2024-10-10

web/include/base64.js

@@ -0,0 +1,116 @@
+var keyStr = "3WiPZ+xr/yKf5OdQ6UATHYItebL8B0njk192cJRNagGm7hoECvFVpqw4DsMlzuXS=";
+//将Ansi编码的字符串进行Base64编码
+function encode64(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;
+}
+//将Base64编码字符串转换成Ansi编码的字符串
+function decode64(input) {
+var output = "";
+var chr1, chr2, chr3 = "";
+var enc1, enc2, enc3, enc4 = "";
+var i = 0;
+if (input.length % 4 != 0) {
+return "";
+}
+var base64test = /[^A-Za-z0-9\+\/\=]/g;
+if (base64test.exec(input)) {
+return "";
+}
+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 += String.fromCharCode(chr2);
+}
+if (enc4 != 64) {
+output += String.fromCharCode(chr3);
+}
+chr1 = chr2 = chr3 = "";
+enc1 = enc2 = enc3 = enc4 = "";
+} while (i < input.length);
+return output;
+}
+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;
+}
+// 
+//var de = encode64(utf16to8("source"));
+//document.writeln(de+"<br>");
+//var ee = utf8to16(decode64(de))
+//document.writeln(ee);
+//
+//-->