2 * collectd - src/http.c
3 * Copyright (C) 2007-2009 Florian octo Forster
4 * Copyright (C) 2009 Doug MacEachern
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Florian octo Forster <octo at verplant.org>
21 * Doug MacEachern <dougm@hyperic.com>
27 #include "utils_cache.h"
28 #include "utils_parse_option.h"
34 #include <curl/curl.h>
39 static const char *config_keys[] =
41 "URL", "User", "Password"
43 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
45 static char *location = NULL;
52 char curl_errbuf[CURL_ERROR_SIZE];
54 #define SEND_BUFFER_SIZE 4096
55 static char send_buffer[SEND_BUFFER_SIZE];
56 static size_t send_buffer_free;
57 static size_t send_buffer_fill;
59 static pthread_mutex_t send_lock = PTHREAD_MUTEX_INITIALIZER;
61 static int http_init(void) /* {{{ */
64 curl = curl_easy_init ();
68 ERROR ("curl plugin: curl_easy_init failed.");
72 struct curl_slist *headers=NULL;
74 curl_easy_setopt (curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
76 headers = curl_slist_append(headers, "Accept: */*");
77 headers = curl_slist_append(headers, "Content-Type: text/plain");
78 curl_easy_setopt (curl, CURLOPT_HTTPHEADER, headers);
80 curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, curl_errbuf);
81 curl_easy_setopt (curl, CURLOPT_URL, location);
85 size_t credentials_size;
87 credentials_size = strlen (user) + 2;
89 credentials_size += strlen (pass);
91 credentials = (char *) malloc (credentials_size);
92 if (credentials == NULL)
94 ERROR ("curl plugin: malloc failed.");
98 ssnprintf (credentials, credentials_size, "%s:%s",
99 user, (pass == NULL) ? "" : pass);
100 curl_easy_setopt (curl, CURLOPT_USERPWD, credentials);
101 curl_easy_setopt (curl, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
107 static int http_value_list_to_string (char *buffer, /* {{{ */
109 const data_set_t *ds, const value_list_t *vl)
115 assert (0 == strcmp (ds->type, vl->type));
117 memset (buffer, 0, buffer_size);
119 #define BUFFER_ADD(...) do { \
120 status = ssnprintf (buffer + offset, buffer_size - offset, \
124 else if (((size_t) status) >= (buffer_size - offset)) \
127 offset += ((size_t) status); \
130 BUFFER_ADD ("%lu", (unsigned long) vl->time);
132 for (i = 0; i < ds->ds_num; i++)
134 if (ds->ds[i].type == DS_TYPE_GAUGE)
135 BUFFER_ADD (":%f", vl->values[i].gauge);
136 else if (ds->ds[i].type == DS_TYPE_COUNTER)
137 BUFFER_ADD (":%llu", vl->values[i].counter);
138 else if (ds->ds[i].type == DS_TYPE_DERIVE)
139 BUFFER_ADD (":%"PRIi64, vl->values[i].derive);
140 else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
141 BUFFER_ADD (":%"PRIu64, vl->values[i].absolute);
144 ERROR ("http plugin: Unknown data source type: %i",
148 } /* for ds->ds_num */
153 } /* }}} int http_value_list_to_string */
155 static int http_config (const char *key, const char *value) /* {{{ */
157 if (strcasecmp ("URL", key) == 0)
159 if (location != NULL)
161 location = strdup (value);
162 if (location != NULL)
164 int len = strlen (location);
165 while ((len > 0) && (location[len - 1] == '/'))
168 location[len] = '\0';
177 else if (strcasecmp ("User", key) == 0)
181 user = strdup (value);
184 int len = strlen (user);
185 while ((len > 0) && (user[len - 1] == '/'))
197 else if (strcasecmp ("Password", key) == 0)
201 pass = strdup (value);
204 int len = strlen (pass);
205 while ((len > 0) && (pass[len - 1] == '/'))
222 } /* }}} int http_config */
224 static void http_init_buffer (void) /* {{{ */
226 memset (send_buffer, 0, sizeof (send_buffer));
227 send_buffer_free = sizeof (send_buffer);
228 send_buffer_fill = 0;
229 } /* }}} http_init_buffer */
231 static int http_send_buffer (char *buffer) /* {{{ */
235 curl_easy_setopt (curl, CURLOPT_POSTFIELDS, buffer);
236 status = curl_easy_perform (curl);
239 ERROR ("http plugin: curl_easy_perform failed with staus %i: %s",
240 status, curl_errbuf);
243 } /* }}} http_send_buffer */
245 static int http_flush_buffer (void) /* {{{ */
248 DEBUG ("http plugin: flushing buffer:\n%s", send_buffer);
250 status = http_send_buffer (send_buffer);
254 } /* }}} http_flush_buffer */
256 static int http_write_command (const data_set_t *ds, const value_list_t *vl) /* {{{ */
258 char key[10*DATA_MAX_NAME_LEN];
265 if (0 != strcmp (ds->type, vl->type)) {
266 ERROR ("http plugin: DS type does not match value list type");
270 /* Copy the identifier to `key' and escape it. */
271 status = FORMAT_VL (key, sizeof (key), vl);
273 ERROR ("http plugin: error with format_name");
276 escape_string (key, sizeof (key));
278 /* Convert the values to an ASCII representation and put that into
280 status = http_value_list_to_string (values, sizeof (values), ds, vl);
282 ERROR ("http plugin: error with http_value_list_to_string");
286 command_len = (size_t) ssnprintf (command, sizeof (command),
287 "PUTVAL %s interval=%i %s\n",
288 key, vl->interval, values);
289 if (command_len >= sizeof (command)) {
290 ERROR ("http plugin: Command buffer too small: "
291 "Need %zu bytes.", command_len + 1);
295 pthread_mutex_lock (&send_lock);
297 /* Check if we have enough space for this command. */
298 if (command_len >= send_buffer_free)
300 status = http_flush_buffer();
303 pthread_mutex_unlock (&send_lock);
307 assert (command_len < send_buffer_free);
309 /* `command_len + 1' because `command_len' does not include the
310 * trailing null byte. Neither does `send_buffer_fill'. */
311 memcpy (send_buffer + send_buffer_fill, command, command_len + 1);
312 send_buffer_fill += command_len;
313 send_buffer_free -= command_len;
315 pthread_mutex_unlock (&send_lock);
318 } /* }}} int http_write_command */
320 static int http_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
321 user_data_t __attribute__((unused)) *user_data)
325 status = http_write_command (ds, vl);
328 } /* }}} int http_write */
330 static int http_shutdown (void) /* {{{ */
333 curl_easy_cleanup(curl);
337 void module_register (void) /* {{{ */
339 plugin_register_init("http", http_init);
340 plugin_register_config ("http", http_config,
341 config_keys, config_keys_num);
342 plugin_register_write ("http", http_write, /* user_data = */ NULL);
343 plugin_register_shutdown("http", http_shutdown);
344 } /* }}} void module_register */
346 /* vim: set fdm=marker sw=8 ts=8 tw=78 et : */