Colors not rendering in Apache WSGI logs (hashtag1026)

[vikramsubramanian]

I integrated loguru with a django application with this handler.

    dict(
        sink=sys.stderr,
        format="<g>{time:YYYY ddd MMM DD HH:mm:ss.SSSSSSZZ}</g>",
        colorize=True,
        backtrace=False, 
        diagnose=True,  
        catch=True, 
    ),

When I try to use django's inbuilt webserver to serve the application, the colors are shown just fine but for production environment, I use Apache WSGI to serve django application, the logs print fine in apache logs, but the colors are shown as codes instead of the actual color.

\x1b[32m2023 Sun Nov 26 23:44:55.622738+0000\x1b[0m - Apache Logs

![image]( - Django Development Server logs

I tested Apache Logs both on gitbash and command prompt

)

[mayil-ai[bot]]

Possible Solution

• Set colorize=False in the handler configuration to disable ANSI color codes when logs are being written to Apache WSGI logs.
• Ensure that the colorize parameter is set based on the output stream's ability to handle ANSI color codes. Use the should_colorize function from _colorama.py to determine if the output stream supports colorization.
• Modify the add method in _logger.py to conditionally set colorize based on the output stream:

  if colorize is None:
    colorize = _colorama.should_colorize(sink)

• If Apache WSGI does not support color codes, consider using a different logging configuration for production that does not rely on ANSI color codes.

Code snippets to check

loguru → _colorama.py

This snippet contains the logic to determine if the output should be colorized, which is directly related to the issue of colors not rendering properly in Apache WSGI logs. https://github.com/Mayil-AI/loguru/blob/871de74acb2382fb3982d3fb8e224e4a82de9073/loguru/_colorama.py#L1-L67

loguru → _colorizer.py

This snippet contains the logic for substituting color tags with ANSI codes, which is relevant to the issue since the colors are shown as codes instead of the actual color in Apache logs. https://github.com/Mayil-AI/loguru/blob/871de74acb2382fb3982d3fb8e224e4a82de9073/loguru/_colorizer.py#L274-L309 This snippet deals with the colorization of messages and may be relevant to understand how the colorization process is applied to log messages. https://github.com/Mayil-AI/loguru/blob/871de74acb2382fb3982d3fb8e224e4a82de9073/loguru/_colorizer.py#L312-L350 This snippet defines background color codes and may be relevant to the issue if the problem is related to the background color rendering. https://github.com/Mayil-AI/loguru/blob/871de74acb2382fb3982d3fb8e224e4a82de9073/loguru/_colorizer.py#L132-L214

loguru → _better_exceptions.py

This snippet includes default color themes and initialization of colorization settings, which could be relevant to the issue if default settings are affecting the color output in Apache WSGI logs. https://github.com/Mayil-AI/loguru/blob/871de74acb2382fb3982d3fb8e224e4a82de9073/loguru/_better_exceptions.py#L122-L190