PowerBuilder

Read the REST Response Header and Status Code

Demonstrates Rest.ReadResponseHeader, which reads the HTTP response status line and header fields after a staged send. The returned integer is the HTTP status code, or -1 if no response was received.

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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integer li_rc
integer li_Success
oleobject loo_Rest
integer li_BTls
integer li_BAutoReconnect
integer li_StatusCode

li_Success = 0

loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat.Rest")
if li_rc < 0 then
    destroy loo_Rest
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_BTls = 1
li_BAutoReconnect = 1
li_Success = loo_Rest.Connect("example.com",443,li_BTls,li_BAutoReconnect)
if li_Success = 0 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    return
end if

li_Success = loo_Rest.SendReqNoBody("GET","/api/items/123")
if li_Success = 0 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    return
end if

//  Read the HTTP response status line and header fields.  The returned integer is the HTTP status
//  code (such as 200, 404, or 500), or -1 if no response was received.
li_StatusCode = loo_Rest.ReadResponseHeader()
if li_StatusCode < 0 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    return
end if

Write-Debug "Response status code: " + string(li_StatusCode)


destroy loo_Rest