SQL Server

Refresh Schwab OAuth2 Access Token

See more Schwab Examples

Demonstrates how to refresh a Schwab OAuth2 access token. SQL Server

-- 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)
    DECLARE @success int
    SELECT @success = 0

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

    -- See Get Schwab OAuth2 Access Token 
    -- for sample code showing how to obtain a Schwab access token for desktop apps.

    -- This example assumes we previously obtained an OAuth2 access token for Schwab.

    DECLARE @jsonToken int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonToken OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OAMethod @jsonToken, 'LoadFile', @success OUT, 'qa_data/tokens/schwab-access-token.json'
    IF @success <> 1
      BEGIN

        PRINT 'Failed to load schwab-access-token.json'
        EXEC @hr = sp_OADestroy @jsonToken
        RETURN
      END

    -- The access token JSON looks something like this:

    -- {
    --   "expires_in": 3600,
    --   "x_refresh_token_expires_in": 8726400,
    --   "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
    --   "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
    --   "token_type": "bearer"
    -- }

    DECLARE @oauth2 int
    EXEC @hr = sp_OACreate 'Chilkat.OAuth2', @oauth2 OUT

    EXEC sp_OASetProperty @oauth2, 'TokenEndpoint', 'https://api.schwabapi.com/v1/oauth/token'

    -- Replace these with actual values.
    EXEC sp_OASetProperty @oauth2, 'ClientId', 'APP_KEY'
    EXEC sp_OASetProperty @oauth2, 'ClientSecret', 'APP_SECRET'
    EXEC sp_OASetProperty @oauth2, 'UseBasicAuth', 1

    -- Get the "refresh_token"
    EXEC sp_OAMethod @jsonToken, '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 = 0
      BEGIN
        EXEC sp_OAGetProperty @oauth2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jsonToken
        EXEC @hr = sp_OADestroy @oauth2
        RETURN
      END

    -- The response contains a new access token, but we must keep
    -- our existing refresh token for when we need to refresh again in the future.
    EXEC sp_OAGetProperty @oauth2, 'AccessToken', @sTmp0 OUT
    EXEC sp_OAMethod @jsonToken, 'UpdateString', @success OUT, 'access_token', @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.
    DECLARE @sbJson int
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbJson OUT

    EXEC sp_OASetProperty @jsonToken, 'EmitCompact', 0

    EXEC sp_OAMethod @jsonToken, 'EmitSb', @success OUT, @sbJson
    EXEC sp_OAMethod @sbJson, 'WriteFile', @success OUT, 'qa_data/tokens/schwab-access-token.json', 'utf-8', 0


    PRINT 'OAuth2 token refreshed!'

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

    EXEC @hr = sp_OADestroy @jsonToken
    EXEC @hr = sp_OADestroy @oauth2
    EXEC @hr = sp_OADestroy @sbJson


END
GO