Question

我正在使用Dropwizard（v1.0.5），我想创建一个客户端来连接接收多部分的帖子服务。但是我收到了“错误请求”回复。

这是我的pom.xml中的依赖项

    <dependencies>
    <dependency>
        <groupId>io.dropwizard</groupId>
        <artifactId>dropwizard-core</artifactId>
        <version>${dropwizard.version}</version>
    </dependency>
    <dependency>
        <groupId>io.dropwizard</groupId>
        <artifactId>dropwizard-assets</artifactId>
        <version>${dropwizard.version}</version>
    </dependency>
    <dependency>
        <groupId>io.dropwizard</groupId>
        <artifactId>dropwizard-forms</artifactId>
        <version>${dropwizard.version}</version>
    </dependency>
    <dependency>
        <groupId>io.dropwizard</groupId>
        <artifactId>dropwizard-client</artifactId>
        <version>${dropwizard.version}</version>
    </dependency>

</dependencies>

这是我的Dropwizard应用程序（Client2PostApplication.java）：

public class Client2PostApplication extends Application<Client2PostConfiguration> {
public static void main(String[] args) throws Exception {
    new Client2PostApplication().run(args);
}

@Override
public void initialize(Bootstrap<Client2PostConfiguration> bootstrap) {
    bootstrap.addBundle(new MultiPartBundle());
}

@Override
public void run(Client2PostConfiguration configuration,
                Environment environment) throws Exception {

    environment.jersey().register(MultiPartFeature.class);

    final Client client = new JerseyClientBuilder(environment).using(configuration.getJerseyClientConfiguration()).build(getName());

    environment.jersey().register(new Client2Post(client));

    environment.jersey().register(new MyPostResource()); 

    }
}

这是我的配置（Client2PostConfiguration.java）：

public class Client2PostConfiguration extends Configuration {

    @Valid
    @NotNull
    private JerseyClientConfiguration jerseyClient = new JerseyClientConfiguration();

    @JsonProperty("jerseyClient")
    public JerseyClientConfiguration getJerseyClientConfiguration() {
        return jerseyClient;
    }
}

现在，帖子后服务（MyPostResource.java）：

@Path("/testpost")

public class MyPostResource {

    public MyPostResource() {

    }

    @POST
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    @Timed
    public String test(
        @FormDataParam("foo") String testData) throws IOException {
        return testData;
    }
}

最后，客户端（Client2Post.java）：

@Produces(MediaType.TEXT_PLAIN)
@Path("/client")
public class Client2Post {

    private Client client;

    public Client2Post(Client client) {
        this.client = client;
    }

    @GET
    @Path("/test")
    public String testPost() {

    final Invocation.Builder request = client.target("http://localhost:8080/testpost").register(MultiPartFeature.class).request();

    final FormDataMultiPart entity = new FormDataMultiPart()
            .field("foo", "bar");

    final String response = request.post(Entity.entity(entity, entity.getMediaType()), String.class);

    return response;

    }
}

我希望能够通过http://localhost:8080/client/test进行GET并获得http://localhost:8080/testpost的回复，在这种情况下，回复为“bar”。但是我收到“HTTP 400 Bad Request”。

我做错了什么？

我如何测试邮政服务？因为我使用的是firefox插件，所以HttpRequester使用这个多部分内容：

--l3iPy71otz
Content-Disposition: form-data; name="foo"
bar
--l3iPy71otz--

......我得到同样的回应。

Answer 1

我在https://github.com/dropwizard/dropwizard/issues/1094找到了问题的解决方案。对于Jersey客户端中的请求，似乎应禁用chunked编码以使用MIME Multipart。

所以我的Client2PostApplication.java现在是：

public class Client2PostApplication extends Application<Client2PostConfiguration> {
    public static void main(String[] args) throws Exception {
        new Client2PostApplication().run(args);
    }

    @Override
    public void initialize(Bootstrap<Client2PostConfiguration> bootstrap) {
        bootstrap.addBundle(new MultiPartBundle());
    }

    @Override
    public void run(Client2PostConfiguration configuration,
                Environment environment) throws Exception {

        environment.jersey().register(MultiPartFeature.class);
        JerseyClientConfiguration conf = configuration.getJerseyClientConfiguration();

        conf.setChunkedEncodingEnabled(false); //This line is new!!!

        final Client client = new JerseyClientBuilder(environment).using(conf).build(getName());
        environment.jersey().register(new Client2Post(client));
        environment.jersey().register(new MyPostResource());       
    }
}

它有效地工作。可以在https://github.com/esparig/dwclient2post

中检索代码

使用dropwizard的客户端和帖子Web服务

1 个答案: