Hello Guys,
I just build this golang website the DB connection works and session are getting loged and the login is working but the redirect to booking doesnt work. are you guys able to help me i dont know whats going wrong. It just loads the login again and doesnt redirect, further debugging doesnt seem te give me anything.
Github: GitHub - KSCHNAPPIEN/golang-web
package main
import (
“database/sql”
“encoding/json”
“fmt”
“io/ioutil”
“log”
“net/http”
“os”
_ "github.com/go-sql-driver/mysql"
)
type DatabaseConfig struct {
Username string json:"user"
Password string json:"password"
Host string json:"host"
Port int json:"port"
Database string json:"dbname"
}
var dbc string
func logError(err error) {
if err != nil {
log.Println(err)
}
}
func main() {
logFile, err := os.OpenFile(“errors.log”, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
if err != nil {
log.Println(err)
}
defer logFile.Close()
log.SetOutput(logFile)
mux := http.NewServeMux()
// route naar url
mux.HandleFunc("/", RootHandler)
mux.HandleFunc("/Locatie", LocatieHandler)
mux.HandleFunc("/Login", LoginHandler)
mux.HandleFunc("/Booking", BookingHandler)
// read json file
configBytes, err := ioutil.ReadFile("Db.json")
if err != nil {
logError(err)
}
// setting up new struct
var config DatabaseConfig
if err := json.Unmarshal(configBytes, &config); err != nil {
log.Println(err)
}
// make connection database
dbc = fmt.Sprintf("%s:%s@tcp(%s:%d)/%s", config.Username, config.Password, config.Host, config.Port, config.Database)
db, err := sql.Open("mysql", dbc)
if err != nil {
logError(err)
}
defer db.Close()
if err := db.Ping(); err != nil {
log.Println(err)
}
http.ListenAndServe(":8080", mux)
}
func checkLogin(r *http.Request) bool {
// get usename and password
username := r.FormValue(“username”)
password := r.FormValue(“password”)
// Connect to the database
db, err := sql.Open("mysql", dbc)
if err != nil {
log.Println(err)
return false
}
defer db.Close()
// Execute a SELECT query to check if the username and password are correct
var userID int
err = db.QueryRow("SELECT id FROM users WHERE username=? AND password=?", username, password).Scan(&userID)
if err != nil {
log.Println(err)
return false
}
// If the username and password are correct, insert a new session into the database
_, err = db.Exec("INSERT INTO sessions (user_id, start_time, end_time) VALUES (?, NOW(), NOW())", userID)
if err != nil {
log.Println(err)
return false
}
return true
}
func RootHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, <h1>Fonteyn Vakantieparken</h1> <p>Vakantie parken voor een onvergeetelijke vakantie.</p> <ul> <li><a href="/Locatie">Locatie</a></li> <li><a href="/Login">Login</a></li> </ul> )
}
func LocatieHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, <h1>Locatie</h1> <p>Wij zijn beschikbaar in meerder landen.</p> <ul> <li><a href="/">Home</a></li> <li><a href="/Login">Login</a></li> </ul> )
}
func BookingHandler(w http.ResponseWriter, r *http.Request) {
// Check if user is logged in
if !checkLogin(r) {
http.Redirect(w, r, “/Login”, http.StatusSeeOther)
return
}
}
func LoginHandler(w http.ResponseWriter, r *http.Request) {
// display login
fmt.Fprintln(w, <h1>Fonteyn Vakantieparken</h1> <h2>Inloggen</h2> <form action="/Login" method="POST"> <label for="username">Gebruikersnaam:</label><br> <input type="text" id="username" name="username"><br> <label for="password">Wachtwoord:</label><br> <input type="password" id="password" name="password"><br><br> <input type="submit" value="Inloggen"> </form> )
if r.Method == “POST” {
if checkLogin(r) {
http.Redirect(w, r, “/Booking”, http.StatusSeeOther)
return
} else {
fmt.Fprintln(w, “Invalid username or password.”)
}
}
}