又是一个Base64的问题 js写base64解码是浪费精神,况且对于中文来说,有一个跨不过的坎,就是编码问题,通常浏览器的js无法做gb2312<=>unicode(js中所有的字符串都是unicode)或者其他涉及编码的转换,你所说的mozilla乱码可能就源于这个原因(通常你解码得到的多为gb2312编码,而js无法辨认,也没有办法转换到unicode)。建议你用服务器端脚本做。通常服务器端脚本或者后端语言都有完整的编码处理能力。 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 我现在是想从服务器发一个用PHP进行过Base64编码的文件到用户那里,然后由用户的客户端程序解码。因为要兼容多浏览器,不能用ActiveX或VBScript。如果可以用JAVA的话,也请帮帮忙,提供一些意见。 不明白你为什么要发送base64编码文件到客户端。js进行base64编码毫无必要且也基本不可能。 标题 base64编码/解码 wanghr100 [收藏] 关键字 base64 编码 解码 出处 编者:解决了对中文的不支持问题.先用escape()对中文进行编码.然后再进行base64编码.解码时,再加入unescape()对中文进行解码.<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> 谢谢wanghr100(灰豆宝宝.net)不过仍有一个问题,如何在服务器端使用escape函数?php中好像没有吧? 服务器端可以利用JavaScript来当ASP的脚本.<% @Language="JavaScript" %>PHP不熟悉. 关于页面加载的同时执行js问题 请教高人这句话怎不能执行 【翻译】Styling an input type="file"美化文件上传控件 在线等-----鼠标移到表格上,显示层,代码没错,但只显示很短时间就不见了 页面提速 一种特殊的自动跳转方式 50 分求救!按钮向文本框传值,非常急,求救!!!! 请问调用DLL中的函数有什么特殊吗 javascript操作证书 急急…… <span>的定位问题,一行中有几个<span>时总是无法让其在同一水平线上,几天了还没解决,请帮忙! 100分求javascript教程(最好很详细和深入)(dama2003,借同学分来发的,马上给分)
关键字 base64 编码 解码
出处
编者:解决了对中文的不支持问题.
先用escape()对中文进行编码.然后再进行base64编码.
解码时,再加入unescape()对中文进行解码.<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>
不过仍有一个问题,如何在服务器端使用escape函数?php中好像没有吧?
<% @Language="JavaScript" %>PHP不熟悉.