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(PowerShell) Quickbooks OAuth2 in a Desktop App

Demonstrates how to get a QuickBooks OAuth2 access token from a desktop application or script.

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Chilkat for Mono

[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet47.dll")

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

$oauth2 = New-Object Chilkat.OAuth2

# QuickBooks OAuth2 allows for an "http://localhost:<portNumber>/" callback URL for sandbox testing,
# but not for production.
# For a desktop app, you must provide a script on your web server to redirect to "http://localhost/<portNumber>"
# It can be written in C#, PHP, or whatever desired.  It must include the query string in the redirection.
# For example, in PHP your script would look like this:

# <?php
#   header( 'Location: http://localhost:3017?' . $_SERVER['QUERY_STRING'] );
# ?>

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

$oauth2.AuthorizationEndpoint = "https://appcenter.intuit.com/connect/oauth2"
$oauth2.TokenEndpoint = "https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer"

# Replace these with actual values.
$oauth2.ClientId = "QUICKBOOKS-CLIENT-ID"
$oauth2.ClientSecret = "QUICKBOOKS-CLIENT-SECRET"
$oauth2.UseBasicAuth = $true
$oauth2.CodeChallenge = $false

# Indicate the desired access.  Possible scopes that can appear in the list are:
# com.intuit.quickbooks.accounting:  QuickBooks Online API
# com.intuit.quickbooks.payment:  QuickBooks Payments API
# openid:  OpenID Connect processing
# profile:  user's given and family names
# email:  user's email address
# phone:  user's phone number
# address:  user's physical address
$oauth2.Scope = "com.intuit.quickbooks.accounting"

# Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
$url = $oauth2.StartAuth()
if ($oauth2.LastMethodSuccess -ne $true) {
    $($oauth2.LastErrorText)
    exit
}

$("url = " + $url)

# At this point, your application should load the URL in a browser.
# For example, 
# in C#: System.Diagnostics.Process.Start(url);
# in Java: Desktop.getDesktop().browse(new URI(url));
# in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
#              wsh.Run url
# The QuickBooks account owner would interactively accept or deny the authorization request.

# Add the code to load the url in a web browser here...
# Add the code to load the url in a web browser here...
# Add the code to load the url in a web browser here...

# Now wait for the authorization.
# We'll wait for a max of 60 seconds.
$numMsWaited = 0
while (($numMsWaited -lt 60000) -and ($oauth2.AuthFlowState -lt 3)) {
    $oauth2.SleepMs(100)
    $numMsWaited = $numMsWaited + 100
}

# If there was no response from the browser within 60 seconds, then 
# the AuthFlowState will be equal to 1 or 2.
# 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
# 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
# In that case, cancel the background task started in the call to StartAuth.
if ($oauth2.AuthFlowState -lt 3) {
    $oauth2.Cancel()
    $("No response from the browser!")
    exit
}

# Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
# The possible AuthFlowState values are:
# 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
# 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
# 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
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)
$sbJson.WriteFile("qa_data/tokens/qb-access-token.json","utf-8",$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)

 

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