IPP Mail Archive: IPP> IPP Bake-Off 3 Implementation specifi

IPP Mail Archive: IPP> IPP Bake-Off 3 Implementation specifi

IPP> IPP Bake-Off 3 Implementation specific issues (5)

From: Zehler, Peter (Peter.Zehler@usa.xerox.com)
Date: Thu Oct 26 2000 - 14:52:58 EDT

  • Next message: Zehler, Peter: "IPP> IPP Bake-Off 3 Issue 6"

    All,
    These are all the issues that are assumed to be isolated implementation
    mistakes that will be handled by the limited number of implementations
    affected. Anyone wishing to raise these or revisit the resolutions are free
    to do so.

    BO3-IMP-1: Some Clients did not allow password lengths greater than 8
    characters. These clients should be corrected

    BO3-IMP-2: Some Printers did not handle multiple operations across a single
    connection. IPP uses HTTP 1.1 and therefore IPP Printers must handle more
    than one request across a connection.

    BO4-IMP-3: Some Clients did not properly decode the attribute syntax
    textwithlanguage. The Clients recognized that it is an implementation
    problem.

    BO3-IMP-4: Some Printers would return all printer attributes even when only
    one unsupported attribute was requested. The Printers recognized this was
    an implementation problem.

    BO3-IMP-5: Some Clients had problems accepting IPP responses that did not
    include the HTTP status message. Is the HTTP status message required in the
    IPP response.
                    Proposed response: IPP Client software should not parse the
    reason phrase per rfc2068 section 6.1.1
                    "The Status-Code element is a 3-digit integer result code of
    the
                       attempt to understand and satisfy the request. These
    codes are fully defined in section 10. The Reason-Phrase is intended to give
    a short textual description of the Status-Code. The Status-Code is intended
    for use by automata and the Reason-Phrase is intended for the human user.
                    ...
                    The reason phrases listed here are only recommended -- they
    may be replaced by local equivalents without affecting the protocol."
                    Also, note that the Printer should be sending a reason
    phrase per rfc2068 section 6.1
                    "The first line of a Response message is the Status-Line,
    consisting of the protocol version followed by a numeric status code and its
    associated textual phrase, with each element separated by SP characters. No
    CR or LF is allowed except in the final CRLF sequence.
                    Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase
    CRLF"

                                    Peter Zehler
                                    XEROX
                                    Xerox Architecture Center
                                    Email: Peter.Zehler@usa.xerox.com
                                    Voice: (716) 265-8755
                                    FAX: (716) 265-8792
                                    US Mail: Peter Zehler
                                            Xerox Corp.
                                            800 Phillips Rd.
                                            M/S 139-05A
                                            Webster NY, 14580-9701



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