html5-filesystem | 易学教程

“fs.createReadStream() is not a function” error(Javascript)

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问题 In my project of web development i need to use fs.createreadstream() function but >unfortunately filesystem is not availabe for browsers as of my knowledge. I tried >using level-filesystem,file-sytem,level-fs packages but everytime Im getting the >createreadstream() is not a function error .How to handle this problem??? 回答1: I believe the browserify utility will allow you to use node.js style require statements like: var fs = require('fs'); 来源： https://stackoverflow.com/questions/38468205/fs

How do I use the File System Access API from Chrome using file:// url with no http server

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问题 I want to open an html file from Chrome on my computer, without an http server, and I want the JavaScript in the HTML file to be able read and write files in the local file system, and browse directories as well. How do I do this using the File System API: https://wicg.github.io/file-system-access/ ? 回答1: File System API is not available currently in Chrome 85. For now you can launch the html file using a batch file which will locate and launch Chrome with the right appropriate command line

How do I use the File System Access API from Chrome using file:// url with no http server

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window.requestFileSystem not working

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问题 I am trying on Firefox,IE 9,Chrome and Opera the code below ,but the onInitFs(fs) function doesn't get called.if I add '()' to onInitFs in the window.requestFileSystem(window.PERSISTENT, 1024*1024, onInitFs, errorHandler) that function get called but fs is null ? Does anybody know how to solve this problem?I try on windows 7.I'll appreciate very much your help. <!DOCTYPE HTML> `<html> <head> <script> function errorHandler(e){ alert("errorrrr"); } function onInitFs(fs){ alert("onInitFs"); }

Cordova: LocalFileSystem is not defined

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问题 I am not able to get the cordova file system to work. I have a project with the following dependencies: com.ionic.keyboard 1.0.3 "Keyboard" org.apache.cordova.console 0.2.12 "Console" org.apache.cordova.device 0.2.13 "Device" org.apache.cordova.file 1.3.2 "File" org.apache.cordova.file-transfer 0.4.8 "File Transfer" In app.js I define a dependency on a controller module: angular.module('starter', ['ionic', 'controllers']); The controller code is basically this: angular.module('controllers', [

Where is the filesystem in html5 stored on the real file system?

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问题 If I use JavaScript to create a file on a HTML5 Filesystem, can I find it on the real file system of my computer? 回答1: originally I think all file is stored on a virtual file system , so files can be protected. but it's not. for chrome, file is placed at "C:\Users\user name\AppData\Local\Google\Chrome\User Data\Default\File System" with obfuscated name on windows 7. so you can operate on it as local file. 来源： https://stackoverflow.com/questions/11719816/where-is-the-filesystem-in-html5-stored

Javascript file dropping and reading directories - Asynchronous Recursion

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问题 So I'm trying to create a file dropper web application. Right now, a user can drop files on the screen and I can read them, including all the files in a directory that was dropped. But, I don't know when the script is done reading the files. Some code: This first function handles a 'drop' event and will loop through each file and send it to another function that will read its contents. function readDrop( evt ) { for( var i = 0; i < evt.dataTransfer.files.length; i++) { var entry = evt

What are the details can be obtained from webkitStorageInfo.queryUsageAndQuota()

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问题 webkitStorageInfo.queryUsageAndQuota() is used to find out the usage stats of the files that have been stored in the file system using the HTML5 file system API I suppose. Can anyone give me the details that can be obtained in the callback provided to this function. window.webkitStorageInfo.queryUsageAndQuota(webkitStorageInfo.PERSISTENT, function() { //what all details can be obtained in this function as its arguments? }) 回答1: Replace function(){...} with console.log.bind(console) , and you

where is fs.root (HTML5) in windows

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问题 I can write and read files using html5 filesystem. The file is written successfully and then read successfully as well. But i don't know the actual physical path of that. fileEntry.fullPath gieves only \log.txt as path. Can anyone tell where this file is actuall stored in my PC? If anyone want to check code, here it is: window.webkitRequestFileSystem(window.TEMPORARY, 1024 * 1024, function(fs) { // fs.root is a DirectoryEntry object. fs.root.getFile('log.txt', {create: true}, function

Chrome App, persistent FileSystem, files lost after chrome restarts

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问题 I'm developing a Chrome App which uses HTML5 FileSystem with persistent storage, my data was lost after chrome get restarted, I tested several times, 9 times out of 10 data lost after restart, I have fired an issue on Chromium site, I want to know if there is workaround or something I did mistake. here is my code: window.webkitRequestFileSystem(window.PERSISTENT, 120*1024*1024, function(fs) { function gotFileEntry(fileEntry) { fileEntry.createWriter(gotFileWriter, fail); } function