93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2024
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/HttpDate.h"
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#include "td/utils/misc.h"
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#include "td/utils/Parser.h"
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#include "td/utils/Slice.h"
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namespace td {
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Result<int32> HttpDate::to_unix_time(int32 year, int32 month, int32 day, int32 hour, int32 minute, int32 second) {
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if (year < 1970 || year > 2037) {
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return Status::Error("Invalid year");
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}
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if (month < 1 || month > 12) {
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return Status::Error("Invalid month");
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}
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if (day < 1 || day > days_in_month(year, month)) {
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return Status::Error("Invalid day");
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}
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if (hour < 0 || hour >= 24) {
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return Status::Error("Invalid hour");
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}
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if (minute < 0 || minute >= 60) {
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return Status::Error("Invalid minute");
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}
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if (second < 0 || second > 60) {
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return Status::Error("Invalid second");
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}
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int32 res = 0;
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for (int32 y = 1970; y < year; y++) {
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res += (is_leap(y) + 365) * seconds_in_day();
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}
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for (int32 m = 1; m < month; m++) {
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res += days_in_month(year, m) * seconds_in_day();
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}
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res += (day - 1) * seconds_in_day();
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res += hour * 60 * 60;
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res += minute * 60;
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res += second;
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return res;
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}
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Result<int32> HttpDate::parse_http_date(string slice) {
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Parser p(slice);
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p.read_till(','); // ignore week day
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p.skip(',');
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p.skip_whitespaces();
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p.skip_nofail('0');
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TRY_RESULT(day, to_integer_safe<int32>(p.read_word()));
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auto month_name = p.read_word();
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to_lower_inplace(month_name);
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TRY_RESULT(year, to_integer_safe<int32>(p.read_word()));
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p.skip_whitespaces();
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p.skip_nofail('0');
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TRY_RESULT(hour, to_integer_safe<int32>(p.read_till(':')));
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p.skip(':');
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p.skip_nofail('0');
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TRY_RESULT(minute, to_integer_safe<int32>(p.read_till(':')));
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p.skip(':');
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p.skip_nofail('0');
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TRY_RESULT(second, to_integer_safe<int32>(p.read_word()));
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auto gmt = p.read_word();
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TRY_STATUS(std::move(p.status()));
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if (gmt != "GMT") {
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return Status::Error("Timezone must be GMT");
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}
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static Slice month_names[12] = {"jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec"};
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int month = 0;
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for (int m = 1; m <= 12; m++) {
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if (month_names[m - 1] == month_name) {
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month = m;
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break;
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}
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}
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if (month == 0) {
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return Status::Error("Unknown month name");
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}
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return to_unix_time(year, month, day, hour, minute, second);
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}
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} // namespace td
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