Read the REST Response Body into a Stream

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Demonstrates Rest.ReadRespBodyStream, which reads the response body into a Stream. The optional flag sets the stream character set from the response Content-Type charset for textual responses.

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.

Dim success As Boolean = False

Dim rest As New Chilkat.Rest
Dim bTls As Boolean = True
Dim bAutoReconnect As Boolean = True
success = rest.Connect("example.com",443,bTls,bAutoReconnect)
If (success = False) Then
    Debug.WriteLine(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.

success = rest.SendReqNoBody("GET","/api/images/1")
If (success = False) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


Dim statusCode As Integer = rest.ReadResponseHeader()
If (statusCode < 0) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


'  Check for the expected success status code.  If the response is not 200, the body is likely
'  error text formatted as JSON, XML, or HTML rather than the expected binary content.  In that case
'  read the body as text, report it, and return.
If (statusCode <> 200) Then
    Dim sbError As New Chilkat.StringBuilder
    success = rest.ReadRespSb(sbError)
    If (success = False) Then
        Debug.WriteLine(rest.LastErrorText)
        Exit Sub
    End If

    Debug.WriteLine("Request failed with status code " & statusCode)
    Debug.WriteLine(sbError.GetAsString())
    Exit Sub
End If


'  The status code is 200.  Read the response body into a Stream.  Here the stream's sink is a local
'  file, which is appropriate for large or binary responses.
Dim respStream As New Chilkat.Stream
respStream.SinkFile = "qa_output/image.png"

'  If the 2nd argument is True and the response is textual, the stream's character set is set from
'  the response Content-Type charset.  It has no effect for binary responses.
Dim bAutoSetCharset As Boolean = True
success = rest.ReadRespBodyStream(respStream,bAutoSetCharset)
If (success = False) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If

Debug.WriteLine("Response body written to the stream sink.")