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Subject: Re: [ebxml-msg] LZJU90 Compressed Encoding
Doug,
I know that HTTP is totally fine with gzip and other binary
formats...many web servers even support sending gzipped documents to
clients that request it. I also know that many (most?) SMTP servers
support 8 bit, but that cannot be guaranteed. I was looking for
something that I could propose to the group that would work
universally, perhaps optionally allowing the SOAP envelope attachment
to be compressed as well as payloads via the transfer encoding header.
The reason I was looking at LZJU90 was that it defines compression that
encodes. All the compression algos I looked at produced binary output
that would not be SMTP friendly, causing mail servers to feel compelled
to do some encoding themselves.
-Matt
On Monday, January 13, 2003, at 09:53 AM, Doug Bunting wrote:
> Matt,
>
> Is this specifically for SMTP? I'm wondering about the gzip'd HTTP
> option. I'm not sure how widely deployed that option might be but
> wonder if a similar option is available now that many (most?) SMTP
> implementations are (supposedly) 8 bit clean. Must admit I'm not sure
> the UTF-8 emails I've received were not base64 encoded on the wire.
>
> I guess this is a bunch of questions: Are you focused on SMTP? Does
> modern SMTP support a compression option that doesn't require base64
> encoding? Is that option widely available?
>
> thanx,
> doug
>
> Matthew MacKenzie wrote:
>
>> On Saturday, January 11, 2003, at 11:05 AM, William J. Kammerer
>> wrote:
>>
>>> Sounds fascinating. Let us know if you find out more. But I would
>>> think it really isn't necessary anymore considering that ZIP is such
>>> a
>>> ubiquitous format - a BASE64 encoded ZIPped attachment serves the
>>> same
>>> purpose, doesn't it?
>>
>>
>> It serves the same purpose, but Base64 adds ~33% to the unencoded
>> file size, plus the added CPU overhead of both decoding and
>> unzipping. I'm looking for something better.
>>
>> Regards,
>>
>> Matt
>>
>>
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