The Mysterious Case of MSXML2.ServerXMLHTTP.6.0 Object .send Not Working in IIS Classic ASP

Are you tired of scratching your head, trying to figure out why the MSXML2.ServerXMLHTTP.6.0 object’s .send method is not working in your IIS Classic ASP application? Well, you’re not alone! This frustrating issue has plagued many a developer, leaving them feeling like they’re stuck in a never-ending loop of confusion. But fear not, dear reader, for we’re about to embark on a thrilling adventure to uncover the truth behind this pesky problem.

The Suspects: Understanding the MSXML2.ServerXMLHTTP.6.0 Object

Before we dive into the nitty-gritty of the issue, let’s take a step back and examine the MSXML2.ServerXMLHTTP.6.0 object. This object is a powerful tool used for sending HTTP requests and interacting with web services. It’s a part of the Microsoft XML Core Services (MSXML) library, which provides a set of APIs for parsing, validating, and manipulating XML data.

The .send Method: A Closer Look

The .send method is used to send an HTTP request to a specified URL. It’s a crucial part of the MSXML2.ServerXMLHTTP.6.0 object, allowing you to interact with web services, retrieve data, and perform various other tasks. However, when this method fails to work, it can bring your entire application to a grinding halt.

The Scene of the Crime: IIS Classic ASP and MSXML2.ServerXMLHTTP.6.0 Object

IIS Classic ASP is a popular platform for building web applications, and MSXML2.ServerXMLHTTP.6.0 is often used to send requests to web services or retrieve data from external sources. However, when these two technologies combine, the .send method may refuse to work, leaving developers scratching their heads.

Symptoms of the Issue

If you’re experiencing this issue, you may encounter the following symptoms:

• The .send method fails to send the HTTP request, resulting in a timeout or error.
• The MSXML2.ServerXMLHTTP.6.0 object is correctly instantiated, but the request is not being sent.
• Other ASP pages or applications on the same server are functioning correctly, but this specific page or application is affected.

The Investigation: Troubleshooting the Issue

Now that we’ve set the stage, it’s time to start investigating the issue. Let’s follow a logical approach to identify the root cause of the problem.

Check the Obvious: MSXML2.ServerXMLHTTP.6.0 Object Instantiation

Ensure that the MSXML2.ServerXMLHTTP.6.0 object is correctly instantiated using the following code:

  
    Dim xmlhttp
    Set xmlhttp = Server.CreateObject("MSXML2.ServerXMLHTTP.6.0")
  

If the object is not instantiated correctly, the .send method will not work.

Verify the URL and Request Details

Double-check the URL and request details, ensuring that they are correct and properly formatted:

  
    xmlhttp.open "GET", "https://example.com/service", False
    xmlhttp.setRequestHeader "Content-Type", "application/xml"
  

A single mistake in the URL or request details can cause the .send method to fail.

Check IIS Settings and Configuration

Verify that the IIS settings and configuration are correct, including:

• ISAPI filters: Ensure that the ASP ISAPI filter is enabled and configured correctly.
• Application Pool: Verify that the application pool is set to use the correct .NET framework version.
• Authentication: Check that authentication is set up correctly, including anonymous access or Windows authentication.

Debugging and Error Handling

Implement robust debugging and error handling mechanisms to capture and log errors, allowing you to identify the root cause of the issue:

  
    On Error Resume Next
    xmlhttp.send
    If Err.Number <> 0 Then
        Response.Write "Error: " & Err.Description
        Response.End
    End If
  

The Verdict: Causes and Solutions

After thorough investigation, we’ve uncovered the most common causes of the MSXML2.ServerXMLHTTP.6.0 object .send method not working in IIS Classic ASP:

Cause 1: Incorrect MSXML2.ServerXMLHTTP.6.0 Object Instantiation

Solution: Ensure that the MSXML2.ServerXMLHTTP.6.0 object is correctly instantiated using the code provided earlier.

Cause 2: URL or Request Details Errors

Solution: Verify that the URL and request details are correct and properly formatted.

Cause 3: IIS Settings and Configuration Issues

Solution: Check and verify the IIS settings and configuration, including ISAPI filters, application pool, and authentication.

Cause 4: MSXML2.ServerXMLHTTP.6.0 Object Configuration Issues

Solution: Ensure that the MSXML2.ServerXMLHTTP.6.0 object is configured correctly, including setting the timeout, proxy, and other properties as required.

Cause 5: Server-Side Firewall or Proxy Issues

Solution: Check for server-side firewall or proxy issues that may be blocking the HTTP request.

The Conclusion: Wrapping Up the Investigation

We’ve navigated the twists and turns of the MSXML2.ServerXMLHTTP.6.0 object .send method not working in IIS Classic ASP, and uncovered the common causes and solutions. By following this comprehensive guide, you should be able to identify and resolve the issue, getting your application back on track.

Cause	Solution
Incorrect MSXML2.ServerXMLHTTP.6.0 Object Instantiation	Ensure correct object instantiation
URL or Request Details Errors	Verify correct URL and request details
IIS Settings and Configuration Issues	Check and verify IIS settings and configuration
MSXML2.ServerXMLHTTP.6.0 Object Configuration Issues	Ensure correct MSXML2.ServerXMLHTTP.6.0 object configuration
Server-Side Firewall or Proxy Issues	Check for server-side firewall or proxy issues

By implementing these solutions, you’ll be able to overcome the frustrations of the MSXML2.ServerXMLHTTP.6.0 object .send method not working in IIS Classic ASP. Remember, a logical and methodical approach to troubleshooting is key to resolving this issue.

So, the next time you encounter this problem, don’t panic! Simply follow the steps outlined in this article, and you’ll be well on your way to resolving the issue and getting your application up and running smoothly.

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