fix request uri parsing

Author: saviorand

client.mojo

@@ -0,0 +1,28 @@
+from lightbug_http.http import HTTPRequest
+from lightbug_http.uri import URI
+from lightbug_http.sys.client import MojoClient
+
+fn test_request_simple_url(inout client: MojoClient) raises -> None:
+    """
+    Test making a simple GET request without parameters.
+    Validate that we get a 200 OK response.
+    """
+    var uri = URI("http://httpbin.org/")
+    var request = HTTPRequest(uri)
+    var response = client.do(request)
+
+    # print status code
+    print("Response:", response.header.status_code())
+
+    # print various parsed headers
+    print("Header", response.header.content_length())
+
+    # print body
+    # print(String(response.get_body()))
+
+
+fn main() raises -> None:
+    var client = MojoClient()
+    print("Testing URL request")
+    test_request_simple_url(client)
+    print("Done")

lightbug_http/http.mojo

@@ -241,7 +241,10 @@ fn encode(req: HTTPRequest, uri: URI) raises -> Bytes:
 
     _ = builder.write(req.header.method())
     _ = builder.write_string(String(" "))
-    _ = builder.write(uri.request_uri())
+    if len(uri.request_uri()) > 1:
+        _ = builder.write_string(uri.request_uri())
+    else:
+        _ = builder.write_string("/")
     _ = builder.write_string(String(" "))
     _ = builder.write(protocol)
     _ = builder.write_string(String("\r\n"))

lightbug_http/uri.mojo

@@ -206,11 +206,11 @@ struct URI:
         if path_start >= 0:
             host_and_port = remainder_uri[:path_start]
             request_uri = remainder_uri[path_start:]
+            self.__host = host_and_port[:path_start]._buffer
         else:
             host_and_port = remainder_uri
-            request_uri = strSlash  # Assume root if no path is provided
-
-        self.__host = host_and_port[:path_start]._buffer
+            request_uri = strSlash
+            self.__host = host_and_port._buffer
 
         if is_https:
             _ = self.set_scheme(https)