(PowerBuilder) Slack OAuth2

See more OAuth2 Examples

Note: This example requires Chilkat v10.1.2 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Oauth2
string ls_Url
integer li_Success
integer li_NumMsWaited
oleobject loo_Json
oleobject loo_Fac

// For more information about the OAuth2, see OAuth 2.0 Authorization Flow

loo_Oauth2 = create oleobject
// Use "Chilkat_9_5_0.OAuth2" for versions of Chilkat < 10.0.0
li_rc = loo_Oauth2.ConnectToNewObject("Chilkat.OAuth2")
if li_rc < 0 then
    destroy loo_Oauth2
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// This example is for desktop applicatons (it is not for code that runs on a web server).

// 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

// This is the Redirect URL defined for your Slack App in the Slack developer portal, and contains the above PHP.
loo_Oauth2.AppCallbackUrl = "https://yourwebserver.com/oauth2_redirect"
loo_Oauth2.ListenPort = 3017

loo_Oauth2.AuthorizationEndpoint = "https://slack.com/oauth/authorize"
loo_Oauth2.TokenEndpoint = "https://slack.com/api/oauth.access"

// Replace these with actual values.
loo_Oauth2.ClientId = "CLIENT_ID"
loo_Oauth2.ClientSecret = "CLIENT_SECRET"

loo_Oauth2.Scope = "team:read users:read"

// Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
ls_Url = loo_Oauth2.StartAuth()
if loo_Oauth2.LastMethodSuccess <> 1 then
    Write-Debug loo_Oauth2.LastErrorText
    destroy loo_Oauth2
    return
end if

Write-Debug "url = " + ls_Url

// Launch the default browser on the system and navigate to the url.
// The LaunchBrowser method was added in Chilkat v10.1.2.
li_Success = loo_Oauth2.LaunchBrowser(ls_Url)
if li_Success = 0 then
    Write-Debug loo_Oauth2.LastErrorText
    destroy loo_Oauth2
    return
end if

// Wait for the user to approve or deny authorization in the browser.
li_NumMsWaited = 0
do while (li_NumMsWaited < 90000) AND (loo_Oauth2.AuthFlowState < 3)
    loo_Oauth2.SleepMs(100)
    li_NumMsWaited = li_NumMsWaited + 100
loop

// 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 loo_Oauth2.AuthFlowState < 3 then
    loo_Oauth2.Cancel()
    Write-Debug "No response from the browser!"
    destroy loo_Oauth2
    return
end if

// 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 loo_Oauth2.AuthFlowState = 5 then
    Write-Debug "OAuth2 failed to complete."
    Write-Debug loo_Oauth2.FailureInfo
    destroy loo_Oauth2
    return
end if

if loo_Oauth2.AuthFlowState = 4 then
    Write-Debug "OAuth2 authorization was denied."
    Write-Debug loo_Oauth2.AccessTokenResponse
    destroy loo_Oauth2
    return
end if

if loo_Oauth2.AuthFlowState <> 3 then
    Write-Debug "Unexpected AuthFlowState:" + string(loo_Oauth2.AuthFlowState)
    destroy loo_Oauth2
    return
end if

Write-Debug "OAuth2 authorization granted!"
Write-Debug "Access Token = " + loo_Oauth2.AccessToken

// Get the full JSON response:
loo_Json = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.Load(loo_Oauth2.AccessTokenResponse)
loo_Json.EmitCompact = 0

// The JSON response looks like this:

// {
//   "ok": true,
//   "access_token": "xoxp-348475395242-348621810805-4768936228341-9f512b295124e7c9846ce63cb1464c4d",
//   "scope": "identify,team:read,users:read",
//   "user_id": "UA8HZRUPP",
//   "team_id": "TA3DZBN74",
//   "enterprise_id": null,
//   "team_name": "Chilkat Testing"
// }

Write-Debug loo_Json.Emit()

// Save the JSON to a file for future requests.
loo_Fac = create oleobject
// Use "Chilkat_9_5_0.FileAccess" for versions of Chilkat < 10.0.0
li_rc = loo_Fac.ConnectToNewObject("Chilkat.FileAccess")

loo_Fac.WriteEntireTextFile("qa_data/tokens/slack.json",loo_Json.Emit(),"utf-8",0)


destroy loo_Oauth2
destroy loo_Json
destroy loo_Fac