Hi, My understanding of your requirement is you want to list out all files and directories under EXTERNAL_CACHEDIR in a html page, something like a file manager, right? If my understanding correctly, Yes, you can do it. But native file system API doesn’t provide UI component. The UI component should implement by developers.
Sincerely, Shawn From: Matt Bargar [mailto:[email protected]] Sent: Friday, August 15, 2014 8:39 PM To: Gao, Shawn Cc: Min, Hongbo; [email protected]; Huo, Halton Subject: Re: [Crosswalk-help] Accessing file system Hi- I'm using the native file system API (xwalk.experimental) -- I do have success reading/writing files and folders using this API. The use case I'm trying to make work is having an html file with arbitrary content (javascript, css, images etc) in the "EXTERNAL_CACHEDIR", and having some way to point to all of this content, so, from my index.html file, I could (for example) open an iframe to this html file and see its contents "automatically". Does that make sense? Is there any way to achieve that? Thanks! -Matt On Thu, Aug 14, 2014 at 9:54 PM, Gao, Shawn <[email protected]<mailto:[email protected]>> wrote: Hi, Matt, Which file API are you tried, native file system API or w3c file API? Crosswalk has native file system API besides w3c file API, which can read/write/mange file out of sandbox. Here demos the usage of this API, https://github.com/crosswalk-project/crosswalk/blob/master/test/android/data/native_file_system.html. Crosswalk restricts the ability of native file system API for security reason. Only following path is opened for Android app developer, • ALARMS • DCIM • DOWNLOADS • MOVIES • MUSIC • NOTIFICATIONS • PICTURES • PODCASTS • RINGTONES • CACHEDIR # Cache directory of your app • EXTERNAL_CACHEDIR # External cache directory of your app Thanks, Shawn From: Min, Hongbo Sent: Friday, August 15, 2014 9:27 AM To: Matt Bargar; [email protected]<mailto:[email protected]> Cc: Huo, Halton; Gao, Shawn Subject: RE: [Crosswalk-help] Accessing file system + Halto and Shawn ________________________________ From: Crosswalk-help [[email protected]<mailto:[email protected]>] on behalf of Matt Bargar [[email protected]<mailto:[email protected]>] Sent: Friday, August 15, 2014 3:22 AM To: [email protected]<mailto:[email protected]> Subject: [Crosswalk-help] Accessing file system Hi- We're working on a Crosswalk app, and have a question. We are planning on writing a Crosswalk extension that deals with expansion files. At a high level, this theoretical extension would have two main tasks: 1. checking to make sure any necessary OBB files were downloaded correctly, and, in our case, unzipping the OBB file somewhere 2. providing a path to where the files were unzipped. One of the tasks we know will need to be accomplished is reading files (html, css, images, audio) from the file system, after the expansion file has been unzipped. We have investigated the File API, and it's great for what it does! We are able to successfully read in images and text and deal with them from the javascript side (adding them to the DOM, etc.) However, our ideal use case would be to be able to point Crosswalk to the unzipped expansion file (presumably mounted on /sdcard/ somewhere, we could get the path from the Java side) and have it read html files natively. i.e., we would have a /www/ folder in our expansion file, and we could direct Crosswalk to display files inside that /www/ folder (in an iframe, for example). What would be the best approach to this? We have tried various forms of file:///<file:///\\> URLs (we always get "Not allowed to load local resource:" errors in the Chrome logs) and app:/// URLs (we get a 403 Forbidden if we try to reach outside our app's sandbox). We are currently using Canary (9.37.192.0). Thanks for any help you can give us! -Matt Bargar
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