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POAsynchronous HttpRequest using WinHttp.WinHttpRequest.5.1 in ASP
 

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    <p>I was trying to make LINK FINDER and <strong>facing 2 issue</strong></p> <p><em>Issue 1 (Resolved)</em> :: Unable to get url of redirected page</p> <p>This was resolved <a href="https://stackoverflow.com/questions/20358654/serverxmlhttp-request-returing-data-but-not-returning-url-of-final-page-after-30">REFERNCE LINK</a> by using <strong>WinHttp.WinHttpRequest.5.1</strong></p> <p><em>Issue 2 (Unsolved)</em> :: unable to use WinHttp.WinHttpRequest.5.1 object <strong>EVENTS</strong> Or no callback to asynchronous request</p> <p><strong><em>Synchronous request code</em></strong></p> <pre><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 </code></pre> <p>This is working fine but if I have multuple request , then its taking to much time.</p> <p>I have tried following <strong><em>Asynchronous request code</em></strong> but get error </p> <pre><code>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></pre> <p><em>Code 1</em></p> <pre><code>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 </code></pre> <p><strong><em>ERROR - The remote server machine does not exist or is unavailable: 'CreateObject'</em></strong></p> <p><em>Code 2</em></p> <pre><code>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 </code></pre> <p><strong><em>ERROR : Object doesn't support this property or method: 'req.OnResponseFinished</em></strong></p> <p><em>Code 3</em></p> <pre><code>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></pre> <blockquote> <p>In microsoft documentation, they have referred <em>WinHttp.WinHttpRequest.5.1</em> have 4 event. </p> </blockquote> <ol> <li>OnError </li> <li>OnResponseDataAvailable</li> <li>OnResponseFinished</li> <li>OnResponseStart</li> </ol> <p>But i didn't got example of how to use this event, nor i am able to use these event in ASP.</p> <p>Hope for quick response...</p>
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