Replace flask-simpleldap with flask-ldap-auth.

Simpler binding (just specify the URI), so no patch required.

Dockerfile

@@ -3,7 +3,6 @@ FROM registry.hub.docker.com/library/python:3.9-slim-buster
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
         build-essential \
-        git \
         libldap2-dev \
         libsasl2-dev \
     && \

app.py

 """LDAP authentication webserver to use with Nginx' auth_request."""
 # pylint: disable=import-error
 
-from flask import Flask
-from flask_simpleldap import LDAP
+import os
+from flask import Flask, token
+from flask_ldap_auth import login_required
 
 app = Flask(__name__)
-ldap = LDAP(app)
+app.config["SECRET_KEY"] = os.getenv("SECRET_KEY", os.urandom(16))
+app.config["LDAP_AUTH_SERVER"] = os.getenv("LDAP_AUTH_SERVER", "ldapi:///")
+app.config["LDAP_TOP_DN"] = os.getenv("LDAP_TOP_DN")
+app.register_blueprint(token, url_prefix="/auth")
 
 
 @app.route("/ping")
@@ -20,7 +24,7 @@ def index():
 
 
 @app.route("/login")
-@ldap.basic_auth_required
+@login_required
 def login():
     return "OK"
 

requirements.txt

 flask
-#flask-simpleldap
-git+https://github.com/adarnimrod/flask-simpleldap.git@ldapi-support#egg=flask-simpleldap
+flask-ldap-auth
 gunicorn
 python-ldap