chromiumのdevツールからget_file.jsをコピペ
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// Copyright (c) 2009 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. function Download(url, path, verbose) { if (verbose) { WScript.StdOut.Write(" * GET " + url + "..."); } try { xml_http = new ActiveXObject("MSXML2.ServerXMLHTTP"); } catch (e) { WScript.StdOut.WriteLine("[-] XMLHTTP " + new Number(e.number).toHex() + ": Cannot create Active-X object (" + e.description) + ")."; WScript.Quit(1); } try { xml_http.open("GET", url, false); } catch (e) { WScript.StdOut.WriteLine("[-] XMLHTTP " + new Number(e.number).toHex() + ": invalid URL."); WScript.Quit(1); } var response_body = null; var size_description = "?"; var file_size; try { xml_http.send(null); if (xml_http.status != 200) { WScript.StdOut.WriteLine("[-] HTTP " + xml_http.status + " " + xml_http.statusText); WScript.Quit(1); } response_body = xml_http.responseBody; size_description = xml_http.getResponseHeader("Content-Length"); if (size_description != "") { file_size = parseInt(size_description) size_description = file_size.toBytes(); } else { try { file_size = new Number(xml_http.responseText.length) size_description = file_size.toBytes(); } catch(e) { size_description = "unknown size"; } } } catch (e) { WScript.StdOut.WriteLine("[-] XMLHTTP " + new Number(e.number).toHex() + ": Cannot make HTTP request (" + e.description) + ")"; WScript.Quit(1); } if (verbose) { WScript.StdOut.WriteLine("ok (" + size_description + ")."); WScript.StdOut.Write(" * Save " + path + "..."); } try { var adodb_stream = new ActiveXObject("ADODB.Stream"); adodb_stream.Mode = 3; // ReadWrite adodb_stream.Type = 1; // 1= Binary adodb_stream.Open(); // Open the stream adodb_stream.Write(response_body); // Write the data adodb_stream.SaveToFile(path, 2); // Save to our destination adodb_stream.Close(); } catch(e) { WScript.StdOut.WriteLine( "[-] ADODB.Stream " + new Number(e.number).toHex() + ": Cannot save file to " + path + ": " + e.description); WScript.Quit(1); } if (typeof(file_size) != undefined) { var file_system_object = WScript.CreateObject("Scripting.FileSystemObject") var file = file_system_object.GetFile(path) if (file.Size < file_size) { WScript.StdOut.WriteLine("[-] File only partially downloaded."); WScript.Quit(1); } } if (verbose) { WScript.StdOut.WriteLine("ok."); } } // Utilities Number.prototype.isInt = function NumberIsInt() { return this % 1 == 0; }; Number.prototype.toBytes = function NumberToBytes() { // Returns a "pretty" string representation of a number of bytes: var units = ["KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"]; var unit = "bytes"; var limit = 1; while(this > limit * 1100 && units.length > 0) { limit *= 1024; unit = units.shift(); } return (Math.round(this * 100 / limit) / 100).toString() + " " + unit; }; Number.prototype.toHex = function NumberToHex(length) { if (arguments.length == 0) length = 1; if (typeof(length) != "number" && !(length instanceof Number)) { throw Exception("Length must be a positive integer larger than 0.", TypeError, 0); } if (length < 1 || !length.isInt()) { throw Exception("Length must be a positive integer larger than 0.", "RangeError", 0); } var result = (this + (this < 0 ? 0x100000000 : 0)).toString(16); while (result.length < length) result = "0" + result; return result; }; if (WScript.Arguments.length != 2) { WScript.StdOut.Write("Incorrect arguments to get_file.js") } else { Download(WScript.Arguments(0), WScript.Arguments(1), false); } |
接続にServerXMLHTTP、ファイル操作にADODBを使ってかなり強引と思われる。これは同期で動くと思うので、いったんメモリにダウンロードデータを蓄えるため大きいファイルはきびしいとおもわれる。
ＭＳのサンプルをコピペ
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function getText(strURL) { var strResult; try { // Create the WinHTTPRequest ActiveX Object. var WinHttpReq = new ActiveXObject( "WinHttp.WinHttpRequest.5.1"); // Create an HTTP request. var temp = WinHttpReq.Open("GET", strURL, false); // Send the HTTP request. WinHttpReq.Send(); // Retrieve the response text. strResult = WinHttpReq.ResponseText; } catch (objError) { strResult = objError + "\n" strResult += "WinHTTP returned error: " + (objError.number & 0xFFFF).toString() + "\n\n"; strResult += objError.description; } // Return the response text. return strResult; } WScript.Echo(getText("http://www.microsoft.com/default.htm")); |
これはWinHttpをつかっている、これも同期なのでさっきと同じ問題がある。調べてみるとこのオブジェクトには非同期機能とコールバック機能やストリーム機能もあるようだ。
よくよく調べてみるとwshでバイナリを扱うのは大変なようだ。面倒なのでスルー。
