dateparse/parseany.go

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package dateparse
import (
"fmt"
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"strconv"
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"time"
"unicode"
)
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type DateState int
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const (
// C = Comma
// O = Colon
// E = Period/Dot
// A = Alpha
// N = Digits/Numeric
// S = Slash /
// P = Plus +
// m = Minus, Dash, -
// T = T
// Z = Z
// M = AM/PM
// W = Whitespace
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ST_START DateState = iota
ST_DIGIT
ST_DIGITDASH
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ST_DIGITDASHALPHA
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ST_DIGITDASHWS
ST_DIGITDASHWSWS
ST_DIGITDASHWSWSAMPMMAYBE
ST_DIGITDASHWSWSOFFSET
ST_DIGITDASHWSWSOFFSETALPHA
ST_DIGITDASHWSWSOFFSETCOLONALPHA
ST_DIGITDASHWSWSOFFSETCOLON
ST_DIGITDASHWSOFFSET
ST_DIGITDASHWSWSALPHA
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ST_DIGITDASHWSDOT
ST_DIGITDASHWSDOTALPHA
ST_DIGITDASHWSDOTOFFSET
ST_DIGITDASHWSDOTOFFSETALPHA
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ST_DIGITDASHT
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ST_DIGITDASHTZ
ST_DIGITDASHTZDIGIT
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ST_DIGITDASHTDELTA
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ST_DIGITDASHTDELTACOLON
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ST_DIGITSLASH
ST_DIGITSLASHWS
ST_DIGITSLASHWSCOLON
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ST_DIGITSLASHWSCOLONAMPM
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ST_DIGITSLASHWSCOLONCOLON
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ST_DIGITSLASHWSCOLONCOLONAMPM
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ST_DIGITALPHA
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ST_ALPHA
ST_ALPHAWS
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ST_ALPHAWSDIGITCOMMA
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ST_ALPHAWSALPHA
ST_ALPHAWSALPHACOLON
ST_ALPHAWSALPHACOLONOFFSET
ST_ALPHAWSALPHACOLONALPHA
ST_ALPHAWSALPHACOLONALPHAOFFSET
ST_ALPHAWSALPHACOLONALPHAOFFSETALPHA
ST_WEEKDAYCOMMA
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ST_WEEKDAYCOMMADELTA
ST_WEEKDAYABBREVCOMMA
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ST_WEEKDAYABBREVCOMMADELTA
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ST_WEEKDAYABBREVCOMMADELTAZONE
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)
var (
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shortDates = []string{"01/02/2006", "1/2/2006", "06/01/02", "01/02/06", "1/2/06"}
)
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// MustParse Parse a date, and panic if it can't be parsed
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func MustParse(datestr string) time.Time {
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t, err := parseTime(datestr, nil)
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if err != nil {
panic(err.Error())
}
return t
}
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// ParseAny Given an unknown date format, detect the layout, parse.
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func ParseAny(datestr string) (time.Time, error) {
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return parseTime(datestr, nil)
}
// ParseIn Given an unknown date format, detect the layout,
// using given location, parse.
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//
// If no recognized Timezone/Offset info exists in the datestring, it uses
// given location. IF there IS timezone/offset info it uses the given location
// info for any zone interpretation. That is, MST means one thing when using
// America/Denver and something else in other locations.
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func ParseIn(datestr string, loc *time.Location) (time.Time, error) {
return parseTime(datestr, loc)
}
// ParseLocal Given an unknown date format, detect the layout,
// using time.Local, parse.
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//
// If no recognized Timezone/Offset info exists in the datestring, it uses
// given location. IF there IS timezone/offset info it uses the given location
// info for any zone interpretation. That is, MST means one thing when using
// America/Denver and something else in other locations.
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func ParseLocal(datestr string) (time.Time, error) {
return parseTime(datestr, time.Local)
}
func parse(layout, datestr string, loc *time.Location) (time.Time, error) {
if loc == nil {
return time.Parse(layout, datestr)
}
return time.ParseInLocation(layout, datestr, loc)
}
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func parseTime(datestr string, loc *time.Location) (time.Time, error) {
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state := ST_START
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firstSlash := 0
// General strategy is to read rune by rune through the date looking for
// certain hints of what type of date we are dealing with.
// Hopefully we only need to read about 5 or 6 bytes before
// we figure it out and then attempt a parse
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iterRunes:
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for i := 0; i < len(datestr); i++ {
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r := rune(datestr[i])
// r, bytesConsumed := utf8.DecodeRuneInString(datestr[ri:])
// if bytesConsumed > 1 {
// ri += (bytesConsumed - 1)
// }
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switch state {
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case ST_START:
if unicode.IsDigit(r) {
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state = ST_DIGIT
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} else if unicode.IsLetter(r) {
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state = ST_ALPHA
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}
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case ST_DIGIT: // starts digits
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if unicode.IsDigit(r) {
continue
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} else if unicode.IsLetter(r) {
state = ST_DIGITALPHA
continue
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}
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switch r {
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case '-', '\u2212':
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state = ST_DIGITDASH
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case '/':
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state = ST_DIGITSLASH
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firstSlash = i
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}
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case ST_DIGITDASH: // starts digit then dash 02-
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// 2006-01-02T15:04:05Z07:00
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// 2017-06-25T17:46:57.45706582-07:00
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// 2006-01-02T15:04:05.999999999Z07:00
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// 2006-01-02T15:04:05+0000
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// 2012-08-03 18:31:59.257000000
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// 2014-04-26 17:24:37.3186369
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// 2017-01-27 00:07:31.945167
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// 2016-03-14 00:00:00.000
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// 2014-05-11 08:20:13,787
// 2017-07-19 03:21:51+00:00
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// 2006-01-02
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// 2013-04-01 22:43:22
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// 2014-04-26 05:24:37 PM
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// 2013-Feb-03
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switch {
case r == ' ':
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state = ST_DIGITDASHWS
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case r == 'T':
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state = ST_DIGITDASHT
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default:
if unicode.IsLetter(r) {
state = ST_DIGITDASHALPHA
break iterRunes
}
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}
case ST_DIGITDASHWS:
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// 2013-04-01 22:43:22
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// 2014-05-11 08:20:13,787
// ST_DIGITDASHWSWS
// 2014-04-26 05:24:37 PM
// 2014-12-16 06:20:00 UTC
// 2015-02-18 00:12:00 +0000 UTC
// 2006-01-02 15:04:05 -0700
// 2006-01-02 15:04:05 -07:00
// ST_DIGITDASHWSOFFSET
// 2017-07-19 03:21:51+00:00
// ST_DIGITDASHWSDOT
// 2014-04-26 17:24:37.3186369
// 2017-01-27 00:07:31.945167
// 2012-08-03 18:31:59.257000000
// 2016-03-14 00:00:00.000
// ST_DIGITDASHWSDOTOFFSET
// 2017-01-27 00:07:31.945167 +0000
// 2016-03-14 00:00:00.000 +0000
// ST_DIGITDASHWSDOTOFFSETALPHA
// 2017-01-27 00:07:31.945167 +0000 UTC
// 2016-03-14 00:00:00.000 +0000 UTC
// ST_DIGITDASHWSDOTALPHA
// 2014-12-16 06:20:00.000 UTC
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switch r {
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case ',':
if len(datestr) == len("2014-05-11 08:20:13,787") {
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// go doesn't seem to parse this one natively? or did i miss it?
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t, err := parse("2006-01-02 03:04:05", datestr[:i], loc)
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if err == nil {
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ms, err := strconv.Atoi(datestr[i+1:])
if err == nil {
return time.Unix(0, t.UnixNano()+int64(ms)*1e6), nil
}
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}
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return t, err
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}
case '-', '+':
state = ST_DIGITDASHWSOFFSET
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case '.':
state = ST_DIGITDASHWSDOT
case ' ':
state = ST_DIGITDASHWSWS
}
case ST_DIGITDASHWSWS:
// ST_DIGITDASHWSWSALPHA
// 2014-12-16 06:20:00 UTC
// ST_DIGITDASHWSWSAMPMMAYBE
// 2014-04-26 05:24:37 PM
// ST_DIGITDASHWSWSOFFSET
// 2006-01-02 15:04:05 -0700
// ST_DIGITDASHWSWSOFFSETCOLON
// 2006-01-02 15:04:05 -07:00
// ST_DIGITDASHWSWSOFFSETCOLONALPHA
// 2015-02-18 00:12:00 +00:00 UTC
// ST_DIGITDASHWSWSOFFSETALPHA
// 2015-02-18 00:12:00 +0000 UTC
switch r {
case 'A', 'P':
state = ST_DIGITDASHWSWSAMPMMAYBE
case '+', '-':
state = ST_DIGITDASHWSWSOFFSET
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default:
if unicode.IsLetter(r) {
// 2014-12-16 06:20:00 UTC
state = ST_DIGITDASHWSWSALPHA
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break iterRunes
}
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}
case ST_DIGITDASHWSWSAMPMMAYBE:
if r == 'M' {
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return parse("2006-01-02 03:04:05 PM", datestr, loc)
}
state = ST_DIGITDASHWSWSALPHA
case ST_DIGITDASHWSWSOFFSET:
// ST_DIGITDASHWSWSOFFSET
// 2006-01-02 15:04:05 -0700
// ST_DIGITDASHWSWSOFFSETCOLON
// 2006-01-02 15:04:05 -07:00
// ST_DIGITDASHWSWSOFFSETCOLONALPHA
// 2015-02-18 00:12:00 +00:00 UTC
// ST_DIGITDASHWSWSOFFSETALPHA
// 2015-02-18 00:12:00 +0000 UTC
if r == ':' {
state = ST_DIGITDASHWSWSOFFSETCOLON
} else if unicode.IsLetter(r) {
// 2015-02-18 00:12:00 +0000 UTC
state = ST_DIGITDASHWSWSOFFSETALPHA
break iterRunes
}
case ST_DIGITDASHWSWSOFFSETCOLON:
// ST_DIGITDASHWSWSOFFSETCOLON
// 2006-01-02 15:04:05 -07:00
// ST_DIGITDASHWSWSOFFSETCOLONALPHA
// 2015-02-18 00:12:00 +00:00 UTC
if unicode.IsLetter(r) {
// 2015-02-18 00:12:00 +00:00 UTC
state = ST_DIGITDASHWSWSOFFSETCOLONALPHA
break iterRunes
}
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case ST_DIGITDASHWSDOT:
// 2014-04-26 17:24:37.3186369
// 2017-01-27 00:07:31.945167
// 2012-08-03 18:31:59.257000000
// 2016-03-14 00:00:00.000
// ST_DIGITDASHWSDOTOFFSET
// 2017-01-27 00:07:31.945167 +0000
// 2016-03-14 00:00:00.000 +0000
// ST_DIGITDASHWSDOTOFFSETALPHA
// 2017-01-27 00:07:31.945167 +0000 UTC
// 2016-03-14 00:00:00.000 +0000 UTC
// ST_DIGITDASHWSDOTALPHA
// 2014-12-16 06:20:00.000 UTC
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if unicode.IsLetter(r) {
// 2014-12-16 06:20:00.000 UTC
state = ST_DIGITDASHWSDOTALPHA
break iterRunes
} else if r == '+' || r == '-' {
state = ST_DIGITDASHWSDOTOFFSET
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}
case ST_DIGITDASHWSDOTOFFSET:
// 2017-01-27 00:07:31.945167 +0000
// 2016-03-14 00:00:00.000 +0000
// ST_DIGITDASHWSDOTOFFSETALPHA
// 2017-01-27 00:07:31.945167 +0000 UTC
// 2016-03-14 00:00:00.000 +0000 UTC
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if unicode.IsLetter(r) {
// 2014-12-16 06:20:00.000 UTC
// 2017-01-27 00:07:31.945167 +0000 UTC
// 2016-03-14 00:00:00.000 +0000 UTC
state = ST_DIGITDASHWSDOTOFFSETALPHA
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break iterRunes
}
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case ST_DIGITDASHT: // starts digit then dash 02- then T
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// ST_DIGITDASHT
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// 2006-01-02T15:04:05
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// ST_DIGITDASHTZ
// 2006-01-02T15:04:05.999999999Z
// 2006-01-02T15:04:05.99999999Z
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// 2006-01-02T15:04:05.9999999Z
// 2006-01-02T15:04:05.999999Z
// 2006-01-02T15:04:05.99999Z
// 2006-01-02T15:04:05.9999Z
// 2006-01-02T15:04:05.999Z
// 2006-01-02T15:04:05.99Z
// 2009-08-12T22:15Z
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// ST_DIGITDASHTZDIGIT
// 2006-01-02T15:04:05.999999999Z07:00
// 2006-01-02T15:04:05Z07:00
// With another dash aka time-zone at end
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// ST_DIGITDASHTDELTA
// ST_DIGITDASHTDELTACOLON
// 2017-06-25T17:46:57.45706582-07:00
// 2017-06-25T17:46:57+04:00
// 2006-01-02T15:04:05+0000
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switch r {
case '-', '+':
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state = ST_DIGITDASHTDELTA
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case 'Z':
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state = ST_DIGITDASHTZ
}
case ST_DIGITDASHTZ:
if unicode.IsDigit(r) {
state = ST_DIGITDASHTZDIGIT
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}
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case ST_DIGITDASHTDELTA:
if r == ':' {
state = ST_DIGITDASHTDELTACOLON
}
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case ST_DIGITSLASH: // starts digit then slash 02/
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// 2014/07/10 06:55:38.156283
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// 03/19/2012 10:11:59
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// 04/2/2014 03:00:37
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// 3/1/2012 10:11:59
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// 4/8/2014 22:05
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// 3/1/2014
// 10/13/2014
// 01/02/2006
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// 1/2/06
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if unicode.IsDigit(r) || r == '/' {
continue
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}
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switch r {
case ' ':
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state = ST_DIGITSLASHWS
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}
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case ST_DIGITSLASHWS: // starts digit then slash 02/ more digits/slashes then whitespace
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// 2014/07/10 06:55:38.156283
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// 03/19/2012 10:11:59
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// 04/2/2014 03:00:37
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// 3/1/2012 10:11:59
// 4/8/2014 22:05
switch r {
case ':':
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state = ST_DIGITSLASHWSCOLON
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}
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case ST_DIGITSLASHWSCOLON: // starts digit then slash 02/ more digits/slashes then whitespace
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// 2014/07/10 06:55:38.156283
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// 03/19/2012 10:11:59
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// 04/2/2014 03:00:37
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// 3/1/2012 10:11:59
// 4/8/2014 22:05
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// 3/1/2012 10:11:59 AM
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switch r {
case ':':
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state = ST_DIGITSLASHWSCOLONCOLON
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case 'A', 'P':
state = ST_DIGITSLASHWSCOLONAMPM
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}
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case ST_DIGITSLASHWSCOLONCOLON: // starts digit then slash 02/ more digits/slashes then whitespace
// 2014/07/10 06:55:38.156283
// 03/19/2012 10:11:59
// 04/2/2014 03:00:37
// 3/1/2012 10:11:59
// 4/8/2014 22:05
// 3/1/2012 10:11:59 AM
switch r {
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case 'A', 'P':
state = ST_DIGITSLASHWSCOLONCOLONAMPM
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}
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case ST_DIGITALPHA:
// 12 Feb 2006, 19:17
// 12 Feb 2006, 19:17:22
switch {
case len(datestr) == len("02 Jan 2006, 15:04"):
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return parse("02 Jan 2006, 15:04", datestr, loc)
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case len(datestr) == len("02 Jan 2006, 15:04:05"):
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return parse("02 Jan 2006, 15:04:05", datestr, loc)
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}
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case ST_ALPHA: // starts alpha
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// ST_ALPHAWS
// Mon Jan _2 15:04:05 2006
// Mon Jan _2 15:04:05 MST 2006
// Mon Jan 02 15:04:05 -0700 2006
// Mon Aug 10 15:44:11 UTC+0100 2015
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
// ST_ALPHAWSDIGITCOMMA
// May 8, 2009 5:57:51 PM
//
// ST_WEEKDAYCOMMA
// Monday, 02-Jan-06 15:04:05 MST
// ST_WEEKDAYCOMMADELTA
// Monday, 02 Jan 2006 15:04:05 -0700
// Monday, 02 Jan 2006 15:04:05 +0100
// ST_WEEKDAYABBREVCOMMA
// Mon, 02-Jan-06 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 MST
// ST_WEEKDAYABBREVCOMMADELTA
// Mon, 02 Jan 2006 15:04:05 -0700
// Thu, 13 Jul 2017 08:58:40 +0100
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// ST_WEEKDAYABBREVCOMMADELTAZONE
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
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switch {
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case unicode.IsLetter(r):
continue
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case r == ' ':
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state = ST_ALPHAWS
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case r == ',':
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if i == 3 {
state = ST_WEEKDAYABBREVCOMMA
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} else {
state = ST_WEEKDAYCOMMA
}
}
case ST_WEEKDAYCOMMA: // Starts alpha then comma
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// Mon, 02-Jan-06 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 MST
// ST_WEEKDAYCOMMADELTA
// Monday, 02 Jan 2006 15:04:05 -0700
// Monday, 02 Jan 2006 15:04:05 +0100
switch {
case r == '-':
if i < 15 {
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return parse("Monday, 02-Jan-06 15:04:05 MST", datestr, loc)
} else {
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state = ST_WEEKDAYCOMMADELTA
}
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case r == '+':
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state = ST_WEEKDAYCOMMADELTA
}
case ST_WEEKDAYABBREVCOMMA: // Starts alpha then comma
// Mon, 02-Jan-06 15:04:05 MST
2017-07-14 00:11:41 +08:00
// Mon, 02 Jan 2006 15:04:05 MST
// ST_WEEKDAYABBREVCOMMADELTA
// Mon, 02 Jan 2006 15:04:05 -0700
// Thu, 13 Jul 2017 08:58:40 +0100
2017-07-14 22:02:22 +08:00
// ST_WEEKDAYABBREVCOMMADELTAZONE
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
switch {
case r == '-':
if i < 15 {
2017-07-27 07:42:12 +08:00
return parse("Mon, 02-Jan-06 15:04:05 MST", datestr, loc)
} else {
2017-07-14 00:11:41 +08:00
state = ST_WEEKDAYABBREVCOMMADELTA
}
2017-07-14 00:11:41 +08:00
case r == '+':
state = ST_WEEKDAYABBREVCOMMADELTA
2014-05-07 12:15:43 +08:00
}
2017-07-14 22:02:22 +08:00
case ST_WEEKDAYABBREVCOMMADELTA:
// ST_WEEKDAYABBREVCOMMADELTA
// Mon, 02 Jan 2006 15:04:05 -0700
// Thu, 13 Jul 2017 08:58:40 +0100
// ST_WEEKDAYABBREVCOMMADELTAZONE
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
if r == '(' {
state = ST_WEEKDAYABBREVCOMMADELTAZONE
}
2014-05-21 13:08:25 +08:00
case ST_ALPHAWS: // Starts alpha then whitespace
2015-07-04 01:27:48 +08:00
// Mon Jan _2 15:04:05 2006
// Mon Jan _2 15:04:05 MST 2006
// Mon Jan 02 15:04:05 -0700 2006
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
2015-08-11 01:54:01 +08:00
// Mon Aug 10 15:44:11 UTC+0100 2015
2014-05-07 12:15:43 +08:00
switch {
case unicode.IsLetter(r):
2014-05-21 13:53:52 +08:00
state = ST_ALPHAWSALPHA
2017-07-14 00:11:41 +08:00
case unicode.IsDigit(r):
state = ST_ALPHAWSDIGITCOMMA
2014-05-21 13:53:52 +08:00
}
2017-07-14 00:11:41 +08:00
case ST_ALPHAWSDIGITCOMMA: // Starts Alpha, whitespace, digit, comma
2014-05-07 12:15:43 +08:00
// May 8, 2009 5:57:51 PM
2017-07-27 07:42:12 +08:00
return parse("Jan 2, 2006 3:04:05 PM", datestr, loc)
case ST_ALPHAWSALPHA: // Alpha, whitespace, alpha
2015-07-04 01:27:48 +08:00
// Mon Jan _2 15:04:05 2006
// Mon Jan 02 15:04:05 -0700 2006
2015-07-04 01:27:48 +08:00
// Mon Jan _2 15:04:05 MST 2006
// Mon Aug 10 15:44:11 UTC+0100 2015
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
if r == ':' {
state = ST_ALPHAWSALPHACOLON
}
case ST_ALPHAWSALPHACOLON: // Alpha, whitespace, alpha, :
// Mon Jan _2 15:04:05 2006
2015-07-04 01:27:48 +08:00
// Mon Jan 02 15:04:05 -0700 2006
// Mon Jan _2 15:04:05 MST 2006
2015-08-11 01:54:01 +08:00
// Mon Aug 10 15:44:11 UTC+0100 2015
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
if unicode.IsLetter(r) {
state = ST_ALPHAWSALPHACOLONALPHA
} else if r == '-' || r == '+' {
state = ST_ALPHAWSALPHACOLONOFFSET
}
case ST_ALPHAWSALPHACOLONALPHA: // Alpha, whitespace, alpha, :, alpha
// Mon Jan _2 15:04:05 MST 2006
// Mon Aug 10 15:44:11 UTC+0100 2015
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
if r == '+' {
state = ST_ALPHAWSALPHACOLONALPHAOFFSET
}
case ST_ALPHAWSALPHACOLONALPHAOFFSET: // Alpha, whitespace, alpha, : , alpha, offset, ?
// Mon Aug 10 15:44:11 UTC+0100 2015
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
if unicode.IsLetter(r) {
state = ST_ALPHAWSALPHACOLONALPHAOFFSETALPHA
2014-05-21 13:53:52 +08:00
}
2014-05-07 12:15:43 +08:00
default:
break iterRunes
2014-04-21 10:56:17 +08:00
}
2014-05-07 12:15:43 +08:00
}
switch state {
2014-05-21 13:08:25 +08:00
case ST_DIGIT:
2014-05-07 12:15:43 +08:00
// unixy timestamps ish
2017-07-14 10:57:15 +08:00
// 1499979655583057426 nanoseconds
// 1499979795437000 micro-seconds
// 1499979795437 milliseconds
2015-08-19 06:50:04 +08:00
// 1384216367189
// 1332151919 seconds
// 20140601 yyyymmdd
2016-03-02 05:25:00 +08:00
// 2014 yyyy
2017-07-14 10:57:15 +08:00
if len(datestr) > len("1499979795437000") {
2014-04-26 07:59:10 +08:00
if nanoSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
return time.Unix(0, nanoSecs), nil
}
2017-07-14 10:57:15 +08:00
} else if len(datestr) > len("1499979795437") {
2014-05-07 12:15:43 +08:00
if microSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
return time.Unix(0, microSecs*1000), nil
}
2017-07-14 10:57:15 +08:00
} else if len(datestr) > len("1332151919") {
2014-10-08 09:30:17 +08:00
if miliSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
return time.Unix(0, miliSecs*1000*1000), nil
}
2015-08-19 06:50:04 +08:00
} else if len(datestr) == len("20140601") {
2017-07-27 07:42:12 +08:00
return parse("20060102", datestr, loc)
2016-03-02 05:25:00 +08:00
} else if len(datestr) == len("2014") {
2017-07-27 07:42:12 +08:00
return parse("2006", datestr, loc)
2014-04-26 07:59:10 +08:00
} else {
if secs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
return time.Unix(secs, 0), nil
}
}
2014-05-21 13:08:25 +08:00
case ST_DIGITDASH: // starts digit then dash 02-
2014-05-07 12:15:43 +08:00
// 2006-01-02
2016-03-02 05:25:00 +08:00
// 2006-01
2014-05-07 12:15:43 +08:00
if len(datestr) == len("2014-04-26") {
2017-07-27 07:42:12 +08:00
return parse("2006-01-02", datestr, loc)
2016-03-02 05:25:00 +08:00
} else if len(datestr) == len("2014-04") {
2017-07-27 07:42:12 +08:00
return parse("2006-01", datestr, loc)
2014-05-07 12:15:43 +08:00
}
2017-07-27 07:55:21 +08:00
case ST_DIGITDASHALPHA:
// 2013-Feb-03
return parse("2006-Jan-02", datestr, loc)
2017-07-12 04:40:58 +08:00
case ST_DIGITDASHTDELTA:
2017-07-18 05:46:18 +08:00
// 2006-01-02T15:04:05+0000
2017-07-27 07:42:12 +08:00
return parse("2006-01-02T15:04:05-0700", datestr, loc)
2017-07-18 05:46:18 +08:00
case ST_DIGITDASHTDELTACOLON:
2017-07-12 04:40:58 +08:00
// With another +/- time-zone at end
2017-07-12 02:00:40 +08:00
// 2006-01-02T15:04:05.999999999+07:00
2017-07-12 04:40:58 +08:00
// 2006-01-02T15:04:05.999999999-07:00
2017-07-12 02:00:40 +08:00
// 2006-01-02T15:04:05.999999+07:00
2017-07-12 04:40:58 +08:00
// 2006-01-02T15:04:05.999999-07:00
2017-07-12 02:00:40 +08:00
// 2006-01-02T15:04:05.999+07:00
2017-07-12 04:40:58 +08:00
// 2006-01-02T15:04:05.999-07:00
2017-07-12 02:00:40 +08:00
// 2006-01-02T15:04:05+07:00
2017-07-12 04:40:58 +08:00
// 2006-01-02T15:04:05-07:00
2017-07-27 07:42:12 +08:00
return parse("2006-01-02T15:04:05-07:00", datestr, loc)
2017-07-14 10:57:15 +08:00
2017-06-26 10:09:06 +08:00
case ST_DIGITDASHT: // starts digit then dash 02- then T
// 2006-01-02T15:04:05.999999
// 2006-01-02T15:04:05.999999
2017-07-27 07:42:12 +08:00
return parse("2006-01-02T15:04:05", datestr, loc)
2017-07-14 10:57:15 +08:00
case ST_DIGITDASHTZDIGIT:
// With a time-zone at end after Z
// 2006-01-02T15:04:05.999999999Z07:00
// 2006-01-02T15:04:05Z07:00
// RFC3339 = "2006-01-02T15:04:05Z07:00"
// RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00"
return time.Time{}, fmt.Errorf("RFC339 Dates may not contain both Z & Offset for %q see https://github.com/golang/go/issues/5294", datestr)
2017-06-26 10:09:06 +08:00
case ST_DIGITDASHTZ: // starts digit then dash 02- then T Then Z
// 2006-01-02T15:04:05.999999999Z
// 2006-01-02T15:04:05.99999999Z
// 2006-01-02T15:04:05.9999999Z
// 2006-01-02T15:04:05.999999Z
// 2006-01-02T15:04:05.99999Z
// 2006-01-02T15:04:05.9999Z
// 2006-01-02T15:04:05.999Z
// 2006-01-02T15:04:05.99Z
// 2009-08-12T22:15Z -- No seconds/milliseconds
switch len(datestr) {
case len("2009-08-12T22:15Z"):
2017-07-27 07:42:12 +08:00
return parse("2006-01-02T15:04Z", datestr, loc)
default:
2017-07-27 07:42:12 +08:00
return parse("2006-01-02T15:04:05Z", datestr, loc)
2017-06-26 10:09:06 +08:00
}
2014-05-21 13:08:25 +08:00
case ST_DIGITDASHWS: // starts digit then dash 02- then whitespace 1 << 2 << 5 + 3
2014-05-12 09:22:16 +08:00
// 2013-04-01 22:43:22
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05", datestr, loc)
case ST_DIGITDASHWSWSOFFSET:
// 2006-01-02 15:04:05 -0700
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05 -0700", datestr, loc)
case ST_DIGITDASHWSWSOFFSETCOLON:
// 2006-01-02 15:04:05 -07:00
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05 -07:00", datestr, loc)
case ST_DIGITDASHWSWSOFFSETALPHA:
// 2015-02-18 00:12:00 +0000 UTC
2017-07-27 07:42:12 +08:00
t, err := parse("2006-01-02 15:04:05 -0700 UTC", datestr, loc)
if err == nil {
return t, nil
2014-05-07 12:15:43 +08:00
}
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05 +0000 GMT", datestr, loc)
case ST_DIGITDASHWSWSOFFSETCOLONALPHA:
// 2015-02-18 00:12:00 +00:00 UTC
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05 -07:00 UTC", datestr, loc)
case ST_DIGITDASHWSOFFSET:
// 2017-07-19 03:21:51+00:00
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05-07:00", datestr, loc)
case ST_DIGITDASHWSWSALPHA:
2014-12-03 06:57:00 +08:00
// 2014-12-16 06:20:00 UTC
2017-07-27 07:42:12 +08:00
t, err := parse("2006-01-02 15:04:05 UTC", datestr, loc)
if err == nil {
return t, nil
}
2017-07-27 07:42:12 +08:00
t, err = parse("2006-01-02 15:04:05 GMT", datestr, loc)
if err == nil {
return t, nil
}
if len(datestr) > len("2006-01-02 03:04:05") {
2017-07-27 07:42:12 +08:00
t, err = parse("2006-01-02 03:04:05", datestr[:len("2006-01-02 03:04:05")], loc)
if err == nil {
return t, nil
2015-04-17 02:37:50 +08:00
}
2017-04-12 06:30:42 +08:00
}
2017-04-12 06:30:42 +08:00
case ST_DIGITDASHWSDOT:
// 2012-08-03 18:31:59.257000000
// 2014-04-26 17:24:37.3186369
// 2017-01-27 00:07:31.945167
// 2016-03-14 00:00:00.000
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05", datestr, loc)
2017-04-12 06:30:42 +08:00
case ST_DIGITDASHWSDOTALPHA:
// 2012-08-03 18:31:59.257000000 UTC
// 2014-04-26 17:24:37.3186369 UTC
// 2017-01-27 00:07:31.945167 UTC
// 2016-03-14 00:00:00.000 UTC
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05 UTC", datestr, loc)
case ST_DIGITDASHWSDOTOFFSET:
2017-04-12 06:30:42 +08:00
// 2012-08-03 18:31:59.257000000 +0000
// 2014-04-26 17:24:37.3186369 +0000
// 2017-01-27 00:07:31.945167 +0000
// 2016-03-14 00:00:00.000 +0000
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05 -0700", datestr, loc)
case ST_DIGITDASHWSDOTOFFSETALPHA:
2017-04-12 06:30:42 +08:00
// 2012-08-03 18:31:59.257000000 +0000 UTC
// 2014-04-26 17:24:37.3186369 +0000 UTC
// 2017-01-27 00:07:31.945167 +0000 UTC
// 2016-03-14 00:00:00.000 +0000 UTC
2017-07-27 07:42:12 +08:00
return parse("2006-01-02 15:04:05 -0700 UTC", datestr, loc)
case ST_ALPHAWSALPHACOLON:
// Mon Jan _2 15:04:05 2006
2017-07-27 07:42:12 +08:00
return parse(time.ANSIC, datestr, loc)
case ST_ALPHAWSALPHACOLONOFFSET:
// Mon Jan 02 15:04:05 -0700 2006
2017-07-27 07:42:12 +08:00
return parse(time.RubyDate, datestr, loc)
case ST_ALPHAWSALPHACOLONALPHA:
// Mon Jan _2 15:04:05 MST 2006
2017-07-27 07:42:12 +08:00
return parse(time.UnixDate, datestr, loc)
case ST_ALPHAWSALPHACOLONALPHAOFFSET:
// Mon Aug 10 15:44:11 UTC+0100 2015
2017-07-27 07:42:12 +08:00
return parse("Mon Jan 02 15:04:05 MST-0700 2006", datestr, loc)
case ST_ALPHAWSALPHACOLONALPHAOFFSETALPHA:
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
if len(datestr) > len("Mon Jan 02 2006 15:04:05 MST-0700") {
// What effing time stamp is this?
// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
dateTmp := datestr[:33]
2017-07-27 07:42:12 +08:00
return parse("Mon Jan 02 2006 15:04:05 MST-0700", dateTmp, loc)
}
2014-05-21 13:08:25 +08:00
case ST_DIGITSLASH: // starts digit then slash 02/ (but nothing else)
2014-05-07 12:15:43 +08:00
// 3/1/2014
// 10/13/2014
// 01/02/2006
2014-07-11 06:25:23 +08:00
// 2014/10/13
if firstSlash == 4 {
if len(datestr) == len("2006/01/02") {
2017-07-27 07:42:12 +08:00
return parse("2006/01/02", datestr, loc)
2014-05-07 12:15:43 +08:00
} else {
2017-07-27 07:42:12 +08:00
return parse("2006/1/2", datestr, loc)
2014-05-07 12:15:43 +08:00
}
} else {
for _, parseFormat := range shortDates {
2017-07-27 07:42:12 +08:00
if t, err := parse(parseFormat, datestr, loc); err == nil {
2014-07-11 06:25:23 +08:00
return t, nil
}
2014-05-07 12:15:43 +08:00
}
}
2017-02-14 10:39:03 +08:00
case ST_DIGITSLASHWSCOLON: // starts digit then slash 02/ more digits/slashes then whitespace
2014-05-07 12:15:43 +08:00
// 4/8/2014 22:05
2014-07-11 06:25:23 +08:00
// 04/08/2014 22:05
// 2014/4/8 22:05
// 2014/04/08 22:05
2017-02-14 08:49:48 +08:00
2014-07-11 06:25:23 +08:00
if firstSlash == 4 {
2017-07-14 10:57:15 +08:00
for _, layout := range []string{"2006/01/02 15:04", "2006/1/2 15:04", "2006/01/2 15:04", "2006/1/02 15:04"} {
2017-07-27 07:42:12 +08:00
if t, err := parse(layout, datestr, loc); err == nil {
2017-07-14 10:57:15 +08:00
return t, nil
2014-05-12 04:33:13 +08:00
}
}
2014-05-07 12:15:43 +08:00
} else {
2017-07-14 10:57:15 +08:00
for _, layout := range []string{"01/02/2006 15:04", "01/2/2006 15:04", "1/02/2006 15:04", "1/2/2006 15:04"} {
2017-07-27 07:42:12 +08:00
if t, err := parse(layout, datestr, loc); err == nil {
2017-07-14 10:57:15 +08:00
return t, nil
2014-07-11 06:25:23 +08:00
}
2014-05-07 12:15:43 +08:00
}
}
2017-02-14 10:39:03 +08:00
case ST_DIGITSLASHWSCOLONAMPM: // starts digit then slash 02/ more digits/slashes then whitespace
// 4/8/2014 22:05 PM
// 04/08/2014 22:05 PM
2017-07-14 10:57:15 +08:00
// 04/08/2014 1:05 PM
2017-02-14 10:39:03 +08:00
// 2014/4/8 22:05 PM
// 2014/04/08 22:05 PM
if firstSlash == 4 {
2017-07-14 10:57:15 +08:00
for _, layout := range []string{"2006/01/02 03:04 PM", "2006/01/2 03:04 PM", "2006/1/02 03:04 PM", "2006/1/2 03:04 PM",
"2006/01/02 3:04 PM", "2006/01/2 3:04 PM", "2006/1/02 3:04 PM", "2006/1/2 3:04 PM"} {
2017-07-27 07:42:12 +08:00
if t, err := parse(layout, datestr, loc); err == nil {
2017-07-14 10:57:15 +08:00
return t, nil
2017-02-14 10:39:03 +08:00
}
}
} else {
2017-07-14 10:57:15 +08:00
for _, layout := range []string{"01/02/2006 03:04 PM", "01/2/2006 03:04 PM", "1/02/2006 03:04 PM", "1/2/2006 03:04 PM",
"01/02/2006 3:04 PM", "01/2/2006 3:04 PM", "1/02/2006 3:04 PM", "1/2/2006 3:04 PM"} {
2017-07-27 07:42:12 +08:00
if t, err := parse(layout, datestr, loc); err == nil {
2017-07-14 10:57:15 +08:00
return t, nil
2017-02-14 10:39:03 +08:00
}
2017-07-14 10:57:15 +08:00
2017-02-14 10:39:03 +08:00
}
}
2017-02-14 08:49:48 +08:00
2017-02-14 10:39:03 +08:00
case ST_DIGITSLASHWSCOLONCOLON: // starts digit then slash 02/ more digits/slashes then whitespace double colons
2014-07-11 06:25:23 +08:00
// 2014/07/10 06:55:38.156283
2014-05-07 12:15:43 +08:00
// 03/19/2012 10:11:59
// 3/1/2012 10:11:59
2014-05-12 04:33:13 +08:00
// 03/1/2012 10:11:59
// 3/01/2012 10:11:59
2014-07-11 06:25:23 +08:00
if firstSlash == 4 {
2017-07-14 10:57:15 +08:00
for _, layout := range []string{"2006/01/02 15:04:05", "2006/1/02 15:04:05", "2006/01/2 15:04:05", "2006/1/2 15:04:05"} {
2017-07-27 07:42:12 +08:00
if t, err := parse(layout, datestr, loc); err == nil {
2017-07-14 10:57:15 +08:00
return t, nil
2014-05-12 04:33:13 +08:00
}
}
2014-05-07 12:15:43 +08:00
} else {
2017-07-14 10:57:15 +08:00
for _, layout := range []string{"01/02/2006 15:04:05", "1/02/2006 15:04:05", "01/2/2006 15:04:05", "1/2/2006 15:04:05"} {
2017-07-27 07:42:12 +08:00
if t, err := parse(layout, datestr, loc); err == nil {
2017-07-14 10:57:15 +08:00
return t, nil
2014-07-11 06:25:23 +08:00
}
2014-05-07 12:15:43 +08:00
}
}
2017-02-14 10:39:03 +08:00
case ST_DIGITSLASHWSCOLONCOLONAMPM: // starts digit then slash 02/ more digits/slashes then whitespace double colons
// 2014/07/10 06:55:38.156283 PM
// 03/19/2012 10:11:59 PM
// 3/1/2012 10:11:59 PM
// 03/1/2012 10:11:59 PM
// 3/01/2012 10:11:59 PM
if firstSlash == 4 {
2017-07-14 10:57:15 +08:00
for _, layout := range []string{"2006/01/02 03:04:05 PM", "2006/1/02 03:04:05 PM", "2006/01/2 03:04:05 PM", "2006/1/2 03:04:05 PM",
"2006/01/02 3:04:05 PM", "2006/1/02 3:04:05 PM", "2006/01/2 3:04:05 PM", "2006/1/2 3:04:05 PM"} {
2017-07-27 07:42:12 +08:00
if t, err := parse(layout, datestr, loc); err == nil {
2017-07-14 10:57:15 +08:00
return t, nil
2017-02-14 10:39:03 +08:00
}
}
} else {
2017-07-14 10:57:15 +08:00
for _, layout := range []string{"01/02/2006 03:04:05 PM", "1/02/2006 03:04:05 PM", "01/2/2006 03:04:05 PM", "1/2/2006 03:04:05 PM"} {
2017-07-27 07:42:12 +08:00
if t, err := parse(layout, datestr, loc); err == nil {
2017-07-14 10:57:15 +08:00
return t, nil
2017-02-14 10:39:03 +08:00
}
}
}
2017-02-14 08:49:48 +08:00
2017-07-14 00:11:41 +08:00
case ST_WEEKDAYCOMMADELTA:
// Monday, 02 Jan 2006 15:04:05 -0700
// Monday, 02 Jan 2006 15:04:05 +0100
2017-07-27 07:42:12 +08:00
return parse("Monday, 02 Jan 2006 15:04:05 -0700", datestr, loc)
case ST_WEEKDAYABBREVCOMMA: // Starts alpha then comma
2017-07-14 00:11:41 +08:00
// Mon, 02-Jan-06 15:04:05 MST
// Mon, 02 Jan 2006 15:04:05 MST
2017-07-27 07:42:12 +08:00
return parse("Mon, 02 Jan 2006 15:04:05 MST", datestr, loc)
2017-07-14 00:11:41 +08:00
case ST_WEEKDAYABBREVCOMMADELTA:
// Mon, 02 Jan 2006 15:04:05 -0700
// Thu, 13 Jul 2017 08:58:40 +0100
// RFC1123Z = "Mon, 02 Jan 2006 15:04:05 -0700" // RFC1123 with numeric zone
2017-07-27 07:42:12 +08:00
return parse("Mon, 02 Jan 2006 15:04:05 -0700", datestr, loc)
2017-07-14 22:02:22 +08:00
case ST_WEEKDAYABBREVCOMMADELTAZONE:
// Tue, 11 Jul 2017 16:28:13 +0200 (CEST)
2017-07-27 07:42:12 +08:00
return parse("Mon, 02 Jan 2006 15:04:05 -0700 (CEST)", datestr, loc)
2014-04-21 10:56:17 +08:00
}
2014-06-16 02:18:20 +08:00
return time.Time{}, fmt.Errorf("Could not find date format for %s", datestr)
2014-04-21 10:56:17 +08:00
}