1 files changed, 243 insertions, 3 deletions

diff --git a/plugins/check_http.c b/plugins/check_http.c
index 840ba87..2281786 100644
--- a/plugins/check_http.c
+++ b/plugins/check_http.c
@@ -63,6 +63,8 @@ X509 *server_cert;
 int connect_SSL (void);
 int check_certificate (X509 **);
 #endif
+int no_body = FALSE;
+int maximum_age = -1;
 
 #ifdef HAVE_REGEX_H
 enum {
@@ -209,6 +211,8 @@ process_arguments (int argc, char **argv)
                 {"linespan", no_argument, 0, 'l'},
                 {"onredirect", required_argument, 0, 'f'},
                 {"certificate", required_argument, 0, 'C'},
+                {"no-body", no_argument, 0, 'N'},
+                {"max-age", required_argument, 0, 'M'},
                 {"content-type", required_argument, 0, 'T'},
                 {"min", required_argument, 0, 'm'},
                 {"use-ipv4", no_argument, 0, '4'},
@@ -233,7 +237,7 @@ process_arguments (int argc, char **argv)
         }
 
         while (1) {
-                c = getopt_long (argc, argv, "Vvh46t:c:w:H:P:T:I:a:e:p:s:R:r:u:f:C:nlLSm:", longopts, &option);
+                c = getopt_long (argc, argv, "Vvh46t:c:w:H:P:T:I:a:e:p:s:R:r:u:f:C:nlLSm:M:N", longopts, &option);
                 if (c == -1 || c == EOF)
                         break;
 
@@ -390,6 +394,27 @@ process_arguments (int argc, char **argv)
                 case 'm': /* min_page_length */
                         min_page_len = atoi (optarg);
                         break;
+                case 'N': /* no-body */
+                        no_body = TRUE;
+                        break;
+                case 'M': /* max-age */
+                  {
+                    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;
                 }
         }
 
@@ -464,6 +489,205 @@ base64 (const char *bin, size_t len)
 
 
 
+/* Returns 1 if we're done processing the document body; 0 to keep going */
+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;
+}
+
+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;
+        }
+}
+
+
+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) {
+                die (STATE_UNKNOWN, _("Server date unknown\n"));
+        } else if (!document_date || !*document_date) {
+                die (STATE_CRITICAL, _("Document modification date unknown\n"));
+        } else {
+                time_t sd = parse_time_string (server_date);
+                time_t dd = parse_time_string (document_date);
+
+                if (sd <= 0) {
+                        die (STATE_CRITICAL, _("CRITICAL - Server date \"%100s\" unparsable"), server_date);
+                } else if (dd <= 0) {
+                        die (STATE_CRITICAL, _("CRITICAL - Document date \"%100s\" unparsable"), document_date);
+                } else if (dd > sd + 30) {
+                        die (STATE_CRITICAL, _("CRITICAL - Document is %d seconds in the future\n"), dd - sd);
+                } else if (dd < sd - maximum_age) {
+                int n = (sd - dd);
+                if (n > (60 * 60 * 24 * 2))
+                        die (STATE_CRITICAL,
+                          _("CRITICAL - Last modified %.1f days ago\n"),
+                          ((float) n) / (60 * 60 * 24));
+        else
+                die (STATE_CRITICAL,
+                    _("CRITICAL - Last modified %d:%02d:%02d ago\n"),
+                    n / (60 * 60), (n / 60) % 60, n % 60);
+    }
+
+    free (server_date);
+    free (document_date);
+  }
+}
+
+
+
 int
 check_http (void)
 {
@@ -561,6 +785,11 @@ check_http (void)
                 buffer[i] = '\0';
                 asprintf (&full_page, "%s%s", full_page, buffer);
                 pagesize += i;
+
+                if (no_body && document_headers_done (full_page)) {
+                  i = 0;
+                  break;
+                }
         }
 
         if (i < 0 && errno != ECONNRESET) {
@@ -621,7 +850,8 @@ check_http (void)
         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));
 
         /* make sure the status line matches the response we are looking for */
         if (!strstr (status_line, server_expect)) {
@@ -691,6 +921,10 @@ check_http (void)
 
         } /* end else (server_expect_yn)  */
                 
+        if (maximum_age >= 0) {
+          check_document_dates (header);
+        }
+
         /* check elapsed time */
         microsec = deltime (tv);
         elapsed_time = (double)microsec / 1.0e6;
@@ -1154,6 +1388,12 @@ certificate expiration times.\n"));
    URL to GET or POST (default: /)\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 document is more than SECONDS old. the number can also be of \n\
+   the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days.\n\
  -T, --content-type=STRING\n\
    specify Content-Type header media type when POSTing\n"), HTTP_EXPECT);
 
@@ -1226,6 +1466,6 @@ Usage: %s (-H <vhost> | -I <IP-address>) [-u <uri>] [-p <port>]\n\
   [-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] [-m min_pg_size] [-4|-6]\n"), progname);
+  [-P string] [-m min_pg_size] [-4|-6] [-N] [-M <age>]\n"), progname);
         printf (_(UT_HLP_VRS), progname, progname);
 }