HTTP 用戶端

Spring Boot 提供了許多適用於 HTTP 用戶端的 starters。本節回答有關使用它們的問題。

配置 RestTemplate 以使用代理

如 RestTemplate 自訂中所述，您可以使用 RestTemplateCustomizer 與 RestTemplateBuilder 來建置自訂的 RestTemplate。這是建立配置為使用代理的 RestTemplate 的建議方法。

代理配置的確切細節取決於正在使用的底層用戶端請求工廠。

配置 Reactor Netty based WebClient 使用的 TcpClient

當 Reactor Netty 在類別路徑上時，會自動配置基於 Reactor Netty 的 WebClient。若要自訂用戶端處理網路連線的方式，請提供 ClientHttpConnector bean。以下範例配置了 60 秒連線逾時並新增了 ReadTimeoutHandler

  • Java

  • Kotlin

import io.netty.channel.ChannelOption;
import io.netty.handler.timeout.ReadTimeoutHandler;
import reactor.netty.http.client.HttpClient;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ReactorResourceFactory;
import org.springframework.http.client.reactive.ClientHttpConnector;
import org.springframework.http.client.reactive.ReactorClientHttpConnector;

@Configuration(proxyBeanMethods = false)
public class MyReactorNettyClientConfiguration {

	@Bean
	ClientHttpConnector clientHttpConnector(ReactorResourceFactory resourceFactory) {
		HttpClient httpClient = HttpClient.create(resourceFactory.getConnectionProvider())
				.runOn(resourceFactory.getLoopResources())
				.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 60000)
				.doOnConnected((connection) -> connection.addHandlerLast(new ReadTimeoutHandler(60)));
		return new ReactorClientHttpConnector(httpClient);
	}

}
import io.netty.channel.ChannelOption
import io.netty.handler.timeout.ReadTimeoutHandler
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.http.client.reactive.ClientHttpConnector
import org.springframework.http.client.reactive.ReactorClientHttpConnector
import org.springframework.http.client.ReactorResourceFactory
import reactor.netty.http.client.HttpClient

@Configuration(proxyBeanMethods = false)
class MyReactorNettyClientConfiguration {

	@Bean
	fun clientHttpConnector(resourceFactory: ReactorResourceFactory): ClientHttpConnector {
		val httpClient = HttpClient.create(resourceFactory.connectionProvider)
			.runOn(resourceFactory.loopResources)
			.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 60000)
			.doOnConnected { connection ->
				connection.addHandlerLast(ReadTimeoutHandler(60))
			}
		return ReactorClientHttpConnector(httpClient)
	}

}
請注意，連線提供者和事件迴圈資源使用了 ReactorResourceFactory。這確保了接收請求的伺服器和發出請求的用戶端之間有效率的資源共享。