VB.NET

Explaining the Rest ClearResponseBodyStream Method

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The ClearResponseBodyStream method would be needed if your applicaiton called SetResponseBodyStream to send the response to a stream for one request, but then wants to subsequently do something else. The application must call ClearResponseBodyStream to no longer send responses to the stream. VB.NET

Dim success As Boolean = False

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim rest As New Chilkat.Rest

' Connect to the web server
Dim bTls As Boolean = True
Dim port As Integer = 443
Dim bAutoReconnect As Boolean = True
success = rest.Connect("www.chilkatsoft.com",port,bTls,bAutoReconnect)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' Setup a file stream for the download
Dim fileStream As New Chilkat.Stream
fileStream.SinkFile = "qa_output/starfish.jpg"

' Indicate that the call to FullRequestNoBody should send the response body
' to fileStream if the response status code is 200.
' If a non-success response status code is received, then nothing
' is streamed to the output file and the error response is returned by FullRequestNoBody.
Dim expectedStatus As Integer = 200
rest.SetResponseBodyStream(expectedStatus,True,fileStream)

Dim responseStr As String = rest.FullRequestNoBody("GET","/images/starfish.jpg")
If (rest.LastMethodSuccess = False) Then
    ' Examine the request/response to see what happened.
    Debug.WriteLine("response status code = " & rest.ResponseStatusCode)
    Debug.WriteLine("response status text = " & rest.ResponseStatusText)
    Debug.WriteLine("response header: " & rest.ResponseHeader)
    Debug.WriteLine("response body (if any): " & responseStr)
    Debug.WriteLine("---")
    Debug.WriteLine("LastRequestStartLine: " & rest.LastRequestStartLine)
    Debug.WriteLine("LastRequestHeader: " & rest.LastRequestHeader)
    Exit Sub
End If


Debug.WriteLine("downloaded starfish.jpg")

' Clear the response body stream previously set in the call to SetResponseBodyStream.
rest.ClearResponseBodyStream()

' Download something else, but this time send the response body to bd.
Dim bd As New Chilkat.BinData
success = rest.FullRequestNoBodyBd("GET","/images/penguins.jpg",bd)
If (success = False) Then
    ' Examine the request/response to see what happened.
    Debug.WriteLine("response status code = " & rest.ResponseStatusCode)
    Debug.WriteLine("response status text = " & rest.ResponseStatusText)
    Debug.WriteLine("response header: " & rest.ResponseHeader)
    Debug.WriteLine("response body (if any): " & bd.GetString("utf-8"))
    Debug.WriteLine("---")
    Debug.WriteLine("LastRequestStartLine: " & rest.LastRequestStartLine)
    Debug.WriteLine("LastRequestHeader: " & rest.LastRequestHeader)
    Exit Sub
End If


' Save the contents of bd to a file.
success = bd.WriteFile("qa_output/penguins.jpg")

Debug.WriteLine("Success: " & success)