Question

在我的应用程序中，我想使用spark.Spark.before添加一个过滤器进行验证，如果请求被授予，那么我想向请求本身添加一些信息，所以在我的spark.Route实现中可以访问这个信息。

但我不知道该怎么做

例如：

// RequestFilter
before((request, response) -> {
    if (isGrantedRequest()) {
        // modify request adding params, etc
        // maybe using some kind of RequestWrapper
    }
})

.....

post("/", this::handle);

.....

// Request handler
Object handle(Request request, Response response) throws Exception {
    // access to information added in request
}

Answer 1

查看此answer。

您可以使用属性。与会话不同，这不会使您的应用程序状态完整。其他属性是请求的本地属性，与会话不同，它们对每个请求都具有唯一值，即使是同时请求也是如此。

在过滤器前设置属性。

14:30:04: Warning: componentWillMount is deprecated and will be removed in 
the next major version. Use componentDidMount instead. As a temporary 
workaround, you can rename to UNSAFE_componentWillMount.

Please update the following components: ExpoRootComponent, 
RootErrorBoundary, Text, View

Learn more about this warning here:
xxx:/fb.me/react-async-component-lifecycle-hooks
- node_modules\react-native\Libraries\ReactNative\YellowBox.js:82:15 in warn
- node_modules\react-native\Libraries\Renderer\ReactNativeRenderer- 
dev.js:5706:19 in printWarning
- ... 21 more stack frames from framework internals
14:30:06: Warning: componentWillReceiveProps is deprecated and will be 
removed in the next major version. Use static getDerivedStateFromProps 
instead.

Please update the following components: Text, View

Learn more about this warning here:
xxx:/fb.me/react-async-component-lifecycle-hooks
- node_modules\react-native\Libraries\ReactNative\YellowBox.js:82:15 in warn
- node_modules\react-native\Libraries\Renderer\ReactNativeRenderer- 
dev.js:5706:19 in printWarning
- ... 21 more stack frames from framework internals

并在处理程序中阅读。

before((req, res) -> {
    req.attribute("key", "value");
});

Answer 2

您可以使用会话来实现此目的。它是用于设置数据的请求的一个位置。

在before代码中，您将根据isGrantedRequest()方法的结果创建会话并在其中设置一些属性：

Spark.before("/somePath", (req, res) -> {
    Session ses = req.session(true);
    if (isGrantedRequest()) {
        ses.attribute("attr1", "valA");
        ses.attribute("attr2", "valB");
    } else {
        ses.attribute("attr1", "valX");
        ses.attribute("attr2", "valY");
    }
});

在get / post代码中，您将检索会话属性：

Spark.get("/somePath", (req, res) -> {
    Session ses = req.session();
    if (ses != null) {
        String val1 = ses.attribute("attr1");
        String val2 = ses.attribute("attr2");
        System.out.println(val1 + " " + val2);
    }
    return "";
});

查看Spark's sessions API以查看更多选项。

使用RequestWrappers在Sparkweb框架中修改请求

2 个答案: