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using MySqlConnector;
using System.Security.Cryptography;
using System.Text;
var SK_DB = "db-cred";
var SK_LOGGED = "logged-in";
var builder = WebApplication.CreateBuilder(new WebApplicationOptions
{
Args = args,
WebRootPath = "frontend/dist"
});
builder.Services.AddDistributedMemoryCache();
builder.Services.AddSession(options =>
{
options.Cookie.HttpOnly = true;
options.Cookie.IsEssential = true;
});
var app = builder.Build();
var connection = new MySqlConnection();
app.UseStaticFiles();
app.UseRouting();
app.UseSession();
app.MapPost("/login", (LoginForm lgf, HttpResponse response, HttpContext context) =>
{
var pass = hashPassword(lgf.password!);
connection = new MySqlConnection(context.Session.GetString(SK_DB));
connection.Open();
var command = new MySqlCommand(null, connection);
if (lgf.mode == "login")
{
command.CommandText = "SELECT * FROM user WHERE login = @login AND password = @password;";
command.Parameters.AddWithValue("@login", lgf.login);
command.Parameters.AddWithValue("@password", pass);
var reader = command.ExecuteReader();
while (reader.Read())
{
context.Session.SetString(SK_LOGGED, "true");
connection.Close();
return "ok";
}
}
else
{
Console.WriteLine("registering");
command.CommandText = "INSERT INTO user (email, login, password) VALUES (@email, @login, @password)";
command.Parameters.AddWithValue("@login", lgf.login);
command.Parameters.AddWithValue("@password", pass);
command.Parameters.AddWithValue("@email", lgf.email);
command.ExecuteNonQuery();
connection.Close();
return "ok";
}
connection.Close();
return "error";
});
app.MapPost("/check-db", async (DbForm dbf, HttpResponse response, HttpContext context) =>
{
try
{
var connstr = $"server={dbf.server};port={dbf.port};user={dbf.user};password={dbf.password};database={dbf.database}";
var conn = new MySqlConnection(connstr);
Console.WriteLine(connstr);
await conn.OpenAsync();
connection = conn;
await conn.CloseAsync();
context.Session.SetString(SK_DB, connstr);
return "ok";
}
catch (Exception _)
{
return "error";
}
});
app.MapMethods("/check-db", new[] { "OPTIONS" }, (HttpResponse response) =>
{
response.Headers.AccessControlAllowOrigin = "*";
response.Headers.AccessControlAllowHeaders = "*";
return "ok";
});
app.MapGet("/", (HttpContext context) =>
{
context.Response.SendFileAsync("./frontend/dist/index.html");
});
app.MapPost("/book", (Book book, HttpContext context) =>
{
if (!checkRequest(context)) return "error";
connection.Open();
var command = new MySqlCommand(null, connection);
if (book.id == null)
{
command.CommandText = "INSERT INTO book (author, title, year, publisher, isbn, format, pages, description) VALUES (@author, @title, @year, @publisher, @isbn, @format, @pages, @description)";
}
else
{
command.CommandText = "UPDATE book SET author = @author, title = @title, year = @year, publisher = @publisher, isbn = @isbn, format = @format, pages = @pages, description = @description WHERE id = @id";
command.Parameters.AddWithValue("@id", book.id);
}
command.Parameters.AddWithValue("@author", book.author);
command.Parameters.AddWithValue("@title", book.title);
command.Parameters.AddWithValue("@year", MySqlDbType.Int32).Value = book.year;
command.Parameters.AddWithValue("@publisher", book.publisher);
command.Parameters.AddWithValue("@isbn", book.isbn);
command.Parameters.AddWithValue("@format", book.format);
command.Parameters.AddWithValue("@pages", book.pages);
command.Parameters.AddWithValue("@description", book.description);
command.ExecuteNonQuery();
connection.Close();
return "ok";
});
app.MapGet("/books", (HttpContext context) =>
{
if (!checkRequest(context)) return Results.Ok("error");
connection.Open();
var command = new MySqlCommand("SELECT * FROM book;", connection);
var reader = command.ExecuteReader();
List<Dictionary<string, string>> books = new List<Dictionary<string, string>>();
while (reader.Read())
{
Dictionary<string, string> book = new Dictionary<string, string>();
book.Add("id", reader.GetValue(0).ToString() ?? "");
book.Add("author", reader.GetValue(1).ToString() ?? "");
book.Add("title", reader.GetValue(2).ToString() ?? "");
book.Add("year", reader.GetValue(3).ToString() ?? "");
book.Add("publisher", reader.GetValue(4).ToString() ?? "");
book.Add("isbn", reader.GetValue(5).ToString() ?? "");
book.Add("format", reader.GetValue(6).ToString() ?? "");
book.Add("pages", reader.GetValue(7).ToString() ?? "");
book.Add("description", reader.GetValue(8).ToString() ?? "");
books.Add(book);
}
connection.Close();
return Results.Json(books);
});
// Remove book
app.MapDelete("/book", (HttpContext context) =>
{
if (!checkRequest(context)) return Results.Unauthorized();
connection.Open();
var command = new MySqlCommand(null, connection);
command.CommandText = "DELETE FROM book WHERE id = @id;";
command.Parameters.AddWithValue("@id", MySqlDbType.Int32).Value = Int32.Parse(context.Request.Query["bid"]);
command.ExecuteNonQuery();
connection.Close();
return Results.Ok("ok");
});
app.Run("http://localhost:8000");
String hashPassword(string pass)
{
var sha256 = SHA256.Create();
return BitConverter.ToString(sha256.ComputeHash(Encoding.UTF8.GetBytes(pass!)));
}
Boolean checkRequest(HttpContext context)
{
return context.Session.GetString(SK_LOGGED) == "true";
}
class DbForm
{
public string? server { get; set; }
public int port { get; set; }
public string? database { get; set; }
public string? user { get; set; }
public string? password { get; set; }
}
class LoginForm
{
public string? email { get; set; }
public string? login { get; set; }
public string? password { get; set; }
public string? mode { get; set; }
}
class Book
{
public int? id { get; set; }
public string? author { get; set; }
public string? title { get; set; }
public int? year { get; set; }
public string? publisher { get; set; }
public string? isbn { get; set; }
public string? format { get; set; }
public int? pages { get; set; }
public string? description { get; set; }
}
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