Update README.md

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf

README.md

@@ -12,9 +12,12 @@ fine with getting your hands dirty, but I plan on having it ready to go for more
 - Routing/controllers
 - Templating
 - Simple database migration system
+- Built in REST client
 - CSRF protection
+- Middleware
 - Minimal user login/registration + sessions
 - Config file handling
+- Scheduled tasks
 - Entire website compiles into a single binary (~10mb) (excluding env.json)
 - Minimal dependencies (just standard library, postgres driver, and experimental package for bcrypt)
 

app/app.go

@@ -8,7 +8,8 @@ import (
 
 // App contains and supplies available configurations and connections
 type App struct {
-	Config config.Configuration // Configuration file
-	Db     *sql.DB              // Database connection
-	Res    *embed.FS            // Resources from the embedded filesystem
+	Config         config.Configuration // Configuration file
+	Db             *sql.DB              // Database connection
+	Res            *embed.FS            // Resources from the embedded filesystem
+	ScheduledTasks Scheduled            // Scheduled contains a struct of all scheduled functions
 }

app/schedule.go

@@ -0,0 +1,75 @@
+package app
+
+import (
+	"sync"
+	"time"
+)
+
+type Scheduled struct {
+	EveryReboot []func(app *App)
+	EverySecond []func(app *App)
+	EveryMinute []func(app *App)
+	EveryHour   []func(app *App)
+	EveryDay    []func(app *App)
+	EveryWeek   []func(app *App)
+	EveryMonth  []func(app *App)
+	EveryYear   []func(app *App)
+}
+
+type Task struct {
+	Interval time.Duration
+	Funcs    []func(app *App)
+}
+
+func RunScheduledTasks(app *App, poolSize int, stop <-chan struct{}) {
+	// Run every time the server starts
+	for _, f := range app.ScheduledTasks.EveryReboot {
+		f(app)
+	}
+
+	tasks := []Task{
+		{Interval: time.Second, Funcs: app.ScheduledTasks.EverySecond},
+		{Interval: time.Minute, Funcs: app.ScheduledTasks.EveryMinute},
+		{Interval: time.Hour, Funcs: app.ScheduledTasks.EveryHour},
+		{Interval: 24 * time.Hour, Funcs: app.ScheduledTasks.EveryDay},
+		{Interval: 7 * 24 * time.Hour, Funcs: app.ScheduledTasks.EveryWeek},
+		{Interval: 30 * 24 * time.Hour, Funcs: app.ScheduledTasks.EveryMonth},
+		{Interval: 365 * 24 * time.Hour, Funcs: app.ScheduledTasks.EveryYear},
+	}
+
+	// Set up task runners
+	var wg sync.WaitGroup
+	runners := make([]chan bool, len(tasks))
+	for i, task := range tasks {
+		runner := make(chan bool, poolSize)
+		runners[i] = runner
+		wg.Add(1)
+		go func(task Task, runner chan bool) {
+			defer wg.Done()
+			ticker := time.NewTicker(task.Interval)
+			defer ticker.Stop()
+			for {
+				select {
+				case <-ticker.C:
+					for _, f := range task.Funcs {
+						runner <- true
+						go func(f func(app *App)) {
+							defer func() { <-runner }()
+							f(app)
+						}(f)
+					}
+				case <-stop:
+					return
+				}
+			}
+		}(task, runner)
+	}
+
+	// Wait for all goroutines to finish
+	wg.Wait()
+
+	// Close channels
+	for _, runner := range runners {
+		close(runner)
+	}
+}

controllers/postController.go

@@ -3,7 +3,6 @@ package controllers
 import (
 	"GoWeb/app"
 	"GoWeb/models"
-	"GoWeb/security"
 	"log"
 	"net/http"
 	"time"
@@ -15,22 +14,16 @@ type PostController struct {
 }
 
 func (postController *PostController) Login(w http.ResponseWriter, r *http.Request) {
-	// Validate csrf token
-	_, err := security.VerifyCsrfToken(r)
-	if err != nil {
-		log.Println("Error verifying csrf token")
-		return
-	}
-
 	username := r.FormValue("username")
 	password := r.FormValue("password")
+	remember := r.FormValue("remember") == "on"
 
 	if username == "" || password == "" {
 		log.Println("Tried to login user with empty username or password")
 		http.Redirect(w, r, "/login", http.StatusFound)
 	}
 
-	_, err = models.AuthenticateUser(postController.App, w, username, password)
+	_, err := models.AuthenticateUser(postController.App, w, username, password, remember)
 	if err != nil {
 		log.Println("Error authenticating user")
 		log.Println(err)
@@ -42,13 +35,6 @@ func (postController *PostController) Login(w http.ResponseWriter, r *http.Reque
 }
 
 func (postController *PostController) Register(w http.ResponseWriter, r *http.Request) {
-	// Validate csrf token
-	_, err := security.VerifyCsrfToken(r)
-	if err != nil {
-		log.Println("Error verifying csrf token")
-		return
-	}
-
 	username := r.FormValue("username")
 	password := r.FormValue("password")
 	createdAt := time.Now()
@@ -59,7 +45,7 @@ func (postController *PostController) Register(w http.ResponseWriter, r *http.Re
 		http.Redirect(w, r, "/register", http.StatusFound)
 	}
 
-	_, err = models.CreateUser(postController.App, username, password, createdAt, updatedAt)
+	_, err := models.CreateUser(postController.App, username, password, createdAt, updatedAt)
 	if err != nil {
 		log.Println("Error creating user")
 		log.Println(err)

go.mod

@@ -3,6 +3,6 @@ module GoWeb
 go 1.20
 
 require (
-	github.com/lib/pq v1.10.7
-	golang.org/x/crypto v0.7.0
+	github.com/lib/pq v1.10.9
+	golang.org/x/crypto v0.11.0
 )

go.sum

@@ -1,4 +1,4 @@
-github.com/lib/pq v1.10.7 h1:p7ZhMD+KsSRozJr34udlUrhboJwWAgCg34+/ZZNvZZw=
-github.com/lib/pq v1.10.7/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
-golang.org/x/crypto v0.7.0 h1:AvwMYaRytfdeVt3u6mLaxYtErKYjxA2OXjJ1HHq6t3A=
-golang.org/x/crypto v0.7.0/go.mod h1:pYwdfH91IfpZVANVyUOhSIPZaFoJGxTFbZhFTx+dXZU=
+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 v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA=
+golang.org/x/crypto v0.11.0/go.mod h1:xgJhtzW8F9jGdVFWZESrid1U1bjeNy4zgy5cRr/CIio=

main.go

@@ -53,6 +53,12 @@ func main() {
 		}
 	}
 
+	// Assign and run scheduled tasks
+	appLoaded.ScheduledTasks = app.Scheduled{
+		EveryReboot: []func(app *app.App){models.ScheduledSessionCleanup},
+		EveryMinute: []func(app *app.App){models.ScheduledSessionCleanup},
+	}
+
 	// Define Routes
 	routes.GetRoutes(&appLoaded)
 	routes.PostRoutes(&appLoaded)
@@ -70,6 +76,9 @@ func main() {
 	// Wait for interrupt signal and shut down the server
 	interrupt := make(chan os.Signal, 1)
 	signal.Notify(interrupt, os.Interrupt, syscall.SIGTERM)
+	stop := make(chan struct{})
+	go app.RunScheduledTasks(&appLoaded, 100, stop)
+
 	<-interrupt
 	log.Println("Interrupt signal received. Shutting down server...")
 

middleware/csrf.go

@@ -0,0 +1,22 @@
+package middleware
+
+import (
+	"GoWeb/security"
+	"log"
+	"net/http"
+)
+
+// Csrf validates the CSRF token and returns the handler function if it succeded
+func Csrf(f func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		// Verify csrf token
+		_, err := security.VerifyCsrfToken(r)
+		if err != nil {
+			log.Println("Error verifying csrf token")
+			http.Error(w, "Forbidden", http.StatusForbidden)
+			return
+		}
+
+		f(w, r)
+	}
+}

middleware/groups.go

@@ -0,0 +1,5 @@
+package middleware
+
+import "net/http"
+
+type MiddlewareFunc func(f func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request)

middleware/wrapper.go

@@ -0,0 +1,14 @@
+package middleware
+
+import "net/http"
+
+// ProcessGroup is a wrapper function for the http.HandleFunc function
+// that takes the function you want to execute (f) and the middleware you want
+// to execute (m) this should be used when processing multiple groups of middleware at a time
+func ProcessGroup(f func(w http.ResponseWriter, r *http.Request), m []MiddlewareFunc) func(w http.ResponseWriter, r *http.Request) {
+	for _, middleware := range m {
+		_ = middleware(f)
+	}
+
+	return f
+}

models/migrations.go

@@ -22,10 +22,11 @@ func RunAllMigrations(app *app.App) error {
 	}
 
 	session := Session{
-		Id:        1,
-		UserId:    1,
-		AuthToken: "migrate",
-		CreatedAt: time.Now(),
+		Id:         1,
+		UserId:     1,
+		AuthToken:  "migrate",
+		RememberMe: false,
+		CreatedAt:  time.Now(),
 	}
 	err = database.Migrate(app, session)
 	if err != nil {

models/session.go

@@ -10,28 +10,32 @@ import (
 )
 
 type Session struct {
-	Id        int64
-	UserId    int64
-	AuthToken string
-	CreatedAt time.Time
+	Id         int64
+	UserId     int64
+	AuthToken  string
+	RememberMe bool
+	CreatedAt  time.Time
 }
 
-const sessionColumnsNoId = "\"UserId\", \"AuthToken\", \"CreatedAt\""
+const sessionColumnsNoId = "\"UserId\", \"AuthToken\",\"RememberMe\", \"CreatedAt\""
 const sessionColumns = "\"Id\", " + sessionColumnsNoId
 const sessionTable = "public.\"Session\""
 
 const (
-	selectSessionByAuthToken = "SELECT " + sessionColumns + " FROM " + sessionTable + " WHERE \"AuthToken\" = $1"
-	selectAuthTokenIfExists  = "SELECT EXISTS(SELECT 1 FROM " + sessionTable + " WHERE \"AuthToken\" = $1)"
-	insertSession            = "INSERT INTO " + sessionTable + " (" + sessionColumnsNoId + ") VALUES ($1, $2, $3) RETURNING \"Id\""
-	deleteSessionByAuthToken = "DELETE FROM " + sessionTable + " WHERE \"AuthToken\" = $1"
+	selectSessionByAuthToken      = "SELECT " + sessionColumns + " FROM " + sessionTable + " WHERE \"AuthToken\" = $1"
+	selectAuthTokenIfExists       = "SELECT EXISTS(SELECT 1 FROM " + sessionTable + " WHERE \"AuthToken\" = $1)"
+	insertSession                 = "INSERT INTO " + sessionTable + " (" + sessionColumnsNoId + ") VALUES ($1, $2, $3, $4) RETURNING \"Id\""
+	deleteSessionByAuthToken      = "DELETE FROM " + sessionTable + " WHERE \"AuthToken\" = $1"
+	deleteSessionsOlderThan30Days = "DELETE FROM " + sessionTable + " WHERE \"CreatedAt\" < NOW() - INTERVAL '30 days'"
+	deleteSessionsOlderThan6Hours = "DELETE FROM " + sessionTable + " WHERE \"CreatedAt\" < NOW() - INTERVAL '6 hours' AND \"RememberMe\" = false"
 )
 
 // CreateSession creates a new session for a user
-func CreateSession(app *app.App, w http.ResponseWriter, userId int64) (Session, error) {
+func CreateSession(app *app.App, w http.ResponseWriter, userId int64, remember bool) (Session, error) {
 	session := Session{}
 	session.UserId = userId
 	session.AuthToken = generateAuthToken(app)
+	session.RememberMe = remember
 	session.CreatedAt = time.Now()
 
 	// If the AuthToken column for any user matches the token, set existingAuthToken to true
@@ -46,11 +50,11 @@ func CreateSession(app *app.App, w http.ResponseWriter, userId int64) (Session,
 	// If duplicate token found, recursively call function until unique token is generated
 	if existingAuthToken == true {
 		log.Println("Duplicate token found in sessions table, generating new token...")
-		return CreateSession(app, w, userId)
+		return CreateSession(app, w, userId, remember)
 	}
 
 	// Insert session into database
-	err = app.Db.QueryRow(insertSession, session.UserId, session.AuthToken, session.CreatedAt).Scan(&session.Id)
+	err = app.Db.QueryRow(insertSession, session.UserId, session.AuthToken, session.RememberMe, session.CreatedAt).Scan(&session.Id)
 	if err != nil {
 		log.Println("Error inserting session into database")
 		return Session{}, err
@@ -60,6 +64,18 @@ func CreateSession(app *app.App, w http.ResponseWriter, userId int64) (Session,
 	return session, nil
 }
 
+func GetSessionByAuthToken(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)
+	if err != nil {
+		log.Println("Error getting session by auth token")
+		return Session{}, err
+	}
+
+	return session, nil
+}
+
 // Generates a random 64-byte string
 func generateAuthToken(app *app.App) string {
 	// Generate random bytes
@@ -75,13 +91,25 @@ func generateAuthToken(app *app.App) string {
 
 // createSessionCookie creates a new session cookie
 func createSessionCookie(app *app.App, w http.ResponseWriter, session Session) {
-	cookie := &http.Cookie{
-		Name:     "session",
-		Value:    session.AuthToken,
-		Path:     "/",
-		MaxAge:   86400,
-		HttpOnly: true,
-		Secure:   true,
+	cookie := &http.Cookie{}
+	if session.RememberMe {
+		cookie = &http.Cookie{
+			Name:     "session",
+			Value:    session.AuthToken,
+			Path:     "/",
+			MaxAge:   2592000 * 1000, // 30 days in ms
+			HttpOnly: true,
+			Secure:   true,
+		}
+	} else {
+		cookie = &http.Cookie{
+			Name:     "session",
+			Value:    session.AuthToken,
+			Path:     "/",
+			MaxAge:   21600 * 1000, // 6 hours in ms
+			HttpOnly: true,
+			Secure:   true,
+		}
 	}
 
 	http.SetCookie(w, cookie)
@@ -112,3 +140,22 @@ func DeleteSessionByAuthToken(app *app.App, w http.ResponseWriter, authToken str
 
 	return nil
 }
+
+// ScheduledSessionCleanup deletes expired sessions from the database
+func ScheduledSessionCleanup(app *app.App) {
+	// Delete sessions older than 30 days (remember me sessions)
+	_, err := app.Db.Exec(deleteSessionsOlderThan30Days)
+	if err != nil {
+		log.Println("Error deleting 30 day expired sessions from database")
+		log.Println(err)
+	}
+
+	// Delete sessions older than 6 hours
+	_, err = app.Db.Exec(deleteSessionsOlderThan6Hours)
+	if err != nil {
+		log.Println("Error deleting 6 hour expired sessions from database")
+		log.Println(err)
+	}
+
+	log.Println("Deleted expired sessions from database")
+}

models/user.go

@@ -23,10 +23,9 @@ const userColumns = "\"Id\", " + userColumnsNoId
 const userTable = "public.\"User\""
 
 const (
-	selectSessionIdByAuthToken = "SELECT \"Id\" FROM public.\"Session\" WHERE \"AuthToken\" = $1"
-	selectUserById             = "SELECT " + userColumns + " FROM " + userTable + " WHERE \"Id\" = $1"
-	selectUserByUsername       = "SELECT " + userColumns + " FROM " + userTable + " WHERE \"Username\" = $1"
-	insertUser                 = "INSERT INTO " + userTable + " (" + userColumnsNoId + ") VALUES ($1, $2, $3, $4) RETURNING \"Id\""
+	selectUserById       = "SELECT " + userColumns + " FROM " + userTable + " WHERE \"Id\" = $1"
+	selectUserByUsername = "SELECT " + userColumns + " FROM " + userTable + " WHERE \"Username\" = $1"
+	insertUser           = "INSERT INTO " + userTable + " (" + userColumnsNoId + ") VALUES ($1, $2, $3, $4) RETURNING \"Id\""
 )
 
 // GetCurrentUser finds the currently logged-in user by session cookie
@@ -37,16 +36,13 @@ func GetCurrentUser(app *app.App, r *http.Request) (User, error) {
 		return User{}, err
 	}
 
-	var userId int64
-
-	// Query row by AuthToken
-	err = app.Db.QueryRow(selectSessionIdByAuthToken, cookie.Value).Scan(&userId)
+	session, err := GetSessionByAuthToken(app, cookie.Value)
 	if err != nil {
-		log.Println("Error querying session row with session: " + cookie.Value)
+		log.Println("Error getting session by auth token")
 		return User{}, err
 	}
 
-	return GetUserById(app, userId)
+	return GetUserById(app, session.UserId)
 }
 
 // GetUserById finds a User table row in the database by id and returns a struct representing this row
@@ -98,7 +94,7 @@ func CreateUser(app *app.App, username string, password string, createdAt time.T
 }
 
 // AuthenticateUser validates the password for the specified user
-func AuthenticateUser(app *app.App, w http.ResponseWriter, username string, password string) (Session, error) {
+func AuthenticateUser(app *app.App, w http.ResponseWriter, username string, password string, remember bool) (Session, error) {
 	var user User
 
 	// Query row by username
@@ -114,7 +110,7 @@ func AuthenticateUser(app *app.App, w http.ResponseWriter, username string, pass
 		log.Println("Authentication error (incorrect password) for user:" + username)
 		return Session{}, err
 	} else {
-		return CreateSession(app, w, user.Id)
+		return CreateSession(app, w, user.Id, remember)
 	}
 }
 
@@ -133,14 +129,4 @@ func LogoutUser(app *app.App, w http.ResponseWriter, r *http.Request) {
 		log.Println("Error deleting session by AuthToken")
 		return
 	}
-
-	// Delete cookie
-	cookie = &http.Cookie{
-		Name:   "session",
-		Value:  "",
-		Path:   "/",
-		MaxAge: -1,
-	}
-
-	http.SetCookie(w, cookie)
 }

restclient/client.go

@@ -0,0 +1,57 @@
+package restclient
+
+import (
+	"bytes"
+	"encoding/json"
+	"mime/multipart"
+	"net/http"
+)
+
+// SendRequest sends an HTTP request to a URL and includes the specified headers and body.
+// A body can be nil for GET requests, a map[string]string for multipart/form-data requests,
+// or a struct for JSON requests
+func SendRequest(url string, method string, headers map[string]string, body interface{}) (http.Response, error) {
+	var reqBody *bytes.Buffer
+	var contentType string
+
+	switch v := body.(type) {
+	case nil:
+		reqBody = bytes.NewBuffer([]byte(""))
+	case map[string]string:
+		reqBody = &bytes.Buffer{}
+		writer := multipart.NewWriter(reqBody)
+		for key, value := range v {
+			writer.WriteField(key, value)
+		}
+		writer.Close()
+		contentType = writer.FormDataContentType()
+	default:
+		jsonBody, err := json.Marshal(body)
+		if err != nil {
+			return http.Response{}, err
+		}
+		reqBody = bytes.NewBuffer(jsonBody)
+		contentType = "application/json"
+	}
+
+	req, err := http.NewRequest(method, url, reqBody)
+	if err != nil {
+		return http.Response{}, err
+	}
+
+	if contentType != "" {
+		req.Header.Set("Content-Type", contentType)
+	}
+
+	for key, value := range headers {
+		req.Header.Add(key, value)
+	}
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return http.Response{}, err
+	}
+
+	return *resp, nil
+}

routes/postRoutes.go

@@ -3,6 +3,7 @@ package routes
 import (
 	"GoWeb/app"
 	"GoWeb/controllers"
+	"GoWeb/middleware"
 	"net/http"
 )
 
@@ -14,6 +15,6 @@ func PostRoutes(app *app.App) {
 	}
 
 	// User authentication
-	http.HandleFunc("/register-handle", postController.Register)
-	http.HandleFunc("/login-handle", postController.Login)
+	http.HandleFunc("/register-handle", middleware.Csrf(postController.Register))
+	http.HandleFunc("/login-handle", middleware.Csrf(postController.Login))
 }

templates/pages/login.html

@@ -10,6 +10,8 @@
         <input id="username" name="username" type="text" placeholder="John"><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 type="submit" value="Submit">
     </form>
 </div>