diff --git a/machines/gerd.nix b/machines/gerd.nix index 3d23141..cee0c9d 100644 --- a/machines/gerd.nix +++ b/machines/gerd.nix @@ -30,6 +30,8 @@ ./gerd/services/uptime-kuma.nix ./gerd/services/rallly + + ./gerd/services/notify ]; networking.hostName = "gerd"; diff --git a/machines/gerd/services/notify/app.py b/machines/gerd/services/notify/app.py new file mode 100644 index 0000000..11ef19a --- /dev/null +++ b/machines/gerd/services/notify/app.py @@ -0,0 +1,288 @@ +#!/usr/bin/env nix-shell +#!nix-shell --pure -i python3 -p "python3.withPackages (ps: with ps; [ flask apprise mnemonic wtforms jq ])" +from typing import Any +import apprise +from flask import Flask, request +from mnemonic import Mnemonic +import sqlite3 +import os +import jq +import json + +ENV_PREFIX = "NOTIFIER_" + + +def getenv(key: str, default: Any = None) -> Any: + v = os.getenv(ENV_PREFIX + key, default) + if not v: + exit(f"{ENV_PREFIX+key} must be specified!") + + return v + + +CONFIG_URL = getenv("URL", "http://127.0.0.1") +CONFIG_PORT = int(getenv("PORT", 8080)) + +CONFIG_DATABASE_PATH = getenv("DATABASE_PATH", "notifications.db") + +CONFIG_MATRIX_BOT_TOKEN = getenv("MATRIX_BOT_TOKEN") +CONFIG_MATRIX_HOST = getenv("MATRIX_HOST") + +CONFIG_PROXY_AUTH_USERNAME_HEADER = getenv("PROXY_AUTH_USERNAME_HEADER", "Remote-User") + +CONFIG_MAIL_USERNAME = getenv("MAIL_USERNAME") +CONFIG_MAIL_PASSWORD = getenv("MAIL_PASSWORD") +CONFIG_MAIL_DOMAIN = getenv("MAIL_DOMAIN") +CONFIG_MAIL_HOST = getenv("MAIL_HOST") +CONFIG_MAIL_PORT = int(getenv("MAIL_PORT")) +CONFIG_MAIL_MODE = getenv("MAIL_MODE", "ssl") + + +script_example = r"""#!/usr/bin/env bash +BODY="$1" +TITLE=${2:-Notification} +JQ_EXPR=${3:-.} +TYPE=${4:-matrix} +TOKEN="$(cat ~/.config/notify/token)" +# TOKEN="$(cat /run/agenix/notify-token)" +URL="||URL||/notify" + +# get stdin if needed +if [ "$BODY" = "-" ]; then + BODY="$(cat -)" +fi + +# make request +curl -H "Authorization: Bearer $TOKEN" "$URL" \ + --get \ + --data-urlencode "title=$TITLE" \ + --data-urlencode "body=$BODY" \ + --data-urlencode "jq=$JQ_EXPR" \ + --data-urlencode "type=$TYPE" +""".replace( + "||URL||", "https://notify.fricloud.dk" +) + +app = Flask(__name__) + + +def get_db(): + con = sqlite3.connect(CONFIG_DATABASE_PATH) + cur = con.cursor() + cur.execute( + "CREATE TABLE IF NOT EXISTS default_room(username TEXT PRIMARY KEY, room_id TEXT NOT NULL)" + ) + cur.execute( + "CREATE TABLE IF NOT EXISTS tokens(username TEXT PRIMARY KEY, token TEXT NOT NULL)" + ) + + return con + + +@app.route("/", methods=["GET", "POST"]) +def index(): + username = request.headers.get(CONFIG_PROXY_AUTH_USERNAME_HEADER) + if not username: + return ("Not authenticated", 401) + + # handle post stuff + if request.method == "POST": + action = request.form.get("action", "").lower() + print("Action", action) + if "token" in action: + generate_token_for_user(username) + elif "room id" in action: + roomid = request.form.get("room_id") + if not roomid: + return ("Room Id cannot be empty", 400) + set_user_default_matrix_room(username, roomid) + else: + return ("Unknown action", 400) + + con = get_db() + cur = con.cursor() + res = cur.execute( + "SELECT token FROM tokens WHERE username = ?", (username,) + ).fetchone() + + token: str = "" + if res: + token = res[0] + + res = cur.execute( + "SELECT room_id FROM default_room WHERE username = ?", (username,) + ).fetchone() + + room_id: str = "" + if res: + room_id = res[0] + + tmpl = f""" + + + + + + Notification Service + + + + +
+

Hello {username}!

+
+
+
+ + +
+ +
+
+ + +
+ +
+
+ 

+{script_example}
+
+ +
+
+ + + """ + + return tmpl + + +@app.route("/notify", methods=["GET", "POST"]) +def send_notification(): + # default to this + ntype = request.args.get("type", "matrix") + title = request.args.get("title", "Notification") + body = request.args.get("body", request.get_data().decode("utf-8")) + if not body: + body = " " + print("BODY", body) + token = request.authorization.token or request.authorization.password + if not token: + return ( + "No token found, please either specify with Authorization: Bearer or HTTPBasic", + 401, + ) + + if ( + request.method == "POST" + and "json" in request.headers.get("content-type", "") + or is_json(body) + ): + try: + body = jq.compile(request.args.get("jq", ".")).input_text(body).first() + except Exception: + return ("Unable to compile JQ, please ensure it is correct", 400) + + con = get_db() + cur = con.cursor() + print(token) + res = cur.execute( + "SELECT username FROM tokens WHERE token = ?", (token,) + ).fetchone() + + if not res: + return ("Access denied - invalid token", 401) + + username = res[0] + + if ntype not in ["matrix", "mail"]: + return ("Invalid type, only matrix or mail allowed", 400) + + print(ntype, username, token) + + apobj = apprise.Apprise() + if ntype == "matrix": + # try to get a room_id + room_id = request.args.get("room_id") + if not room_id: + res = cur.execute( + "SELECT room_id FROM default_room WHERE username = ?", (username,) + ).fetchone() + if res: + room_id = res[0] + + print(room_id) + + if not room_id: + return ("No room_id specified, and no default saved", 400) + + apobj.add(f"matrixs://{CONFIG_MATRIX_BOT_TOKEN}@{CONFIG_MATRIX_HOST}/{room_id}") + else: + apobj.add( + f"mailto://{CONFIG_MAIL_USERNAME}:{CONFIG_MAIL_PASSWORD}@{CONFIG_MAIL_HOST}:{CONFIG_MAIL_PORT}?mode={CONFIG_MAIL_MODE}&from={CONFIG_MAIL_USERNAME}@{CONFIG_MAIL_DOMAIN}&to={username}@{CONFIG_MAIL_DOMAIN}" + ) + + sent_notification = apobj.notify( + title=title, + body=body, + ) + + if not send_notification: + return ("Unable to send notification", 500) + return ("Notification sent!", 200) + + +def generate_token_for_user(username: str): + token = generate_token() + con = get_db() + cur = con.cursor() + t = cur.execute( + "INSERT INTO tokens (username, token) VALUES (?, ?) ON CONFLICT (username) DO UPDATE SET token = ?", + ( + username, + token, + token, + ), + ) + con.commit() + + +def set_user_default_matrix_room(username: str, roomid: str): + con = get_db() + cur = con.cursor() + t = cur.execute( + "INSERT INTO default_room (username, room_id) VALUES (?, ?) ON CONFLICT (username) DO UPDATE SET room_id = ?", + ( + username, + roomid, + roomid, + ), + ) + con.commit() + + +def generate_token(num_words: int = 5) -> str: + mnemo = Mnemonic("english") + words = mnemo.generate(strength=256) + return "-".join(words.split(" ")[0:num_words]) + + +def is_json(potential_json: str) -> bool: + try: + json.loads(potential_json) + return True + except Exception: + return False + + +if __name__ == "__main__": + app.run(host="127.0.0.1", port=CONFIG_PORT, debug=True) diff --git a/machines/gerd/services/notify/notify-matrix.sh b/machines/gerd/services/notify/notify-matrix.sh new file mode 100755 index 0000000..9a53b4b --- /dev/null +++ b/machines/gerd/services/notify/notify-matrix.sh @@ -0,0 +1,25 @@ +#!/usr/bin/env bash +set -e +BODY="$1" +TITLE=${2:-Notification} +JQ_EXPR=${3:-.} +TYPE=${4:-matrix} +# TOKEN="$(cat ~/.config/notify/token)" +# TOKEN="$(cat /run/agenix/notify-token)" +TOKEN="$(cat token)" +URL="https://notify.fricloud.dk/notify" +# URL="||URL||" + +# get stdin if needed +if [ "$BODY" = "-" ]; then + BODY="$(cat -)" +fi + +# make request +curl -H "Authorization: Bearer $TOKEN" "$URL" \ + --get \ + --data-urlencode "title=$TITLE" \ + --data-urlencode "body=$BODY" \ + --data-urlencode "jq=$JQ_EXPR" \ + --data-urlencode "type=$TYPE" +