I'm a Systems Reliability and DevOps engineer for Netdata Inc. When not working, I enjoy studying linguistics and history, playing video games, and cooking all kinds of international cuisine.
The 'upload' issue is actually a non-issue even without the FS API. You can (on a vast majority of modern browsers) pull off a 'fake' upload in any number of ways that works just fine without hitting the remote server.
Downloads are the big issue, because the current behavior of web browsers does not allow for apps to hint the browser that links should use 'Save As' behavior (but, FWIW, downloads don’t actually need to hit the server either, you can use either a Data URI (if the file is small enough) or the Blob API to generate a 'donwload' client side).
The 'upload' issue is actually a non-issue even without the FS API. You can (on a vast majority of modern browsers) pull off a 'fake' upload in any number of ways that works just fine without hitting the remote server.
Downloads are the big issue, because the current behavior of web browsers does not allow for apps to hint the browser that links should use 'Save As' behavior (but, FWIW, downloads don’t actually need to hit the server either, you can use either a Data URI (if the file is small enough) or the Blob API to generate a 'donwload' client side).
There's at least github.com/jimmywarting/StreamSave... (or for older browsers github.com/eligrey/FileSaver.js), it actually took me longer to figure out "uploading" files locally than saving files.