Apache Camel http to http routing (Is it possible?

问题:

I am starting now with Camel. I have seen the http4 component for http clients and the jetty component for http servers.

I have seen several examples that use one or the other. I would like to know if it is possible to combine them together.

Example

from("jetty:http://0.0.0.0:8080/myapp/myservice")
.to("http4://www.google.com");

This would make camel a simple http based router/proxy. Web browsers would hit the camel URL and instead get google. (Google is just an example, I have a real POST based service that I want to use)

Is this route possible? Should I research Camel or do I need a different software framework for this? In the future I would also need to add transformations/filters in between.

I have tried it and got a nullpointer exception

[qtp757856402-14] SendProcessor       DEBUG >>>> Endpoint[http4://www.google.com] Exchange[Message: [Body is instance of java.io.InputStream]]
[qtp757856402-14] DefaultErrorHandler DEBUG Failed delivery for exchangeId: ID-IT12-53265-1302683969823-0-1. On delivery attempt: 0 caught: java.lang.NullPointerException
[qtp757856402-14] DefaultErrorHandler ERROR Failed delivery for exchangeId: ID-IT12-53265-1302683969823-0-1. Exhausted after delivery attempt: 1 caught: java.lang.NullPointerException
java.lang.NullPointerException

回答1:

You need to bridge the endpoint.

from("jetty:http://0.0.0.0:8080/myapp/myservice")
.to("http4://www.google.com?bridgeEndpoint=true&throwExceptionOnFailure=false");