Ian Hu created CAMEL-9462:
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Summary: HTTP 1.1 Host header be dealt wrongly in proxy & load
balancer
Key: CAMEL-9462
URL: https://issues.apache.org/jira/browse/CAMEL-9462
Project: Camel
Issue Type: Bug
Components: camel-http, camel-http4
Affects Versions: 2.11.0, 2.10.3, 2.9.5
Reporter: Ian Hu
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.
{code:title=Main.java|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:http://0.0.0.0:8080/?matchOnUriPrefix=true";)
.loadBalance().roundRobin()
.to("http4://127.0.0.1:8081/?bridgeEndpoint=true&throwExceptionOnFailure=false")
.to("http4://127.0.0.1:8082/?bridgeEndpoint=true&throwExceptionOnFailure=false");
//
context.addRouteDefinition(route);
context.start();
}
}
{code}
I have view the code and found a fix of
[https://issues.apache.org/jira/browse/CAMEL-5757](See the commit), it's
commits simply removed the host header
[https://fisheye6.atlassian.com/browse/camel-git/components/camel-http4/src/main/java/org/apache/camel/component/http4/HttpProducer.java?hb=true#to106].
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
http://127.0.0.1:8081/web or http://127.0.0.1:8082/web when I view the page
with the url http://localhost:8080
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