this is almost ready

http.py

@@ -38,6 +38,9 @@ Fork = False
 # client's code in a public project.
 # Thus cut 'n' paste.
 
+CRLF = "\r\n"
+LF = "\n"
+
 
 class AccessDict(dict):
     def __init__(self, *args, **kwargs):
@@ -83,6 +86,8 @@ class HttpRequest(AccessDict):
         self["headers"] = headers
         self["body"] = StringIO(body)
         self["path"] = path
+        if "Host" not in self["headers"]:
+            self["headers"]["Host"] = "localhost"
 
     def read(self, seek):
         return self["body"].read(seek)
@@ -92,6 +97,7 @@ class HttpRequest(AccessDict):
         buf.write(f"{self.method} {self.path} HTTP/1.1")
         for k, v in self["headers"].items():
             buf.write(f"{k}: {v}\r\n")
+        buf.write(CRLF + CRLF)
         buf.write(self["body"].getvalue() + "\r\n")
         return buf.getvalue() + "\r\n"
 
@@ -115,6 +121,7 @@ class HttpResponse(AccessDict):
     def write(self, stuff):
         return self.body.write(stuff)
 
+    # Foreshadowing (n): A literary device in which an author ...
     def __str__(self):
         buf = StringIO()
         print(self.headers)
@@ -123,6 +130,8 @@ class HttpResponse(AccessDict):
         for k, v in self["headers"].items():
             buf.write(f"{k}: {v}\r\n")
         buf.write(f"Content-Length: {length}\r\n")
+        buf.write(CRLF + CRLF)  # Per RFC 9112
+
         buf.write(self["body"].getvalue() + "\r\n")
         return buf.getvalue() + "\r\n"