private void HandleLogin(HttpListenerContext context)
{
LoginRequest request;
try
{
request = RestMethods.ReadBody <LoginRequest>(context.Request);
}
catch (ArgumentException e)
{
RestMethods.WriteError(context.Response, HttpStatusCode.BadRequest, e.Message);
return;
}
if (_usernames.TryGetValue(request.Username, out int id))
{
if (_users[id].Online)
{
context.Response.AppendHeader(HttpResponseHeader.WwwAuthenticate.ToString(), "Token realm = 'Username is already in use'");
RestMethods.WriteError(context.Response, HttpStatusCode.Unauthorized, "username is already in use");
return;
}
else
{
_users.TryRemove(id, out _);
_usernames.TryRemove(request.Username, out id);
_tokens.TryRemove(_tokens.First(tokenId => tokenId.Value == id).Key, out id);
}
}
lock (this)
{
id = ++_userId;
}
var token = Convert.ToBase64String(Guid.NewGuid().ToByteArray());
var loginResponse = new LoginResponse
{
Username = request.Username,
Id = id,
Online = true,
Token = token
};
lock (_usernames)
{
if (!_usernames.TryAdd(loginResponse.Username, id))
{
context.Response.AppendHeader(HttpResponseHeader.WwwAuthenticate.ToString(), "Token realm = 'Username is already in use'");
RestMethods.WriteError(context.Response, HttpStatusCode.Unauthorized, "username is already in use");
}
_users.TryAdd(id, new User
{
Username = loginResponse.Username,
Id = id,
Online = true
});
_tokens.TryAdd(token, id);
}
CountAndDecrement(_userEvent);
RestMethods.WriteToResponse(context.Response, loginResponse);
}
