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(PowerShell) Get OAuth 2.0 Access Token using G_SvcOauthAccessToken2Obtains an OAUTH2 access token from the Google OAuth 2.0 Authorization Server using the G_SvcOauthAccessToken2 method. This is for Server to server applications using Google API's that need an access token. See https://developers.google.com/accounts/docs/OAuth2ServiceAccount
Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll" # This example assumes the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. $http = New-Object Chilkat.Http # When a service account (Client ID) is created at https://code.google.com/apis/console/ # Google will generate a P12 key. This is a PKCS12 (PFX) file that you will download # and save. The password to access the contents of this file is "notasecret". # NOTE: The Chilkat Pfx API provides the ability to load a PFX/P12 and re-save # with a different password. # Begin by loading the downloaded .p12 into a Chilkat certificate object: $cert = New-Object Chilkat.Cert $success = $cert.LoadPfxFile("/myDir/API Project-1c43a291e2a1-notasecret.p12","notasecret") if ($success -ne $true) { $($cert.LastErrorText) exit } # The next (and final) step is to request the access token. Chilkat internally # does all the work of forming the JWT header and JWT claim set, encoding and # signing the JWT, and sending the access token request. # The application need only provide the inputs: The iss, scope(s), sub, and the # desired duration with a max of 3600 seconds (1 hour). # # Each of these inputs is defined as follows # (see https://developers.google.com/accounts/docs/OAuth2ServiceAccount # iss: The email address of the service account. # scope: A space-delimited list of the permissions that the application requests. # sub: The email address of the user for which the application is requesting delegated access. # numSec: The number of seconds for which the access token will be valid (max 3600). $claimParams = New-Object Chilkat.Hashtable # The required claim parameters that must be provided by the application are # the "iss" and "scope" params: $success = $claimParams.AddStr("iss","761326798069-r5mljlln1rd4lrbhg75efgigp36m78j5@developer.gserviceaccount.com") $success = $claimParams.AddStr("scope","https://mail.google.com/") # The "sub" param is required if there is an email address, such as for a # Google Apps domain—if you use Google Apps for Work, where the administrator of the Google Apps domain # can authorize an application to access user data on behalf of users in the Google Apps domain. # # Comment out this line if there is no such email address. # The typical case is that there is no such email address. $success = $claimParams.AddStr("sub","user@your-domain.com") # The "aud" parameter is optional. If not set, it defaults to the value shown here: $success = $claimParams.AddStr("aud","https://accounts.google.com/o/oauth2/token") $numSec = 3600 $accessToken = $http.G_SvcOauthAccessToken2($claimParams,$numSec,$cert) if ($http.LastMethodSuccess -ne $true) { $($http.LastErrorText) } else { $("access token: " + $accessToken) } |
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