(SQL Server) RSAP Union API - Get OAuth2 Access Token

Demonstrates how to get an OAuth2 access token for the RSAP Union API. Note: This uses the client credentials flow, which does NOT require an interactive engagement using a browser.

For more information, see https://app.swaggerhub.com/apis-docs/pderas/RSAP/2.0.1#/Authentication/getOauthToken

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)
    -- This example assumes the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

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

    DECLARE @success int

    -- The following JSON is sent in the request body.

    -- {
    --   "grant_type": "client_credentials",
    --   "client_id": 1234,
    --   "client_secret": "23456abcde"
    -- }

    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_OAMethod @json, 'UpdateString', @success OUT, 'grant_type', 'client_credentials'
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'client_id', 1234
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'client_secret', '23456abcde'

    EXEC sp_OAMethod @http, 'SetRequestHeader', NULL, 'Content-type', 'application/json'

    -- Add the client certificate TLS authentication.
    DECLARE @cert int
    -- Use "Chilkat_9_5_0.Cert" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert OUT

    EXEC sp_OAMethod @cert, 'LoadFromFile', @success OUT, 'qa_data/certs_and_keys/union_client_certificate.crt'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END

    DECLARE @privKey int
    -- Use "Chilkat_9_5_0.PrivateKey" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.PrivateKey', @privKey OUT

    EXEC sp_OAMethod @privKey, 'LoadAnyFormatFile', @success OUT, 'qa_data/certs_and_keys/union_client_certificate.nopass.key', ''
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @privKey, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @cert
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    -- Associate the private key with the cert.
    -- This will fail if the private key is not actually the correct one that corresponds to the public key stored within the cert.
    EXEC sp_OAMethod @cert, 'SetPrivateKey', @success OUT, @privKey
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @cert
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    -- Tell HTTP to use the cert for client TLS certificate authentication.
    EXEC sp_OAMethod @http, 'SetSslClientCert', @success OUT, @cert
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @cert
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    DECLARE @resp int
    EXEC sp_OAMethod @http, 'PostJson3', @resp OUT, 'https://api-test.rsap.ca/oauth/token', 'application/json', @json
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @cert
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    DECLARE @sbResponseBody int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbResponseBody OUT

    EXEC sp_OAMethod @resp, 'GetBodySb', @success OUT, @sbResponseBody
    DECLARE @jResp int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jResp OUT

    EXEC sp_OAMethod @jResp, 'LoadSb', @success OUT, @sbResponseBody
    EXEC sp_OASetProperty @jResp, 'EmitCompact', 0


    PRINT 'Response Body:'
    EXEC sp_OAMethod @jResp, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    DECLARE @respStatusCode int
    EXEC sp_OAGetProperty @resp, 'StatusCode', @respStatusCode OUT

    PRINT 'Response Status Code = ' + @respStatusCode
    IF @respStatusCode >= 400
      BEGIN

        PRINT 'Response Header:'
        EXEC sp_OAGetProperty @resp, 'Header', @sTmp0 OUT
        PRINT @sTmp0

        PRINT 'Failed.'
        EXEC @hr = sp_OADestroy @resp

        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @cert
        EXEC @hr = sp_OADestroy @privKey
        EXEC @hr = sp_OADestroy @sbResponseBody
        EXEC @hr = sp_OADestroy @jResp
        RETURN
      END
    EXEC @hr = sp_OADestroy @resp

    -- Sample JSON response:
    -- (Sample code for parsing the JSON response is shown below)

    -- {
    --   "token_type": "Bearer",
    --   "expires_in": 3600,
    --   "access_token": "eyJ0eXAi...LnE"
    -- }

    -- This token expires in 1 hour.  Your application could re-use the same token for up to an hour,
    -- or it can simply get a new access token before each request (if you're not doing too many requests).
    EXEC sp_OAMethod @jResp, 'WriteFile', @success OUT, 'qa_data/tokens/rsapToken.json'

    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @cert
    EXEC @hr = sp_OADestroy @privKey
    EXEC @hr = sp_OADestroy @sbResponseBody
    EXEC @hr = sp_OADestroy @jResp


END
GO