Xbase++

Send a Staged REST Request with No Body

Demonstrates Rest.SendReqNoBody, which sends a request without a body as the first step of the staged request model. After it succeeds, the response header and body are read separately.

Background. The staged request model separates sending from reading: a SendReq method transmits the request, ReadResponseHeader reads the status line and headers, and a ReadResp method reads the body. This gives fine control over large or streamed messages compared with the single-call full-request methods.

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Xbase++

LOCAL nSuccess
LOCAL oRest
LOCAL nBTls
LOCAL nBAutoReconnect
LOCAL nStatusCode
LOCAL cResponseBody

nSuccess := 0

oRest := CreateObject("Chilkat.Rest")
nBTls := 1
nBAutoReconnect := 1
nSuccess := oRest:Connect("example.com", 443, nBTls, nBAutoReconnect)
IF (nSuccess == 0)
    ? oRest:LastErrorText
    oRest:destroy()
    RETURN
ENDIF

//  Send a request without a request body.  This is a low-level send: after it succeeds, read the
//  response header and body separately.
nSuccess := oRest:SendReqNoBody("GET", "/api/items/123")
IF (nSuccess == 0)
    ? oRest:LastErrorText
    oRest:destroy()
    RETURN
ENDIF

//  After sending, read the response status line and header fields.  The return value is the HTTP
//  status code, or -1 if no response was received.
nStatusCode := oRest:ReadResponseHeader()
IF (nStatusCode < 0)
    ? oRest:LastErrorText
    oRest:destroy()
    RETURN
ENDIF

? "Response status code: " + Str(nStatusCode)

//  Read the response body as text.
cResponseBody := oRest:ReadRespBodyString()
IF (oRest:LastMethodSuccess == 0)
    ? oRest:LastErrorText
    oRest:destroy()
    RETURN
ENDIF

? cResponseBody

oRest:destroy()