Overview
The article introduces a new feature in the Cloudflare Workers platform that allows developers to view logs and exceptions directly from the dashboard. This feature aims to simplify the logging process, providing insights into application behavior without additional configuration or costs.
What You'll Learn
1
How to view logs and exceptions from the Cloudflare Workers dashboard
2
How to use console.log() for logging in Cloudflare Workers
3
How to apply advanced filters using the wrangler CLI
Key Questions Answered
How can I view logs for my Cloudflare Worker?
You can view logs by navigating to the 'Logs' tab in the Cloudflare Workers dashboard after selecting your Worker. This feature allows you to see a detailed stream of logs and exceptions without any additional configuration.
What types of logs can I see in the Cloudflare Workers dashboard?
The dashboard provides access to console.log outputs, exceptions, and request headers triggered by HTTP requests. Sensitive information like Authorization and Cookie headers is automatically redacted for security.
How do I use advanced filters with the wrangler CLI?
You can use the wrangler tail command with options like --ip-address, --method, and --search to filter logs. This command has been updated to support sampling and is faster than previous versions.
What is the cost of using the new logging feature in Cloudflare Workers?
The logging feature from the dashboard and the wrangler tail command is available at no additional cost for existing Cloudflare Workers customers, making it an accessible tool for developers.
Technologies & Tools
Backend
Cloudflare Workers
Used to run serverless applications and manage logs directly from the dashboard.
Tools
Wrangler
Command-line tool for deploying Workers and managing logs.
Key Actionable Insights
1Start using the Cloudflare Workers dashboard to monitor your application's logs and exceptions easily.This feature allows developers to quickly identify issues in production without the overhead of setting up a separate logging system.
2Utilize console.log() effectively to capture important runtime information.By logging key events and data, developers can gain insights into application behavior and troubleshoot issues more efficiently.
3Leverage the wrangler CLI for advanced log filtering to streamline your debugging process.Using commands like wrangler tail with specific filters can help you focus on relevant logs, improving your development workflow.
Common Pitfalls
1
Neglecting to log important events can lead to difficulties in debugging.
Without sufficient logging, developers may struggle to understand the state of their application in production, making it harder to identify and resolve issues.