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https://issues.apache.org/jira/browse/HTTPCLIENT-795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12629467#action_12629467
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Michael Andersen commented on HTTPCLIENT-795:
---------------------------------------------
Aah. Sorry, should have done that first. The problem appears resolved.
Thanks
Michael
> If there is more than 15 seconds between HttpClient.execute() calls using a
> MultipartEntity, a ProtocolException is thrown complaining about the
> Content-Length header already being present.
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HTTPCLIENT-795
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-795
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient
> Affects Versions: 4.0 Alpha 4
> Environment: Linux, java version "1.6.0_06" Java(TM) SE Runtime
> Environment (build 1.6.0_06-b02) Java HotSpot(TM) Client VM (build 10.0-b22,
> mixed mode). Also using HttpCore-4.0-beta2
> Reporter: Michael Andersen
> Fix For: 4.0 Beta 1
>
>
> I am not sure if this time-related behaviour is intentional or not (I have
> only been using this library for a few weeks) , but even if a timeout is to
> be expected, the exception thrown ought to indicate that there is a time
> component involved. "org.apache.http.ProtocolException: Content-Length header
> already present" is incredibly misleading.
> A simple-ish compileable program to reproduce the bug is as follows:
> import java.nio.charset.Charset;
> import org.apache.http.HttpResponse;
> import org.apache.http.client.methods.HttpPost;
> import org.apache.http.client.params.ClientPNames;
> import org.apache.http.client.params.CookiePolicy;
> import org.apache.http.entity.mime.MultipartEntity;
> import org.apache.http.entity.mime.content.StringBody;
> import org.apache.http.impl.client.DefaultHttpClient;
> public class Simple {
> static public void main(String [] args)
> {
> try
> {
> DefaultHttpClient client = new DefaultHttpClient();
> client.getParams().setParameter(
> ClientPNames.COOKIE_POLICY,
> CookiePolicy.BROWSER_COMPATIBILITY);
> MultipartEntity entity;
> StringBody stringBody;
> HttpPost post;
> HttpResponse response;
> entity = new MultipartEntity();
> stringBody = new StringBody("field
> contents",Charset.forName("ISO-8859-1"));
> entity.addPart("field", stringBody);
> post = new HttpPost("http://localhost/simple.php";);
> post.setEntity(entity);
> response = client.execute(post);
>
> //The exception does not occur if the content is not consumed
> response.getEntity().consumeContent();
> System.out.println("First post done");
>
> //The exception does not occur if the time interval between the
> requests is too short
> Thread.sleep(15000);
>
> //The exception naturally doesn't occur if a new HttpClient is
> created
> //client = new DefaultHttpClient();
> entity = new MultipartEntity();
> stringBody = new StringBody("field
> contents",Charset.forName("ISO-8859-1"));
> entity.addPart("field", stringBody);
> post = new HttpPost("http://localhost/simple.php";);
> post.setEntity(entity);
> response = client.execute(post); //Will throw the following:
> /*
> org.apache.http.ProtocolException: Content-Length header
> already present
> at
> org.apache.http.protocol.RequestContent.process(RequestContent.java:70)
> at
> org.apache.http.protocol.BasicHttpProcessor.process(BasicHttpProcessor.java:290)
> at
> org.apache.http.protocol.HttpRequestExecutor.preProcess(HttpRequestExecutor.java:160)
> at
> org.apache.http.impl.client.DefaultClientRequestDirector.execute(DefaultClientRequestDirector.java:356)
> at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:501)
> at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:456)
> at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:422)
> at test.Simple.main(Simple.java:57)
> */
> System.out.println("Second post done");
> }
> catch(Exception e)
> {
> System.out.println(e);
> e.printStackTrace();
> }
> }
> }
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