ldap_gravatar: Initial version of role

roles/ldap_gravatar/files/gravatar-update.py

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+#!/usr/bin/python3
+
+import urllib
+import syslog
+import hashlib
+
+import ldap3
+import requests
+
+
+def ldap_connect():
+    server = ldap3.Server("ldapi:///var/run/ldapi")
+    conn = ldap3.Connection(
+        server,
+        authentication=ldap3.SASL,
+        sasl_mechanism=ldap3.EXTERNAL,
+        sasl_credentials="",
+        client_strategy=ldap3.SYNC,
+    )
+    conn.bind()
+    conn.search(
+        search_base="",
+        search_filter="(objectClass=*)",
+        search_scope=ldap3.BASE,
+        attributes=["namingContexts"],
+    )
+    basedn = conn.response[0]["attributes"]["namingContexts"][0]
+    return (conn, basedn)
+
+
+def get_users(conn, basedn):
+    conn.search(
+        search_base=basedn,
+        search_filter="(&(mail=*)(objectClass=inetOrgPerson))",
+        attributes=["mail", "jpegPhoto"],
+    )
+    for result in conn.response:
+        yield (result["dn"], result["attributes"])
+
+
+def get_avatar(emails):
+    for email in emails:
+        mailhash = hashlib.md5(email.encode("utf-8").lower()).hexdigest()
+        url = f"https://gravatar.com/avatar/{mailhash}.jpg?d=404&size=80"
+        req = requests.get(url)
+        if req.status_code == 200:
+            return req.content
+        elif req.status_code == 404:
+            continue
+        raise ValueError(f"Invalid response from gravatar {req.status_code}")
+    return None
+
+
+def update_avatar(conn, dn, image):
+    if image is None:
+        syslog.syslog(syslog.LOG_INFO, f"Removing jpegPhoto from user '{dn}'")
+        data = (ldap3.MODIFY_REPLACE, [])
+    else:
+        syslog.syslog(syslog.LOG_INFO, f"Updating jpegPhoto for user '{dn}'")
+        data = (ldap3.MODIFY_REPLACE, [image])
+    conn.modify(dn, {"jpegPhoto": [data]})
+
+
+if __name__ == "__main__":
+    syslog.openlog()
+    (conn, basedn) = ldap_connect()
+    for (dn, user) in get_users(conn, basedn):
+        image = get_avatar(user["mail"])
+        if len(user["jpegPhoto"]) == 1 and user["jpegPhoto"][0] == image:
+            continue
+        update_avatar(conn, dn, image)
+    syslog.closelog()

roles/ldap_gravatar/tasks/main.yml

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+---
+
+- name: install dependencies
+  package:
+    name: "{{ item }}"
+    state: installed
+  with_items:
+    - python3-ldap3
+    - python3-requests
+
+- name: install script
+  copy:
+    src: gravatar-update.py
+    dest: /usr/local/sbin/gravatar-update
+    mode: 755
+    owner: root
+    group: "{{ ansible_wheel }}"
+
+- name: install cron job
+  cron:
+    name: gravatar-update
+    hour: "05"
+    minute: "10"
+    job: /usr/local/sbin/gravatar-update
+