fix http api

Author: qwj

pproxy/proto.py

@@ -296,7 +296,7 @@ async def reply(code, message, body=None, wait=False):
             if wait:
                 await writer.drain()
         return await self.http_accept(user, method, path, None, ver, lines, headers.get('Host', ''), headers.get('Proxy-Authorization'), reply, **kw)
-    async def http_accept(self, user, method, path, authority, ver, lines, host, pauth, reply, authtable, users, httpget, **kw):
+    async def http_accept(self, user, method, path, authority, ver, lines, host, pauth, reply, authtable, users, httpget=None, **kw):
         url = urllib.parse.urlparse(path)
         if method == 'GET' and not url.hostname:
             for path, text in (httpget.items() if httpget else ()):