Database in Chrome Packaged Apps

Question

I have been trying to implement a local database in a packaged app which does not seem to be working.

I tried using PouchDB which is a layer over IndexedDB and then I tried using the native IndexedDB API. Both don't work and I receive the same message: An attempt was made to break through the security policy of the user agent.

I Googled about database methods for packaged apps but only found info on how to use the FileSystem API .

Any links pointing towards database implementation on Chrome packaged apps will be really helpful (or just let me know if I am doing something wrong).

Sample code to initiate IndexedDB:

idbSupported = false;
db = '';    
if("indexedDB" in window) {
    idbSupported = true;
}
if(idbSupported) {
    var openRequest = indexedDB.open("test",1);

    openRequest.onupgradeneeded = function(e) {
        console.log("Upgrading...");
    }

    openRequest.onsuccess = function(e) {
        console.log("Success!");
        db = e.target.result;
    }

    openRequest.onerror = function(e) {
        console.log("Error");
        console.dir(e);
    }
}

Permissions inside manifest file

"permissions": ["http://*/*", "https://*/*","storage","fileSystem"]

Answer 1

也许尝试以下权限：

"permissions": ["storage", "<all_urls>", "unlimitedStorage"]

Answer 2

Perhaps you were using some earlier version of Chrome, but I am able to use IndexedDB without any permissions at all, as it's not a Chrome Platform API. My app is a normal Chrome App -- no additional sandboxing. I didn't understand your comment, so maybe you have it working. If so, it would be nice to post the answer and mark it so this thread is properly wrapped up.

Answer 3

You have to provide unlimited storage for inside the manifest.json

To see a complete offline implementation ( local) of a chrome indexeddb app, based on the HTML5Rocks to do article,check out this github project

https://github.com/abdullahc/Indexeddb-Chrome-App