[jira] Closed: (MIME4J-62) Unnecessary qp encoding of SPACE and TAB characters in CodecUtil

["Niklas Therning (JIRA)" <se...@james.apache.org>]

     [ https://issues.apache.org/jira/browse/MIME4J-62?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Niklas Therning closed MIME4J-62.
---------------------------------


> Unnecessary qp encoding of SPACE and TAB characters in CodecUtil
> ----------------------------------------------------------------
>
>                 Key: MIME4J-62
>                 URL: https://issues.apache.org/jira/browse/MIME4J-62
>             Project: Mime4j
>          Issue Type: Bug
>    Affects Versions: 0.4
>            Reporter: Niklas Therning
>            Priority: Minor
>             Fix For: 0.4
>
>         Attachments: TextAttachmentEncodingTest.java
>
>
> ATM we always encode SPACE and TAB. The result is that the output of the encoding is longer than necessary. According to the MIME RFC:
> (3)   (White Space) Octets with values of 9 and 32 MAY be
>           represented as US-ASCII TAB (HT) and SPACE characters,
>           respectively, but MUST NOT be so represented at the end
>           of an encoded line.  Any TAB (HT) or SPACE characters
>           on an encoded line MUST thus be followed on that line
>           by a printable character.  In particular, an "=" at the
>           end of an encoded line, indicating a soft line break
>           (see rule #5) may follow one or more TAB (HT) or SPACE
>           characters.  It follows that an octet with decimal
>           value 9 or 32 appearing at the end of an encoded line
>           must be represented according to Rule #1.  This rule is
>           necessary because some MTAs (Message Transport Agents,
>           programs which transport messages from one user to
>           another, or perform a portion of such transfers) are
>           known to pad lines of text with SPACEs, and others are
>           known to remove "white space" characters from the end
>           of a line.  Therefore, when decoding a Quoted-Printable
>           body, any trailing white space on a line must be
>           deleted, as it will necessarily have been added by
>           intermediate transport agents.
> To make the encoded output as short as possible we should try to not encode SPACE and TAB unless they are the last character in a line.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


---------------------------------------------------------------------
To unsubscribe, e-mail: server-dev-unsubscribe@james.apache.org
For additional commands, e-mail: server-dev-help@james.apache.org