Buffer.from(JSON.stringify(jwtHeader)).toString('base64')
/**
* base64js Uint8Array 8位无符号整数,长度1个字节,
* base64js.byteLength(base64Str) base64字符串转为字节数组的长度
* base64js.toByteArray(base64Str) base64字符串转为字节数组
* base64js.fromByteArray(bytes) 字节数组转为base64字符串
*/
(function (r) {
if (typeof exports === "object" && typeof module !== "undefined") {
module.exports = r()
} else {
if (typeof define === "function" && define.amd) {
define([], r)
} else {
var e;
if (typeof window !== "undefined") {
e = window
} else {
if (typeof global !== "undefined") {
e = global
} else {
if (typeof self !== "undefined") {
e = self
} else {
e = this
}
}
}
e.base64js = r()
}
}
})(function () {
var r, e, t;
return function r(e, t, n) {
function o(i, a) {
if (!t[i]) {
if (!e[i]) {
var u = typeof require == "function" && require;
if (!a && u) {
return u(i, !0)
}
if (f) {
return f(i, !0)
}
var d = new Error("Cannot find module '" + i + "'");
throw d.code = "MODULE_NOT_FOUND", d
}
var c = t[i] = {
exports: {}
};
e[i][0].call(c.exports, function (r) {
var t = e[i][1][r];
return o(t ? t : r)
}, c, c.exports, r, e, t, n)
}
return t[i].exports
}
var f = typeof require == "function" && require;
for (var i = 0; i < n.length; i++) {
o(n[i])
}
return o
}({
"/": [function (r, e, t) {
t.byteLength = c;
t.toByteArray = v;
t.fromByteArray = s;
var n = [];
var o = [];
var f = typeof Uint8Array !== "undefined" ? Uint8Array : Array;
var i = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
for (var a = 0, u = i.length; a < u; ++a) {
n[a] = i[a];
o[i.charCodeAt(a)] = a
}
o["-".charCodeAt(0)] = 62;
o["_".charCodeAt(0)] = 63;
function d(r) {
var e = r.length;
if (e % 4 > 0) {
throw new Error("Invalid string. Length must be a multiple of 4")
}
return r[e - 2] === "=" ? 2 : r[e - 1] === "=" ? 1 : 0
}
function c(r) {
return r.length * 3 / 4 - d(r)
}
function v(r) {
var e, t, n, i, a;
var u = r.length;
i = d(r);
a = new f(u * 3 / 4 - i);
t = i > 0 ? u - 4 : u;
var c = 0;
for (e = 0; e < t; e += 4) {
n = o[r.charCodeAt(e)] << 18 | o[r.charCodeAt(e + 1)] << 12 | o[r.charCodeAt(e + 2)] << 6 | o[r.charCodeAt(e + 3)];
a[c++] = n >> 16 & 255;
a[c++] = n >> 8 & 255;
a[c++] = n & 255
}
if (i === 2) {
n = o[r.charCodeAt(e)] << 2 | o[r.charCodeAt(e + 1)] >> 4;
a[c++] = n & 255
} else {
if (i === 1) {
n = o[r.charCodeAt(e)] << 10 | o[r.charCodeAt(e + 1)] << 4 | o[r.charCodeAt(e + 2)] >> 2;
a[c++] = n >> 8 & 255;
a[c++] = n & 255
}
}
return a
}
function l(r) {
return n[r >> 18 & 63] + n[r >> 12 & 63] + n[r >> 6 & 63] + n[r & 63]
}
function h(r, e, t) {
var n;
var o = [];
for (var f = e; f < t; f += 3) {
n = (r[f] << 16) + (r[f + 1] << 8) + r[f + 2];
o.push(l(n))
}
return o.join("")
}
function s(r) {
var e;
var t = r.length;
var o = t % 3;
var f = "";
var i = [];
var a = 16383;
for (var u = 0, d = t - o; u < d; u += a) {
i.push(h(r, u, u + a > d ? d : u + a))
}
if (o === 1) {
e = r[t - 1];
f += n[e >> 2];
f += n[e << 4 & 63];
f += "=="
} else {
if (o === 2) {
e = (r[t - 2] << 8) + r[t - 1];
f += n[e >> 10];
f += n[e >> 4 & 63];
f += n[e << 2 & 63];
f += "="
}
}
i.push(f);
return i.join("")
}
}, {}]
}, {}, [])("/")
});
字符串编码
/**
* utf8字符串转为字节数组 同java中 String.getBytes(utf8Str)
* @param utf8Str
* @returns {[]}
*/
var utf8StrToBytes = function (utf8Str) {
var ens = encodeURIComponent(utf8Str);
var es = unescape(ens);
var esLen = es.length;
// Convert
var words = [];
for (var i = 0; i < esLen; i++) {
words[i] = es.charCodeAt(i);
}
return words;
}
/**
* 字节数组转为utf8字符串 同java中 new String(bytes)
* @param bytesArray
* @returns {string}
*/
var bytesToUtf8Str = function (bytesArray) {
var utf8Byte = bytesArray;
var latin1Chars = [];
for (var i = 0; i < utf8Byte.length; i++) {
latin1Chars.push(String.fromCharCode(utf8Byte[i]));
}
return decodeURIComponent(escape(latin1Chars.join('')));
}
测试
base64.fromByteArray(utf8StrToBytes('打快点快点')) // 5omT5b+r54K55b+r54K5
//同Java中 org.apache.commons.codec
Base64.encodeBase64String("打快点快点".getBytes()) // 5omT5b+r54K55b+r54K5
/**
* int 转 byte, js中int转byte(-128—127)
* @param i 整数
*/
var intToByte = function(i) {
var b = i & 0xFF;
var c = 0;
if (b >= 128) {
c = b % 128;
c = -1 * (128 - c);
} else {
c = b;
}
return c
}
```