--- /dev/null
+/**
+ * collectd - src/write_http.c
+ * Copyright (C) 2009 Paul Sadauskas
+ * Copyright (C) 2009 Doug MacEachern
+ * Copyright (C) 2007-2009 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>
+ * Doug MacEachern <dougm@hyperic.com>
+ * Paul Sadauskas <psadauskas@gmail.com>
+ **/
+
+#include "collectd.h"
+#include "plugin.h"
+#include "common.h"
+#include "utils_cache.h"
+#include "utils_parse_option.h"
+
+#if HAVE_PTHREAD_H
+# include <pthread.h>
+#endif
+
+#include <curl/curl.h>
+
+/*
+ * Private variables
+ */
+struct wh_callback_s
+{
+ char *location;
+
+ char *user;
+ char *pass;
+ char *credentials;
+ int verify_peer;
+ int verify_host;
+ char *cacert;
+
+ CURL *curl;
+ char curl_errbuf[CURL_ERROR_SIZE];
+
+ char send_buffer[4096];
+ size_t send_buffer_free;
+ size_t send_buffer_fill;
+ time_t send_buffer_init_time;
+
+ pthread_mutex_t send_lock;
+};
+typedef struct wh_callback_s wh_callback_t;
+
+static void wh_reset_buffer (wh_callback_t *cb) /* {{{ */
+{
+ memset (cb->send_buffer, 0, sizeof (cb->send_buffer));
+ cb->send_buffer_free = sizeof (cb->send_buffer);
+ cb->send_buffer_fill = 0;
+ cb->send_buffer_init_time = time (NULL);
+} /* }}} wh_reset_buffer */
+
+static int wh_send_buffer (wh_callback_t *cb) /* {{{ */
+{
+ int status = 0;
+
+ curl_easy_setopt (cb->curl, CURLOPT_POSTFIELDS, cb->send_buffer);
+ status = curl_easy_perform (cb->curl);
+ if (status != 0)
+ {
+ ERROR ("write_http plugin: curl_easy_perform failed with "
+ "staus %i: %s",
+ status, cb->curl_errbuf);
+ }
+ return (status);
+} /* }}} wh_send_buffer */
+
+static int wh_callback_init (wh_callback_t *cb) /* {{{ */
+{
+ struct curl_slist *headers;
+
+ if (cb->curl != NULL)
+ return (0);
+
+ cb->curl = curl_easy_init ();
+ if (cb->curl == NULL)
+ {
+ ERROR ("curl plugin: curl_easy_init failed.");
+ return (-1);
+ }
+
+ curl_easy_setopt (cb->curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
+
+ headers = NULL;
+ headers = curl_slist_append (headers, "Accept: */*");
+ headers = curl_slist_append (headers, "Content-Type: text/plain");
+ curl_easy_setopt (cb->curl, CURLOPT_HTTPHEADER, headers);
+
+ curl_easy_setopt (cb->curl, CURLOPT_ERRORBUFFER, cb->curl_errbuf);
+ curl_easy_setopt (cb->curl, CURLOPT_URL, cb->location);
+
+ if (cb->user != NULL)
+ {
+ size_t credentials_size;
+
+ credentials_size = strlen (cb->user) + 2;
+ if (cb->pass != NULL)
+ credentials_size += strlen (cb->pass);
+
+ cb->credentials = (char *) malloc (credentials_size);
+ if (cb->credentials == NULL)
+ {
+ ERROR ("curl plugin: malloc failed.");
+ return (-1);
+ }
+
+ ssnprintf (cb->credentials, credentials_size, "%s:%s",
+ cb->user, (cb->pass == NULL) ? "" : cb->pass);
+ curl_easy_setopt (cb->curl, CURLOPT_USERPWD, cb->credentials);
+ curl_easy_setopt (cb->curl, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
+ }
+
+ curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYPEER, cb->verify_peer);
+ curl_easy_setopt (cb->curl, CURLOPT_SSL_VERIFYHOST,
+ cb->verify_host ? 2 : 0);
+ if (cb->cacert != NULL)
+ curl_easy_setopt (cb->curl, CURLOPT_CAINFO, cb->cacert);
+
+ wh_reset_buffer (cb);
+
+ return (0);
+} /* }}} int wh_callback_init */
+
+static int wh_flush_nolock (int timeout, wh_callback_t *cb) /* {{{ */
+{
+ int status;
+
+ DEBUG ("write_http plugin: wh_flush_nolock: timeout = %i; "
+ "send_buffer_fill = %zu;",
+ timeout, cb->send_buffer_fill);
+
+ if (timeout > 0)
+ {
+ time_t now;
+
+ now = time (NULL);
+ if ((cb->send_buffer_init_time + timeout) > now)
+ return (0);
+ }
+
+ if (cb->send_buffer_fill <= 0)
+ {
+ cb->send_buffer_init_time = time (NULL);
+ return (0);
+ }
+
+ status = wh_send_buffer (cb);
+ wh_reset_buffer (cb);
+
+ return (status);
+} /* }}} wh_flush_nolock */
+
+static int wh_flush (int timeout, /* {{{ */
+ const char *identifier __attribute__((unused)),
+ user_data_t *user_data)
+{
+ wh_callback_t *cb;
+ int status;
+
+ if (user_data == NULL)
+ return (-EINVAL);
+
+ cb = user_data->data;
+
+ pthread_mutex_lock (&cb->send_lock);
+
+ if (cb->curl == NULL)
+ {
+ status = wh_callback_init (cb);
+ if (status != 0)
+ {
+ ERROR ("write_http plugin: wh_callback_init failed.");
+ pthread_mutex_unlock (&cb->send_lock);
+ return (-1);
+ }
+ }
+
+ status = wh_flush_nolock (timeout, cb);
+ pthread_mutex_unlock (&cb->send_lock);
+
+ return (status);
+} /* }}} int wh_flush */
+
+static void wh_callback_free (void *data) /* {{{ */
+{
+ wh_callback_t *cb;
+
+ if (data == NULL)
+ return;
+
+ cb = data;
+
+ wh_flush_nolock (/* timeout = */ -1, cb);
+
+ curl_easy_cleanup (cb->curl);
+ sfree (cb->location);
+ sfree (cb->user);
+ sfree (cb->pass);
+ sfree (cb->credentials);
+ sfree (cb->cacert);
+
+ sfree (cb);
+} /* }}} void wh_callback_free */
+
+static int wh_value_list_to_string (char *buffer, /* {{{ */
+ size_t buffer_size,
+ const data_set_t *ds, const value_list_t *vl)
+{
+ size_t offset = 0;
+ int status;
+ int i;
+
+ assert (0 == strcmp (ds->type, vl->type));
+
+ memset (buffer, 0, buffer_size);
+
+#define BUFFER_ADD(...) do { \
+ status = ssnprintf (buffer + offset, buffer_size - offset, \
+ __VA_ARGS__); \
+ if (status < 1) \
+ return (-1); \
+ else if (((size_t) status) >= (buffer_size - offset)) \
+ return (-1); \
+ else \
+ offset += ((size_t) status); \
+} while (0)
+
+ BUFFER_ADD ("%lu", (unsigned long) vl->time);
+
+ for (i = 0; i < ds->ds_num; i++)
+{
+ if (ds->ds[i].type == DS_TYPE_GAUGE)
+ BUFFER_ADD (":%f", vl->values[i].gauge);
+ else if (ds->ds[i].type == DS_TYPE_COUNTER)
+ BUFFER_ADD (":%llu", vl->values[i].counter);
+ else if (ds->ds[i].type == DS_TYPE_DERIVE)
+ BUFFER_ADD (":%"PRIi64, vl->values[i].derive);
+ else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
+ BUFFER_ADD (":%"PRIu64, vl->values[i].absolute);
+ else
+ {
+ ERROR ("write_http plugin: Unknown data source type: %i",
+ ds->ds[i].type);
+ return (-1);
+ }
+} /* for ds->ds_num */
+
+#undef BUFFER_ADD
+
+return (0);
+} /* }}} int wh_value_list_to_string */
+
+static int wh_write_command (const data_set_t *ds, const value_list_t *vl, /* {{{ */
+ wh_callback_t *cb)
+{
+ char key[10*DATA_MAX_NAME_LEN];
+ char values[512];
+ char command[1024];
+ size_t command_len;
+
+ int status;
+
+ if (0 != strcmp (ds->type, vl->type)) {
+ ERROR ("write_http plugin: DS type does not match "
+ "value list type");
+ return -1;
+ }
+
+ /* Copy the identifier to `key' and escape it. */
+ status = FORMAT_VL (key, sizeof (key), vl);
+ if (status != 0) {
+ ERROR ("write_http plugin: error with format_name");
+ return (status);
+ }
+ escape_string (key, sizeof (key));
+
+ /* Convert the values to an ASCII representation and put that into
+ * `values'. */
+ status = wh_value_list_to_string (values, sizeof (values), ds, vl);
+ if (status != 0) {
+ ERROR ("write_http plugin: error with "
+ "wh_value_list_to_string");
+ return (status);
+ }
+
+ command_len = (size_t) ssnprintf (command, sizeof (command),
+ "PUTVAL %s interval=%i %s\n",
+ key, vl->interval, values);
+ if (command_len >= sizeof (command)) {
+ ERROR ("write_http plugin: Command buffer too small: "
+ "Need %zu bytes.", command_len + 1);
+ return (-1);
+ }
+
+ pthread_mutex_lock (&cb->send_lock);
+
+ if (cb->curl == NULL)
+ {
+ status = wh_callback_init (cb);
+ if (status != 0)
+ {
+ ERROR ("write_http plugin: wh_callback_init failed.");
+ pthread_mutex_unlock (&cb->send_lock);
+ return (-1);
+ }
+ }
+
+ if (command_len >= cb->send_buffer_free)
+ {
+ status = wh_flush_nolock (/* timeout = */ -1, cb);
+ if (status != 0)
+ {
+ pthread_mutex_unlock (&cb->send_lock);
+ return (status);
+ }
+ }
+ assert (command_len < cb->send_buffer_free);
+
+ /* `command_len + 1' because `command_len' does not include the
+ * trailing null byte. Neither does `send_buffer_fill'. */
+ memcpy (cb->send_buffer + cb->send_buffer_fill,
+ command, command_len + 1);
+ cb->send_buffer_fill += command_len;
+ cb->send_buffer_free -= command_len;
+
+ DEBUG ("write_http plugin: <%s> buffer %zu/%zu (%g%%) \"%s\"",
+ cb->location,
+ cb->send_buffer_fill, sizeof (cb->send_buffer),
+ 100.0 * ((double) cb->send_buffer_fill) / ((double) sizeof (cb->send_buffer)),
+ command);
+
+ /* Check if we have enough space for this command. */
+ pthread_mutex_unlock (&cb->send_lock);
+
+ return (0);
+} /* }}} int wh_write_command */
+
+static int wh_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
+ user_data_t *user_data)
+{
+ wh_callback_t *cb;
+ int status;
+
+ if (user_data == NULL)
+ return (-EINVAL);
+
+ cb = user_data->data;
+
+ status = wh_write_command (ds, vl, cb);
+ return (status);
+} /* }}} int wh_write */
+
+static int config_set_string (char **ret_string, /* {{{ */
+ oconfig_item_t *ci)
+{
+ char *string;
+
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("write_http 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 ("write_http plugin: strdup failed.");
+ return (-1);
+ }
+
+ if (*ret_string != NULL)
+ free (*ret_string);
+ *ret_string = string;
+
+ return (0);
+} /* }}} int config_set_string */
+
+static int config_set_boolean (int *dest, oconfig_item_t *ci) /* {{{ */
+{
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
+ {
+ WARNING ("write_http plugin: The `%s' config option "
+ "needs exactly one boolean argument.", ci->key);
+ return (-1);
+ }
+
+ *dest = ci->values[0].value.boolean ? 1 : 0;
+
+ return (0);
+} /* }}} int config_set_boolean */
+
+static int wh_config_url (oconfig_item_t *ci) /* {{{ */
+{
+ wh_callback_t *cb;
+ user_data_t user_data;
+ int i;
+
+ cb = malloc (sizeof (*cb));
+ if (cb == NULL)
+ {
+ ERROR ("write_http plugin: malloc failed.");
+ return (-1);
+ }
+ memset (cb, 0, sizeof (*cb));
+ cb->location = NULL;
+ cb->user = NULL;
+ cb->pass = NULL;
+ cb->credentials = NULL;
+ cb->verify_peer = 1;
+ cb->verify_host = 1;
+ cb->cacert = NULL;
+ cb->curl = NULL;
+
+ pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
+
+ config_set_string (&cb->location, ci);
+ if (cb->location == NULL)
+ return (-1);
+
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("User", child->key) == 0)
+ config_set_string (&cb->user, child);
+ else if (strcasecmp ("Password", child->key) == 0)
+ config_set_string (&cb->pass, child);
+ else if (strcasecmp ("VerifyPeer", child->key) == 0)
+ config_set_boolean (&cb->verify_peer, child);
+ else if (strcasecmp ("VerifyHost", child->key) == 0)
+ config_set_boolean (&cb->verify_host, child);
+ else if (strcasecmp ("CACert", child->key) == 0)
+ config_set_string (&cb->cacert, child);
+ else
+ {
+ ERROR ("write_http plugin: Invalid configuration "
+ "option: %s.", child->key);
+ }
+ }
+
+ DEBUG ("write_http: Registering write callback with URL %s",
+ cb->location);
+
+ memset (&user_data, 0, sizeof (user_data));
+ user_data.data = cb;
+ user_data.free_func = NULL;
+ plugin_register_flush ("write_http", wh_flush, &user_data);
+
+ user_data.free_func = wh_callback_free;
+ plugin_register_write ("write_http", wh_write, &user_data);
+
+ return (0);
+} /* }}} int wh_config_url */
+
+static int wh_config (oconfig_item_t *ci) /* {{{ */
+{
+ int i;
+
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("URL", child->key) == 0)
+ wh_config_url (child);
+ else
+ {
+ ERROR ("write_http plugin: Invalid configuration "
+ "option: %s.", child->key);
+ }
+ }
+
+ return (0);
+} /* }}} int wh_config */
+
+void module_register (void) /* {{{ */
+{
+ plugin_register_complex_config ("write_http", wh_config);
+} /* }}} void module_register */
+
+/* vim: set fdm=marker sw=8 ts=8 tw=78 et : */
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