在VBA WinHttpRequest上捕获超时

Question

我希望设置超时值并在此事件发生时使用VBA和Excel捕获此事件。到目前为止，我尝试了XMLHTTP60和WinHttpRequest：

    Set XMLHTTP = CreateObject("WinHttp.WinHttpRequest.5.1")
    With XMLHTTP
        .setTimeouts 11, 11, 11, 11 'Values for testing to get a timeout
        '.setTimeouts TIMEOUT_LRESOLVE, TIMEOUT_LCONNECT, TIMEOUT_LSEND, TIMEOUT_LRECEIVE
        .Open "GET", currenturl, False
        .send
        '.waitForResponse 1 'testing
        If .responseText Like "*PATH_NOT_FOUND*" Or .responseText Like "*OUTSIDE_BOUNDS*" Then
            noroutefound = True
            GoTo skiploop
        End If
        str = Split(.responseText, "{""startTime"":")
        complstr = .responseText
    End With

但是，我无法捕获由超时或超时本身引起的错误。

我怎样才能赶上超时？

Answer 1

在预期错误之前和errHand中添加On Error GoTo errHand的错误处理：

'Code
On Error GoTo errHand:
'Code producing error
Exit Sub
errHand

If err.Number <> 0 Then
     Debug.Print err.Message
End If
Exit Sub

如果您有感兴趣的错误号，则可以使用select case err.Number以定制的方式处理特定的错误，例如：

errHand:

Select Case Err.Number
    Case -2147012894 'Code for Timeout
        Msgbox "Timeout"
    Case -2147012891 'Code for Invalid URL
        Msgbox "Invalid URL"
    Case Else 'Add more Errorcodes here if wanted
        MsgBox "Errornumber: " & Err.Number & vbnewline & "Errordescription: " & Error(Err.Number)
End select