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https://issues.apache.org/jira/browse/CAMEL-4693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13602466#comment-13602466
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Craig Flockhart commented on CAMEL-4693:
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The documentation for the http4 component still contains: "The solution was to
set the following URI option: httpClient.authenticationPreemptive=true", which
produces "Unknown parameters=[{authenticationPreemptive=true}]" in Camel 2.10.4.
> http4 Component not exposing HttpContext
> ----------------------------------------
>
> Key: CAMEL-4693
> URL: https://issues.apache.org/jira/browse/CAMEL-4693
> Project: Camel
> Issue Type: Improvement
> Components: camel-http
> Affects Versions: 2.8.2
> Reporter: Jeff Segal
> Assignee: Claus Ibsen
> Fix For: 2.9.2, 2.10.0
>
> Attachments: http4-httpContext.patch
>
>
> HttpComponents 4.x provides a facility to use a HttpContext for a given
> request by calling HttpClient.execute(HttpUriRequest, HttpContext), but it
> looks like the http4 Camel Component doesn't have hooks to use this. Looking
> at the latest source of org.apache.camel.component.http4.HttpProducer, I only
> see one way of calling HttpClient.execute():
> protected HttpResponse executeMethod(HttpUriRequest httpRequest) throws
> IOException {
> return httpClient.execute(httpRequest);
> }
> Perhaps this could be made available in a similar fashion to
> HttpClientConfigurer? (for example creating a HttpContextConfigurer)
> My particular symptom is that I'm unable to force the http4 component to use
> preemptive authentication, which relies on HttpContext in HttpClient 4.x. In
> HttpClient 3.x, this was made possible by the HttpClientParams flag
> "authenticationPreemptive". However, it appears that this was removed for 4.x
> in favor of using HttpContext because of security concerns.
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