(Perl) Yahoo Mail Refresh OAuth2 Access Token

See more Yahoo Mail Examples

For more information, see https://developer.yahoo.com/oauth2/guide/

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# It is assumed we previously obtained an OAuth2 access token.
# This example loads the JSON access token file 
# saved by this example: Get Yahoo Mail OAuth2 Access Token

$jsonToken = chilkat::CkJsonObject->new();
$success = $jsonToken->LoadFile("qa_data/tokens/yahooMail.json");
if ($success != 1) {
    print "Failed to load googleSheets.json" . "\r\n";
    exit;
}

# The access token JSON looks like this:

# {
#   "access_token": "kCVQdnOdul...LHucA--",
#   "refresh_token": "AIenVWETSo0jklFBVkPS8vVm8E.Dj9ToRG.xDbDYmZ55WIs5t6CZhDkD",
#   "expires_in": 3600,
#   "token_type": "bearer",
#   "xoauth_yahoo_guid": "HGDQCVF6JB4YDOWHITPJFBHCWA"
# }

$oauth2 = chilkat::CkOAuth2->new();

# See Step 5 at https://developer.yahoo.com/oauth2/guide/flows_authcode/
$oauth2->put_TokenEndpoint("https://api.login.yahoo.com/oauth2/get_token");

# Replace these with actual values.
$oauth2->put_ClientId("CLIENT_ID");
$oauth2->put_ClientSecret("CLIENT_SECRET");

# Get the "refresh_token"
$oauth2->put_RefreshToken($jsonToken->stringOf("refresh_token"));

# Send the HTTP POST to refresh the access token..
$success = $oauth2->RefreshAccessToken();
if ($success != 1) {
    print $oauth2->lastErrorText() . "\r\n";
    exit;
}

# The response contains a new access token, but we must keep
# our existing refresh token for when we need to refresh again in the future.
$jsonToken->UpdateString("access_token",$oauth2->accessToken());

# Save the new JSON access token response to a file.
$sbJson = chilkat::CkStringBuilder->new();
$jsonToken->put_EmitCompact(0);
$jsonToken->EmitSb($sbJson);
$sbJson->WriteFile("qa_data/tokens/yahooMail.json","utf-8",0);

print "OAuth2 authorization granted!" . "\r\n";
print "New Access Token = " . $oauth2->accessToken() . "\r\n";