Fixing HttpClient warning “Invalid expires attribute” using fluent API

问题

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.

回答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();

回答2:

If you want to use HttpClientBuilder you can use the following sytax:

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

回答3:

For the developers don't want to think on the object model, wrapping the HttpClient for a RestTemplate might be used as below ( as @comiventor mentioned above especially for Spring Boot Developers).

a Customizer for RestTemplate,

public class RestTemplateStandardCookieCustomizer 
                         implements RestTemplateCustomizer {

    @Override
    public void customize(final RestTemplate restTemplate) {

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

        restTemplate.setRequestFactory(
          new HttpComponentsClientHttpRequestFactory(httpClient)
        );
    }
}

and using it with the RestTemplate Builder

var restTemplate = restTemplateBuilder.additionalCustomizers(
            new RestTemplateStandardCookieCustomizer()
        ).build();

回答4:

Solved with:

System.setProperty("org.apache.commons.logging.simplelog.log.org.apache.http.client.protocol.ResponseProcessCookies", "fatal");

来源：https://stackoverflow.com/questions/36473478/fixing-httpclient-warning-invalid-expires-attribute-using-fluent-api

标签

apache-commons-httpclient