Unicode C
Unicode C
List Events on a Specified Google Calendar
See more Google Calendar Examples
Demonstrates how to fetch the list of events on a particular Google Calendar. The calendar can be referenced by the calendar ID, or by the keyword "primary".Chilkat Unicode C Downloads
#include <C_CkJsonObjectW.h>
#include <C_CkHttpW.h>
#include <C_CkStringBuilderW.h>
void ChilkatSample(void)
{
BOOL success;
HCkJsonObjectW jsonToken;
HCkHttpW http;
HCkStringBuilderW sbResponse;
HCkJsonObjectW json;
int numEvents;
int i;
success = FALSE;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// This example uses a previously obtained access token having permission for the
// Google Calendar scope.
// In this example, Get Google Calendar OAuth2 Access Token, the access
// token was saved to a JSON file. This example fetches the access token from the file..
jsonToken = CkJsonObjectW_Create();
success = CkJsonObjectW_LoadFile(jsonToken,L"qa_data/tokens/googleCalendar.json");
if (CkJsonObjectW_HasMember(jsonToken,L"access_token") == FALSE) {
wprintf(L"No access token found.\n");
CkJsonObjectW_Dispose(jsonToken);
return;
}
http = CkHttpW_Create();
CkHttpW_putAuthToken(http,CkJsonObjectW_stringOf(jsonToken,L"access_token"));
// Let's get the primary calendar. A calendar ID could have be used instead of "primary".
CkHttpW_SetUrlVar(http,L"calendarId",L"primary");
sbResponse = CkStringBuilderW_Create();
success = CkHttpW_QuickGetSb(http,L"https://www.googleapis.com/calendar/v3/calendars/{$calendarId}/events",sbResponse);
if (success != TRUE) {
wprintf(L"%s\n",CkHttpW_lastErrorText(http));
CkJsonObjectW_Dispose(jsonToken);
CkHttpW_Dispose(http);
CkStringBuilderW_Dispose(sbResponse);
return;
}
if (CkHttpW_getLastStatus(http) != 200) {
// Note: If a 401 unauthorized response is received, it likely means that the OAuth2 access token needs
// to be refreshed or re-fetched.
wprintf(L"Error response status: %d\n",CkHttpW_getLastStatus(http));
wprintf(L"%s\n",CkStringBuilderW_getAsString(sbResponse));
CkJsonObjectW_Dispose(jsonToken);
CkHttpW_Dispose(http);
CkStringBuilderW_Dispose(sbResponse);
return;
}
// A sample JSON response:
// (Code for parsing the Google Calendar events is shown below.)
// {
// "kind": "calendar#events",
// "etag": "\"p32cfpufit76da0g\"",
// "summary": "support@chilkatcloud.com",
// "updated": "2017-08-10T14:00:27.199Z",
// "timeZone": "America/Chicago",
// "accessRole": "owner",
// "defaultReminders": [
// {
// "method": "popup",
// "minutes": 10
// }
// ],
// "nextSyncToken": "CJj8-fLpzNUCEJj8-fLpzNUCGAU=",
// "items": [
// {
// "kind": "calendar#event",
// "etag": "\"3004746854620000\"",
// "id": "5jt9fopfg3rr9eftegiuq7gc5k",
// "status": "confirmed",
// "htmlLink": "https://www.google.com/calendar/event?eid=NWp0OWZvcGZnM3JyOWVmdGVnaXVxN2djNWsgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
// "created": "2017-08-10T13:57:07.000Z",
// "updated": "2017-08-10T13:57:07.310Z",
// "summary": "Run 10 miles",
// "creator": {
// "email": "support@chilkatcloud.com",
// "self": true
// },
// "organizer": {
// "email": "support@chilkatcloud.com",
// "self": true
// },
// "start": {
// "dateTime": "2017-08-10T12:00:00-05:00"
// },
// "end": {
// "dateTime": "2017-08-10T13:00:00-05:00"
// },
// "iCalUID": "5jt9fopfg3rr9eftegiuq7gc5k@google.com",
// "sequence": 0,
// "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.5jt9fopfg3rr9eftegiuq7gc5k",
// "reminders": {
// "useDefault": true
// }
// },
// {
// "kind": "calendar#event",
// "etag": "\"3004746898118000\"",
// "id": "7dvh49vd219r3sq7jdueieu8rc",
// "status": "confirmed",
// "htmlLink": "https://www.google.com/calendar/event?eid=N2R2aDQ5dmQyMTlyM3NxN2pkdWVpZXU4cmMgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
// "created": "2017-08-10T13:57:29.000Z",
// "updated": "2017-08-10T13:57:29.059Z",
// "summary": "Eat Giordano's Pizza",
// "creator": {
// "email": "support@chilkatcloud.com",
// "self": true
// },
// "organizer": {
// "email": "support@chilkatcloud.com",
// "self": true
// },
// "start": {
// "dateTime": "2017-08-10T15:00:00-05:00"
// },
// "end": {
// "dateTime": "2017-08-10T16:00:00-05:00"
// },
// "iCalUID": "7dvh49vd219r3sq7jdueieu8rc@google.com",
// "sequence": 0,
// "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.7dvh49vd219r3sq7jdueieu8rc",
// "reminders": {
// "useDefault": true
// }
// },
// {
// "kind": "calendar#event",
// "etag": "\"3004746915224000\"",
// "id": "5btd89ljn07bg3tlgpimcaqrro",
// "status": "confirmed",
// "htmlLink": "https://www.google.com/calendar/event?eid=NWJ0ZDg5bGpuMDdiZzN0bGdwaW1jYXFycm8gc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
// "created": "2017-08-10T13:57:37.000Z",
// "updated": "2017-08-10T13:57:37.612Z",
// "summary": "Nap",
// "creator": {
// "email": "support@chilkatcloud.com",
// "self": true
// },
// "organizer": {
// "email": "support@chilkatcloud.com",
// "self": true
// },
// "start": {
// "dateTime": "2017-08-10T16:30:00-05:00"
// },
// "end": {
// "dateTime": "2017-08-10T17:30:00-05:00"
// },
// "iCalUID": "5btd89ljn07bg3tlgpimcaqrro@google.com",
// "sequence": 0,
// "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.5btd89ljn07bg3tlgpimcaqrro",
// "reminders": {
// "useDefault": true
// }
// }
// ]
// }
//
json = CkJsonObjectW_Create();
CkJsonObjectW_LoadSb(json,sbResponse);
numEvents = CkJsonObjectW_SizeOfArray(json,L"items");
i = 0;
while (i < numEvents) {
CkJsonObjectW_putI(json,i);
wprintf(L"%s\n",CkJsonObjectW_stringOf(json,L"items[i].summary"));
wprintf(L"%s\n",CkJsonObjectW_stringOf(json,L"items[i].start.dateTime"));
wprintf(L"%s\n",CkJsonObjectW_stringOf(json,L"items[i].end.dateTime"));
wprintf(L"--\n");
i = i + 1;
}
// Sample output:
// Run 10 miles
// 2017-08-10T12:00:00-05:00
// 2017-08-10T13:00:00-05:00
// --
// Eat Giordano's Pizza
// 2017-08-10T15:00:00-05:00
// 2017-08-10T16:00:00-05:00
// --
// Nap
// 2017-08-10T16:30:00-05:00
// 2017-08-10T17:30:00-05:00
// --
//
CkJsonObjectW_Dispose(jsonToken);
CkHttpW_Dispose(http);
CkStringBuilderW_Dispose(sbResponse);
CkJsonObjectW_Dispose(json);
}