Restlet客户端资源“未修改"状况 [英] Restlet client resource "not modified" condition

问题描述

我有一个基于 Restlet 的应用程序，我正在尝试使用 Restlet 客户端资源来测试它的某些部分.

I've got a Restlet based application, and I'm trying to use Restlet client resources to test certain parts of it.

自从从 Restlet 2.2.3 升级到 2.3.4 后，我的 ETag 验证测试开始失败.这是我在旧版本中添加标题的方式:

Since upgrading from Restlet 2.2.3 to 2.3.4, my ETag verification tests have started failing. Here's how I was adding the header in the old version:

Series<Header> headers = (Series<Header>) currentClientResource.getRequest().getAttributes().get("org.restlet.http.headers");
if (headers == null) {
    headers = new Series<Header>(Header.class);
}
headers.add("If-None-Match", "\"" + eTag + "\"");
currentClientResource.getRequestAttributes().put("org.restlet.http.headers", headers);

然后在包装好的 clientResource 上再次调用represent() 时，我得到了 304 Not Modified 响应(这正是我想要的).

Then when calling represent() again on the wrapped clientResource I was getting a 304 Not Modified response (which is what I want).

在 2.3.4 中，这开始返回 200 OK，我注意到一条关于未直接设置 If-None-Match 标头的日志消息.相反，我现在正在尝试:

In 2.3.4 this started returning a 200 OK instead, and I noticed a log message about not setting the If-None-Match header directly. Instead I'm now trying this:

currentClientResource.getRequest().getConditions().getNoneMatch().add(new Tag(eTag));

然而，这仍然给了我 200 OK.如果我通过 REST 客户端手动执行请求，我会得到 304 Not Modified，所以服务器仍然在做正确的行为.我需要在测试中做什么才能看到我想看到的内容?

However this is still giving me a 200 OK. If I do the request manually through a REST client I can get a 304 Not Modified, so the server is still doing the right behavior. What do I need to do in the tests to see what I want to see?

推荐答案

我试了一下，Restlet 2.3.4 版对我有用.

I made a try and it works for me with version 2.3.4 of Restlet.

这是我所做的:

• 用于我的测试的 Maven 依赖项

<project>
  <modelVersion>4.0.0</modelVersion>
  (...)

  <properties>
    <java-version>1.7</java-version>
    <restlet-version>2.3.4</restlet-version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.restlet.jse</groupId>
      <artifactId>org.restlet</artifactId>
      <version>${restlet-version}</version>
    </dependency>

    <dependency>
      <groupId>org.restlet.jse</groupId>
      <artifactId>org.restlet.ext.jetty</artifactId>
      <version>${restlet-version}</version>
    </dependency>

    <dependency>
      <groupId>org.restlet.jse</groupId>
      <artifactId>org.restlet.ext.jackson</artifactId>
      <version>${restlet-version}</version>
    </dependency>

    <dependency>
      <groupId>org.restlet.jse</groupId>
      <artifactId>org.restlet.ext.crypto</artifactId>
      <version>${restlet-version}</version>
    </dependency>
  </dependencies>

  <repositories>
    <repository>
      <id>maven-restlet</id>
      <name>Public online Restlet repository</name>
      <url>http://maven.restlet.com</url>
    </repository>
  </repositories>
</project>

一个服务器资源，用于在返回的表示上设置 etag:

A server resource that sets the etag on the returned representation:

public class ETagServerResource extends ServerResource {
  @Get
  public Representation test() {
    String test = "test";
    String md5 = DigestUtils.toMd5(test);

    StringRepresentation repr = new StringRepresentation(test);
    repr.setTag(new Tag(md5));
    return repr;
  }
}

客户端进行两次调用:第一个没有 etag，第二个带有应该返回 304 状态代码的 etag.

The client that makes two calls: a first one without the etag and a second one with the etag that should return a 304 status code.

// First call
ClientResource cr
     = new ClientResource("http://localhost:8182/test");
Representation repr = cr.get();
Tag tag = repr.getTag();
System.out.println(">> cr = "+cr); // Status code: 200

// Second call
cr.getRequest().getConditions().getNoneMatch().add(tag);
cr.get();
System.out.println(">> cr = "+cr); // Status code: 304

我不知道你在服务器资源中使用了什么.随意告诉我.

I don't know what you use within the server resource. Feel free to tell me.

希望对你有帮助蒂埃里

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