tomcat ErrorPage

最新推荐文章于 2024-12-26 07:35:52 发布

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最新推荐文章于 2024-12-26 07:35:52 发布

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分类专栏：安全项目开发Rasp

本文链接：https://blog.youkuaiyun.com/luman1991/article/details/78363325

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本文介绍了一种在Java Web应用中处理HTTP错误状态码的方法，通过查找并渲染自定义的错误页面来提升用户体验。该方法在收到错误状态码时会尝试从当前上下文中寻找对应的错误页面，若未找到特定错误页，则使用默认错误页。

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StandardHostValve

private void status(Request request, Response response) {

        int statusCode = response.getStatus();

        // Handle a custom error page for this status code
        Context context = request.getContext();
        if (context == null)
            return;

        /* Only look for error pages when isError() is set.
         * isError() is set when response.sendError() is invoked. This
         * allows custom error pages without relying on default from
         * web.xml.
         */
        if (!response.isError())
            return;

        ErrorPage errorPage = context.findErrorPage(statusCode);
        if (errorPage == null) {
            // Look for a default error page
            errorPage = context.findErrorPage(0);
        }
        if (errorPage != null && response.setErrorReported()) {
            response.setAppCommitted(false);
            request.setAttribute(RequestDispatcher.ERROR_STATUS_CODE,
                              Integer.valueOf(statusCode));

            String message = response.getMessage();
            if (message == null)
                message = "";
            request.setAttribute(RequestDispatcher.ERROR_MESSAGE, message);
            request.setAttribute(Globals.DISPATCHER_REQUEST_PATH_ATTR,
                    errorPage.getLocation());
            request.setAttribute(Globals.DISPATCHER_TYPE_ATTR,
                    DispatcherType.ERROR);


            Wrapper wrapper = request.getWrapper();
            if (wrapper != null)
                request.setAttribute(RequestDispatcher.ERROR_SERVLET_NAME,
                                  wrapper.getName());
            request.setAttribute(RequestDispatcher.ERROR_REQUEST_URI,
                                 request.getRequestURI());
            if (custom(request, response, errorPage)) {
                try {
                    response.finishResponse();
                } catch (ClientAbortException e) {
                    // Ignore
                } catch (IOException e) {
                    container.getLogger().warn("Exception Processing " + errorPage, e);
                }
            }
        }
    }