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(Perl) Get Google Cloud Storage Access Token using Service Account JSON Private KeyDemonstrates how to get a Google Cloud Storage access token using a JSON service account private key. Obtaining an access token for a service account requires no user interaction (it does not require a browser, nor callback URI's, etc.). When an access token expires, an application can be (and should be) designed to automatically fetch a new access token.
use chilkat(); # This example requires the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. # First load the JSON key into a string. $fac = chilkat::CkFileAccess->new(); $jsonKey = $fac->readEntireTextFile("qa_data/googleApi/ChilkatCloud-13a07a2e8b3f.json","utf-8"); if ($fac->get_LastMethodSuccess() != 1) { print $fac->lastErrorText() . "\r\n"; exit; } # A JSON private key should look something like this: # { # "type": "service_account", # "project_id": "chilkattest-1350", # "private_key_id": "fa2e36ee26986eab628b59868af8bec1d1c64c38", # "private_key": "-----BEGIN PRIVATE KEY-----\nMIIEvgIjFa...28N64N2n1E4FYzBZjSdy\n-----END PRIVATE KEY-----\n", # "client_email": "598922945226-00rb0ppfg0sndajo6bhvd4v17jtj2d3a@developer.gserviceaccount.com", # "client_id": "598922945226-00rb0ppfg0snd9jo7bhvd4v17jtj2d3a.apps.googleusercontent.com", # "auth_uri": "https://accounts.google.com/o/oauth2/auth", # "token_uri": "https://accounts.google.com/o/oauth2/token", # "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs", # "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/598922945226-00rb0ppfg0sndajo6bhvd4v17jtj2d3a%40developer.gserviceaccount.com" # } $gAuth = chilkat::CkAuthGoogle->new(); $gAuth->put_JsonKey($jsonKey); # Choose a scope. $gAuth->put_Scope("https://www.googleapis.com/auth/cloud-platform"); # Request an access token that is valid for this many seconds. $gAuth->put_ExpireNumSeconds(3600); # If the application is requesting delegated access: # The email address of the user for which the application is requesting delegated access, # then set the email address here. (Otherwise leave it empty.) $gAuth->put_SubEmailAddress(""); # Connect to www.googleapis.com using TLS (TLS 1.2 is the default.) # The Chilkat socket object is used so that the connection can be established # through proxies or an SSH tunnel if desired. $tlsSock = chilkat::CkSocket->new(); $success = $tlsSock->Connect("www.googleapis.com",443,1,5000); if ($success != 1) { print $tlsSock->lastErrorText() . "\r\n"; exit; } # Send the request to obtain the access token. $success = $gAuth->ObtainAccessToken($tlsSock); if ($success != 1) { print $gAuth->lastErrorText() . "\r\n"; exit; } # Examine the access token: print "Access Token: " . $gAuth->accessToken() . "\r\n"; # We're going to save this access token to a file to be used # by other examples. $sbToken = chilkat::CkStringBuilder->new(); $sbToken->Append($gAuth->accessToken()); $sbToken->WriteFile("qa_data/tokens/googleCloudStorageAccessToken.txt","utf-8",0); |
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