1 /*****************************************************************************
2 *
3 * Nagios check_http plugin
4 *
5 * License: GPL
6 * Copyright (c) 1999-2008 Nagios Plugins Development Team
7 *
8 * Last Modified: $Date$
9 *
10 * Description:
11 *
12 * This file contains the check_http plugin
13 *
14 * This plugin tests the HTTP service on the specified host. It can test
15 * normal (http) and secure (https) servers, follow redirects, search for
16 * strings and regular expressions, check connection times, and report on
17 * certificate expiration times.
18 *
19 *
20 * This program is free software: you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation, either version 3 of the License, or
23 * (at your option) any later version.
24 *
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
29 *
30 * You should have received a copy of the GNU General Public License
31 * along with this program. If not, see <http://www.gnu.org/licenses/>.
32 *
33 * $Id$
34 *
35 *****************************************************************************/
37 /* splint -I. -I../../plugins -I../../lib/ -I/usr/kerberos/include/ ../../plugins/check_http.c */
39 const char *progname = "check_http";
40 const char *revision = "$Revision$";
41 const char *copyright = "1999-2008";
42 const char *email = "nagiosplug-devel@lists.sourceforge.net";
44 #include "common.h"
45 #include "netutils.h"
46 #include "utils.h"
47 #include "base64.h"
48 #include <ctype.h>
50 #define INPUT_DELIMITER ";"
52 #define HTTP_EXPECT "HTTP/1."
53 enum {
54 MAX_IPV4_HOSTLENGTH = 255,
55 HTTP_PORT = 80,
56 HTTPS_PORT = 443,
57 MAX_PORT = 65535
58 };
60 #ifdef HAVE_SSL
61 int check_cert = FALSE;
62 int days_till_exp;
63 char *randbuff;
64 X509 *server_cert;
65 # define my_recv(buf, len) ((use_ssl) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
66 # define my_send(buf, len) ((use_ssl) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
67 #else /* ifndef HAVE_SSL */
68 # define my_recv(buf, len) read(sd, buf, len)
69 # define my_send(buf, len) send(sd, buf, len, 0)
70 #endif /* HAVE_SSL */
71 int no_body = FALSE;
72 int maximum_age = -1;
74 enum {
75 REGS = 2,
76 MAX_RE_SIZE = 256
77 };
78 #include "regex.h"
79 regex_t preg;
80 regmatch_t pmatch[REGS];
81 char regexp[MAX_RE_SIZE];
82 char errbuf[MAX_INPUT_BUFFER];
83 int cflags = REG_NOSUB | REG_EXTENDED | REG_NEWLINE;
84 int errcode;
85 int invert_regex = 0;
87 struct timeval tv;
89 #define HTTP_URL "/"
90 #define CRLF "\r\n"
92 int specify_port = FALSE;
93 int server_port = HTTP_PORT;
94 char server_port_text[6] = "";
95 char server_type[6] = "http";
96 char *server_address;
97 char *host_name;
98 char *server_url;
99 char *user_agent;
100 int server_url_length;
101 int server_expect_yn = 0;
102 char server_expect[MAX_INPUT_BUFFER] = HTTP_EXPECT;
103 char string_expect[MAX_INPUT_BUFFER] = "";
104 double warning_time = 0;
105 int check_warning_time = FALSE;
106 double critical_time = 0;
107 int check_critical_time = FALSE;
108 char user_auth[MAX_INPUT_BUFFER] = "";
109 int display_html = FALSE;
110 char **http_opt_headers;
111 int http_opt_headers_count = 0;
112 int onredirect = STATE_OK;
113 int use_ssl = FALSE;
114 int verbose = FALSE;
115 int sd;
116 int min_page_len = 0;
117 int max_page_len = 0;
118 int redir_depth = 0;
119 int max_depth = 15;
120 char *http_method;
121 char *http_post_data;
122 char *http_content_type;
123 char buffer[MAX_INPUT_BUFFER];
125 int process_arguments (int, char **);
126 int check_http (void);
127 void redir (char *pos, char *status_line);
128 int server_type_check(const char *type);
129 int server_port_check(int ssl_flag);
130 char *perfd_time (double microsec);
131 char *perfd_size (int page_len);
132 void print_help (void);
133 void print_usage (void);
135 int
136 main (int argc, char **argv)
137 {
138 int result = STATE_UNKNOWN;
140 setlocale (LC_ALL, "");
141 bindtextdomain (PACKAGE, LOCALEDIR);
142 textdomain (PACKAGE);
144 /* Set default URL. Must be malloced for subsequent realloc if --onredirect=follow */
145 server_url = strdup(HTTP_URL);
146 server_url_length = strlen(server_url);
147 asprintf (&user_agent, "User-Agent: check_http/%s (nagios-plugins %s)",
148 clean_revstring (revision), VERSION);
150 /* Parse extra opts if any */
151 argv=np_extra_opts (&argc, argv, progname);
153 if (process_arguments (argc, argv) == ERROR)
154 usage4 (_("Could not parse arguments"));
156 if (display_html == TRUE)
157 printf ("<A HREF=\"%s://%s:%d%s\" target=\"_blank\">",
158 use_ssl ? "https" : "http", host_name ? host_name : server_address,
159 server_port, server_url);
161 /* initialize alarm signal handling, set socket timeout, start timer */
162 (void) signal (SIGALRM, socket_timeout_alarm_handler);
163 (void) alarm (socket_timeout);
164 gettimeofday (&tv, NULL);
166 result = check_http ();
167 return result;
168 }
172 /* process command-line arguments */
173 int
174 process_arguments (int argc, char **argv)
175 {
176 int c = 1;
177 char *p;
179 enum {
180 INVERT_REGEX = CHAR_MAX + 1
181 };
183 int option = 0;
184 static struct option longopts[] = {
185 STD_LONG_OPTS,
186 {"link", no_argument, 0, 'L'},
187 {"nohtml", no_argument, 0, 'n'},
188 {"ssl", no_argument, 0, 'S'},
189 {"post", required_argument, 0, 'P'},
190 {"IP-address", required_argument, 0, 'I'},
191 {"url", required_argument, 0, 'u'},
192 {"port", required_argument, 0, 'p'},
193 {"authorization", required_argument, 0, 'a'},
194 {"string", required_argument, 0, 's'},
195 {"expect", required_argument, 0, 'e'},
196 {"regex", required_argument, 0, 'r'},
197 {"ereg", required_argument, 0, 'r'},
198 {"eregi", required_argument, 0, 'R'},
199 {"linespan", no_argument, 0, 'l'},
200 {"onredirect", required_argument, 0, 'f'},
201 {"certificate", required_argument, 0, 'C'},
202 {"useragent", required_argument, 0, 'A'},
203 {"header", required_argument, 0, 'k'},
204 {"no-body", no_argument, 0, 'N'},
205 {"max-age", required_argument, 0, 'M'},
206 {"content-type", required_argument, 0, 'T'},
207 {"pagesize", required_argument, 0, 'm'},
208 {"invert-regex", no_argument, NULL, INVERT_REGEX},
209 {"use-ipv4", no_argument, 0, '4'},
210 {"use-ipv6", no_argument, 0, '6'},
211 {0, 0, 0, 0}
212 };
214 if (argc < 2)
215 return ERROR;
217 for (c = 1; c < argc; c++) {
218 if (strcmp ("-to", argv[c]) == 0)
219 strcpy (argv[c], "-t");
220 if (strcmp ("-hn", argv[c]) == 0)
221 strcpy (argv[c], "-H");
222 if (strcmp ("-wt", argv[c]) == 0)
223 strcpy (argv[c], "-w");
224 if (strcmp ("-ct", argv[c]) == 0)
225 strcpy (argv[c], "-c");
226 if (strcmp ("-nohtml", argv[c]) == 0)
227 strcpy (argv[c], "-n");
228 }
230 while (1) {
231 c = getopt_long (argc, argv, "Vvh46t:c:w:A:k:H:P:T:I:a:e:p:s:R:r:u:f:C:nlLSm:M:N", longopts, &option);
232 if (c == -1 || c == EOF)
233 break;
235 switch (c) {
236 case '?': /* usage */
237 usage5 ();
238 break;
239 case 'h': /* help */
240 print_help ();
241 exit (STATE_OK);
242 break;
243 case 'V': /* version */
244 print_revision (progname, revision);
245 exit (STATE_OK);
246 break;
247 case 't': /* timeout period */
248 if (!is_intnonneg (optarg))
249 usage2 (_("Timeout interval must be a positive integer"), optarg);
250 else
251 socket_timeout = atoi (optarg);
252 break;
253 case 'c': /* critical time threshold */
254 if (!is_nonnegative (optarg))
255 usage2 (_("Critical threshold must be integer"), optarg);
256 else {
257 critical_time = strtod (optarg, NULL);
258 check_critical_time = TRUE;
259 }
260 break;
261 case 'w': /* warning time threshold */
262 if (!is_nonnegative (optarg))
263 usage2 (_("Warning threshold must be integer"), optarg);
264 else {
265 warning_time = strtod (optarg, NULL);
266 check_warning_time = TRUE;
267 }
268 break;
269 case 'A': /* User Agent String */
270 asprintf (&user_agent, "User-Agent: %s", optarg);
271 break;
272 case 'k': /* Additional headers */
273 if (http_opt_headers_count == 0)
274 http_opt_headers = malloc (sizeof (char *) * (++http_opt_headers_count));
275 else
276 http_opt_headers = realloc (http_opt_headers, sizeof (char *) * (++http_opt_headers_count));
277 http_opt_headers[http_opt_headers_count - 1] = optarg;
278 /* asprintf (&http_opt_headers, "%s", optarg); */
279 break;
280 case 'L': /* show html link */
281 display_html = TRUE;
282 break;
283 case 'n': /* do not show html link */
284 display_html = FALSE;
285 break;
286 case 'C': /* Check SSL cert validity */
287 #ifdef HAVE_SSL
288 if (!is_intnonneg (optarg))
289 usage2 (_("Invalid certificate expiration period"), optarg);
290 else {
291 days_till_exp = atoi (optarg);
292 check_cert = TRUE;
293 }
294 /* Fall through to -S option */
295 #endif
296 case 'S': /* use SSL */
297 #ifndef HAVE_SSL
298 usage4 (_("Invalid option - SSL is not available"));
299 #endif
300 use_ssl = TRUE;
301 if (specify_port == FALSE)
302 server_port = HTTPS_PORT;
303 break;
304 case 'f': /* onredirect */
305 if (!strcmp (optarg, "follow"))
306 onredirect = STATE_DEPENDENT;
307 if (!strcmp (optarg, "unknown"))
308 onredirect = STATE_UNKNOWN;
309 if (!strcmp (optarg, "ok"))
310 onredirect = STATE_OK;
311 if (!strcmp (optarg, "warning"))
312 onredirect = STATE_WARNING;
313 if (!strcmp (optarg, "critical"))
314 onredirect = STATE_CRITICAL;
315 if (verbose)
316 printf(_("option f:%d \n"), onredirect);
317 break;
318 /* Note: H, I, and u must be malloc'd or will fail on redirects */
319 case 'H': /* Host Name (virtual host) */
320 host_name = strdup (optarg);
321 if (host_name[0] == '[') {
322 if ((p = strstr (host_name, "]:")) != NULL) /* [IPv6]:port */
323 server_port = atoi (p + 2);
324 } else if ((p = strchr (host_name, ':')) != NULL
325 && strchr (++p, ':') == NULL) /* IPv4:port or host:port */
326 server_port = atoi (p);
327 break;
328 case 'I': /* Server IP-address */
329 server_address = strdup (optarg);
330 break;
331 case 'u': /* URL path */
332 server_url = strdup (optarg);
333 server_url_length = strlen (server_url);
334 break;
335 case 'p': /* Server port */
336 if (!is_intnonneg (optarg))
337 usage2 (_("Invalid port number"), optarg);
338 else {
339 server_port = atoi (optarg);
340 specify_port = TRUE;
341 }
342 break;
343 case 'a': /* authorization info */
344 strncpy (user_auth, optarg, MAX_INPUT_BUFFER - 1);
345 user_auth[MAX_INPUT_BUFFER - 1] = 0;
346 break;
347 case 'P': /* HTTP POST data in URL encoded format */
348 if (http_method || http_post_data) break;
349 http_method = strdup("POST");
350 http_post_data = strdup (optarg);
351 break;
352 case 's': /* string or substring */
353 strncpy (string_expect, optarg, MAX_INPUT_BUFFER - 1);
354 string_expect[MAX_INPUT_BUFFER - 1] = 0;
355 break;
356 case 'e': /* string or substring */
357 strncpy (server_expect, optarg, MAX_INPUT_BUFFER - 1);
358 server_expect[MAX_INPUT_BUFFER - 1] = 0;
359 server_expect_yn = 1;
360 break;
361 case 'T': /* Content-type */
362 asprintf (&http_content_type, "%s", optarg);
363 break;
364 case 'l': /* linespan */
365 cflags &= ~REG_NEWLINE;
366 break;
367 case 'R': /* regex */
368 cflags |= REG_ICASE;
369 case 'r': /* regex */
370 strncpy (regexp, optarg, MAX_RE_SIZE - 1);
371 regexp[MAX_RE_SIZE - 1] = 0;
372 errcode = regcomp (&preg, regexp, cflags);
373 if (errcode != 0) {
374 (void) regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
375 printf (_("Could Not Compile Regular Expression: %s"), errbuf);
376 return ERROR;
377 }
378 break;
379 case INVERT_REGEX:
380 invert_regex = 1;
381 break;
382 case '4':
383 address_family = AF_INET;
384 break;
385 case '6':
386 #ifdef USE_IPV6
387 address_family = AF_INET6;
388 #else
389 usage4 (_("IPv6 support not available"));
390 #endif
391 break;
392 case 'v': /* verbose */
393 verbose = TRUE;
394 break;
395 case 'm': /* min_page_length */
396 {
397 char *tmp;
398 if (strchr(optarg, ':') != (char *)NULL) {
399 /* range, so get two values, min:max */
400 tmp = strtok(optarg, ":");
401 if (tmp == NULL) {
402 printf("Bad format: try \"-m min:max\"\n");
403 exit (STATE_WARNING);
404 } else
405 min_page_len = atoi(tmp);
407 tmp = strtok(NULL, ":");
408 if (tmp == NULL) {
409 printf("Bad format: try \"-m min:max\"\n");
410 exit (STATE_WARNING);
411 } else
412 max_page_len = atoi(tmp);
413 } else
414 min_page_len = atoi (optarg);
415 break;
416 }
417 case 'N': /* no-body */
418 no_body = TRUE;
419 break;
420 case 'M': /* max-age */
421 {
422 int L = strlen(optarg);
423 if (L && optarg[L-1] == 'm')
424 maximum_age = atoi (optarg) * 60;
425 else if (L && optarg[L-1] == 'h')
426 maximum_age = atoi (optarg) * 60 * 60;
427 else if (L && optarg[L-1] == 'd')
428 maximum_age = atoi (optarg) * 60 * 60 * 24;
429 else if (L && (optarg[L-1] == 's' ||
430 isdigit (optarg[L-1])))
431 maximum_age = atoi (optarg);
432 else {
433 fprintf (stderr, "unparsable max-age: %s\n", optarg);
434 exit (STATE_WARNING);
435 }
436 }
437 break;
438 }
439 }
441 c = optind;
443 if (server_address == NULL && c < argc)
444 server_address = strdup (argv[c++]);
446 if (host_name == NULL && c < argc)
447 host_name = strdup (argv[c++]);
449 if (server_address == NULL) {
450 if (host_name == NULL)
451 usage4 (_("You must specify a server address or host name"));
452 else
453 server_address = strdup (host_name);
454 }
456 if (check_critical_time && critical_time>(double)socket_timeout)
457 socket_timeout = (int)critical_time + 1;
459 if (http_method == NULL)
460 http_method = strdup ("GET");
462 return TRUE;
463 }
467 /* Returns 1 if we're done processing the document body; 0 to keep going */
468 static int
469 document_headers_done (char *full_page)
470 {
471 const char *body;
473 for (body = full_page; *body; body++) {
474 if (!strncmp (body, "\n\n", 2) || !strncmp (body, "\n\r\n", 3))
475 break;
476 }
478 if (!*body)
479 return 0; /* haven't read end of headers yet */
481 full_page[body - full_page] = 0;
482 return 1;
483 }
485 static time_t
486 parse_time_string (const char *string)
487 {
488 struct tm tm;
489 time_t t;
490 memset (&tm, 0, sizeof(tm));
492 /* Like this: Tue, 25 Dec 2001 02:59:03 GMT */
494 if (isupper (string[0]) && /* Tue */
495 islower (string[1]) &&
496 islower (string[2]) &&
497 ',' == string[3] &&
498 ' ' == string[4] &&
499 (isdigit(string[5]) || string[5] == ' ') && /* 25 */
500 isdigit (string[6]) &&
501 ' ' == string[7] &&
502 isupper (string[8]) && /* Dec */
503 islower (string[9]) &&
504 islower (string[10]) &&
505 ' ' == string[11] &&
506 isdigit (string[12]) && /* 2001 */
507 isdigit (string[13]) &&
508 isdigit (string[14]) &&
509 isdigit (string[15]) &&
510 ' ' == string[16] &&
511 isdigit (string[17]) && /* 02: */
512 isdigit (string[18]) &&
513 ':' == string[19] &&
514 isdigit (string[20]) && /* 59: */
515 isdigit (string[21]) &&
516 ':' == string[22] &&
517 isdigit (string[23]) && /* 03 */
518 isdigit (string[24]) &&
519 ' ' == string[25] &&
520 'G' == string[26] && /* GMT */
521 'M' == string[27] && /* GMT */
522 'T' == string[28]) {
524 tm.tm_sec = 10 * (string[23]-'0') + (string[24]-'0');
525 tm.tm_min = 10 * (string[20]-'0') + (string[21]-'0');
526 tm.tm_hour = 10 * (string[17]-'0') + (string[18]-'0');
527 tm.tm_mday = 10 * (string[5] == ' ' ? 0 : string[5]-'0') + (string[6]-'0');
528 tm.tm_mon = (!strncmp (string+8, "Jan", 3) ? 0 :
529 !strncmp (string+8, "Feb", 3) ? 1 :
530 !strncmp (string+8, "Mar", 3) ? 2 :
531 !strncmp (string+8, "Apr", 3) ? 3 :
532 !strncmp (string+8, "May", 3) ? 4 :
533 !strncmp (string+8, "Jun", 3) ? 5 :
534 !strncmp (string+8, "Jul", 3) ? 6 :
535 !strncmp (string+8, "Aug", 3) ? 7 :
536 !strncmp (string+8, "Sep", 3) ? 8 :
537 !strncmp (string+8, "Oct", 3) ? 9 :
538 !strncmp (string+8, "Nov", 3) ? 10 :
539 !strncmp (string+8, "Dec", 3) ? 11 :
540 -1);
541 tm.tm_year = ((1000 * (string[12]-'0') +
542 100 * (string[13]-'0') +
543 10 * (string[14]-'0') +
544 (string[15]-'0'))
545 - 1900);
547 tm.tm_isdst = 0; /* GMT is never in DST, right? */
549 if (tm.tm_mon < 0 || tm.tm_mday < 1 || tm.tm_mday > 31)
550 return 0;
552 /*
553 This is actually wrong: we need to subtract the local timezone
554 offset from GMT from this value. But, that's ok in this usage,
555 because we only comparing these two GMT dates against each other,
556 so it doesn't matter what time zone we parse them in.
557 */
559 t = mktime (&tm);
560 if (t == (time_t) -1) t = 0;
562 if (verbose) {
563 const char *s = string;
564 while (*s && *s != '\r' && *s != '\n')
565 fputc (*s++, stdout);
566 printf (" ==> %lu\n", (unsigned long) t);
567 }
569 return t;
571 } else {
572 return 0;
573 }
574 }
576 /* Checks if the server 'reply' is one of the expected 'statuscodes' */
577 static int
578 expected_statuscode (const char *reply, const char *statuscodes)
579 {
580 char *expected, *code;
581 int result = 0;
583 if ((expected = strdup (statuscodes)) == NULL)
584 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Memory allocation error\n"));
586 for (code = strtok (expected, ","); code != NULL; code = strtok (NULL, ","))
587 if (strstr (reply, code) != NULL) {
588 result = 1;
589 break;
590 }
592 free (expected);
593 return result;
594 }
596 static void
597 check_document_dates (const char *headers)
598 {
599 const char *s;
600 char *server_date = 0;
601 char *document_date = 0;
603 s = headers;
604 while (*s) {
605 const char *field = s;
606 const char *value = 0;
608 /* Find the end of the header field */
609 while (*s && !isspace(*s) && *s != ':')
610 s++;
612 /* Remember the header value, if any. */
613 if (*s == ':')
614 value = ++s;
616 /* Skip to the end of the header, including continuation lines. */
617 while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
618 s++;
620 /* Avoid stepping over end-of-string marker */
621 if (*s)
622 s++;
624 /* Process this header. */
625 if (value && value > field+2) {
626 char *ff = (char *) malloc (value-field);
627 char *ss = ff;
628 while (field < value-1)
629 *ss++ = tolower(*field++);
630 *ss++ = 0;
632 if (!strcmp (ff, "date") || !strcmp (ff, "last-modified")) {
633 const char *e;
634 while (*value && isspace (*value))
635 value++;
636 for (e = value; *e && *e != '\r' && *e != '\n'; e++)
637 ;
638 ss = (char *) malloc (e - value + 1);
639 strncpy (ss, value, e - value);
640 ss[e - value] = 0;
641 if (!strcmp (ff, "date")) {
642 if (server_date) free (server_date);
643 server_date = ss;
644 } else {
645 if (document_date) free (document_date);
646 document_date = ss;
647 }
648 }
649 free (ff);
650 }
651 }
653 /* Done parsing the body. Now check the dates we (hopefully) parsed. */
654 if (!server_date || !*server_date) {
655 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Server date unknown\n"));
656 } else if (!document_date || !*document_date) {
657 die (STATE_CRITICAL, _("HTTP CRITICAL - Document modification date unknown\n"));
658 } else {
659 time_t srv_data = parse_time_string (server_date);
660 time_t doc_data = parse_time_string (document_date);
662 if (srv_data <= 0) {
663 die (STATE_CRITICAL, _("HTTP CRITICAL - Server date \"%100s\" unparsable"), server_date);
664 } else if (doc_data <= 0) {
665 die (STATE_CRITICAL, _("HTTP CRITICAL - Document date \"%100s\" unparsable"), document_date);
666 } else if (doc_data > srv_data + 30) {
667 die (STATE_CRITICAL, _("HTTP CRITICAL - Document is %d seconds in the future\n"), (int)doc_data - (int)srv_data);
668 } else if (doc_data < srv_data - maximum_age) {
669 int n = (srv_data - doc_data);
670 if (n > (60 * 60 * 24 * 2))
671 die (STATE_CRITICAL,
672 _("HTTP CRITICAL - Last modified %.1f days ago\n"),
673 ((float) n) / (60 * 60 * 24));
674 else
675 die (STATE_CRITICAL,
676 _("HTTP CRITICAL - Last modified %d:%02d:%02d ago\n"),
677 n / (60 * 60), (n / 60) % 60, n % 60);
678 }
680 free (server_date);
681 free (document_date);
682 }
683 }
685 int
686 get_content_length (const char *headers)
687 {
688 const char *s;
689 int content_length = 0;
691 s = headers;
692 while (*s) {
693 const char *field = s;
694 const char *value = 0;
696 /* Find the end of the header field */
697 while (*s && !isspace(*s) && *s != ':')
698 s++;
700 /* Remember the header value, if any. */
701 if (*s == ':')
702 value = ++s;
704 /* Skip to the end of the header, including continuation lines. */
705 while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
706 s++;
707 s++;
709 /* Process this header. */
710 if (value && value > field+2) {
711 char *ff = (char *) malloc (value-field);
712 char *ss = ff;
713 while (field < value-1)
714 *ss++ = tolower(*field++);
715 *ss++ = 0;
717 if (!strcmp (ff, "content-length")) {
718 const char *e;
719 while (*value && isspace (*value))
720 value++;
721 for (e = value; *e && *e != '\r' && *e != '\n'; e++)
722 ;
723 ss = (char *) malloc (e - value + 1);
724 strncpy (ss, value, e - value);
725 ss[e - value] = 0;
726 content_length = atoi(ss);
727 free (ss);
728 }
729 free (ff);
730 }
731 }
732 return (content_length);
733 }
735 char *
736 prepend_slash (char *path)
737 {
738 char *newpath;
740 if (path[0] == '/')
741 return path;
743 if ((newpath = malloc (strlen(path) + 2)) == NULL)
744 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Memory allocation error\n"));
745 newpath[0] = '/';
746 strcpy (newpath + 1, path);
747 free (path);
748 return newpath;
749 }
751 int
752 check_http (void)
753 {
754 char *msg;
755 char *status_line;
756 char *status_code;
757 char *header;
758 char *page;
759 char *auth;
760 int http_status;
761 int i = 0;
762 size_t pagesize = 0;
763 char *full_page;
764 char *buf;
765 char *pos;
766 long microsec;
767 double elapsed_time;
768 int page_len = 0;
769 int result = STATE_UNKNOWN;
771 /* try to connect to the host at the given port number */
772 if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
773 die (STATE_CRITICAL, _("HTTP CRITICAL - Unable to open TCP socket\n"));
774 #ifdef HAVE_SSL
775 if (use_ssl == TRUE) {
776 np_net_ssl_init(sd);
777 if (check_cert == TRUE) {
778 result = np_net_ssl_check_cert(days_till_exp);
779 np_net_ssl_cleanup();
780 if (sd) close(sd);
781 return result;
782 }
783 }
784 #endif /* HAVE_SSL */
786 /* If a hostname is provided, use HTTP/1.1 and send the hostname before the
787 * Useragent. This fixes an issue with getting 301 responses from servers
788 * with virtual hosts */
789 if (host_name)
790 asprintf (&buf, "%s %s HTTP/1.1\r\nHost: %s\r\n%s\r\n", http_method, server_url, host_name, user_agent);
791 else
792 asprintf (&buf, "%s %s HTTP/1.0\r\n%s\r\n", http_method, server_url, user_agent);
794 /* tell HTTP/1.1 servers not to keep the connection alive */
795 asprintf (&buf, "%sConnection: close\r\n", buf);
797 /* optionally send any other header tag */
798 if (http_opt_headers_count) {
799 for (i = 0; i < http_opt_headers_count ; i++) {
800 for ((pos = strtok(http_opt_headers[i], INPUT_DELIMITER)); pos; (pos = strtok(NULL, INPUT_DELIMITER)))
801 asprintf (&buf, "%s%s\r\n", buf, pos);
802 }
803 free(http_opt_headers);
804 }
806 /* optionally send the authentication info */
807 if (strlen(user_auth)) {
808 base64_encode_alloc (user_auth, strlen (user_auth), &auth);
809 asprintf (&buf, "%sAuthorization: Basic %s\r\n", buf, auth);
810 }
812 /* either send http POST data */
813 if (http_post_data) {
814 if (http_content_type) {
815 asprintf (&buf, "%sContent-Type: %s\r\n", buf, http_content_type);
816 } else {
817 asprintf (&buf, "%sContent-Type: application/x-www-form-urlencoded\r\n", buf);
818 }
820 asprintf (&buf, "%sContent-Length: %i\r\n\r\n", buf, (int)strlen (http_post_data));
821 asprintf (&buf, "%s%s%s", buf, http_post_data, CRLF);
822 }
823 else {
824 /* or just a newline so the server knows we're done with the request */
825 asprintf (&buf, "%s%s", buf, CRLF);
826 }
828 if (verbose) printf ("%s\n", buf);
829 my_send (buf, strlen (buf));
831 /* fetch the page */
832 full_page = strdup("");
833 while ((i = my_recv (buffer, MAX_INPUT_BUFFER-1)) > 0) {
834 buffer[i] = '\0';
835 asprintf (&full_page, "%s%s", full_page, buffer);
836 pagesize += i;
838 if (no_body && document_headers_done (full_page)) {
839 i = 0;
840 break;
841 }
842 }
844 if (i < 0 && errno != ECONNRESET) {
845 #ifdef HAVE_SSL
846 /*
847 if (use_ssl) {
848 sslerr=SSL_get_error(ssl, i);
849 if ( sslerr == SSL_ERROR_SSL ) {
850 die (STATE_WARNING, _("HTTP WARNING - Client Certificate Required\n"));
851 } else {
852 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
853 }
854 }
855 else {
856 */
857 #endif
858 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
859 #ifdef HAVE_SSL
860 /* XXX
861 }
862 */
863 #endif
864 }
866 /* return a CRITICAL status if we couldn't read any data */
867 if (pagesize == (size_t) 0)
868 die (STATE_CRITICAL, _("HTTP CRITICAL - No data received from host\n"));
870 /* close the connection */
871 #ifdef HAVE_SSL
872 np_net_ssl_cleanup();
873 #endif
874 if (sd) close(sd);
876 /* reset the alarm */
877 alarm (0);
879 /* leave full_page untouched so we can free it later */
880 page = full_page;
882 if (verbose)
883 printf ("%s://%s:%d%s is %d characters\n",
884 use_ssl ? "https" : "http", server_address,
885 server_port, server_url, (int)pagesize);
887 /* find status line and null-terminate it */
888 status_line = page;
889 page += (size_t) strcspn (page, "\r\n");
890 pos = page;
891 page += (size_t) strspn (page, "\r\n");
892 status_line[strcspn(status_line, "\r\n")] = 0;
893 strip (status_line);
894 if (verbose)
895 printf ("STATUS: %s\n", status_line);
897 /* find header info and null-terminate it */
898 header = page;
899 while (strcspn (page, "\r\n") > 0) {
900 page += (size_t) strcspn (page, "\r\n");
901 pos = page;
902 if ((strspn (page, "\r") == 1 && strspn (page, "\r\n") >= 2) ||
903 (strspn (page, "\n") == 1 && strspn (page, "\r\n") >= 2))
904 page += (size_t) 2;
905 else
906 page += (size_t) 1;
907 }
908 page += (size_t) strspn (page, "\r\n");
909 header[pos - header] = 0;
910 if (verbose)
911 printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header,
912 (no_body ? " [[ skipped ]]" : page));
914 /* make sure the status line matches the response we are looking for */
915 if (!expected_statuscode (status_line, server_expect)) {
916 if (server_port == HTTP_PORT)
917 asprintf (&msg,
918 _("Invalid HTTP response received from host: %s\n"),
919 status_line);
920 else
921 asprintf (&msg,
922 _("Invalid HTTP response received from host on port %d: %s\n"),
923 server_port, status_line);
924 die (STATE_CRITICAL, "HTTP CRITICAL - %s", msg);
925 }
927 /* Exit here if server_expect was set by user and not default */
928 if ( server_expect_yn ) {
929 asprintf (&msg,
930 _("HTTP OK: Status line output matched \"%s\"\n"),
931 server_expect);
932 if (verbose)
933 printf ("%s\n",msg);
934 }
935 else {
936 /* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
937 /* HTTP-Version = "HTTP" "/" 1*DIGIT "." 1*DIGIT */
938 /* Status-Code = 3 DIGITS */
940 status_code = strchr (status_line, ' ') + sizeof (char);
941 if (strspn (status_code, "1234567890") != 3)
942 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status Line (%s)\n"), status_line);
944 http_status = atoi (status_code);
946 /* check the return code */
948 if (http_status >= 600 || http_status < 100)
949 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%s)\n"), status_line);
951 /* server errors result in a critical state */
952 else if (http_status >= 500)
953 die (STATE_CRITICAL, _("HTTP CRITICAL: %s\n"), status_line);
955 /* client errors result in a warning state */
956 else if (http_status >= 400)
957 die (STATE_WARNING, _("HTTP WARNING: %s\n"), status_line);
959 /* check redirected page if specified */
960 else if (http_status >= 300) {
962 if (onredirect == STATE_DEPENDENT)
963 redir (header, status_line);
964 else if (onredirect == STATE_UNKNOWN)
965 printf (_("HTTP UNKNOWN"));
966 else if (onredirect == STATE_OK)
967 printf (_("HTTP OK"));
968 else if (onredirect == STATE_WARNING)
969 printf (_("HTTP WARNING"));
970 else if (onredirect == STATE_CRITICAL)
971 printf (_("HTTP CRITICAL"));
972 microsec = deltime (tv);
973 elapsed_time = (double)microsec / 1.0e6;
974 die (onredirect,
975 _(" - %s - %.3f second response time %s|%s %s\n"),
976 status_line, elapsed_time,
977 (display_html ? "</A>" : ""),
978 perfd_time (elapsed_time), perfd_size (pagesize));
979 } /* end if (http_status >= 300) */
981 } /* end else (server_expect_yn) */
983 if (maximum_age >= 0) {
984 check_document_dates (header);
985 }
987 /* check elapsed time */
988 microsec = deltime (tv);
989 elapsed_time = (double)microsec / 1.0e6;
990 asprintf (&msg,
991 _(" - %s - %.3f second response time %s|%s %s\n"),
992 status_line, elapsed_time,
993 (display_html ? "</A>" : ""),
994 perfd_time (elapsed_time), perfd_size (pagesize));
995 if (check_critical_time == TRUE && elapsed_time > critical_time)
996 die (STATE_CRITICAL, "HTTP %s: %s", _("CRITICAL"), msg);
997 if (check_warning_time == TRUE && elapsed_time > warning_time)
998 die (STATE_WARNING, "HTTP %s: %s", _("WARNING"), msg);
1000 /* Page and Header content checks go here */
1001 /* these checks should be last */
1003 if (strlen (string_expect)) {
1004 if (strstr (page, string_expect)) {
1005 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
1006 status_line, elapsed_time,
1007 (display_html ? "</A>" : ""),
1008 perfd_time (elapsed_time), perfd_size (pagesize));
1009 exit (STATE_OK);
1010 }
1011 else {
1012 printf (_("HTTP CRITICAL - string not found%s|%s %s\n"),
1013 (display_html ? "</A>" : ""),
1014 perfd_time (elapsed_time), perfd_size (pagesize));
1015 exit (STATE_CRITICAL);
1016 }
1017 }
1019 if (strlen (regexp)) {
1020 errcode = regexec (&preg, page, REGS, pmatch, 0);
1021 if ((errcode == 0 && invert_regex == 0) || (errcode == REG_NOMATCH && invert_regex == 1)) {
1022 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
1023 status_line, elapsed_time,
1024 (display_html ? "</A>" : ""),
1025 perfd_time (elapsed_time), perfd_size (pagesize));
1026 exit (STATE_OK);
1027 }
1028 else if ((errcode == REG_NOMATCH && invert_regex == 0) || (errcode == 0 && invert_regex == 1)) {
1029 if (invert_regex == 0)
1030 msg = strdup(_("pattern not found"));
1031 else
1032 msg = strdup(_("pattern found"));
1033 printf (("%s - %s%s|%s %s\n"),
1034 _("HTTP CRITICAL"),
1035 msg,
1036 (display_html ? "</A>" : ""),
1037 perfd_time (elapsed_time), perfd_size (pagesize));
1038 exit (STATE_CRITICAL);
1039 }
1040 else {
1041 regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
1042 printf (_("HTTP CRITICAL - Execute Error: %s\n"), errbuf);
1043 exit (STATE_CRITICAL);
1044 }
1045 }
1047 /* make sure the page is of an appropriate size */
1048 /* page_len = get_content_length(header); */
1049 page_len = pagesize;
1050 if ((max_page_len > 0) && (page_len > max_page_len)) {
1051 printf (_("HTTP WARNING: page size %d too large%s|%s\n"),
1052 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1053 exit (STATE_WARNING);
1054 } else if ((min_page_len > 0) && (page_len < min_page_len)) {
1055 printf (_("HTTP WARNING: page size %d too small%s|%s\n"),
1056 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1057 exit (STATE_WARNING);
1058 }
1059 /* We only get here if all tests have been passed */
1060 asprintf (&msg, _("HTTP OK %s - %d bytes in %.3f seconds %s|%s %s\n"),
1061 status_line, page_len, elapsed_time,
1062 (display_html ? "</A>" : ""),
1063 perfd_time (elapsed_time), perfd_size (page_len));
1064 die (STATE_OK, "%s", msg);
1065 return STATE_UNKNOWN;
1066 }
1070 /* per RFC 2396 */
1071 #define URI_HTTP "%5[HTPShtps]"
1072 #define URI_HOST "%255[-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1073 #define URI_PORT "%6d" /* MAX_PORT's width is 5 chars, 6 to detect overflow */
1074 #define URI_PATH "%[-_.!~*'();/?:@&=+$,%#abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1075 #define HD1 URI_HTTP "://" URI_HOST ":" URI_PORT "/" URI_PATH
1076 #define HD2 URI_HTTP "://" URI_HOST "/" URI_PATH
1077 #define HD3 URI_HTTP "://" URI_HOST ":" URI_PORT
1078 #define HD4 URI_HTTP "://" URI_HOST
1079 #define HD5 URI_PATH
1081 void
1082 redir (char *pos, char *status_line)
1083 {
1084 int i = 0;
1085 char *x;
1086 char xx[2];
1087 char type[6];
1088 char *addr;
1089 char *url;
1091 addr = malloc (MAX_IPV4_HOSTLENGTH + 1);
1092 if (addr == NULL)
1093 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate addr\n"));
1095 url = malloc (strcspn (pos, "\r\n"));
1096 if (url == NULL)
1097 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate url\n"));
1099 while (pos) {
1100 sscanf (pos, "%1[Ll]%*1[Oo]%*1[Cc]%*1[Aa]%*1[Tt]%*1[Ii]%*1[Oo]%*1[Nn]:%n", xx, &i);
1101 if (i == 0) {
1102 pos += (size_t) strcspn (pos, "\r\n");
1103 pos += (size_t) strspn (pos, "\r\n");
1104 if (strlen(pos) == 0)
1105 die (STATE_UNKNOWN,
1106 _("HTTP UNKNOWN - Could not find redirect location - %s%s\n"),
1107 status_line, (display_html ? "</A>" : ""));
1108 continue;
1109 }
1111 pos += i;
1112 pos += strspn (pos, " \t");
1114 /*
1115 * RFC 2616 (4.2): ``Header fields can be extended over multiple lines by
1116 * preceding each extra line with at least one SP or HT.''
1117 */
1118 for (; (i = strspn (pos, "\r\n")); pos += i) {
1119 pos += i;
1120 if (!(i = strspn (pos, " \t"))) {
1121 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Empty redirect location%s\n"),
1122 display_html ? "</A>" : "");
1123 }
1124 }
1126 url = realloc (url, strcspn (pos, "\r\n") + 1);
1127 if (url == NULL)
1128 die (STATE_UNKNOWN, _("HTTP UNKNOWN - could not allocate url\n"));
1130 /* URI_HTTP, URI_HOST, URI_PORT, URI_PATH */
1131 if (sscanf (pos, HD1, type, addr, &i, url) == 4) {
1132 url = prepend_slash (url);
1133 use_ssl = server_type_check (type);
1134 }
1136 /* URI_HTTP URI_HOST URI_PATH */
1137 else if (sscanf (pos, HD2, type, addr, url) == 3 ) {
1138 url = prepend_slash (url);
1139 use_ssl = server_type_check (type);
1140 i = server_port_check (use_ssl);
1141 }
1143 /* URI_HTTP URI_HOST URI_PORT */
1144 else if (sscanf (pos, HD3, type, addr, &i) == 3) {
1145 strcpy (url, HTTP_URL);
1146 use_ssl = server_type_check (type);
1147 }
1149 /* URI_HTTP URI_HOST */
1150 else if (sscanf (pos, HD4, type, addr) == 2) {
1151 strcpy (url, HTTP_URL);
1152 use_ssl = server_type_check (type);
1153 i = server_port_check (use_ssl);
1154 }
1156 /* URI_PATH */
1157 else if (sscanf (pos, HD5, url) == 1) {
1158 /* relative url */
1159 if ((url[0] != '/')) {
1160 if ((x = strrchr(server_url, '/')))
1161 *x = '\0';
1162 asprintf (&url, "%s/%s", server_url, url);
1163 }
1164 i = server_port;
1165 strcpy (type, server_type);
1166 strcpy (addr, host_name ? host_name : server_address);
1167 }
1169 else {
1170 die (STATE_UNKNOWN,
1171 _("HTTP UNKNOWN - Could not parse redirect location - %s%s\n"),
1172 pos, (display_html ? "</A>" : ""));
1173 }
1175 break;
1177 } /* end while (pos) */
1179 if (++redir_depth > max_depth)
1180 die (STATE_WARNING,
1181 _("HTTP WARNING - maximum redirection depth %d exceeded - %s://%s:%d%s%s\n"),
1182 max_depth, type, addr, i, url, (display_html ? "</A>" : ""));
1184 if (server_port==i &&
1185 !strcmp(server_address, addr) &&
1186 (host_name && !strcmp(host_name, addr)) &&
1187 !strcmp(server_url, url))
1188 die (STATE_WARNING,
1189 _("HTTP WARNING - redirection creates an infinite loop - %s://%s:%d%s%s\n"),
1190 type, addr, i, url, (display_html ? "</A>" : ""));
1192 strcpy (server_type, type);
1194 free (host_name);
1195 host_name = strdup (addr);
1197 free (server_address);
1198 server_address = strdup (addr);
1200 free (server_url);
1201 server_url = url;
1203 if ((server_port = i) > MAX_PORT)
1204 die (STATE_UNKNOWN,
1205 _("HTTP UNKNOWN - Redirection to port above %d - %s://%s:%d%s%s\n"),
1206 MAX_PORT, server_type, server_address, server_port, server_url,
1207 display_html ? "</A>" : "");
1209 if (verbose)
1210 printf (_("Redirection to %s://%s:%d%s\n"), server_type,
1211 host_name ? host_name : server_address, server_port, server_url);
1213 check_http ();
1214 }
1218 int
1219 server_type_check (const char *type)
1220 {
1221 if (strcmp (type, "https"))
1222 return FALSE;
1223 else
1224 return TRUE;
1225 }
1227 int
1228 server_port_check (int ssl_flag)
1229 {
1230 if (ssl_flag)
1231 return HTTPS_PORT;
1232 else
1233 return HTTP_PORT;
1234 }
1236 char *perfd_time (double elapsed_time)
1237 {
1238 return fperfdata ("time", elapsed_time, "s",
1239 check_warning_time, warning_time,
1240 check_critical_time, critical_time,
1241 TRUE, 0, FALSE, 0);
1242 }
1246 char *perfd_size (int page_len)
1247 {
1248 return perfdata ("size", page_len, "B",
1249 (min_page_len>0?TRUE:FALSE), min_page_len,
1250 (min_page_len>0?TRUE:FALSE), 0,
1251 TRUE, 0, FALSE, 0);
1252 }
1254 void
1255 print_help (void)
1256 {
1257 print_revision (progname, revision);
1259 printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
1260 printf (COPYRIGHT, copyright, email);
1262 printf ("%s\n", _("This plugin tests the HTTP service on the specified host. It can test"));
1263 printf ("%s\n", _("normal (http) and secure (https) servers, follow redirects, search for"));
1264 printf ("%s\n", _("strings and regular expressions, check connection times, and report on"));
1265 printf ("%s\n", _("certificate expiration times."));
1267 printf ("\n\n");
1269 print_usage ();
1271 printf (_("NOTE: One or both of -H and -I must be specified"));
1273 printf ("\n");
1275 printf (_(UT_HELP_VRSN));
1276 printf (_(UT_EXTRA_OPTS));
1278 printf (" %s\n", "-H, --hostname=ADDRESS");
1279 printf (" %s\n", _("Host name argument for servers using host headers (virtual host)"));
1280 printf (" %s\n", _("Append a port to include it in the header (eg: example.com:5000)"));
1281 printf (" %s\n", "-I, --IP-address=ADDRESS");
1282 printf (" %s\n", _("IP address or name (use numeric address if possible to bypass DNS lookup)."));
1283 printf (" %s\n", "-p, --port=INTEGER");
1284 printf (" %s", _("Port number (default: "));
1285 printf ("%d)\n", HTTP_PORT);
1287 printf (_(UT_IPv46));
1289 #ifdef HAVE_SSL
1290 printf (" %s\n", "-S, --ssl");
1291 printf (" %s\n", _("Connect via SSL. Port defaults to 443"));
1292 printf (" %s\n", "-C, --certificate=INTEGER");
1293 printf (" %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443"));
1294 printf (" %s\n", _("(when this option is used the url is not checked.)\n"));
1295 #endif
1297 printf (" %s\n", "-e, --expect=STRING");
1298 printf (" %s\n", _("Comma-delimited list of strings, at least one of them is expected in"));
1299 printf (" %s", _("the first (status) line of the server response (default: "));
1300 printf ("%s)\n", HTTP_EXPECT);
1301 printf (" %s\n", _("If specified skips all other status line logic (ex: 3xx, 4xx, 5xx processing)"));
1302 printf (" %s\n", "-s, --string=STRING");
1303 printf (" %s\n", _("String to expect in the content"));
1304 printf (" %s\n", "-u, --url=PATH");
1305 printf (" %s\n", _("URL to GET or POST (default: /)"));
1306 printf (" %s\n", "-P, --post=STRING");
1307 printf (" %s\n", _("URL encoded http POST data"));
1308 printf (" %s\n", "-N, --no-body");
1309 printf (" %s\n", _("Don't wait for document body: stop reading after headers."));
1310 printf (" %s\n", _("(Note that this still does an HTTP GET or POST, not a HEAD.)"));
1311 printf (" %s\n", "-M, --max-age=SECONDS");
1312 printf (" %s\n", _("Warn if document is more than SECONDS old. the number can also be of"));
1313 printf (" %s\n", _("the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days."));
1314 printf (" %s\n", "-T, --content-type=STRING");
1315 printf (" %s\n", _("specify Content-Type header media type when POSTing\n"));
1317 printf (" %s\n", "-l, --linespan");
1318 printf (" %s\n", _("Allow regex to span newlines (must precede -r or -R)"));
1319 printf (" %s\n", "-r, --regex, --ereg=STRING");
1320 printf (" %s\n", _("Search page for regex STRING"));
1321 printf (" %s\n", "-R, --eregi=STRING");
1322 printf (" %s\n", _("Search page for case-insensitive regex STRING"));
1323 printf (" %s\n", "--invert-regex");
1324 printf (" %s\n", _("Return CRITICAL if found, OK if not\n"));
1326 printf (" %s\n", "-a, --authorization=AUTH_PAIR");
1327 printf (" %s\n", _("Username:password on sites with basic authentication"));
1328 printf (" %s\n", "-A, --useragent=STRING");
1329 printf (" %s\n", _("String to be sent in http header as \"User Agent\""));
1330 printf (" %s\n", "-k, --header=STRING");
1331 printf (" %s\n", _(" Any other tags to be sent in http header. Use multiple times for additional headers"));
1332 printf (" %s\n", "-L, --link");
1333 printf (" %s\n", _("Wrap output in HTML link (obsoleted by urlize)"));
1334 printf (" %s\n", "-f, --onredirect=<ok|warning|critical|follow>");
1335 printf (" %s\n", _("How to handle redirected pages"));
1336 printf (" %s\n", "-m, --pagesize=INTEGER<:INTEGER>");
1337 printf (" %s\n", _("Minimum page size required (bytes) : Maximum page size required (bytes)"));
1339 printf (_(UT_WARN_CRIT));
1341 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
1343 printf (_(UT_VERBOSE));
1345 printf ("\n");
1346 printf ("%s\n", _("Notes:"));
1347 printf (" %s\n", _("This plugin will attempt to open an HTTP connection with the host."));
1348 printf (" %s\n", _("Successful connects return STATE_OK, refusals and timeouts return STATE_CRITICAL"));
1349 printf (" %s\n", _("other errors return STATE_UNKNOWN. Successful connects, but incorrect reponse"));
1350 printf (" %s\n", _("messages from the host result in STATE_WARNING return values. If you are"));
1351 printf (" %s\n", _("checking a virtual server that uses 'host headers' you must supply the FQDN"));
1352 printf (" %s\n", _("(fully qualified domain name) as the [host_name] argument."));
1353 printf ("\n");
1354 printf (_(UT_EXTRA_OPTS_NOTES));
1356 #ifdef HAVE_SSL
1357 printf ("\n");
1358 printf (" %s\n", _("This plugin can also check whether an SSL enabled web server is able to"));
1359 printf (" %s\n", _("serve content (optionally within a specified time) or whether the X509 "));
1360 printf (" %s\n", _("certificate is still valid for the specified number of days."));
1361 printf ("\n");
1362 printf ("%s\n", _("Examples:"));
1363 printf (" %s\n\n", "CHECK CONTENT: check_http -w 5 -c 10 --ssl -H www.verisign.com");
1364 printf (" %s\n", _("When the 'www.verisign.com' server returns its content within 5 seconds,"));
1365 printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
1366 printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
1367 printf (" %s\n\n", _("a STATE_CRITICAL will be returned."));
1369 printf (" %s\n\n", "CHECK CERTIFICATE: check_http -H www.verisign.com -C 14");
1370 printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 14 days,"));
1371 printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
1372 printf (" %s\n", _("14 days, a STATE_WARNING is returned. A STATE_CRITICAL will be returned when"));
1373 printf (" %s\n", _("the certificate is expired."));
1374 #endif
1376 printf (_(UT_SUPPORT));
1378 }
1382 void
1383 print_usage (void)
1384 {
1385 printf (_("Usage:"));
1386 printf (" %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname);
1387 printf (" [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L]\n");
1388 printf (" [-a auth] [-f <ok | warn | critcal | follow>] [-e <expect>]\n");
1389 printf (" [-s string] [-l] [-r <regex> | -R <case-insensitive regex>] [-P string]\n");
1390 printf (" [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>] [-A string]\n");
1391 printf (" [-k string] [-S] [-C <age>] [-T <content-type>]\n");
1392 }