Javascript 在 Chrome 扩展程序中写入本地文件系统
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Writing to local file system in Chrome extension
提问by Derek
chrome.tabs.onUpdated.addListener(checkForValidUrl);
function checkForValidUrl(tabId, changeInfo, tab) {
if (tab.url.indexOf('https') > -1) {
var tabURL = tab.url;
console.log("\n<TimeStamp>" + getTimestamp() + "</TimeStamp><Browser>Chrome</Browser><URL>" + tabURL + "</URL>\n");
window.requestFileSystem(window.PERSISTENT, 5 * 1024 * 1024, initFs);
function initFs(fs) {
fs.root.getFile
('log.txt', { create: true, exclusive: true }, function (fileEntry) {
fileEntry.isFile = true;
fileEntry.name = 'log.txt';
fileEntry.fullPath = '/log.txt';
fileEntry.createWriter(function (fileWriter) {
fileWriter.seek(fileWriter.length);
var bb = new BlobBuilder();
bb.append("\n<TimeStamp>" + getTimestamp() + "</TimeStamp><Browser>Chrome</Browser><URL>" + tabURL + "</URL>\n");
fileWriter.write(bb.getBlob('text/plain'));
});
});
}
}
}
回答by HBP
Based on this:
基于此：
At the time of writing this article, Google Chrome 9+ has the only working implementation of the FileSystem API. Since a dedicated browser UI does not yet exist for file/quota management, the API cannot be used without running Chrome with the --unlimited-quota-for-files flag (Note: if you're building an app or extension for the Chrome Web Store, the unlimitedStorage manifest file permission will suffice).
在撰写本文时，Google Chrome 9+ 拥有 FileSystem API 的唯一有效实现。由于尚不存在用于文件/配额管理的专用浏览器 UI，因此如果不运行带有 --unlimited-quota-for-files 标志的 Chrome，则无法使用该 API（注意：如果您正在为 Chrome 构建应用程序或扩展程序Web Store，unlimitedStorage 清单文件权限就足够了）。
found at http://www.html5rocks.com/tutorials/file/filesystem/#toc-support
在http://www.html5rocks.com/tutorials/file/filesystem/#toc-support找到
I assume you are using Chrome and that you have not set the --unlimited-quota-for-files flag
我假设您正在使用 Chrome 并且您没有设置 --unlimited-quota-for-files 标志
回答by Michael
This filesystem API does not appear to actually write a true "file" to your hard disk.
It seems to store a file within a sandboxed safe zone in the browser.
You'll have to write a quick and dirty little file manager (or find one out there) to manage the files for a given web app. You can also try visiting filesystem://<your URL here>/temporary/to see all the files that your app has created.
此文件系统 API 似乎并未实际将真正的“文件”写入您的硬盘。它似乎将文件存储在浏览器的沙盒安全区中。您必须编写一个快速而肮脏的小文件管理器（或在那里找到一个）来管理给定 Web 应用程序的文件。您还可以尝试访问filesystem://<your URL here>/temporary/以查看您的应用程序创建的所有文件。
回答by Marcel
What about just using localStorage?
只使用localStorage怎么样？
