Visual Basic 6.0

Send a Staged REST Request with a Binary Body

Demonstrates Rest.SendReqBd, which sends a request whose binary body is read from a BinData, then reads the response in separate steps.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

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

'  The file paths are relative to the application's current working directory.  Absolute paths
'  may also be used.  Supply the paths appropriate to your own environment.

'  Send a request whose binary body is read from a BinData.
Dim bdBody As New ChilkatBinData
Dim bLoaded As Long
bLoaded = bdBody.LoadFile("qa_data/image.png")
If (bLoaded <> 1) Then
    Debug.Print "Failed to load the request body file."
    Exit Sub
End If

success = rest.AddHeader("Content-Type","image/png")

success = rest.SendReqBd("PUT","/api/images/1",bdBody)
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