Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

fix dual package hazard #173

Closed
wants to merge 1 commit into from
Closed

fix dual package hazard #173

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
322 changes: 26 additions & 296 deletions base64.mjs
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,296 +1,26 @@
/**
* base64.ts
*
* Licensed under the BSD 3-Clause License.
* http://opensource.org/licenses/BSD-3-Clause
*
* References:
* http://en.wikipedia.org/wiki/Base64
*
* @author Dan Kogai (https://github.com/dankogai)
*/
const version = '3.7.6';
/**
* @deprecated use lowercase `version`.
*/
const VERSION = version;
const _hasatob = typeof atob === 'function';
const _hasbtoa = typeof btoa === 'function';
const _hasBuffer = typeof Buffer === 'function';
const _TD = typeof TextDecoder === 'function' ? new TextDecoder() : undefined;
const _TE = typeof TextEncoder === 'function' ? new TextEncoder() : undefined;
const b64ch = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
const b64chs = Array.prototype.slice.call(b64ch);
const b64tab = ((a) => {
let tab = {};
a.forEach((c, i) => tab[c] = i);
return tab;
})(b64chs);
const b64re = /^(?:[A-Za-z\d+\/]{4})*?(?:[A-Za-z\d+\/]{2}(?:==)?|[A-Za-z\d+\/]{3}=?)?$/;
const _fromCC = String.fromCharCode.bind(String);
const _U8Afrom = typeof Uint8Array.from === 'function'
? Uint8Array.from.bind(Uint8Array)
: (it) => new Uint8Array(Array.prototype.slice.call(it, 0));
const _mkUriSafe = (src) => src
.replace(/=/g, '').replace(/[+\/]/g, (m0) => m0 == '+' ? '-' : '_');
const _tidyB64 = (s) => s.replace(/[^A-Za-z0-9\+\/]/g, '');
/**
* polyfill version of `btoa`
*/
const btoaPolyfill = (bin) => {
// console.log('polyfilled');
let u32, c0, c1, c2, asc = '';
const pad = bin.length % 3;
for (let i = 0; i < bin.length;) {
if ((c0 = bin.charCodeAt(i++)) > 255 ||
(c1 = bin.charCodeAt(i++)) > 255 ||
(c2 = bin.charCodeAt(i++)) > 255)
throw new TypeError('invalid character found');
u32 = (c0 << 16) | (c1 << 8) | c2;
asc += b64chs[u32 >> 18 & 63]
+ b64chs[u32 >> 12 & 63]
+ b64chs[u32 >> 6 & 63]
+ b64chs[u32 & 63];
}
return pad ? asc.slice(0, pad - 3) + "===".substring(pad) : asc;
};
/**
* does what `window.btoa` of web browsers do.
* @param {String} bin binary string
* @returns {string} Base64-encoded string
*/
const _btoa = _hasbtoa ? (bin) => btoa(bin)
: _hasBuffer ? (bin) => Buffer.from(bin, 'binary').toString('base64')
: btoaPolyfill;
const _fromUint8Array = _hasBuffer
? (u8a) => Buffer.from(u8a).toString('base64')
: (u8a) => {
// cf. https://stackoverflow.com/questions/12710001/how-to-convert-uint8-array-to-base64-encoded-string/12713326#12713326
const maxargs = 0x1000;
let strs = [];
for (let i = 0, l = u8a.length; i < l; i += maxargs) {
strs.push(_fromCC.apply(null, u8a.subarray(i, i + maxargs)));
}
return _btoa(strs.join(''));
};
/**
* converts a Uint8Array to a Base64 string.
* @param {boolean} [urlsafe] URL-and-filename-safe a la RFC4648 §5
* @returns {string} Base64 string
*/
const fromUint8Array = (u8a, urlsafe = false) => urlsafe ? _mkUriSafe(_fromUint8Array(u8a)) : _fromUint8Array(u8a);
// This trick is found broken https://github.com/dankogai/js-base64/issues/130
// const utob = (src: string) => unescape(encodeURIComponent(src));
// reverting good old fationed regexp
const cb_utob = (c) => {
if (c.length < 2) {
var cc = c.charCodeAt(0);
return cc < 0x80 ? c
: cc < 0x800 ? (_fromCC(0xc0 | (cc >>> 6))
+ _fromCC(0x80 | (cc & 0x3f)))
: (_fromCC(0xe0 | ((cc >>> 12) & 0x0f))
+ _fromCC(0x80 | ((cc >>> 6) & 0x3f))
+ _fromCC(0x80 | (cc & 0x3f)));
}
else {
var cc = 0x10000
+ (c.charCodeAt(0) - 0xD800) * 0x400
+ (c.charCodeAt(1) - 0xDC00);
return (_fromCC(0xf0 | ((cc >>> 18) & 0x07))
+ _fromCC(0x80 | ((cc >>> 12) & 0x3f))
+ _fromCC(0x80 | ((cc >>> 6) & 0x3f))
+ _fromCC(0x80 | (cc & 0x3f)));
}
};
const re_utob = /[\uD800-\uDBFF][\uDC00-\uDFFFF]|[^\x00-\x7F]/g;
/**
* @deprecated should have been internal use only.
* @param {string} src UTF-8 string
* @returns {string} UTF-16 string
*/
const utob = (u) => u.replace(re_utob, cb_utob);
//
const _encode = _hasBuffer
? (s) => Buffer.from(s, 'utf8').toString('base64')
: _TE
? (s) => _fromUint8Array(_TE.encode(s))
: (s) => _btoa(utob(s));
/**
* converts a UTF-8-encoded string to a Base64 string.
* @param {boolean} [urlsafe] if `true` make the result URL-safe
* @returns {string} Base64 string
*/
const encode = (src, urlsafe = false) => urlsafe
? _mkUriSafe(_encode(src))
: _encode(src);
/**
* converts a UTF-8-encoded string to URL-safe Base64 RFC4648 §5.
* @returns {string} Base64 string
*/
const encodeURI = (src) => encode(src, true);
// This trick is found broken https://github.com/dankogai/js-base64/issues/130
// const btou = (src: string) => decodeURIComponent(escape(src));
// reverting good old fationed regexp
const re_btou = /[\xC0-\xDF][\x80-\xBF]|[\xE0-\xEF][\x80-\xBF]{2}|[\xF0-\xF7][\x80-\xBF]{3}/g;
const cb_btou = (cccc) => {
switch (cccc.length) {
case 4:
var cp = ((0x07 & cccc.charCodeAt(0)) << 18)
| ((0x3f & cccc.charCodeAt(1)) << 12)
| ((0x3f & cccc.charCodeAt(2)) << 6)
| (0x3f & cccc.charCodeAt(3)), offset = cp - 0x10000;
return (_fromCC((offset >>> 10) + 0xD800)
+ _fromCC((offset & 0x3FF) + 0xDC00));
case 3:
return _fromCC(((0x0f & cccc.charCodeAt(0)) << 12)
| ((0x3f & cccc.charCodeAt(1)) << 6)
| (0x3f & cccc.charCodeAt(2)));
default:
return _fromCC(((0x1f & cccc.charCodeAt(0)) << 6)
| (0x3f & cccc.charCodeAt(1)));
}
};
/**
* @deprecated should have been internal use only.
* @param {string} src UTF-16 string
* @returns {string} UTF-8 string
*/
const btou = (b) => b.replace(re_btou, cb_btou);
/**
* polyfill version of `atob`
*/
const atobPolyfill = (asc) => {
// console.log('polyfilled');
asc = asc.replace(/\s+/g, '');
if (!b64re.test(asc))
throw new TypeError('malformed base64.');
asc += '=='.slice(2 - (asc.length & 3));
let u24, bin = '', r1, r2;
for (let i = 0; i < asc.length;) {
u24 = b64tab[asc.charAt(i++)] << 18
| b64tab[asc.charAt(i++)] << 12
| (r1 = b64tab[asc.charAt(i++)]) << 6
| (r2 = b64tab[asc.charAt(i++)]);
bin += r1 === 64 ? _fromCC(u24 >> 16 & 255)
: r2 === 64 ? _fromCC(u24 >> 16 & 255, u24 >> 8 & 255)
: _fromCC(u24 >> 16 & 255, u24 >> 8 & 255, u24 & 255);
}
return bin;
};
/**
* does what `window.atob` of web browsers do.
* @param {String} asc Base64-encoded string
* @returns {string} binary string
*/
const _atob = _hasatob ? (asc) => atob(_tidyB64(asc))
: _hasBuffer ? (asc) => Buffer.from(asc, 'base64').toString('binary')
: atobPolyfill;
//
const _toUint8Array = _hasBuffer
? (a) => _U8Afrom(Buffer.from(a, 'base64'))
: (a) => _U8Afrom(_atob(a).split('').map(c => c.charCodeAt(0)));
/**
* converts a Base64 string to a Uint8Array.
*/
const toUint8Array = (a) => _toUint8Array(_unURI(a));
//
const _decode = _hasBuffer
? (a) => Buffer.from(a, 'base64').toString('utf8')
: _TD
? (a) => _TD.decode(_toUint8Array(a))
: (a) => btou(_atob(a));
const _unURI = (a) => _tidyB64(a.replace(/[-_]/g, (m0) => m0 == '-' ? '+' : '/'));
/**
* converts a Base64 string to a UTF-8 string.
* @param {String} src Base64 string. Both normal and URL-safe are supported
* @returns {string} UTF-8 string
*/
const decode = (src) => _decode(_unURI(src));
/**
* check if a value is a valid Base64 string
* @param {String} src a value to check
*/
const isValid = (src) => {
if (typeof src !== 'string')
return false;
const s = src.replace(/\s+/g, '').replace(/={0,2}$/, '');
return !/[^\s0-9a-zA-Z\+/]/.test(s) || !/[^\s0-9a-zA-Z\-_]/.test(s);
};
//
const _noEnum = (v) => {
return {
value: v, enumerable: false, writable: true, configurable: true
};
};
/**
* extend String.prototype with relevant methods
*/
const extendString = function () {
const _add = (name, body) => Object.defineProperty(String.prototype, name, _noEnum(body));
_add('fromBase64', function () { return decode(this); });
_add('toBase64', function (urlsafe) { return encode(this, urlsafe); });
_add('toBase64URI', function () { return encode(this, true); });
_add('toBase64URL', function () { return encode(this, true); });
_add('toUint8Array', function () { return toUint8Array(this); });
};
/**
* extend Uint8Array.prototype with relevant methods
*/
const extendUint8Array = function () {
const _add = (name, body) => Object.defineProperty(Uint8Array.prototype, name, _noEnum(body));
_add('toBase64', function (urlsafe) { return fromUint8Array(this, urlsafe); });
_add('toBase64URI', function () { return fromUint8Array(this, true); });
_add('toBase64URL', function () { return fromUint8Array(this, true); });
};
/**
* extend Builtin prototypes with relevant methods
*/
const extendBuiltins = () => {
extendString();
extendUint8Array();
};
const gBase64 = {
version: version,
VERSION: VERSION,
atob: _atob,
atobPolyfill: atobPolyfill,
btoa: _btoa,
btoaPolyfill: btoaPolyfill,
fromBase64: decode,
toBase64: encode,
encode: encode,
encodeURI: encodeURI,
encodeURL: encodeURI,
utob: utob,
btou: btou,
decode: decode,
isValid: isValid,
fromUint8Array: fromUint8Array,
toUint8Array: toUint8Array,
extendString: extendString,
extendUint8Array: extendUint8Array,
extendBuiltins: extendBuiltins
};
// makecjs:CUT //
export { version };
export { VERSION };
export { _atob as atob };
export { atobPolyfill };
export { _btoa as btoa };
export { btoaPolyfill };
export { decode as fromBase64 };
export { encode as toBase64 };
export { utob };
export { encode };
export { encodeURI };
export { encodeURI as encodeURL };
export { btou };
export { decode };
export { isValid };
export { fromUint8Array };
export { toUint8Array };
export { extendString };
export { extendUint8Array };
export { extendBuiltins };
// and finally,
export { gBase64 as Base64 };
import exports from "./base64.js";

export const {
version,
VERSION,
atob,
atobPolyfill,
btoa,
btoaPolyfill,
fromBase64,
toBase64,
encode,
encodeURI,
encodeURL,
utob,
btou,
decode,
isValid,
fromUint8Array,
toUint8Array,
extendString,
extendUint8Array,
extendBuiltins,
Base64,
} = exports;
export default exports;