Swift

Refresh Schwab OAuth2 Access Token

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Demonstrates how to refresh a Schwab OAuth2 access token. Swift

func chilkatTest() {
    var success: Bool = false

    // 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.

    let jsonToken = CkoJsonObject()!
    success = jsonToken.loadFile(path: "qa_data/tokens/schwab-access-token.json")
    if success != true {
        print("Failed to load schwab-access-token.json")
        return
    }

    // 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"
    // }

    let oauth2 = CkoOAuth2()!

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

    // Replace these with actual values.
    oauth2.clientId = "APP_KEY"
    oauth2.clientSecret = "APP_SECRET"
    oauth2.useBasicAuth = true

    // Get the "refresh_token"
    oauth2.refreshToken = jsonToken.string(of: "refresh_token")

    // Send the HTTP POST to refresh the access token..
    success = oauth2.refreshAccessToken()
    if success == false {
        print("\(oauth2.lastErrorText!)")
        return
    }

    // 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.updateString(jsonPath: "access_token", value: oauth2.accessToken)

    // 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.
    let sbJson = CkoStringBuilder()!
    jsonToken.emitCompact = false

    jsonToken.emitSb(sb: sbJson)
    sbJson.writeFile(path: "qa_data/tokens/schwab-access-token.json", charset: "utf-8", emitBom: false)

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

}