chrome.filesystem save file without prompt location

问题:

can i save file in custom location (/home/Users/user1/) with name file1.txt.

I have this code:

chrome.fileSystem.chooseEntry({type:'openDirectory'}, function(entry) {     chrome.fileSystem.getWritableEntry(entry, function(entry) {         entry.getFile('file1.txt', {create:true}, function(entry) {             entry.createWriter(function(writer) {                 writer.write(new Blob(['Lorem'], {type: 'text/plain'}));             });         });     }); }); 

With this code, i get prompt so i need to choose directory, but i want without that, i wanna declare directory location in settings.

Any solution for this?

EDIT

According to accepted answer from @Xan :

// set location $('#location_field').on('click', function(){     chrome.fileSystem.chooseEntry({type:'openDirectory'}, function(entry) {         chrome.storage.sync.set({'print_location': chrome.fileSystem.retainEntry(entry)});     }); });  // get location  var print_location = null; chrome.storage.sync.get({     print_location: null }, function(items){     chrome.fileSystem.restoreEntry(items.print_location, function(entry){         print_location = entry;     }); });  // save file chrome.fileSystem.getWritableEntry(print_location, function(entry) {     entry.getFile('file1.txt', {create:true}, function(entry) {         entry.createWriter(function(writer) {             writer.write(new Blob(['Lorem'], {type: 'text/plain'}));         });     }); }); 

回答1:

No. You cannot pre-select a path to be readable/writable - it always has to go through a user confirmation to gain the Entry object. Consider it a security feature.

However, if you declare the "retainEntries" sub-permission, you can ask only once and then reuse the entry.

See documentation for retainEntry and restoreEntry.

Also, you may try to provide a suggestedName for chooseEntry if you know where you want it to ideally be. I'm not sure if it will work if you provide an absolute path though.

文章来源: chrome.filesystem save file without prompt location