(SQL Server) 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

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- For more information about the OAuth2, see OAuth 2.0 Authorization Flow

    DECLARE @oauth2 int
    -- Use "Chilkat_9_5_0.OAuth2" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.OAuth2', @oauth2 OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- 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.
    EXEC sp_OASetProperty @oauth2, 'AppCallbackUrl', 'https://yourwebserver.com/oauth2_redirect'
    EXEC sp_OASetProperty @oauth2, 'ListenPort', 3017

    EXEC sp_OASetProperty @oauth2, 'AuthorizationEndpoint', 'https://slack.com/oauth/authorize'
    EXEC sp_OASetProperty @oauth2, 'TokenEndpoint', 'https://slack.com/api/oauth.access'

    -- Replace these with actual values.
    EXEC sp_OASetProperty @oauth2, 'ClientId', 'CLIENT_ID'
    EXEC sp_OASetProperty @oauth2, 'ClientSecret', 'CLIENT_SECRET'

    EXEC sp_OASetProperty @oauth2, 'Scope', 'team:read users:read'

    -- Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
    DECLARE @url nvarchar(4000)
    EXEC sp_OAMethod @oauth2, 'StartAuth', @url OUT
    EXEC sp_OAGetProperty @oauth2, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @oauth2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @oauth2
        RETURN
      END


    PRINT 'url = ' + @url

    -- Launch the default browser on the system and navigate to the url.
    -- The LaunchBrowser method was added in Chilkat v10.1.2.
    DECLARE @success int
    EXEC sp_OAMethod @oauth2, 'LaunchBrowser', @success OUT, @url
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @oauth2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @oauth2
        RETURN
      END

    -- Wait for the user to approve or deny authorization in the browser.
    DECLARE @numMsWaited int
    SELECT @numMsWaited = 0
    EXEC sp_OAGetProperty @oauth2, 'AuthFlowState', @iTmp0 OUT
    WHILE (@numMsWaited < 90000) and (@iTmp0 < 3)
      BEGIN
        EXEC sp_OAMethod @oauth2, 'SleepMs', NULL, 100
        SELECT @numMsWaited = @numMsWaited + 100
      END

    -- 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.

    EXEC sp_OAGetProperty @oauth2, 'AuthFlowState', @iTmp0 OUT
    IF @iTmp0 < 3
      BEGIN
        EXEC sp_OAMethod @oauth2, 'Cancel', @success OUT

        PRINT 'No response from the browser!'
        EXEC @hr = sp_OADestroy @oauth2
        RETURN
      END

    -- 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.

    EXEC sp_OAGetProperty @oauth2, 'AuthFlowState', @iTmp0 OUT
    IF @iTmp0 = 5
      BEGIN

        PRINT 'OAuth2 failed to complete.'
        EXEC sp_OAGetProperty @oauth2, 'FailureInfo', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @oauth2
        RETURN
      END

    EXEC sp_OAGetProperty @oauth2, 'AuthFlowState', @iTmp0 OUT
    IF @iTmp0 = 4
      BEGIN

        PRINT 'OAuth2 authorization was denied.'
        EXEC sp_OAGetProperty @oauth2, 'AccessTokenResponse', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @oauth2
        RETURN
      END

    EXEC sp_OAGetProperty @oauth2, 'AuthFlowState', @iTmp0 OUT
    IF @iTmp0 <> 3
      BEGIN

        EXEC sp_OAGetProperty @oauth2, 'AuthFlowState', @iTmp0 OUT
        PRINT 'Unexpected AuthFlowState:' + @iTmp0
        EXEC @hr = sp_OADestroy @oauth2
        RETURN
      END


    PRINT 'OAuth2 authorization granted!'

    EXEC sp_OAGetProperty @oauth2, 'AccessToken', @sTmp0 OUT
    PRINT 'Access Token = ' + @sTmp0

    -- Get the full JSON response:
    DECLARE @json int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    EXEC sp_OAGetProperty @oauth2, 'AccessTokenResponse', @sTmp0 OUT
    EXEC sp_OAMethod @json, 'Load', @success OUT, @sTmp0
    EXEC sp_OASetProperty @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"
    -- }

    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    -- Save the JSON to a file for future requests.
    DECLARE @fac int
    -- Use "Chilkat_9_5_0.FileAccess" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.FileAccess', @fac OUT

    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    EXEC sp_OAMethod @fac, 'WriteEntireTextFile', @success OUT, 'qa_data/tokens/slack.json', @sTmp0, 'utf-8', 0

    EXEC @hr = sp_OADestroy @oauth2
    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @fac


END
GO