Changed HTTP Server + Added WebSockets

Moved the existing API endpoints to use aoihttp and added websocket notifications

main.py

@@ -5,6 +5,7 @@ import json
 import threading
 import heapq
 import traceback
+import asyncio
 
 if __name__ == "__main__":
     if '--help' in sys.argv:
@@ -25,7 +26,6 @@ if '--dont-upcast-attention' in sys.argv:
     os.environ['ATTN_PRECISION'] = "fp16"
 
 import torch
-
 import nodes
 
 def get_input_data(inputs, class_def, outputs={}, prompt={}, extra_data={}):
@@ -286,16 +286,19 @@ def prompt_worker(q):
         q.task_done(item_id)
 
 class PromptQueue:
-    def __init__(self):
+    def __init__(self, socket_handler):
+        self.socket_handler = socket_handler
         self.mutex = threading.RLock()
         self.not_empty = threading.Condition(self.mutex)
         self.task_counter = 0
         self.queue = []
         self.currently_running = {}
+        socket_handler.prompt_queue = self
 
     def put(self, item):
         with self.mutex:
             heapq.heappush(self.queue, item)
+            self.socket_handler.queue_updated(self)
             self.not_empty.notify()
 
     def get(self):
@@ -306,11 +309,13 @@ class PromptQueue:
             i = self.task_counter
             self.currently_running[i] = copy.deepcopy(item)
             self.task_counter += 1
+            self.socket_handler.queue_updated(self)
             return (item, i)
 
     def task_done(self, item_id):
         with self.mutex:
             self.currently_running.pop(item_id)
+            self.socket_handler.queue_updated(self)
 
     def get_current_queue(self):
         with self.mutex:
@@ -326,6 +331,7 @@ class PromptQueue:
     def wipe_queue(self):
         with self.mutex:
             self.queue = []
+            self.socket_handler.queue_updated(self)
 
     def delete_queue_item(self, function):
         with self.mutex:
@@ -336,35 +342,82 @@ class PromptQueue:
                     else:
                         self.queue.pop(x)
                         heapq.heapify(self.queue)
+                    self.socket_handler.queue_updated(self)
                     return True
         return False
 
-from http.server import BaseHTTPRequestHandler, HTTPServer
+import aiohttp
+from aiohttp import web
 
-class PromptServer(BaseHTTPRequestHandler):
-    def _set_headers(self, code=200, ct='text/html'):
-        self.send_response(code)
-        self.send_header('Content-type', ct)
-        self.end_headers()
-    def log_message(self, format, *args):
-        pass
-    def do_GET(self):
-        if self.path == "/prompt":
-            self._set_headers(ct='application/json')
+def get_queue_info(prompt_queue):
     prompt_info = {}
     exec_info = {}
-            exec_info['queue_remaining'] = self.server.prompt_queue.get_tasks_remaining()
+    exec_info['queue_remaining'] = prompt_queue.get_tasks_remaining()
     prompt_info['exec_info'] = exec_info
-            self.wfile.write(json.dumps(prompt_info).encode('utf-8'))
-        elif self.path == "/queue":
-            self._set_headers(ct='application/json')
-            queue_info = {}
-            current_queue = self.server.prompt_queue.get_current_queue()
-            queue_info['queue_running'] = current_queue[0]
-            queue_info['queue_pending'] = current_queue[1]
-            self.wfile.write(json.dumps(queue_info).encode('utf-8'))
-        elif self.path == "/object_info":
-            self._set_headers(ct='application/json')
+    return prompt_info
+
+class SocketHandler():
+    def __init__(self, loop):
+        self.connected = set()
+        self.messages = asyncio.Queue()
+        self.loop = loop
+
+    async def publish_loop(self):
+        while True:
+            msg =  await self.messages.get()
+            await self.send(msg)
+
+    def queue_updated(self, queue):
+        # This is called by the queue processing thread so we need to make it thread safe
+        loop.call_soon_threadsafe(self.messages.put_nowait, { 'type': 'status', 'status': get_queue_info(queue) })
+
+    async def send(self, message, socket = None):
+        if isinstance(message, str) == False:
+            message = json.dumps(message)
+        
+        if socket is None:
+            for ws in self.connected:
+                await ws.send_str(message)
+        else:
+            await socket.send_str(message)
+    
+    async def process(self, request):
+        ws = web.WebSocketResponse()
+        await ws.prepare(request)
+        self.connected.add(ws)
+        try:
+            # Send initial state to the new client
+            await self.send({ 'type': 'status', 'status': get_queue_info(self.prompt_queue) }, ws)
+            async for msg in ws:
+                if msg.type == aiohttp.WSMsgType.ERROR:
+                    print('ws connection closed with exception %s' % ws.exception())
+        finally:
+            self.connected.remove(ws)
+
+        return ws
+        
+class PromptServer():
+    def __init__(self, prompt_queue, socket_handler):
+        self.prompt_queue = prompt_queue
+        self.socket_handler = socket_handler
+        self.number = 0
+        self.app = web.Application()
+        routes = web.RouteTableDef()
+
+        @routes.get('/ws')
+        async def websocket_handler(request):
+            return await self.socket_handler.process(request)
+        
+        @routes.get("/")
+        async def get_root(request):
+            return aiohttp.web.HTTPFound('/index.html')
+        
+        @routes.get("/prompt")
+        async def get_prompt(request):
+            return web.json_response(get_queue_info(self.prompt_queue))
+        
+        @routes.get("/object_info")
+        async def get_object_info(request):
             out = {}
             for x in nodes.NODE_CLASS_MAPPINGS:
                 obj_class = nodes.NODE_CLASS_MAPPINGS[x]
@@ -377,40 +430,32 @@ class PromptServer(BaseHTTPRequestHandler):
                 if hasattr(obj_class, 'CATEGORY'):
                     info['category'] = obj_class.CATEGORY
                 out[x] = info
-            self.wfile.write(json.dumps(out).encode('utf-8'))
-        elif self.path[1:] in os.listdir(self.server.server_dir):
-            if self.path[1:].endswith('.css'):
-                self._set_headers(ct='text/css')
-            elif self.path[1:].endswith('.js'):
-                self._set_headers(ct='text/javascript')
-            else:
-                self._set_headers()
-            with open(os.path.join(self.server.server_dir, self.path[1:]), "rb") as f:
-                self.wfile.write(f.read())
-        else:
-            self._set_headers()
-            with open(os.path.join(self.server.server_dir, "index.html"), "rb") as f:
-                self.wfile.write(f.read())
+            return web.json_response(out)
         
-    def do_HEAD(self):
-        self._set_headers()
+        @routes.get("/queue")
+        async def get_queue(request):
+            queue_info = {}
+            current_queue = self.prompt_queue.get_current_queue()
+            queue_info['queue_running'] = current_queue[0]
+            queue_info['queue_pending'] = current_queue[1]
+            return web.json_response(queue_info)
         
-    def do_POST(self):
+        @routes.post("/prompt")
+        async def post_prompt(request):
+            print("got prompt")
             resp_code = 200
             out_string = ""
-        if self.path == "/prompt":
-            print("got prompt")
-            data_string = self.rfile.read(int(self.headers['Content-Length']))
-            json_data = json.loads(data_string)
+            json_data =  await request.json()
+
             if "number" in json_data:
                 number = float(json_data['number'])
             else:
-                number = self.server.number
+                number = self.number
                 if "front" in json_data:
                     if json_data['front']:
                         number = -number
 
-                self.server.number += 1
+                self.number += 1
             if "prompt" in json_data:
                 prompt = json_data["prompt"]
                 valid = validate_prompt(prompt)
@@ -418,46 +463,54 @@ class PromptServer(BaseHTTPRequestHandler):
                 if "extra_data" in json_data:
                     extra_data = json_data["extra_data"]
                 if valid[0]:
-                    self.server.prompt_queue.put((number, id(prompt), prompt, extra_data))
+                    self.prompt_queue.put((number, id(prompt), prompt, extra_data))
                 else:
                     resp_code = 400
                     out_string = valid[1]
                     print("invalid prompt:", valid[1])
-        elif self.path == "/queue":
-            data_string = self.rfile.read(int(self.headers['Content-Length']))
-            json_data = json.loads(data_string)
+
+            return web.Response(body=out_string, status=resp_code)
+        
+        @routes.post("/queue")
+        async def post_queue(request):
+            json_data =  await request.json()
             if "clear" in json_data:
                 if json_data["clear"]:
-                    self.server.prompt_queue.wipe_queue()
+                    self.prompt_queue.wipe_queue()
             if "delete" in json_data:
                 to_delete = json_data['delete']
                 for id_to_delete in to_delete:
                     delete_func = lambda a: a[1] == int(id_to_delete)
-                    self.server.prompt_queue.delete_queue_item(delete_func)
-
-        self._set_headers(code=resp_code)
-        self.end_headers()
-        self.wfile.write(out_string.encode('utf8'))
-        return
-
-
-def run(prompt_queue, address='', port=8188):
-    server_address = (address, port)
-    httpd = HTTPServer(server_address, PromptServer)
-    httpd.server_dir = os.path.join(os.path.dirname(os.path.realpath(__file__)), "webshit")
-    httpd.prompt_queue = prompt_queue
-    httpd.number = 0
-    if server_address[0] == '':
-        addr = '0.0.0.0'
-    else:
-        addr = server_address[0]
+                    self.prompt_queue.delete_queue_item(delete_func)
+                    
+            return web.Response(status=200)
+
+        self.app.add_routes(routes)
+        self.app.add_routes([
+            web.static('/', os.path.join(os.path.dirname(os.path.realpath(__file__)), "webshit")),
+        ])
+
+async def start_server(server, address, port):
+    runner = web.AppRunner(server.app)
+    await runner.setup()
+    site = web.TCPSite(runner, address, port)
+    await site.start()
+    
+    if address == '':
+        address = '0.0.0.0'
     print("Starting server\n")
-    print("To see the GUI go to: http://{}:{}".format(addr, server_address[1]))
-    httpd.serve_forever()
+    print("To see the GUI go to: http://{}:{}".format(address, port))   
 
+async def run(prompt_queue, socket_handler, address='', port=8188):
+    server = PromptServer(prompt_queue, socket_handler)
+    await asyncio.gather(start_server(server, address, port), socket_handler.publish_loop())
 
 if __name__ == "__main__":
-    q = PromptQueue()
+    loop = asyncio.new_event_loop()
+    asyncio.set_event_loop(loop)
+
+    socket_handler = SocketHandler(loop)
+    q = PromptQueue(socket_handler)
     threading.Thread(target=prompt_worker, daemon=True, args=(q,)).start()
     if '--listen' in sys.argv:
         address = '0.0.0.0'
@@ -471,6 +524,9 @@ if __name__ == "__main__":
     except:
         pass
 
-    run(q, address=address, port=port)
+    try:
+        loop.run_until_complete(run(q, socket_handler, address=address, port=port))
+    except KeyboardInterrupt:
+        pass