Introduce SETMAGICCOOKIE endpoint. First appeared during iOS17 betas.

Strange that newer UACs send this request to older SDK endpoints that
do not support this.

This functionality may make playback more complex in the future.

Tested on iOS 17.0.2 - works fine for playback.

ap2-receiver.py

@@ -411,6 +411,7 @@ def do_OPTIONS(self):
                          "ANNOUNCE, SETUP, RECORD, PAUSE, FLUSH"
                          "FLUSHBUFFERED, TEARDOWN, OPTIONS, POST, GET, PUT"
                          "SETPEERSX"
+                         "SETMAGICCOOKIE"
                          )
         self.end_headers()
 
@@ -866,6 +867,21 @@ def do_FLUSH(self):
         self.send_header("CSeq", self.headers["CSeq"])
         self.end_headers()
 
+    def do_SETMAGICCOOKIE(self):
+        # First appeared in iOS 17 betas ( User-Agent: AirPlay/710.66.3 )
+        self.logger.info(f'{self.command}: {self.path}')
+        self.logger.debug(self.headers)
+        content_len = int(self.headers["Content-Length"])
+        if content_len > 0:
+            body = self.rfile.read(content_len)
+
+            plist = readPlistFromString(body)
+            self.logger.info(self.pp.pformat(plist))
+        self.send_response(200)
+        self.send_header("Server", self.version_string())
+        self.send_header("CSeq", self.headers["CSeq"])
+        self.end_headers()
+
     def handle_command(self):
         if self.headers["Content-Type"] == HTTP_CT_BPLIST:
             content_len = int(self.headers["Content-Length"])