header callback to determine the server_type */
+       if (st->server_type == -1)
+       {
+               curl_easy_setopt (st->curl, CURLOPT_HEADERFUNCTION, apache_header_callback);
+               curl_easy_setopt (st->curl, CURLOPT_WRITEHEADER, st);
+       }
+
+       curl_easy_setopt (st->curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
+       curl_easy_setopt (st->curl, CURLOPT_ERRORBUFFER, st->apache_curl_error);
+
+       if (st->user != NULL)
        {
                int status;
 
                status = ssnprintf (credentials, sizeof (credentials), "%s:%s",
-                               user, (pass == NULL) ? "" : pass);
+                               st->user, (st->pass == NULL) ? "" : st->pass);
                if ((status < 0) || ((size_t) status >= sizeof (credentials)))
                {
-                       ERROR ("apache plugin: init: Returning an error "
+                       ERROR ("apache plugin: init_host: Returning an error "
                                        "because the credentials have been "
                                        "truncated.");
+                       curl_easy_cleanup (st->curl);
+                       st->curl = NULL;
                        return (-1);
                }
 
-               curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
+               curl_easy_setopt (st->curl, CURLOPT_USERPWD, credentials);
        }
 
-       curl_easy_setopt (curl, CURLOPT_URL, url);
-       curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1);
+       curl_easy_setopt (st->curl, CURLOPT_URL, st->url);
+       curl_easy_setopt (st->curl, CURLOPT_FOLLOWLOCATION, 1);
 
-       if ((verify_peer == NULL) || (strcmp (verify_peer, "true") == 0))
+       if (st->verify_peer != 0)
        {
-               curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 1);
+               curl_easy_setopt (st->curl, CURLOPT_SSL_VERIFYPEER, 1);
        }
        else
        {
-               curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0);
+               curl_easy_setopt (st->curl, CURLOPT_SSL_VERIFYPEER, 0);
        }
 
-       if ((verify_host == NULL) || (strcmp (verify_host, "true") == 0))
+       if (st->verify_host != 0)
        {
-               curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 2);
+               curl_easy_setopt (st->curl, CURLOPT_SSL_VERIFYHOST, 2);
        }
        else
        {
-               curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0);
+               curl_easy_setopt (st->curl, CURLOPT_SSL_VERIFYHOST, 0);
        }
 
-       if (cacert != NULL)
+       if (st->cacert != NULL)
        {
-               curl_easy_setopt (curl, CURLOPT_CAINFO, cacert);
+               curl_easy_setopt (st->curl, CURLOPT_CAINFO, st->cacert);
        }
 
        return (0);
-} /* int init */
+} /* }}} int init_host */
 
-static void submit_counter (const char *type, const char *type_instance,
-               counter_t value)
+static void submit_value (const char *type, const char *type_instance,
+               value_t value, apache_t *st)
 {
-       value_t values[1];
        value_list_t vl = VALUE_LIST_INIT;
 
-       values[0].counter = value;
-
-       vl.values = values;
+       vl.values = &value;
        vl.values_len = 1;
-       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+
+       sstrncpy (vl.host, (st->host != NULL) ? st->host : hostname_g,
+                       sizeof (vl.host));
+
        sstrncpy (vl.plugin, "apache", sizeof (vl.plugin));
-       sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
-       sstrncpy (vl.type, type, sizeof (vl.type));
+       if (st->name != NULL)
+               sstrncpy (vl.plugin_instance, st->name,
+                               sizeof (vl.plugin_instance));
 
+       sstrncpy (vl.type, type, sizeof (vl.type));
        if (type_instance != NULL)
                sstrncpy (vl.type_instance, type_instance,
                                sizeof (vl.type_instance));
 
        plugin_dispatch_values (&vl);
+} /* void submit_value */
+
+static void submit_counter (const char *type, const char *type_instance,
+               counter_t c, apache_t *st)
+{
+       value_t v;
+       v.counter = c;
+       submit_value (type, type_instance, v, st);
 } /* void submit_counter */
 
 static void submit_gauge (const char *type, const char *type_instance,
-               gauge_t value)
+               gauge_t g, apache_t *st)
 {
-       value_t values[1];
-       value_list_t vl = VALUE_LIST_INIT;
-
-       values[0].gauge = value;
+       value_t v;
+       v.gauge = g;
+       submit_value (type, type_instance, v, st);
+} /* void submit_gauge */
 
-       vl.values = values;
-       vl.values_len = 1;
-       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
-       sstrncpy (vl.plugin, "apache", sizeof (vl.plugin));
-       sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
-       sstrncpy (vl.type, type, sizeof (vl.type));
-
-       if (type_instance != NULL)
-               sstrncpy (vl.type_instance, type_instance,
-                               sizeof (vl.type_instance));
-
-       plugin_dispatch_values (&vl);
-} /* void submit_counter */
-
-static void submit_scoreboard (char *buf)
+static void submit_scoreboard (char *buf, apache_t *st)
 {
        /*
         * Scoreboard Key:
-        * "_" Waiting for Connection, "S" Starting up, "R" Reading Request,
+        * "_" Waiting for Connection, "S" Starting up,
+        * "R" Reading Request for apache and read-POST for lighttpd,
         * "W" Sending Reply, "K" Keepalive (read), "D" DNS Lookup,
         * "C" Closing connection, "L" Logging, "G" Gracefully finishing,
         * "I" Idle cleanup of worker, "." Open slot with no current process
+        * Lighttpd specific legends -
+        * "E" hard error, "." connect, "h" handle-request,
+        * "q" request-start, "Q" request-end, "s" response-start
+        * "S" response-end, "r" read
         */
        long long open      = 0LL;
        long long waiting   = 0LL;
@@ -253,8 +550,16 @@ static void submit_scoreboard (char *buf)
        long long finishing = 0LL;
        long long idle_cleanup = 0LL;
 
-       int i;
+       /* lighttpd specific */
+       long long hard_error     = 0LL;
+       long long lighttpd_read  = 0LL;
+       long long handle_request = 0LL;
+       long long request_start  = 0LL;
+       long long request_end    = 0LL;
+       long long response_start = 0LL;
+       long long response_end   = 0LL;
 
+       int i;
        for (i = 0; buf[i] != '\0'; i++)
        {
                if (buf[i] == '.') open++;
@@ -268,22 +573,46 @@ static void submit_scoreboard (char *buf)
                else if (buf[i] == 'L') logging++;
                else if (buf[i] == 'G') finishing++;
                else if (buf[i] == 'I') idle_cleanup++;
+               else if (buf[i] == 'r') lighttpd_read++;
+               else if (buf[i] == 'h') handle_request++;
+               else if (buf[i] == 'E') hard_error++;
+               else if (buf[i] == 'q') request_start++;
+               else if (buf[i] == 'Q') request_end++;
+               else if (buf[i] == 's') response_start++;
+               else if (buf[i] == 'S') response_end++;
        }
 
-       submit_gauge ("apache_scoreboard", "open"     , open);
-       submit_gauge ("apache_scoreboard", "waiting"  , waiting);
-       submit_gauge ("apache_scoreboard", "starting" , starting);
-       submit_gauge ("apache_scoreboard", "reading"  , reading);
-       submit_gauge ("apache_scoreboard", "sending"  , sending);
-       submit_gauge ("apache_scoreboard", "keepalive", keepalive);
-       submit_gauge ("apache_scoreboard", "dnslookup", dnslookup);
-       submit_gauge ("apache_scoreboard", "closing"  , closing);
-       submit_gauge ("apache_scoreboard", "logging"  , logging);
-       submit_gauge ("apache_scoreboard", "finishing", finishing);
-       submit_gauge ("apache_scoreboard", "idle_cleanup", idle_cleanup);
+       if (st->server_type == APACHE)
+       {
+               submit_gauge ("apache_scoreboard", "open"     , open, st);
+               submit_gauge ("apache_scoreboard", "waiting"  , waiting, st);
+               submit_gauge ("apache_scoreboard", "starting" , starting, st);
+               submit_gauge ("apache_scoreboard", "reading"  , reading, st);
+               submit_gauge ("apache_scoreboard", "sending"  , sending, st);
+               submit_gauge ("apache_scoreboard", "keepalive", keepalive, st);
+               submit_gauge ("apache_scoreboard", "dnslookup", dnslookup, st);
+               submit_gauge ("apache_scoreboard", "closing"  , closing, st);
+               submit_gauge ("apache_scoreboard", "logging"  , logging, st);
+               submit_gauge ("apache_scoreboard", "finishing", finishing, st);
+               submit_gauge ("apache_scoreboard", "idle_cleanup", idle_cleanup, st);
+       }
+       else
+       {
+               submit_gauge ("apache_scoreboard", "connect"       , open, st);
+               submit_gauge ("apache_scoreboard", "close"         , closing, st);
+               submit_gauge ("apache_scoreboard", "hard_error"    , hard_error, st);
+               submit_gauge ("apache_scoreboard", "read"          , lighttpd_read, st);
+               submit_gauge ("apache_scoreboard", "read_post"     , reading, st);
+               submit_gauge ("apache_scoreboard", "write"         , sending, st);
+               submit_gauge ("apache_scoreboard", "handle_request", handle_request, st);
+               submit_gauge ("apache_scoreboard", "request_start" , request_start, st);
+               submit_gauge ("apache_scoreboard", "request_end"   , request_end, st);
+               submit_gauge ("apache_scoreboard", "response_start", response_start, st);
+               submit_gauge ("apache_scoreboard", "response_end"  , response_end, st);
+       }
 }
 
-static int apache_read (void)
+static int apache_read_host (user_data_t *user_data) /* {{{ */
 {
        int i;
 
@@ -295,20 +624,40 @@ static int apache_read (void)
        char *fields[4];
        int   fields_num;
 
-       if (curl == NULL)
-               return (-1);
-       if (url == NULL)
-               return (-1);
+       apache_t *st;
+
+       st = user_data->data;
+
+       assert (st->url != NULL);
+       /* (Assured by `config_add') */
+
+       if (st->curl == NULL)
+       {
+               int status;
+
+               status = init_host (st);
+               if (status != 0)
+                       return (-1);
+       }
+       assert (st->curl != NULL);
 
-       apache_buffer_fill = 0;
-       if (curl_easy_perform (curl) != 0)
+       st->apache_buffer_fill = 0;
+       if (curl_easy_perform (st->curl) != 0)
        {
                ERROR ("apache: curl_easy_perform failed: %s",
-                               apache_curl_error);
+                               st->apache_curl_error);
                return (-1);
        }
 
-       ptr = apache_buffer;
+       /* fallback - server_type to apache if not set at this time */
+       if (st->server_type == -1)
+       {
+               WARNING ("apache plugin: Unable to determine server software "
+                               "automatically. Will assume Apache.");
+               st->server_type = APACHE;
+       }
+
+       ptr = st->apache_buffer;
        saveptr = NULL;
        while ((lines[lines_num] = strtok_r (ptr, "\n\r", &saveptr)) != NULL)
        {
@@ -328,30 +677,33 @@ static int apache_read (void)
                        if ((strcmp (fields[0], "Total") == 0)
                                        && (strcmp (fields[1], "Accesses:") == 0))
                                submit_counter ("apache_requests", "",
-                                               atoll (fields[2]));
+                                               atoll (fields[2]), st);
                        else if ((strcmp (fields[0], "Total") == 0)
                                        && (strcmp (fields[1], "kBytes:") == 0))
                                submit_counter ("apache_bytes", "",
-                                               1024LL * atoll (fields[2]));
+                                               1024LL * atoll (fields[2]), st);
                }
                else if (fields_num == 2)
                {
                        if (strcmp (fields[0], "Scoreboard:") == 0)
-                               submit_scoreboard (fields[1]);
-                       else if (strcmp (fields[0], "BusyServers:") == 0)
-                               submit_gauge ("apache_connections", NULL, atol (fields[1]));
+                               submit_scoreboard (fields[1], st);
+                       else if ((strcmp (fields[0], "BusyServers:") == 0) /* Apache 1.* */
+                                       || (strcmp (fields[0], "BusyWorkers:") == 0) /* Apache 2.* */)
+                               submit_gauge ("apache_connections", NULL, atol (fields[1]), st);
+                       else if ((strcmp (fields[0], "IdleServers:") == 0) /* Apache 1.x */
+                                       || (strcmp (fields[0], "IdleWorkers:") == 0) /* Apache 2.x */)
+                               submit_gauge ("apache_idle_workers", NULL, atol (fields[1]), st);
                }
        }
 
-       apache_buffer_fill = 0;
+       st->apache_buffer_fill = 0;
 
        return (0);
-} /* int apache_read */
+} /* }}} int apache_read_host */
 
 void module_register (void)
 {
-       plugin_register_config ("apache", config,
-                       config_keys, config_keys_num);
-       plugin_register_init ("apache", init);
-       plugin_register_read ("apache", apache_read);
+       plugin_register_complex_config ("apache", config);
 } /* void module_register */
+
+/* vim: set sw=8 noet fdm=marker : */