From: Pat Patterson <Andrew.Patterson@...>
Date: 2007-03-14T08:43:06+09:00
Subject: Re: Ruby Newbie Problems with deflate, base64...

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Thanks, Brian! That revealed an obvious bug in the code I was using to 
examine the deflated data (should have been 0.upto(deflated.length-1)).

So Base64 /is/ working correctly. Deflate prepends 2 bytes (seems to be 
constant 0x789c for default deflate level) and appends 4 bytes (rather 
than 1 and 5 as I thought) to the deflated data. When I cut those off, I 
can get Ruby to work the same as PHP.

Still - it would be nice if deflate worked the same as on Java, PHP, ...

Cheers,

Pat

Brian Candler wrote:
> On Tue, Mar 13, 2007 at 01:21:52PM +0900, Pat Patterson wrote:
>   
>> While the Ruby
>>
>> deflated = Zlib::Deflate.deflate( "Hello world" )
>> myhex = ""
>> 1.upto(deflated.length) { |i| myhex << "%02x" % deflated[i] }
>> puts myhex
>>
>> Shows
>>
>> 9cf348cdc9c95728cf2fca49010018ab043d00
>>
>> (BTW - if anyone knows a more succinct way to hex encode a string in 
>> Ruby, that would be useful)
>>     
>
> str = "\001\377"
> puts str.unpack("H*")
>   
-- 
Pat Patterson - pat.patterson@sun.com
Federation Architect,
Sun Microsystems, Inc.
http://blogs.sun.com/superpat


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