bind address can be configured by environment variables

Dockerfile

@@ -1,10 +1,13 @@
-FROM erseco/alpine-php-webserver
-LABEL maintainer="Sven Vogel <sven.vogel123@web.de>"
-LABEL version="1.0.1"
+FROM golang:1.20-alpine
+WORKDIR /usr/src/app
 
-COPY php/index-inlined-minified.php /var/www/html/index.php
-COPY php/messages.php /var/www/html/messages.php
-COPY nginx.conf /etc/nginx
+# pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
+COPY go.mod index-inlined-minified.html main.go ./
+RUN go mod download && go mod verify
 
-# Let runit start nginx & php-fpm
-CMD [ "/bin/docker-entrypoint.sh" ]
+RUN go build -v -o /usr/local/bin/app ./...
+
+ENV PORT=8000
+ENV BIND=0.0.0.0
+
+CMD ["app"]

Makefile

@@ -0,0 +1,12 @@
+
+compile-web:
+	cd web && inliner page.html > ../index-inlined-minified.html
+
+run:
+	go run .
+
+docker-build:
+	docker build -t errorpages .
+
+docker-run:
+	docker run -itd --rm -p 8000:8000 -e BIND="0.0.0.0" -e PORT="8000" --name errorpages errorpages

devbox.json

@@ -3,7 +3,8 @@
         "go",
         "gopls",
         "nodejs",
-        "nodePackages.vscode-html-languageserver-bin"
+        "nodePackages.vscode-html-languageserver-bin",
+        "nodePackages.inliner"
     ],
     "nixpkgs": {
         "commit": "f80ac848e3d6f0c12c52758c0f25c10c97ca3b62"

go.mod

@@ -0,0 +1,3 @@
+module Homelab/Errorpages
+
+go 1.19

main.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"html/template"
+	"log"
+	"net/http"
+	"os"
+	"strconv"
+)
+
+type StatusData struct {
+	Code     string
+	Message  string
+	Response int
+}
+
+var Statuses = map[string]string{
+	"401": "You are not authorized to access the resource",
+	"404": "The requested resource couldn't be found",
+	"403": "Access to the resource was denied for the server",
+	"405": "Method not supported by the server",
+	"407": "You are no authorized to access the resource",
+	"408": "Request timed out",
+	"410": "The requested content is permanently gone",
+	"414": "Requested URI is too long",
+	"415": "Unsupported media type",
+	"500": "The server encountered an internal error",
+	"501": "Method not supported by the server",
+	"502": "Requested endpoint encountered an error",
+	"503": "Service is currently unavailable",
+	"504": "Requested endpoint is unreachable",
+	"505": "Protocol version not supported",
+	"511": "Requested endpoint requires authentication for proxy",
+}
+
+func isStatusCode(code string) (int, error) {
+	num, err := strconv.Atoi(code)
+	if err != nil {
+		return 500, errors.New("not a number")
+	}
+
+	if num > 99 && num < 512 {
+		return num, nil
+	}
+
+	return 500, errors.New("Invalid range")
+}
+
+func genStatus(request string) StatusData {
+	// create and init page status
+	var status StatusData
+	status.Code = "500"
+	status.Message = fmt.Sprintf("Invalid error response code recieved: %.5s[..]", request)
+	status.Response = 500
+
+	// check if we have a valid status code
+	var code, err = isStatusCode(request)
+	if err == nil {
+		status.Code = request
+		status.Message = fmt.Sprintf("Interrupted unsupported error response: %s", request)
+		status.Response = code
+	}
+
+	// set custom status message if present
+	description, ok := Statuses[request]
+	if ok {
+		status.Message = description
+	}
+
+	return status
+}
+
+func main() {
+	// load template
+	tmpl, err := template.ParseFiles("index-inlined-minified.html")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		status := genStatus(r.URL.Path[1:])
+		// set status code to propagate http error code
+		w.WriteHeader(status.Response)
+		tmpl.Execute(w, status)
+	})
+
+	var address = fmt.Sprintf("%s:%s", os.Getenv("BIND"), os.Getenv("PORT"))
+
+	log.Fatal(http.ListenAndServe(address, nil))
+}

nginx.conf

@@ -1,104 +0,0 @@
-worker_processes 1;
-error_log stderr warn;
-pid /run/nginx.pid;
-
-events {
-    worker_connections 1024;
-}
-
-http {
-    include mime.types;
-    default_type application/octet-stream;
-
-    # Define custom log format to include reponse times
-    log_format main_timed '$remote_addr - $remote_user [$time_local] "$request" '
-                          '$status $body_bytes_sent "$http_referer" '
-                          '"$http_user_agent" "$http_x_forwarded_for" '
-                          '$request_time $upstream_response_time $pipe $upstream_cache_status';
-
-    access_log /dev/stdout main_timed;
-    error_log /dev/stderr notice;
-
-    keepalive_timeout 65;
-
-    # Write temporary files to /tmp so they can be created as a non-privileged user
-    client_body_temp_path /tmp/client_temp;
-    proxy_temp_path /tmp/proxy_temp_path;
-    fastcgi_temp_path /tmp/fastcgi_temp;
-    uwsgi_temp_path /tmp/uwsgi_temp;
-    scgi_temp_path /tmp/scgi_temp;
-
-    # Default server definition
-    server {
-        listen 8080 default_server;
-        server_name _;
-
-        sendfile off;
-
-        # Increase proxy buffers for large requests
-        proxy_buffer_size 128k;
-        proxy_buffers 4 256k;
-        proxy_busy_buffers_size 256k;
-
-        # Upload limit
-        client_max_body_size 2M;
-        client_body_buffer_size 128k;
-
-        root /var/www/html;
-        index index.php index.html;
-
-        location / {
-            # First attempt to serve request as file, then
-            # as directory, then fall back to index.php
-            try_files $uri $uri/ /index.php?q=$uri&$args;
-        }
-
-        # Redirect server error pages to the static page /50x.html
-        error_page 500 502 503 504 /50x.html;
-        location = /50x.html {
-            root /var/lib/nginx/html;
-        }
-
-        # Pass the PHP scripts to PHP-FPM listening on 127.0.0.1:9000
-        location ~ [^/]\.php(/|$) {
-            fastcgi_split_path_info ^(.+\.php)(/.+)$;
-            fastcgi_pass 127.0.0.1:9000;
-            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
-            fastcgi_param SCRIPT_NAME $fastcgi_script_name;
-            fastcgi_param PATH_INFO $fastcgi_path_info;
-            fastcgi_index index.php;
-            fastcgi_intercept_errors off;
-            include fastcgi_params;
-        }
-
-        location ~* \.(jpg|jpeg|gif|png|css|js|ico|xml)$ {
-            expires 5d;
-        }
-
-        # Deny access to . files, for security
-        location ~ /\. {
-            log_not_found off;
-            deny all;
-        }
-
-        # Allow fpm ping and status from localhost
-        location ~ ^/(fpm-status|fpm-ping)$ {
-            access_log off;
-            allow 127.0.0.1;
-            deny all;
-            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
-            include fastcgi_params;
-            fastcgi_pass 127.0.0.1:9000;
-        }
-    }
-
-    # Include other server configs
-    include /etc/nginx/conf.d/*.conf;
-
-    gzip on;
-    gzip_proxied any;
-    gzip_types text/plain application/xml text/css text/js text/xml application/x-javascript text/javascript application/json application/xml+rss;
-    gzip_vary on;
-    gzip_disable "msie6";
-
-}

php/messages.php

@@ -1,35 +0,0 @@
-<?php
-
-const RESPONSES = [
-    // Currently supported responses
-    // See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status#server_error_responses
-    401 => "You are not authorized to access the resource",
-    404 => "The requested resource couldn't be found",
-    403 => "Access to the resource was denied for the server",
-    405 => "Method not supported by the server",
-    407 => "You are no authorized to access the resource",
-    408 => "Request timed out",
-    500 => "The server encountered an internal error",
-    501 => "Method not supported by the server",
-    502 => "Requested endpoint encountered an error",
-    503 => "Service is currently unavailable",
-    504 => "Requested endpoint is unreachable",
-    511 => "Requested endpoint requires authentication for proxy",
-];
-
-function get_status_message($uri): array
-{
-    $status = "501";
-    $message = "The received status is unsupported by this server: `" . substr($uri, 0, 10) . "`";
-    $int_code = 501;
-
-    $code = intval(trim(str_replace("/", "", $uri)));
-
-    if (key_exists($code, RESPONSES)) {
-        $int_code = $code;
-        $status = (string) $code;
-        $message = RESPONSES[$code];
-    }
-
-    return [$status, $message, $int_code];
-}

web/master.css

@@ -163,4 +163,4 @@ div {
     100% {
         background-position: calc(100% + 8rem) 0;
     }
-}
+}

web/page.html

@@ -1,11 +1,3 @@
-<?php
-include "messages.php";
-
-global $response;
-$response = get_status_message($_SERVER["REQUEST_URI"]);
-
-http_response_code($response[2]);
-?>
 <!doctype html>
 <html lang="en">
 <head>
@@ -13,6 +5,7 @@ http_response_code($response[2]);
     <meta name="viewport"
           content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
     <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <meta name="darkreader-lock"> <!-- Request dark reader to ignore this site. See: https://github.com/darkreader/darkreader/blob/main/CONTRIBUTING.md#disabling-dark-reader-on-your-site -->
     <title>Montehaselino - Automatic Status Response</title>
     <link href="master.css" rel="stylesheet"/>
 </head>
@@ -24,14 +17,15 @@ http_response_code($response[2]);
         <img id="mountain" src="res/svg/error-page-overlay.svg" alt="">
         <div id="rocks"></div>
         <h1>ERROR</h1>
-            <?php
-            global $response;
-            echo "<h2>" . $response[0] ."</h2>";
-            echo "<h3>" . $response[1] . "</h3>";
-            ?>
+        <h2>{{.Code}}</h2>
+        <h3>{{.Message}}</h3>
         <a href="javascript:window.history.back();">Go Back</a>
         <hr>
-        <div class="subtle">This is an automatically generated error response page.<br>Please contact administration if you feel this shouldn't be here.</div>
+        <div class="subtle">
+            This is an automatically generated error response page. <br>
+            Please contact administration if you feel this shouldn't be here.
+        </div>
     </div>
  </body>
-</html>
+</html>
+