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https://issues.apache.org/jira/browse/CB-10492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Ginchereau resolved CB-10492.
-----------------------------------
Resolution: Won't Fix
Web workers don't have access to most of the script context. That includes all
the script objects injected by Cordova plugins.
Unfortunately the design of Cordova is restricted by the limitations of web
workers. Cordova cannot simply provide plugin APIs to web workers because the
mechanism that plugins use to communicate with their native-code counterparts
is also not available in a web worker context. I think a hypothetical
implementation would require an elaborate mechanism to automatically marshal
all plugin API calls and results between the web worker and the main UI thread.
But that's not something Cordova aspires to do as far as I know.
See also some recent discussion of this issue here:
http://stackoverflow.com/questions/28642547/phonegap-and-webworkers
> File System API missing in web workers
> --------------------------------------
>
> Key: CB-10492
> URL: https://issues.apache.org/jira/browse/CB-10492
> Project: Apache Cordova
> Issue Type: Bug
> Components: Plugin File
> Environment: all
> Reporter: Jim Mont
> Labels: file, filesystem, javascript, triaged, worker
>
> All File system APIs (provided by cordova-plugin-file) appear to be missing
> in web workers. Oddly I can make XMLHttpRequests of the filesystem with file
> urls in workers.
> In the main view running the following suggests there is no access to the
> filesystem directly:
> {code:javascript}
> var blob = new Blob(["onmessage = function(e) { var res, fn, msg; try{ fn =
> new Function(e.data); res = fn(); msg = JSON.stringify(res); }catch(err){ msg
> = JSON.stringify(err); }; postMessage(msg+' <> '+fn); }"]);
> var blobURL = window.URL.createObjectURL(blob);
> var worker = new Worker(blobURL);
> worker.onmessage = function(e) {
> console.log('worker',e)
> };
> worker.postMessage('return 1+1');
> worker.postMessage('return self.File');
> worker.postMessage('return self.requestFileSystem');
> {code}
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