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(Go) Google Drive Refresh Access TokenDemonstrates how to automatically refresh the access token when it expires.
success := true // It 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 Drive scope. // The access token (and refresh token) was previously saved to a JSON file with this format: // See Get Google Drive OAuth2 Access Token // { // "access_token": "ya29.Gls-BsdxTWuenChv ... yzVIrXikkLxu5T6dy4I6GjADFardoz4Lruw", // "expires_in": 3600, // "refresh_token": "1/tMBJ ... 27D-Hk6rpQYBA", // "scope": "https://www.googleapis.com/auth/drive", // "token_type": "Bearer" // } json := chilkat.NewJsonObject() tokenFilePath := "qa_data/tokens/googleDrive.json" json.LoadFile(tokenFilePath) oauth2 := chilkat.NewOAuth2() oauth2.SetAccessToken(*json.StringOf("access_token")) oauth2.SetRefreshToken(*json.StringOf("refresh_token")) rest := chilkat.NewRest() // Connect using TLS. bAutoReconnect := true success = rest.Connect("www.googleapis.com",443,true,bAutoReconnect) // Provide the authentication credentials (i.e. the access token) rest.SetAuthOAuth2(oauth2) // We'll test with a simple request to empty trash. // If our access token expired, we'll get a 401 response.. jsonResponse := rest.FullRequestNoBody("DELETE","/drive/v3/files/trash") if rest.LastMethodSuccess() != true { fmt.Println(rest.LastErrorText()) json.DisposeJsonObject() oauth2.DisposeOAuth2() rest.DisposeRest() return } // If the access token expired, we'll get a 401 response status with this response body: // { // "error": { // "errors": [ // { // "domain": "global", // "reason": "authError", // "message": "Invalid Credentials", // "locationType": "header", // "location": "Authorization" // } // ], // "code": 401, // "message": "Invalid Credentials" // } // } if rest.ResponseStatusCode() == 401 { fmt.Println("Refreshing access token...") oauth2.SetAuthorizationEndpoint("https://accounts.google.com/o/oauth2/v2/auth") oauth2.SetTokenEndpoint("https://www.googleapis.com/oauth2/v4/token") // Replace these with actual values. oauth2.SetClientId("GOOGLE-CLIENT-ID") oauth2.SetClientSecret("GOOGLE-CLIENT-SECRET") oauth2.SetScope("https://www.googleapis.com/auth/drive") // Use OAuth2 to refresh the access token. success = oauth2.RefreshAccessToken() if success != true { fmt.Println(oauth2.LastErrorText()) json.DisposeJsonObject() oauth2.DisposeOAuth2() rest.DisposeRest() return } // Save the new access token to our XML file (so we can refresh it again when needed). json.UpdateString("access_token",oauth2.AccessToken()) fac := chilkat.NewFileAccess() fac.WriteEntireTextFile(tokenFilePath,*json.Emit(),"utf-8",false) fmt.Println("Access Token Refreshed!") // Retry the request with the new access token.. jsonResponse = *rest.FullRequestNoBody("DELETE","/drive/v3/files/trash") if rest.LastMethodSuccess() != true { fmt.Println(rest.LastErrorText()) json.DisposeJsonObject() oauth2.DisposeOAuth2() rest.DisposeRest() fac.DisposeFileAccess() return } } // A successful response will have a status code equal to 204 and the response body is empty. // (If not successful, then there should be a JSON response body with information..) if rest.ResponseStatusCode() != 204 { fmt.Println("response status code = ", rest.ResponseStatusCode()) fmt.Println("response status text = ", rest.ResponseStatusText()) fmt.Println("response header: ", rest.ResponseHeader()) fmt.Println("response JSON: ", *jsonResponse) json.DisposeJsonObject() oauth2.DisposeOAuth2() rest.DisposeRest() fac.DisposeFileAccess() return } fmt.Println("Trash Emptied!") json.DisposeJsonObject() oauth2.DisposeOAuth2() rest.DisposeRest() fac.DisposeFileAccess() |
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