Visual FoxPro GMail: Get a specific message (format="minimal")

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Gets a specific message using format=minimal.

Documentation: https://developers.google.com/gmail/api/v1/reference/users/messages/get

LOCAL loRest
LOCAL lnSuccess
LOCAL loOauth2
LOCAL loSbJson
LOCAL loJson
LOCAL lcId
LOCAL lcThreadId
LOCAL lcSnippet
LOCAL lcHistoryId
LOCAL lcInternalDate
LOCAL lnSizeEstimate
LOCAL i
LOCAL lnCount_i
LOCAL lcStrVal

loRest = CreateObject('Chilkat_9_5_0.Rest')

*   Provide a previously obtained OAuth2 access token.
loOauth2 = CreateObject('Chilkat_9_5_0.OAuth2')
loOauth2.AccessToken = "OAUTH2_ACCESS_TOKEN"
loRest.SetAuthOAuth2(loOauth2)

lnSuccess = loRest.Connect("www.googleapis.com",443,1,1)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loOauth2
    CANCEL
ENDIF

loRest.AddPathParam("messageId","15fc237e79da4174")

loRest.AddQueryParam("format","minimal")

loSbJson = CreateObject('Chilkat_9_5_0.StringBuilder')
lnSuccess = loRest.FullRequestNoBodySb("GET","/gmail/v1/users/me/messages/messageId",loSbJson)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loOauth2
    RELEASE loSbJson
    CANCEL
ENDIF

IF (loRest.ResponseStatusCode <> 200) THEN
    ? "Received error response code: " + STR(loRest.ResponseStatusCode)
    ? "Response body:"
    ? loSbJson.GetAsString()
    RELEASE loRest
    RELEASE loOauth2
    RELEASE loSbJson
    CANCEL
ENDIF

loJson = CreateObject('Chilkat_9_5_0.JsonObject')
loJson.LoadSb(loSbJson)

*  The following code parses the JSON response.
*  A sample JSON response is shown below the sample code.

lcId = loJson.StringOf("id")
lcThreadId = loJson.StringOf("threadId")
lcSnippet = loJson.StringOf("snippet")
lcHistoryId = loJson.StringOf("historyId")
lcInternalDate = loJson.StringOf("internalDate")
lnSizeEstimate = loJson.IntOf("sizeEstimate")
i = 0
lnCount_i = loJson.SizeOfArray("labelIds")
DO WHILE i < lnCount_i
    loJson.I = i
    lcStrVal = loJson.StringOf("labelIds[i]")
    i = i + 1
ENDDO

? "Example Completed."

RELEASE loRest
RELEASE loOauth2
RELEASE loSbJson
RELEASE loJson

Sample JSON Response Body

{
  "id": "15fc237e79da4174",
  "threadId": "15fc237e79da4174",
  "labelIds": [
    "IMPORTANT",
    "SENT",
    "INBOX"
  ],
  "snippet": "This is a test email with 2 attachments.",
  "historyId": "1582",
  "internalDate": "1510791964000",
  "sizeEstimate": 11153
}