Using URI that contains underscore with Camel HTTP4

Question

We are trying to use Apache Camel 2.16.3 to push some data to a third-party HTTP endpoint. We are using HTTP4 Component. We are setting the uri, method and query params as headers in the message. However, the endpoint contains an underscore (_) and we are getting an exception like this:

Caused by: java.lang.IllegalArgumentException: Invalid uri: https://x_y.something.com/somePath?q_one=XXXX&q_two=YYYYY. If you are forwarding/bridging http endpoints, then enable the bridgeEndpoint option on the endpoint: Endpoint[https4://placeholder?throwExceptionOnFailure=false]

I have been researching a bit and it looks like that _ is something that should not be there in the URI. This website actually says that https://x_y.something.com/somePath is invalid but https://xy.something.com/somePath is valid.

Since I cannot change the third-party endpoint, is it possible to escape the underscore somehow? If not, is there any other solution or we need to abandon Apache Camel for this?

Answer 1

EDIT Without seeing a code example I cannot be sure what the root cause is, but if I understand correctly, you are sending an HTTP request to an akka actor which is consuming from a Camel endpoint. My guess is that you're probably not populating the headers correctly - regardless of what the original HTTP4 endpoint looks like, Exchange.HTTP_URI header override will always take precedence. For example, this works perfectly fine:

from("jetty:http://localhost:9090/path")
    .routeId("jetty_server")
    .log("${body}");

from("timer:sender?delay=3000&period=5000")
    .setBody().constant("Ping!")
    .setHeader(Exchange.HTTP_URI, constant("http://localhost:9090/path"))
    .to("http4:x_y.something.com:9090/path?q_one=XXXX&q_two=YYYYY");

So my guess is that it's not a Camel issue.