Lua

Refresh Schwab OAuth2 Access Token

See more Schwab Examples

Demonstrates how to refresh a Schwab OAuth2 access token. Lua

local chilkat = require("chilkat")

-- 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.

local jsonToken = chilkat.JsonObject.new()
local success = jsonToken:load_file("qa_data/tokens/schwab-access-token.json")
if not success then
    print("Failed to load schwab-access-token.json")
    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"
-- }

local oauth2 = chilkat.OAuth2.new()

oauth2.token_endpoint = "https://api.schwabapi.com/v1/oauth/token"

-- Replace these with actual values.
oauth2.client_id = "APP_KEY"
oauth2.client_secret = "APP_SECRET"
oauth2.use_basic_auth = true

-- Get the "refresh_token"
oauth2.refresh_token = jsonToken:string_of("refresh_token")

-- Send the HTTP POST to refresh the access token..
success = oauth2:refresh_access_token()
if not success then
    print(oauth2.last_error_text)
    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.
jsonToken:update_string("access_token", oauth2.access_token)

-- 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.
local sbJson = chilkat.StringBuilder.new()
jsonToken.emit_compact = false

jsonToken:emit_sb(sbJson)
sbJson:write_file("qa_data/tokens/schwab-access-token.json", "utf-8", false)

print("OAuth2 token refreshed!")
print("New Access Token = " .. oauth2.access_token)