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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Commented] (CAMEL-9462) HTTP 1.1 Host header be dealt wrongly in proxy & load balancer
Date Thu, 07 Apr 2016 11:51:25 GMT


ASF GitHub Bot commented on CAMEL-9462:

GitHub user erwelch opened a pull request:

    CAMEL-9462 HTTP 1.1 Host header be dealt wrongly in proxy & load balancer


You can merge this pull request into a Git repository by running:

    $ git pull CAMEL-9462

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #935
commit dfc6ee1098745518ca5db5aefef9f5b0f19b934d
Author: Edward Welch <>
Date:   2016-04-07T11:48:16Z

    Adding a new endpoint property to the HttpCommonEndpoint which allows preserving the Host
header in reverse proxy applications, this class is ued by the Http, Http4, and Jetty producers.
    Updated the HttpProducer (Jetty/HTTP4) to set the Host header when this flag is enabled.
 The older HTTP component does not readily let us override the Host header, this component
will not support this parameter
    Updated the Integration Test to validate the behavior for both when the new parameter
is set, and unset.


> HTTP 1.1 Host header be dealt wrongly in proxy & load balancer
> --------------------------------------------------------------
>                 Key: CAMEL-9462
>                 URL:
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-http, camel-http4
>    Affects Versions: 2.9.5, 2.10.3, 2.11.0
>            Reporter: Ian Hu
>             Fix For: 2.17.1, 2.18.0
> I have wrote code below make camel as a load balancer, but camel-http4(and the camel-http,
etc) deal the http header Host wrongly, it replace the Host header with the host name of the
backend of balancer, that make the backend generate the wrong link.
> {|borderStyle=solid}
> import org.apache.camel.impl.DefaultCamelContext;
> import org.apache.camel.model.RouteDefinition;
> public class Main {
>     public static void main(String[] args) throws Exception {
>         DefaultCamelContext context = new DefaultCamelContext();
>         RouteDefinition route = new RouteDefinition();
>         route.from("jetty:")
>                 .loadBalance().roundRobin()
>                 .to("http4://")
>                 .to("http4://");
>         //
>         context.addRouteDefinition(route);
>         context.start();
>     }
> }
> {code}
> I have view the code and found a fix of [](See
the commit), it's commits simply removed the host header [].
and I really do not think it should be dealt like that.
> Some backend will use the Host header to generate link, and when the Host header removed
and then it be set to the backend's host, the backend got the wrong Host, and generate the
wrong link.
> I expect the link should be http://localhost:8080/web but it generate
or when I view the page with the url http://localhost:8080

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