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Uint8Array : Array; var inited = false; function init () { inited = true; var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; for (var i = 0, len = code.length; i < len; ++i) { lookup[i] = code[i]; revLookup[code.charCodeAt(i)] = i; } revLookup['-'.charCodeAt(0)] = 62; revLookup['_'.charCodeAt(0)] = 63; } function toByteArray (b64) { if (!inited) { init(); } var i, j, l, tmp, placeHolders, arr; var len = b64.length; if (len % 4 > 0) { throw new Error('Invalid string. Length must be a multiple of 4') } // the number of equal signs (place holders) // if there are two placeholders, than the two characters before it // represent one byte // if there is only one, then the three characters before it represent 2 bytes // this is just a cheap hack to not do indexOf twice placeHolders = b64[len - 2] === '=' ? 2 : b64[len - 1] === '=' ? 1 : 0; // base64 is 4/3 + up to two characters of the original data arr = new Arr(len * 3 / 4 - placeHolders); // if there are placeholders, only get up to the last complete 4 chars l = placeHolders > 0 ? len - 4 : len; var L = 0; for (i = 0, j = 0; i < l; i += 4, j += 3) { tmp = (revLookup[b64.charCodeAt(i)] << 18) | (revLookup[b64.charCodeAt(i + 1)] << 12) | (revLookup[b64.charCodeAt(i + 2)] << 6) | revLookup[b64.charCodeAt(i + 3)]; arr[L++] = (tmp >> 16) & 0xFF; arr[L++] = (tmp >> 8) & 0xFF; arr[L++] = tmp & 0xFF; } if (placeHolders === 2) { tmp = (revLookup[b64.charCodeAt(i)] << 2) | (revLookup[b64.charCodeAt(i + 1)] >> 4); arr[L++] = tmp & 0xFF; } else if (placeHolders === 1) { tmp = (revLookup[b64.charCodeAt(i)] << 10) | (revLookup[b64.charCodeAt(i + 1)] << 4) | (revLookup[b64.charCodeAt(i + 2)] >> 2); arr[L++] = (tmp >> 8) & 0xFF; arr[L++] = tmp & 0xFF; } return arr } function tripletToBase64 (num) { return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F] } function encodeChunk (uint8, start, end) { var tmp; var output = []; for (var i = start; i < end; i += 3) { tmp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2]); output.push(tripletToBase64(tmp)); } return output.join('') } function fromByteArray (uint8) { if (!inited) { init(); } var tmp; var len = uint8.length; var extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes var output = ''; var parts = []; var maxChunkLength = 16383; // must be multiple of 3 // go through the array every three bytes, we'll deal with trailing stuff later for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) { parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength))); } // pad the end with zeros, but make sure to not forget the extra bytes if (extraBytes === 1) { tmp = uint8[len - 1]; output += lookup[tmp >> 2]; output += lookup[(tmp << 4) & 0x3F]; output += '=='; } else if (extraBytes === 2) { tmp = (uint8[len - 2] << 8) + (uint8[len - 1]); output += lookup[tmp >> 10]; output += lookup[(tmp >> 4) & 0x3F]; output += lookup[(tmp << 2) & 0x3F]; output += '='; } parts.push(output); return parts.join('') } function read (buffer, offset, isLE, mLen, nBytes) { var e, m; var eLen = nBytes * 8 - mLen - 1; var eMax = (1 << eLen) - 1; var eBias = eMax >> 1; var nBits = -7; var i = isLE ? (nBytes - 1) : 0; var d = isLE ? -1 : 1; var s = buffer[offset + i]; i += d; e = s & ((1 << (-nBits)) - 1); s >>= (-nBits); nBits += eLen; for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {} m = e & ((1 << (-nBits)) - 1); e >>= (-nBits); nBits += mLen; for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {} if (e === 0) { e = 1 - eBias; } else if (e === eMax) { return m ? NaN : ((s ? -1 : 1) * Infinity) } else { m = m + Math.pow(2, mLen); e = e - eBias; } return (s ? -1 : 1) * m * Math.pow(2, e - mLen) } function write (buffer, value, offset, isLE, mLen, nBytes) { var e, m, c; var eLen = nBytes * 8 - mLen - 1; var eMax = (1 << eLen) - 1; var eBias = eMax >> 1; var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0); var i = isLE ? 0 : (nBytes - 1); var d = isLE ? 1 : -1; var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0; value = Math.abs(value); if (isNaN(value) || value === Infinity) { m = isNaN(value) ? 1 : 0; e = eMax; } else { e = Math.floor(Math.log(value) / Math.LN2); if (value * (c = Math.pow(2, -e)) < 1) { e--; c *= 2; } if (e + eBias >= 1) { value += rt / c; } else { value += rt * Math.pow(2, 1 - eBias); } if (value * c >= 2) { e++; c /= 2; } if (e + eBias >= eMax) { m = 0; e = eMax; } else if (e + eBias >= 1) { m = (value * c - 1) * Math.pow(2, mLen); e = e + eBias; } else { m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen); e = 0; } } for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {} e = (e << mLen) | m; eLen += mLen; for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {} buffer[offset + i - d] |= s * 128; } var toString = {}.toString; var isArray = Array.isArray || function (arr) { return toString.call(arr) == '[object Array]'; }; var INSPECT_MAX_BYTES = 50; /** * If `Buffer.TYPED_ARRAY_SUPPORT`: * === true Use Uint8Array implementation (fastest) * === false Use Object implementation (most compatible, even IE6) * * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+, * Opera 11.6+, iOS 4.2+. * * Due to various browser bugs, sometimes the Object implementation will be used even * when the browser supports typed arrays. * * Note: * * - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances, * See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438. * * - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function. * * - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of * incorrect length in some situations. * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they * get the Object implementation, which is slower but behaves correctly. */ Buffer.TYPED_ARRAY_SUPPORT = global$1.TYPED_ARRAY_SUPPORT !== undefined ? global$1.TYPED_ARRAY_SUPPORT : true; function kMaxLength () { return Buffer.TYPED_ARRAY_SUPPORT ? 0x7fffffff : 0x3fffffff } function createBuffer (that, length) { if (kMaxLength() < length) { throw new RangeError('Invalid typed array length') } if (Buffer.TYPED_ARRAY_SUPPORT) { // Return an augmented `Uint8Array` instance, for best performance that = new Uint8Array(length); that.__proto__ = Buffer.prototype; } else { // Fallback: Return an object instance of the Buffer class if (that === null) { that = new Buffer(length); } that.length = length; } return that } /** * The Buffer constructor returns instances of `Uint8Array` that have their * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of * `Uint8Array`, so the returned instances will have all the node `Buffer` methods * and the `Uint8Array` methods. Square bracket notation works as expected -- it * returns a single octet. * * The `Uint8Array` prototype remains unmodified. */ function Buffer (arg, encodingOrOffset, length) { if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) { return new Buffer(arg, encodingOrOffset, length) } // Common case. if (typeof arg === 'number') { if (typeof encodingOrOffset === 'string') { throw new Error( 'If encoding is specified then the first argument must be a string' ) } return allocUnsafe(this, arg) } return from(this, arg, encodingOrOffset, length) } Buffer.poolSize = 8192; // not used by this implementation // TODO: Legacy, not needed anymore. Remove in next major version. Buffer._augment = function (arr) { arr.__proto__ = Buffer.prototype; return arr }; function from (that, value, encodingOrOffset, length) { if (typeof value === 'number') { throw new TypeError('"value" argument must not be a number') } if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) { return fromArrayBuffer(that, value, encodingOrOffset, length) } if (typeof value === 'string') { return fromString(that, value, encodingOrOffset) } return fromObject(that, value) } /** * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError * if value is a number. * Buffer.from(str[, encoding]) * Buffer.from(array) * Buffer.from(buffer) * Buffer.from(arrayBuffer[, byteOffset[, length]]) **/ Buffer.from = function (value, encodingOrOffset, length) { return from(null, value, encodingOrOffset, length) }; if (Buffer.TYPED_ARRAY_SUPPORT) { Buffer.prototype.__proto__ = Uint8Array.prototype; Buffer.__proto__ = Uint8Array; } function assertSize (size) { if (typeof size !== 'number') { throw new TypeError('"size" argument must be a number') } else if (size < 0) { throw new RangeError('"size" argument must not be negative') } } function alloc (that, size, fill, encoding) { assertSize(size); if (size <= 0) { return createBuffer(that, size) } if (fill !== undefined) { // Only pay attention to encoding if it's a string. This // prevents accidentally sending in a number that would // be interpretted as a start offset. return typeof encoding === 'string' ? createBuffer(that, size).fill(fill, encoding) : createBuffer(that, size).fill(fill) } return createBuffer(that, size) } /** * Creates a new filled Buffer instance. * alloc(size[, fill[, encoding]]) **/ Buffer.alloc = function (size, fill, encoding) { return alloc(null, size, fill, encoding) }; function allocUnsafe (that, size) { assertSize(size); that = createBuffer(that, size < 0 ? 0 : checked(size) | 0); if (!Buffer.TYPED_ARRAY_SUPPORT) { for (var i = 0; i < size; ++i) { that[i] = 0; } } return that } /** * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance. * */ Buffer.allocUnsafe = function (size) { return allocUnsafe(null, size) }; /** * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance. */ Buffer.allocUnsafeSlow = function (size) { return allocUnsafe(null, size) }; function fromString (that, string, encoding) { if (typeof encoding !== 'string' || encoding === '') { encoding = 'utf8'; } if (!Buffer.isEncoding(encoding)) { throw new TypeError('"encoding" must be a valid string encoding') } var length = byteLength(string, encoding) | 0; that = createBuffer(that, length); var actual = that.write(string, encoding); if (actual !== length) { // Writing a hex string, for example, that contains invalid characters will // cause everything after the first invalid character to be ignored. (e.g. // 'abxxcd' will be treated as 'ab') that = that.slice(0, actual); } return that } function fromArrayLike (that, array) { var length = array.length < 0 ? 0 : checked(array.length) | 0; that = createBuffer(that, length); for (var i = 0; i < length; i += 1) { that[i] = array[i] & 255; } return that } function fromArrayBuffer (that, array, byteOffset, length) { array.byteLength; // this throws if `array` is not a valid ArrayBuffer if (byteOffset < 0 || array.byteLength < byteOffset) { throw new RangeError('\'offset\' is out of bounds') } if (array.byteLength < byteOffset + (length || 0)) { throw new RangeError('\'length\' is out of bounds') } if (byteOffset === undefined && length === undefined) { array = new Uint8Array(array); } else if (length === undefined) { array = new Uint8Array(array, byteOffset); } else { array = new Uint8Array(array, byteOffset, length); } if (Buffer.TYPED_ARRAY_SUPPORT) { // Return an augmented `Uint8Array` instance, for best performance that = array; that.__proto__ = Buffer.prototype; } else { // Fallback: Return an object instance of the Buffer class that = fromArrayLike(that, array); } return that } function fromObject (that, obj) { if (internalIsBuffer(obj)) { var len = checked(obj.length) | 0; that = createBuffer(that, len); if (that.length === 0) { return that } obj.copy(that, 0, 0, len); return that } if (obj) { if ((typeof ArrayBuffer !== 'undefined' && obj.buffer instanceof ArrayBuffer) || 'length' in obj) { if (typeof obj.length !== 'number' || isnan(obj.length)) { return createBuffer(that, 0) } return fromArrayLike(that, obj) } if (obj.type === 'Buffer' && isArray(obj.data)) { return fromArrayLike(that, obj.data) } } throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.') } function checked (length) { // Note: cannot use `length < kMaxLength()` here because that fails when // length is NaN (which is otherwise coerced to zero.) if (length >= kMaxLength()) { throw new RangeError('Attempt to allocate Buffer larger than maximum ' + 'size: 0x' + kMaxLength().toString(16) + ' bytes') } return length | 0 } Buffer.isBuffer = isBuffer; function internalIsBuffer (b) { return !!(b != null && b._isBuffer) } Buffer.compare = function compare (a, b) { if (!internalIsBuffer(a) || !internalIsBuffer(b)) { throw new TypeError('Arguments must be Buffers') } if (a === b) return 0 var x = a.length; var y = b.length; for (var i = 0, len = Math.min(x, y); i < len; ++i) { if (a[i] !== b[i]) { x = a[i]; y = b[i]; break } } if (x < y) return -1 if (y < x) return 1 return 0 }; Buffer.isEncoding = function isEncoding (encoding) { switch (String(encoding).toLowerCase()) { case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'latin1': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': return true default: return false } }; Buffer.concat = function concat (list, length) { if (!isArray(list)) { throw new TypeError('"list" argument must be an Array of Buffers') } if (list.length === 0) { return Buffer.alloc(0) } var i; if (length === undefined) { length = 0; for (i = 0; i < list.length; ++i) { length += list[i].length; } } var buffer = Buffer.allocUnsafe(length); var pos = 0; for (i = 0; i < list.length; ++i) { var buf = list[i]; if (!internalIsBuffer(buf)) { throw new TypeError('"list" argument must be an Array of Buffers') } buf.copy(buffer, pos); pos += buf.length; } return buffer }; function byteLength (string, encoding) { if (internalIsBuffer(string)) { return string.length } if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' && (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) { return string.byteLength } if (typeof string !== 'string') { string = '' + string; } var len = string.length; if (len === 0) return 0 // Use a for loop to avoid recursion var loweredCase = false; for (;;) { switch (encoding) { case 'ascii': case 'latin1': case 'binary': return len case 'utf8': case 'utf-8': case undefined: return utf8ToBytes(string).length case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': return len * 2 case 'hex': return len >>> 1 case 'base64': return base64ToBytes(string).length default: if (loweredCase) return utf8ToBytes(string).length // assume utf8 encoding = ('' + encoding).toLowerCase(); loweredCase = true; } } } Buffer.byteLength = byteLength; function slowToString (encoding, start, end) { var loweredCase = false; // No need to verify that "this.length <= MAX_UINT32" since it's a read-only // property of a typed array. // This behaves neither like String nor Uint8Array in that we set start/end // to their upper/lower bounds if the value passed is out of range. // undefined is handled specially as per ECMA-262 6th Edition, // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization. if (start === undefined || start < 0) { start = 0; } // Return early if start > this.length. Done here to prevent potential uint32 // coercion fail below. if (start > this.length) { return '' } if (end === undefined || end > this.length) { end = this.length; } if (end <= 0) { return '' } // Force coersion to uint32. This will also coerce falsey/NaN values to 0. end >>>= 0; start >>>= 0; if (end <= start) { return '' } if (!encoding) encoding = 'utf8'; while (true) { switch (encoding) { case 'hex': return hexSlice(this, start, end) case 'utf8': case 'utf-8': return utf8Slice(this, start, end) case 'ascii': return asciiSlice(this, start, end) case 'latin1': case 'binary': return latin1Slice(this, start, end) case 'base64': return base64Slice(this, start, end) case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': return utf16leSlice(this, start, end) default: if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding) encoding = (encoding + '').toLowerCase(); loweredCase = true; } } } // The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect // Buffer instances. Buffer.prototype._isBuffer = true; function swap (b, n, m) { var i = b[n]; b[n] = b[m]; b[m] = i; } Buffer.prototype.swap16 = function swap16 () { var len = this.length; if (len % 2 !== 0) { throw new RangeError('Buffer size must be a multiple of 16-bits') } for (var i = 0; i < len; i += 2) { swap(this, i, i + 1); } return this }; Buffer.prototype.swap32 = function swap32 () { var len = this.length; if (len % 4 !== 0) { throw new RangeError('Buffer size must be a multiple of 32-bits') } for (var i = 0; i < len; i += 4) { swap(this, i, i + 3); swap(this, i + 1, i + 2); } return this }; Buffer.prototype.swap64 = function swap64 () { var len = this.length; if (len % 8 !== 0) { throw new RangeError('Buffer size must be a multiple of 64-bits') } for (var i = 0; i < len; i += 8) { swap(this, i, i + 7); swap(this, i + 1, i + 6); swap(this, i + 2, i + 5); swap(this, i + 3, i + 4); } return this }; Buffer.prototype.toString = function toString () { var length = this.length | 0; if (length === 0) return '' if (arguments.length === 0) return utf8Slice(this, 0, length) return slowToString.apply(this, arguments) }; Buffer.prototype.equals = function equals (b) { if (!internalIsBuffer(b)) throw new TypeError('Argument must be a Buffer') if (this === b) return true return Buffer.compare(this, b) === 0 }; Buffer.prototype.inspect = function inspect () { var str = ''; var max = INSPECT_MAX_BYTES; if (this.length > 0) { str = this.toString('hex', 0, max).match(/.{2}/g).join(' '); if (this.length > max) str += ' ... '; } return '' }; Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) { if (!internalIsBuffer(target)) { throw new TypeError('Argument must be a Buffer') } if (start === undefined) { start = 0; } if (end === undefined) { end = target ? target.length : 0; } if (thisStart === undefined) { thisStart = 0; } if (thisEnd === undefined) { thisEnd = this.length; } if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) { throw new RangeError('out of range index') } if (thisStart >= thisEnd && start >= end) { return 0 } if (thisStart >= thisEnd) { return -1 } if (start >= end) { return 1 } start >>>= 0; end >>>= 0; thisStart >>>= 0; thisEnd >>>= 0; if (this === target) return 0 var x = thisEnd - thisStart; var y = end - start; var len = Math.min(x, y); var thisCopy = this.slice(thisStart, thisEnd); var targetCopy = target.slice(start, end); for (var i = 0; i < len; ++i) { if (thisCopy[i] !== targetCopy[i]) { x = thisCopy[i]; y = targetCopy[i]; break } } if (x < y) return -1 if (y < x) return 1 return 0 }; // Finds either the first index of `val` in `buffer` at offset >= `byteOffset`, // OR the last index of `val` in `buffer` at offset <= `byteOffset`. // // Arguments: // - buffer - a Buffer to search // - val - a string, Buffer, or number // - byteOffset - an index into `buffer`; will be clamped to an int32 // - encoding - an optional encoding, relevant is val is a string // - dir - true for indexOf, false for lastIndexOf function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) { // Empty buffer means no match if (buffer.length === 0) return -1 // Normalize byteOffset if (typeof byteOffset === 'string') { encoding = byteOffset; byteOffset = 0; } else if (byteOffset > 0x7fffffff) { byteOffset = 0x7fffffff; } else if (byteOffset < -0x80000000) { byteOffset = -0x80000000; } byteOffset = +byteOffset; // Coerce to Number. if (isNaN(byteOffset)) { // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer byteOffset = dir ? 0 : (buffer.length - 1); } // Normalize byteOffset: negative offsets start from the end of the buffer if (byteOffset < 0) byteOffset = buffer.length + byteOffset; if (byteOffset >= buffer.length) { if (dir) return -1 else byteOffset = buffer.length - 1; } else if (byteOffset < 0) { if (dir) byteOffset = 0; else return -1 } // Normalize val if (typeof val === 'string') { val = Buffer.from(val, encoding); } // Finally, search either indexOf (if dir is true) or lastIndexOf if (internalIsBuffer(val)) { // Special case: looking for empty string/buffer always fails if (val.length === 0) { return -1 } return arrayIndexOf(buffer, val, byteOffset, encoding, dir) } else if (typeof val === 'number') { val = val & 0xFF; // Search for a byte value [0-255] if (Buffer.TYPED_ARRAY_SUPPORT && typeof Uint8Array.prototype.indexOf === 'function') { if (dir) { return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset) } else { return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset) } } return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir) } throw new TypeError('val must be string, number or Buffer') } function arrayIndexOf (arr, val, byteOffset, encoding, dir) { var indexSize = 1; var arrLength = arr.length; var valLength = val.length; if (encoding !== undefined) { encoding = String(encoding).toLowerCase(); if (encoding === 'ucs2' || encoding === 'ucs-2' || encoding === 'utf16le' || encoding === 'utf-16le') { if (arr.length < 2 || val.length < 2) { return -1 } indexSize = 2; arrLength /= 2; valLength /= 2; byteOffset /= 2; } } function read (buf, i) { if (indexSize === 1) { return buf[i] } else { return buf.readUInt16BE(i * indexSize) } } var i; if (dir) { var foundIndex = -1; for (i = byteOffset; i < arrLength; i++) { if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) { if (foundIndex === -1) foundIndex = i; if (i - foundIndex + 1 === valLength) return foundIndex * indexSize } else { if (foundIndex !== -1) i -= i - foundIndex; foundIndex = -1; } } } else { if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength; for (i = byteOffset; i >= 0; i--) { var found = true; for (var j = 0; j < valLength; j++) { if (read(arr, i + j) !== read(val, j)) { found = false; break } } if (found) return i } } return -1 } Buffer.prototype.includes = function includes (val, byteOffset, encoding) { return this.indexOf(val, byteOffset, encoding) !== -1 }; Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) { return bidirectionalIndexOf(this, val, byteOffset, encoding, true) }; Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) { return bidirectionalIndexOf(this, val, byteOffset, encoding, false) }; function hexWrite (buf, string, offset, length) { offset = Number(offset) || 0; var remaining = buf.length - offset; if (!length) { length = remaining; } else { length = Number(length); if (length > remaining) { length = remaining; } } // must be an even number of digits var strLen = string.length; if (strLen % 2 !== 0) throw new TypeError('Invalid hex string') if (length > strLen / 2) { length = strLen / 2; } for (var i = 0; i < length; ++i) { var parsed = parseInt(string.substr(i * 2, 2), 16); if (isNaN(parsed)) return i buf[offset + i] = parsed; } return i } function utf8Write (buf, string, offset, length) { return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length) } function asciiWrite (buf, string, offset, length) { return blitBuffer(asciiToBytes(string), buf, offset, length) } function latin1Write (buf, string, offset, length) { return asciiWrite(buf, string, offset, length) } function base64Write (buf, string, offset, length) { return blitBuffer(base64ToBytes(string), buf, offset, length) } function ucs2Write (buf, string, offset, length) { return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length) } Buffer.prototype.write = function write (string, offset, length, encoding) { // Buffer#write(string) if (offset === undefined) { encoding = 'utf8'; length = this.length; offset = 0; // Buffer#write(string, encoding) } else if (length === undefined && typeof offset === 'string') { encoding = offset; length = this.length; offset = 0; // Buffer#write(string, offset[, length][, encoding]) } else if (isFinite(offset)) { offset = offset | 0; if (isFinite(length)) { length = length | 0; if (encoding === undefined) encoding = 'utf8'; } else { encoding = length; length = undefined; } // legacy write(string, encoding, offset, length) - remove in v0.13 } else { throw new Error( 'Buffer.write(string, encoding, offset[, length]) is no longer supported' ) } var remaining = this.length - offset; if (length === undefined || length > remaining) length = remaining; if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) { throw new RangeError('Attempt to write outside buffer bounds') } if (!encoding) encoding = 'utf8'; var loweredCase = false; for (;;) { switch (encoding) { case 'hex': return hexWrite(this, string, offset, length) case 'utf8': case 'utf-8': return utf8Write(this, string, offset, length) case 'ascii': return asciiWrite(this, string, offset, length) case 'latin1': case 'binary': return latin1Write(this, string, offset, length) case 'base64': // Warning: maxLength not taken into account in base64Write return base64Write(this, string, offset, length) case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': return ucs2Write(this, string, offset, length) default: if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding) encoding = ('' + encoding).toLowerCase(); loweredCase = true; } } }; Buffer.prototype.toJSON = function toJSON () { return { type: 'Buffer', data: Array.prototype.slice.call(this._arr || this, 0) } }; function base64Slice (buf, start, end) { if (start === 0 && end === buf.length) { return fromByteArray(buf) } else { return fromByteArray(buf.slice(start, end)) } } function utf8Slice (buf, start, end) { end = Math.min(buf.length, end); var res = []; var i = start; while (i < end) { var firstByte = buf[i]; var codePoint = null; var bytesPerSequence = (firstByte > 0xEF) ? 4 : (firstByte > 0xDF) ? 3 : (firstByte > 0xBF) ? 2 : 1; if (i + bytesPerSequence <= end) { var secondByte, thirdByte, fourthByte, tempCodePoint; switch (bytesPerSequence) { case 1: if (firstByte < 0x80) { codePoint = firstByte; } break case 2: secondByte = buf[i + 1]; if ((secondByte & 0xC0) === 0x80) { tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F); if (tempCodePoint > 0x7F) { codePoint = tempCodePoint; } } break case 3: secondByte = buf[i + 1]; thirdByte = buf[i + 2]; if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) { tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F); if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) { codePoint = tempCodePoint; } } break case 4: secondByte = buf[i + 1]; thirdByte = buf[i + 2]; fourthByte = buf[i + 3]; if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) { tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F); if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) { codePoint = tempCodePoint; } } } } if (codePoint === null) { // we did not generate a valid codePoint so insert a // replacement char (U+FFFD) and advance only 1 byte codePoint = 0xFFFD; bytesPerSequence = 1; } else if (codePoint > 0xFFFF) { // encode to utf16 (surrogate pair dance) codePoint -= 0x10000; res.push(codePoint >>> 10 & 0x3FF | 0xD800); codePoint = 0xDC00 | codePoint & 0x3FF; } res.push(codePoint); i += bytesPerSequence; } return decodeCodePointsArray(res) } // Based on http://stackoverflow.com/a/22747272/680742, the browser with // the lowest limit is Chrome, with 0x10000 args. // We go 1 magnitude less, for safety var MAX_ARGUMENTS_LENGTH = 0x1000; function decodeCodePointsArray (codePoints) { var len = codePoints.length; if (len <= MAX_ARGUMENTS_LENGTH) { return String.fromCharCode.apply(String, codePoints) // avoid extra slice() } // Decode in chunks to avoid "call stack size exceeded". var res = ''; var i = 0; while (i < len) { res += String.fromCharCode.apply( String, codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH) ); } return res } function asciiSlice (buf, start, end) { var ret = ''; end = Math.min(buf.length, end); for (var i = start; i < end; ++i) { ret += String.fromCharCode(buf[i] & 0x7F); } return ret } function latin1Slice (buf, start, end) { var ret = ''; end = Math.min(buf.length, end); for (var i = start; i < end; ++i) { ret += String.fromCharCode(buf[i]); } return ret } function hexSlice (buf, start, end) { var len = buf.length; if (!start || start < 0) start = 0; if (!end || end < 0 || end > len) end = len; var out = ''; for (var i = start; i < end; ++i) { out += toHex(buf[i]); } return out } function utf16leSlice (buf, start, end) { var bytes = buf.slice(start, end); var res = ''; for (var i = 0; i < bytes.length; i += 2) { res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256); } return res } Buffer.prototype.slice = function slice (start, end) { var len = this.length; start = ~~start; end = end === undefined ? len : ~~end; if (start < 0) { start += len; if (start < 0) start = 0; } else if (start > len) { start = len; } if (end < 0) { end += len; if (end < 0) end = 0; } else if (end > len) { end = len; } if (end < start) end = start; var newBuf; if (Buffer.TYPED_ARRAY_SUPPORT) { newBuf = this.subarray(start, end); newBuf.__proto__ = Buffer.prototype; } else { var sliceLen = end - start; newBuf = new Buffer(sliceLen, undefined); for (var i = 0; i < sliceLen; ++i) { newBuf[i] = this[i + start]; } } return newBuf }; /* * Need to make sure that buffer isn't trying to write out of bounds. */ function checkOffset (offset, ext, length) { if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint') if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length') } Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) { offset = offset | 0; byteLength = byteLength | 0; if (!noAssert) checkOffset(offset, byteLength, this.length); var val = this[offset]; var mul = 1; var i = 0; while (++i < byteLength && (mul *= 0x100)) { val += this[offset + i] * mul; } return val }; Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) { offset = offset | 0; byteLength = byteLength | 0; if (!noAssert) { checkOffset(offset, byteLength, this.length); } var val = this[offset + --byteLength]; var mul = 1; while (byteLength > 0 && (mul *= 0x100)) { val += this[offset + --byteLength] * mul; } return val }; Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) { if (!noAssert) checkOffset(offset, 1, this.length); return this[offset] }; Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) { if (!noAssert) checkOffset(offset, 2, this.length); return this[offset] | (this[offset + 1] << 8) }; Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) { if (!noAssert) checkOffset(offset, 2, this.length); return (this[offset] << 8) | this[offset + 1] }; Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) { if (!noAssert) checkOffset(offset, 4, this.length); return ((this[offset]) | (this[offset + 1] << 8) | (this[offset + 2] << 16)) + (this[offset + 3] * 0x1000000) }; Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) { if (!noAssert) checkOffset(offset, 4, this.length); return (this[offset] * 0x1000000) + ((this[offset + 1] << 16) | (this[offset + 2] << 8) | this[offset + 3]) }; Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) { offset = offset | 0; byteLength = byteLength | 0; if (!noAssert) checkOffset(offset, byteLength, this.length); var val = this[offset]; var mul = 1; var i = 0; while (++i < byteLength && (mul *= 0x100)) { val += this[offset + i] * mul; } mul *= 0x80; if (val >= mul) val -= Math.pow(2, 8 * byteLength); return val }; Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) { offset = offset | 0; byteLength = byteLength | 0; if (!noAssert) checkOffset(offset, byteLength, this.length); var i = byteLength; var mul = 1; var val = this[offset + --i]; while (i > 0 && (mul *= 0x100)) { val += this[offset + --i] * mul; } mul *= 0x80; if (val >= mul) val -= Math.pow(2, 8 * byteLength); return val }; Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) { if (!noAssert) checkOffset(offset, 1, this.length); if (!(this[offset] & 0x80)) return (this[offset]) return ((0xff - this[offset] + 1) * -1) }; Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) { if (!noAssert) checkOffset(offset, 2, this.length); var val = this[offset] | (this[offset + 1] << 8); return (val & 0x8000) ? val | 0xFFFF0000 : val }; Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) { if (!noAssert) checkOffset(offset, 2, this.length); var val = this[offset + 1] | (this[offset] << 8); return (val & 0x8000) ? val | 0xFFFF0000 : val }; Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) { if (!noAssert) checkOffset(offset, 4, this.length); return (this[offset]) | (this[offset + 1] << 8) | (this[offset + 2] << 16) | (this[offset + 3] << 24) }; Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) { if (!noAssert) checkOffset(offset, 4, this.length); return (this[offset] << 24) | (this[offset + 1] << 16) | (this[offset + 2] << 8) | (this[offset + 3]) }; Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) { if (!noAssert) checkOffset(offset, 4, this.length); return read(this, offset, true, 23, 4) }; Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) { if (!noAssert) checkOffset(offset, 4, this.length); return read(this, offset, false, 23, 4) }; Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) { if (!noAssert) checkOffset(offset, 8, this.length); return read(this, offset, true, 52, 8) }; Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) { if (!noAssert) checkOffset(offset, 8, this.length); return read(this, offset, false, 52, 8) }; function checkInt (buf, value, offset, ext, max, min) { if (!internalIsBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance') if (value > max || value < min) throw new RangeError('"value" argument is out of bounds') if (offset + ext > buf.length) throw new RangeError('Index out of range') } Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) { value = +value; offset = offset | 0; byteLength = byteLength | 0; if (!noAssert) { var maxBytes = Math.pow(2, 8 * byteLength) - 1; checkInt(this, value, offset, byteLength, maxBytes, 0); } var mul = 1; var i = 0; this[offset] = value & 0xFF; while (++i < byteLength && (mul *= 0x100)) { this[offset + i] = (value / mul) & 0xFF; } return offset + byteLength }; Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) { value = +value; offset = offset | 0; byteLength = byteLength | 0; if (!noAssert) { var maxBytes = Math.pow(2, 8 * byteLength) - 1; checkInt(this, value, offset, byteLength, maxBytes, 0); } var i = byteLength - 1; var mul = 1; this[offset + i] = value & 0xFF; while (--i >= 0 && (mul *= 0x100)) { this[offset + i] = (value / mul) & 0xFF; } return offset + byteLength }; Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0); if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value); this[offset] = (value & 0xff); return offset + 1 }; function objectWriteUInt16 (buf, value, offset, littleEndian) { if (value < 0) value = 0xffff + value + 1; for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) { buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>> (littleEndian ? i : 1 - i) * 8; } } Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0); if (Buffer.TYPED_ARRAY_SUPPORT) { this[offset] = (value & 0xff); this[offset + 1] = (value >>> 8); } else { objectWriteUInt16(this, value, offset, true); } return offset + 2 }; Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0); if (Buffer.TYPED_ARRAY_SUPPORT) { this[offset] = (value >>> 8); this[offset + 1] = (value & 0xff); } else { objectWriteUInt16(this, value, offset, false); } return offset + 2 }; function objectWriteUInt32 (buf, value, offset, littleEndian) { if (value < 0) value = 0xffffffff + value + 1; for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) { buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff; } } Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0); if (Buffer.TYPED_ARRAY_SUPPORT) { this[offset + 3] = (value >>> 24); this[offset + 2] = (value >>> 16); this[offset + 1] = (value >>> 8); this[offset] = (value & 0xff); } else { objectWriteUInt32(this, value, offset, true); } return offset + 4 }; Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0); if (Buffer.TYPED_ARRAY_SUPPORT) { this[offset] = (value >>> 24); this[offset + 1] = (value >>> 16); this[offset + 2] = (value >>> 8); this[offset + 3] = (value & 0xff); } else { objectWriteUInt32(this, value, offset, false); } return offset + 4 }; Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) { value = +value; offset = offset | 0; if (!noAssert) { var limit = Math.pow(2, 8 * byteLength - 1); checkInt(this, value, offset, byteLength, limit - 1, -limit); } var i = 0; var mul = 1; var sub = 0; this[offset] = value & 0xFF; while (++i < byteLength && (mul *= 0x100)) { if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) { sub = 1; } this[offset + i] = ((value / mul) >> 0) - sub & 0xFF; } return offset + byteLength }; Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) { value = +value; offset = offset | 0; if (!noAssert) { var limit = Math.pow(2, 8 * byteLength - 1); checkInt(this, value, offset, byteLength, limit - 1, -limit); } var i = byteLength - 1; var mul = 1; var sub = 0; this[offset + i] = value & 0xFF; while (--i >= 0 && (mul *= 0x100)) { if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) { sub = 1; } this[offset + i] = ((value / mul) >> 0) - sub & 0xFF; } return offset + byteLength }; Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80); if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value); if (value < 0) value = 0xff + value + 1; this[offset] = (value & 0xff); return offset + 1 }; Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000); if (Buffer.TYPED_ARRAY_SUPPORT) { this[offset] = (value & 0xff); this[offset + 1] = (value >>> 8); } else { objectWriteUInt16(this, value, offset, true); } return offset + 2 }; Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000); if (Buffer.TYPED_ARRAY_SUPPORT) { this[offset] = (value >>> 8); this[offset + 1] = (value & 0xff); } else { objectWriteUInt16(this, value, offset, false); } return offset + 2 }; Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000); if (Buffer.TYPED_ARRAY_SUPPORT) { this[offset] = (value & 0xff); this[offset + 1] = (value >>> 8); this[offset + 2] = (value >>> 16); this[offset + 3] = (value >>> 24); } else { objectWriteUInt32(this, value, offset, true); } return offset + 4 }; Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) { value = +value; offset = offset | 0; if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000); if (value < 0) value = 0xffffffff + value + 1; if (Buffer.TYPED_ARRAY_SUPPORT) { this[offset] = (value >>> 24); this[offset + 1] = (value >>> 16); this[offset + 2] = (value >>> 8); this[offset + 3] = (value & 0xff); } else { objectWriteUInt32(this, value, offset, false); } return offset + 4 }; function checkIEEE754 (buf, value, offset, ext, max, min) { if (offset + ext > buf.length) throw new RangeError('Index out of range') if (offset < 0) throw new RangeError('Index out of range') } function writeFloat (buf, value, offset, littleEndian, noAssert) { if (!noAssert) { checkIEEE754(buf, value, offset, 4); } write(buf, value, offset, littleEndian, 23, 4); return offset + 4 } Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) { return writeFloat(this, value, offset, true, noAssert) }; Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) { return writeFloat(this, value, offset, false, noAssert) }; function writeDouble (buf, value, offset, littleEndian, noAssert) { if (!noAssert) { checkIEEE754(buf, value, offset, 8); } write(buf, value, offset, littleEndian, 52, 8); return offset + 8 } Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) { return writeDouble(this, value, offset, true, noAssert) }; Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) { return writeDouble(this, value, offset, false, noAssert) }; // copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length) Buffer.prototype.copy = function copy (target, targetStart, start, end) { if (!start) start = 0; if (!end && end !== 0) end = this.length; if (targetStart >= target.length) targetStart = target.length; if (!targetStart) targetStart = 0; if (end > 0 && end < start) end = start; // Copy 0 bytes; we're done if (end === start) return 0 if (target.length === 0 || this.length === 0) return 0 // Fatal error conditions if (targetStart < 0) { throw new RangeError('targetStart out of bounds') } if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds') if (end < 0) throw new RangeError('sourceEnd out of bounds') // Are we oob? if (end > this.length) end = this.length; if (target.length - targetStart < end - start) { end = target.length - targetStart + start; } var len = end - start; var i; if (this === target && start < targetStart && targetStart < end) { // descending copy from end for (i = len - 1; i >= 0; --i) { target[i + targetStart] = this[i + start]; } } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) { // ascending copy from start for (i = 0; i < len; ++i) { target[i + targetStart] = this[i + start]; } } else { Uint8Array.prototype.set.call( target, this.subarray(start, start + len), targetStart ); } return len }; // Usage: // buffer.fill(number[, offset[, end]]) // buffer.fill(buffer[, offset[, end]]) // buffer.fill(string[, offset[, end]][, encoding]) Buffer.prototype.fill = function fill (val, start, end, encoding) { // Handle string cases: if (typeof val === 'string') { if (typeof start === 'string') { encoding = start; start = 0; end = this.length; } else if (typeof end === 'string') { encoding = end; end = this.length; } if (val.length === 1) { var code = val.charCodeAt(0); if (code < 256) { val = code; } } if (encoding !== undefined && typeof encoding !== 'string') { throw new TypeError('encoding must be a string') } if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) { throw new TypeError('Unknown encoding: ' + encoding) } } else if (typeof val === 'number') { val = val & 255; } // Invalid ranges are not set to a default, so can range check early. if (start < 0 || this.length < start || this.length < end) { throw new RangeError('Out of range index') } if (end <= start) { return this } start = start >>> 0; end = end === undefined ? this.length : end >>> 0; if (!val) val = 0; var i; if (typeof val === 'number') { for (i = start; i < end; ++i) { this[i] = val; } } else { var bytes = internalIsBuffer(val) ? val : utf8ToBytes(new Buffer(val, encoding).toString()); var len = bytes.length; for (i = 0; i < end - start; ++i) { this[i + start] = bytes[i % len]; } } return this }; // HELPER FUNCTIONS // ================ var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g; function base64clean (str) { // Node strips out invalid characters like \n and \t from the string, base64-js does not str = stringtrim(str).replace(INVALID_BASE64_RE, ''); // Node converts strings with length < 2 to '' if (str.length < 2) return '' // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not while (str.length % 4 !== 0) { str = str + '='; } return str } function stringtrim (str) { if (str.trim) return str.trim() return str.replace(/^\s+|\s+$/g, '') } function toHex (n) { if (n < 16) return '0' + n.toString(16) return n.toString(16) } function utf8ToBytes (string, units) { units = units || Infinity; var codePoint; var length = string.length; var leadSurrogate = null; var bytes = []; for (var i = 0; i < length; ++i) { codePoint = string.charCodeAt(i); // is surrogate component if (codePoint > 0xD7FF && codePoint < 0xE000) { // last char was a lead if (!leadSurrogate) { // no lead yet if (codePoint > 0xDBFF) { // unexpected trail if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD); continue } else if (i + 1 === length) { // unpaired lead if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD); continue } // valid lead leadSurrogate = codePoint; continue } // 2 leads in a row if (codePoint < 0xDC00) { if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD); leadSurrogate = codePoint; continue } // valid surrogate pair codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000; } else if (leadSurrogate) { // valid bmp char, but last char was a lead if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD); } leadSurrogate = null; // encode utf8 if (codePoint < 0x80) { if ((units -= 1) < 0) break bytes.push(codePoint); } else if (codePoint < 0x800) { if ((units -= 2) < 0) break bytes.push( codePoint >> 0x6 | 0xC0, codePoint & 0x3F | 0x80 ); } else if (codePoint < 0x10000) { if ((units -= 3) < 0) break bytes.push( codePoint >> 0xC | 0xE0, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80 ); } else if (codePoint < 0x110000) { if ((units -= 4) < 0) break bytes.push( codePoint >> 0x12 | 0xF0, codePoint >> 0xC & 0x3F | 0x80, codePoint >> 0x6 & 0x3F | 0x80, codePoint & 0x3F | 0x80 ); } else { throw new Error('Invalid code point') } } return bytes } function asciiToBytes (str) { var byteArray = []; for (var i = 0; i < str.length; ++i) { // Node's code seems to be doing this and not & 0x7F.. byteArray.push(str.charCodeAt(i) & 0xFF); } return byteArray } function utf16leToBytes (str, units) { var c, hi, lo; var byteArray = []; for (var i = 0; i < str.length; ++i) { if ((units -= 2) < 0) break c = str.charCodeAt(i); hi = c >> 8; lo = c % 256; byteArray.push(lo); byteArray.push(hi); } return byteArray } function base64ToBytes (str) { return toByteArray(base64clean(str)) } function blitBuffer (src, dst, offset, length) { for (var i = 0; i < length; ++i) { if ((i + offset >= dst.length) || (i >= src.length)) break dst[i + offset] = src[i]; } return i } function isnan (val) { return val !== val // eslint-disable-line no-self-compare } // the following is from is-buffer, also by Feross Aboukhadijeh and with same lisence // The _isBuffer check is for Safari 5-7 support, because it's missing // Object.prototype.constructor. Remove this eventually function isBuffer(obj) { return obj != null && (!!obj._isBuffer || isFastBuffer(obj) || isSlowBuffer(obj)) } function isFastBuffer (obj) { return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj) } // For Node v0.10 support. Remove this eventually. function isSlowBuffer (obj) { return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isFastBuffer(obj.slice(0, 0)) } var padString_1 = createCommonjsModule(function (module, exports) { Object.defineProperty(exports, "__esModule", { value: true }); function padString(input) { var segmentLength = 4; var stringLength = input.length; var diff = stringLength % segmentLength; if (!diff) { return input; } var position = stringLength; var padLength = segmentLength - diff; var paddedStringLength = stringLength + padLength; var buffer = Buffer.alloc(paddedStringLength); buffer.write(input); while (padLength--) { buffer.write("=", position++); } return buffer.toString(); } exports.default = padString; }); unwrapExports(padString_1); var base64url_1 = createCommonjsModule(function (module, exports) { Object.defineProperty(exports, "__esModule", { value: true }); function encode(input, encoding) { if (encoding === void 0) { encoding = "utf8"; } if (isBuffer(input)) { return fromBase64(input.toString("base64")); } return fromBase64(Buffer.from(input, encoding).toString("base64")); } function decode(base64url, encoding) { if (encoding === void 0) { encoding = "utf8"; } return Buffer.from(toBase64(base64url), "base64").toString(encoding); } function toBase64(base64url) { base64url = base64url.toString(); return padString_1.default(base64url) .replace(/\-/g, "+") .replace(/_/g, "/"); } function fromBase64(base64) { return base64 .replace(/=/g, "") .replace(/\+/g, "-") .replace(/\//g, "_"); } function toBuffer(base64url) { return Buffer.from(toBase64(base64url), "base64"); } var base64url = encode; base64url.encode = encode; base64url.decode = decode; base64url.toBase64 = toBase64; base64url.fromBase64 = fromBase64; base64url.toBuffer = toBuffer; exports.default = base64url; }); unwrapExports(base64url_1); var base64url = createCommonjsModule(function (module) { module.exports = base64url_1.default; module.exports.default = module.exports; }); var utils = createCommonjsModule(function (module, exports) { Object.defineProperty(exports, "__esModule", { value: true }); exports.getEncodedMessage = exports.b64encode = exports.b64encodeJSON = exports.getDERfromPEM = exports.str2ab = exports.atob = void 0; var _base64url = _interopRequireDefault(base64url); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } const atob = b64str => new Buffer(b64str, 'base64').toString('binary'); exports.atob = atob; const str2ab = str => { const buf = new ArrayBuffer(str.length); const bufView = new Uint8Array(buf); for (let i = 0, strLen = str.length; i < strLen; i++) { bufView[i] = str.charCodeAt(i); } return buf; }; exports.str2ab = str2ab; const getDERfromPEM = pem => { const pemB64 = pem.trim().split('\n').slice(1, -1) // Remove the --- BEGIN / END PRIVATE KEY --- .join(); return str2ab(atob(pemB64)); }; exports.getDERfromPEM = getDERfromPEM; const b64encodeJSON = obj => _base64url.default.encode(str2ab(JSON.stringify(obj))); exports.b64encodeJSON = b64encodeJSON; const b64encode = _base64url.default.encode; exports.b64encode = b64encode; const getEncodedMessage = (header, payload) => { const encodedHeader = b64encodeJSON(header); const encodedPayload = b64encodeJSON(payload); const encodedMessage = `${encodedHeader}.${encodedPayload}`; return encodedMessage; }; exports.getEncodedMessage = getEncodedMessage; }); unwrapExports(utils); var utils_1 = utils.getEncodedMessage; var utils_2 = utils.b64encode; var utils_3 = utils.b64encodeJSON; var utils_4 = utils.getDERfromPEM; var utils_5 = utils.str2ab; var utils_6 = utils.atob; (function() { /* istanbul ignore next */ if (typeof globalThis === 'object') return; Object.defineProperty(Object.prototype, '__magic__', { get: function() { return this; }, configurable: true, // This makes it possible to `delete` the getter later. }); __magic__.globalThis = __magic__; // lolwat delete Object.prototype.__magic__; })(); var jwt = createCommonjsModule(function (module, exports) { Object.defineProperty(exports, "__esModule", { value: true }); exports.getTokenFromGCPServiceAccount = exports.getToken = exports.getHeader = void 0; const algorithms = { RS256: { name: 'RSASSA-PKCS1-v1_5', hash: { name: 'SHA-256' } } }; const getHeader = (alg, headerAdditions) => ({ ...headerAdditions, alg, typ: 'JWT' }); // XXX https://developers.google.com/identity/protocols/OAuth2ServiceAccount#jwt-auth exports.getHeader = getHeader; const getToken = async ({ privateKeyPEM, payload, alg = 'RS256', cryptoImpl = null, headerAdditions = {} }) => { const algorithm = algorithms[alg]; if (!algorithm) { throw new Error(`@sagi.io/workers-jwt: Unsupported algorithm ${alg}.`); } if (!globalThis.crypto) { if (!cryptoImpl) { throw new Error(`@sagi.io/workers-jwt: No crypto nor cryptoImpl were found.`); } globalThis.crypto = cryptoImpl; } const privateKeyDER = (0, utils.getDERfromPEM)(privateKeyPEM); const privateKey = await crypto.subtle.importKey('pkcs8', privateKeyDER, algorithm, false, ['sign']); const header = getHeader(alg, headerAdditions); const encodedMessage = (0, utils.getEncodedMessage)(header, payload); const encodedMessageArrBuf = (0, utils.str2ab)(encodedMessage); const signatureArrBuf = await crypto.subtle.sign(algorithms.RS256.name, privateKey, encodedMessageArrBuf); const encodedSignature = (0, utils.b64encode)(signatureArrBuf); const token = `${encodedMessage}.${encodedSignature}`; return token; }; // Service Account Authoriazation without OAuth2: // https://developers.google.com/identity/protocols/OAuth2ServiceAccount#jwt-auth // Service Account Auth for OAuth2 Tokens: Choose "HTTP / REST" for: // https://developers.google.com/identity/protocols/OAuth2ServiceAccount exports.getToken = getToken; const getTokenFromGCPServiceAccount = async ({ serviceAccountJSON, aud, alg = 'RS256', cryptoImpl = null, expiredAfter = 3600, headerAdditions = {}, payloadAdditions = {} }) => { const { client_email: clientEmail, private_key_id: privateKeyId, private_key: privateKeyPEM } = serviceAccountJSON; Object.assign(headerAdditions, { kid: privateKeyId }); const iat = parseInt(Date.now() / 1000); const exp = iat + expiredAfter; const iss = clientEmail; const sub = clientEmail; const payload = { aud, iss, sub, iat, exp, ...payloadAdditions }; return getToken({ privateKeyPEM, payload, alg, headerAdditions, cryptoImpl }); }; exports.getTokenFromGCPServiceAccount = getTokenFromGCPServiceAccount; }); unwrapExports(jwt); var jwt_1 = jwt.getTokenFromGCPServiceAccount; var jwt_2 = jwt.getToken; var jwt_3 = jwt.getHeader; const { getToken, getTokenFromGCPServiceAccount } = jwt; var workersJwt = { getToken, getTokenFromGCPServiceAccount }; var workersJwt_2 = workersJwt.getTokenFromGCPServiceAccount; class GoogleDrive { constructor(auth) { this.auth = auth; this.expires = 0; this._getIdCache = new Map(); } async initializeClient() { // any method that do api call must call this beforehand if (Date.now() < this.expires) return; if (this.auth.service_account && typeof this.auth.service_account_json != 'undefined') { const aud = this.auth.service_account_json.token_uri; const serviceAccountJSON = this.auth.service_account_json; const jwttoken = await workersJwt_2({ serviceAccountJSON, aud, payloadAdditions: { scope: 'https://www.googleapis.com/auth/drive' } }); const resp = await xf.post(serviceAccountJSON.token_uri, { urlencoded: { grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer', assertion: jwttoken } }).json(); this.client = xf.extend({ baseURI: 'https://www.googleapis.com/drive/v3/', headers: { Authorization: `Bearer ${resp.access_token}` } }); } else { const resp = await xf.post('https://www.googleapis.com/oauth2/v4/token', { urlencoded: { client_id: this.auth.client_id, client_secret: this.auth.client_secret, refresh_token: this.auth.refresh_token, grant_type: 'refresh_token' } }).json(); this.client = xf.extend({ baseURI: 'https://www.googleapis.com/drive/v3/', headers: { Authorization: `Bearer ${resp.access_token}` } }); } this.expires = Date.now() + 3500 * 1000; // normally, it should expiers after 3600 seconds } async listDrive() { await this.initializeClient(); return this.client.get('drives').json(); } async download(id, range = '') { await this.initializeClient(); return this.client.get(`files/${id}`, { qs: { includeItemsFromAllDrives: true, supportsAllDrives: true, alt: 'media' }, headers: { Range: range } }); } async downloadByPath(path, rootId = 'root', range = '') { const id = await this.getId(path, rootId); if (!id) return null; return this.download(id, range); } async getMeta(id) { await this.initializeClient(); return this.client.get(`files/${id}`, { qs: { includeItemsFromAllDrives: true, supportsAllDrives: true, fields: '*' } }).json(); } async getMetaByPath(path, rootId = 'root') { const id = await this.getId(path, rootId); if (!id) return null; return this.getMeta(id); } async listFolder(id) { await this.initializeClient(); const getList = pageToken => { const qs = { includeItemsFromAllDrives: true, supportsAllDrives: true, q: `'${id}' in parents and trashed = false`, orderBy: 'folder,name,modifiedTime desc', fields: 'files(id,name,mimeType,size,modifiedTime),nextPageToken', pageSize: 1000 }; if (pageToken) { qs.pageToken = pageToken; } return this.client.get('files', { qs }).json(); }; const files = []; let pageToken; do { const resp = await getList(pageToken); files.push(...resp.files); pageToken = resp.nextPageToken; } while (pageToken); return { files }; } async listFolderByPath(path, rootId = 'root') { const id = await this.getId(path, rootId); if (!id) return null; return this.listFolder(id); } async getId(path, rootId = 'root') { const toks = path.split('/').filter(Boolean); let id = rootId; for (const tok of toks) { id = await this._getId(id, tok); } return id; } async _getId(parentId, childName) { if (this._getIdCache.has(parentId + childName)) { return this._getIdCache.get(parentId + childName); } await this.initializeClient(); childName = childName.replace(/\'/g, `\\'`); // escape single quote const resp = await this.client.get('files', { qs: { includeItemsFromAllDrives: true, supportsAllDrives: true, q: `'${parentId}' in parents and name = '${childName}' and trashed = false`, fields: 'files(id)' } }).json().catch(e => ({ files: [] })); // if error, make it empty if (resp.files.length === 0) { return null; } this._getIdCache.has(parentId + childName); return resp.files[0].id; // when there are more than 1 items, simply return the first one } async upload(parentId, name, file) { await this.initializeClient(); const createResp = await this.client.post('https://www.googleapis.com/upload/drive/v3/files', { qs: { uploadType: 'resumable', supportsAllDrives: true }, json: { name, parents: [parentId] } }); const putUrl = createResp.headers.get('Location'); return this.client.put(putUrl, { body: file }).json(); } async uploadByPath(path, name, file, rootId = 'root') { const id = await this.getId(path, rootId); if (!id) return null; return this.upload(id, name, file); } async delete(fileId) { return this.client.delete(`files/${fileId}`); } async deleteByPath(path, rootId = 'root') { const id = await this.getId(path, rootId); if (!id) return null; return this.delete(id); } } const gd = new GoogleDrive(self.props); const HTML = `${self.props.title}