RESTEasy（一个 JAX-RS 实现）有一个不错的 client framework，例如：
RegisterBuiltin.register(ResteasyProviderFactory.getInstance());
SimpleClient client = ProxyFactory.create(SimpleClient.class, "http://localhost:8081");
client.putBasic("hello world");
如何设置 HTTP 标头？
澄清：
jkeeler 提出的解决方案是一个很好的方法，但我想在 ProxyFactory 级别设置 HTTP 标头，我不想将标头传递给客户端对象。有什么想法吗？
【问题讨论】：
标签： java http-headers jax-rs resteasy
在您的客户端代理界面中，使用@HeaderParam 注释：
public interface SimpleClient
{
@PUT
@Path("basic")
@Consumes("text/plain")
public void putBasic(@HeaderParam("Greeting") String greeting);
}
上面示例中的调用将添加一个如下所示的 HTTP 标头：
Greeting: hello world
【讨论】：
我找到了解决办法：
import org.apache.commons.httpclient.HttpClient;
import org.jboss.resteasy.client.ClientRequest;
import org.jboss.resteasy.client.ClientResponse;
import org.jboss.resteasy.client.ProxyFactory;
import org.jboss.resteasy.client.core.executors.ApacheHttpClientExecutor;
import org.jboss.resteasy.plugins.providers.RegisterBuiltin;
import org.jboss.resteasy.spi.ResteasyProviderFactory;
RegisterBuiltin.register(ResteasyProviderFactory.getInstance());
HttpClient httpClient = new HttpClient();
ApacheHttpClientExecutor executor = new ApacheHttpClientExecutor(httpClient) {
@Override
public ClientResponse execute(ClientRequest request) throws Exception {
request.header("X-My-Header", "value");
return super.execute(request);
}
};
SimpleClient client = ProxyFactory.create(SimpleClient.class, "http://localhost:8081", executor);
client.putBasic("hello world");
【讨论】：
executor 变量作为参数传递给ProxyFactory.create() 方法。
在 RestEasy 3.x 中，我使用 ClientRequestFilters。在下面的示例中，有一个持续集成 (CI) 服务器侦听在后台运行的请求。测试和 CI 服务器使用相同的数据库和实体类。
假设确实存在名为“test-tenant”的租户，并且存在属于该租户的用户“root”，并且该用户具有下面指定的密码。
private static final String BASE_URI = "http://localhost:" + PORT;
@Test(groups = "functionalTests")
public void testGetTenant() throws Exception {
Client client = ClientBuilder.newClient();
ResteasyWebTarget target = (ResteasyWebTarget)client.target(BASE_URI);
client.register(new AddAuthHeadersRequestFilter("root", "DefaultPasswordsAre:-("));
TenantResource resource = target.proxy(TenantResource.class);
RestTenant restTenant = resource.getTenant(tenant.id().value().toString());
assertThat(restTenant.getName(), is("test-tenant"));
assertThat(restTenant.isActive(), is(true));
}
还有 AddAuthHeadersRequestFilter 类：
public static class AddAuthHeadersRequestFilter implements ClientRequestFilter {
private final String username;
private final String password;
public AddAuthHeadersRequestFilter(String username, String password) {
this.username = username;
this.password = password;
}
@Override
public void filter(ClientRequestContext requestContext) throws IOException {
String token = username + ":" + password;
String base64Token = Base64.encodeBase64String(token.getBytes(StandardCharsets.UTF_8));
requestContext.getHeaders().add("Authorization", "Basic " + base64Token);
}
}
导入语句（假设您只是将测试和静态类粘贴到单个 TestNg 测试类文件中）：
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import org.jboss.resteasy.client.jaxrs.ResteasyWebTarget;
import org.testng.annotations.Test;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import javax.ws.rs.client.ClientRequestContext;
import javax.ws.rs.client.ClientRequestFilter;
import org.apache.commons.codec.binary.Base64;
【讨论】：
更简单：
ResteasyClient client = new ResteasyClientBuilder().build();
ResteasyWebTarget target = client.target("https://test.com");
Response response = target.request().header("Authorization", "Basic test123")
.acceptEncoding("gzip, deflate")
.post(Entity.entity(some_xml, "application/x-www-form-urlencoded"));
【讨论】：