Fixing HttpClient warning "Invalid expires attribute" using fluent API

Question

I'm using the fluent API of HttpClient to make a GET request:

String jsonResult = Request.Get(requestUrl)
            .connectTimeout(2000)
            .socketTimeout(2000)
            .execute().returnContent().asString();

But for each request I get the following warning:

apr 07, 2016 12:26:46 PM org.apache.http.client.protocol.ResponseProcessCookies processCookies
WARNING: Invalid cookie header: "Set-Cookie: WMF-Last-Access=07-Apr-2016;Path=/;HttpOnly;Expires=Mon, 09 May 2016 00:00:00 GMT". Invalid 'expires' attribute: Mon, 09 May 2016 00:00:00 GMT

How can I fix this and keep using the fluent interface? Ideally I'd want a proper way to fix it, but since I don't really care about the cookies in my use case any solution that just allows me to stop displaying the warnings (besides redirecting stderr, cause I need that) is welcome.

Answer 1

The default HttpClient has difficulty understanding the latest RFC-compliant headers.

Instead of hiding the warning, just switch to a standard cookie spec like this (HttpClient 4.4+):

HttpClient httpClient = HttpClients.custom()
    .setDefaultRequestConfig(RequestConfig.custom()
        .setCookieSpec(CookieSpecs.STANDARD)
        .build())
    .build();