[jira] [Reopened] (HTTPCLIENT-1123) Implement a way to override or resolve DNS entries defined in the OS

["Alin Vasile (Reopened) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-1123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alin Vasile reopened HTTPCLIENT-1123:
-------------------------------------



PoolingClientConnectionManager constructor doesn't pick the provided dns resolver, but instead always goes with SystemDefaultDnsResolver:

public PoolingClientConnectionManager(final SchemeRegistry schemeRegistry,
                final long timeToLive, final TimeUnit tunit,
                final DnsResolver dnsResolver) {
        super();
        if (schemeRegistry == null) {
            throw new IllegalArgumentException("Scheme registry may not be null");
        }
        this.schemeRegistry = schemeRegistry;
        this.dnsResolver  = new SystemDefaultDnsResolver();
        this.operator = createConnectionOperator(schemeRegistry);
        this.pool = new HttpConnPool(this.log, 2, 20, timeToLive, tunit);
    }
                
> Implement a way to override or resolve DNS entries defined in the OS
> --------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-1123
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1123
>             Project: HttpComponents HttpClient
>          Issue Type: New Feature
>          Components: HttpClient
>            Reporter: Alin Vasile
>            Priority: Minor
>             Fix For: 4.2 Alpha1
>
>         Attachments: dns_overrider_poc.patch, dns_overrider_poc.patch, dns_resolver.patch, dns_resolver.patch, dns_resolver.patch, dns_system_resolver.patch
>
>
> When working with HttpClient in restrictive environments, where the user doesn't have the permissisions to edit the local /etc/hosts file or the DNS configuration, can be eased with an DNS Overrider capability. 
> This can be useful with JMeter which can follow redirects automatically and resolve some of the redirected hosts against its configuration. Another example is a custom forward proxy, written in Java and based on httpclient, which can be deployed is such a restricted environment that would ease the development of various web solutions for some developers. 

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