On 25 January 2015 at 10:58, Benedikt Ritter <brit...@apache.org> wrote:
> Hello sebb,
>
> 2015-01-24 13:16 GMT+01:00 sebb <seb...@gmail.com>:
>
>> On 24 January 2015 at 12:01,  <brit...@apache.org> wrote:
>> > Author: britter
>> > Date: Sat Jan 24 12:01:20 2015
>> > New Revision: 1654500
>> >
>> > URL: http://svn.apache.org/r1654500
>> > Log:
>> > VALIDATOR-358: Underscores in domain names are not supported. This fixes
>> #3 from github. Thanks to Nykolas Laurentino de Lima.
>>
>> -1
>>
>> This is not supported by the RFCs I have seen.
>>
>> AFAICT underscore is supported in DNS labels.
>>
>
> I've looked at RCF2181 [1] - Clarifications to the DNS Specification,
> section 11 - Name syntax:
>
> "The DNS itself places only one restriction on the particular labels that
> can be used to identify resource records. That one restriction relates to
> the length of the label and the full name. [...] Implementations of the DNS
> protocols must not place any restrictions on the labels that can be used.
> In particular, DNS servers must not refuse to serve a zone because it
> contains labels that might not be acceptable to some DNS client programs."
>
> What am I missing?

What I wrote below.

> Benedikt
>
> [1] http://www.ietf.org/rfc/rfc2181.txt
>
>
>>
>> However that does not imply they are supported in hostnames and URLs.

i.e. DNS is a lot more permissive than hostnames allow.
DNS is used for more than just hostname resolution.

http://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_host_names

>>
>> Unless a relevant RFC shows otherwise, this commit needs to be reworked.
>>
>> Either reverted entirely, or allowing underscore must be optional, and
>> not allowed by default.
>>
>> > Modified:
>> >     commons/proper/validator/trunk/src/changes/changes.xml
>> >
>>  
>> commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/DomainValidator.java
>> >
>>  
>> commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/UrlValidator.java
>> >
>>  
>> commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/EmailValidatorTest.java
>> >
>>  
>> commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/UrlValidatorTest.java
>> >
>> > Modified: commons/proper/validator/trunk/src/changes/changes.xml
>> > URL:
>> http://svn.apache.org/viewvc/commons/proper/validator/trunk/src/changes/changes.xml?rev=1654500&r1=1654499&r2=1654500&view=diff
>> >
>> ==============================================================================
>> > --- commons/proper/validator/trunk/src/changes/changes.xml (original)
>> > +++ commons/proper/validator/trunk/src/changes/changes.xml Sat Jan 24
>> 12:01:20 2015
>> > @@ -43,6 +43,9 @@ The <action> type attribute can be add,u
>> >    <body>
>> >
>> >    <release version="1.5.0" date="tba" description="tba">
>> > +    <action issue="VALIDATOR-356" dev="britter" type="fix"
>> due-to="Nykolas Laurentino de Lima">
>> > +      Underscores in domain names are not supported
>> > +    </action>
>> >      <action issue="VALIDATOR-356" dev="seb" type="fix" >
>> >        IDN.toASCII drops trailing dot in Java 6 & 7
>> >      </action>
>> >
>> > Modified:
>> commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/DomainValidator.java
>> > URL:
>> http://svn.apache.org/viewvc/commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/DomainValidator.java?rev=1654500&r1=1654499&r2=1654500&view=diff
>> >
>> ==============================================================================
>> > ---
>> commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/DomainValidator.java
>> (original)
>> > +++
>> commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/DomainValidator.java
>> Sat Jan 24 12:01:20 2015
>> > @@ -69,7 +69,7 @@ public class DomainValidator implements
>> >
>> >      // RFC2396: domainlabel   = alphanum | alphanum *( alphanum | "-" )
>> alphanum
>> >      // Max 63 characters
>> > -    private static final String DOMAIN_LABEL_REGEX =
>> "\\p{Alnum}(?>[\\p{Alnum}-]{0,61}\\p{Alnum})?";
>> > +    private static final String DOMAIN_LABEL_REGEX =
>> "\\p{Alnum}(?>[\\p{Alnum}-_]{0,61}\\p{Alnum})?";
>> >
>> >      // RFC2396 toplabel = alpha | alpha *( alphanum | "-" ) alphanum
>> >      // Max 63 characters
>> >
>> > Modified:
>> commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/UrlValidator.java
>> > URL:
>> http://svn.apache.org/viewvc/commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/UrlValidator.java?rev=1654500&r1=1654499&r2=1654500&view=diff
>> >
>> ==============================================================================
>> > ---
>> commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/UrlValidator.java
>> (original)
>> > +++
>> commons/proper/validator/trunk/src/main/java/org/apache/commons/validator/routines/UrlValidator.java
>> Sat Jan 24 12:01:20 2015
>> > @@ -133,7 +133,7 @@ public class UrlValidator implements Ser
>> >      // Drop numeric, and  "+-." for now
>> >      // TODO does not allow for optional userinfo.
>> >      // Validation of character set is done by isValidAuthority
>> > -    private static final String AUTHORITY_CHARS_REGEX =
>> "\\p{Alnum}\\-\\.";
>> > +    private static final String AUTHORITY_CHARS_REGEX =
>> "\\p{Alnum}\\-\\._";
>> >
>> >      private static final String AUTHORITY_REGEX =
>> >              "^([" + AUTHORITY_CHARS_REGEX + "]*)(:\\d*)?(.*)?";
>> >
>> > Modified:
>> commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/EmailValidatorTest.java
>> > URL:
>> http://svn.apache.org/viewvc/commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/EmailValidatorTest.java?rev=1654500&r1=1654499&r2=1654500&view=diff
>> >
>> ==============================================================================
>> > ---
>> commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/EmailValidatorTest.java
>> (original)
>> > +++
>> commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/EmailValidatorTest.java
>> Sat Jan 24 12:01:20 2015
>> > @@ -468,6 +468,6 @@ public class EmailValidatorTest extends
>> >          assertTrue(validator.isValid("a...@abc.com"));
>> >          assertTrue(validator.isValid("abc-...@abc.com"));
>> >          assertTrue(validator.isValid("abc_...@abc.com"));
>> > -        assertFalse(validator.isValid("abc@abc_def.com"));
>> > +        assertTrue(validator.isValid("abc@abc_def.com"));
>> >      }
>> >  }
>> >
>> > Modified:
>> commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/UrlValidatorTest.java
>> > URL:
>> http://svn.apache.org/viewvc/commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/UrlValidatorTest.java?rev=1654500&r1=1654499&r2=1654500&view=diff
>> >
>> ==============================================================================
>> > ---
>> commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/UrlValidatorTest.java
>> (original)
>> > +++
>> commons/proper/validator/trunk/src/test/java/org/apache/commons/validator/routines/UrlValidatorTest.java
>> Sat Jan 24 12:01:20 2015
>> > @@ -441,6 +441,7 @@ public class UrlValidatorTest extends Te
>> >                                 new ResultPair("", true)};
>> >
>> >     ResultPair[] testUrlAuthority = {new ResultPair("www.google.com",
>> true),
>> > +                                                                 new
>> ResultPair("my_domain.s3.amazonaws.com", true),
>> >                                    new ResultPair("go.com", true),
>> >                                    new ResultPair("go.au", true),
>> >                                    new ResultPair("0.0.0.0", true),
>> >
>> >
>>
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>
>
> --
> http://people.apache.org/~britter/
> http://www.systemoutprintln.de/
> http://twitter.com/BenediktRitter
> http://github.com/britter

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