Python FastCGI under IIS stdout writing problems

FastCGI (Fast Common Gateway Interface) is a protocol for interfacing external applications with web servers. It allows you to run Python applications on a web server like Internet Information Services (IIS) more efficiently compared to traditional CGI. However, working with FastCGI under IIS can sometimes present challenges when it comes to writing output to the standard output (stdout). This tutorial will guide you through the process of setting up Python FastCGI on IIS and address common stdout writing issues.
Before you begin, make sure you have the following prerequisites:
Open the IIS Manager on your Windows server.
Create a new website or select an existing one where you want to run your Python FastCGI application.
In the right-hand pane, click on "Handler Mappings."
In the Actions pane on the right, click "Add Module Mapping..."
Configure the module mapping as follows:
Click OK to save the module mapping.
Back in the IIS Manager, select your website, and open the "FastCGI Settings" feature.
Click "Edit Feature Settings..." on the right-hand side.
Set the following options:
Click OK to save the FastCGI settings.
When running Python FastCGI under IIS, you may encounter issues with stdout output not being displayed as expected. To address this, follow these steps:
Ensure that the stdout buffer is flushed for all your FastCGI scripts that generate output.
To apply the changes, restart your IIS web application pool or IIS itself.
Test your FastCGI script in a web browser. You should now see the expected output without buffering delays.
In this tutorial, you learned how to set up Python FastCGI under IIS and address stdout writing problems that can occur when running FastCGI applications on Windows. By flushing the stdout buffer and configuring FastCGI settings correctly, you can ensure that your Python FastCGI scripts work smoothly with IIS.
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