我想让我网站上的用户能够下载" lnk"文件。 我的想法是生成这个文件,包含一个只能使用一次的地址。 有没有办法在javascript中生成此文件? 流程类似于 -
这样的东西在客户端的javascript中是可行的吗?或者我需要使用java服务器端生成此文件吗?
答案 0 :(得分:5)
这是mslink.sh的忠实翻译。
我只在Windows 8.1中测试了我的答案,但我认为它也适用于旧版本的Windows。
function create_lnk_blob(lnk_target) {
function hex_to_arr(s) {
var result = Array(s.length / 2);
for (var i = 0; i < result.length; ++i) {
result[i] = +('0x' + s.substr(2*i, 2));
}
return result;
}
function str_to_arr(s) {
var result = Array(s.length);
for (var i = 0; i < s.length; ++i) {
var c = s.charCodeAt(i);
if (c >= 128) {
throw Error("Only ASCII paths are suppored :-(");
}
result[i] = c;
}
return result;
}
function convert_CLSID_to_DATA(s) {
var idx = [[6,2], [4,2], [2,2], [0,2],
[11,2], [9,2], [16,2], [14,2],
[19,4], [24,12]];
var s = idx.map(function (ii) {
return s.substr(ii[0], ii[1]);
});
return hex_to_arr(s.join(''));
}
function gen_IDLIST(s) {
var item_size = (0x10000 + s.length + 2).toString(16).substr(1);
return hex_to_arr(item_size.replace(/(..)(..)/, '$2$1')).concat(s);
}
var HeaderSize = [0x4c, 0x00,0x00,0x00],
LinkCLSID = convert_CLSID_to_DATA("00021401-0000-0000-c000-000000000046"),
LinkFlags = [0x01,0x01,0x00,0x00], // HasLinkTargetIDList ForceNoLinkInfo
FileAttributes_Directory = [0x10,0x00,0x00,0x00],
FileAttributes_File = [0x20,0x00,0x00,0x00],
CreationTime = [0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],
AccessTime = [0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],
WriteTime = [0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],
FileSize = [0x00,0x00,0x00,0x00],
IconIndex = [0x00,0x00,0x00,0x00],
ShowCommand = [0x01,0x00,0x00,0x00], //SW_SHOWNORMAL
Hotkey = [0x00,0x00], // No Hotkey
Reserved = [0x00,0x00],
Reserved2 = [0x00,0x00,0x00,0x00],
Reserved3 = [0x00,0x00,0x00,0x00],
TerminalID = [0x00,0x00],
CLSID_Computer = convert_CLSID_to_DATA("20d04fe0-3aea-1069-a2d8-08002b30309d"),
CLSID_Network = convert_CLSID_to_DATA("208d2c60-3aea-1069-a2d7-08002b30309d"),
PREFIX_LOCAL_ROOT = [0x2f],
PREFIX_FOLDER = [0x31,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],
PREFIX_FILE = [0x32,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],
PREFIX_NETWORK_ROOT = [0xc3,0x01,0x81],
PREFIX_NETWORK_PRINTER = [0xc3,0x02,0xc1],
END_OF_STRING = [0x00];
if (/.*\\+$/.test(lnk_target)) {
lnk_target = lnk_target.replace(/\\+$/g, '');
var target_is_folder = true;
}
var prefix_root, item_data, target_root, target_leaf;
if (lnk_target.substr(0, 2) === '\\\\') {
prefix_root = PREFIX_NETWORK_ROOT;
item_data = [0x1f, 0x58].concat(CLSID_Network);
target_root = lnk_target.subtr(lnk_target.lastIndexOf('\\'));
if (/\\\\.*\\.*/.test(lnk_target)) {
target_leaf = lnk_target.substr(lnk_target.lastIndexOf('\\') + 1);
}
if (target_root === '\\') {
target_root = lnk_target;
}
} else {
prefix_root = PREFIX_LOCAL_ROOT;
item_data = [0x1f, 0x50].concat(CLSID_Computer);
target_root = lnk_target.replace(/\\.*$/, '\\');
if (/.*\\.*/.test(lnk_target)) {
target_leaf = lnk_target.replace(/^.*?\\/, '');
}
}
var prefix_of_target, file_attributes;
if (!target_is_folder) {
prefix_of_target = PREFIX_FILE;
file_attributes = FileAttributes_File;
} else {
prefix_of_target = PREFIX_FOLDER;
file_attributes = FileAttributes_Directory;
}
target_root = str_to_arr(target_root);
for (var i = 1; i <= 21; ++i) {
target_root.push(0);
}
var id_list_items = gen_IDLIST(item_data);
id_list_items = id_list_items.concat(
gen_IDLIST(prefix_root.concat(target_root, END_OF_STRING)));
if (target_leaf) {
target_leaf = str_to_arr(target_leaf);
id_list_items = id_list_items.concat(
gen_IDLIST(prefix_of_target.concat(target_leaf, END_OF_STRING)));
}
var id_list = gen_IDLIST(id_list_items);
var data = [].concat(HeaderSize,
LinkCLSID,
LinkFlags,
file_attributes,
CreationTime,
AccessTime,
WriteTime,
FileSize,
IconIndex,
ShowCommand,
Hotkey,
Reserved,
Reserved2,
Reserved3,
id_list,
TerminalID);
return new Blob([new Uint8Array(data)], { type: 'application/x-ms-shortcut' });
}
var blob = create_lnk_blob('C:\\Windows\\System32\\Calc.exe');
使用它像:
var blob_to_file = create_lnk_blob('C:\\Windows\\System32\\Calc.exe');
var blob_to_folder = create_lnk_blob('C:\\Users\\Myself\\Desktop\\'); // with a trailing slash
答案 1 :(得分:-1)
如果您的网站允许使用php,这将很简单。
如果您的脚本是html文件的一部分,只需编写javascript,就好像您正在编写它以发送静态lnk文件一样。然后,在lnk地址部分,将javascript分成两部分,分成html。然后在那时,输入
<?php /*PHP code set a variable *? /* PHP code to generate proper string*/ PRINT /*PHP variable*/
?>
答案 2 :(得分:-3)
我认为让它成为纯粹的客户是不可能的。 即使是web rtc协议也需要至少一个iceServer来通知其他客户端。
我认为最简单的方法是使用http://peerjs.com/
您可以先创建房间所有者的clinet令牌
//room owner side
peer.on('open', function(my_peer_id) {
console.log('My peer ID is: ' + my_peer_id);
});
并将令牌发送给您想要的任何其他人(通过文本文件,网络聊天等)
然后其他连接使用上面的标记
//the other one
var conn = peer.connect(other_peer_id);
房间所有者发现有人进入房间后。
与信号服务器断开连接,因此令牌将无法使用
//room owner side
peer.disconnect()
关于客户端生成和读取文件,我建议您阅读以下文章。
我相信fileReader api和blob的兼容性并不重要。 因为永远不会有支持webrtc但不支持fileReader api的浏览器