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<title>JS編碼 - CoolApp工具</title>
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<script language="jscript"><!--
var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var base64DecodeChars = new Array(-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-
1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63,52,53,54,55,56,57,58,59,60,61,-1,-1,-
1,-1,-1,-1,-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,-1,-1,-
1,-1,-1,-1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1);
function base64encode(str) {
var out,i,len;
var c1,c2,c3;
len = str.length;
i = 0;
out = "";
while(i < len) {
c1 = str.charCodeAt(i++) & 0xff;
if(i == len)
{
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt((c1 & 0x3) << 4);
out += "==";
break;
}
c2 = str.charCodeAt(i++);
if(i == len)
{
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt((c2 & 0xF) << 2);
out += "=";
break;
}
c3 = str.charCodeAt(i++);
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
out += base64EncodeChars.charAt(c3 & 0x3F);
}
return out;
}
function base64decode(str) {
var c1,c2,c3,c4;
var i,len,out;
len = str.length;
i = 0;
out = "";
while(i < len) {
/* c1 */
do {
c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
} while(i < len && c1 == -1);
if(c1 == -1)
break;
/* c2 */
do {
c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
} while(i < len && c2 == -1);
if(c2 == -1)
break;
out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
/* c3 */
do {
c3 = str.charCodeAt(i++) & 0xff;
if(c3 == 61)
return out;
c3 = base64DecodeChars[c3];
} while(i < len && c3 == -1);
if(c3 == -1)
break;
out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
/* c4 */
do {
c4 = str.charCodeAt(i++) & 0xff;
if(c4 == 61)
return out;
c4 = base64DecodeChars[c4];
} while(i < len && c4 == -1);
if(c4 == -1)
break;
out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
}
return out;
}
function utf16to8(str) {
var out,i,len,c;
out = "";
len = str.length;
for(i = 0; i < len; i++) {
c = str.charCodeAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) {
out += str.charAt(i);
} else if (c > 0x07FF) {
out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
} else {
out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
}
}
return out;
}
function utf8to16(str) {
var out,i,len,c;
var char2,char3;
out = "";
len = str.length;
i = 0;
while(i < len) {
c = str.charCodeAt(i++);
switch(c >> 4)
{
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
// 0xxxxxxx
out += str.charAt(i-1);
break;
case 12: case 13:
// 110x xxxx 10xx xxxx
char2 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
break;
case 14:
// 1110 xxxx 10xx xxxx 10xx xxxx
char2 = str.charCodeAt(i++);
char3 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x0F) << 12) |
((char2 & 0x3F) << 6) |
((char3 & 0x3F) << 0));
break;
}
}
return out;
}
/////////////////////////////
function Escape(){
if (frm.RLT.value=='')
frm.RLT.value=escape(frm.URI.value)
else{
if (frm.reEnc.checked){
frm.RLT.value=escape(frm.RLT.value)
}else{
frm.RLT.value=escape(frm.URI.value)
}
}
}
function UnEscape(){
try{
frm.RLT.value=unescape(frm.RLT.value)
}catch(e){
alert((e.number).toString() +"\n\n"+e.description);
}
}
function EncodeURI(){
if (frm.RLT.value=='')
frm.RLT.value=encodeURI(frm.URI.value)
else{
if (frm.reEnc.checked){
frm.RLT.value=encodeURI(frm.RLT.value)
}else{
frm.RLT.value=encodeURI(frm.URI.value)
}
}
}
function DecodeURI(){
try{
frm.RLT.value=decodeURI(frm.RLT.value)
}catch(e){
alert((e.number).toString() +"\n\n"+e.description);
}
}
function EnBase64(){
if (frm.RLT.value=='')
frm.RLT.value=base64encode(utf16to8(frm.URI.value))
else{
if (frm.reEnc.checked){
frm.RLT.value=base64encode(utf16to8(frm.RLT.value))
}else{
frm.RLT.value=base64encode(utf16to8(frm.URI.value))
}
}
}
function DeBase64(){
try{
frm.RLT.value=utf8to16(base64decode(frm.RLT.value))
}catch(e){
alert((e.number).toString() +"\n\n"+e.description);
}
}
//--></script>
</head>
<body style="text-align:center;" onselectstart="with(event.srcElement) return(/INPUT|TEXTAREA/.test
(tagName))">
<strong>JavaScript 編碼/解碼 1.0V<br />
</strong><a href="mailto:[email protected]">design by coolapp</a>
<br />
<br /><form name="frm" method="post" action="" onSubmit="return false">
<table width="700" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#dddddd">
<tr>
<td>源</td>
<td> <textarea name="URI" cols="99" rows="6" id="URI">test - 測試!</textarea></td>
</tr>
<tr>
<td>結果</td>
<td><textarea name="RLT" cols="99" rows="10" id="RLT" readonly></textarea></td>
</tr>
<tr>
<td>選項</td>
<td><input name="reEnc" type="checkbox" id="reEnc" value="1" /><label for="reEnc" style="cursor:hand;">從
結果再編碼</label></td>
</tr>
<tr>
<td>方法</td>
<td align="center"><p>
<input name="Submit" type="button" class="button" value="編碼" onClick="EncodeURI()" />
<input name="Submit2" type="button" class="button" value="解碼" onClick="DecodeURI()" />
(新)
<input name="Submit3" type="button" class="button" value="編碼" onClick="Escape()" />
<input name="Submit22" type="button" class="button" value="解碼" onClick="UnEscape()" />
(舊:不能用於URI)
<input name="Submit32" type="button" class="button" value="編碼" onClick="EnBase64()" />
<input name="Submit222" type="button" class="button" value="解碼" onClick="DeBase64()" />
(Base64)</p> </td>
</tr>
</table>
<div style="width:700px; height:120px; overflow-y:scroll; padding:5 5 5 5; background-color:#dddddd;">
<table width="100%" border="0" cellpadding="2" cellspacing="1" bgcolor="#e0e0e0">
<tr>
<td bgcolor="#EEEEEE"><strong>encodeURI</strong></td>
<td bgcolor="#EEEEEE"><p class="STYLE1"><strong>encodeURI </strong>方法返回一個編碼的 URI。如果您將編碼結
果傳遞給 <strong>decodeURI</strong>，那麼將返回初始的字符串。<strong>encodeURI </strong>方法不會對下列字符進
行編碼：":"、"/"、";" 和 "?"。請使用 <strong>encodeURIComponent</strong> 方法對這些字符進行編碼。</p></td>
</tr>
<tr>
<td bgcolor="#EEEEEE"><strong>decodeURI</strong></td>
<td bgcolor="#EEEEEE"><span class="STYLE1">使用 <strong>decodeURI </strong>方法代替已經過時的
<strong>unescape</strong> 方法。<br />
<strong>decodeURI </strong>方法返回一個字符串值。<br />
如果 <em>URIString</em> 無效，那麼將產生一個 URIError。</span></td>
</tr>
<tr>
<td bgcolor="#EEEEEE"><strong>escape</strong></td>
<td bgcolor="#EEEEEE"><span class="STYLE1"><strong>escape</strong> 方法返回一個包含了 <em>charstring</em>
內容的字符串值（ Unicode 格式）。所有空格、標點、重音符號以及其他非 ASCII 字符都用 <strong>%
</strong><em>xx</em> 編碼代替，其中 <em>xx</em> 等於表示該字符的十六進制數。例如，空格返回的是 "%20"
。<br />
字符值大於 255 的以 <strong>%u</strong><em>xxxx</em> 格式存儲。 <br />
<strong>注意escape</strong> 方法不能夠用來對統一資源標示碼 (URI) 進行編碼。對其編碼應使用
<strong>encodeURI</strong> 和<strong>encodeURIComponent</strong> 方法。</span></td>
</tr>
<tr>
<td bgcolor="#EEEEEE"><strong>unescape</strong> </td>
<td bgcolor="#EEEEEE"><p class="STYLE1"><strong>unescape</strong> 方法返回一個包含 <em>charstring</em> 內
容的字符串值。所有以 %<em>xx</em> 十六進制形式編碼的字符都用 ASCII 字符集中等價的字符代替。<br />
以 <strong>%u</strong><em>xxxx</em> 格式（Unicode 字符）編碼的字符用十六進制編碼 <em>xxxx</em> 的
Unicode 字符代替。 <br />
<strong>注意unescape</strong> 方法不能用於解碼統一資源標識碼 (URI)。解該碼可使用
<strong>decodeURI</strong> 和 <strong>decodeURIComponent</strong> 方法。</p></td>
</tr>
</table></div>
</form></span>
</body>
</html>
javascript編碼解碼
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