279 lines
7.2 KiB
Go
279 lines
7.2 KiB
Go
// Copyright 2017 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package date // import "miniflux.app/reader/date"
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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"time"
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)
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// DateFormats taken from github.com/mjibson/goread
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var dateFormats = []string{
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time.RFC822, // RSS
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time.RFC822Z, // RSS
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time.RFC3339, // Atom
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time.UnixDate,
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time.RubyDate,
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time.RFC850,
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time.RFC1123Z,
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time.RFC1123,
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time.ANSIC,
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"Mon, January 2 2006 15:04:05 -0700",
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"Mon, January 02, 2006, 15:04:05 MST",
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"Mon, January 02, 2006 15:04:05 MST",
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"Mon, Jan 2, 2006 15:04 MST",
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"Mon, Jan 2 2006 15:04 MST",
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"Mon, Jan 2 2006 15:04:05 MST",
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"Mon, Jan 2, 2006 15:04:05 MST",
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"Mon, Jan 2 2006 15:04:05 -700",
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"Mon, Jan 2 2006 15:04:05 -0700",
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"Mon Jan 2 15:04 2006",
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"Mon Jan 2 15:04:05 2006 MST",
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"Mon Jan 02, 2006 3:04 pm",
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"Mon, Jan 02,2006 15:04:05 MST",
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"Mon Jan 02 2006 15:04:05 -0700",
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"Monday, January 2, 2006 15:04:05 MST",
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"Monday, January 2, 2006 03:04 PM",
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"Monday, January 2, 2006",
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"Monday, January 02, 2006",
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"Monday, 2 January 2006 15:04:05 MST",
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"Monday, 2 January 2006 15:04:05 -0700",
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"Monday, 2 Jan 2006 15:04:05 MST",
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"Monday, 2 Jan 2006 15:04:05 -0700",
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"Monday, 02 January 2006 15:04:05 MST",
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"Monday, 02 January 2006 15:04:05 -0700",
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"Monday, 02 January 2006 15:04:05",
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"Monday, January 02, 2006 - 3:04pm",
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"Monday, January 2, 2006 - 3:04pm",
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"Mon, 01/02/2006 - 15:04",
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"Mon, 2 January 2006 15:04 MST",
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"Mon, 2 January 2006, 15:04 -0700",
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"Mon, 2 January 2006, 15:04:05 MST",
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"Mon, 2 January 2006 15:04:05 MST",
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"Mon, 2 January 2006 15:04:05 -0700",
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"Mon, 2 January 2006",
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"Mon, 2 Jan 2006 3:04:05 PM -0700",
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"Mon, 2 Jan 2006 15:4:5 MST",
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"Mon, 2 Jan 2006 15:4:5 -0700 GMT",
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"Mon, 2, Jan 2006 15:4",
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"Mon, 2 Jan 2006 15:04 MST",
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"Mon, 2 Jan 2006, 15:04 -0700",
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"Mon, 2 Jan 2006 15:04 -0700",
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"Mon, 2 Jan 2006 15:04:05 UT",
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"Mon, 2 Jan 2006 15:04:05MST",
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"Mon, 2 Jan 2006 15:04:05 MST",
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"Mon 2 Jan 2006 15:04:05 MST",
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"mon,2 Jan 2006 15:04:05 MST",
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"Mon, 2 Jan 2006 15:04:05 -0700 MST",
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"Mon, 2 Jan 2006 15:04:05-0700",
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"Mon, 2 Jan 2006 15:04:05 -0700",
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"Mon, 2 Jan 2006 15:04:05",
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"Mon, 2 Jan 2006 15:04",
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"Mon, 02 Jan 2006, 15:04",
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"Mon, 2 Jan 2006, 15:04",
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"Mon,2 Jan 2006",
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"Mon, 2 Jan 2006",
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"Mon, 2 Jan 15:04:05 MST",
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"Mon, 2 Jan 06 15:04:05 MST",
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"Mon, 2 Jan 06 15:04:05 -0700",
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"Mon, 2006-01-02 15:04",
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"Mon,02 January 2006 14:04:05 MST",
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"Mon, 02 January 2006",
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"Mon, 02 Jan 2006 3:04:05 PM MST",
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"Mon, 02 Jan 2006 15 -0700",
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"Mon,02 Jan 2006 15:04 MST",
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"Mon, 02 Jan 2006 15:04 MST",
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"Mon, 02 Jan 2006 15:04 -0700",
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"Mon, 02 Jan 2006 15:04:05 Z",
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"Mon, 02 Jan 2006 15:04:05 UT",
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"Mon, 02 Jan 2006 15:04:05 MST-07:00",
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"Mon, 02 Jan 2006 15:04:05 MST -0700",
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"Mon, 02 Jan 2006, 15:04:05 MST",
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"Mon, 02 Jan 2006 15:04:05MST",
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"Mon, 02 Jan 2006 15:04:05 MST",
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"Mon , 02 Jan 2006 15:04:05 MST",
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"Mon, 02 Jan 2006 15:04:05 GMT-0700",
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"Mon,02 Jan 2006 15:04:05 -0700",
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"Mon, 02 Jan 2006 15:04:05 -0700",
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"Mon, 02 Jan 2006 15:04:05 -07:00",
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"Mon, 02 Jan 2006 15:04:05 --0700",
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"Mon 02 Jan 2006 15:04:05 -0700",
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"Mon 02 Jan 2006, 15:04:05 MST",
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"Mon, 02 Jan 2006 15:04:05 MST",
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"Mon, 02 Jan 2006 15:04:05 -07",
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"Mon, 02 Jan 2006 15:04:05 00",
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"Mon, 02 Jan 2006 15:04:05",
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"Mon, 02 Jan 2006",
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"Mon, 02 Jan 06 15:04:05 MST",
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"Mon, 02 Jan 2006 3:04 PM MST",
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"January 02 2006 03:04:05 PM",
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"January 2, 2006 3:04 PM",
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"January 2, 2006, 3:04 p.m.",
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"January 2, 2006 15:04:05 MST",
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"January 2, 2006 15:04:05",
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"January 2, 2006 03:04 PM",
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"January 2, 2006",
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"January 02, 2006 15:04:05 MST",
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"January 02, 2006 15:04",
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"January 02, 2006 03:04 PM",
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"January 02, 2006",
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"Jan 2, 2006 3:04:05 PM MST",
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"Jan 2, 2006 3:04:05 PM",
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"Jan 2, 2006 15:04:05 MST",
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"Jan 2, 2006",
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"Jan 02 2006 03:04:05PM",
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"Jan 02, 2006",
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"6/1/2 15:04",
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"6-1-2 15:04",
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"2 January 2006 15:04:05 MST",
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"2 January 2006 15:04:05 -0700",
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"2 January 2006",
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"2 Jan 2006 15:04:05 Z",
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"2 Jan 2006 15:04:05 MST",
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"2 Jan 2006 15:04:05 -0700",
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"2 Jan 2006",
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"2 Jan 2006 15:04 MST",
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"2.1.2006 15:04:05",
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"2/1/2006",
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"2-1-2006",
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"2006 January 02",
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"2006-1-2T15:04:05Z",
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"2006-1-2 15:04:05",
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"2006-1-2",
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"2006-1-02T15:04:05Z",
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"2006-01-02T15:04Z",
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"2006-01-02T15:04-07:00",
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"2006-01-02T15:04:05Z",
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"2006-01-02T15:04:05-07:00:00",
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"2006-01-02T15:04:05:-0700",
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"2006-01-02T15:04:05-0700",
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"2006-01-02T15:04:05-07:00",
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"2006-01-02T15:04:05 -0700",
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"2006-01-02T15:04:05:00",
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"2006-01-02T15:04:05",
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"2006-01-02 at 15:04:05",
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"2006-01-02 15:04:05Z",
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"2006-01-02 15:04:05 MST",
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"2006-01-02 15:04:05-0700",
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"2006-01-02 15:04:05-07:00",
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"2006-01-02 15:04:05 -0700",
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"2006-01-02 15:04",
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"2006-01-02 00:00:00.0 15:04:05.0 -0700",
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"2006/01/02",
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"2006-01-02",
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"15:04 02.01.2006 -0700",
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"1/2/2006 3:04 PM MST",
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"1/2/2006 3:04:05 PM MST",
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"1/2/2006 3:04:05 PM",
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"1/2/2006 15:04:05 MST",
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"1/2/2006",
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"06/1/2 15:04",
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"06-1-2 15:04",
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"02 Monday, Jan 2006 15:04",
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"02 Jan 2006 15:04 MST",
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"02 Jan 2006 15:04:05 UT",
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"02 Jan 2006 15:04:05 MST",
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"02 Jan 2006 15:04:05 -0700",
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"02 Jan 2006 15:04:05",
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"02 Jan 2006",
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"02/01/2006 15:04 MST",
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"02-01-2006 15:04:05 MST",
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"02.01.2006 15:04:05",
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"02/01/2006 15:04:05",
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"02.01.2006 15:04",
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"02/01/2006 - 15:04",
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"02.01.2006 -0700",
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"02/01/2006",
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"02-01-2006",
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"01/02/2006 3:04 PM",
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"01/02/2006 15:04:05 MST",
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"01/02/2006 - 15:04",
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"01/02/2006",
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"01-02-2006",
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}
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// Parse parses a given date string using a large
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// list of commonly found feed date formats.
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func Parse(ds string) (t time.Time, err error) {
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timestamp, err := strconv.ParseInt(ds, 10, 64)
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if err == nil {
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return time.Unix(timestamp, 0), nil
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}
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ds = replaceNonEnglishWords(ds)
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d := strings.TrimSpace(ds)
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if d == "" {
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return t, errors.New("date parser: empty value")
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}
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for _, layout := range dateFormats {
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switch layout {
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case time.RFC822, time.RFC850, time.RFC1123:
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if t, err = parseLocalTimeDates(layout, d); err == nil {
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return
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}
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}
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if t, err = time.Parse(layout, d); err == nil {
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return
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}
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}
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lastSpace := strings.LastIndex(ds, " ")
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if lastSpace > 0 {
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return Parse(ds[0:lastSpace])
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}
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err = fmt.Errorf(`date parser: failed to parse date "%s"`, ds)
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return
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}
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// According to Golang documentation:
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//
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// RFC822, RFC850, and RFC1123 formats should be applied only to local times.
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// Applying them to UTC times will use "UTC" as the time zone abbreviation,
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// while strictly speaking those RFCs require the use of "GMT" in that case.
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func parseLocalTimeDates(layout, ds string) (t time.Time, err error) {
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loc := time.UTC
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// Workaround for dates that don't use GMT.
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if strings.HasSuffix(ds, "PST") {
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loc, _ = time.LoadLocation("America/Los_Angeles")
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}
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return time.ParseInLocation(layout, ds, loc)
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}
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// Replace German and French dates to English.
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func replaceNonEnglishWords(ds string) string {
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r := strings.NewReplacer(
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"Mo,", "Mon,",
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"Di,", "Tue,",
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"Mi,", "Wed,",
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"Do,", "Thu,",
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"Fr,", "Fri,",
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"Sa,", "Sat,",
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"So,", "Sun,",
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"Mär ", "Mar ",
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"Mai ", "May ",
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"Okt ", "Oct ",
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"Dez ", "Dec ",
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"lun,", "Mon,",
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"mar,", "Tue,",
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"mer,", "Wed,",
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"jeu,", "Thu,",
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"ven,", "Fri,",
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"sam,", "Sat,",
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"dim,", "Sun,",
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"avr ", "Apr ",
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"mai ", "May ",
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"jui ", "Jun ",
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)
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return r.Replace(ds)
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}
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