Mon May 8 03:02:00 UTC 2023 inscode

index.js

-console.log("欢迎来到 InsCode");
+console.log("欢迎来到 InsCode");
\ No newline at end of file
+enc = ["o", "ο", "о", "ᴏ"]
+console.log(encodeURI('o-ο-о-ᴏ'))
+var dec = {
+    'o': 0,
+    'ο': 1,
+    'о': 2,
+    'ᴏ': 3
+};
+var url = "https://www.baidu.com"
+// 获取utf8数组
+// let unversioned = toUTF8Array(url)
+//     // 转换为base 4字符串
+//     // padstart非常重要！否则会丢失前导0
+//     .map(n => n.toString(4).padStart(4, "0"))
+//     // 转换为字符数组
+//     .join("").split("")
+//     // 映射到o的不同形式
+//     .map(x => enc[parseInt(x)])
+//     // 连接成单个字符串
+//     .join("")
+let unversioned = toUTF8Array(url)
+// 转换为base 4字符串
+let b4str = unversioned.map(n => n.toString(4).padStart(4, "0"))
+console.log("转换为base 4字符串：\n", b4str)
+// 转换为字符数组
+let str = b4str.join("").split("")
+console.log("转换为字符数组：\n", str)
+// 映射到o的不同形式
+let ooo = str.map(x => enc[parseInt(x)]).join("")
+console.log("映射到o的不同形式：\n", ooo)
+
+function getUrl(str) {
+    // 获取url的base 4字符串表示
+    let b4str = str.split("").map(x => dec[x]).join("")
+    let utf8arr = []
+    // 每次解析4个字符
+    // 记住添加前导0的填充
+    for (let i = 0; i < b4str.length; i += 4)
+        utf8arr.push(parseInt(b4str.substring(i, i + 4), 4))
+    // 返回解码后的字符串
+    return Utf8ArrayToStr(utf8arr)
+}
+function toUTF8Array(str) {
+    var utf8 = [];
+    for (var i = 0; i < str.length; i++) {
+        var charcode = str.charCodeAt(i);
+        if (charcode < 0x80) utf8.push(charcode);
+        else if (charcode < 0x800) {
+            utf8.push(0xc0 | (charcode >> 6),
+                0x80 | (charcode & 0x3f));
+        }
+        else if (charcode < 0xd800 || charcode >= 0xe000) {
+            utf8.push(0xe0 | (charcode >> 12),
+                0x80 | ((charcode >> 6) & 0x3f),
+                0x80 | (charcode & 0x3f));
+        }
+        else {
+            i++;
+            charcode = ((charcode & 0x3ff) << 10) | (str.charCodeAt(i) & 0x3ff)
+            utf8.push(0xf0 | (charcode >> 18),
+                0x80 | ((charcode >> 12) & 0x3f),
+                0x80 | ((charcode >> 6) & 0x3f),
+                0x80 | (charcode & 0x3f));
+        }
+    }
+    console.log(utf8, 'utf8');
+    return utf8;
+}
+function Utf8ArrayToStr(array) {
+    var out, i, len, c;
+    var char2, char3;
+
+    out = "";
+    len = array.length;
+    i = 0;
+    while (i < len) {
+        c = array[i++];
+        switch (c >> 4) {
+            case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
+                // 0xxxxxxx
+                out += String.fromCharCode(c);
+                break;
+            case 12: case 13:
+                // 110x xxxx   10xx xxxx
+                char2 = array[i++];
+                out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
+                break;
+            case 14:
+                // 1110 xxxx  10xx xxxx  10xx xxxx
+                char2 = array[i++];
+                char3 = array[i++];
+                out += String.fromCharCode(((c & 0x0F) << 12) |
+                    ((char2 & 0x3F) << 6) |
+                    ((char3 & 0x3F) << 0));
+                break;
+        }
+    }
+
+    return out;
+}
\ No newline at end of file