在ASP中使用WinHttp.WinHttpRequest.5.1的异步HttpRequest

Question

我试图使LINK FINDER和面临2个问题

问题1(已解决)::无法获取重定向页面的URL

通过使用 WinHttp.WinHttpRequest.5.1 解决了REFERNCE LINK

问题2(未解决)::无法使用WinHttp.WinHttpRequest.5.1对象事件或没有对异步请求的回调

同步请求代码

Set req = CreateObject("WinHttp.WinHttpRequest.5.1")
req.open "GET", url, FALSE
req.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
req.send PostData

这工作正常，但是如果我有多个请求，那么它会花费很多时间。

我已尝试遵循 异​​步请求代码，但收到错误

Set req = CreateObject("WinHttp.WinHttpRequest.5.1")
req.open "GET", url, TRUE
req.OnReadyStateChange = GetRef("req_OnReadyStateChange")
req.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
req.send PostData

Function req_OnReadyStateChange
   ' do something
End Function  

代码1

Set req = CreateObject("WinHttp.WinHttpRequest.5.1","req_")
req.open "GET", url, TRUE
Function req__OnResponseFinished
  ' do something
End Function
req.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
req.send PostData

错误-远程服务器计算机不存在或不可用:'CreateObject'

代码2

Set req = CreateObject("WinHttp.WinHttpRequest.5.1")
req.open "GET", url, TRUE
req.OnResponseFinished = GetRef("req_OnResponseFinished")
Function req_OnResponseFinished
   ' do something
End Function
req.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
req.send PostData

错误:对象不支持此属性或方法:'req.OnResponseFinished

代码3

Set req = CreateObject("WinHttp.WinHttpRequest.5.1")
req.open "GET", url, TRUE
req.OnReadyStateChange = GetRef("req_OnReadyStateChange")
req.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
req.send PostData
 Function req_OnReadyStateChange
   ' do something
End Function

In microsoft documentation, they have referred WinHttp.WinHttpRequest.5.1 have 4 event.

OnError

OnResponseData可用

OnResponse已完成

OnResponseStart

但是我没有如何使用此事件的示例，也无法在ASP中使用这些事件。

希望快速回应...

Answer 1

您是否尝试过使用Sub代替该“req_OnReadyStateChange”函数？

顺便说一句，我正在使用MSXML2.ServerXMLHTTP对象，这工作正常。有什么理由要使用此WinHttp API？

MSXML2.ServerXMLHTTP的示例:

<%
dim url : url = "http://localhost"
dim XmlHttp : set XmlHttp = server.createobject("MSXML2.ServerXMLHTTP")
XmlHttp.onreadystatechange = getRef("doHttpReadyStateChange")
XmlHttp.open "GET", url, true
XmlHttp.send()

sub doHttpReadyStateChange
    response.write XmlHttp.readyState
    response.write "<br>"

    select case XmlHttp.readyState
        case 0  'UNINITIALIZED

        case 1  'LOADING

        case 2  'LOADED

        case 3  'INTERACTIVE

        case 4  'COMPLETED
            response.write "Done"
    end select
end sub
%>