Merge branch 'master' into enhanced_routing_and_logout_fixes

README.md

@@ -18,8 +18,8 @@ fine with getting your hands dirty, but I plan on having it ready to go for more
 - Minimal user login/registration + sessions
 - Config file handling
 - Scheduled tasks
-- Entire website compiles into a single binary (~10mb) (excluding env.toml)
+- Entire website compiles into a single binary (~10mb) (excluding env.json)
-- Minimal dependencies (just standard library, postgres driver, and experimental package for bcrypt)
+- Minimal dependencies (just standard library, postgres driver, and x/crypto for bcrypt)
 
 <hr>
 
@@ -41,7 +41,7 @@ fine with getting your hands dirty, but I plan on having it ready to go for more
 1. Clone
 2. Delete the git folder, so you can start tracking in your own repo
 3. Run `go get` to install dependencies
-4. Copy env_example.toml to env.toml and fill in the values
+4. Copy env_example.json to env.json and fill in the values
 5. Run `go run main.go` to start the server
 6. Rename the occurences of "GoWeb" to your app name
 7. Start building your app!
@@ -59,7 +59,7 @@ fine with getting your hands dirty, but I plan on having it ready to go for more
 ### License and disclaimer 😤
 
 - You are free to use this project under the terms of the MIT license. See LICENSE for more details.
-- You and you alone are responsible for the security and everything else regarding your application.
+- You are responsible for the security and everything else regarding your application.
 - It is not required, but I ask that when you use this project you give me credit by linking to this repository.
 - I also ask that when releasing self-hosted or other end-user applications that you release it under
   the [GPLv3](https://www.gnu.org/licenses/gpl-3.0.html) license. This too is not required, but I would appreciate it.

app/schedule.go

@@ -17,8 +17,8 @@ type Scheduled struct {
 }
 
 type Task struct {
-	Interval time.Duration
 	Funcs    []func(app *App)
+	Interval time.Duration
 }
 
 func RunScheduledTasks(app *App, poolSize int, stop <-chan struct{}) {
@@ -27,13 +27,13 @@ func RunScheduledTasks(app *App, poolSize int, stop <-chan struct{}) {
 	}
 
 	tasks := []Task{
-		{Interval: time.Second, Funcs: app.ScheduledTasks.EverySecond},
+		{Funcs: app.ScheduledTasks.EverySecond, Interval: time.Second},
-		{Interval: time.Minute, Funcs: app.ScheduledTasks.EveryMinute},
+		{Funcs: app.ScheduledTasks.EveryMinute, Interval: time.Minute},
-		{Interval: time.Hour, Funcs: app.ScheduledTasks.EveryHour},
+		{Funcs: app.ScheduledTasks.EveryHour, Interval: time.Hour},
-		{Interval: 24 * time.Hour, Funcs: app.ScheduledTasks.EveryDay},
+		{Funcs: app.ScheduledTasks.EveryDay, Interval: 24 * time.Hour},
-		{Interval: 7 * 24 * time.Hour, Funcs: app.ScheduledTasks.EveryWeek},
+		{Funcs: app.ScheduledTasks.EveryWeek, Interval: 7 * 24 * time.Hour},
-		{Interval: 30 * 24 * time.Hour, Funcs: app.ScheduledTasks.EveryMonth},
+		{Funcs: app.ScheduledTasks.EveryMonth, Interval: 30 * 24 * time.Hour},
-		{Interval: 365 * 24 * time.Hour, Funcs: app.ScheduledTasks.EveryYear},
+		{Funcs: app.ScheduledTasks.EveryYear, Interval: 365 * 24 * time.Hour},
 	}
 
 	var wg sync.WaitGroup

config/config.go

@@ -1,44 +1,54 @@
 package config
 
 import (
+	"encoding/json"
 	"flag"
-	"github.com/BurntSushi/toml"
+	"log/slog"
 	"os"
 )
 
 type Configuration struct {
 	Db struct {
-		Ip          string `toml:"DbIp"`
+		Ip          string `json:"DbIp"`
-		Port        string `toml:"DbPort"`
+		Port        string `json:"DbPort"`
-		Name        string `toml:"DbName"`
+		Name        string `json:"DbName"`
-		User        string `toml:"DbUser"`
+		User        string `json:"DbUser"`
-		Password    string `toml:"DbPassword"`
+		Password    string `json:"DbPassword"`
-		AutoMigrate bool   `toml:"DbAutoMigrate"`
+		AutoMigrate bool   `json:"DbAutoMigrate"`
 	}
 
 	Listen struct {
-		Ip   string `toml:"HttpIp"`
+		Ip   string `json:"HttpIp"`
-		Port string `toml:"HttpPort"`
+		Port string `json:"HttpPort"`
 	}
 
 	Template struct {
-		BaseName string `toml:"BaseTemplateName"`
+		BaseName    string `json:"BaseTemplateName"`
+		ContentPath string `json:"ContentPath"`
 	}
 }
 
 // LoadConfig loads and returns a configuration struct
 func LoadConfig() Configuration {
-	c := flag.String("c", "env.toml", "Path to the toml configuration file")
+	c := flag.String("c", "env.json", "Path to the json configuration file")
 	flag.Parse()
-	file, err := os.ReadFile(*c)
+	file, err := os.Open(*c)
 	if err != nil {
-		panic("Unable to read TOML config file: " + err.Error())
+		panic("unable to open JSON config file: " + err.Error())
 	}
 
-	var Config Configuration
+	defer func(file *os.File) {
-	_, err = toml.Decode(string(file), &Config)
+		err := file.Close()
 		if err != nil {
-		panic("Unable to decode TOML config file: " + err.Error())
+			slog.Error("unable to close JSON config file: ", err)
+		}
+	}(file)
+
+	decoder := json.NewDecoder(file)
+	Config := Configuration{}
+	err = decoder.Decode(&Config)
+	if err != nil {
+		panic("unable to decode JSON config file: " + err.Error())
 	}
 
 	return Config

controllers/get.go

@@ -13,21 +13,37 @@ type Get struct {
 	App *app.App
 }
 
-func (g *Get) ShowHome(w http.ResponseWriter, _ *http.Request) {
+func (g *Get) ShowHome(w http.ResponseWriter, r *http.Request) {
 	type dataStruct struct {
+		CsrfToken       string
+		IsAuthenticated bool
 		Test            string
 	}
 
-	data := dataStruct{
+	CsrfToken, err := security.GenerateCsrfToken(w, r)
-		Test: "Hello World!",
+	if err != nil {
+		return
 	}
 
-	templating.RenderTemplate(g.App, w, "templates/pages/home.html", data)
+	isAuthenticated := true
+	user, err := models.CurrentUser(g.App, r)
+	if err != nil || user.Id == 0 {
+		isAuthenticated = false
+	}
+
+	data := dataStruct{
+		CsrfToken:       CsrfToken,
+		Test:            "Hello World!",
+		IsAuthenticated: isAuthenticated,
+	}
+
+	templating.RenderTemplate(w, "templates/pages/home.html", data)
 }
 
 func (g *Get) ShowRegister(w http.ResponseWriter, r *http.Request) {
 	type dataStruct struct {
 		CsrfToken       string
+		IsAuthenticated bool
 	}
 
 	CsrfToken, err := security.GenerateCsrfToken(w, r)
@@ -35,16 +51,24 @@ func (g *Get) ShowRegister(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	data := dataStruct{
+	isAuthenticated := true
-		CsrfToken: CsrfToken,
+	user, err := models.CurrentUser(g.App, r)
+	if err != nil || user.Id == 0 {
+		isAuthenticated = false
 	}
 
-	templating.RenderTemplate(g.App, w, "templates/pages/register.html", data)
+	data := dataStruct{
+		CsrfToken:       CsrfToken,
+		IsAuthenticated: isAuthenticated,
+	}
+
+	templating.RenderTemplate(w, "templates/pages/register.html", data)
 }
 
 func (g *Get) ShowLogin(w http.ResponseWriter, r *http.Request) {
 	type dataStruct struct {
 		CsrfToken       string
+		IsAuthenticated bool
 	}
 
 	CsrfToken, err := security.GenerateCsrfToken(w, r)
@@ -56,10 +80,5 @@ func (g *Get) ShowLogin(w http.ResponseWriter, r *http.Request) {
 		CsrfToken: CsrfToken,
 	}
 
-	templating.RenderTemplate(g.App, w, "templates/pages/login.html", data)
+	templating.RenderTemplate(w, "templates/pages/login.html", data)
-}
-
-func (g *Get) Logout(w http.ResponseWriter, r *http.Request) {
-	models.LogoutUser(g.App, w, r)
-	http.Redirect(w, r, "/", http.StatusFound)
 }

controllers/post.go

@@ -50,3 +50,8 @@ func (p *Post) Register(w http.ResponseWriter, r *http.Request) {
 
 	http.Redirect(w, r, "/login", http.StatusFound)
 }
+
+func (p *Post) Logout(w http.ResponseWriter, r *http.Request) {
+	models.LogoutUser(p.App, w, r)
+	http.Redirect(w, r, "/", http.StatusFound)
+}

database/migrate.go

@@ -9,7 +9,8 @@ import (
 	"reflect"
 )
 
-// Migrate given a dummy object of any type, it will create a table with the same name as the type and create columns with the same name as the fields of the object
+// Migrate given a dummy object of any type, it will create a table with the same name
+// as the type and create columns with the same name as the fields of the object
 func Migrate(app *app.App, anyStruct interface{}) error {
 	valueOfStruct := reflect.ValueOf(anyStruct)
 	typeOfStruct := valueOfStruct.Type()
@@ -23,6 +24,10 @@ func Migrate(app *app.App, anyStruct interface{}) error {
 	for i := 0; i < valueOfStruct.NumField(); i++ {
 		fieldType := typeOfStruct.Field(i)
 		fieldName := fieldType.Name
+
+		// Create column if dummy for migration is NOT zero value
+		fieldValue := valueOfStruct.Field(i).Interface()
+		if !reflect.ValueOf(fieldValue).IsZero() {
 			if fieldName != "Id" && fieldName != "id" {
 				err := createColumn(app, tableName, fieldName, fieldType.Type.Name())
 				if err != nil {
@@ -30,6 +35,7 @@ func Migrate(app *app.App, anyStruct interface{}) error {
 				}
 			}
 		}
+	}
 
 	return nil
 }

env_example.json

@@ -0,0 +1,18 @@
+{
+  "Db": {
+    "DbIp": "127.0.0.1",
+    "DbPort": "5432",
+    "DbName": "database",
+    "DbUser": "user",
+    "DbPassword": "password",
+    "DbAutoMigrate": true
+  },
+  "Listen": {
+    "HttpIp": "127.0.0.1",
+    "HttpPort": "8090"
+  },
+  "Template": {
+    "BaseTemplateName": "templates/base.html",
+    "ContentPath": "templates"
+  }
+}

env_example.toml

@@ -1,14 +0,0 @@
-[Db]
-DbIp = "127.0.0.1"
-DbPort = "5432"
-DbName = "test"
-DbUser = "postgres"
-DbPassword = "postgres"
-DbAutoMigrate = true
-
-[Listen]
-HttpIp = "127.0.0.1"
-HttpPort = "8090"
-
-[Template]
-BaseTemplateName = "templates/base.html"

go.mod

@@ -1,10 +1,8 @@
 module GoWeb
 
-go 1.21
+go 1.22
 
 require (
 	github.com/lib/pq v1.10.9
-	golang.org/x/crypto v0.13.0
+	golang.org/x/crypto v0.20.0
 )
-
-require github.com/BurntSushi/toml v1.3.2

go.sum

@@ -1,6 +1,4 @@
-github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8=
-github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
-golang.org/x/crypto v0.13.0 h1:mvySKfSWJ+UKUii46M40LOvyWfN0s2U+46/jDd0e6Ck=
+golang.org/x/crypto v0.20.0 h1:jmAMJJZXr5KiCw05dfYK9QnqaqKLYXijU23lsEdcQqg=
-golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
+golang.org/x/crypto v0.20.0/go.mod h1:Xwo95rrVNIoSMx9wa1JroENMToLWn3RNVrTBpLHgZPQ=

main.go

@@ -6,6 +6,7 @@ import (
 	"GoWeb/database"
 	"GoWeb/models"
 	"GoWeb/routes"
+	"GoWeb/templating"
 	"context"
 	"embed"
 	"errors"
@@ -67,6 +68,13 @@ func main() {
 	routes.Get(&appLoaded)
 	routes.Post(&appLoaded)
 
+	// Prepare templates
+	err = templating.BuildPages(&appLoaded)
+	if err != nil {
+		slog.Error("error building templates: " + err.Error())
+		os.Exit(1)
+	}
+
 	// Start server
 	server := &http.Server{Addr: appLoaded.Config.Listen.Ip + ":" + appLoaded.Config.Listen.Port}
 	go func() {

models/migrations.go

@@ -25,7 +25,7 @@ func RunAllMigrations(app *app.App) error {
 		Id:         1,
 		UserId:     1,
 		AuthToken:  "migrate",
-		RememberMe: false,
+		RememberMe: true, // Booleans must be true to migrate properly
 		CreatedAt:  time.Now(),
 	}
 	err = database.Migrate(app, session)

models/session.go

@@ -17,7 +17,7 @@ type Session struct {
 	CreatedAt  time.Time
 }
 
-const sessionColumnsNoId = "\"UserId\", \"AuthToken\",\"RememberMe\", \"CreatedAt\""
+const sessionColumnsNoId = "\"UserId\", \"AuthToken\", \"RememberMe\", \"CreatedAt\""
 const sessionColumns = "\"Id\", " + sessionColumnsNoId
 const sessionTable = "public.\"Session\""
 
@@ -62,7 +62,7 @@ func CreateSession(app *app.App, w http.ResponseWriter, userId int64, remember b
 	return session, nil
 }
 
-func GetSessionByAuthToken(app *app.App, authToken string) (Session, error) {
+func SessionByAuthToken(app *app.App, authToken string) (Session, error) {
 	session := Session{}
 
 	err := app.Db.QueryRow(selectSessionByAuthToken, authToken).Scan(&session.Id, &session.UserId, &session.AuthToken, &session.RememberMe, &session.CreatedAt)

models/user.go

@@ -2,6 +2,8 @@ package models
 
 import (
 	"GoWeb/app"
+	"crypto/sha256"
+	"encoding/hex"
 	"log/slog"
 	"net/http"
 	"time"
@@ -27,23 +29,23 @@ const (
 	insertUser           = "INSERT INTO " + userTable + " (" + userColumnsNoId + ") VALUES ($1, $2, $3, $4) RETURNING \"Id\""
 )
 
-// GetCurrentUser finds the currently logged-in user by session cookie
+// CurrentUser finds the currently logged-in user by session cookie
-func GetCurrentUser(app *app.App, r *http.Request) (User, error) {
+func CurrentUser(app *app.App, r *http.Request) (User, error) {
 	cookie, err := r.Cookie("session")
 	if err != nil {
 		return User{}, err
 	}
 
-	session, err := GetSessionByAuthToken(app, cookie.Value)
+	session, err := SessionByAuthToken(app, cookie.Value)
 	if err != nil {
 		return User{}, err
 	}
 
-	return GetUserById(app, session.UserId)
+	return UserById(app, session.UserId)
 }
 
-// GetUserById finds a User table row in the database by id and returns a struct representing this row
+// UserById finds a User table row in the database by id and returns a struct representing this row
-func GetUserById(app *app.App, id int64) (User, error) {
+func UserById(app *app.App, id int64) (User, error) {
 	user := User{}
 
 	err := app.Db.QueryRow(selectUserById, id).Scan(&user.Id, &user.Username, &user.Password, &user.CreatedAt, &user.UpdatedAt)
@@ -54,8 +56,8 @@ func GetUserById(app *app.App, id int64) (User, error) {
 	return user, nil
 }
 
-// GetUserByUsername finds a User table row in the database by username and returns a struct representing this row
+// UserByUsername finds a User table row in the database by username and returns a struct representing this row
-func GetUserByUsername(app *app.App, username string) (User, error) {
+func UserByUsername(app *app.App, username string) (User, error) {
 	user := User{}
 
 	err := app.Db.QueryRow(selectUserByUsername, username).Scan(&user.Id, &user.Username, &user.Password, &user.CreatedAt, &user.UpdatedAt)
@@ -68,7 +70,12 @@ func GetUserByUsername(app *app.App, username string) (User, error) {
 
 // CreateUser creates a User table row in the database
 func CreateUser(app *app.App, username string, password string, createdAt time.Time, updatedAt time.Time) (User, error) {
-	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	// Get sha256 hash of password then get bcrypt hash to store
+	hash256 := sha256.New()
+	hash256.Write([]byte(password))
+	hashSum := hash256.Sum(nil)
+	hashString := hex.EncodeToString(hashSum)
+	hash, err := bcrypt.GenerateFromPassword([]byte(hashString), bcrypt.DefaultCost)
 	if err != nil {
 		slog.Error("error hashing password: " + err.Error())
 		return User{}, err
@@ -82,7 +89,7 @@ func CreateUser(app *app.App, username string, password string, createdAt time.T
 		return User{}, err
 	}
 
-	return GetUserById(app, lastInsertId)
+	return UserById(app, lastInsertId)
 }
 
 // AuthenticateUser validates the password for the specified user
@@ -95,7 +102,12 @@ func AuthenticateUser(app *app.App, w http.ResponseWriter, username string, pass
 		return Session{}, err
 	}
 
-	err = bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(password))
+	// Get sha256 hash of password then check bcrypt
+	hash256 := sha256.New()
+	hash256.Write([]byte(password))
+	hashSum := hash256.Sum(nil)
+	hashString := hex.EncodeToString(hashSum)
+	err = bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(hashString))
 	if err != nil { // Failed to validate password, doesn't match
 		slog.Info("incorrect password:" + username)
 		return Session{}, err

routes/get.go

@@ -22,12 +22,11 @@ func Get(app *app.App) {
 		return
 	}
 	staticHandler := http.FileServer(http.FS(staticFS))
-	http.Handle("/static/", http.StripPrefix("/static/", staticHandler))
+	http.Handle("GET /static/", http.StripPrefix("/static/", staticHandler))
 	slog.Info("serving static files from embedded file system /static")
 
 	// Pages
-	http.HandleFunc("/", getController.ShowHome)
+	http.HandleFunc("GET /", getController.ShowHome)
-	http.HandleFunc("/login", getController.ShowLogin)
+	http.HandleFunc("GET /login", getController.ShowLogin)
-	http.HandleFunc("/register", getController.ShowRegister)
+	http.HandleFunc("GET /register", getController.ShowRegister)
-	http.HandleFunc("/logout", getController.Logout)
 }

routes/post.go

@@ -15,6 +15,7 @@ func Post(app *app.App) {
 	}
 
 	// User authentication
-	http.HandleFunc("/register-handle", middleware.Csrf(postController.Register))
+	http.HandleFunc("POST /register-handle", middleware.Csrf(postController.Register))
-	http.HandleFunc("/login-handle", middleware.Csrf(postController.Login))
+	http.HandleFunc("POST /login-handle", middleware.Csrf(postController.Login))
+	http.HandleFunc("POST /logout", middleware.Csrf(postController.Logout))
 }

templates/base.html

@@ -3,9 +3,24 @@
 <head>
     <meta charset="UTF-8">
     <title>SiteName - {{ template "pageTitle" }}</title>
-    <link rel="stylesheet" href="/static/css/style.css">
+    <link href="/static/css/style.css" rel="stylesheet">
 </head>
 <body>
+<div class="navbar">
+    {{ if .IsAuthenticated }}
+    <form action="/logout" method="post">
+        <input name="csrf_token" type="hidden" value="{{ .CsrfToken }}">
+        <input type="submit" value="Logout">
+    </form>
+    {{ else }}
+    <form action="/login" method="get">
+        <input type="submit" value="Login">
+    </form>
+    <form action="/register" method="get">
+        <input type="submit" value="Register">
+    </form>
+    {{ end }}
+</div>
 {{ template "content" . }}
 <div class="footer-container">
     <footer>

templates/pages/login.html

@@ -7,11 +7,11 @@
         <input name="csrf_token" type="hidden" value="{{ .CsrfToken }}">
 
         <label for="username">Username:</label><br>
-        <input id="username" name="username" type="text" placeholder="John"><br><br>
+        <input id="username" name="username" placeholder="John" type="text"><br><br>
         <label for="password">Password:</label><br>
         <input id="password" name="password" type="password"><br><br>
         <label for="remember">Remember Me:</label>
-        <input id="remember" type="checkbox" name="remember"><br><br>
+        <input id="remember" name="remember" type="checkbox"><br><br>
         <input type="submit" value="Submit">
     </form>
 </div>

templates/pages/register.html

@@ -7,7 +7,7 @@
         <input name="csrf_token" type="hidden" value="{{ .CsrfToken }}">
 
         <label for="username">Username:</label><br>
-        <input id="username" name="username" type="text" placeholder="John"><br><br>
+        <input id="username" name="username" placeholder="John" type="text"><br><br>
         <label for="password">Password:</label><br>
         <input id="password" name="password" type="password"><br><br>
         <input type="submit" value="Submit">

templating/templateHelper.go

@@ -2,45 +2,82 @@ package templating
 
 import (
 	"GoWeb/app"
+	"fmt"
 	"html/template"
+	"io/fs"
 	"log/slog"
 	"net/http"
 )
 
-// RenderTemplate renders and serves a template from the embedded filesystem optionally with given data
+var templates = make(map[string]*template.Template) // This is only used here, does not need to be in app.App
-func RenderTemplate(app *app.App, w http.ResponseWriter, contentPath string, data any) {
-	templatePath := app.Config.Template.BaseName
 
-	templateContent, err := app.Res.ReadFile(templatePath)
+func BuildPages(app *app.App) error {
+	basePath := app.Config.Template.BaseName
+
+	baseContent, err := app.Res.ReadFile(basePath)
 	if err != nil {
-		slog.Error(err.Error())
+		return fmt.Errorf("error reading base file: %w", err)
-		http.Error(w, err.Error(), 500)
-		return
 	}
 
-	t, err := template.New(templatePath).Parse(string(templateContent))
+	base, err := template.New(basePath).Parse(string(baseContent)) // Sets filepath as name and parses content
 	if err != nil {
-		slog.Error(err.Error())
+		return fmt.Errorf("error parsing base file: %w", err)
-		http.Error(w, err.Error(), 500)
-		return
 	}
 
+	readFilesRecursively := func(fsys fs.FS, root string) ([]string, error) {
+		var files []string
+		err := fs.WalkDir(fsys, root, func(path string, d fs.DirEntry, err error) error {
+			if err != nil {
+				return fmt.Errorf("error walking the path %q: %w", path, err)
+			}
+			if !d.IsDir() {
+				files = append(files, path)
+			}
+			return nil
+		})
+		return files, err
+	}
+
+	// Get all file paths in the directory tree
+	filePaths, err := readFilesRecursively(app.Res, app.Config.Template.ContentPath)
+	if err != nil {
+		return fmt.Errorf("error reading files recursively: %w", err)
+	}
+
+	for _, contentPath := range filePaths { // Create a new template base + content for each page
 		content, err := app.Res.ReadFile(contentPath)
 		if err != nil {
+			return fmt.Errorf("error reading content file %s: %w", contentPath, err)
+		}
+
+		t, err := base.Clone()
+		if err != nil {
+			return fmt.Errorf("error cloning base template: %w", err)
+		}
+
+		_, err = t.Parse(string(content))
+		if err != nil {
+			return fmt.Errorf("error parsing content: %w", err)
+		}
+
+		templates[contentPath] = t
+	}
+
+	return nil
+}
+
+func RenderTemplate(w http.ResponseWriter, contentPath string, data any) {
+	t, ok := templates[contentPath]
+	if !ok {
+		err := fmt.Errorf("template not found for path: %s", contentPath)
 		slog.Error(err.Error())
-		http.Error(w, err.Error(), 500)
+		http.Error(w, "Template not found", 404)
 		return
 	}
 
-	t, err = t.Parse(string(content))
+	err := t.Execute(w, data) // Execute prebuilt template with dynamic data
-	if err != nil {
-		slog.Error(err.Error())
-		http.Error(w, err.Error(), 500)
-		return
-	}
-
-	err = t.Execute(w, data)
 	if err != nil {
+		err = fmt.Errorf("error executing template: %w", err)
 		slog.Error(err.Error())
 		http.Error(w, err.Error(), 500)
 		return