Re: [Resteasy-users] Set http headers per request on client side proxy

[Ron S. <rs...@re...>]

Hi Veit,

One option is to install a ClientRequestFilter, which can access request 
headers before a request is sent. For example,,

    static class TestRequestFilter implements ClientRequestFilter
    {
       String value;

       public void setValue(String value)
       {
          this.value = value;
       }

       @Override
       public void filter(ClientRequestContext requestContext) throws 
IOException
       {
          MultivaluedMap<String, Object> mmap = requestContext.getHeaders();
          List<Object> list = new ArrayList<Object>();
          list.add(value);
          mmap.put("TestHeader", list);
       }
    }

which could be used as follows:

       ResteasyClient client = new ResteasyClientBuilder().build();
       TestRequestFilter filter = new TestRequestFilter();
       client.register(filter);
       ResteasyWebTarget target = 
client.target("http://localhost:8081/post");
       TestResource tr = target.proxy(TestResource.class);
       filter.setValue("abc");
       Assert.assertEquals("abc", tr.post("hello 1")); // Resource 
returns value of header
       filter.setValue("xyz");
       Assert.assertEquals("xyz", tr.post("hello 1"));

I've attached an example program, TestProxy.java.

-Ron

> Hi.
>
> How can I set http headers when invoking methods on the client side proxy?
> I'm aware that I can e.g. set credentials on the underlying HttpClient.
> I do that once
> before creating the proxy. But when using the proxy, I have to change
> some http headers
> on every request as well. So, what's the best practive for that?
>
> Thanks for your help!
> Veit