问题
I'm creating a Chrome extension that needs to store a lot of data. I've set the unlimitedStorage permission, and I'm successfully storing information using calls to chrome.storage.local.set. However, I'm unable to make calls to chrome.storage.local.get. When I make a call as simple as chrome.storage.local.get(null, () => {}), Chrome crashes.
My issue seems similar to chrome.storage.local.get limit, except that that issue was about a much smaller amount of data, and turned out to be a fluke. When I call chrome.storage.local.getBytesInUse(null, i => console.log(i)), I get a result of 176031461. (Admittedly, 180 MB is a lot more than Chrome extensions should typically use, but this extension will be running on my own machine.)
I'd like to be able to save all of this data into a JSON file, but to do that, it seems I need to bring it into memory first, and the only way to do that is through chrome.storage.local.get. I'm trying to use the method described at Chrome Extension: Local Storage, how to export to download the data, but it doesn't even get to the callback function. I'm not sure what's causing it to crash, and I don't think it's a memory limit, given that I've followed the instructions at Max memory usage of a chrome process (tab) & how do I increase it? to increase Chrome's max memory to 4 GB.
One potential solution would be to set the first parameter to something other than null and download the data in chunks, but I'd rather not do that if I don't have to.
My questions are:
- What is the limit to the amount of storage that can be retrieved this way?
- Is there any way for me to get all of that data at once without crashing?
- Is there a better way for me to be saving files from a Chrome extension?
来源：https://stackoverflow.com/questions/53264706/how-can-i-retrieve-lots-of-data-in-chrome-storage-local