--- /dev/null
+/**
+ * collectd - src/curl.c
+ * Copyright (C) 2006-2009 Florian octo Forster
+ *
+ * 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
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * Florian octo Forster <octo at verplant.org>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "configfile.h"
+#include "utils_match.h"
+
+#include <curl/curl.h>
+
+/*
+ * Data types
+ */
+struct web_match_s;
+typedef struct web_match_s web_match_t;
+struct web_match_s /* {{{ */
+{
+ char *regex;
+ int dstype;
+ char *type;
+ char *instance;
+
+ cu_match_t *match;
+
+ web_match_t *next;
+}; /* }}} */
+
+struct web_page_s;
+typedef struct web_page_s web_page_t;
+struct web_page_s /* {{{ */
+{
+ char *instance;
+
+ char *url;
+ char *user;
+ char *pass;
+ char *credentials;
+ int verify_peer;
+ int verify_host;
+ char *cacert;
+
+ CURL *curl;
+ char curl_errbuf[CURL_ERROR_SIZE];
+ char *buffer;
+ size_t buffer_size;
+ size_t buffer_fill;
+
+ web_match_t *matches;
+
+ web_page_t *next;
+}; /* }}} */
+
+/*
+ * Global variables;
+ */
+/* static CURLM *curl = NULL; */
+static web_page_t *pages_g = NULL;
+
+/*
+ * Private functions
+ */
+static size_t cc_curl_callback (void *buf, /* {{{ */
+ size_t size, size_t nmemb, void *user_data)
+{
+ web_page_t *wp;
+ size_t len;
+
+ len = size * nmemb;
+ if (len <= 0)
+ return (len);
+
+ wp = user_data;
+ if (wp == NULL)
+ return (0);
+
+ if ((wp->buffer_fill + len) >= wp->buffer_size)
+ {
+ char *temp;
+ size_t temp_size;
+
+ temp_size = wp->buffer_fill + len + 1;
+ temp = (char *) realloc (wp->buffer, temp_size);
+ if (temp == NULL)
+ {
+ ERROR ("curl plugin: realloc failed.");
+ return (0);
+ }
+ wp->buffer = temp;
+ wp->buffer_size = temp_size;
+ }
+
+ memcpy (wp->buffer + wp->buffer_fill, (char *) buf, len);
+ wp->buffer_fill += len;
+ wp->buffer[wp->buffer_fill] = 0;
+
+ return (len);
+} /* }}} size_t cc_curl_callback */
+
+static void cc_web_match_free (web_match_t *wm) /* {{{ */
+{
+ if (wm == NULL)
+ return;
+
+ sfree (wm->regex);
+ sfree (wm->type);
+ sfree (wm->instance);
+ match_destroy (wm->match);
+ cc_web_match_free (wm->next);
+ sfree (wm);
+} /* }}} void cc_web_match_free */
+
+static void cc_web_page_free (web_page_t *wp) /* {{{ */
+{
+ if (wp == NULL)
+ return;
+
+ if (wp->curl != NULL)
+ curl_easy_cleanup (wp->curl);
+ wp->curl = NULL;
+
+ sfree (wp->instance);
+
+ sfree (wp->url);
+ sfree (wp->user);
+ sfree (wp->pass);
+ sfree (wp->credentials);
+ sfree (wp->cacert);
+
+ sfree (wp->buffer);
+
+ cc_web_match_free (wp->matches);
+ cc_web_page_free (wp->next);
+ sfree (wp);
+} /* }}} void cc_web_page_free */
+
+static int cc_config_add_string (const char *name, char **dest, /* {{{ */
+ oconfig_item_t *ci)
+{
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("curl plugin: `%s' needs exactly one string argument.", name);
+ return (-1);
+ }
+
+ sfree (*dest);
+ *dest = strdup (ci->values[0].value.string);
+ if (*dest == NULL)
+ return (-1);
+
+ return (0);
+} /* }}} int cc_config_add_string */
+
+static int cc_config_set_boolean (const char *name, int *dest, /* {{{ */
+ oconfig_item_t *ci)
+{
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
+ {
+ WARNING ("curl plugin: `%s' needs exactly one boolean argument.", name);
+ return (-1);
+ }
+
+ *dest = ci->values[0].value.boolean ? 1 : 0;
+
+ return (0);
+} /* }}} int cc_config_set_boolean */
+
+static int cc_config_add_match_dstype (int *dstype_ret, /* {{{ */
+ oconfig_item_t *ci)
+{
+ int dstype;
+
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("curl plugin: `DSType' needs exactly one string argument.");
+ return (-1);
+ }
+
+ if (strncasecmp ("Gauge", ci->values[0].value.string,
+ strlen ("Gauge")) == 0)
+ {
+ dstype = UTILS_MATCH_DS_TYPE_GAUGE;
+ if (strcasecmp ("GaugeAverage", ci->values[0].value.string) == 0)
+ dstype |= UTILS_MATCH_CF_GAUGE_AVERAGE;
+ else if (strcasecmp ("GaugeMin", ci->values[0].value.string) == 0)
+ dstype |= UTILS_MATCH_CF_GAUGE_MIN;
+ else if (strcasecmp ("GaugeMax", ci->values[0].value.string) == 0)
+ dstype |= UTILS_MATCH_CF_GAUGE_MAX;
+ else if (strcasecmp ("GaugeLast", ci->values[0].value.string) == 0)
+ dstype |= UTILS_MATCH_CF_GAUGE_LAST;
+ else
+ dstype = 0;
+ }
+ else if (strncasecmp ("Counter", ci->values[0].value.string,
+ strlen ("Counter")) == 0)
+ {
+ dstype = UTILS_MATCH_DS_TYPE_COUNTER;
+ if (strcasecmp ("CounterSet", ci->values[0].value.string) == 0)
+ dstype |= UTILS_MATCH_CF_COUNTER_SET;
+ else if (strcasecmp ("CounterAdd", ci->values[0].value.string) == 0)
+ dstype |= UTILS_MATCH_CF_COUNTER_ADD;
+ else if (strcasecmp ("CounterInc", ci->values[0].value.string) == 0)
+ dstype |= UTILS_MATCH_CF_COUNTER_INC;
+ else
+ dstype = 0;
+ }
+ else
+ {
+ dstype = 0;
+ }
+
+ if (dstype == 0)
+ {
+ WARNING ("curl plugin: `%s' is not a valid argument to `DSType'.",
+ ci->values[0].value.string);
+ return (-1);
+ }
+
+ *dstype_ret = dstype;
+ return (0);
+} /* }}} int cc_config_add_match_dstype */
+
+static int cc_config_add_match (web_page_t *page, /* {{{ */
+ oconfig_item_t *ci)
+{
+ web_match_t *match;
+ int status;
+ int i;
+
+ if (ci->values_num != 0)
+ {
+ WARNING ("curl plugin: Ignoring arguments for the `Match' block.");
+ }
+
+ match = (web_match_t *) malloc (sizeof (*match));
+ if (match == NULL)
+ {
+ ERROR ("curl plugin: malloc failed.");
+ return (-1);
+ }
+ memset (match, 0, sizeof (*match));
+
+ status = 0;
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("Regex", child->key) == 0)
+ status = cc_config_add_string ("Regex", &match->regex, child);
+ else if (strcasecmp ("DSType", child->key) == 0)
+ status = cc_config_add_match_dstype (&match->dstype, child);
+ else if (strcasecmp ("Type", child->key) == 0)
+ status = cc_config_add_string ("Type", &match->type, child);
+ else if (strcasecmp ("Instance", child->key) == 0)
+ status = cc_config_add_string ("Instance", &match->instance, child);
+ else
+ {
+ WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
+ status = -1;
+ }
+
+ if (status != 0)
+ break;
+ } /* for (i = 0; i < ci->children_num; i++) */
+
+ while (status == 0)
+ {
+ if (match->regex == NULL)
+ {
+ WARNING ("curl plugin: `Regex' missing in `Match' block.");
+ status = -1;
+ }
+
+ if (match->type == NULL)
+ {
+ WARNING ("curl plugin: `Type' missing in `Match' block.");
+ status = -1;
+ }
+
+ if (match->dstype == 0)
+ {
+ WARNING ("curl plugin: `DSType' missing in `Match' block.");
+ status = -1;
+ }
+
+ break;
+ } /* while (status == 0) */
+
+ if (status != 0)
+ return (status);
+
+ match->match = match_create_simple (match->regex, match->dstype);
+ if (match->match == NULL)
+ {
+ ERROR ("curl plugin: tail_match_add_match_simple failed.");
+ cc_web_match_free (match);
+ return (-1);
+ }
+ else
+ {
+ web_match_t *prev;
+
+ prev = page->matches;
+ while ((prev != NULL) && (prev->next != NULL))
+ prev = prev->next;
+
+ if (prev == NULL)
+ page->matches = match;
+ else
+ prev->next = match;
+ }
+
+ return (0);
+} /* }}} int cc_config_add_match */
+
+static int cc_page_init_curl (web_page_t *wp) /* {{{ */
+{
+ wp->curl = curl_easy_init ();
+ if (wp->curl == NULL)
+ {
+ ERROR ("curl plugin: curl_easy_init failed.");
+ return (-1);
+ }
+
+ curl_easy_setopt (wp->curl, CURLOPT_WRITEFUNCTION, cc_curl_callback);
+ curl_easy_setopt (wp->curl, CURLOPT_WRITEDATA, wp);
+ curl_easy_setopt (wp->curl, CURLOPT_USERAGENT,
+ PACKAGE_NAME"/"PACKAGE_VERSION);
+ curl_easy_setopt (wp->curl, CURLOPT_ERRORBUFFER, wp->curl_errbuf);
+ curl_easy_setopt (wp->curl, CURLOPT_URL, wp->url);
+
+ if (wp->user != NULL)
+ {
+ size_t credentials_size;
+
+ credentials_size = strlen (wp->user) + 2;
+ if (wp->pass != NULL)
+ credentials_size += strlen (wp->pass);
+
+ wp->credentials = (char *) malloc (credentials_size);
+ if (wp->credentials == NULL)
+ {
+ ERROR ("curl plugin: malloc failed.");
+ return (-1);
+ }
+
+ ssnprintf (wp->credentials, credentials_size, "%s:%s",
+ wp->user, (wp->pass == NULL) ? "" : wp->pass);
+ curl_easy_setopt (wp->curl, CURLOPT_USERPWD, wp->credentials);
+ }
+
+ curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYPEER, wp->verify_peer);
+ curl_easy_setopt (wp->curl, CURLOPT_SSL_VERIFYHOST,
+ wp->verify_host ? 2 : 0);
+ if (wp->cacert != NULL)
+ curl_easy_setopt (wp->curl, CURLOPT_CAINFO, wp->cacert);
+
+ return (0);
+} /* }}} int cc_page_init_curl */
+
+static int cc_config_add_page (oconfig_item_t *ci) /* {{{ */
+{
+ web_page_t *page;
+ int status;
+ int i;
+
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("curl plugin: `Page' blocks need exactly one string argument.");
+ return (-1);
+ }
+
+ page = (web_page_t *) malloc (sizeof (*page));
+ if (page == NULL)
+ {
+ ERROR ("curl plugin: malloc failed.");
+ return (-1);
+ }
+ memset (page, 0, sizeof (*page));
+
+ page->instance = strdup (ci->values[0].value.string);
+ if (page->instance == NULL)
+ {
+ ERROR ("curl plugin: strdup failed.");
+ sfree (page);
+ return (-1);
+ }
+
+ /* Process all children */
+ status = 0;
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("URL", child->key) == 0)
+ status = cc_config_add_string ("URL", &page->url, child);
+ else if (strcasecmp ("User", child->key) == 0)
+ status = cc_config_add_string ("User", &page->user, child);
+ else if (strcasecmp ("Password", child->key) == 0)
+ status = cc_config_add_string ("Password", &page->pass, child);
+ else if (strcasecmp ("VerifyPeer", child->key) == 0)
+ status = cc_config_set_boolean ("VerifyPeer", &page->verify_peer, child);
+ else if (strcasecmp ("VerifyHost", child->key) == 0)
+ status = cc_config_set_boolean ("VerifyHost", &page->verify_host, child);
+ else if (strcasecmp ("CACert", child->key) == 0)
+ status = cc_config_add_string ("CACert", &page->cacert, child);
+ else if (strcasecmp ("Match", child->key) == 0)
+ /* Be liberal with failing matches => don't set `status'. */
+ cc_config_add_match (page, child);
+ else
+ {
+ WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
+ status = -1;
+ }
+
+ if (status != 0)
+ break;
+ } /* for (i = 0; i < ci->children_num; i++) */
+
+ /* Additionial sanity checks and libCURL initialization. */
+ while (status == 0)
+ {
+ if (page->url == NULL)
+ {
+ WARNING ("curl plugin: `URL' missing in `Page' block.");
+ status = -1;
+ }
+
+ if (page->matches == NULL)
+ {
+ assert (page->instance != NULL);
+ WARNING ("curl plugin: No (valid) `Match' block "
+ "within `Page' block `%s'.", page->instance);
+ status = -1;
+ }
+
+ if (status == 0)
+ status = cc_page_init_curl (page);
+
+ break;
+ } /* while (status == 0) */
+
+ if (status != 0)
+ {
+ cc_web_page_free (page);
+ return (status);
+ }
+
+ /* Add the new page to the linked list */
+ if (pages_g == NULL)
+ pages_g = page;
+ else
+ {
+ web_page_t *prev;
+
+ prev = pages_g;
+ while ((prev != NULL) && (prev->next != NULL))
+ prev = prev->next;
+ prev->next = page;
+ }
+
+ return (0);
+} /* }}} int cc_config_add_page */
+
+static int cc_config (oconfig_item_t *ci) /* {{{ */
+{
+ int success;
+ int errors;
+ int status;
+ int i;
+
+ success = 0;
+ errors = 0;
+
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("Page", child->key) == 0)
+ {
+ status = cc_config_add_page (child);
+ if (status == 0)
+ success++;
+ else
+ errors++;
+ }
+ else
+ {
+ WARNING ("curl plugin: Option `%s' not allowed here.", child->key);
+ errors++;
+ }
+ }
+
+ if ((success == 0) && (errors > 0))
+ {
+ ERROR ("curl plugin: All statements failed.");
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int cc_config */
+
+static int cc_init (void) /* {{{ */
+{
+ if (pages_g == NULL)
+ {
+ INFO ("curl plugin: No pages have been defined.");
+ return (-1);
+ }
+ return (0);
+} /* }}} int cc_init */
+
+static void cc_submit (const web_page_t *wp, const web_match_t *wm, /* {{{ */
+ const cu_match_value_t *mv)
+{
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
+
+ values[0] = mv->value;
+
+ vl.values = values;
+ vl.values_len = 1;
+ vl.time = time (NULL);
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "curl", sizeof (vl.plugin));
+ sstrncpy (vl.plugin_instance, wp->instance, sizeof (vl.plugin_instance));
+ sstrncpy (vl.type, wm->type, sizeof (vl.type));
+ sstrncpy (vl.type_instance, wm->instance, sizeof (vl.type_instance));
+
+ plugin_dispatch_values (&vl);
+} /* }}} void cc_submit */
+
+static int cc_read_page (web_page_t *wp) /* {{{ */
+{
+ web_match_t *wm;
+ int status;
+
+ wp->buffer_fill = 0;
+ status = curl_easy_perform (wp->curl);
+ if (status != 0)
+ {
+ ERROR ("curl plugin: curl_easy_perform failed with staus %i: %s",
+ status, wp->curl_errbuf);
+ return (-1);
+ }
+
+ for (wm = wp->matches; wm != NULL; wm = wm->next)
+ {
+ cu_match_value_t *mv;
+
+ status = match_apply (wm->match, wp->buffer);
+ if (status != 0)
+ {
+ WARNING ("curl plugin: match_apply failed.");
+ continue;
+ }
+
+ mv = match_get_user_data (wm->match);
+ if (mv == NULL)
+ {
+ WARNING ("curl plugin: match_get_user_data returned NULL.");
+ continue;
+ }
+
+ cc_submit (wp, wm, mv);
+ } /* for (wm = wp->matches; wm != NULL; wm = wm->next) */
+
+ return (0);
+} /* }}} int cc_read_page */
+
+static int cc_read (void) /* {{{ */
+{
+ web_page_t *wp;
+
+ for (wp = pages_g; wp != NULL; wp = wp->next)
+ cc_read_page (wp);
+
+ return (0);
+} /* }}} int cc_read */
+
+static int cc_shutdown (void) /* {{{ */
+{
+ cc_web_page_free (pages_g);
+ pages_g = NULL;
+
+ return (0);
+} /* }}} int cc_shutdown */
+
+void module_register (void)
+{
+ plugin_register_complex_config ("curl", cc_config);
+ plugin_register_init ("curl", cc_init);
+ plugin_register_read ("curl", cc_read);
+ plugin_register_shutdown ("curl", cc_shutdown);
+} /* void module_register */
+
+/* vim: set sw=2 sts=2 et fdm=marker : */
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