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From Philippe Mouawad <p.moua...@ubik-ingenierie.com>
Subject Strange behaviour when using proxy , any ideas ?
Date Thu, 13 Dec 2018 22:28:25 GMT
Hello,

We have a confirmed bug report :

   - https://bz.apache.org/bugzilla/show_bug.cgi?id=62852

It appears that when using proxy for a request, the method
request.getRequestHeaders() called on the request returned
HttpContext#getAttribute(HttpCoreContext.HTTP_REQUEST) returns only part of
the headers.

While it returns them all if not using proxy.

See:

   -
   https://github.com/apache/jmeter/blob/trunk/src/protocol/http/org/apache/jmeter/protocol/http/sampler/HTTPHC4Impl.java#L580


I tried to reproduce behavior with HTTPClient only but couldn't , so it
seems issue is somewhere in our code possibly due to interceptors or
request executor.

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package org.apache.jmeter.protocol.http.proxy;

import java.util.Arrays;

import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.client.config.RequestConfig;
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.HttpClients;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.HttpCoreContext;

/**
 * How to send a request via proxy.
 *
 * @since 4.0
 */
public class TestProxy {

    public static void main(String[] args)throws Exception {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        try {

            HttpHost target = new HttpHost("jmeter.apache.org", 80, "http");
            HttpHost proxy = new HttpHost("localhost", 8888, "http");

            RequestConfig config = RequestConfig.custom()
                    .setProxy(proxy)
                    .build();
            HttpGet request = new HttpGet("/");
            request.addHeader("X-sleep", "5");
            request.setConfig(config);

            System.out.println("Executing request " +
request.getRequestLine() + " to " + target + " via " + proxy);
            HttpContext localContext = new BasicHttpContext();
            CloseableHttpResponse response = httpclient.execute(target,
request, localContext);
            final HttpRequest httpRequestFromLocalContext = (HttpRequest)
localContext.getAttribute(HttpCoreContext.HTTP_REQUEST);
            try {

System.out.println("----------------------------------------");
                System.out.println(response.getStatusLine());
                System.out.println(Arrays.asList(request.getAllHeaders()));

System.out.println(Arrays.asList(httpRequestFromLocalContext.getAllHeaders()));
                System.out.println(Arrays.asList(response.getAllHeaders()));

//System.out.println(EntityUtils.toString(response.getEntity()));
            } finally {
                response.close();
            }
        } finally {
            httpclient.close();
        }
    }

}

OUTPUT:
----------------------------------------------------------------------------------------------------
Executing request GET / HTTP/1.1 to http://jmeter.apache.org:80 via
http://localhost:8888
----------------------------------------
HTTP/1.1 200 OK
[X-sleep: 5]
[X-sleep: 5, Host: jmeter.apache.org:80, Proxy-Connection: Keep-Alive,
User-Agent: Apache-HttpClient/4.5.6 (Java/1.8.0_161), Accept-Encoding:
gzip,deflate]
[Date: Thu, 13 Dec 2018 22:23:23 GMT, Server: Apache/2.4.18 (Ubuntu),
Last-Modified: Sun, 09 Sep 2018 15:25:54 GMT, ETag:
"3159-57571db50c67a-gzip", Accept-Ranges: bytes, Vary: Accept-Encoding,
Keep-Alive: timeout=30, max=100, Connection: Keep-Alive, Content-Type:
text/html, Content-Length: 12633]
----------------------------------------------------------------------------------------------------


Regards
Philippe M.
<https://www.openstreetmap.org/#map=18/50.69454/3.16455>

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