(SQL Server) Refresh eBay Application Access Token

This example shows how to get a new eBay REST API access token when the original is close to expiration.

Note: This example requires Chilkat v9.5.0.80 or greater. (This example was written on 21-August-2019, before v9.5.0.80 was released. If Contact Chilkat for a pre-release if the current Chilkat version is not yet at 9.5.0.80 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
    -- 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.

    -- The previously fetched eBay access token looks like this:

    -- {
    --   "access_token": "v^1.1#i^1# ... HwSAAA=",
    --   "expires_in": 7200,
    --   "refresh_token": "v^1.1#i^1# ... FXjEyODQ=",
    --   "refresh_token_expires_in": 47304000,
    --   "token_type": "User Access Token"
    -- }

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

    DECLARE @success int
    EXEC sp_OAMethod @json, 'LoadFile', @success OUT, 'qa_data/tokens/ebay-access-token.json'
    IF @success = 0
      BEGIN

        PRINT 'Failed to load the existing ebay access token JSON.'
        EXEC @hr = sp_OADestroy @json
        RETURN
      END

    DECLARE @oauth2 int
    -- Use "Chilkat_9_5_0.OAuth2" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.OAuth2', @oauth2 OUT

    EXEC sp_OASetProperty @oauth2, 'TokenEndpoint', 'https://api.sandbox.ebay.com/identity/v1/oauth2/token'

    -- Replace these with actual values.
    EXEC sp_OASetProperty @oauth2, 'ClientId', 'EBAY_CLIENT_ID'
    EXEC sp_OASetProperty @oauth2, 'ClientSecret', 'EBAY_CLIENT_SECRET'

    -- Get the "refresh_token"
    EXEC sp_OAMethod @json, 'StringOf', @sTmp0 OUT, 'refresh_token'
    EXEC sp_OASetProperty @oauth2, 'RefreshToken', @sTmp0

    -- Send the HTTP POST to refresh the access token..
    EXEC sp_OAMethod @oauth2, 'RefreshAccessToken', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @oauth2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @oauth2
        RETURN
      END

    -- Load the access token response into the JSON object 
    EXEC sp_OAGetProperty @oauth2, 'AccessTokenResponse', @sTmp0 OUT
    EXEC sp_OAMethod @json, 'Load', @success OUT, @sTmp0

    -- Save the new JSON access token response to a file.
    -- The access + refresh tokens contained in this JSON will be needed for the next refresh.
    EXEC sp_OASetProperty @json, 'EmitCompact', 0
    EXEC sp_OAMethod @json, 'WriteFile', @success OUT, 'qa_data/tokens/ebay-access-token.json'


    PRINT 'OAuth2 authorization granted!'

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

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


END
GO