Created
December 29, 2014 14:22
-
-
Save rally25rs/e93e441c439eeeb82ba8 to your computer and use it in GitHub Desktop.
Cordova File API Wrapper
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
window.fileStorage = | |
save: (name, data) -> | |
deferred = $.Deferred() | |
fail = (error) => | |
deferred.reject(error) | |
gotFileSystem = (fileSystem) => | |
fileSystem.root.getFile(name, { create: true, exclusive: false }, gotFileEntry, fail) | |
gotFileEntry = (fileEntry) => | |
fileEntry.createWriter(gotFileWriter, fail) | |
gotFileWriter = (writer) => | |
writer.onwrite = () => | |
deferred.resolve() | |
writer.onerror = fail | |
writer.write(data) | |
window.requestFileSystem(window.LocalFileSystem.PERSISTENT, data.length || 0, gotFileSystem, fail) | |
return deferred.promise() | |
load: (name) -> | |
deferred = $.Deferred() | |
fail = (error) => | |
deferred.reject(error) | |
gotFileSystem = (fileSystem) => | |
fileSystem.root.getFile(name, { create: false, exclusive: false }, gotFileEntry, fail) | |
gotFileEntry = (fileEntry) => | |
fileEntry.file(gotFile, fail) | |
gotFile = (file) => | |
reader = new FileReader() | |
reader.onloadend = (evt) => | |
data = evt.target.result | |
deferred.resolve(data) | |
reader.readAsText(file) | |
window.requestFileSystem(window.LocalFileSystem.PERSISTENT, 0, gotFileSystem, fail) | |
return deferred.promise() | |
delete: (name) => | |
deferred = $.Deferred() | |
fail = (error) => | |
deferred.reject(error) | |
gotFileSystem = (fileSystem) => | |
fileSystem.root.getFile(name, { create: false, exclusive: false }, gotFileEntry, fail) | |
gotFileEntry = (fileEntry) => | |
fileEntry.remove() | |
window.requestFileSystem(window.LocalFileSystem.PERSISTENT, 0, gotFileSystem, fail) | |
return deferred.promise() |
This saved my butt. I was banging my head against the wall for the past two weeks trying to get file writing / reading working in Cordova to no avail. This code sample did it for me. Also see my fork with a few simplifications & support for traversing directories!
Thank you both for the code!
I've updated it to use standard Promises now that they're well supported.
I also added JSDoc comments and returned the filename from the fileStorage.write method.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
This code is discussed in a blog post: Using Deferreds with the Cordova File API