A little confuse what is really possible here.
Can Java Proxy Apache HTTP Client (4.x) Proxy? Any tips on how?
I found documentation offering it , but the source is a bit complicated, and I found at least one class ( DefaultRequestDirector) that throws an exception;
throw new HttpException("Proxy chains are not supported.")
Directly configure the client using a single proxy using
httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
but for me it’s not obvious how to set up a proxy chain. If I follow the hints in the documentation above, I do the following.
httpClient.setRoutePlanner(new HttpRoutePlanner() {
@Override
public HttpRoute determineRoute(HttpHost target, HttpRequest request, HttpContext context) throws HttpException {
return new HttpRoute(target, null, new HttpHost[]{proxy, new HttpHost("localhost", 8081)}, "https".equalsIgnoreCase(target.getSchemeName()), TunnelType.TUNNELLED, LayerType.PLAIN);
}
});
but this raises the exception mentioned above;
org.apache.http.client.ClientProtocolException
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:822)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:754)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:732)
at Main.main(Main.java:70)
Caused by: org.apache.http.HttpException: Proxy chains are not supported.
at org.apache.http.impl.client.DefaultRequestDirector.createTunnelToProxy(DefaultRequestDirector.java:957)
at org.apache.http.impl.client.DefaultRequestDirector.establishRoute(DefaultRequestDirector.java:764)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:579)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:425)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:820)
... 8 more
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