Lianja

Send a Staged Multipart REST Request

Demonstrates Rest.SendReqMultipart, which sends a multipart request using the parts configured on the object, then reads the response in separate steps.

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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llSuccess = .F.

loRest = createobject("CkRest")
llBTls = .T.
llBAutoReconnect = .T.
llSuccess = loRest.Connect("example.com",443,llBTls,llBAutoReconnect)
if (llSuccess = .F.) then
    ? loRest.LastErrorText
    release loRest
    return
endif

//  Configure one multipart part before sending.
loRest.PartSelector = "1"
loRest.AddHeader("Content-Type","text/plain")
loRest.AddHeader("Content-Disposition",'form-data; name="field1"')
llSuccess = loRest.SetMultipartBodyString("value1")
if (llSuccess = .F.) then
    ? loRest.LastErrorText
    release loRest
    return
endif

//  Send the multipart request using the configured parts.
llSuccess = loRest.SendReqMultipart("POST","/api/upload")
if (llSuccess = .F.) then
    ? loRest.LastErrorText
    release loRest
    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.
lnStatusCode = loRest.ReadResponseHeader()
if (lnStatusCode < 0) then
    ? loRest.LastErrorText
    release loRest
    return
endif

? "Response status code: " + str(lnStatusCode)

//  Read the response body as text.
lcResponseBody = loRest.ReadRespBodyString()
if (loRest.LastMethodSuccess = .F.) then
    ? loRest.LastErrorText
    release loRest
    return
endif

? lcResponseBody


release loRest