base64

utils/weapp-jwt.js

@@ -0,0 +1,77 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+var b64re = /^(?:[A-Za-z\d+\/]{4})*?(?:[A-Za-z\d+\/]{2}(?:==)?|[A-Za-z\d+\/]{3}=?)?$/;
+exports.weBtoa = function (string) {
+    string = String(string);
+    var bitmap, a, b, c, result = "", i = 0, rest = string.length % 3;
+    for (; i < string.length;) {
+        if ((a = string.charCodeAt(i++)) > 255 ||
+            (b = string.charCodeAt(i++)) > 255 ||
+            (c = string.charCodeAt(i++)) > 255)
+            throw new TypeError("Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range.");
+        bitmap = (a << 16) | (b << 8) | c;
+        result += b64.charAt(bitmap >> 18 & 63) + b64.charAt(bitmap >> 12 & 63) +
+            b64.charAt(bitmap >> 6 & 63) + b64.charAt(bitmap & 63);
+    }
+    return rest ? result.slice(0, rest - 3) + "===".substring(rest) : result;
+};
+exports.weAtob = function (string) {
+    string = String(string).replace(/[\t\n\f\r ]+/g, "");
+    if (!b64re.test(string))
+        throw new TypeError("Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded.");
+    string += "==".slice(2 - (string.length & 3));
+    var bitmap, result = "", r1, r2, i = 0;
+    for (; i < string.length;) {
+        bitmap = b64.indexOf(string.charAt(i++)) << 18 | b64.indexOf(string.charAt(i++)) << 12 |
+            (r1 = b64.indexOf(string.charAt(i++))) << 6 | (r2 = b64.indexOf(string.charAt(i++)));
+        result += r1 === 64 ? String.fromCharCode(bitmap >> 16 & 255) :
+            r2 === 64 ? String.fromCharCode(bitmap >> 16 & 255, bitmap >> 8 & 255) :
+                String.fromCharCode(bitmap >> 16 & 255, bitmap >> 8 & 255, bitmap & 255);
+    }
+    return result;
+};
+function b64DecodeUnicode(str) {
+    return decodeURIComponent(exports.weAtob(str).replace(/(.)/g, function (p) {
+        var code = p.charCodeAt(0).toString(16).toUpperCase();
+        if (code.length < 2) {
+            code = "0" + code;
+        }
+        return "%" + code;
+    }));
+}
+function base64_url_decode(str) {
+    var output = str.replace(/-/g, "+").replace(/_/g, "/");
+    switch (output.length % 4) {
+        case 0:
+            break;
+        case 2:
+            output += "==";
+            break;
+        case 3:
+            output += "=";
+            break;
+        default:
+            throw "Illegal base64url string!";
+    }
+    try {
+        return b64DecodeUnicode(output);
+    }
+    catch (err) {
+        return exports.weAtob(output);
+    }
+}
+function weappJwtDecode(token, options) {
+    if (typeof token !== "string") {
+        throw ("Invalid token specified");
+    }
+    options = options || {};
+    var pos = options.header === true ? 0 : 1;
+    try {
+        return JSON.parse(base64_url_decode(token.split(".")[pos]));
+    }
+    catch (e) {
+        throw ("Invalid token specified: " + e.message);
+    }
+}
+exports.default = weappJwtDecode;