Created
September 3, 2020 22:38
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Creating Google Meet via Golang
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/* | |
Google Meet communication | |
*/ | |
package main | |
import ( | |
// Google SDK Libraries | |
"golang.org/x/net/context" | |
"golang.org/x/oauth2" | |
"golang.org/x/oauth2/google" | |
"google.golang.org/api/calendar/v3" | |
// Standard Libraries | |
"encoding/json" | |
"fmt" | |
"io/ioutil" | |
"log" | |
"net/http" | |
"os" | |
"time" | |
) | |
// Retrieve a token, saves the token, then returns the generated client. | |
func getClient(config *oauth2.Config) *http.Client { | |
// The file token.json stores the user's access and refresh tokens, and is | |
// created automatically when the authorization flow completes for the first | |
// time. | |
tokFile := "token.json" | |
tok, err := tokenFromFile(tokFile) | |
if err != nil { | |
tok = getTokenFromWeb(config) | |
saveToken(tokFile, tok) | |
} | |
return config.Client(context.Background(), tok) | |
} | |
// Request a token from the web, then returns the retrieved token. | |
func getTokenFromWeb(config *oauth2.Config) *oauth2.Token { | |
authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline) | |
fmt.Printf("Go to the following link in your browser then type the "+ | |
"authorization code: \n%v\n", authURL) | |
var authCode string | |
if _, err := fmt.Scan(&authCode); err != nil { | |
log.Fatalf("Unable to read authorization code: %v", err) | |
} | |
tok, err := config.Exchange(context.TODO(), authCode) | |
if err != nil { | |
log.Fatalf("Unable to retrieve token from web: %v", err) | |
} | |
return tok | |
} | |
// Retrieves a token from a local file. | |
func tokenFromFile(file string) (*oauth2.Token, error) { | |
f, err := os.Open(file) | |
if err != nil { | |
return nil, err | |
} | |
defer f.Close() | |
tok := &oauth2.Token{} | |
err = json.NewDecoder(f).Decode(tok) | |
return tok, err | |
} | |
// Saves a token to a file path. | |
func saveToken(path string, token *oauth2.Token) { | |
fmt.Printf("Saving credential file to: %s\n", path) | |
f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600) | |
if err != nil { | |
log.Fatalf("Unable to cache oauth token: %v", err) | |
} | |
defer f.Close() | |
json.NewEncoder(f).Encode(token) | |
} | |
func main() string { | |
b, err := ioutil.ReadFile("credentials.json") | |
if err != nil { | |
log.Fatalf("Unable to read client secret file: %v", err) | |
} | |
// If modifying these scopes, delete your previously saved token.json. | |
config, err := google.ConfigFromJSON(b, calendar.CalendarEventsScope) | |
if err != nil { | |
log.Fatalf("Unable to parse client secret file to config: %v", err) | |
} | |
client := getClient(config) | |
srv, err := calendar.New(client) | |
if err != nil { | |
log.Fatalf("Unable to retrieve Calendar client: %v", err) | |
} | |
t0 := time.Now().Format(time.RFC3339) | |
t1 := time.Now().Add(1 * time.Hour).Format(time.RFC3339) | |
event := &calendar.Event{ | |
Summary: "Sample event", | |
Description: "This is a sample event.", | |
Start: &calendar.EventDateTime{ | |
DateTime: t0, | |
}, | |
End: &calendar.EventDateTime{ | |
DateTime: t1, | |
}, | |
ConferenceData: &calendar.ConferenceData{ | |
CreateRequest: &calendar.CreateConferenceRequest{ | |
RequestId: "<RANDOM_VALUE>", | |
ConferenceSolutionKey: &calendar.ConferenceSolutionKey{ | |
Type: "hangoutsMeet", | |
}, | |
Status: &calendar.ConferenceRequestStatus{ | |
StatusCode: "success", | |
}, | |
}, | |
}, | |
} | |
// Email/User owner | |
calendarID := "youremail@domain.com" | |
event, err = srv.Events.Insert(calendarID, event).ConferenceDataVersion(1).Do() | |
if err != nil { | |
log.Fatalf("Unable to create event. %v\n", err) | |
} | |
fmt.Println(event.HangoutLink) | |
} |
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