Visual Basic 6.0

Send a Staged REST Request from a StringBuilder

Demonstrates Rest.SendReqSb, which sends a request whose text body is read from a StringBuilder, 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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Visual Basic 6.0

Dim success As Long
success = 0

Dim rest As New ChilkatRest
Dim bTls As Long
bTls = 1
Dim bAutoReconnect As Long
bAutoReconnect = 1
success = rest.Connect("example.com",443,bTls,bAutoReconnect)
If (success = 0) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

success = rest.AddHeader("Content-Type","application/json")

'  Send a request whose text body is read from a StringBuilder.
Dim sbBody As New ChilkatStringBuilder
success = sbBody.Append("{ ""query"": ""chilkat"" }")
success = rest.SendReqSb("POST","/api/search",sbBody)
If (success = 0) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

'  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.
Dim statusCode As Long
statusCode = rest.ReadResponseHeader()
If (statusCode < 0) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

Debug.Print "Response status code: " & statusCode

'  Read the response body as text.
Dim responseBody As String
responseBody = rest.ReadRespBodyString()
If (rest.LastMethodSuccess = 0) Then
    Debug.Print rest.LastErrorText
    Exit Sub
End If

Debug.Print responseBody