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-rw-r--r--functions20.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/functions20.h b/functions20.h
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1/* functions */
2static const char *extract_request_time_custom(request_rec *r, char *a,
3 apr_time_exp_t *xt)
4{
5 apr_size_t retcode;
6 char tstr[MAX_STRING_LEN];
7 apr_strftime(tstr, &retcode, sizeof(tstr), a, xt);
8 return apr_pstrdup(r->pool, tstr);
9}
10
11#define DEFAULT_REQUEST_TIME_SIZE 32
12typedef struct {
13 unsigned t;
14 char timestr[DEFAULT_REQUEST_TIME_SIZE];
15 unsigned t_validate;
16} cached_request_time;
17
18#define TIME_CACHE_SIZE 4
19#define TIME_CACHE_MASK 3
20static cached_request_time request_time_cache[TIME_CACHE_SIZE];
21
22static const char *extract_request_time(request_rec *r, char *a)
23{
24 apr_time_exp_t xt;
25
26 /* Please read comments in mod_log_config.h for more info about
27 * the I_INSIST....COMPLIANCE define
28 */
29 if (a && *a) { /* Custom format */
30#ifdef I_INSIST_ON_EXTRA_CYCLES_FOR_CLF_COMPLIANCE
31 ap_explode_recent_localtime(&xt, apr_time_now());
32#else
33 ap_explode_recent_localtime(&xt, r->request_time);
34#endif
35 return extract_request_time_custom(r, a, &xt);
36 } else { /* CLF format */
37 /* This code uses the same technique as ap_explode_recent_localtime():
38 * optimistic caching with logic to detect and correct race conditions.
39 * See the comments in server/util_time.c for more information.
40 */
41 cached_request_time* cached_time = apr_palloc(r->pool,
42 sizeof(*cached_time));
43#ifdef I_INSIST_ON_EXTRA_CYCLES_FOR_CLF_COMPLIANCE
44 apr_time_t request_time = apr_time_now();
45#else
46 apr_time_t request_time = r->request_time;
47#endif
48 unsigned t_seconds = (unsigned)apr_time_sec(request_time);
49 unsigned i = t_seconds & TIME_CACHE_MASK;
50 memcpy(cached_time, &(request_time_cache[i]), sizeof(*cached_time));
51 if ((t_seconds != cached_time->t) ||
52 (t_seconds != cached_time->t_validate)) {
53
54 /* Invalid or old snapshot, so compute the proper time string
55 * and store it in the cache
56 */
57 char sign;
58 int timz;
59
60 ap_explode_recent_localtime(&xt, r->request_time);
61 timz = xt.tm_gmtoff;
62 if (timz < 0) {
63 timz = -timz;
64 sign = '-';
65 }
66 else {
67 sign = '+';
68 }
69 cached_time->t = t_seconds;
70 apr_snprintf(cached_time->timestr, DEFAULT_REQUEST_TIME_SIZE,
71 "[%02d/%s/%d:%02d:%02d:%02d %c%.2d%.2d]",
72 xt.tm_mday, apr_month_snames[xt.tm_mon],
73 xt.tm_year+1900, xt.tm_hour, xt.tm_min, xt.tm_sec,
74 sign, timz / (60*60), timz % (60*60));
75 cached_time->t_validate = t_seconds;
76 memcpy(&(request_time_cache[i]), cached_time,
77 sizeof(*cached_time));
78 }
79 return cached_time->timestr;
80 }
81}
82
83static const char *extract_request_duration(request_rec *r, char *a)
84{
85 apr_time_t duration = apr_time_now() - r->request_time;
86 return apr_psprintf(r->pool, "%" APR_TIME_T_FMT, apr_time_sec(duration));
87}
88
89static const char *extract_request_timestamp(request_rec *r, char *a)
90{
91 return apr_psprintf(r->pool, "%"APR_TIME_T_FMT, apr_time_sec(apr_time_now()));
92}