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From: David Birdsong <david.birdsong@gmail.com>
Date: Tue, 3 Feb 2015 16:28:20 -0800
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Subject: Re: help w/ md5sum PUT
To: Eric Wong <e@80x24.org>
Cc: mogile@googlegroups.com, cmogstored-public@bogomips.org
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On Tue, Feb 3, 2015 at 4:24 PM, David Birdsong <david.birdsong@gmail.com>
wrote:

>
>
> On Tue, Feb 3, 2015 at 4:20 PM, Eric Wong <e@80x24.org> wrote:
>
>> David Birdsong <david.birdsong@gmail.com> wrote:
>> > On Tue, Feb 3, 2015 at 3:59 PM, David Birdsong <
>> david.birdsong@gmail.com>
>> > wrote:
>> >
>> > > Hi Eric, I'm troubleshooting my client that's PUTing to cmogstored and
>> > > getting 400 response codes.
>> > >
>> > > If I supply a header:
>> > > Content-MD5: MJH_pL-pTjsfQV4PiYDLFA==
>>
>> How are you generating that base64?
>>
>> I could be wrong, but it the '_' (underscore) is not a part of the
>> normal set of characters used by base64.  Perhaps you're using a base64
>> variant? (there's one URL-friendly variant, at least)
>>
>> It doesn't look like the gnulib base64 module (which cmogstored uses)
>> handles underscore... (warning: I'm sleep deprived and haven't touched
>> a computer in a few days, so maybe I'm missing something, too)
>>
>
> It's from Golang's base64 package:
> return base64.URLEncoding.EncodeToString(m.checksum.Sum(nil))
>
> ...but yeah, here's python's re-encoding:
> >>> base64.urlsafe_b64encode(
> base64.decodestring('MJH_pL-pTjsfQV4PiYDLFA=='))
>
> 'MJHpLpTjsfQV4PiYDLFA'
>
>
> I'll try playing around with other Go encoding methods.
>

Ok, I swapped in base64.StdEncoding and it worked.
http://golang.org/pkg/encoding/base64/#pkg-index

I expected the base64.URLEncoding to be the way to go.

Case closed.

Thanks!