Getting Real Client IPs in Fiber Behind a Proxy

When your Fiber application runs behind a reverse proxy like Caddy, Nginx, or Cloudflare, you’ll notice that c.IP() returns the proxy’s IP address instead of your actual visitor’s IP. This happens because Fiber sees the direct connection, which is from the proxy server, not the original client.

Why This Happens

By default, Fiber reads the IP from the direct TCP connection for security reasons. Without proper configuration, it doesn’t know there’s a trusted proxy in front of it passing along the real client information in HTTP headers.

Level Up Your Go Web Server: Mastering Advanced Routing with net/http

Building robust and maintainable web applications in Go often hinges on how effectively you manage incoming HTTP requests. While Go’s built-in net/http package provides foundational tools, its advanced routing features empower you to create sophisticated and organized application logic. This article will guide you through practical code examples for path parameters, HTTP method constraints, host-based routing, middleware, sub-routing, and context-elevating your Go web server development.

Quick and Free Way to Share Your Local Docker Service with Clients

Ever been in that situation where you’ve built something cool in Docker and want to quickly show it to your client? Yeah, me too. Recently, I was wrapping up a database admin panel project and needed a way to let my client review it before the final deployment.

My go-to solution used to be Ngrok. It works, but the free tier gives you random URLs that look like 8f4d-192-158-1-38.ngrok.io. Not very professional when sending to clients, right? Plus, these URLs change every time you restart the tunnel.

I’d like to share Readability , a tool I’ve developed and refined over time. Its primary focus has always been straightforward: find the most prominent image on any webpage while keeping the overhead minimal.

Core Focus: Image Detection

The main strength of Readability lies in its image detection capabilities. While many similar tools try to do everything, I focused on solving one specific problem really well: finding the most prominent image on a page through dimensional analysis. The approach is simple yet effective:

Introduction

When deploying applications on AWS App Runner, you may need to access S3 buckets to store or retrieve data. However, by default, App Runner services don’t have permission to interact with S3. This guide aims to solve that problem by walking you through the process of granting your App Runner service secure access to S3 buckets.

We’ll achieve this by:

1. Creating an IAM role with the necessary S3 permissions
2. Configuring your App Runner service to use this role
3. Setting up networking components (if using a VPC) to ensure connectivity

By following these steps, you’ll enable your App Runner service to securely read from and write to S3 buckets, allowing for seamless integration of S3 storage in your application.