C

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

C

#include <C_CkJsonObject.h>
#include <C_CkDateTime.h>
#include <C_CkDtObj.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObject json;
    HCkDateTime dateTime;
    HCkDtObj dt;
    BOOL getAsLocal;

    success = FALSE;

    json = CkJsonObject_Create();
    CkJsonObject_putEmitCompact(json,FALSE);

    // First, let's create JSON containing some date/time strings.
    CkJsonObject_UpdateString(json,"test.timestamp","2018-01-30T20:35:00Z");
    CkJsonObject_UpdateString(json,"test.rfc822","Tue, 24 Apr 2018 08:47:03 -0500");
    CkJsonObject_UpdateString(json,"test.dateStrings[0]","2018-01-30T20:35:00Z");
    CkJsonObject_UpdateString(json,"test.dateStrings[1]","Tue, 24 Apr 2018 08:47:03 -0500");
    CkJsonObject_UpdateNumber(json,"test.StartLoggingTime","1446834998.695");
    CkJsonObject_UpdateNumber(json,"test.Expiration","1442877512.0");
    CkJsonObject_UpdateInt(json,"test.StartTime",1518867432);

    printf("%s\n",CkJsonObject_emit(json));

    // 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.
    dateTime = CkDateTime_Create();
    dt = CkDtObj_Create();
    getAsLocal = FALSE;

    // Load the date/time at test.timestamp into the dateTime object.
    success = CkJsonObject_DateOf(json,"test.timestamp",dateTime);
    printf("%s\n",CkDateTime_getAsTimestamp(dateTime,getAsLocal));
    printf("%u\n",CkDateTime_GetAsUnixTime(dateTime,FALSE));
    printf("%s\n",CkDateTime_getAsRfc822(dateTime,getAsLocal));

    success = CkJsonObject_DateOf(json,"test.rfc822",dateTime);
    printf("%s\n",CkDateTime_getAsTimestamp(dateTime,getAsLocal));

    CkJsonObject_putI(json,0);
    success = CkJsonObject_DateOf(json,"test.dateStrings[i]",dateTime);
    printf("%s\n",CkDateTime_getAsTimestamp(dateTime,getAsLocal));

    CkJsonObject_putI(json,1);
    success = CkJsonObject_DateOf(json,"test.dateStrings[i]",dateTime);
    printf("%s\n",CkDateTime_getAsTimestamp(dateTime,getAsLocal));

    success = CkJsonObject_DateOf(json,"test.StartLoggingTime",dateTime);
    printf("%s\n",CkDateTime_getAsTimestamp(dateTime,getAsLocal));

    success = CkJsonObject_DateOf(json,"test.Expiration",dateTime);
    printf("%s\n",CkDateTime_getAsTimestamp(dateTime,getAsLocal));

    success = CkJsonObject_DateOf(json,"test.StartTime",dateTime);
    printf("%s\n",CkDateTime_getAsTimestamp(dateTime,getAsLocal));

    // 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:
    success = CkJsonObject_DtOf(json,"test.timestamp",getAsLocal,dt);
    printf("month=%d, day=%d, year=%d, hour=%d, minute=%d\n",CkDtObj_getMonth(dt),CkDtObj_getDay(dt),CkDtObj_getYear(dt),CkDtObj_getHour(dt)
        ,CkDtObj_getMinute(dt));

    success = CkJsonObject_DtOf(json,"test.rfc822",getAsLocal,dt);
    printf("month=%d, day=%d, year=%d, hour=%d, minute=%d\n",CkDtObj_getMonth(dt),CkDtObj_getDay(dt),CkDtObj_getYear(dt),CkDtObj_getHour(dt)
        ,CkDtObj_getMinute(dt));

    CkJsonObject_putI(json,0);
    success = CkJsonObject_DtOf(json,"test.dateStrings[i]",getAsLocal,dt);
    printf("month=%d, day=%d, year=%d, hour=%d, minute=%d\n",CkDtObj_getMonth(dt),CkDtObj_getDay(dt),CkDtObj_getYear(dt),CkDtObj_getHour(dt)
        ,CkDtObj_getMinute(dt));

    CkJsonObject_putI(json,1);
    success = CkJsonObject_DtOf(json,"test.dateStrings[i]",getAsLocal,dt);
    printf("month=%d, day=%d, year=%d, hour=%d, minute=%d\n",CkDtObj_getMonth(dt),CkDtObj_getDay(dt),CkDtObj_getYear(dt),CkDtObj_getHour(dt)
        ,CkDtObj_getMinute(dt));

    success = CkJsonObject_DtOf(json,"test.StartLoggingTime",getAsLocal,dt);
    printf("month=%d, day=%d, year=%d, hour=%d, minute=%d\n",CkDtObj_getMonth(dt),CkDtObj_getDay(dt),CkDtObj_getYear(dt),CkDtObj_getHour(dt)
        ,CkDtObj_getMinute(dt));

    success = CkJsonObject_DtOf(json,"test.Expiration",getAsLocal,dt);
    printf("month=%d, day=%d, year=%d, hour=%d, minute=%d\n",CkDtObj_getMonth(dt),CkDtObj_getDay(dt),CkDtObj_getYear(dt),CkDtObj_getHour(dt)
        ,CkDtObj_getMinute(dt));

    success = CkJsonObject_DtOf(json,"test.StartTime",getAsLocal,dt);
    printf("month=%d, day=%d, year=%d, hour=%d, minute=%d\n",CkDtObj_getMonth(dt),CkDtObj_getDay(dt),CkDtObj_getYear(dt),CkDtObj_getHour(dt)
        ,CkDtObj_getMinute(dt));

    // 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


    CkJsonObject_Dispose(json);
    CkDateTime_Dispose(dateTime);
    CkDtObj_Dispose(dt);

    }