(Visual FoxPro) Amazon SP-API Request an LWA access token

See more Amazon SP-API Examples

Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://developer-docs.amazon.com/sp-api/docs/connecting-to-the-selling-partner-api

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL loHttp
LOCAL loReq
LOCAL loResp
LOCAL lnStatusCode
LOCAL loJson

lnSuccess = 0

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

loHttp = CreateObject('Chilkat.Http')

* Implements the following CURL command:

* curl -X POST https://example.com/auth/o2/token \
*   -H "Host: api.amazon.com" \
*   -H "Content-Type: application/x-www-form-urlencoded;charset=UTF-8" \
*   -d "grant_type=refresh_token" \
*   -d "refresh_token=Aztr|..." \
*   -d "client_id=foodev" \
*   -d "client_secret=Y76SDl2F"

* Use the following online tool to generate HTTP code from a CURL command
* Convert a cURL Command to HTTP Source Code

loReq = CreateObject('Chilkat.HttpRequest')
loReq.AddParam("grant_type","refresh_token")
loReq.AddParam("refresh_token","Aztr|...")
loReq.AddParam("client_id","foodev")
loReq.AddParam("client_secret","Y76SDl2F")

loReq.AddHeader("Host","api.amazon.com")

loReq.HttpVerb = "POST"
loReq.ContentType = "application/x-www-form-urlencoded"

loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpReq("https://api.amazon.com/auth/o2/token",loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
ENDIF

lnStatusCode = loResp.StatusCode
? "Status Code = " + STR(lnStatusCode)

loJson = CreateObject('Chilkat.JsonObject')
loJson.Load(loResp.BodyStr)

loJson.EmitCompact = 0
? loJson.Emit()

IF (lnStatusCode <> 200) THEN
    ? "Failed."
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    RELEASE loJson
    CANCEL
ENDIF

* Success returns this JSON:

* {
*   "access_token": "Atza|...",
*   "refresh_token": "Atzr|...",
*   "token_type": "bearer",
*   "expires_in": 3600
* }

* Save the JSON token to a file for use in subsequent calls.
* (this example is passing a relative file path.  You don't need to save to a file
* if, for example, you keep the access token in-memory for subsequent use...)
lnSuccess = loJson.WriteFile("qa_data/tokens/sp_api_lwa_token.json")

? "access_token: " + loJson.StringOf("access_token")
? "Success."

RELEASE loHttp
RELEASE loReq
RELEASE loResp
RELEASE loJson