yannbriancon

from django.contrib import auth
from django.contrib.auth.middleware import MiddlewareMixin
from django.http import HttpResponseForbidden


class AutomaticUserLoginMiddleware(MiddlewareMixin):

    def process_view(self, request, view_func, view_args, view_kwargs):
        if not AutomaticUserLoginMiddleware._is_user_authenticated(request):
            user = auth.authenticate(request)

yannbriancon

from django.contrib.auth.backends import ModelBackend
from django.contrib.auth.models import User
from .services.ldap import get_LDAP_user


class AuthenticationBackend(ModelBackend):

    def authenticate(self, request, username=None, password=None, **kwargs):

        # Get the user information from the LDAP if he can be authenticated

yannbriancon

...
# Application definition

AUTHENTICATION_BACKENDS = [
   'AutomaticDjangoAuthentication.authentication_backend.AuthenticationBackend',
]

INSTALLED_APPS = [
...

yannbriancon

import ...

class AuthenticationBackend(ModelBackend):

    def authenticate(self, request, username=None, password=None, **kwargs):
      
        # Get credentials from the query strings
        username = request.GET.get('username')
        password = request.GET.get('password')
        

yannbriancon

from ldap3 import Server, Connection, ALL

LDAP_URL = 'ldap.forumsys.com'

# Check user authentication in the LDAP and return his information
def get_LDAP_user(username, password):
    try:
        server = Server(LDAP_URL, get_info=ALL)
        connection = Connection(server,
                                'uid={username},dc=example,dc=com'.format(

yannbriancon

# Application definition

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    # Add the new middleware just after the default AuthenticationMiddleware that manages sessions and cookies
    'AutomaticDjangoAuthentication.authentication_middleware.AutomaticUserLoginMiddleware',

yannbriancon

class Message {
    ...
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "author_id")
    private User author;
}

yannbriancon

void logMessages() {
    // Get all the messages from the database
    // -> Triggers 1 query
    Set<Message> messages = messageDao.findAll();
    
    // Map through the N messages to create the DTO with the author display name
    // -> Triggers 1 query to fetch each author so N queries!
    messages.stream.map(
        message -> logger.info(
            message.getAuthor().getName() + ": " + message.getText()

yannbriancon

<dependency>
    <groupId>com.yannbriancon</groupId>
    <artifactId>spring-hibernate-query-utils</artifactId>
    <version>1.0.3</version>
</dependency>

yannbriancon

...
import com.yannbriancon.interceptor.HibernateQueryCountInterceptor;


@RunWith(SpringRunner.class)
@SpringBootTest
@Transactional
public class NotificationResourceIntTest {
    @Autowired
    private HibernateQueryCountInterceptor hibernateQueryCountInterceptor;