HTTPS归档在Apache Camel中

Question

I need to access a HTTPS Resource which is using Basic Authentication and It is a GET Resource. I have written a code in java using URIBuilder and adding the username, password etc as Headers to the URIBuilder and using Apache HTTPClient to access the resource and it is working well.

Now my requirement is to implement the same functionality using Apache Camel , Well I tried using Camel HTTP component and by using Java DSL .

The problem is I am just able to provide the URI . But how can I add various Headers to this URI ?.

Answer 1

I suggest you use the http4 component as a way to consume this secure resource. From reading the docs of the component you can see it's possible to set the query parameters, path and even uri at runtime.

In answer to your specific question, the headers on the exchange at the point it reaches the .to() will be sent as headers in the HTTP request so you may want to define a header filter strategy. It has support for http basic auth and you can set your credentials via the authUsername and authPassword headers. You may need to provide a custom HttpContext because you're authenticating via https as it suggests at the bottom of the docs. For example:

from("direct:in")
    .process(new Processor() {
        public void process(Exchange exchange) {
            //These headers you set here will get sent with the http request in the to() after this processor
            exchange.getIn().setHeader("authUsername", "username");
            exchange.getIn().setHeader("authPassword", "password");
        }
    })
    .to("https4://uri.com);

Answer 2

Use the simple language to add headers if you are using blueprint or the java dsl if its pure java. Simple example:

from("direct:start")
  .setHeader(Exchange.HTTP_METHOD, constant(org.apache.camel.component.http4.HttpMethods.POST))
  .to("http4://www.google.com")
  .to("mock:results");