site.go
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package main
import (
"fmt"
"net/http"
"strings"
"git.j3s.sh/feeds.gay/auth"
"git.j3s.sh/feeds.gay/sqlite"
"golang.org/x/crypto/bcrypt"
)
type Site struct {
// title of the website
title string
// site database handle
db *sqlite.DB
}
// New returns a fully populated & ready for action Site
func New() *Site {
title := "feeds.gay"
s := Site{
title: title,
db: sqlite.New(title + ".db"),
}
return &s
}
func (s *Site) indexHandler(w http.ResponseWriter, r *http.Request) {
if !methodAllowed(w, r, "GET") {
return
}
if s.loggedIn(r) {
fmt.Fprintf(w, `<!DOCTYPE html>
<title>%s</title>
<p> { %s <a href=/logout>logout</a> }`, s.title, s.username(r))
} else {
fmt.Fprintf(w, `<!DOCTYPE html>
<title>%s</title>
<a href="/login">login</a>`, s.title)
}
}
func (s *Site) loginHandler(w http.ResponseWriter, r *http.Request) {
if !methodAllowed(w, r, "GET", "POST") {
return
}
if r.Method == "GET" {
if s.loggedIn(r) {
fmt.Fprintf(w, "you are already logged in :3\n")
} else {
fmt.Fprintf(w, `<!DOCTYPE html>
<pre>login</pre>
<form method="POST" action="/login">
<label for="username">username:</label>
<input type="text" name="username" required><br>
<label for="password">password:</label>
<input type="password" name="password" required><br>
<input type="submit" value="login">
</form>
<p>if you want to register a new account, click the tree:
<a href="/register">🌳</a>`)
}
}
if r.Method == "POST" {
username := r.FormValue("username")
password := r.FormValue("password")
err := s.login(w, username, password)
if err != nil {
fmt.Fprintf(w, `<!DOCTYPE html>
<p>⚠️ incorrect username/password ⚠️
<p>to register a new account, click the skull:
<a href="/register">💀</a>`)
return
}
http.Redirect(w, r, "/", http.StatusSeeOther)
}
}
// TODO: make this take a POST only in accordance w/ some spec
func (s *Site) logoutHandler(w http.ResponseWriter, r *http.Request) {
if !methodAllowed(w, r, "GET", "POST") {
return
}
http.SetCookie(w, &http.Cookie{
Name: "session_token",
Value: "",
})
http.Redirect(w, r, "/", http.StatusSeeOther)
}
func (s *Site) registerHandler(w http.ResponseWriter, r *http.Request) {
if !methodAllowed(w, r, "GET", "POST") {
return
}
if r.Method == "GET" {
fmt.Fprintf(w, `<!DOCTYPE html>
<pre>register</pre>
<form method="POST" action="/register">
<label for="username">username:</label>
<input type="text" name="username" required><br>
<label for="password">password:</label>
<input type="password" name="password" required><br>
<input type="submit" value="login">
</form>`)
}
if r.Method == "POST" {
username := r.FormValue("username")
password := r.FormValue("password")
err := s.register(username, password)
if err != nil {
internalServerError(w, "failed to register user")
return
}
err = s.login(w, username, password)
if err != nil {
internalServerError(w, "extremely weird login error")
return
}
http.Redirect(w, r, "/", http.StatusSeeOther)
}
}
func (s *Site) userHandler(w http.ResponseWriter, r *http.Request) {
if !methodAllowed(w, r, "GET") {
return
}
username := strings.TrimPrefix(r.URL.Path, "/")
fmt.Fprintf(w, `<!DOCTYPE html>
<p>%s's feeds:`, username)
// feeds := s.db.GetFeeds(username)
// for _, feed := range feeds {
// fmt.Fprintf(w, "<p>%s", feed)
// }
// print the list of feeds
// if s.loggedIn(r) {
// // TODO: render user template
// } else {
// // TODO: render user template
// }
// fmt.Fprintf(w, `<!DOCTYPE html>
//
// <title>%s</title>
// <p> { %s <a href=/logout>logout</a> }`, s.title, s.username(r))
//
// fmt.Fprintf(w, `<!DOCTYPE html>
//
// <title>%s</title>
// <a href="/login">login</a>`, s.title)
}
// username fetches a client's username based
// on the sessionToken that user has set. username
// will return "" if there is no sessionToken.
func (s *Site) username(r *http.Request) string {
sessionToken, err := r.Cookie("session_token")
if err != nil {
return ""
}
username := s.db.GetUsernameBySessionToken(sessionToken.Value)
return username
}
func (s *Site) loggedIn(r *http.Request) bool {
if s.username(r) == "" {
return false
}
return true
}
// login compares the sqlite password field against the user supplied password and
// sets a session token against the supplied writer.
func (s *Site) login(w http.ResponseWriter, username string, password string) error {
storedPassword := s.db.GetPassword(username)
if storedPassword == "" {
return fmt.Errorf("blank stored password")
}
if username == "" {
return fmt.Errorf("username cannot be nil")
}
if password == "" {
return fmt.Errorf("password cannot be nil")
}
err := bcrypt.CompareHashAndPassword([]byte(storedPassword), []byte(password))
if err != nil {
return fmt.Errorf("invalid password")
}
sessionToken := auth.GenerateSessionToken()
s.db.SetSessionToken(username, sessionToken)
http.SetCookie(w, &http.Cookie{
Name: "session_token",
Value: sessionToken,
})
return nil
}
func (s *Site) register(username string, password string) error {
hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
if err != nil {
return err
}
s.db.AddUser(username, string(hashedPassword))
return nil
}