Base 64 Binary

[gkipe]

I am trying to pass a SOAP attachment in Base 64 Binary format. How would I open a file in this format?

Thanks,
Garet

[marten]

I am trying to pass a SOAP attachment in Base 64 Binary format. How would I open a file in this format?

Thanks,
Garet

It's a binary file, which content is converted to base64. This is done to make it possible to send binary data within eMails
or non-binary (7 bits) transport ways. Its just a way to represent a binary file in an ascii oriented way.

In VASmalltalk there are two classes, which can handle (convert to/from) this format: SstBase64Coder and AbtBase64Coder.

If you need conversions like this very often, you may also consider wrapping external c libraries doing this jobs very much faster than pure Smalltalk code. One way to do this is to use the Base64 AP called defined in Gnome (even under Windows).

Marten

[wembley]

In VASmalltalk there are two classes, which can handle (convert to/from) this format: SstBase64Coder and AbtBase64Coder.

You should use AbtBase64Coder since it is the replacement for SstBase64Coder (which is depricated).

[gkipe]

Is AbtBase64Coder supported by 5.5.2? ( managment decision, dont ask ). I'm not finding the class.
Thanks.

[wembley]

I don't believe it was in VAST 5.5.2. The code is the same in the 2 classes, we just promoted it from SST to the Base somewhere along the line.

[gkipe]

Marten,
I see that you posted on Feb. 12, 2007 about creating a VA Wrapper for base64 support, and that its fast and available for download. Can I get a link from you so I can play around with your wrapper. Thanks in advance. -Garet

[marten]

Marten,
I see that you posted on Feb. 12, 2007 about creating a VA Wrapper for base64 support, and that its fast and available for download. Can I get a link from you so I can play around with your wrapper. Thanks in advance. -Garet

I have uploaded it at http://vastgoodies.com/ - you also need glib (gnome), which contains the wrapped API calls.

Marten

[gkipe]

Too funny, I just got my call to g_base64_encode function in libglib-2.0-0.dll working. A little slow for files over 1MB, but workable.
Thanks, I'll go grab your goodies anyway and check it out. Thanks -Garet

[marten]

Too funny, I just got my call to g_base64_encode function in libglib-2.0-0.dll working. A little slow for files over 1MB, but workable.
Thanks, I'll go grab your goodies anyway and check it out. Thanks -Garet

"A little slow for files over 1MB" ? I was surprised about this statement. I have now wrapped the libb64 library mentioned at wikipedia - which the author claimed to be very fast - and encoded a (ByteArray-) stream with a size of about 25 MB:

* glib needs around 300 ms to do the work
* libb64 needs around 1200 ms to do the work (using Watcom 1.
* AbtBase64Coder needs around 12800 ms to do the work

Seems to be pretty good !?

Marten