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|
package main
import (
"errors"
"fmt"
"net/http"
"github.com/alexedwards/argon2id"
"github.com/jackc/pgx/v5"
)
func handle_login(w http.ResponseWriter, r *http.Request, params map[string]any) {
if r.Method != "POST" {
err := templates.ExecuteTemplate(w, "login", params)
if err != nil {
fmt.Fprintln(w, "Error rendering template:", err.Error())
}
return
}
var user_id int
username := r.PostFormValue("username")
password := r.PostFormValue("password")
var password_hash string
err := database.QueryRow(r.Context(), "SELECT id, password FROM users WHERE username = $1", username).Scan(&user_id, &password_hash)
if err != nil {
if errors.Is(err, pgx.ErrNoRows) {
params["login_error"] = "Unknown username"
err := templates.ExecuteTemplate(w, "login", params)
if err != nil {
fmt.Fprintln(w, "Error rendering template:", err.Error())
}
return
}
fmt.Fprintln(w, "Error querying user information:", err.Error())
return
}
match, err := argon2id.ComparePasswordAndHash(password, password_hash)
if err != nil {
fmt.Fprintln(w, "Error comparing password and hash:", err.Error())
return
}
if !match {
params["login_error"] = "Invalid password"
err := templates.ExecuteTemplate(w, "login", params)
if err != nil {
fmt.Fprintln(w, "Error rendering template:", err.Error())
return
}
return
}
}
|
