(SQL Server) Amazon SP-API Request an LWA access token

See more Amazon SP-API Examples

Request an LWA access token, make a secure HTTP POST to the LWA authentication server (https://api.amazon.com/auth/o2/token)

For more information, see https://developer-docs.amazon.com/sp-api/docs/connecting-to-the-selling-partner-api

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

    -- Implements the following CURL command:

    -- curl -X POST https://example.com/auth/o2/token \
    --   -H "Host: api.amazon.com" \
    --   -H "Content-Type: application/x-www-form-urlencoded;charset=UTF-8" \
    --   -d "grant_type=refresh_token" \
    --   -d "refresh_token=Aztr|..." \
    --   -d "client_id=foodev" \
    --   -d "client_secret=Y76SDl2F"

    -- Use the following online tool to generate HTTP code from a CURL command
    -- Convert a cURL Command to HTTP Source Code

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

    EXEC sp_OAMethod @req, 'AddParam', NULL, 'grant_type', 'refresh_token'
    EXEC sp_OAMethod @req, 'AddParam', NULL, 'refresh_token', 'Aztr|...'
    EXEC sp_OAMethod @req, 'AddParam', NULL, 'client_id', 'foodev'
    EXEC sp_OAMethod @req, 'AddParam', NULL, 'client_secret', 'Y76SDl2F'

    EXEC sp_OAMethod @req, 'AddHeader', NULL, 'Host', 'api.amazon.com'

    DECLARE @resp int
    EXEC sp_OAMethod @http, 'PostUrlEncoded', @resp OUT, 'https://api.amazon.com/auth/o2/token', @req
    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 @req
        RETURN
      END

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

    PRINT 'Status Code = ' + @statusCode

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

    DECLARE @success int
    EXEC sp_OAGetProperty @resp, 'BodyStr', @sTmp0 OUT
    EXEC sp_OAMethod @json, 'Load', @success OUT, @sTmp0
    EXEC @hr = sp_OADestroy @resp

    EXEC sp_OASetProperty @json, 'EmitCompact', 0
    EXEC sp_OAMethod @json, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    IF @statusCode <> 200
      BEGIN

        PRINT 'Failed.'
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @req
        EXEC @hr = sp_OADestroy @json
        RETURN
      END

    -- Success returns this JSON:

    -- {
    --   "access_token": "Atza|...",
    --   "refresh_token": "Atzr|...",
    --   "token_type": "bearer",
    --   "expires_in": 3600
    -- }

    -- Save the JSON token to a file for use in subsequent calls.
    -- (this example is passing a relative file path.  You don't need to save to a file
    -- if, for example, you keep the access token in-memory for subsequent use...)
    DECLARE @success int
    EXEC sp_OAMethod @json, 'WriteFile', @success OUT, 'qa_data/tokens/sp_api_lwa_token.json'


    EXEC sp_OAMethod @json, 'StringOf', @sTmp0 OUT, 'access_token'
    PRINT 'access_token: ' + @sTmp0

    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @req
    EXEC @hr = sp_OADestroy @json


END
GO