Mercurial > hg > nginx-quic
annotate src/core/ngx_times.c @ 7105:0846dd76a487
Stream: fixed logging UDP upstream timeout.
Previously, when the first UDP response packet was not received from the
proxied server within proxy_timeout, no error message was logged before
switching to the next upstream. Additionally, when one of succeeding response
packets was not received within the timeout, the timeout error had low severity
because it was logged as a client connection error as opposed to upstream
connection error.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Tue, 12 Sep 2017 13:44:04 +0300 |
parents | cdbcb73239ee |
children | 81fae70d6cb8 |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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12 /* |
563 | 13 * The time may be updated by signal handler or by several threads. |
14 * The time update operations are rare and require to hold the ngx_time_lock. | |
15 * The time read operations are frequent, so they are lock-free and get time | |
16 * values and strings from the current slot. Thus thread may get the corrupted | |
17 * values only if it is preempted while copying and then it is not scheduled | |
18 * to run more than NGX_TIME_SLOTS seconds. | |
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19 */ |
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20 |
563 | 21 #define NGX_TIME_SLOTS 64 |
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22 |
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23 static ngx_uint_t slot; |
563 | 24 static ngx_atomic_t ngx_time_lock; |
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25 |
563 | 26 volatile ngx_msec_t ngx_current_msec; |
27 volatile ngx_time_t *ngx_cached_time; | |
28 volatile ngx_str_t ngx_cached_err_log_time; | |
29 volatile ngx_str_t ngx_cached_http_time; | |
30 volatile ngx_str_t ngx_cached_http_log_time; | |
3873 | 31 volatile ngx_str_t ngx_cached_http_log_iso8601; |
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32 volatile ngx_str_t ngx_cached_syslog_time; |
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33 |
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34 #if !(NGX_WIN32) |
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35 |
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36 /* |
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37 * localtime() and localtime_r() are not Async-Signal-Safe functions, therefore, |
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38 * they must not be called by a signal handler, so we use the cached |
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39 * GMT offset value. Fortunately the value is changed only two times a year. |
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40 */ |
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41 |
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42 static ngx_int_t cached_gmtoff; |
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43 #endif |
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44 |
563 | 45 static ngx_time_t cached_time[NGX_TIME_SLOTS]; |
46 static u_char cached_err_log_time[NGX_TIME_SLOTS] | |
47 [sizeof("1970/09/28 12:00:00")]; | |
48 static u_char cached_http_time[NGX_TIME_SLOTS] | |
49 [sizeof("Mon, 28 Sep 1970 06:00:00 GMT")]; | |
50 static u_char cached_http_log_time[NGX_TIME_SLOTS] | |
51 [sizeof("28/Sep/1970:12:00:00 +0600")]; | |
3873 | 52 static u_char cached_http_log_iso8601[NGX_TIME_SLOTS] |
53 [sizeof("1970-09-28T12:00:00+06:00")]; | |
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54 static u_char cached_syslog_time[NGX_TIME_SLOTS] |
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55 [sizeof("Sep 28 12:00:00")]; |
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56 |
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58 static char *week[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }; |
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59 static char *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
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60 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; |
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61 |
501 | 62 void |
63 ngx_time_init(void) | |
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64 { |
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65 ngx_cached_err_log_time.len = sizeof("1970/09/28 12:00:00") - 1; |
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66 ngx_cached_http_time.len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1; |
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67 ngx_cached_http_log_time.len = sizeof("28/Sep/1970:12:00:00 +0600") - 1; |
3873 | 68 ngx_cached_http_log_iso8601.len = sizeof("1970-09-28T12:00:00+06:00") - 1; |
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69 ngx_cached_syslog_time.len = sizeof("Sep 28 12:00:00") - 1; |
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71 ngx_cached_time = &cached_time[0]; |
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72 |
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73 ngx_time_update(); |
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74 } |
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75 |
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76 |
563 | 77 void |
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78 ngx_time_update(void) |
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79 { |
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80 u_char *p0, *p1, *p2, *p3, *p4; |
563 | 81 ngx_tm_t tm, gmt; |
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82 time_t sec; |
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83 ngx_uint_t msec; |
563 | 84 ngx_time_t *tp; |
85 struct timeval tv; | |
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86 |
563 | 87 if (!ngx_trylock(&ngx_time_lock)) { |
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88 return; |
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89 } |
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90 |
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91 ngx_gettimeofday(&tv); |
563 | 92 |
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93 sec = tv.tv_sec; |
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94 msec = tv.tv_usec / 1000; |
563 | 95 |
96 ngx_current_msec = (ngx_msec_t) sec * 1000 + msec; | |
97 | |
98 tp = &cached_time[slot]; | |
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99 |
563 | 100 if (tp->sec == sec) { |
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101 tp->msec = msec; |
563 | 102 ngx_unlock(&ngx_time_lock); |
103 return; | |
104 } | |
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106 if (slot == NGX_TIME_SLOTS - 1) { |
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107 slot = 0; |
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108 } else { |
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109 slot++; |
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110 } |
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111 |
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112 tp = &cached_time[slot]; |
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113 |
563 | 114 tp->sec = sec; |
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115 tp->msec = msec; |
563 | 116 |
117 ngx_gmtime(sec, &gmt); | |
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120 p0 = &cached_http_time[slot][0]; |
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121 |
563 | 122 (void) ngx_sprintf(p0, "%s, %02d %s %4d %02d:%02d:%02d GMT", |
123 week[gmt.ngx_tm_wday], gmt.ngx_tm_mday, | |
124 months[gmt.ngx_tm_mon - 1], gmt.ngx_tm_year, | |
125 gmt.ngx_tm_hour, gmt.ngx_tm_min, gmt.ngx_tm_sec); | |
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126 |
469 | 127 #if (NGX_HAVE_GETTIMEZONE) |
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128 |
563 | 129 tp->gmtoff = ngx_gettimezone(); |
130 ngx_gmtime(sec + tp->gmtoff * 60, &tm); | |
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131 |
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132 #elif (NGX_HAVE_GMTOFF) |
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133 |
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134 ngx_localtime(sec, &tm); |
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135 cached_gmtoff = (ngx_int_t) (tm.ngx_tm_gmtoff / 60); |
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136 tp->gmtoff = cached_gmtoff; |
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137 |
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138 #else |
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140 ngx_localtime(sec, &tm); |
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141 cached_gmtoff = ngx_timezone(tm.ngx_tm_isdst); |
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142 tp->gmtoff = cached_gmtoff; |
178
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143 |
323
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144 #endif |
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145 |
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146 |
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147 p1 = &cached_err_log_time[slot][0]; |
323
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148 |
563 | 149 (void) ngx_sprintf(p1, "%4d/%02d/%02d %02d:%02d:%02d", |
517 | 150 tm.ngx_tm_year, tm.ngx_tm_mon, |
151 tm.ngx_tm_mday, tm.ngx_tm_hour, | |
152 tm.ngx_tm_min, tm.ngx_tm_sec); | |
182
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153 |
323
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154 |
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155 p2 = &cached_http_log_time[slot][0]; |
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156 |
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157 (void) ngx_sprintf(p2, "%02d/%s/%d:%02d:%02d:%02d %c%02i%02i", |
517 | 158 tm.ngx_tm_mday, months[tm.ngx_tm_mon - 1], |
159 tm.ngx_tm_year, tm.ngx_tm_hour, | |
160 tm.ngx_tm_min, tm.ngx_tm_sec, | |
563 | 161 tp->gmtoff < 0 ? '-' : '+', |
162 ngx_abs(tp->gmtoff / 60), ngx_abs(tp->gmtoff % 60)); | |
323
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163 |
3873 | 164 p3 = &cached_http_log_iso8601[slot][0]; |
165 | |
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166 (void) ngx_sprintf(p3, "%4d-%02d-%02dT%02d:%02d:%02d%c%02i:%02i", |
3873 | 167 tm.ngx_tm_year, tm.ngx_tm_mon, |
168 tm.ngx_tm_mday, tm.ngx_tm_hour, | |
169 tm.ngx_tm_min, tm.ngx_tm_sec, | |
170 tp->gmtoff < 0 ? '-' : '+', | |
171 ngx_abs(tp->gmtoff / 60), ngx_abs(tp->gmtoff % 60)); | |
172 | |
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173 p4 = &cached_syslog_time[slot][0]; |
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174 |
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175 (void) ngx_sprintf(p4, "%s %2d %02d:%02d:%02d", |
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176 months[tm.ngx_tm_mon - 1], tm.ngx_tm_mday, |
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177 tm.ngx_tm_hour, tm.ngx_tm_min, tm.ngx_tm_sec); |
266
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178 |
563 | 179 ngx_memory_barrier(); |
266
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180 |
563 | 181 ngx_cached_time = tp; |
182 ngx_cached_http_time.data = p0; | |
183 ngx_cached_err_log_time.data = p1; | |
184 ngx_cached_http_log_time.data = p2; | |
3873 | 185 ngx_cached_http_log_iso8601.data = p3; |
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186 ngx_cached_syslog_time.data = p4; |
563 | 187 |
188 ngx_unlock(&ngx_time_lock); | |
178
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189 } |
182
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190 |
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191 |
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192 #if !(NGX_WIN32) |
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193 |
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194 void |
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195 ngx_time_sigsafe_update(void) |
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196 { |
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197 u_char *p, *p2; |
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198 ngx_tm_t tm; |
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199 time_t sec; |
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200 ngx_time_t *tp; |
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201 struct timeval tv; |
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202 |
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203 if (!ngx_trylock(&ngx_time_lock)) { |
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204 return; |
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205 } |
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206 |
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207 ngx_gettimeofday(&tv); |
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208 |
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209 sec = tv.tv_sec; |
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210 |
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211 tp = &cached_time[slot]; |
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212 |
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213 if (tp->sec == sec) { |
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214 ngx_unlock(&ngx_time_lock); |
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215 return; |
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216 } |
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217 |
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218 if (slot == NGX_TIME_SLOTS - 1) { |
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219 slot = 0; |
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220 } else { |
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221 slot++; |
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222 } |
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223 |
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224 tp = &cached_time[slot]; |
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225 |
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226 tp->sec = 0; |
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227 |
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228 ngx_gmtime(sec + cached_gmtoff * 60, &tm); |
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229 |
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230 p = &cached_err_log_time[slot][0]; |
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231 |
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232 (void) ngx_sprintf(p, "%4d/%02d/%02d %02d:%02d:%02d", |
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233 tm.ngx_tm_year, tm.ngx_tm_mon, |
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234 tm.ngx_tm_mday, tm.ngx_tm_hour, |
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235 tm.ngx_tm_min, tm.ngx_tm_sec); |
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236 |
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237 p2 = &cached_syslog_time[slot][0]; |
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238 |
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239 (void) ngx_sprintf(p2, "%s %2d %02d:%02d:%02d", |
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240 months[tm.ngx_tm_mon - 1], tm.ngx_tm_mday, |
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241 tm.ngx_tm_hour, tm.ngx_tm_min, tm.ngx_tm_sec); |
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242 |
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243 ngx_memory_barrier(); |
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244 |
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245 ngx_cached_err_log_time.data = p; |
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246 ngx_cached_syslog_time.data = p2; |
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247 |
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248 ngx_unlock(&ngx_time_lock); |
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249 } |
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250 |
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251 #endif |
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252 |
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253 |
501 | 254 u_char * |
255 ngx_http_time(u_char *buf, time_t t) | |
182
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256 { |
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257 ngx_tm_t tm; |
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258 |
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259 ngx_gmtime(t, &tm); |
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260 |
455 | 261 return ngx_sprintf(buf, "%s, %02d %s %4d %02d:%02d:%02d GMT", |
262 week[tm.ngx_tm_wday], | |
263 tm.ngx_tm_mday, | |
264 months[tm.ngx_tm_mon - 1], | |
265 tm.ngx_tm_year, | |
266 tm.ngx_tm_hour, | |
267 tm.ngx_tm_min, | |
268 tm.ngx_tm_sec); | |
409
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269 } |
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270 |
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271 |
501 | 272 u_char * |
273 ngx_http_cookie_time(u_char *buf, time_t t) | |
409
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274 { |
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275 ngx_tm_t tm; |
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276 |
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277 ngx_gmtime(t, &tm); |
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278 |
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279 /* |
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280 * Netscape 3.x does not understand 4-digit years at all and |
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281 * 2-digit years more than "37" |
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282 */ |
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283 |
455 | 284 return ngx_sprintf(buf, |
285 (tm.ngx_tm_year > 2037) ? | |
286 "%s, %02d-%s-%d %02d:%02d:%02d GMT": | |
287 "%s, %02d-%s-%02d %02d:%02d:%02d GMT", | |
288 week[tm.ngx_tm_wday], | |
289 tm.ngx_tm_mday, | |
290 months[tm.ngx_tm_mon - 1], | |
291 (tm.ngx_tm_year > 2037) ? tm.ngx_tm_year: | |
292 tm.ngx_tm_year % 100, | |
293 tm.ngx_tm_hour, | |
294 tm.ngx_tm_min, | |
295 tm.ngx_tm_sec); | |
182
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296 } |
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297 |
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298 |
501 | 299 void |
300 ngx_gmtime(time_t t, ngx_tm_t *tp) | |
182
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301 { |
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302 ngx_int_t yday; |
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303 ngx_uint_t sec, min, hour, mday, mon, year, wday, days, leap; |
182
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304 |
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305 /* the calculation is valid for positive time_t only */ |
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306 |
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307 if (t < 0) { |
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308 t = 0; |
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309 } |
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310 |
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311 days = t / 86400; |
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312 sec = t % 86400; |
182
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313 |
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314 /* |
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315 * no more than 4 year digits supported, |
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316 * truncate to December 31, 9999, 23:59:59 |
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317 */ |
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318 |
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319 if (days > 2932896) { |
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320 days = 2932896; |
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321 sec = 86399; |
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322 } |
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323 |
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324 /* January 1, 1970 was Thursday */ |
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325 |
182
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326 wday = (4 + days) % 7; |
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327 |
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328 hour = sec / 3600; |
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329 sec %= 3600; |
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330 min = sec / 60; |
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331 sec %= 60; |
182
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332 |
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333 /* |
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334 * the algorithm based on Gauss' formula, |
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335 * see src/core/ngx_parse_time.c |
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336 */ |
208
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337 |
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338 /* days since March 1, 1 BC */ |
182
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339 days = days - (31 + 28) + 719527; |
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340 |
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341 /* |
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342 * The "days" should be adjusted to 1 only, however, some March 1st's go |
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343 * to previous year, so we adjust them to 2. This causes also shift of the |
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344 * last February days to next year, but we catch the case when "yday" |
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345 * becomes negative. |
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346 */ |
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347 |
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348 year = (days + 2) * 400 / (365 * 400 + 100 - 4 + 1); |
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349 |
182
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350 yday = days - (365 * year + year / 4 - year / 100 + year / 400); |
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351 |
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352 if (yday < 0) { |
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353 leap = (year % 4 == 0) && (year % 100 || (year % 400 == 0)); |
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354 yday = 365 + leap + yday; |
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355 year--; |
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356 } |
182
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357 |
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358 /* |
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359 * The empirical formula that maps "yday" to month. |
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360 * There are at least 10 variants, some of them are: |
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361 * mon = (yday + 31) * 15 / 459 |
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362 * mon = (yday + 31) * 17 / 520 |
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363 * mon = (yday + 31) * 20 / 612 |
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364 */ |
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365 |
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366 mon = (yday + 31) * 10 / 306; |
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367 |
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368 /* the Gauss' formula that evaluates days before the month */ |
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369 |
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370 mday = yday - (367 * mon / 12 - 30) + 1; |
182
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371 |
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372 if (yday >= 306) { |
441
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373 |
1970
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374 year++; |
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375 mon -= 10; |
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376 |
297
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377 /* |
324
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378 * there is no "yday" in Win32 SYSTEMTIME |
297
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379 * |
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380 * yday -= 306; |
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381 */ |
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382 |
1970
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383 } else { |
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384 |
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385 mon += 2; |
182
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386 |
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387 /* |
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388 * there is no "yday" in Win32 SYSTEMTIME |
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389 * |
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390 * yday += 31 + 28 + leap; |
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391 */ |
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392 } |
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393 |
290
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394 tp->ngx_tm_sec = (ngx_tm_sec_t) sec; |
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395 tp->ngx_tm_min = (ngx_tm_min_t) min; |
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396 tp->ngx_tm_hour = (ngx_tm_hour_t) hour; |
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397 tp->ngx_tm_mday = (ngx_tm_mday_t) mday; |
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398 tp->ngx_tm_mon = (ngx_tm_mon_t) mon; |
87e73f067470
nginx-0.0.2-2004-03-16-10:10:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
271
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changeset
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399 tp->ngx_tm_year = (ngx_tm_year_t) year; |
87e73f067470
nginx-0.0.2-2004-03-16-10:10:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
271
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changeset
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400 tp->ngx_tm_wday = (ngx_tm_wday_t) wday; |
182
3c49eaf3f522
nginx-0.0.1-2003-11-13-09:14:05 import
Igor Sysoev <igor@sysoev.ru>
parents:
181
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changeset
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401 } |
2162 | 402 |
403 | |
404 time_t | |
405 ngx_next_time(time_t when) | |
406 { | |
407 time_t now, next; | |
408 struct tm tm; | |
409 | |
410 now = ngx_time(); | |
411 | |
412 ngx_libc_localtime(now, &tm); | |
413 | |
414 tm.tm_hour = (int) (when / 3600); | |
415 when %= 3600; | |
416 tm.tm_min = (int) (when / 60); | |
417 tm.tm_sec = (int) (when % 60); | |
418 | |
419 next = mktime(&tm); | |
420 | |
421 if (next == -1) { | |
422 return -1; | |
423 } | |
424 | |
425 if (next - now > 0) { | |
426 return next; | |
427 } | |
428 | |
429 tm.tm_mday++; | |
430 | |
431 /* mktime() should normalize a date (Jan 32, etc) */ | |
432 | |
433 next = mktime(&tm); | |
434 | |
435 if (next != -1) { | |
436 return next; | |
437 } | |
438 | |
439 return -1; | |
440 } |