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<p align="center">
<a href="https://github.com/tarampampam/error-pages#readme">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://socialify.git.ci/tarampampam/error-pages/image?description=1&font=Raleway&forks=1&issues=1&logo=https%3A%2F%2Fhsto.org%2Fwebt%2Frm%2F9y%2Fww%2Frm9ywwx3gjv9agwkcmllhsuyo7k.png&owner=1&pulls=1&pattern=Solid&stargazers=1&theme=Dark">
<img align="center" src="https://socialify.git.ci/tarampampam/error-pages/image?description=1&font=Raleway&forks=1&issues=1&logo=https%3A%2F%2Fhsto.org%2Fwebt%2Frm%2F9y%2Fww%2Frm9ywwx3gjv9agwkcmllhsuyo7k.png&owner=1&pulls=1&pattern=Solid&stargazers=1&theme=Light">
</picture>
</a>
</p>
<p align="center">
<a href="#"><img src="https://img.shields.io/github/go-mod/go-version/tarampampam/error-pages?longCache=true&label=&logo=go&logoColor=white&style=flat-square" alt="" /></a>
<a href="https://github.com/tarampampam/error-pages/actions"><img src="https://img.shields.io/github/actions/workflow/status/tarampampam/error-pages/tests.yml?branch=master&maxAge=30&label=tests&logo=github&style=flat-square" alt="" /></a>
<a href="https://github.com/tarampampam/error-pages/actions"><img src="https://img.shields.io/github/actions/workflow/status/tarampampam/error-pages/release.yml?maxAge=30&label=release&logo=github&style=flat-square" alt="" /></a>
<a href="https://hub.docker.com/r/tarampampam/error-pages"><img src="https://img.shields.io/docker/pulls/tarampampam/error-pages.svg?maxAge=30&label=pulls&logo=docker&logoColor=white&style=flat-square" alt="" /></a>
<a href="https://hub.docker.com/r/tarampampam/error-pages"><img src="https://img.shields.io/docker/image-size/tarampampam/error-pages/latest?maxAge=30&label=size&logo=docker&logoColor=white&style=flat-square" alt="" /></a>
<a href="https://github.com/tarampampam/error-pages/blob/master/LICENSE"><img src="https://img.shields.io/github/license/tarampampam/error-pages.svg?maxAge=30&style=flat-square" alt="" /></a>
</p>
One day, you might want to replace the standard error pages of your HTTP server or K8S cluster with something more
original and attractive. That's why this repository was created :) It contains:
- A simple error page generator written in Go
- Single-page error templates (themes) with various designs (located in the [templates][templates-dir] directory) that
you can customize as you wish
- A fast and lightweight HTTP server is available as a single binary file and Docker image. It includes built-in error
page templates from this repository. You don't need anything except the compiled binary file or Docker image
- Pre-generated error pages (sources can be [found here][preview-sources], and the [**demo** is always
accessible here][preview-demo])
[preview-sources]:https://github.com/tarampampam/error-pages/tree/gh-pages
[preview-demo]:https://tarampampam.github.io/error-pages/
[templates-dir]:https://github.com/tarampampam/error-pages/tree/master/templates
## 🔥 Features List
- HTTP server written in Go, utilizing the extremely fast [FastHTTP][fasthttp] and in-memory caching
- Respects the `Content-Type` HTTP header (and `X-Format`) value, responding with the corresponding format
(supported formats: `json`, `xml`, and `plaintext`)
- Error pages are configured to be excluded from search engine indexing (using meta tags and HTTP headers) to
prevent SEO issues on your website
- HTML content (including CSS, SVG, and JS) is minified on the fly
- Logs written in `json` format
- Contains a health check endpoint (`/healthz`)
- Consumes very few resources and is suitable for use in resource-constrained environments
- Lightweight Docker image, distroless, and uses an unprivileged user by default
- [Go-template](https://pkg.go.dev/text/template) tags are allowed in the templates
- Ready for integration with [Traefik][traefik], [Ingress-nginx][ingress-nginx], and more
- Error pages can be embedded into your own Docker image with `nginx` in a few simple steps
- Fully configurable
- Distributed as a Docker image and compiled binary files
- Localized HTML error pages (🇺🇸, 🇫🇷, 🇺🇦, 🇷🇺, 🇵🇹, 🇳🇱, 🇩🇪, 🇪🇸, 🇨🇳, 🇮🇩, 🇵🇱, 🇰🇷) - translation process
[described here][l10n-dir] - other translations are welcome!
[fasthttp]:https://github.com/valyala/fasthttp
[traefik]:https://github.com/traefik/traefik
[l10n-dir]:https://github.com/tarampampam/error-pages/tree/master/l10n
## 🧩 Install
Download the latest binary file for your OS/architecture from the [releases page][latest-release] or use our Docker image:
| Registry | Image |
|-----------------------------------|-----------------------------------|
| [GitHub Container Registry][ghcr] | `ghcr.io/tarampampam/error-pages` |
| [Docker Hub][docker-hub] (mirror) | `tarampampam/error-pages` |
> [!IMPORTANT]
> Using the `latest` tag for the Docker image is highly discouraged due to potential backward-incompatible changes
> during **major** upgrades. Please use tags in the `X.Y.Z` format.
💣 **Or** you can also download the **already rendered** error pages pack as a [zip][pages-pack-zip] or
[tar.gz][pages-pack-tar-gz] archive.
[latest-release]:https://github.com/tarampampam/error-pages/releases/latest
[docker-hub]:https://hub.docker.com/r/tarampampam/error-pages
[ghcr]:https://github.com/tarampampam/error-pages/pkgs/container/error-pages
[pages-pack-zip]:https://github.com/tarampampam/error-pages/zipball/gh-pages/
[pages-pack-tar-gz]:https://github.com/tarampampam/error-pages/tarball/gh-pages/
## 🪂 Templates (themes)
The following templates are built-in and available for use without any additional setup:
> [!NOTE]
> The `cats` template is the only one of those that fetches resources (the actual cat pictures) from external
> servers - all other templates are self-contained.
<table>
<thead>
<tr>
<th>Template</th>
<th>Preview</th>
</tr>
</thead>
<tbody>
<tr>
<td align="center">
<code>app-down</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Fapp-down.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/app-down/404.html">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://github.com/tarampampam/error-pages/assets/7326800/4e668a56-a4c4-47cd-ac4d-b6b45db54ab8">
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/ad4b4fd7-7c7b-4bdc-a6b6-44f9ba7f77ca">
</picture>
</a>
</td>
</tr>
<tr>
<td align="center">
<code>cats</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Fcats.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/cats/404.html">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://github.com/tarampampam/error-pages/assets/7326800/5689880b-f770-406c-81dd-2d28629e6f2e">
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/056cd00e-bc9a-4120-8325-310d7b0ebd1b">
</picture>
</a>
</td>
</tr>
<tr>
<td align="center">
<code>connection</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Fconnection.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/connection/404.html">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://github.com/tarampampam/error-pages/assets/7326800/3f03dc1b-c1ee-4a91-b3d7-e3b93c79020e">
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/099ecc2d-e724-4d9c-b5ed-66ddabd71139">
</picture>
</a>
</td>
</tr>
<tr>
<td align="center">
<code>ghost</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Fghost.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/ghost/404.html">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://github.com/tarampampam/error-pages/assets/7326800/714482ab-f8c1-4455-8ae8-b2ae78f7a2c6">
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/f253dfe7-96a0-4e96-915b-d4c544d4a237">
</picture>
</a>
</td>
</tr>
<tr>
<td align="center">
<code>hacker-terminal</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Fhacker-terminal.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/hacker-terminal/404.html">
<picture>
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/c197fc35-0844-43d0-9830-82440cee4559">
</picture>
</a>
</td>
</tr>
<tr>
<td align="center">
<code>l7</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Fl7.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/l7/404.html">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://github.com/tarampampam/error-pages/assets/7326800/18e43ea3-6389-4459-be41-0fc6566a073f">
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/05f26669-94ec-40ce-8d67-a199cde54202">
</picture>
</a>
</td>
</tr>
<tr>
<td align="center">
<code>lost-in-space</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Flost-in-space.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/lost-in-space/404.html">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://github.com/tarampampam/error-pages/assets/7326800/debf87c0-6f27-41a8-b141-ee3464cbd6cc">
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/c347e63d-13a7-46d4-81b9-b25266819a1d">
</picture>
</a>
</td>
</tr>
<tr>
<td align="center">
<code>noise</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Fnoise.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/noise/404.html">
<picture>
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/4cc5c3bd-6ebb-4e96-bee8-02d4ad4e7266">
</picture>
</a>
</td>
</tr>
<tr>
<td align="center">
<code>orient</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Forient.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/orient/404.html">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://github.com/tarampampam/error-pages/assets/7326800/bc2b0dad-c32c-4628-98f6-e3eab61dd1f2">
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/8fc0a7ea-694d-49ce-bb50-3ea032d52d1e">
</picture>
</a>
</td>
</tr>
<tr>
<td align="center">
<code>shuffle</code><br/><br/>
<picture>
<img src="https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Ferror-pages.goatcounter.com%2Fcounter%2F%2Fuse-template%2Fshuffle.json&query=%24.count&label=used%20times" alt="used times">
</picture>
</td>
<td>
<a href="https://tarampampam.github.io/error-pages/shuffle/404.html">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://github.com/tarampampam/error-pages/assets/7326800/7504b7c3-b0cb-4991-9ac2-759cd6c50fc0">
<img align="center" src="https://github.com/tarampampam/error-pages/assets/7326800/d2a73fc8-cf5f-4f42-bff8-cce33d8ae47e">
</picture>
</a>
</td>
</tr>
</tbody>
</table>
> [!NOTE]
> The "used times" counter increments when someone start the server with the specified template. Stats service does
> not collect any information about location, IP addresses, and so on. Moreover, the stats are open and available for
> everyone at [error-pages.goatcounter.com](https://error-pages.goatcounter.com/). This is simply a counter to display
> how often a particular template is used, nothing more.
## 🛠 Usage scenarios
### HTTP server starting, utilizing either a binary file or Docker image
First, ensure you have a precompiled binary file on your machine or have Docker/Podman installed. Next, start the
server with the following command:
```bash
$ ./error-pages serve
# --- or ---
$ docker run --rm -p '8080:8080/tcp' tarampampam/error-pages serve
```
That's it! The server will begin running and listen on address `0.0.0.0` and port `8080`. Access error pages using
URLs like `http://127.0.0.1:8080/{page_code}.html`.
To retrieve different error page codes using a static URL, use the `X-Code` HTTP header:
```bash
$ curl -H 'X-Code: 500' http://127.0.0.1:8080/
```
The server respects the `Content-Type` HTTP header (and `X-Format`), delivering responses in requested formats
such as HTML, XML, JSON, and PlainText. Customization of these formats is possible via CLI flags or environment
variables.
For integration with [ingress-nginx][ingress-nginx] or debugging purposes, start the server with `--show-details`
(or set the environment variable `SHOW_DETAILS=true`) to enrich error pages (including JSON and XML responses)
with upstream proxy information.
Switch themes using the `TEMPLATE_NAME` environment variable or the `--template-name` flag; available templates
are detailed in the readme file below.
> [!TIP]
> Use the `--rotation-mode` flag or the `TEMPLATES_ROTATION_MODE` environment variable to automate theme
> rotation. Available modes include `random-on-startup`, `random-on-each-request`, `random-hourly`,
> and `random-daily`.
To proxy HTTP headers from requests to responses, utilize the `--proxy-headers` flag or environment variable
(comma-separated list of headers).
<details>
<summary><strong>🚀 Start the HTTP server with my custom template (theme)</strong></summary>
First, create your own template file, for example `my-super-theme.html`:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<title>{{ code }}</title>
</head>
<body>
<h1>YEAH! {{ message }}: {{ description }}</h1>
</body>
</html>
```
And simply start the server with the following command:
```bash
$ docker run --rm \
-v "$(pwd)/my-super-theme.html:/opt/my-template.html:ro" \
-p '8080:8080/tcp' ghcr.io/tarampampam/error-pages:3 serve \
--add-template /opt/my-template.html \
--template-name my-template
# --- or ---
$ ./error-pages serve \
--add-template /opt/my-template.html \
--template-name my-template
```
And test it:
```bash
$ curl -H "Accept: text/html" http://127.0.0.1:8080/503
<!DOCTYPE html>
<html lang="en">
<head>
<title>503</title>
</head>
<body>
<h1>YEAH! Service Unavailable: The server is temporarily overloading or down</h1>
</body>
</html>
```
</details>
<details>
<summary><strong>🚀 Generate a set of error pages using built-in or my own template</strong></summary>
Generating a set of error pages is straightforward. If you prefer to use your own template, start by crafting it.
Create a file like this:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<title>{{ code }}</title>
</head>
<body>
<h1>{{ message }}: {{ description }}</h1>
</body>
</html>
```
Save it as `my-template.html` and use it as your custom template. Then, generate your error pages using the command:
```bash
$ mkdir -p /path/to/output
$ ./error-pages build --add-template /path/to/your/my-template.html --target-dir /path/to/output
```
This will create error pages based on your template in the specified output directory:
```bash
$ cd /path/to/output && tree .
├── my-template
│ ├── 400.html
│ ├── 401.html
│ ├── 403.html
│ ├── 404.html
│ ├── 405.html
│ ├── 407.html
│ ├── 408.html
│ ├── 409.html
│ ├── 410.html
│ ├── 411.html
│ ├── 412.html
│ ├── 413.html
│ ├── 416.html
│ ├── 418.html
│ ├── 429.html
│ ├── 500.html
│ ├── 502.html
│ ├── 503.html
│ ├── 504.html
│ └── 505.html
…
$ cat my-template/403.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>403</title>
</head>
<body>
<h1>Forbidden: Access is forbidden to the requested page</h1>
</body>
</html>
```
</details>
<details>
<summary><strong>🚀 Customize error pages within your own Nginx Docker image</strong></summary>
To create this cocktail, we need two components:
- Nginx configuration file
- A Dockerfile to build the image
Let's start with the Nginx configuration file:
```nginx
# File: nginx.conf
server {
listen 80;
server_name localhost;
error_page 401 /_error-pages/401.html;
error_page 403 /_error-pages/403.html;
error_page 404 /_error-pages/404.html;
error_page 500 /_error-pages/500.html;
error_page 502 /_error-pages/502.html;
error_page 503 /_error-pages/503.html;
location ^~ /_error-pages/ {
internal;
root /usr/share/nginx/errorpages;
}
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
}
```
And the Dockerfile:
```dockerfile
FROM docker.io/library/nginx:1.27-alpine
# override default Nginx configuration
COPY --chown=nginx ./nginx.conf /etc/nginx/conf.d/default.conf
# copy statically built error pages from the error-pages image
# (instead of `ghost` you may use any other template)
COPY --chown=nginx \
--from=ghcr.io/tarampampam/error-pages:3 \
/opt/html/ghost /usr/share/nginx/errorpages/_error-pages
```
Now, we can build the image:
```bash
$ docker build --tag your-nginx:local -f ./Dockerfile .
```
And voilà! Let's start the image and test if everything is working as expected:
```bash
$ docker run --rm -p '8081:80/tcp' your-nginx:local
$ curl http://127.0.0.1:8081/foobar | head -n 15 # in another terminal
```
</details>
<details>
<summary><strong>🚀 Usage with Traefik and local Docker Compose</strong></summary>
Instead of thousands of words, let's take a look at one compose file:
```yaml
# file: compose.yml (or docker-compose.yml)
services:
traefik:
image: docker.io/library/traefik:v3.1
command:
#- --log.level=DEBUG
- --api.dashboard=true # activate dashboard
- --api.insecure=true # enable the API in insecure mode
- --providers.docker=true # enable Docker backend with default settings
- --providers.docker.exposedbydefault=false # do not expose containers by default
- --entrypoints.web.address=:80 # --entrypoints.<name>.address for ports, 80 (i.e., name = web)
ports:
- "80:80/tcp" # HTTP (web)
volumes:
- /var/run/docker.sock:/var/run/docker.sock:ro
labels:
traefik.enable: true
# dashboard
traefik.http.routers.traefik.rule: Host(`traefik.localtest.me`)
traefik.http.routers.traefik.service: api@internal
traefik.http.routers.traefik.entrypoints: web
traefik.http.routers.traefik.middlewares: error-pages-middleware
depends_on:
error-pages: {condition: service_healthy}
error-pages:
image: ghcr.io/tarampampam/error-pages:3 # using the latest tag is highly discouraged
environment:
TEMPLATE_NAME: l7 # set the error pages template
labels:
traefik.enable: true
# use as "fallback" for any NON-registered services (with priority below normal)
traefik.http.routers.error-pages-router.rule: HostRegexp(`.+`)
traefik.http.routers.error-pages-router.priority: 10
# should say that all of your services work on https
traefik.http.routers.error-pages-router.entrypoints: web
traefik.http.routers.error-pages-router.middlewares: error-pages-middleware
# "errors" middleware settings
traefik.http.middlewares.error-pages-middleware.errors.status: 400-599
traefik.http.middlewares.error-pages-middleware.errors.service: error-pages-service
traefik.http.middlewares.error-pages-middleware.errors.query: /{status}.html
# define service properties
traefik.http.services.error-pages-service.loadbalancer.server.port: 8080
nginx-or-any-another-service:
image: docker.io/library/nginx:1.27-alpine
labels:
traefik.enable: true
traefik.http.routers.test-service.rule: Host(`test.localtest.me`)
traefik.http.routers.test-service.entrypoints: web
traefik.http.routers.test-service.middlewares: error-pages-middleware
```
After executing `docker compose up` in the same directory as the `compose.yml` file, you can:
- Open the Traefik dashboard [at `traefik.localtest.me`](http://traefik.localtest.me/dashboard/#/)
- [View customized error pages on the Traefik dashboard](http://traefik.localtest.me/foobar404)
- Open the nginx index page [at `test.localtest.me`](http://test.localtest.me/)
- View customized error pages for non-existent [pages](http://test.localtest.me/404) and [domains](http://404.localtest.me/)
Isn't this kind of magic? 😀
</details>
<details>
<summary><strong>🚀 Kubernetes (K8s) & Ingress Nginx</strong></summary>
Error-pages can be configured to work with the [ingress-nginx][ingress-nginx] helm chart in Kubernetes.
- Set the `custom-http-errors` config value
- Enable default backend
- Set the default backend image
```yaml
controller:
config:
custom-http-errors: >-
401,403,404,500,501,502,503
defaultBackend:
enabled: true
image:
repository: ghcr.io/tarampampam/error-pages
tag: '3' # using the latest tag is highly discouraged
extraEnvs:
- name: TEMPLATE_NAME # Optional: change the default theme
value: l7
- name: SHOW_DETAILS # Optional: enables the output of additional information on error pages
value: 'true'
```
</details>
## 🦾 Performance
Hardware used:
- 12th Gen Intel® Core™ i7-1260P (16 cores)
- 32 GiB RAM
RPS: **~180k** 🔥 requests served without any errors, with peak memory usage ~60 MiB under the default configuration
<details>
<summary>Performance test details (click to expand)</summary>
```shell
$ ulimit -aH | grep file
core file size (blocks, -c) unlimited
file size (blocks, -f) unlimited
open files (-n) 1048576
file locks (-x) unlimited
$ go build ./cmd/error-pages/ && ./error-pages --log-level warn serve
$ ./error-pages perftest # in separate terminal
Starting the test to bomb ONE PAGE (code). Please, be patient...
Test completed successfully. Here is the output:
Running 15s test @ http://127.0.0.1:8080/
12 threads and 400 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 4.52ms 6.43ms 94.34ms 85.44%
Req/Sec 15.76k 2.83k 29.64k 69.20%
2839632 requests in 15.09s, 32.90GB read
Requests/sec: 188185.61
Transfer/sec: 2.18GB
Starting the test to bomb DIFFERENT PAGES (codes). Please, be patient...
Test completed successfully. Here is the output:
Running 15s test @ http://127.0.0.1:8080/
12 threads and 400 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 6.75ms 13.71ms 252.66ms 91.94%
Req/Sec 14.06k 3.25k 26.39k 71.98%
2534473 requests in 15.10s, 29.22GB read
Requests/sec: 167899.78
Transfer/sec: 1.94GB
```
</details>
<!--GENERATED:CLI_DOCS-->
<!-- Documentation inside this block generated by github.com/urfave/cli; DO NOT EDIT -->
## CLI interface
Usage:
```bash
$ error-pages [GLOBAL FLAGS] [COMMAND] [COMMAND FLAGS] [ARGUMENTS...]
```
Global flags:
| Name | Description | Default value | Environment variables |
|--------------------|---------------------------------------|:-------------:|:---------------------:|
| `--log-level="…"` | Logging level (debug/info/warn/error) | `info` | `LOG_LEVEL` |
| `--log-format="…"` | Logging format (console/json) | `console` | `LOG_FORMAT` |
### `serve` command (aliases: `s`, `server`, `http`)
Please start the HTTP server to serve the error pages. You can configure various options - please RTFM :D.
Usage:
```bash
$ error-pages [GLOBAL FLAGS] serve [COMMAND FLAGS] [ARGUMENTS...]
```
The following flags are supported:
| Name | Description | Default value | Environment variables |
|------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:-----------------------------------------:|:---------------------------:|
| `--listen="…"` (`-l`) | The HTTP server will listen on this IP (v4 or v6) address (set 127.0.0.1/::1 for localhost, 0.0.0.0 to listen on all interfaces, or specify a custom IP) | `0.0.0.0` | `LISTEN_ADDR` |
| `--port="…"` (`-p`) | The TCP port number for the HTTP server to listen on (0-65535) | `8080` | `LISTEN_PORT` |
| `--add-template="…"` | To add a new template, provide the path to the file using this flag (the filename without the extension will be used as the template name) | `[]` | `ADD_TEMPLATE` |
| `--disable-template="…"` | Disable the specified template by its name (useful to disable the built-in templates and use only custom ones) | `[]` | *none* |
| `--add-code="…"` | To add a new HTTP status code, provide the code and its message/description using this flag (the format should be '%code%=%message%/%description%'; the code may contain a wildcard '*' to cover multiple codes at once, for example, '4**' will cover all 4xx codes unless a more specific code is described previously) | `map[]` | *none* |
| `--json-format="…"` | Override the default error page response in JSON format (Go templates are supported; the error page will use this template if the client requests JSON content type) | | `RESPONSE_JSON_FORMAT` |
| `--xml-format="…"` | Override the default error page response in XML format (Go templates are supported; the error page will use this template if the client requests XML content type) | | `RESPONSE_XML_FORMAT` |
| `--plaintext-format="…"` | Override the default error page response in plain text format (Go templates are supported; the error page will use this template if the client requests plain text content type or does not specify any) | | `RESPONSE_PLAINTEXT_FORMAT` |
| `--template-name="…"` (`-t`) | Name of the template to use for rendering error pages (built-in templates: app-down, cats, connection, ghost, hacker-terminal, l7, lost-in-space, noise, orient, shuffle) | `app-down` | `TEMPLATE_NAME` |
| `--disable-l10n` | Disable localization of error pages (if the template supports localization) | `false` | `DISABLE_L10N` |
| `--default-error-page="…"` | The code of the default (index page, when a code is not specified) error page to render | `404` | `DEFAULT_ERROR_PAGE` |
| `--send-same-http-code` | The HTTP response should have the same status code as the requested error page (by default, every response with an error page will have a status code of 200) | `false` | `SEND_SAME_HTTP_CODE` |
| `--show-details` | Show request details in the error page response (if supported by the template) | `false` | `SHOW_DETAILS` |
| `--proxy-headers="…"` | HTTP headers listed here will be proxied from the original request to the error page response (comma-separated list) | `X-Request-Id,X-Trace-Id,X-Amzn-Trace-Id` | `PROXY_HTTP_HEADERS` |
| `--rotation-mode="…"` | Templates automatic rotation mode (disabled/random-on-startup/random-on-each-request/random-hourly/random-daily) | `disabled` | `TEMPLATES_ROTATION_MODE` |
| `--read-buffer-size="…"` | Per-connection buffer size in bytes for reading requests, this also limits the maximum header size (increase this buffer if your clients send multi-KB Request URIs and/or multi-KB headers (e.g., large cookies), note that increasing this value will increase memory consumption) | `5120` | `READ_BUFFER_SIZE` |
| `--disable-minification` | Disable the minification of HTML pages, including CSS, SVG, and JS (may be useful for debugging) | `false` | `DISABLE_MINIFICATION` |
### `build` command (aliases: `b`)
Build the static error pages and put them into a specified directory.
Usage:
```bash
$ error-pages [GLOBAL FLAGS] build [COMMAND FLAGS] [ARGUMENTS...]
```
The following flags are supported:
| Name | Description | Default value | Environment variables |
|---------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:-------------:|:----------------------:|
| `--add-template="…"` | To add a new template, provide the path to the file using this flag (the filename without the extension will be used as the template name) | `[]` | `ADD_TEMPLATE` |
| `--disable-template="…"` | Disable the specified template by its name (useful to disable the built-in templates and use only custom ones) | `[]` | *none* |
| `--add-code="…"` | To add a new HTTP status code, provide the code and its message/description using this flag (the format should be '%code%=%message%/%description%'; the code may contain a wildcard '*' to cover multiple codes at once, for example, '4**' will cover all 4xx codes unless a more specific code is described previously) | `map[]` | *none* |
| `--disable-l10n` | Disable localization of error pages (if the template supports localization) | `false` | `DISABLE_L10N` |
| `--index` (`-i`) | Generate index.html file with links to all error pages | `false` | *none* |
| `--target-dir="…"` (`--out`, `--dir`, `-o`) | Directory to put the built error pages into | `.` | *none* |
| `--disable-minification` | Disable the minification of HTML pages, including CSS, SVG, and JS (may be useful for debugging) | `false` | `DISABLE_MINIFICATION` |
### `healthcheck` command (aliases: `chk`, `health`, `check`)
Health checker for the HTTP server. The use case - docker health check.
Usage:
```bash
$ error-pages [GLOBAL FLAGS] healthcheck [COMMAND FLAGS] [ARGUMENTS...]
```
The following flags are supported:
| Name | Description | Default value | Environment variables |
|---------------------|-----------------------------------------------|:-------------:|:---------------------:|
| `--port="…"` (`-p`) | TCP port number with the HTTP server to check | `8080` | `LISTEN_PORT` |
<!--/GENERATED:CLI_DOCS-->
## 🦾 Contributors
I want to say a big thank you to everyone who contributed to this project:
[![contributors](https://contrib.rocks/image?repo=tarampampam/error-pages)][contributors]
[contributors]:https://github.com/tarampampam/error-pages/graphs/contributors
## 👾 Support
[![Issues][badge-issues]][issues]
[![Issues][badge-prs]][prs]
If you encounter any bugs in the project, please [create an issue][new-issue] in this repository.
[badge-issues]:https://img.shields.io/github/issues/tarampampam/error-pages.svg?maxAge=45
[badge-prs]:https://img.shields.io/github/issues-pr/tarampampam/error-pages.svg?maxAge=45
[issues]:https://github.com/tarampampam/error-pages/issues
[prs]:https://github.com/tarampampam/error-pages/pulls
[new-issue]:https://github.com/tarampampam/error-pages/issues/new/choose
## 📖 License
This is open-sourced software licensed under the [MIT License][license].
[license]:https://github.com/tarampampam/error-pages/blob/master/LICENSE
[ingress-nginx]:https://github.com/kubernetes/ingress-nginx/tree/main/charts/ingress-nginx
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