fix: send_reponse err handling

runtime/include/client_socket.h

@@ -40,7 +40,7 @@ typedef void (*void_cb)(void);
  * @param client_socket - the client we are rejecting
  * @param buffer - buffer to write to socket
  * @param on_eagain - cb to execute when client socket returns EAGAIN. If NULL, error out
- * @returns 0
+ * @returns 0 on success, -1 on error.
  */
 static inline int
 client_socket_send(int client_socket, const char *buffer, size_t buffer_len, void_cb on_eagain)

runtime/include/current_sandbox_send_response.h

@@ -40,9 +40,12 @@ current_sandbox_send_response()
 	sandbox->total_time = end_time - sandbox->timestamp_of.request_arrival;
 
 	/* Send HTTP Response Header and Body */
-	http_header_200_write(sandbox->client_socket_descriptor, module_content_type, response_body_size);
-	client_socket_send(sandbox->client_socket_descriptor, (const char *)response->buffer, response_body_size,
-	                   current_sandbox_sleep);
+	rc = http_header_200_write(sandbox->client_socket_descriptor, module_content_type, response_body_size);
+	if (rc < 0) goto err;
+
+	rc = client_socket_send(sandbox->client_socket_descriptor, (const char *)response->buffer, response_body_size,
+	                        current_sandbox_sleep);
+	if (rc < 0) goto err;
 
 	http_total_increment_2xx();
 	rc = 0;