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Add Error Handling to a Flask CMS

In this code lab, you’ll utilize logging, signals, and error handlers to make an existing content management system more resilient.

Lab platform
Lab Info
Level
Intermediate
Last updated
Sep 30, 2025
Duration
1h 3m

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Table of Contents
  1. Challenge

    Access Log

    Overview

    Python & Flask are great for building a web applications. In this lab, you’ll utilize logging, signals and error handlers to make an existing content management system more resilient.

    In this module we'll create a function to configure logging. The function creates and configures a rotating file handler. This function will then be used to configure an access log. Then, using an after request decorator we'll write all requests to this access log. ### Solution The solution can be found in the solution directory.

  2. Challenge

    Error Log

    In this module we'll handle 404 and 500 errors. When these errors happen the user will be redirected to the appropriate template. The 500 errors will also be logged to an error log.

  3. Challenge

    Unauthorized Log

    In this module we'll create a signal that writes unauthorized login attempts to a log file.

About the author

Tom is a staff author at Pluralsight helping to develop Hands-On content. Tom's background in software development, UI/UX, and instructional design was developed over the years while working as a faculty member at the School of Computing at Weber State University in Utah, and continues to grow as he develops Projects and Labs for Pluralsight. When he's not creating content to allow learners to gain real-life experience, he enjoys spending time with his family.

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