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DataFlex

JSON Date Parsing

See more JSON Examples

Demonstrates how to parse date/time strings from JSON.

Note: This example uses the DtOf and DateOf methods introduced in Chilkat v9.5.0.73

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Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoJson
    Variant vDateTime
    Handle hoDateTime
    Variant vDt
    Handle hoDt
    Boolean iGetAsLocal
    String sTemp1
    Integer iTemp1
    Integer iTemp2
    Integer iTemp3
    Integer iTemp4
    Integer iTemp5

    Move False To iSuccess

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Set ComEmitCompact Of hoJson To False

    // First, let's create JSON containing some date/time strings.
    Get ComUpdateString Of hoJson "test.timestamp" "2018-01-30T20:35:00Z" To iSuccess
    Get ComUpdateString Of hoJson "test.rfc822" "Tue, 24 Apr 2018 08:47:03 -0500" To iSuccess
    Get ComUpdateString Of hoJson "test.dateStrings[0]" "2018-01-30T20:35:00Z" To iSuccess
    Get ComUpdateString Of hoJson "test.dateStrings[1]" "Tue, 24 Apr 2018 08:47:03 -0500" To iSuccess
    Get ComUpdateNumber Of hoJson "test.StartLoggingTime" "1446834998.695" To iSuccess
    Get ComUpdateNumber Of hoJson "test.Expiration" "1442877512.0" To iSuccess
    Get ComUpdateInt Of hoJson "test.StartTime" 1518867432 To iSuccess

    Get ComEmit Of hoJson To sTemp1
    Showln sTemp1

    // We've built the following JSON:

    // {
    //   "test": {
    //     "timestamp": "2018-01-30T20:35:00Z",
    //     "rfc822": "Tue, 24 Apr 2018 08:47:03 -0500",
    //     "dateStrings": [
    //       "2018-01-30T20:35:00Z",
    //       "Tue, 24 Apr 2018 08:47:03 -0500"
    //     ],
    //     "StartLoggingTime": 1446834998.695,
    //     "Expiration": 1442877512.0,
    //     "StartTime": 1518867432
    //   }
    // }

    // Use the DateOf and DtOf methods to load Chilkat date/time objects with the date/time values.
    // The CkDateTime object is primarily for loading a date/time from numerous formats, and then getting
    // the date/time in various formats.  Thus, it's primarly for date/time format conversion.
    // The DtObj object holds a date/time where the individual components (day, month, year, hour, minutes, etc.) are 
    // immediately accessible as integers.
    Get Create (RefClass(cComCkDateTime)) To hoDateTime
    If (Not(IsComObjectCreated(hoDateTime))) Begin
        Send CreateComObject of hoDateTime
    End
    Get Create (RefClass(cComChilkatDtObj)) To hoDt
    If (Not(IsComObjectCreated(hoDt))) Begin
        Send CreateComObject of hoDt
    End
    Move False To iGetAsLocal

    // Load the date/time at test.timestamp into the dateTime object.
    Get pvComObject of hoDateTime to vDateTime
    Get ComDateOf Of hoJson "test.timestamp" vDateTime To iSuccess
    Get ComGetAsTimestamp Of hoDateTime iGetAsLocal To sTemp1
    Showln sTemp1
    Get ComGetAsUnixTime Of hoDateTime False To iTemp1
    Showln iTemp1
    Get ComGetAsRfc822 Of hoDateTime iGetAsLocal To sTemp1
    Showln sTemp1

    Get pvComObject of hoDateTime to vDateTime
    Get ComDateOf Of hoJson "test.rfc822" vDateTime To iSuccess
    Get ComGetAsTimestamp Of hoDateTime iGetAsLocal To sTemp1
    Showln sTemp1

    Set ComI Of hoJson To 0
    Get pvComObject of hoDateTime to vDateTime
    Get ComDateOf Of hoJson "test.dateStrings[i]" vDateTime To iSuccess
    Get ComGetAsTimestamp Of hoDateTime iGetAsLocal To sTemp1
    Showln sTemp1

    Set ComI Of hoJson To 1
    Get pvComObject of hoDateTime to vDateTime
    Get ComDateOf Of hoJson "test.dateStrings[i]" vDateTime To iSuccess
    Get ComGetAsTimestamp Of hoDateTime iGetAsLocal To sTemp1
    Showln sTemp1

    Get pvComObject of hoDateTime to vDateTime
    Get ComDateOf Of hoJson "test.StartLoggingTime" vDateTime To iSuccess
    Get ComGetAsTimestamp Of hoDateTime iGetAsLocal To sTemp1
    Showln sTemp1

    Get pvComObject of hoDateTime to vDateTime
    Get ComDateOf Of hoJson "test.Expiration" vDateTime To iSuccess
    Get ComGetAsTimestamp Of hoDateTime iGetAsLocal To sTemp1
    Showln sTemp1

    Get pvComObject of hoDateTime to vDateTime
    Get ComDateOf Of hoJson "test.StartTime" vDateTime To iSuccess
    Get ComGetAsTimestamp Of hoDateTime iGetAsLocal To sTemp1
    Showln sTemp1

    // Output so far:

    // 	2018-01-30T20:35:00Z
    // 	1517344500
    // 	Tue, 30 Jan 2018 20:35:00 GMT
    // 	2018-04-24T13:47:03Z
    // 	2018-01-30T20:35:00Z
    // 	2018-04-24T13:47:03Z
    // 	2015-11-07T00:36:38Z
    // 	2015-09-22T04:18:32Z
    // 	2018-02-17T17:37:12Z

    // Now load the date/time strings into the dt object:
    Get pvComObject of hoDt to vDt
    Get ComDtOf Of hoJson "test.timestamp" iGetAsLocal vDt To iSuccess
    Get ComMonth Of hoDt To iTemp1
    Get ComDay Of hoDt To iTemp2
    Get ComYear Of hoDt To iTemp3
    Get ComHour Of hoDt To iTemp4
    Get ComMinute Of hoDt To iTemp5
    Showln "month=" iTemp1 ", day=" iTemp2 ", year=" iTemp3 ", hour=" iTemp4 ", minute=" iTemp5

    Get pvComObject of hoDt to vDt
    Get ComDtOf Of hoJson "test.rfc822" iGetAsLocal vDt To iSuccess
    Get ComMonth Of hoDt To iTemp1
    Get ComDay Of hoDt To iTemp2
    Get ComYear Of hoDt To iTemp3
    Get ComHour Of hoDt To iTemp4
    Get ComMinute Of hoDt To iTemp5
    Showln "month=" iTemp1 ", day=" iTemp2 ", year=" iTemp3 ", hour=" iTemp4 ", minute=" iTemp5

    Set ComI Of hoJson To 0
    Get pvComObject of hoDt to vDt
    Get ComDtOf Of hoJson "test.dateStrings[i]" iGetAsLocal vDt To iSuccess
    Get ComMonth Of hoDt To iTemp1
    Get ComDay Of hoDt To iTemp2
    Get ComYear Of hoDt To iTemp3
    Get ComHour Of hoDt To iTemp4
    Get ComMinute Of hoDt To iTemp5
    Showln "month=" iTemp1 ", day=" iTemp2 ", year=" iTemp3 ", hour=" iTemp4 ", minute=" iTemp5

    Set ComI Of hoJson To 1
    Get pvComObject of hoDt to vDt
    Get ComDtOf Of hoJson "test.dateStrings[i]" iGetAsLocal vDt To iSuccess
    Get ComMonth Of hoDt To iTemp1
    Get ComDay Of hoDt To iTemp2
    Get ComYear Of hoDt To iTemp3
    Get ComHour Of hoDt To iTemp4
    Get ComMinute Of hoDt To iTemp5
    Showln "month=" iTemp1 ", day=" iTemp2 ", year=" iTemp3 ", hour=" iTemp4 ", minute=" iTemp5

    Get pvComObject of hoDt to vDt
    Get ComDtOf Of hoJson "test.StartLoggingTime" iGetAsLocal vDt To iSuccess
    Get ComMonth Of hoDt To iTemp1
    Get ComDay Of hoDt To iTemp2
    Get ComYear Of hoDt To iTemp3
    Get ComHour Of hoDt To iTemp4
    Get ComMinute Of hoDt To iTemp5
    Showln "month=" iTemp1 ", day=" iTemp2 ", year=" iTemp3 ", hour=" iTemp4 ", minute=" iTemp5

    Get pvComObject of hoDt to vDt
    Get ComDtOf Of hoJson "test.Expiration" iGetAsLocal vDt To iSuccess
    Get ComMonth Of hoDt To iTemp1
    Get ComDay Of hoDt To iTemp2
    Get ComYear Of hoDt To iTemp3
    Get ComHour Of hoDt To iTemp4
    Get ComMinute Of hoDt To iTemp5
    Showln "month=" iTemp1 ", day=" iTemp2 ", year=" iTemp3 ", hour=" iTemp4 ", minute=" iTemp5

    Get pvComObject of hoDt to vDt
    Get ComDtOf Of hoJson "test.StartTime" iGetAsLocal vDt To iSuccess
    Get ComMonth Of hoDt To iTemp1
    Get ComDay Of hoDt To iTemp2
    Get ComYear Of hoDt To iTemp3
    Get ComHour Of hoDt To iTemp4
    Get ComMinute Of hoDt To iTemp5
    Showln "month=" iTemp1 ", day=" iTemp2 ", year=" iTemp3 ", hour=" iTemp4 ", minute=" iTemp5

    // Output:

    // month=1, day=30, year=2018, hour=20, minute=35
    // month=4, day=24, year=2018, hour=13, minute=47
    // month=1, day=30, year=2018, hour=20, minute=35
    // month=4, day=24, year=2018, hour=13, minute=47
    // month=11, day=6, year=2015, hour=18, minute=36
    // month=9, day=21, year=2015, hour=23, minute=18
    // month=2, day=17, year=2018, hour=11, minute=37


End_Procedure