[jira] [Created] (HTTPCLIENT-2185) Add support for IDNA 2008 (RFC 5891)

["Julien Bernard (Jira)" <ji...@apache.org>]

Julien Bernard created HTTPCLIENT-2185:
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             Summary: Add support for IDNA 2008 (RFC 5891)
                 Key: HTTPCLIENT-2185
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2185
             Project: HttpComponents HttpClient
          Issue Type: Bug
          Components: Android Port, HttpClient (async), HttpClient (classic), HttpClient (Windows)
    Affects Versions: 5.0
         Environment: Android SDK 30
            Reporter: Julien Bernard


The tests have been conducted with Kotlin on Android SDK 30 with Apache HttpClient Android extensions which ships with HttpClient version 5.0.1 but any HttpClient component on any platform may be impacted.

Before making an HTTP query the client should convert the URL domain to A-label as described in [RFC 5891|https://datatracker.ietf.org/doc/html/rfc5891].

Here is an example with the trustworthy ICU4J library:
 
{code:java}
int flags = IDNA.CHECK_BIDI
       | IDNA.CHECK_CONTEXTJ
       | IDNA.CHECK_CONTEXTO
       |  IDNA.NONTRANSITIONAL_TO_ASCII
       | IDNA.USE_STD3_RULES;
IDNA idna = IDNA.getUTS46Instance(flags);
IDNA.Info info = new IDNA.Info();
String domainAscii = idna.nameToASCII(domain, new StringBuilder(), info);
// check error with info.hasErrors() {code}
 



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