[Exist-development] zip:update

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

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.