Chilkat Examples

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Visual FoxPro Web API Examples

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(Visual FoxPro) Check PayPal Access Token Expiration

Checks to see if the PayPal access token expired.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL loJson
LOCAL lnSuccess
LOCAL loDateTime
LOCAL lnBLocalTime
LOCAL lnDtNow
LOCAL lnDtCreate
LOCAL lnNumSeconds
LOCAL lnExpires_in

* Note: Requires Chilkat v9.5.0.64 or greater.

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

* In the example linked here: PayPal OAuth2 Token,
* we fetched a PayPal access token and saved it to a JSON file.
* We also recorded the current date/time.
* Load this JSON file and compare the current date/time with the fetch date/time
* and the "expires_in" value to see if the token is expired.

loJson = CreateObject('Chilkat_9_5_0.JsonObject')
lnSuccess = loJson.LoadFile("qa_data/tokens/paypal.json")
IF (lnSuccess <> 1) THEN
    ? "Failed to load access key json file."
    RELEASE loJson
    CANCEL
ENDIF

* Get the current date/time.
loDateTime = CreateObject('Chilkat_9_5_0.CkDateTime')
lnBLocalTime = 0
lnDtNow = loDateTime.GetAsUnixTime(lnBLocalTime)

* Get the access token create date/time
lnDtCreate = loJson.IntOf("tokenCreateTimeUtc")

* Find out how many seconds have elapsed.
lnNumSeconds = lnDtNow - lnDtCreate

* Get the expires_in value from the JSON.
lnExpires_in = loJson.IntOf("expires_in")

? "token age (in seconds) = " + STR(lnNumSeconds)
? "expires_in = " + STR(lnExpires_in)

* If the token expired, or if it will expire in 5 minutes or less,
* get another token.
IF (lnNumSeconds < (lnExpires_in - 300)) THEN
    ? "The token is not yet expired.  No need to fetch another."
    RELEASE loJson
    RELEASE loDateTime
    CANCEL
ENDIF

? "Time to fetch a new access token..."

* Get another token..
* See the example at Get PayPal OAuth2 Token
* to get another token..

RELEASE loJson
RELEASE loDateTime


 

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