Validate URL scheme and host in request

Add validation for URL scheme and netloc in request

Author: lovelydinosaur

src/ahttpx/_request.py

@@ -29,6 +29,11 @@ def __init__(
         if "Host" not in self.headers:
             self.headers = self.headers.copy_set("Host", self.url.netloc)
 
+        if self.url.scheme not in ('http', 'https'):
+            raise ValueError(f'Invalid scheme for URL {str(self.url)!r}.')
+        if not self.url.netloc:
+            raise ValueError(f'Missing host for URL {str(self.url)!r}.')
+
         if content is not None:
             if isinstance(content, bytes):
                 self.stream = ByteStream(content)