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var fs = { | |
read: (filename, cb, err) => { | |
navigator.webkitPersistentStorage.requestQuota(0, (bytes) => { | |
window.webkitRequestFileSystem(PERSISTENT, bytes, (fs) => { | |
fs.root.getFile(filename, {}, | |
(entry) => { | |
entry.file((file) => { | |
var reader = new FileReader(); | |
if(err) | |
reader.onerror = err; | |
if(cb) | |
reader.onloadend = (e) => { | |
cb(e.target.result); | |
} | |
reader.readAsText(file); | |
}); | |
}); | |
}); | |
}); | |
}, | |
write: (filename, blob, cb, err) => { | |
navigator.webkitPersistentStorage.requestQuota(blob.size, (bytes) => { | |
window.webkitRequestFileSystem(PERSISTENT, bytes, (fs) => { | |
fs.root.getFile(filename, {create:true, exclusive:false}, | |
(entry) => { | |
entry.file((file) => { | |
if(blob.size < file.size) { | |
entry.createWriter((writer) => { | |
writer.onwriteend = (e) => { | |
writer.onwriteend = null; | |
if(cb) writer.onwriteend = cb; | |
if(err) writer.onerror = err; | |
writer.write(blob); | |
} | |
writer.truncate(blob.size); | |
}); | |
} else { | |
entry.createWriter((writer) => { | |
if(cb) writer.onwriteend = cb; | |
if(err) writer.onerror = err; | |
writer.write(blob); | |
}); | |
} | |
}); | |
}); | |
}); | |
}) | |
}, | |
writeContent: (filename, content, type, cb, err) => { | |
var blob = new Blob([content], {type: type}); | |
fs.write(filename, blob, cb, err); | |
}, | |
writeText: (filename, text, cb, err) => { | |
fs.writeContent(filename, text, "text/plain", cb, err); | |
} | |
} |
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