(Go) 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.)

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    // 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"
    // }

    json := chilkat.NewJsonObject()
    success := json.LoadFile("qa_data/tokens/ebay-access-token.json")
    if success == false {
        fmt.Println("Failed to load the existing ebay access token JSON.")
        json.DisposeJsonObject()
        return
    }

    oauth2 := chilkat.NewOAuth2()

    oauth2.SetTokenEndpoint("https://api.sandbox.ebay.com/identity/v1/oauth2/token")

    // Replace these with actual values.
    oauth2.SetClientId("EBAY_CLIENT_ID")
    oauth2.SetClientSecret("EBAY_CLIENT_SECRET")

    // Get the "refresh_token"
    oauth2.SetRefreshToken(json.StringOf("refresh_token"))

    // Send the HTTP POST to refresh the access token..
    success = oauth2.RefreshAccessToken()
    if success != true {
        fmt.Println(oauth2.LastErrorText())
        json.DisposeJsonObject()
        oauth2.DisposeOAuth2()
        return
    }

    // Load the access token response into the JSON object 
    json.Load(oauth2.AccessTokenResponse())

    // 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.
    json.SetEmitCompact(false)
    json.WriteFile("qa_data/tokens/ebay-access-token.json")

    fmt.Println("OAuth2 authorization granted!")
    fmt.Println("New Access Token = ", oauth2.AccessToken())

    json.DisposeJsonObject()
    oauth2.DisposeOAuth2()