Using pijyoi's patch for connection close.

mongoose.c

@@ -4903,9 +4903,8 @@ static int getreq(struct mg_connection *conn, char *ebuf, size_t ebuf_len) {
 
   if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
     snprintf(ebuf, ebuf_len, "%s", "Request Too Large");
-  } if (conn->request_len <= 0) {
+  } else if (conn->request_len <= 0) {
     snprintf(ebuf, ebuf_len, "%s", "Client closed connection");
-    conn->must_close = 1;
   } else if (parse_http_message(conn->buf, conn->buf_size,
                                 &conn->request_info) <= 0) {
     snprintf(ebuf, ebuf_len, "Bad request: [%.*s]", conn->data_len, conn->buf);
@@ -4960,6 +4959,7 @@ static void process_new_connection(struct mg_connection *conn) {
   do {
     if (!getreq(conn, ebuf, sizeof(ebuf))) {
       send_http_error(conn, 500, "Server Error", "%s", ebuf);
+      conn->must_close = 1;
     } else if (!is_valid_uri(conn->request_info.uri)) {
       snprintf(ebuf, sizeof(ebuf), "Invalid URI: [%s]", ri->uri);
       send_http_error(conn, 400, "Bad Request", "%s", ebuf);