Client GZip Content Compression via apache http - Java Network

Java examples for Network:apache http

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Description

Client GZip Content Compression via apache http

Demo Code


import java.io.IOException;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseInterceptor;
import org.apache.http.client.entity.GzipDecompressingEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

public class ClienGZipContentCompression {

    public static void main(String[] args) {
        HttpClientBuilder hb = HttpClients.custom();

        hb.addInterceptorFirst(new HttpRequestInterceptor() {
            @Override//from  w  w  w.  j  a va 2 s  . c  o m
            public void process(HttpRequest req, HttpContext ctx)
                    throws HttpException, IOException {
                if (!req.containsHeader("Accept-Encoding")) {
                    req.addHeader("Accept-Encoding", "gzip");
                }
            }
        });

        hb.addInterceptorFirst(new HttpResponseInterceptor() {
            @Override
            public void process(HttpResponse res, HttpContext ctx)
                    throws HttpException, IOException {
                HttpEntity entity = res.getEntity();
                if (entity != null) {
                    Header contentEncoding = res
                            .getFirstHeader("Content-Encoding");
                    if (contentEncoding != null
                            && contentEncoding.getValue().equalsIgnoreCase(
                                    "gzip")) {
                        res.setEntity(new GzipDecompressingEntity(entity));
                        return;
                    }
                }
            }
        });

        HttpGet htpGet = new HttpGet("http://www.apache.org");
        try (CloseableHttpClient hc = hb.build();
                CloseableHttpResponse res = hc.execute(htpGet)) {
            System.out.println("executing request " + htpGet.getURI());

            System.out.println("----------------------------------------");
            System.out.println(res.getStatusLine());
            System.out.println(res.getLastHeader("Content-Encoding"));
            System.out.println(res.getLastHeader("Content-Length"));
            System.out.println("----------------------------------------");
            HttpEntity entity = res.getEntity();
            if (entity != null) {
                String contents = EntityUtils.toString(entity);
                System.out.println(contents);
                System.out
                        .println("----------------------------------------");
                System.out
                        .println("Uncompressed size:" + contents.length());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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