Regex for Log Files: Extract Fields From Apache, Nginx, and App Logs
Parse structured and semi-structured log files with regex. Extract timestamps, IPs, status codes, and messages from Apache, Nginx, and JSON logs.
Published:
Tags: developer-tools, regex, logging
Regex for Log Files: Extract Fields From Apache, Nginx, and App Logs Log parsing is one of the highest-value regex use cases. Logs are structured text that humans write in ad hoc formats — and regex is exactly the right tool for extracting fields from structured text. This article covers working patterns for Apache, Nginx, JSON logs, timestamps, and custom application logs, plus grep/ripgrep command examples you can run immediately. Nginx Default Log Format Nginx's default format is nearly identical to Apache's, but the field order can vary by configuration. The most common Nginx log format: The same Combined Log pattern works. For Nginx's format which includes additional fields: Pattern for this format: --- Timestamp Extraction Timestamps appear in several formats across different log…
All articles · theproductguy.in