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data/post/zip/zip.js
87 строк
2 KB
Brent Cook
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07 янв 2017, 21:50
07 янв 2017, 21:50
31f85b9
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/* * Original technique from http://naterice.com/zip-and-unzip-files-using-the-windows-shell-and-vbscript/ */ function create_zip(dst) { var header = "\x50\x4b\x05\x06" + "\x00\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00\x00"; /* * Trick to write a binary file regardless of the system locale */ var outw = new ActiveXObject("ADODB.Stream"); outw.Type = 2; outw.Open(); outw.WriteText(header); outw.Position = 0; var outa = new ActiveXObject("ADODB.Stream"); outa.Type = 2; outa.Charset = "windows-1252"; outa.Open() outw.CopyTo(outa); outa.SaveToFile(dst, 2); outw.Close(); outa.Close(); } function basename(path) { var a = path.split("\\"); var b = a.slice(-1); return b[0]; } function fileeq(a, b) { return basename(a).toLowerCase() == basename(b).toLowerCase(); } function zip(src, dst) { var shell = new ActiveXObject('Shell.Application'); var fso = new ActiveXObject('Scripting.FileSystemObject'); /* * Normalize paths, required by the shell commands */ src = fso.GetAbsolutePathName(src); dst = fso.GetAbsolutePathName(dst); /* * Create an empty zip file if necessary */ if (!fso.FileExists(dst)) { create_zip(dst); } /* * Check for duplicates */ var zipfile = shell.Namespace(dst); var files = zipfile.items(); var count = files.Count; for (var i = 0; i < files.Count; i++) { if (fileeq(files.Item(i).Name, src)) { return; } } zipfile.CopyHere(src); /* * Wait for completion, but data can be stale on network shares, so we * abort after 5 seconds. */ var max_tries = 50; while (count == zipfile.items().Count) { WScript.Sleep(100); if (max_tries-- == 0) { return; } } }