Initial friend server

diff --git a/xonstat/crypto-keygen-standalone b/xonstat/crypto-keygen-standalone
index 32f91eb050a33d50cc3dcd2beee83cd864a83c9e..ffe75dd68da752ecf22a8d70400b01b18e798b9b 120000 (symlink)
--- a/xonstat/crypto-keygen-standalone
+++ b/xonstat/crypto-keygen-standalone
@@ -1 +1 @@
-/usr/local/games/Xonotic/misc/infrastructure/keygen/crypto-keygen-standalone
\ No newline at end of file
+../../misc/infrastructure/keygen/crypto-keygen-standalone
\ No newline at end of file

diff --git a/xonstat/friends.py b/xonstat/friends.py
new file mode 100644 (file)
index 0000000..9f25287
--- /dev/null
+++ b/xonstat/friends.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python2
+
+from collections import defaultdict, deque
+from datetime import date, datetime, time, timedelta
+
+from flask import Flask, request, abort
+from d0_blind_id import d0_blind_id_verify
+
+import logging
+
+log = logging.getLogger(__name__)
+log.addHandler(logging.StreamHandler())
+log.setLevel(logging.DEBUG)
+
+keytoid = defaultdict(lambda: len(keytoid))  # TODO: replace with db lookup
+queue = defaultdict(lambda: deque(maxlen=20))
+timeoutperiod = timedelta(minutes=15)
+activity = defaultdict(lambda: None)
+
+app = Flask(__name__)
+
+def accept():
+    triple = (request.headers.get('X-D0-Blind-Id-Detached-Signature', None),
+              request.query_string.decode(),
+              request.stream.read().decode())
+    (idfp, status) = d0_blind_id_verify(*triple)
+    log.debug("d0_blind_id verification: idfp={0} status={1}".format(idfp, status))
+    log.debug("----- BEGIN REQUEST BODY -----\n{0}\n----- END REQUEST BODY -----".format(triple))
+    id = keytoid[idfp]
+    now = datetime.combine(date.today(), time())
+    activity[id] = now
+    return id, now, triple[2]
+
+@app.route('/send', methods=['POST'])
+def send():
+    (src, now, msg) = accept()
+    dst = int(request.args.get('to'))
+    ret = request.args.get('retain') in ['1']
+    activity[src] = now
+    log.debug("{0}@{1} -> {2}: {3}\n".format(src, now, dst, msg))
+
+    if ret or activity[dst] and now - timeoutperiod <= activity[dst] <= now + timeoutperiod:
+        queue[dst].extend([(src, msg)])
+        if ret:  # TODO: persist
+            pass
+    return ""
+
+@app.route('/recv', methods=['POST'])
+def recv():
+    (out, now, _) = accept()
+    q = queue[out]
+    if not len(q):
+        abort(404)
+    (src, msg) = q.popleft()
+    log.debug("{0}@{1} <- {2}\n".format(out, now, (src, msg)))
+    return "{0}\n{1}".format(src, msg)
+
+if __name__ == '__main__':
+    app.run(debug=True)