Initial commit

.env.example

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+MESSAGE=Test MESSAGE

.gitea/workflows/build.yml

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+name: Build Docker
+run-name: Build Docker Image
+on:
+  push:
+
+jobs:
+  BuildSite:
+    runs-on: [ubuntu-latest, amd]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Install Docker
+        run : |
+          apt-get install ca-certificates curl gnupg
+          install -m 0755 -d /etc/apt/keyrings
+          curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+          chmod a+r /etc/apt/keyrings/docker.gpg
+          echo "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
+          apt-get update
+          apt-get install docker-ce-cli -y          
+      - name: Build Docker image
+        run : |          
+          echo "${{ secrets.DOCKERGIT_TOKEN }}" | docker login git.woodburn.au -u nathanwoodburn --password-stdin
+          echo "branch=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}"
+          tag=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}
+          tag=${tag//\//-}
+          tag_num=${GITHUB_RUN_NUMBER}
+          echo "tag_num=$tag_num"
+
+          if [[ "$tag" == "main" ]]; then
+            tag="latest"
+          else
+            tag_num="${tag}-${tag_num}"
+          fi
+
+          echo "tag=$tag"
+          echo "tag_num=$tag_num"
+          repo=$GITHUB_REPOSITORY
+          # Remove the org name
+          repo=${repo#*/}
+          echo "container=$repo"
+          
+          
+
+          docker build -t $repo:$tag_num .
+          docker tag $repo:$tag_num git.woodburn.au/nathanwoodburn/$repo:$tag_num
+          docker push git.woodburn.au/nathanwoodburn/$repo:$tag_num
+          docker tag $repo:$tag_num git.woodburn.au/nathanwoodburn/$repo:$tag
+          docker push git.woodburn.au/nathanwoodburn/$repo:$tag

.gitignore

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+
+main
+.env

Dockerfile

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+# syntax=docker/dockerfile:1
+FROM golang:1.21
+
+# Set destination for COPY
+WORKDIR /app
+
+COPY main.go ./
+COPY go.mod ./
+COPY go.sum ./
+COPY templates ./templates/
+RUN go get
+RUN go build main.go
+EXPOSE 3000
+
+# Run
+CMD ["./main"]

README.md

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+# Go Webserver template

go.mod

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+module git.woodburn.au/nathanwoodburn/go-webserver-template
+
+go 1.21.3
+
+require github.com/joho/godotenv v1.5.1

go.sum

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+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=

main.go

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+package main
+
+import (
+	"fmt"
+	"html/template"
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+
+	"github.com/joho/godotenv"
+)
+
+func main() {
+	// Load the .env file
+	err := godotenv.Load()
+	if err != nil {
+		// Try to load the .env.example file
+		fmt.Println("Error loading .env file, trying .env.example")
+		err = godotenv.Load(".env.example")
+		if err != nil {
+			log.Fatal("Error loading .env.example file")
+		}
+	}
+	http.HandleFunc("/", mainHandler)
+	http.HandleFunc("/assets/", assetHandler)
+
+	fmt.Println("Starting server on :3000 ...")
+	log.Fatal(http.ListenAndServe(":3000", nil))
+}
+
+func mainHandler(w http.ResponseWriter, r *http.Request) {
+	// Sanitize the path to prevent directory traversal attacks
+	relPath := r.URL.Path
+	if relPath == "/" {
+		relPath = "/index"
+	}
+
+	// Check method
+	switch r.Method {
+	case http.MethodGet:
+		getHandler(relPath, w, r)
+	case http.MethodPost:
+		postHandler(relPath, w, r)
+	default:
+		errorPage(405, w, r)
+
+	}
+
+}
+
+func getHandler(relPath string, w http.ResponseWriter, r *http.Request) {
+	tmplPath := filepath.Join("templates", filepath.Clean(relPath)+".html")
+
+	// Get message from Env
+	message := os.Getenv("MESSAGE")
+
+	// Parse the template
+	tmpl, err := template.ParseFiles(tmplPath)
+	if err != nil {
+		errorPage(404, w, r)
+		return
+	}
+
+	// Create a map to hold the data
+	requestData := map[string]interface{}{"envMessage": message}
+
+	// Execute the template
+	err = tmpl.Execute(w, requestData)
+	if err != nil {
+		http.Error(w, "Error rendering template", http.StatusInternalServerError)
+	}
+}
+
+func postHandler(relPath string, w http.ResponseWriter, r *http.Request) {
+	switch relPath {
+	case "/index":
+		indexPostHandler(w, r)
+	default:
+		errorPage(405, w, r)
+	}
+}
+
+func indexPostHandler(w http.ResponseWriter, r *http.Request) {
+	// Parse the form data
+	err := r.ParseForm()
+	if err != nil {
+		errorPage(500, w, r)
+		return
+	}
+
+	// Get the form data
+	message := r.FormValue("message")
+
+	// Print the message to the console
+	log.Printf("Message: %s", message)
+
+	// Create a map to hold the data
+	requestData := map[string]interface{}{
+		"message": message,
+	}
+
+	// Return a page with message
+	tmpl, err := template.ParseFiles("templates/index.html")
+	if err != nil {
+		errorPage(500, w, r)
+		return
+	}
+
+	err = tmpl.Execute(w, requestData)
+
+}
+
+func errorPage(errorCode int, w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(errorCode)
+	tmpl, err := template.ParseFiles("templates/error.html")
+	if err != nil {
+		log.Printf("Error loading error page template: %v", err)
+		http.Error(w, "Error loading error page", http.StatusInternalServerError)
+		return
+	}
+
+	errorMsgs := map[int]string{
+		404: "Page not found for " + r.URL.Path,
+		405: "Method not allowed",
+		500: "Internal server error",
+	}
+
+	// Check if errorcode isn't in the map
+	if _, ok := errorMsgs[errorCode]; !ok {
+		errorCode = 500
+	}
+
+	// Correcting the initialization of the errorData map
+	errorData := map[string]interface{}{
+		"short": errorCode,
+		"long":  errorMsgs[errorCode],
+	}
+
+	err = tmpl.Execute(w, errorData)
+	if err != nil {
+		log.Printf("Error executing error page template: %v", err)
+		http.Error(w, "Error rendering error page", http.StatusInternalServerError)
+	}
+}
+
+func assetHandler(w http.ResponseWriter, r *http.Request) {
+	// Serve static files from templates/assets
+	http.ServeFile(w, r, filepath.Join("templates", filepath.Clean(r.URL.Path)))
+}

templates/about.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Go HTML Template</title>
+    <link rel="stylesheet" href="/assets/css/index.css">
+    <link rel="icon" href="/assets/img/favicon.png">
+</head>
+<body>
+    <h1>About page</h1>
+</body>
+</html>

templates/assets/css/error.css

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+html {
+    background-color: black;
+    color: white;
+    text-align: center;
+}

templates/assets/css/index.css

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+html {
+    background-color: black;
+    color: white;
+}

templates/error.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Error {{.short}}</title>
+    <link rel="stylesheet" href="/assets/css/error.css">
+    <link rel="icon" href="/assets/img/favicon.png">
+</head>
+<body>
+    <h1>Error {{.short}}</h1>    
+    <p>{{.long}}</p>
+</body>
+</html>

templates/index.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Go HTML Template</title>
+    <link rel="stylesheet" href="/assets/css/index.css">
+    <link rel="icon" href="/assets/img/favicon.png">
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    {{if .envMessage }}
+        <p>{{.envMessage}}</p>
+    {{end}}
+
+    {{if .message}}
+        <p>{{.message}}</p>
+    {{end}}
+    <form action="/" method="post">
+        <input type="text" name="message" placeholder="Enter your message">
+        <button type="submit">Submit</button>
+    </form>
+</body>
+</html>