Re: [Exist-development] zip:update

[Alister P. <gsp...@gm...>]

Hi Joe,
I will submit a pull request, but I’m concerned because my additions don’t match the spec. 
This zip:update function matches my own use-case - replacing one file in a zip, where the zip is stored in the database and the content is possibly in-memory. 


On 24 Jul 2014, at 11:02 am, Joe Wicentowski <jo...@gm...> wrote:

> Alister,
> 
> Great!  Have you considered submitting your work as a pull request?
> 
> Joe
> 
> Sent from my iPhone
> 
>> On Jul 23, 2014, at 6:29 PM, Alister Pillow <gsp...@gm...> wrote:
>> 
>> I’ve added a zip:update function to my clone of the expath zip module. (I desperately need this function in eXist 2.x - to replace a module I wrote for 1.2 and 1.4)
>> https://github.com/gspringtech/exist
>> 
>> (There’s also a minimal zip:entries function - not so useful considering what’s available in the compression: module.)
>> 
>> zip:update( $href as xs:anyURI, $paths as xs:string+, $binaries as xs:base64Binary+ ) as xs:base64Binary?
>> 
>> The function will replace existing content or add new content to a zip file. This is not the same as the specified zip:update-entries() - which would be difficult to use as well as hard to code.
>> 
>> I’ve chosen an href for the source file - so that it can be processed as a stream - but couldn’t quite figure out how to do the same for the binaries. In my use case, the updated content would be generated and not stored.
>> 
>> Example: 
>> 
>> xquery version “1.0";
>> let $odt := '/db/Job-Listing.odt'
>> let $content := '/db/new-content.xml'
>> let $binary-content := util:string-to-binary(util:serialize(doc($content),"method=xml"))
>> let $test-binary:= util:string-to-binary(util:serialize(<doc>Something else</doc>,"method=xml”))
>> 
>> let $updated := zip:update(xs:anyURI($odt),("content.xml","test/test.xml"), ($binary-content, $test-binary ))
>> 
>> return xmldb:store("/db","updated.odt",$updated)
>> 
>> 
>> I haven’t written zip:zip-file (which creates a new Zip file) because that functionality already exists in the compression module.
>> 
>> I guess that the way forward is to follow the new EXPath Archive spec.
>> 
>> Regards,
>> Alister.
>> 
>> 
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