Xbase++

PayPal -- Get an OAuth 2.0 Access Token

See more PayPal Examples

Demonstrates how to send a request to get a PayPal OAuth2 access token. Sends an HTTP request equivalent to the following:

curl https://api.sandbox.paypal.com/v1/oauth2/token \
  -H "Accept: application/json" \
  -H "Accept-Language: en_US" \
  -u "Client-Id:Secret" \
  -d "grant_type=client_credentials"

Xbase++

LOCAL nSuccess
LOCAL oRest
LOCAL nBAutoReconnect
LOCAL cResponseStr
LOCAL oJson
LOCAL oDateTime
LOCAL nBLocalTime
LOCAL nDtNow
LOCAL oSbResponse
LOCAL nBEmitBom

nSuccess := 0

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

oRest := CreateObject("Chilkat.Rest")

//  Make the initial connection.
//  A single REST object, once connected, can be used for many PayPal REST API calls.
//  The auto-reconnect indicates that if the already-established HTTPS connection is closed,
//  then it will be automatically re-established as needed.
nBAutoReconnect := 1
nSuccess := oRest:Connect("api.sandbox.paypal.com", 443, 1, nBAutoReconnect)
IF (nSuccess != 1)
    ? oRest:LastErrorText
    oRest:destroy()
    RETURN
ENDIF

//  Duplicate this request:

//  	curl https://api.sandbox.paypal.com/v1/oauth2/token \
//  	  -H "Accept: application/json" \
//  	  -H "Accept-Language: en_US" \
//  	  -u "Client-Id:Secret" \
//  	  -d "grant_type=client_credentials"

oRest:AddHeader("Accept", "application/json")
oRest:AddHeader("Accept-Language", "en_US")

//  For additional help on where to find  your client ID and API secret, see PayPal Client_ID and API_Secret
oRest:SetAuthBasic("PAYPAL_REST_API_CLIENT_ID", "PAYPAL_REST_API_SECRET")

oRest:AddQueryParam("grant_type", "client_credentials")

cResponseStr := oRest:FullRequestFormUrlEncoded("POST", "/v1/oauth2/token")
IF (oRest:LastMethodSuccess != 1)
    ? oRest:LastErrorText
    oRest:destroy()
    RETURN
ENDIF

? oRest:LastRequestHeader

//  A sample response:

//  	{
//  	  "scope": "https://api.paypal.com/v1/payments/.* https://api.paypal.com/v1/vault/credit-card https://api.paypal.com/v1/vault/credit-card/.*",
//  	  "access_token": "EEwJ6tF9x5WCIZDYzyZGaz6Khbw7raYRIBV_WxVvgmsG",
//  	  "token_type": "Bearer",
//  	  "app_id": "APP-6XR95014BA15863X",
//  	  "expires_in": 28800
//  	}

oJson := CreateObject("Chilkat.JsonObject")
oJson:Load(cResponseStr)
oJson:EmitCompact := 0

//  Check the response status code.  A 200 indicates success..
IF (oRest:ResponseStatusCode != 200)
    ? oJson:Emit()
    ? "Failed."
    oRest:destroy()
    oJson:destroy()
    RETURN
ENDIF

//  Given that the access token expires in approx 8 hours,
//  let's record the date/time this token was created.
//  This will allow us to know beforehand if the token
//  is expired (and we can then fetch a new token).
oDateTime := CreateObject("Chilkat.CkDateTime")
nBLocalTime := 0
nDtNow := oDateTime:GetAsUnixTime(nBLocalTime)
oJson:AppendInt("tokenCreateTimeUtc", nDtNow)

//  Examine the access token and save to a file.
? "Access Token: " + oJson:StringOf("access_token")
? "Full JSON Response:"
? oJson:Emit()

oSbResponse := CreateObject("Chilkat.StringBuilder")
oSbResponse:Append(oJson:Emit())
nBEmitBom := 0
oSbResponse:WriteFile("qa_data/tokens/paypal.json", "utf-8", nBEmitBom)

oRest:destroy()
oJson:destroy()
oDateTime:destroy()
oSbResponse:destroy()