PowerShell Requires Chilkat v10.1.2+

Schwab OAuth2 in a Desktop App

See more Schwab Examples

Demonstrates how to get a Charles Schwab OAuth2 access token from a desktop application or script. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  To further clarify, see OAuth 2.0 Authorization Flow

#  This is the way to initially obtain the OAuth2 access token.  Afterwards it can be 
#  repeatedly refreshed without user interaction, as shown in this example: Refresh Schwab OAuth2 Access Token.

$oauth2 = New-Object Chilkat.OAuth2

#  Your applicaton must use your own public web server as an intermediate
#  to receive and forward the redirect to localhost.
#  See Using Your Web Server as an Intermediary for OAuth2 Redirect to localhost

$oauth2.AppCallbackUrl = "https://yourwebserver.com/OAuth2.php"
$oauth2.ListenPort = 3017

$oauth2.AuthorizationEndpoint = "https://api.schwabapi.com/v1/oauth/authorize"
$oauth2.TokenEndpoint = "https://api.schwabapi.com/v1/oauth/token"

#  Replace these with actual values.
$oauth2.ClientId = "APP_KEY"
$oauth2.ClientSecret = "APP_SECRET"
$oauth2.UseBasicAuth = $true
$oauth2.CodeChallenge = $false

$oauth2.Scope = ""

#  Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
$url = $oauth2.StartAuth()
if ($oauth2.LastMethodSuccess -eq $false) {
    $($oauth2.LastErrorText)
    exit
}

$("url = " + $url)

#  Launch the default browser on the system and navigate to the url.
#  The LaunchBrowser method was added in Chilkat v10.1.2.
$success = $oauth2.LaunchBrowser($url)
if ($success -eq $false) {
    $($oauth2.LastErrorText)
    exit
}

#  Wait for the user to approve or deny authorization in the browser.
$numMsWaited = 0
while (($numMsWaited -lt 90000) -and ($oauth2.AuthFlowState -lt 3)) {
    $oauth2.SleepMs(100)
    $numMsWaited = $numMsWaited + 100
}

#  If the browser does not respond within the specified time, AuthFlowState will be:
#  
#  1: Waiting for Redirect – The OAuth2 background thread is waiting for the browser's redirect request.
#  2: Waiting for Final Response – The thread is awaiting the final access token response.
#  In either case, cancel the background task initiated by StartAuth.

if ($oauth2.AuthFlowState -lt 3) {
    $oauth2.Cancel()
    $("No response from the browser!")
    exit
}

#  Check AuthFlowState to determine if authorization was granted, denied, or failed:
#  
#  3: Success – OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
#  4: Access Denied – OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
#  5: Failure – OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

if ($oauth2.AuthFlowState -eq 5) {
    $("OAuth2 failed to complete.")
    $($oauth2.FailureInfo)
    exit
}

if ($oauth2.AuthFlowState -eq 4) {
    $("OAuth2 authorization was denied.")
    $($oauth2.AccessTokenResponse)
    exit
}

if ($oauth2.AuthFlowState -ne 3) {
    $("Unexpected AuthFlowState:" + $oauth2.AuthFlowState)
    exit
}

#  Save the full JSON access token response to a file.
$sbJson = New-Object Chilkat.StringBuilder
$sbJson.Append($oauth2.AccessTokenResponse)
$sbJson.WriteFile("qa_data/tokens/schwab-access-token.json","utf-8",$false)

#  The full JSON received looks like this:
#  {
#    "expires_in": 3600,
#    "x_refresh_token_expires_in": 8726400,
#    "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
#    "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
#    "token_type": "bearer"
#  }

$("OAuth2 authorization granted!")
$("Access Token = " + $oauth2.AccessToken)