Fix compilation errors of the web interface

web/chttp.c

@@ -4327,6 +4327,54 @@ void http_response_builder_body(HTTP_ResponseBuilder builder, HTTP_String str)
     byte_queue_write(&conn->output, str.ptr, str.len);
 }
 
+void http_response_builder_body_cap(HTTP_ResponseBuilder builder, int cap)
+{
+    HTTP_ServerConn *conn = builder_to_conn(builder);
+    if (conn == NULL)
+        return;
+
+    if (conn->state != HTTP_SERVER_CONN_WAIT_HEADER) {
+        append_special_headers(conn);
+        conn->state = HTTP_SERVER_CONN_WAIT_BODY;
+    }
+
+    if (conn->state != HTTP_SERVER_CONN_WAIT_BODY)
+        return;
+
+    byte_queue_write_setmincap(&conn->output, cap);
+}
+
+char *http_response_builder_body_buf(HTTP_ResponseBuilder builder, int *cap)
+{
+    HTTP_ServerConn *conn = builder_to_conn(builder);
+    if (conn == NULL)
+        return NULL;
+
+    if (conn->state != HTTP_SERVER_CONN_WAIT_HEADER) {
+        append_special_headers(conn);
+        conn->state = HTTP_SERVER_CONN_WAIT_BODY;
+    }
+
+    if (conn->state != HTTP_SERVER_CONN_WAIT_BODY)
+        return NULL;
+
+    ByteView tmp = byte_queue_write_buf(&conn->output);
+    *cap = tmp.len;
+    return tmp.ptr;
+}
+
+void http_response_builder_body_ack(HTTP_ResponseBuilder builder, int num)
+{
+    HTTP_ServerConn *conn = builder_to_conn(builder);
+    if (conn == NULL)
+        return;
+
+    if (conn->state != HTTP_SERVER_CONN_WAIT_BODY)
+        return;
+
+    byte_queue_write_ack(&conn->output, num);
+}
+
 void http_response_builder_send(HTTP_ResponseBuilder builder)
 {
     HTTP_ServerConn *conn = builder_to_conn(builder);