![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/src/write_http.c b/src/write_http.c
--- /dev/null
+++ b/src/write_http.c
@@ -0,0 +1,386 @@
+/**
+ * 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
+ */
+static const char *config_keys[] =
+{
+ "URL", "User", "Password"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+static char *location = NULL;
+
+char *user;
+char *pass;
+char *credentials;
+
+CURL *curl;
+char curl_errbuf[CURL_ERROR_SIZE];
+
+#define SEND_BUFFER_SIZE 4096
+static char send_buffer[SEND_BUFFER_SIZE];
+static size_t send_buffer_free;
+static size_t send_buffer_fill;
+static time_t send_buffer_init_time;
+
+static pthread_mutex_t send_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static void wh_init_buffer (void) /* {{{ */
+{
+ memset (send_buffer, 0, sizeof (send_buffer));
+ send_buffer_free = sizeof (send_buffer);
+ send_buffer_fill = 0;
+ send_buffer_init_time = time (NULL);
+} /* }}} wh_init_buffer */
+
+static int wh_init(void) /* {{{ */
+{
+
+ curl = curl_easy_init ();
+
+ if (curl == NULL)
+ {
+ ERROR ("curl plugin: curl_easy_init failed.");
+ return (-1);
+ }
+
+ struct curl_slist *headers=NULL;
+
+ curl_easy_setopt (curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
+
+ headers = curl_slist_append(headers, "Accept: */*");
+ headers = curl_slist_append(headers, "Content-Type: text/plain");
+ curl_easy_setopt (curl, CURLOPT_HTTPHEADER, headers);
+
+ curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, curl_errbuf);
+ curl_easy_setopt (curl, CURLOPT_URL, location);
+
+ if (user != NULL)
+ {
+ size_t credentials_size;
+
+ credentials_size = strlen (user) + 2;
+ if (pass != NULL)
+ credentials_size += strlen (pass);
+
+ credentials = (char *) malloc (credentials_size);
+ if (credentials == NULL)
+ {
+ ERROR ("curl plugin: malloc failed.");
+ return (-1);
+ }
+
+ ssnprintf (credentials, credentials_size, "%s:%s",
+ user, (pass == NULL) ? "" : pass);
+ curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
+ curl_easy_setopt (curl, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
+ }
+
+ wh_init_buffer ();
+
+ return (0);
+} /* }}} */
+
+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_config (const char *key, const char *value) /* {{{ */
+{
+ if (strcasecmp ("URL", key) == 0)
+ {
+ if (location != NULL)
+ free (location);
+ location = strdup (value);
+ if (location != NULL)
+ {
+ int len = strlen (location);
+ while ((len > 0) && (location[len - 1] == '/'))
+ {
+ len--;
+ location[len] = '\0';
+ }
+ if (len <= 0)
+ {
+ free (location);
+ location = NULL;
+ }
+ }
+ }
+ else if (strcasecmp ("User", key) == 0)
+ {
+ if (user != NULL)
+ free (user);
+ user = strdup (value);
+ if (user != NULL)
+ {
+ int len = strlen (user);
+ while ((len > 0) && (user[len - 1] == '/'))
+ {
+ len--;
+ user[len] = '\0';
+ }
+ if (len <= 0)
+ {
+ free (user);
+ user = NULL;
+ }
+ }
+ }
+ else if (strcasecmp ("Password", key) == 0)
+ {
+ if (pass != NULL)
+ free (pass);
+ pass = strdup (value);
+ if (pass != NULL)
+ {
+ int len = strlen (pass);
+ while ((len > 0) && (pass[len - 1] == '/'))
+ {
+ len--;
+ pass[len] = '\0';
+ }
+ if (len <= 0)
+ {
+ free (pass);
+ pass = NULL;
+ }
+ }
+ }
+ else
+ {
+ return (-1);
+ }
+ return (0);
+} /* }}} int wh_config */
+
+static int wh_send_buffer (char *buffer) /* {{{ */
+{
+ int status = 0;
+
+ curl_easy_setopt (curl, CURLOPT_POSTFIELDS, buffer);
+ status = curl_easy_perform (curl);
+ if (status != 0)
+ {
+ ERROR ("write_http plugin: curl_easy_perform failed with "
+ "staus %i: %s",
+ status, curl_errbuf);
+ }
+ return (status);
+} /* }}} wh_send_buffer */
+
+static int wh_flush_nolock (int timeout) /* {{{ */
+{
+ int status;
+
+ DEBUG ("write_http plugin: wh_flush_nolock: timeout = %i; "
+ "send_buffer =\n %s", timeout, send_buffer);
+
+ if (timeout > 0)
+ {
+ time_t now;
+
+ now = time (NULL);
+ if ((send_buffer_init_time + timeout) > now)
+ return (0);
+ }
+
+ if (send_buffer_fill <= 0)
+ {
+ send_buffer_init_time = time (NULL);
+ return (0);
+ }
+
+ status = wh_send_buffer (send_buffer);
+ wh_init_buffer ();
+
+ return (status);
+} /* }}} wh_flush_nolock */
+
+static int wh_flush (int timeout, /* {{{ */
+ const char *identifier __attribute__((unused)),
+ user_data_t *user_data __attribute__((unused)))
+{
+ int status;
+
+ pthread_mutex_lock (&send_lock);
+ status = wh_flush_nolock (timeout);
+ pthread_mutex_unlock (&send_lock);
+
+ return (status);
+} /* }}} int wh_flush */
+
+static int wh_write_command (const data_set_t *ds, const value_list_t *vl) /* {{{ */
+{
+ 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 (&send_lock);
+
+ /* Check if we have enough space for this command. */
+ if (command_len >= send_buffer_free)
+ {
+ status = wh_flush_nolock (/* timeout = */ -1);
+ if (status != 0)
+ {
+ pthread_mutex_unlock (&send_lock);
+ return status;
+ }
+ }
+ assert (command_len < send_buffer_free);
+
+ /* `command_len + 1' because `command_len' does not include the
+ * trailing null byte. Neither does `send_buffer_fill'. */
+ memcpy (send_buffer + send_buffer_fill, command, command_len + 1);
+ send_buffer_fill += command_len;
+ send_buffer_free -= command_len;
+
+ pthread_mutex_unlock (&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 __attribute__((unused)) *user_data)
+{
+ int status;
+
+ status = wh_write_command (ds, vl);
+
+ return (status);
+} /* }}} int wh_write */
+
+static int wh_shutdown (void) /* {{{ */
+{
+ wh_flush_nolock (/* timeout = */ -1);
+ curl_easy_cleanup(curl);
+ return (0);
+} /* }}} int wh_shutdown */
+
+void module_register (void) /* {{{ */
+{
+ plugin_register_init("write_http", wh_init);
+ plugin_register_config ("write_http", wh_config,
+ config_keys, config_keys_num);
+ plugin_register_write ("write_http", wh_write, /* user_data = */ NULL);
+ plugin_register_flush ("write_http", wh_flush, /* user_data = */ NULL);
+ plugin_register_shutdown("write_http", wh_shutdown);
+} /* }}} void module_register */
+
+/* vim: set fdm=marker sw=8 ts=8 tw=78 et : */