add easy way to add headers

add Connection header to add support for http 1.1

browser.py

@@ -20,7 +20,33 @@ class URL:
             self.host, port = self.host.split(":", 1)
             self.port = int(port)
 
-    def request(self) -> str:
+        self.request_string = ""
+        self.http_version = "HTTP/1.1"
+        self.headers = {"Host": self.host}
+
+    def add_request_line(self, method):
+        self.request_string += f"{method} {self.path} {self.http_version}\r\n"
+
+    def add_header(self, key, value):
+        self.headers[key] = value
+
+    def add_headers(self, headers: dict[str,str]):
+        self.headers.update(headers)
+
+    def add_default_headers(self):
+        self.add_headers({
+            "Connection": "close",
+            "User-Agent": "PyWebBrowser"
+        })
+
+    def end_headers(self):
+        for key, value in self.headers.items():
+            self.request_string += f"{key}: {value}\r\n"
+        self.request_string += "\r\n"
+
+    def request(self, method: str = "GET", headers: dict = None) -> str:
+        if headers is not None:
+            self.add_headers(headers)
         s = socket.socket(
             family=socket.AF_INET,
             type=socket.SOCK_STREAM,
@@ -31,10 +57,10 @@ class URL:
             context = ssl.SSLContext(ssl.PROTOCOL_TLS)
             s = context.wrap_socket(s, server_hostname=self.host)
 
-        request_str = f"GET {self.path} HTTP/1.0\r\n"
-        request_str += f"Host: {self.host}\r\n"
-        request_str += "\r\n"
-        s.send(request_str.encode("utf8"))
+        self.add_request_line(method)
+        self.add_default_headers()
+        self.end_headers()
+        s.send(self.request_string.encode("utf8"))
 
         response = s.makefile("r", encoding="utf8", newline="\r\n")
         status_line = response.readline()