1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
|
--- /tmp/check_http.c 2004-04-13 20:09:38.000000000 -0700
+++ check_http.c 2004-04-13 20:25:40.000000000 -0700
@@ -21,6 +21,8 @@
*
* $Id: check_http.c,v 1.24.2.4 2003/06/21 05:31:23 kdebisschop Exp $
*
+ * 13-Apr-2004 -- jwz -- added "--no-body" and "--max-age" options
+ *
*****************************************************************************/
const char *progname = "check_http";
@@ -45,7 +47,7 @@
[-w <warn time>] [-c <critical time>] [-t <timeout>] [-L]\n\
[-a auth] [-f <ok | warn | critcal | follow>] [-e <expect>]\n\
[-s string] [-l] [-r <regex> | -R <case-insensitive regex>]\n\
- [-P string]"
+ [-P string] [-N] [-M <age>]"
#define LONGOPTIONS "\
-H, --hostname=ADDRESS\n\
@@ -63,6 +65,13 @@
Port number (default: %d)\n\
-P, --post=STRING\n\
URL encoded http POST data\n\
+ -N, --no-body\n\
+ Don't wait for document body: stop reading after headers.\n\
+ (Note that this still does an HTTP GET or POST, not a HEAD.)\n\
+ -M, --max-age=SECONDS\n\
+ Warn if the document is more than SECONDS old. The number can\n\
+ also be of the form \"10m\" for minutes, \"10h\" for hours, or\n\
+ \"10d\" for days.\n\
-w, --warning=INTEGER\n\
Response time to result in warning status (seconds)\n\
-c, --critical=INTEGER\n\
@@ -159,6 +168,10 @@
int check_certificate (X509 **);
#endif
+/* jwz */
+int no_body = FALSE;
+int maximum_age = -1;
+
#ifdef HAVE_REGEX_H
enum {
REGS = 2,
@@ -311,6 +324,10 @@
{"linespan", no_argument, 0, 'l'},
{"onredirect", required_argument, 0, 'f'},
{"certificate", required_argument, 0, 'C'},
+
+ /* jwz */
+ {"no-body", no_argument, 0, 'N'},
+ {"max-age", required_argument, 0, 'M'},
{0, 0, 0, 0}
};
#endif
@@ -331,7 +348,8 @@
strcpy (argv[c], "-n");
}
-#define OPTCHARS "Vvht:c:w:H:P:I:a:e:p:s:R:r:u:f:C:nlLS"
+/*#define OPTCHARS "Vvht:c:w:H:P:I:a:e:p:s:R:r:u:f:C:nlLS"*/
+#define OPTCHARS "Vvht:c:w:H:P:I:a:e:p:s:R:r:u:f:C:M:nlLSN" /* jwz */
while (1) {
#ifdef HAVE_GETOPT_H
@@ -469,6 +487,27 @@
case 'v': /* verbose */
verbose = TRUE;
break;
+ case 'N': /* no-body (jwz) */
+ no_body = TRUE;
+ break;
+ case 'M': /* max-age (jwz) */
+ {
+ int L = strlen(optarg);
+ if (L && optarg[L-1] == 'm')
+ maximum_age = atoi (optarg) * 60;
+ else if (L && optarg[L-1] == 'h')
+ maximum_age = atoi (optarg) * 60 * 60;
+ else if (L && optarg[L-1] == 'd')
+ maximum_age = atoi (optarg) * 60 * 60 * 24;
+ else if (L && (optarg[L-1] == 's' ||
+ isdigit (optarg[L-1])))
+ maximum_age = atoi (optarg);
+ else {
+ fprintf (stderr, "unparsable max-age: %s\n", optarg);
+ exit (1);
+ }
+ }
+ break;
}
}
@@ -534,6 +573,223 @@
+/* Returns 1 if we're done processing the document body; 0 to keep going.
+ (jwz)
+ */
+static int
+document_headers_done (char *full_page)
+{
+ const char *body, *s;
+ const char *end;
+
+ for (body = full_page; *body; body++) {
+ if (!strncmp (body, "\n\n", 2) ||
+ !strncmp (body, "\n\r\n", 3))
+ break;
+ }
+
+ if (!*body)
+ return 0; /* haven't read end of headers yet */
+
+ full_page[body - full_page] = 0;
+ return 1;
+}
+
+
+/* jwz */
+static time_t
+parse_time_string (const char *string)
+{
+ struct tm tm;
+ time_t t;
+ memset (&tm, 0, sizeof(tm));
+
+ /* Like this: Tue, 25 Dec 2001 02:59:03 GMT */
+
+ if (isupper (string[0]) && /* Tue */
+ islower (string[1]) &&
+ islower (string[2]) &&
+ ',' == string[3] &&
+ ' ' == string[4] &&
+ (isdigit(string[5]) || string[5] == ' ') && /* 25 */
+ isdigit (string[6]) &&
+ ' ' == string[7] &&
+ isupper (string[8]) && /* Dec */
+ islower (string[9]) &&
+ islower (string[10]) &&
+ ' ' == string[11] &&
+ isdigit (string[12]) && /* 2001 */
+ isdigit (string[13]) &&
+ isdigit (string[14]) &&
+ isdigit (string[15]) &&
+ ' ' == string[16] &&
+ isdigit (string[17]) && /* 02: */
+ isdigit (string[18]) &&
+ ':' == string[19] &&
+ isdigit (string[20]) && /* 59: */
+ isdigit (string[21]) &&
+ ':' == string[22] &&
+ isdigit (string[23]) && /* 03 */
+ isdigit (string[24]) &&
+ ' ' == string[25] &&
+ 'G' == string[26] && /* GMT */
+ 'M' == string[27] && /* GMT */
+ 'T' == string[28]) {
+
+ tm.tm_sec = 10 * (string[23]-'0') + (string[24]-'0');
+ tm.tm_min = 10 * (string[20]-'0') + (string[21]-'0');
+ tm.tm_hour = 10 * (string[17]-'0') + (string[18]-'0');
+ tm.tm_mday = 10 * (string[5] == ' ' ? 0 : string[5]-'0') + (string[6]-'0');
+ tm.tm_mon = (!strncmp (string+8, "Jan", 3) ? 0 :
+ !strncmp (string+8, "Feb", 3) ? 1 :
+ !strncmp (string+8, "Mar", 3) ? 2 :
+ !strncmp (string+8, "Apr", 3) ? 3 :
+ !strncmp (string+8, "May", 3) ? 4 :
+ !strncmp (string+8, "Jun", 3) ? 5 :
+ !strncmp (string+8, "Jul", 3) ? 6 :
+ !strncmp (string+8, "Aug", 3) ? 7 :
+ !strncmp (string+8, "Sep", 3) ? 8 :
+ !strncmp (string+8, "Oct", 3) ? 9 :
+ !strncmp (string+8, "Nov", 3) ? 10 :
+ !strncmp (string+8, "Dec", 3) ? 11 :
+ -1);
+ tm.tm_year = ((1000 * (string[12]-'0') +
+ 100 * (string[13]-'0') +
+ 10 * (string[14]-'0') +
+ (string[15]-'0'))
+ - 1900);
+
+ tm.tm_isdst = 0; /* GMT is never in DST, right? */
+
+ if (tm.tm_mon < 0 ||
+ tm.tm_mday < 1 ||
+ tm.tm_mday > 31)
+ return 0;
+
+ /* #### This is actually wrong: we need to subtract the local timezone
+ offset from GMT from this value. But, that's ok in this usage,
+ because we only comparing these two GMT dates against each other,
+ so it doesn't matter what time zone we parse them in.
+ */
+
+ t = mktime (&tm);
+ if (t == (time_t) -1) t = 0;
+
+ if (verbose) {
+ const char *s = string;
+ while (*s && *s != '\r' && *s != '\n')
+ fputc (*s++, stdout);
+ printf (" ==> %lu\n", (unsigned long) t);
+ }
+
+ return t;
+
+ } else {
+ return 0;
+ }
+}
+
+
+/* jwz */
+static void
+check_document_dates (const char *headers)
+{
+ const char *s;
+ char *server_date = 0;
+ char *document_date = 0;
+
+ s = headers;
+ while (*s) {
+ const char *field = s;
+ const char *value = 0;
+
+ /* Find the end of the header field */
+ while (*s && !isspace(*s) && *s != ':')
+ s++;
+
+ /* Remember the header value, if any. */
+ if (*s == ':')
+ value = ++s;
+
+ /* Skip to the end of the header, including continuation lines. */
+ while (*s &&
+ !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
+ s++;
+ s++;
+
+ /* Process this header. */
+ if (value && value > field+2) {
+ char *ff = (char *) malloc (value-field);
+ char *ss = ff;
+ while (field < value-1)
+ *ss++ = tolower(*field++);
+ *ss++ = 0;
+
+ if (!strcmp (ff, "date") ||
+ !strcmp (ff, "last-modified")) {
+ const char *e;
+ while (*value && isspace (*value))
+ value++;
+ for (e = value; *e && *e != '\r' && *e != '\n'; e++)
+ ;
+ ss = (char *) malloc (e - value + 1);
+ strncpy (ss, value, e - value);
+ ss[e - value] = 0;
+ if (!strcmp (ff, "date")) {
+ if (server_date) free (server_date);
+ server_date = ss;
+ } else {
+ if (document_date) free (document_date);
+ document_date = ss;
+ }
+ }
+ free (ff);
+ }
+ }
+
+ /* Done parsing the body. Now check the dates we (hopefully) parsed.
+ */
+ if (!server_date || !*server_date) {
+ terminate (STATE_UNKNOWN, "server date unknown\n");
+ } else if (!document_date || !*document_date) {
+ terminate (STATE_CRITICAL, "document modification date unknown\n");
+ } else {
+ time_t sd = parse_time_string (server_date);
+ time_t dd = parse_time_string (document_date);
+ char buf [255];
+
+ if (sd <= 0) {
+ sprintf (buf, "server date \"%100s\" unparsable", server_date);
+ terminate (STATE_CRITICAL, buf);
+
+ } else if (dd <= 0) {
+ sprintf (buf, "document date \"%100s\" unparsable", document_date);
+ terminate (STATE_CRITICAL, buf);
+
+ } else if (dd > sd + 30) {
+ char buf[200];
+ sprintf (buf, "document is %d seconds in the future\n", dd - sd);
+ terminate (STATE_CRITICAL, buf);
+
+ } else if (dd < sd - maximum_age) {
+ char buf[200];
+ int n = (sd - dd);
+ if (n > (60 * 60 * 24 * 2))
+ sprintf (buf, "last modified %.1f days ago\n",
+ ((float) n) / (60 * 60 * 24));
+ else
+ sprintf (buf, "last modified %d:%02d:%02d ago\n",
+ n / (60 * 60), (n / 60) % 60, n % 60);
+ terminate (STATE_CRITICAL, buf);
+ }
+
+ free (server_date);
+ free (document_date);
+ }
+}
+
+
+
int
check_http (void)
{
@@ -625,6 +881,12 @@
buffer[i] = '\0';
asprintf (&full_page, "%s%s", full_page, buffer);
pagesize += i;
+
+ /* jwz */
+ if (no_body && document_headers_done (full_page)) {
+ i = 0;
+ break;
+ }
}
if (i < 0 && errno != ECONNRESET) {
@@ -685,7 +947,8 @@
page += (size_t) strspn (page, "\r\n");
header[pos - header] = 0;
if (verbose)
- printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header, page);
+ printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header,
+ (no_body ? " [[ skipped ]]" : page)); /* jwz */
/* make sure the status line matches the response we are looking for */
if (!strstr (status_line, server_expect)) {
@@ -810,6 +1073,11 @@
} /* end else (server_expect_yn) */
+ /* jwz */
+ if (maximum_age >= 0) {
+ check_document_dates (header);
+ }
+
/* check elapsed time */
elapsed_time = delta_time (tv);
asprintf (&msg, "HTTP problem: %s - %7.3f second response time %s%s|time=%7.3f\n",
|
