Xbase++

Amazon SP-API Request an LWA access token

See more Amazon SP-API Examples

Request an LWA access token, make a secure HTTP POST to the LWA authentication server (https://api.amazon.com/auth/o2/token) Xbase++

LOCAL nSuccess
LOCAL oHttp
LOCAL oReq
LOCAL oResp
LOCAL nStatusCode
LOCAL oJson

nSuccess := 0

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

oHttp := 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

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

oReq:AddHeader("Host", "api.amazon.com")

oReq:HttpVerb := "POST"
oReq:ContentType := "application/x-www-form-urlencoded"

oResp := CreateObject("Chilkat.HttpResponse")
nSuccess := oHttp:HttpReq("https://api.amazon.com/auth/o2/token", oReq, oResp)
IF (nSuccess == 0)
    ? oHttp:LastErrorText
    oHttp:destroy()
    oReq:destroy()
    oResp:destroy()
    RETURN
ENDIF

nStatusCode := oResp:StatusCode
? "Status Code = " + Str(nStatusCode)

oJson := CreateObject("Chilkat.JsonObject")
oJson:Load(oResp:BodyStr)

oJson:EmitCompact := 0
? oJson:Emit()

IF (nStatusCode != 200)
    ? "Failed."
    oHttp:destroy()
    oReq:destroy()
    oResp:destroy()
    oJson:destroy()
    RETURN
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...)
nSuccess := oJson:WriteFile("qa_data/tokens/sp_api_lwa_token.json")

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

oHttp:destroy()
oReq:destroy()
oResp:destroy()
oJson:destroy()