function encodeURL(str){
var s0, i, s, u;
s0 = ""; // encoded str
for (i = 0; i < str.length; i++){ // scan the source
s = str.charAt(i);
u = str.charCodeAt(i); // get unicode of the char
if (s == " "){s0 += "+";} // SP should be converted to "+"
else {
if ( u == 0x2a || u == 0x2d || u == 0x2e || u == 0x5f || ((u >= 0x30) && (u <= 0x39)) || ((u >= 0x41) && (u <= 0x5a)) || ((u >= 0x61) && (u <= 0x7a))){ // check for escape
s0 = s0 + s; // don't escape
}
else { // escape
if ((u >= 0x0) && (u <= 0x7f)){ // single byte format
s = "0"+u.toString(16);
s0 += "%"+ s.substr(s.length-2);
}
else if (u > 0x1fffff){ // quaternary byte format (extended)
s0 += "%" + (oxf0 + ((u & 0x1c0000) >> 18)).toString(16);
s0 += "%" + (0x80 + ((u & 0x3f000) >> 12)).toString(16);
s0 += "%" + (0x80 + ((u & 0xfc0) >> 6)).toString(16);
s0 += "%" + (0x80 + (u & 0x3f)).toString(16);
}
else if (u > 0x7ff){ // triple byte format
s0 += "%" + (0xe0 + ((u & 0xf000) >> 12)).toString(16);
s0 += "%" + (0x80 + ((u & 0xfc0) >> 6)).toString(16);
s0 += "%" + (0x80 + (u & 0x3f)).toString(16);
}
else { // double byte format
s0 += "%" + (0xc0 + ((u & 0x7c0) >> 6)).toString(16);
s0 += "%" + (0x80 + (u & 0x3f)).toString(16);
}
}
}
}
return s0;
}
혹은
encodeURIComponent(var str)을 사용
//decoder
/* Function Equivalent to java.net.URLDecoder.decode(String, "UTF-8")
Copyright (C) 2002, Cresc Corp.
Version: 1.0
*/
function decodeURL(str){
var s0, i, j, s, ss, u, n, f;
s0 = ""; // decoded str
for (i = 0; i < str.length; i++){ // scan the source str
s = str.charAt(i);
if (s == "+"){s0 += " ";} // "+" should be changed to SP
else {
if (s != "%"){s0 += s;} // add an unescaped char
else{ // escape sequence decoding
u = 0; // unicode of the character
f = 1; // escape flag, zero means end of this sequence
while (true) {
ss = ""; // local str to parse as int
for (j = 0; j < 2; j++ ) { // get two maximum hex characters for parse
sss = str.charAt(++i);
if (((sss >= "0") && (sss <= "9")) || ((sss >= "a") && (sss <= "f")) || ((sss >= "A") && (sss <= "F"))) {
ss += sss; // if hex, add the hex character
} else {--i; break;} // not a hex char., exit the loop
}
n = parseInt(ss, 16); // parse the hex str as byte
if (n <= 0x7f){u = n; f = 1;} // single byte format
if ((n >= 0xc0) && (n <= 0xdf)){u = n & 0x1f; f = 2;} // double byte format
if ((n >= 0xe0) && (n <= 0xef)){u = n & 0x0f; f = 3;} // triple byte format
if ((n >= 0xf0) && (n <= 0xf7)){u = n & 0x07; f = 4;} // quaternary byte format (extended)
if ((n >= 0x80) && (n <= 0xbf)){u = (u << 6) + (n & 0x3f); --f;} // not a first, shift and add 6 lower bits
if (f <= 1){break;} // end of the utf byte sequence
if (str.charAt(i + 1) == "%"){ i++ ;} // test for the next shift byte
else {break;} // abnormal, format error
}
s0 += String.fromCharCode(u); // add the escaped character
}
}
}
return s0;