I'm trying to make use of the file system API in a Chrome App. I've tried all the sample code I can find and can't get a simple text file to read. I'm logging almost every step, and what seems to happen (or not happen) is everything stops the first time I reference a file reader object. It creates just fine, because I can log the .readyState, but after that I can't seem to even set an onload()event or execute a .readAsText().
Here's what I'm calling from a button:
function clickButton(){
chrome.fileSystem.chooseEntry({type: 'openFile', acceptsMultiple: false}, function(FileEntry){
if(chrome.runtime.lastError) {console.warn("Warning: " + chrome.runtime.lastError.message);}
else{
console.log(FileEntry);
var thing = new FileReader();
console.log(thing.readyState);
thing.onloadstart(function(){
console.log("Started loading " & FileEntry);
});
console.log("added onloadstart");
console.log(thing.readyState);
console.log(thing);
thing.readAsText(FileEntry);
console.log(thing.readyState);
console.log(thing.result);
}
});
document.getElementById("status").innerHTML = "I did something";
}
I did read somewhere that Chrome doesn't allow access to local files, but the chrome apps seem to be different. At least, the documentation seems to suggest that.
The only thing I end up with in my console is the FileEntry object.
https://developer.chrome.com/apps/app_storage#filesystem
I've used the example code right from the above link and still can't get it right. Anyone else have this issue or know what I'm doing wrong?
There is a difference between a FileEntry and a File. You need to call FileEntry's .file() method. So, replace
with
https://developer.mozilla.org/en-US/docs/Web/API/FileEntry#File