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Library for generating PDFs and images from online webmapping services

There is a newer version: 3.22.0

package org.mapfish.print.http;

import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.impl.conn.DefaultRoutePlanner;
import org.apache.http.protocol.HttpContext;
import org.mapfish.print.config.Configuration;
import org.mapfish.print.processor.http.matcher.MatchInfo;
import org.springframework.http.HttpMethod;

import java.net.MalformedURLException;
import java.net.SocketException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.UnknownHostException;
import java.util.List;

/**
 * A Route planner that obtains proxies from the configuration that is currently in {@link
 * org.mapfish.print.http.MfClientHttpRequestFactoryImpl#CURRENT_CONFIGURATION}.
 * 
 * {@link MfClientHttpRequestFactoryImpl.Request} will set the correct configuration before the request is
 * executed so that correct proxies will be set.
 */
public final class MfRoutePlanner extends DefaultRoutePlanner {
    /**
     * Constructor.
     */
    public MfRoutePlanner() {
        super(null);
    }

    @Override
    protected HttpHost determineProxy(
            final HttpHost target,
            final HttpRequest request,
            final HttpContext context) throws HttpException {
        Configuration config = MfClientHttpRequestFactoryImpl.getCurrentConfiguration();
        if (config == null) {
            return null;
        }
        final URI uri;
        try {
            uri = new URI(request.getRequestLine().getUri());
        } catch (URISyntaxException e) {
            throw new RuntimeException(e);
        }
        HttpMethod method = HttpMethod.valueOf(request.getRequestLine().getMethod());

        final List proxies = config.getProxies();
        for (HttpProxy proxy: proxies) {
            try {
                if (proxy.matches(MatchInfo.fromUri(uri, method))) {
                    return proxy.getHttpHost();
                }
            } catch (SocketException | UnknownHostException | MalformedURLException e) {
                throw new HttpException(e.getMessage(), e);
            }
        }
        return null;
    }
}