HTTP's error pages

One day you may want to replace the standard error pages of your HTTP server with something more original and pretty. That's what this repository was created for :) It contains:

• Simple error pages generator, written on Go
• Single-page error page templates with different designs (located in the templates directory)
• Fast and lightweight HTTP server
• Already generated error pages (sources can be found here, the demonstration is always accessible here)

🔥 Features list

• HTTP server written on Go, with the extremely fast FastHTTP under the hood
  • Respects the Content-Type HTTP header (and X-Format) value and responds with the corresponding format (supported formats is json and xml)
  • Writes logs in json format
  • Contains healthcheck endpoint (/healthz)
  • Contains metrics endpoint (/metrics) in Prometheus format
• Lightweight docker image (~4.3Mb compressed size), distroless and uses the unleveled user by default
• Go-template tags are allowed in the templates
• Ready for integration with Traefik (error pages customization) and Ingress-nginx
• Fully configurable (take a look at the configuration file and project Wiki)
• Distributed using docker image and compiled binary files

🧩 Install

Download the latest binary file for your os/arch from the releases page or use our docker image:

Registry	Image
Docker Hub	tarampampam/error-pages
GitHub Container Registry	ghcr.io/tarampampam/error-pages

Using the latest tag for the docker image is highly discouraged because of possible backward-incompatible changes during major upgrades. Please, use tags in X.Y.Z format

🛠 Usage

Please, take a look at our Wiki for the common usage stories:

• HTTP server (routes, formats, flags and environment variables)
• Pages generator (build your own error page set)
• Static error pages (extract generated static error pages from the docker image)
• Usage with nginx (include our error pages into an image with nginx)
• Usage with Traefik and local Docker Compose (it's a good starting point for the tests)
• Usage with Traefik and Docker Swarm
• Kubernetes & ingress nginx

🦾 Performance

Used hardware:

• Intel® Core™ i7-10510U CPU @ 1.80GHz × 8
• 16 GiB RAM

$ ulimit -aH | grep file
-f: file size (blocks)              unlimited
-c: core file size (blocks)         unlimited
-n: file descriptors                1048576
-x: file locks                      unlimited

$ wrk --version | head -n 1
wrk 4.2.0 [epoll] Copyright (C) 2012 Will Glozer

$ wrk -t12 -c400 -d30s http://127.0.0.1:8080/500.html
Running 30s test @ http://127.0.0.1:8080/500.html
  12 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    50.06ms   61.15ms 655.79ms   85.54%
    Req/Sec     1.07k   363.14     2.40k    69.24%
  383014 requests in 30.08s, 2.14GB read
Requests/sec:  12731.07
Transfer/sec:     72.79MB

FS & memory usage stats during the test

🪂 Templates

Name	Preview
ghost
l7-light
l7-dark
shuffle
noise
hacker-terminal
cats

Note: noise template highly uses the CPU, be careful

🦾 Contributors

I want to say a big thank you to everyone who contributed to this project:

📰 Changes log

Changes log can be found here.

👾 Support

If you find any bugs in the project, please create an issue in the current repository.

📖 License

This is open-sourced software licensed under the MIT License.