(Ruby) 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 Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# 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 = Chilkat::CkJsonObject.new()
success = jsonToken.LoadFile("qa_data/tokens/googleCalendar.json")
if (jsonToken.HasMember("access_token") == false)
    print "No access token found." + "\n";
    exit
end

http = Chilkat::CkHttp.new()
http.put_AuthToken(jsonToken.stringOf("access_token"))

# Let's get the primary calendar.  A calendar ID could have be used instead of "primary".
http.SetUrlVar("calendarId","primary")
sbResponse = Chilkat::CkStringBuilder.new()
success = http.QuickGetSb("https://www.googleapis.com/calendar/v3/calendars/{$calendarId}/events",sbResponse)
if (success != true)
    print http.lastErrorText() + "\n";
    exit
end

if (http.get_LastStatus() != 200)
    # Note: If a 401 unauthorized response is received, it likely means that the OAuth2 access token needs
    # to be refreshed or re-fetched.
    print "Error response status: " + http.get_LastStatus().to_s() + "\n";
    print sbResponse.getAsString() + "\n";
    exit
end

# 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 = Chilkat::CkJsonObject.new()
json.LoadSb(sbResponse)

numEvents = json.SizeOfArray("items")
i = 0
while i < numEvents
    json.put_I(i)
    print json.stringOf("items[i].summary") + "\n";
    print json.stringOf("items[i].start.dateTime") + "\n";
    print json.stringOf("items[i].end.dateTime") + "\n";
    print "--" + "\n";
    i = i + 1
end

# 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
# --
#