代理设置不适用于 Spring WebClient

问题描述

我的以下 WebClient 在 Internet 连接下工作正常，但不能通过我们的代理连接.

My following WebClient is working fine with internet connection but not through our proxy connection.

WebClient webClient = WebClient.builder()
        .baseUrl("https://targetsite.com")
        .build();

webClient.post()
    .uri("/service/serviceName")
    .body(BodyInserters.fromObject(reqData))
    .retrieve()
    .bodyToMono(WebServiceResponse.class)

尽管如此，同一个客户端正在通过代理工作，如果我按如下所述进行设置，

Event though, the same client is working through proxy, if I set it as mentioned below,

HttpClient httpClient = HttpClient.create()
            .tcpConfiguration(tcpClient -> tcpClient
                .proxy(proxy -> proxy
                    .type(ProxyProvider.Proxy.HTTP)
                    .host("ourproxy.com")
                    .port(8080)));

ReactorClientHttpConnector connector = new ReactorClientHttpConnector(httpClient);

WebClient webClient = WebClient.builder()
        .clientConnector(connector)
        .baseUrl("https://targetsite.com")
        .build();

webClient.post()
    .uri("/service/serviceName")
    .body(BodyInserters.fromObject(reqData))
    .retrieve()
    .bodyToMono(WebServiceResponse.class)

但是如果我使用 System.setProperty("http.proxyHost","ourproxy.com"); 设置相同的代理详细信息；System.setProperty("http.proxyPort","8080");或JVM 运行时参数 -Dhttp.proxyHost=ourproxy.com -Dhttp.proxyPort=8080

But if I set the same Proxy details either using System.setProperty("http.proxyHost","ourproxy.com");System.setProperty("http.proxyPort","8080");orJVM run-time arguments -Dhttp.proxyHost=ourproxy.com -Dhttp.proxyPort=8080

WebClient webClient = WebClient.builder()
        .baseUrl("https://targetsite.com")
        .build();

System.setProperty("http.proxyHost", "ourproxy.com");
System.setProperty("http.proxyPort", "8080");

webClient.post()
    .uri("/service/serviceName")
    .body(BodyInserters.fromObject(reqData))
    .retrieve()
    .bodyToMono(WebServiceResponse.class)

调用因 UnknownHostException 而失败，例如

The calls are getting failed with UnknownHostException like,

[04/11/2019 12:32:43.031 IST] DEBUG [reactor-http-epoll-3] [PooledConnectionProvider:254] - Creating new client pool [http] for targetsite.com:443
[04/11/2019 12:32:43.033 IST] DEBUG [reactor-http-epoll-3] [PooledConnectionProvider:254] - [id: 0xe4a0dc15] Created new pooled channel, now 0 active connections and 1 inactive connections
[04/11/2019 12:32:43.045 IST] DEBUG [reactor-http-epoll-3] [SslProvider:254] - [id: 0xe4a0dc15] SSL enabled using engine SSLEngineImpl and SNI targetsite.com:443
[04/11/2019 12:32:43.046 IST] DEBUG [reactor-http-epoll-3] [BootstrapHandlers:254] - [id: 0xe4a0dc15] Initialized pipeline DefaultChannelPipeline{(reactor.left.sslHandler = io.netty.handler.ssl.SslHandler), (reactor.left.sslReader = reactor.netty.tcp.SslProvider$SslReadHandler), (BootstrapHandlers$BootstrapInitializerHandler#0 = reactor.netty.channel.BootstrapHandlers$BootstrapInitializerHandler), (SimpleChannelPool$1#0 = io.netty.channel.pool.SimpleChannelPool$1), (reactor.left.httpCodec = io.netty.handler.codec.http.HttpClientCodec), (reactor.left.decompressor = io.netty.handler.codec.http.HttpContentDecompressor), (reactor.right.reactiveBridge = reactor.netty.channel.ChannelOperationsHandler)}
[04/11/2019 12:32:43.165 IST] ERROR [reactor-http-epoll-2] [AbstractErrorWebExceptionHandler:117] - [13ebf1eb] 500 Server Error for HTTP POST "/service/serviceName"
java.net.UnknownHostException: targetsite.com: Name or service not known

请帮忙，如果我通过 JVM 运行时参数或系统属性设置代理详细信息，为什么我的代码不起作用.

Please help, why my code is not functioning if I set the proxy details via JVM run-time arguments or system properties.

实际上我想避免代码级代理设置.所以请指导我更正我的代码或方法，以便我可以使用 JVM 运行时参数选项.

Actually I want to avoid code level proxy setting. So please guide me to correct my code or approach, so that I can use JVM run-time argument option.

推荐答案

后来当我向 reactor-netty 团队提出这个问题时(https://github.com/reactor/reactor-netty/issues/887#issuecomment-549439355)，他们确认，系统属性不是由 reactor.netty.http.client.HttpClient 支持.唯一的选择是通过 tcpConfiguration 设置它，我已经在我的问题中提到过；所以我用这个评论结束这个问题.

Later when I raised this concern with reactor-netty team(https://github.com/reactor/reactor-netty/issues/887#issuecomment-549439355), it was confirmed by them that, system properties are not supported by reactor.netty.http.client.HttpClient. The only option is setting it through tcpConfiguration, which I mentioned in my question already; so I am closing this question with this remarks.

谢谢大家

这篇关于代理设置不适用于 Spring WebClient的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！