求Base64转换代码 如题 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 <html> <head> <title>base64 Encoding/Decoding</title> </head> <script type="text/javascript"><!-- var keyStr = "ABCDEFGHIJKLMNOP" + "QRSTUVWXYZabcdef" + "ghijklmnopqrstuv" + "wxyz0123456789+/" + "="; function encode64(input) { input = escape(input); var output = ""; var chr1, chr2, chr3 = ""; var enc1, enc2, enc3, enc4 = ""; var i = 0; do { chr1 = input.charCodeAt(i++); chr2 = input.charCodeAt(i++); chr3 = input.charCodeAt(i++); enc1 = chr1 >> 2; enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); enc4 = chr3 & 63; if (isNaN(chr2)) { enc3 = enc4 = 64; } else if (isNaN(chr3)) { enc4 = 64; } output = output + keyStr.charAt(enc1) + keyStr.charAt(enc2) + keyStr.charAt(enc3) + keyStr.charAt(enc4); chr1 = chr2 = chr3 = ""; enc1 = enc2 = enc3 = enc4 = ""; } while (i < input.length); return output; } function decode64(input) { var output = ""; var chr1, chr2, chr3 = ""; var enc1, enc2, enc3, enc4 = ""; var i = 0; // remove all characters that are not A-Z, a-z, 0-9, +, /, or = var base64test = /[^A-Za-z0-9\+\/\=]/g; if (base64test.exec(input)) { alert("There were invalid base64 characters in the input text.\n" + "Valid base64 characters are A-Z, a-z, 0-9, '+', '/', and '='\n" + "Expect errors in decoding."); } input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); do { enc1 = keyStr.indexOf(input.charAt(i++)); enc2 = keyStr.indexOf(input.charAt(i++)); enc3 = keyStr.indexOf(input.charAt(i++)); enc4 = keyStr.indexOf(input.charAt(i++)); chr1 = (enc1 << 2) | (enc2 >> 4); chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); chr3 = ((enc3 & 3) << 6) | enc4; output = output + String.fromCharCode(chr1); if (enc3 != 64) { output = output + String.fromCharCode(chr2); } if (enc4 != 64) { output = output + String.fromCharCode(chr3); } chr1 = chr2 = chr3 = ""; enc1 = enc2 = enc3 = enc4 = ""; } while (i < input.length); return unescape(output); } //--></script> <body> <form name="base64Form"> Type in the message you want to encode in base64, or paste<br> base64 encoded text into the text field, select Encode or Decode, <br> and click the button!<br> <textarea name="theText" cols="40" rows="6"></textarea><br> <input type="button" name="encode" value="Encode to base64" onClick="document.base64Form.theText.value=encode64(document.base64Form.theText.value);"> <input type="button" name="decode" value="Decode from base64" onClick="document.base64Form.theText.value=decode64(document.base64Form.theText.value);"> </form> </body></html> 如何从框架页内退出来,回到主页 求教关于模拟登录的问题 大家好,问一个关于onclientclick的问题 JS实现的3级dropdownlist,可以联动,但无法获取所选的值。 为什么web服务器控件中置入 中文 就乱了 在线等!!!!!解决就结帖!!!!! 一个数据库查找问题~~~ 字数不太多,逻辑也很简单,菜鸟小弟在此请教各位高人,localhost相关问题,麻烦大家看看拉,搞定马上结帖! 求问 .NET 大数据解决方案或思路 主要是太高兴!!!! 怎么在ASP.NET中动态包含文件 QQ能不能在Linux系统中使用?
<head>
<title>base64 Encoding/Decoding</title>
</head> <script type="text/javascript"><!-- var keyStr = "ABCDEFGHIJKLMNOP" +
"QRSTUVWXYZabcdef" +
"ghijklmnopqrstuv" +
"wxyz0123456789+/" +
"="; function encode64(input) {
input = escape(input);
var output = "";
var chr1, chr2, chr3 = "";
var enc1, enc2, enc3, enc4 = "";
var i = 0; do {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++); enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63; if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
} output = output +
keyStr.charAt(enc1) +
keyStr.charAt(enc2) +
keyStr.charAt(enc3) +
keyStr.charAt(enc4);
chr1 = chr2 = chr3 = "";
enc1 = enc2 = enc3 = enc4 = "";
} while (i < input.length); return output;
} function decode64(input) {
var output = "";
var chr1, chr2, chr3 = "";
var enc1, enc2, enc3, enc4 = "";
var i = 0; // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
var base64test = /[^A-Za-z0-9\+\/\=]/g;
if (base64test.exec(input)) {
alert("There were invalid base64 characters in the input text.\n" +
"Valid base64 characters are A-Z, a-z, 0-9, '+', '/', and '='\n" +
"Expect errors in decoding.");
}
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); do {
enc1 = keyStr.indexOf(input.charAt(i++));
enc2 = keyStr.indexOf(input.charAt(i++));
enc3 = keyStr.indexOf(input.charAt(i++));
enc4 = keyStr.indexOf(input.charAt(i++)); chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4; output = output + String.fromCharCode(chr1); if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
} chr1 = chr2 = chr3 = "";
enc1 = enc2 = enc3 = enc4 = ""; } while (i < input.length); return unescape(output);
} //--></script> <body> <form name="base64Form"> Type in the message you want to encode in base64, or paste<br>
base64 encoded text into the text field, select Encode or Decode, <br>
and click the button!<br> <textarea name="theText" cols="40" rows="6"></textarea><br> <input type="button" name="encode" value="Encode to base64"
onClick="document.base64Form.theText.value=encode64(document.base64Form.theText.value);">
<input type="button" name="decode" value="Decode from base64"
onClick="document.base64Form.theText.value=decode64(document.base64Form.theText.value);"> </form> </body>
</html>