Fixed requirements with email

README.md

@@ -1,11 +1,24 @@
 # ThePlaceHolders
-"UTSA Place" Collaborate website canvas that allows students to place a pixel within a restrcited amount of time to make art.
+"UTSA Place" Collaborate website canvas that allows students to place a pixel
+within a restricted amount of time to make art.
 
-Users Connected (testing if working):
-Adan Santos
-Jackson Sovilay
-Hello
-Alex Rivera
-Hello
-Testing
-Test push
+## How to run
+1. Install [Go](https://go.dev/dl/)
+2. Run the command `go run .` inside this folder
+3. View the website at [127.0.0.1:8080](http://127.0.0.1:8080/)
+
+## Go project structure
+* [go.mod](go.mod) Go version and library dependencies
+* [go.sum](go.sum) Checksums for libraries
+
+## Backend Source
+Our back-end is written in [Go](https://go.dev/) using the standard library.
+* [Request handling](server.go)
+* [User registration/login](users.go)
+
+## Frontend Source
+Our front-end is written in vanilla JavaScript, using the [Bootstrap](https://getbootstrap.com/)
+CSS framework.
+* [Main page](static/index.html)
+* [Login page](static/login.html)
+* [Registration page](static/register.html)

go.mod

@@ -1,3 +1,10 @@
 module github.com/adanrsantos/ThePlaceHolders
 
-go 1.23.1
+go 1.23
+
+require (
+	github.com/gorilla/sessions v1.4.0
+	golang.org/x/crypto v0.27.0
+)
+
+require github.com/gorilla/securecookie v1.1.2 // indirect

go.sum

@@ -0,0 +1,8 @@
+github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0=
+github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/gorilla/securecookie v1.1.2 h1:YCIWL56dvtr73r6715mJs5ZvhtnY73hBvEF8kXD8ePA=
+github.com/gorilla/securecookie v1.1.2/go.mod h1:NfCASbcHqRSY+3a8tlWJwsQap2VX5pwzwo4h3eOamfo=
+github.com/gorilla/sessions v1.4.0 h1:kpIYOp/oi6MG/p5PgxApU8srsSw9tuFbt46Lt7auzqQ=
+github.com/gorilla/sessions v1.4.0/go.mod h1:FLWm50oby91+hl7p/wRxDth9bWSuk0qVL2emc7lT5ik=
+golang.org/x/crypto v0.27.0 h1:GXm2NjJrPaiv/h1tb2UH8QfgC/hOf/+z0p6PT8o1w7A=
+golang.org/x/crypto v0.27.0/go.mod h1:1Xngt8kV6Dvbssa53Ziq6Eqn0HqbZi5Z6R0ZpwQzt70=

server.go

@@ -2,57 +2,48 @@ package main
 
 import (
 	"fmt"
+	"log"
 	"net/http"
+
+	"github.com/gorilla/sessions"
 )
 
 const ADDRESS = "127.0.0.1"
 const PORT = "8080"
 
-type UserForm struct {
-	Email    string
-	Password string
-}
-
-func extract_user_data(r *http.Request) UserForm {
-	return UserForm{
-		Email:    r.FormValue("email"),
-		Password: r.FormValue("password"),
-	}
-}
-
-func handle_login(w http.ResponseWriter, r *http.Request) {
-	if r.Method != http.MethodPost {
-		return
-	}
-	data := extract_user_data(r)
-	fmt.Fprintln(w, data.Email)
-	fmt.Fprintln(w, data.Password)
-}
-
-func handle_register(w http.ResponseWriter, r *http.Request) {
-	if r.Method != http.MethodPost {
-		return
-	}
-	data := extract_user_data(r)
-	fmt.Fprintln(w, data.Email)
-	fmt.Fprintln(w, data.Password)
+type Server struct {
+	// Registered user information
+	Users map[string]UserData
+	// Login sessions
+	Sessions *sessions.CookieStore
 }
 
 func main() {
+	// Create server object
+	secret := []byte("super-secret-key")
+	server := Server{
+		Users:    make(map[string]UserData),
+		Sessions: sessions.NewCookieStore(secret),
+	}
 	// Host static files
 	static_files := http.FileServer(http.Dir("static/"))
 	http.Handle("/", static_files)
-
-	// Response generated by code
-	http.HandleFunc("/handle-register", handle_register)
-	http.HandleFunc("/handle-login", handle_login)
-
+	// Redirect .html to clean URL
+	http.Handle("/register.html", http.RedirectHandler("/register", 301))
+	http.Handle("/login.html", http.RedirectHandler("/login", 301))
+	// Handle user authentication
+	http.HandleFunc("/register", server.handle_register)
+	http.HandleFunc("/login", server.handle_login)
+	http.HandleFunc("/logout", func(w http.ResponseWriter, r *http.Request) {
+		server.handle_logout(w, r)
+		http.Redirect(w, r, "/", http.StatusFound)
+	})
 	// Start web server at 127.0.0.1:8080
-	e := http.ListenAndServe(ADDRESS+":"+PORT, nil)
+	fmt.Printf("Listening to %s on port %s...\n", ADDRESS, PORT)
+	err := http.ListenAndServe(ADDRESS+":"+PORT, nil)
 	// Print any errors
-	if e != nil {
-		fmt.Println(e)
-	} else {
-		fmt.Println("Started server successfully")
+	if err != nil {
+		fmt.Println("Error starting server:")
+		log.Fatal(err)
 	}
 }

static/index.html

@@ -20,6 +20,9 @@
     <li>
       <a href="/login.html"> Login </a>
     </li>
+    <li>
+      <a href="/logout"> Log Out </a>
+    </li>
   </ul>
   </body>
 </html>

static/login.html

@@ -9,5 +9,26 @@
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script>
   </head>
   <body>
+    <div class="d-flex p-2 justify-content-center">
+    <form method = "post">
+      <div class="mb-3">
+        <label for="exampleInputEmail1" class="form-label">Email address</label>
+        <input type="email" name="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
+        <div id="emailHelp" class="form-text">We'll never share your email with anyone else.</div>
+      </div>
+      <div class="mb-3">
+        <label for="exampleInputPassword1" class="form-label">Password</label>
+        <input type="password" name="password" class="form-control" id="exampleInputPassword1">
+      </div>
+      <div class="mb-3 form-check">
+        <input type="checkbox" class="form-check-input" id="exampleCheck1">
+        <label class="form-check-label" for="exampleCheck1">Show Password</label>
+      </div>
+      <input type="submit" class="btn btn-primary" value="Submit">
+      <div class="fs-6">
+        Don't have an account? Register <a href="register.html">here</a>.
+      </div>
+    </form>
+    </div>
   </body>
 </html>

static/register.html

@@ -10,15 +10,20 @@
   </head>
   <body>
     <div class="d-flex p-2 justify-content-center align-items-center">
-    <form action="/handle-register" method="post">
+    <form method="post">
       <div class="mb-3">
+<<<<<<< HEAD
         <label for="exampleInputEmail1" class="form-label">Email address</label>
         <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp" required>
+=======
+        <label for="email" class="form-label">Email address</label>
+        <input type="email" class="form-control" id="email" name="email" aria-describedby="emailHelp">
+>>>>>>> c160c57da5e2a70b406ce21fd0d3b48efdc62b36
         <div id="emailHelp" class="form-text">We'll never share your email with anyone else.</div>
       </div>
       <div class="mb-3">
-        <label for="exampleInputPassword1" class="form-label">Password</label>
-        <input type="password" class="form-control" id="exampleInputPassword1" required>
+        <label for="password" class="form-label">Password</label>
+        <input type="password" class="form-control" id="password" name="password" required>
       </div>
       <div class="mb-3 form-check">
         <input type="checkbox" class="form-check-input" id="exampleCheck1">

users.go

@@ -0,0 +1,152 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"regexp"
+	"strings"
+	"time"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+const SESSION_COOKIE_NAME = "utsa-place-session"
+const SESSION_AUTH = "auth"
+const SESSION_STARTED = "age"
+
+const ENCRYPTION_STRENGTH = 14
+
+type UserData struct {
+	Email          string
+	Password       string
+	AccountCreated time.Time
+	LastLogin      time.Time
+}
+
+func validate_email(email string) (string, bool) {
+	email = strings.ToLower(email)
+	regex := regexp.MustCompile("^[a-z]+.[a-z]+@(my.)?utsa.edu")
+	ok := regex.MatchString(email)
+	return email, ok
+}
+
+// Encrypts a password
+func hash_password(password string) string {
+	bytes, _ := bcrypt.GenerateFromPassword([]byte(password), ENCRYPTION_STRENGTH)
+	return string(bytes)
+}
+
+// Compares an unencrpyted password to an encrypted password
+func check_password_hash(password string, hash string) bool {
+	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+	return err == nil
+}
+
+// Handles requests to /login.html
+func (s *Server) handle_login(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case http.MethodGet:
+		http.ServeFile(w, r, "./static/login.html")
+	case http.MethodPost:
+		// Get data from form
+		email := r.FormValue("email")
+		password := r.FormValue("password")
+		// Get user from database
+		user, ok := s.Users[email]
+		// If user does not exist
+		if !ok {
+			http.Error(w, "User not found", http.StatusForbidden)
+			return
+		}
+		// If password does not match
+		if !check_password_hash(password, user.Password) {
+			http.Error(w, "Passwords dont match", http.StatusForbidden)
+			return
+		}
+		// Generate session
+		session, err := s.Sessions.Get(r, SESSION_COOKIE_NAME)
+		if err != nil {
+			s.handle_logout(w, r)
+			http.Error(w, "Invalid session", http.StatusUnauthorized)
+			return
+		}
+		now := time.Now()
+		session.Values[SESSION_AUTH] = true
+		session.Values[SESSION_STARTED] = now
+		session.Save(r, w)
+		// Update last-login on DB
+		user.LastLogin = now
+		s.Users[email] = user
+		// Redirect to index.html
+		fmt.Println("Logged in user: ", email)
+		http.Redirect(w, r, "/", http.StatusFound)
+	default:
+		http.Error(w, "Forbidden", http.StatusForbidden)
+	}
+}
+
+// Handles requests to /register.html
+func (s *Server) handle_register(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case http.MethodGet:
+		http.ServeFile(w, r, "./static/register.html")
+	case http.MethodPost:
+		// Get data from form
+		email, ok := validate_email(r.FormValue("email"))
+		if !ok {
+			http.Error(w, "Invalid email address", http.StatusForbidden)
+			return
+		}
+		password := r.FormValue("password")
+		if len(password) < 8 || len(password) >= 70 {
+			http.Error(w, "Invalid password length", http.StatusForbidden)
+			return
+		}
+		// Check that this email is not already registered
+		if _, ok := s.Users[email]; ok {
+			http.Error(w, "Already registered", http.StatusForbidden)
+			return
+		}
+		// Generate session
+		session, err := s.Sessions.Get(r, SESSION_COOKIE_NAME)
+		// If session cookie invalid
+		if err != nil {
+			s.handle_logout(w, r)
+			http.Error(w, "Invalid session", http.StatusUnauthorized)
+			return
+		}
+		now := time.Now()
+		// Save user information to DB
+		s.Users[email] = UserData{
+			Email:          email,
+			Password:       hash_password(password),
+			AccountCreated: now,
+			LastLogin:      now,
+		}
+		// Make session valid
+		session.Values[SESSION_AUTH] = true
+		session.Values[SESSION_STARTED] = now
+		// Send session token to browser
+		session.Save(r, w)
+		// Redirect to index.html
+		fmt.Println("Registered user: ", email)
+		http.Redirect(w, r, "/", http.StatusFound)
+	default:
+		http.Error(w, "Forbidden", http.StatusForbidden)
+	}
+}
+
+func (s *Server) handle_logout(w http.ResponseWriter, r *http.Request) {
+	// If session exists
+	if session, err := s.Sessions.Get(r, SESSION_COOKIE_NAME); err == nil {
+		// Remove authorization
+		session.Values[SESSION_AUTH] = false
+		session.Save(r, w)
+	}
+	// Remove session cookie
+	http.SetCookie(w, &http.Cookie{
+		Name: SESSION_COOKIE_NAME,
+		// Negative max age immediately removes the cookie
+		MaxAge: -1,
+	})
+}