异步的Htt prequest在ASP中使用WinHttp.WinHtt prequest.5.1 [英] Asynchronous HttpRequest using WinHttp.WinHttpRequest.5.1 in ASP

问题描述

我试图让LINK FINDER和 2面临的问题

问题1（解决）的::无法获取重定向页面的网址

这是解决<一个href=\"http://stackoverflow.com/questions/20358654/serverxmlhttp-request-returing-data-but-not-returning-url-of-final-page-after-30\">REFERNCE通过使用LINK WinHttp.WinHtt prequest.5.1

问题2（未解）的::无法使用WinHttp.WinHtt prequest.5.1对象的活动或无回调异步请求

同步请求code 的

 设置REQ =的CreateObject（WinHttp.WinHtt prequest.5.1）
req.openGET，网址，FALSE
req.setRequestHeader内容类型，应用程序/ x-WWW的形式urlen codeD
req.send的PostData
 

这是工作正常，但如果我有multuple要求，那么其抽空多的时间。

我曾尝试下面的的异步请求code 的，但得到的错误

 设置REQ =的CreateObject（WinHttp.WinHtt prequest.5.1）
req.openGET，网址，TRUE
req.OnReadyStateChange = GetRef（req_OnReadyStateChange）
req.setRequestHeader内容类型，应用程序/ x-WWW的形式urlen codeD
req.send的PostData功能req_OnReadyStateChange
   ' 做一点事
结束功能
 

的 code 1 的

 设置REQ =的CreateObject（WinHttp.WinHtt prequest.5.1，req_）
req.openGET，网址，TRUE
功能req__OnResponseFinished
  ' 做一点事
结束功能
req.setRequestHeader内容类型，应用程序/ x-WWW的形式urlen codeD
req.send的PostData
 

错误 - 远程服务器计算机不存在或不可用：'的CreateObject的

的 code 2 的

 设置REQ =的CreateObject（WinHttp.WinHtt prequest.5.1）
req.openGET，网址，TRUE
req.OnResponseFinished = GetRef（req_OnResponseFinished）
功能req_OnResponseFinished
   ' 做一点事
结束功能
req.setRequestHeader内容类型，应用程序/ x-WWW的形式urlen codeD
req.send的PostData
 

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

的 code 3 的

 设置REQ =的CreateObject（WinHttp.WinHtt prequest.5.1）
req.openGET，网址，TRUE
req.OnReadyStateChange = GetRef（req_OnReadyStateChange）
req.setRequestHeader内容类型，应用程序/ x-WWW的形式urlen codeD
req.send的PostData
 功能req_OnReadyStateChange
   ' 做一点事
结束功能
 

  

在微软的文档，他们被称为
  的 WinHttp.WinHtt prequest.5.1 的有4个事件。

1. 的OnError


2. OnResponseDataAvailable


3. OnResponseFinished


4. OnResponseStart

但我没有得到的例子如何使用此事件，也不是我能够在ASP中使用这些事件。

希望快速响应...

解决方案

你尝试过用子，而不是一个函数，该函数req_OnReadyStateChange？

这是我使用的MSXML2.ServerXMLHTTP对象，这是工作的罚款的方式。没有任何理由，你为什么使用这个API的WinHTTP？

例如与MSXML2.ServerXMLHTTP：

 ＆LT;％
昏暗的URL：URL =HTTP：// localhost的
昏暗为XmlHttp：设置为XmlHttp =的Server.CreateObject（MSXML2.ServerXMLHTTP）
XmlHttp.onreadystatechange = getRef（doHtt preadyStateChange）
XmlHttp.openGET，网址，真实
XmlHttp.send（）子doHtt preadyStateChange
    回复于XmlHttp.readyState
    RESPONSE.WRITE＆LT; BR＆gt;中    选择的情况下XmlHttp.readyState
        案例0UNINITIALIZED        案例1LOADING        案例2'受压        案例3互动        案例4竣工
            的Response.Write完成
    最终选择
分结束
％GT;
 

I was trying to make LINK FINDER and facing 2 issue

Issue 1 (Resolved) :: Unable to get url of redirected page

This was resolved REFERNCE LINK by using WinHttp.WinHttpRequest.5.1

Issue 2 (Unsolved) :: unable to use WinHttp.WinHttpRequest.5.1 object EVENTS Or no callback to asynchronous request

Synchronous request code

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

This is working fine but if I have multuple request , then its taking to much time.

I have tried following Asynchronous request code but get error

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  

Code 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

ERROR - The remote server machine does not exist or is unavailable: 'CreateObject'

Code 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

ERROR : Object doesn't support this property or method: 'req.OnResponseFinished

Code 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.

1. OnError
2. OnResponseDataAvailable
3. OnResponseFinished
4. OnResponseStart

But i didn't got example of how to use this event, nor i am able to use these event in ASP.

Hope for quick response...

解决方案

have you tried using a Sub instead of a function for that "req_OnReadyStateChange"?

by the way i am using the MSXML2.ServerXMLHTTP object and this is working fine. is there any reason why you are using this WinHttp API?

example with MSXML2.ServerXMLHTTP:

<%
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
%>

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