1 /*
2 * This File is part of Davix, The IO library for HTTP based protocols
3 * Copyright (C) 2013 Adrien Devresse <adrien.devresse@cern.ch>, CERN
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 */
20
21 #include <davix_internal_config.hpp>
22 #include "datetime_utils.hpp"
23
parse_http_date(const char * http_date)24 time_t parse_http_date(const char* http_date){
25 // TODO : possible issue with timezone != GMT,
26
27 static const char rfc1123[] = "%a, %d %b %Y %H:%M:%S GMT";
28 struct tm tm;
29 memset(&tm,0, sizeof(struct tm));
30
31 const char * p = strptime(http_date, rfc1123, &tm);
32 if ( p == NULL || *p != '\0'){
33 return -1;
34 }
35 return timegm(&tm);
36
37 }
38
39
parse_iso8601date(const char * iso_date)40 time_t parse_iso8601date(const char* iso_date){
41
42 // TODO : refactor to a regex parser.. ISO8601 b******* is impossible to parse correctly with strptime
43 struct tm tm_time;
44 char* p, *end_p;
45 memset(&tm_time,0, sizeof(struct tm ));
46 if( ( (p = strptime(iso_date, "%Y-%m-%dT%H:%M:%SZ", &tm_time) ) == NULL || *p != '\0')
47 && ( (p = strptime(iso_date, "%Y-%m-%dT%H:%M:%S", &tm_time) ) == NULL || *p != '.'
48 || *(iso_date + strlen(iso_date) -1) != 'Z' )){
49 if( (p = strptime(iso_date, "%Y-%m-%dT%H:%M:%S", &tm_time) ) != NULL
50 && (*p == '+' || *p == '-') ){
51 struct tm tm_time_offset;
52 memset(&tm_time_offset,0, sizeof(struct tm ));
53 if( ( ( end_p= strptime(p+1, "%H:%M", &tm_time_offset)) == NULL
54 || *end_p != '\0'
55 )
56 && ( (end_p =strptime(p+1, "%H%M", &tm_time_offset)) == NULL
57 || *end_p != '\0'
58 )
59 )
60 return -1;
61 if( *p =='+'){
62 tm_time.tm_hour += tm_time_offset.tm_hour;
63 tm_time.tm_min += tm_time_offset.tm_min;
64 } else{
65 tm_time.tm_hour -= tm_time_offset.tm_hour;
66 tm_time.tm_min -= tm_time_offset.tm_min;
67 }
68 }else{
69 return -1;
70 }
71 }
72
73
74 return timegm(&tm_time);
75 }
76
parse_standard_date(const char * http_date)77 time_t parse_standard_date(const char* http_date){
78 if(strchr(http_date, ',') != NULL){ // detect if rfc date or iso8601 date
79 return parse_http_date(http_date);
80 }else{
81 return parse_iso8601date(http_date);
82 }
83 }
84
current_time(const std::string format)85 std::string Davix::current_time(const std::string format) {
86 return Davix::time_as_string(time(NULL), format);
87 }
88
time_as_string(const time_t t,const std::string format)89 std::string Davix::time_as_string(const time_t t, const std::string format) {
90 struct tm utc;
91 char date[255];
92
93 date[254] = '\0';
94 #ifdef HAVE_GMTIME_R
95 gmtime_r(&t, &utc);
96 #else
97 struct tm* p_utc = gmtime(&t);
98 memcpy(&utc_current, p_utc, sizeof(struct tm));
99 #endif
100 strftime(date, 254, format.c_str(), &utc);
101 return std::string(date);
102 }
103
104