[ruby-core:78725] [Ruby trunk Feature#13020] Zlib.gzip and Zlib.gunzip

Issue #13020 has been updated by Yui NARUSE.


Eric Wong wrote:
> [e-mail] wrote:
>  > I added Zlib.deflate/inflate [Feature #4180] before, but writing/reading gzip is still too complex.
>  > It should have shorthand method.
>  
>  I like the convenience, but I think encouraging use of
>  potentially large String buffers is dangerous.
>  
>  It causes memory problems and even opens up DoS attacks.
>  
>  So, I think it would be better if it used IO-like object
>  instead, to discourage slurping.
>  
>  Maybe make it like IO.copy_stream:
>  
>  	Zlib.gzip(src_io, dst_io)
>  	Zlib.gunzip(src_io, dst_io)
>  
>  Slurpers can still use StringIO if they want to.
>  
>  
>  In general, I am against non-streaming APIs and want to
>  encourage processing data in predictable sizes to avoid
>  fragmentation and OOM.

There's already Zlib.deflate/inflate, which are memory based API.
And gzip also uses deflate/inflate.
Note that gzip has the length of original data at the end of data. (isize=origsize / (2^32))

Anyway IO.copy_stream like API sounds reasonable.
Current API needs to change interface to use keyword arguments to avoid using 2nd argument...

----------------------------------------
Feature #13020: Zlib.gzip and Zlib.gunzip
https://bugs.ruby-lang.org/issues/13020#change-62096

* Author: Yui NARUSE
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
I added Zlib.deflate/inflate [Feature #4180] before, but writing/reading gzip is still too complex.
It should have shorthand method.



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