Java Code Examples for com.jfinal.core.Controller#renderJson()

/**
 * 处理 Controller 的限流
 *
 * @param resource
 * @param inv
 */
protected void doProcessWebLimit(String resource, Invocation inv) {

    Controller controller = inv.getController();
    controller.getResponse().setStatus(config.getDefaultHttpCode());

    if (RequestUtil.isAjaxRequest(controller.getRequest())) {
        controller.renderJson(config.getDefaultAjaxContent());
    }
    //非ajax的正常请求
    else {
        String limitView = config.getDefaultHtmlView();
        if (limitView != null) {
            controller.render(limitView);
        } else {
            controller.renderText("reqeust limit.");
        }
    }
}
 

@Override
public void intercept(ActionInvocation ai) {
    Controller controller = ai.getController();
    String token = controller.getPara("token");
    if (StringUtils.isEmpty(token)) {
        controller.renderJson(new BaseResponse(Code.ARGUMENT_ERROR, "token can not be null"));
        return;
    }

    User user = TokenManager.getMe().validate(token);
    if (user == null) {
        controller.renderJson(new BaseResponse(Code.TOKEN_INVALID, "token is invalid"));
        return;
    }
    
    controller.setAttr("user", user);
    ai.invoke();
}
 

private void renderError(Controller controller, String renderType, String formName, String message, String redirectUrl, String htmlPath, int errorCode) {
    switch (renderType) {
        case ValidateRenderType.DEFAULT:
            if (RequestUtil.isAjaxRequest(controller.getRequest())) {
                controller.renderJson(
                        Ret.fail("message", message)
                                .set("errorCode", errorCode)
                                .setIfNotNull("formName", formName)
                );
            } else {
                controller.renderError(404);
            }
            break;
        case ValidateRenderType.JSON:
            controller.renderJson(
                    Ret.fail("message", message)
                            .set("errorCode", errorCode)
                            .setIfNotNull("formName", formName)
            );
            break;
        case ValidateRenderType.REDIRECT:
            controller.redirect(redirectUrl);
            break;
        case ValidateRenderType.HTML:
            controller.render(htmlPath);
            break;
        case ValidateRenderType.TEXT:
            controller.renderText(message);
            break;
        default:
            throw new IllegalArgumentException("can not process render : " + renderType);
    }
}
 

@Override
public void intercept(Invocation inv) {
    boolean flag = true;

    Controller controller = inv.getController();

    // 验证菜单权限
    RequirePermission requirePermission = inv.getClass().getAnnotation(RequirePermission.class);
    List<String> codes;
    if (requirePermission != null ) {
        codes = requirePermission.isPermission() ?
                controller.getSessionAttr("menuCodes") : controller.getSessionAttr("roleCodes");
        flag = codes.contains(requirePermission.value());
    }

    if (flag) {
        // 菜单权限通后 再验证按钮权限
        requirePermission = inv.getMethod().getAnnotation(RequirePermission.class);
        if (requirePermission != null) {
            codes = requirePermission.isPermission() ?
                    controller.getSessionAttr("buttonCodes") : controller.getSessionAttr("roleCodes");
            flag = codes.contains(requirePermission.value());
        }
    }

    if (flag) {
        // 菜单权限、按钮权限 都具备 放行
        inv.invoke();
        return;
    }

    // 无权限响应
    String requestType = inv.getController().getHeader("X-Requested-With");
    if ("XMLHttpRequest".equals(requestType) || StringUtils.notEmpty(inv.getController().getPara("xmlHttpRequest"))) {
        Ret ret = Ret.create().setFail().set("msg", "无权限操作！您的行为已被记录到日志。"); // 其实并没有，可以自行扩展
        controller.renderJson(ret);
    } else {
        controller.render("/WEB-INF/views/common/no_permission.ftl");
    }
}
 

@Override
public void intercept(Invocation inv) {

    Controller c = inv.getController();

    Long productId = inv.getController().getLong("id");
    Product product = productService.findById(productId);

    if (product == null || !product.isNormal()) {
        if (RequestUtil.isAjaxRequest(c.getRequest())) {
            c.renderJson(Ret.fail().set("code", "2").set("message", "商品不存在或已下架。"));
        } else {
            c.renderError(404);
        }
        return;
    }


    User user = UserInterceptor.getThreadLocalUser();
    if (user == null) {
        if (RequestUtil.isAjaxRequest(c.getRequest())) {
            c.renderJson(Ret.fail()
                    .set("code", 1)
                    .set("message", "用户未登录")
                    .set("gotoUrl", JFinal.me().getContextPath() + "/user/login?gotoUrl=" + product.getUrl()));
        } else {
            c.redirect("/user/login?gotoUrl=" + product.getUrl());
        }
        return;
    }

    c.setAttr(ATTR_PRODUCT,product);
    inv.invoke();
}
 

/**
 * 尝试通过Controller的放回值来进行数据的渲染
 *
 * @param ai
 * @param controller
 * @return true 表示已经渲染数据了，false 表示并未按照约定编写，及没有进行渲染
 */
private boolean tryDoRender(Invocation ai, Controller controller) {
    Object returnValue = ai.getReturnValue();
    if (ai.getMethod().getAnnotation(RefreshCache.class) != null) {
        cacheService.refreshInitDataCache(GlobalResourceHandler.CACHE_HTML_PATH, controller, true);
        if (JFinal.me().getConstants().getDevMode()) {
            LOGGER.info("{} trigger refresh cache", controller.getRequest().getRequestURI());
        }
    }
    boolean rendered = false;
    if (returnValue != null) {
        if (ai.getActionKey().startsWith("/api/admin")) {
            controller.renderJson((Object) ai.getReturnValue());
            rendered = true;
        } else if (ai.getActionKey().startsWith("/admin") && returnValue instanceof String) {
            //返回值，约定：admin 开头的不写模板类型，其他要写全
            if (!returnValue.toString().endsWith(".jsp") && returnValue.toString().startsWith("/admin")) {
                String templatePath = returnValue.toString() + ".ftl";
                if (AdminInterceptor.class.getResourceAsStream(Constants.FTL_VIEW_PATH + templatePath) != null) {
                    controller.render(new FreeMarkerRender(templatePath));
                    rendered = true;
                } else {
                    rendered = false;
                }
            } else {
                controller.render(returnValue.toString());
                rendered = true;
            }
        }
    } else {
        rendered = true;
    }
    return rendered;
}
 

@Override
protected void handleError(Controller c) {
    RestResult<String> result = new RestResult<String>();
    result.error(c.getAttr(ERROR_MSG_KEY).toString());
    c.renderJson(result);
}
 

@Override
protected void handleError(Controller c) {
    Ret ret = Ret.create().setFail().set("msg", "ids 参数为空");
    c.renderJson(ret);
}
 

@Override
protected void handleError(Controller c) {
    Ret ret = Ret.create().setFail().set("msg", "id 参数为空");
    c.renderJson(ret);
}
 

/**
 * 其他处理
 * @param controller
 */
private void doProcessuDefault(Controller controller) {
    controller.renderJson(RestResult.buildError("404"));
}
 

/**
 * 没有认证信息处理
 * @param controller
 */
private void doProcessUnauthenticated(Controller controller) {
    controller.renderJson(RestResult.buildError("401"));
}
 

/**
 * 无授权信息处理
 * @param controller
 */
private void doProcessuUnauthorization(Controller controller) {
    controller.renderJson(RestResult.buildError("403"));
}