Add optional SwarmUI service using Deck ComfyUI API

deploy/swarm-ui/proxy.py

@@ -0,0 +1,61 @@
+"""Direct authenticated transport to Deck's own ComfyUI, including WebSocket."""
+import http.client
+import socket
+import select
+from pathlib import Path
+from http.server import BaseHTTPRequestHandler,ThreadingHTTPServer
+import os
+MAX_BODY=256*1024*1024
+REQUEST_HEADERS={'content-type','accept','range','if-range','if-none-match','if-modified-since'}
+HOP_HEADERS={'connection','keep-alive','proxy-authenticate','proxy-authorization','te','trailer','transfer-encoding','upgrade'}
+
+def relay(handler,port):
+ if handler.headers.get('Transfer-Encoding'):raise ValueError('Content-Length erforderlich.')
+ length=int(handler.headers.get('Content-Length','0'))
+ if not 0<=length<=MAX_BODY:raise ValueError('Maximal 256 MiB pro Upload.')
+ if handler.headers.get('Upgrade','').lower()=='websocket':
+  with socket.create_connection(('127.0.0.1',port),timeout=10) as upstream:
+   lines=[f'{handler.command} {handler.path} HTTP/1.1',f'Host: 127.0.0.1:{port}','Authorization: Bearer '+Path('/run/secrets/comfy-token').read_text().strip()]
+   for key in ('Upgrade','Connection','Sec-WebSocket-Key','Sec-WebSocket-Version','Sec-WebSocket-Protocol'):
+    if handler.headers.get(key):lines.append(key+': '+handler.headers[key])
+   upstream.sendall(('\r\n'.join(lines)+'\r\n\r\n').encode());head=b''
+   while b'\r\n\r\n' not in head:
+    chunk=upstream.recv(4096)
+    if not chunk:raise ValueError('WebSocket-Verbindung abgebrochen.')
+    head+=chunk
+    if len(head)>65536:raise ValueError('Ungültige WebSocket-Antwort.')
+   handler.sent=True;handler.connection.sendall(head);upstream.settimeout(None)
+   while True:
+    readable,_,_=select.select([upstream,handler.connection],[],[],60)
+    if not readable:continue
+    for source in readable:
+     data=source.recv(65536)
+     if not data:return
+     (handler.connection if source is upstream else upstream).sendall(data)
+ else:
+  upstream=http.client.HTTPConnection('127.0.0.1',port,timeout=3600)
+  try:
+   headers={k:v for k,v in handler.headers.items() if k.lower() in REQUEST_HEADERS};headers['Content-Length']=str(length);headers['Authorization']='Bearer '+Path('/run/secrets/comfy-token').read_text().strip()
+   upstream.putrequest(handler.command,handler.path)
+   for key,value in headers.items():upstream.putheader(key,value)
+   upstream.endheaders();remaining=length
+   while remaining:
+    chunk=handler.rfile.read(min(1024*1024,remaining))
+    if not chunk:raise ValueError('Unvollständiger Upload.')
+    upstream.send(chunk);remaining-=len(chunk)
+   response=upstream.getresponse();handler.sent=True;handler.send_response(response.status)
+   for key,value in response.getheaders():
+    if key.lower() not in HOP_HEADERS|{'server','date'}:handler.send_header(key,value)
+   handler.send_header('Connection','close');handler.end_headers();handler.close_connection=True
+   if handler.command!='HEAD':
+    while chunk:=response.read(1024*1024):handler.wfile.write(chunk)
+  finally:upstream.close()
+
+class Handler(BaseHTTPRequestHandler):
+ def log_message(self,*args):pass
+ def route(self):
+  try:relay(self,int(os.environ.get('SWARM_DECK_PORT','8120')))
+  except (OSError,ValueError):
+   if not getattr(self,'sent',False):self.send_error(503,'Deck video backend unavailable')
+ do_GET=do_POST=do_PUT=do_PATCH=do_DELETE=do_HEAD=route
+if __name__=='__main__':ThreadingHTTPServer(('127.0.0.1',int(os.environ.get('SWARM_PROXY_PORT','8126'))),Handler).serve_forever()