Apache HttpClient 4.3.5设置代理 [英] Apache HttpClient 4.3.5 set proxy

问题描述

当我用以下方法构造新的HttpClient时，我似乎可以指定代理:

It seems that I can specify the proxy when I construct new HttpClient with:

HttpHost proxy = new HttpHost("someproxy", 8080);
DefaultProxyRoutePlanner routePlanner = new DefaultProxyRoutePlanner(proxy);
CloseableHttpClient httpclient = HttpClients.custom()
    .setRoutePlanner(routePlanner)
    .build();

取自 http://hc.apache. org/httpcomponents-client-ga/tutorial/html/connmgmt.html#d5e475

是否可以修改现有客户端的代理设置.

Is it possible to modify existing client's proxy settings.

推荐答案

您可以创建自己的HttpRoutePlanner实现，该实现将允许更改HttpHost.

You can create your own implementation of HttpRoutePlanner that will allow change of the HttpHost.

public class DynamicProxyRoutePlanner implements HttpRoutePlanner {

    private DefaultProxyRoutePlanner defaultProxyRoutePlanner = null;

    public DynamicProxyRoutePlanner(HttpHost host){
        defaultProxyRoutePlanner = new DefaultProxyRoutePlanner(host);
    }

    public void setProxy(HttpHost host){
        defaultProxyRoutePlanner = new DefaultProxyRoutePlanner(host);
    }

    public HttpRoute determineRoute(HttpHost target, HttpRequest request, HttpContext context) {
        return defaultProxyRoutePlanner.determineRoute(target,request,context); 
    }
}

然后，您可以在代码中使用此DynamicProxyRoutePlanner

Then you can use this DynamicProxyRoutePlanner in your code

HttpHost proxy = new HttpHost("someproxy", 8080);
DynamicProxyRoutePlanner routePlanner = new DynamicProxyRoutePlanner(proxy);
CloseableHttpClient httpclient = HttpClients.custom()
    .setRoutePlanner(routePlanner)
    .build();

//Any time change the proxy 
routePlanner.setProxy(new HttpHost("someNewProxy", 9090));

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