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Merge pull request #67 from jimmywarting/master

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Compatibility overhaul
This commit is contained in:
Eli Grey
2019-04-25 20:42:16 -07:00
committed by GitHub
parent 20316adffb ecf7fe0eb4
commit b4f086d8dc
1 changed files with 414 additions and 185 deletions
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Blob.js
+414 -185
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@@ -1,6 +1,6 @@
/* Blob.js
* A Blob, File, FileReader & URL implementation.
* 2018-08-09
* 2019-04-19
*
* By Eli Grey, http://eligrey.com
* By Jimmy Wärting, https://github.com/jimmywarting
@@ -8,8 +8,7 @@
* See https://github.com/eligrey/Blob.js/blob/master/LICENSE.md
*/
;(function(){
;(function () {
var global = typeof window === 'object'
? window : typeof self === 'object'
? self : this
@@ -17,9 +16,9 @@
var BlobBuilder = global.BlobBuilder
|| global.WebKitBlobBuilder
|| global.MSBlobBuilder
|| global.MozBlobBuilder;
|| global.MozBlobBuilder
global.URL = global.URL || global.webkitURL || function(href, a) {
global.URL = global.URL || global.webkitURL || function (href, a) {
a = document.createElement('a')
a.href = href
return a
@@ -34,7 +33,7 @@
var arrayBufferSupported = !!global.ArrayBuffer
var blobBuilderSupported = BlobBuilder
&& BlobBuilder.prototype.append
&& BlobBuilder.prototype.getBlob;
&& BlobBuilder.prototype.getBlob
try {
// Check if Blob constructor is supported
@@ -42,168 +41,266 @@
// Check if Blob constructor supports ArrayBufferViews
// Fails in Safari 6, so we need to map to ArrayBuffers there.
blobSupportsArrayBufferView = new Blob([new Uint8Array([1,2])]).size === 2
} catch(e) {}
blobSupportsArrayBufferView = new Blob([new Uint8Array([1, 2])]).size === 2
} catch (e) {}
/**
* Helper function that maps ArrayBufferViews to ArrayBuffers
* Used by BlobBuilder constructor and old browsers that didn't
* support it in the Blob constructor.
*/
function mapArrayBufferViews(ary) {
return ary.map(function(chunk) {
function mapArrayBufferViews (ary) {
return ary.map(function (chunk) {
if (chunk.buffer instanceof ArrayBuffer) {
var buf = chunk.buffer;
var buf = chunk.buffer
// if this is a subarray, make a copy so we only
// include the subarray region from the underlying buffer
if (chunk.byteLength !== buf.byteLength) {
var copy = new Uint8Array(chunk.byteLength);
copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
buf = copy.buffer;
var copy = new Uint8Array(chunk.byteLength)
copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength))
buf = copy.buffer
}
return buf;
return buf
}
return chunk;
});
return chunk
})
}
function BlobBuilderConstructor(ary, options) {
options = options || {};
function BlobBuilderConstructor (ary, options) {
options = options || {}
var bb = new BlobBuilder();
mapArrayBufferViews(ary).forEach(function(part) {
bb.append(part);
});
var bb = new BlobBuilder()
mapArrayBufferViews(ary).forEach(function (part) {
bb.append(part)
})
return options.type ? bb.getBlob(options.type) : bb.getBlob();
};
return options.type ? bb.getBlob(options.type) : bb.getBlob()
}
function BlobConstructor(ary, options) {
return new origBlob(mapArrayBufferViews(ary), options || {});
};
function BlobConstructor (ary, options) {
return new origBlob(mapArrayBufferViews(ary), options || {})
}
if (global.Blob) {
BlobBuilderConstructor.prototype = Blob.prototype;
BlobConstructor.prototype = Blob.prototype;
BlobBuilderConstructor.prototype = Blob.prototype
BlobConstructor.prototype = Blob.prototype
}
function FakeBlobBuilder() {
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));
/********************************************************/
/* String Encoder fallback */
/********************************************************/
function stringEncode (string) {
var pos = 0
var len = string.length
var out = []
var Arr = global.Uint8Array || Array // Use byte array when possible
var at = 0 // output position
var tlen = Math.max(32, len + (len >> 1) + 7) // 1.5x size
var target = new Arr((tlen >> 3) << 3) // ... but at 8 byte offset
while (pos < len) {
var value = string.charCodeAt(pos++)
if (value >= 0xd800 && value <= 0xdbff) {
// high surrogate
if (pos < len) {
var extra = string.charCodeAt(pos)
if ((extra & 0xfc00) === 0xdc00) {
++pos
value = ((value & 0x3ff) << 10) + (extra & 0x3ff) + 0x10000
}
}
else if (charcode < 0xd800 || charcode >= 0xe000) {
utf8.push(0xe0 | (charcode >> 12),
0x80 | ((charcode>>6) & 0x3f),
0x80 | (charcode & 0x3f));
}
// surrogate pair
else {
i++;
// UTF-16 encodes 0x10000-0x10FFFF by
// subtracting 0x10000 and splitting the
// 20 bits of 0x0-0xFFFFF into two halves
charcode = 0x10000 + (((charcode & 0x3ff)<<10)
| (str.charCodeAt(i) & 0x3ff));
utf8.push(0xf0 | (charcode >>18),
0x80 | ((charcode>>12) & 0x3f),
0x80 | ((charcode>>6) & 0x3f),
0x80 | (charcode & 0x3f));
if (value >= 0xd800 && value <= 0xdbff) {
continue // drop lone surrogate
}
}
return utf8;
// expand the buffer if we couldn't write 4 bytes
if (at + 4 > target.length) {
tlen += 8 // minimum extra
tlen *= (1.0 + (pos / string.length) * 2) // take 2x the remaining
tlen = (tlen >> 3) << 3 // 8 byte offset
const update = new Uint8Array(tlen)
update.set(target)
target = update
}
if ((value & 0xffffff80) === 0) { // 1-byte
target[at++] = value // ASCII
continue
} else if ((value & 0xfffff800) === 0) { // 2-byte
target[at++] = ((value >> 6) & 0x1f) | 0xc0
} else if ((value & 0xffff0000) === 0) { // 3-byte
target[at++] = ((value >> 12) & 0x0f) | 0xe0
target[at++] = ((value >> 6) & 0x3f) | 0x80
} else if ((value & 0xffe00000) === 0) { // 4-byte
target[at++] = ((value >> 18) & 0x07) | 0xf0
target[at++] = ((value >> 12) & 0x3f) | 0x80
target[at++] = ((value >> 6) & 0x3f) | 0x80
} else {
// FIXME: do we care
continue
}
target[at++] = (value & 0x3f) | 0x80
}
function fromUtf8Array(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 target.slice(0, at)
}
/********************************************************/
/* String Decoder fallback */
/********************************************************/
function stringDecode (buf) {
var end = buf.length
var res = []
var i = 0
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
}
}
}
}
return out;
}
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
}
function isDataView(obj) {
var len = res.length
var str = ''
var i = 0
while (i < len) {
str += String.fromCharCode.apply(String, res.slice(i, i += 0x1000))
}
return str
}
// string -> buffer
var textEncode = typeof TextEncoder === 'function'
? TextEncoder.prototype.encode.bind(new TextEncoder())
: stringEncode
// buffer -> string
var textDecode = typeof TextDecoder === 'function'
? TextDecoder.prototype.decode.bind(new TextDecoder())
: stringDecode
function FakeBlobBuilder () {
function isDataView (obj) {
return obj && DataView.prototype.isPrototypeOf(obj)
}
function bufferClone(buf) {
function bufferClone (buf) {
var view = new Array(buf.byteLength)
var array = new Uint8Array(buf)
var i = view.length
while(i--) {
while (i--) {
view[i] = array[i]
}
return view
}
function encodeByteArray(input) {
var byteToCharMap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
function array2base64 (input) {
var byteToCharMap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
var output = [];
var output = []
for (var i = 0; i < input.length; i += 3) {
var byte1 = input[i];
var haveByte2 = i + 1 < input.length;
var byte2 = haveByte2 ? input[i + 1] : 0;
var haveByte3 = i + 2 < input.length;
var byte3 = haveByte3 ? input[i + 2] : 0;
var byte1 = input[i]
var haveByte2 = i + 1 < input.length
var byte2 = haveByte2 ? input[i + 1] : 0
var haveByte3 = i + 2 < input.length
var byte3 = haveByte3 ? input[i + 2] : 0
var outByte1 = byte1 >> 2;
var outByte2 = ((byte1 & 0x03) << 4) | (byte2 >> 4);
var outByte3 = ((byte2 & 0x0F) << 2) | (byte3 >> 6);
var outByte4 = byte3 & 0x3F;
var outByte1 = byte1 >> 2
var outByte2 = ((byte1 & 0x03) << 4) | (byte2 >> 4)
var outByte3 = ((byte2 & 0x0F) << 2) | (byte3 >> 6)
var outByte4 = byte3 & 0x3F
if (!haveByte3) {
outByte4 = 64;
outByte4 = 64
if (!haveByte2) {
outByte3 = 64;
outByte3 = 64
}
}
output.push(
byteToCharMap[outByte1], byteToCharMap[outByte2],
byteToCharMap[outByte3], byteToCharMap[outByte4])
byteToCharMap[outByte1], byteToCharMap[outByte2],
byteToCharMap[outByte3], byteToCharMap[outByte4]
)
}
return output.join('')
}
var create = Object.create || function (a) {
function c() {}
c.prototype = a;
return new c
function c () {}
c.prototype = a
return new c()
}
if (arrayBufferSupported) {
var viewClasses = [
'[object Int8Array]',
@@ -217,86 +314,114 @@
'[object Float64Array]'
]
var isArrayBufferView = ArrayBuffer.isView || function(obj) {
var isArrayBufferView = ArrayBuffer.isView || function (obj) {
return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1
}
}
function concatTypedarrays (chunks) {
var size = 0
var i = chunks.length
while (i--) { size += chunks[i].length }
var b = new Uint8Array(size)
var offset = 0
for (i = 0, l = chunks.length; i < l; i++) {
var chunk = chunks[i]
b.set(chunk, offset)
offset += chunk.byteLength || chunk.length
}
return b
}
/********************************************************/
/* Blob constructor */
/********************************************************/
function Blob(chunks, opts) {
function Blob (chunks, opts) {
chunks = chunks || []
opts = opts == null ? {} : opts
for (var i = 0, len = chunks.length; i < len; i++) {
var chunk = chunks[i]
if (chunk instanceof Blob) {
chunks[i] = chunk._buffer
} else if (typeof chunk === 'string') {
chunks[i] = toUTF8Array(chunk)
chunks[i] = textEncode(chunk)
} else if (arrayBufferSupported && (ArrayBuffer.prototype.isPrototypeOf(chunk) || isArrayBufferView(chunk))) {
chunks[i] = bufferClone(chunk)
} else if (arrayBufferSupported && isDataView(chunk)) {
chunks[i] = bufferClone(chunk.buffer)
} else {
chunks[i] = toUTF8Array(String(chunk))
chunks[i] = textEncode(String(chunk))
}
}
this._buffer = [].concat.apply([], chunks)
this._buffer = global.Uint8Array
? concatTypedarrays(chunks)
: [].concat.apply([], chunks)
this.size = this._buffer.length
this.type = opts ? opts.type || '' : ''
this.type = opts.type || ''
if (/[^\u0020-\u007E]/.test(this.type)) {
this.type = ''
} else {
this.type = this.type.toLowerCase()
}
}
Blob.prototype.slice = function(start, end, type) {
Blob.prototype.arrayBuffer = function () {
return Promise.resolve(this._buffer)
}
Blob.prototype.text = function () {
return Promise.resolve(textDecode(this._buffer))
}
Blob.prototype.slice = function (start, end, type) {
var slice = this._buffer.slice(start || 0, end || this._buffer.length)
return new Blob([slice], {type: type})
}
Blob.prototype.toString = function() {
Blob.prototype.toString = function () {
return '[object Blob]'
}
/********************************************************/
/* File constructor */
/********************************************************/
function File(chunks, name, opts) {
function File (chunks, name, opts) {
opts = opts || {}
var a = Blob.call(this, chunks, opts) || this
a.name = name
a.lastModifiedDate = opts.lastModified ? new Date(opts.lastModified) : new Date
a.name = name.replace(/\//g, ':')
a.lastModifiedDate = opts.lastModified ? new Date(opts.lastModified) : new Date()
a.lastModified = +a.lastModifiedDate
return a
}
File.prototype = create(Blob.prototype);
File.prototype.constructor = File;
File.prototype = create(Blob.prototype)
File.prototype.constructor = File
if (Object.setPrototypeOf)
Object.setPrototypeOf(File, Blob);
else {
try {File.__proto__ = Blob} catch (e) {}
if (Object.setPrototypeOf) {
Object.setPrototypeOf(File, Blob)
} else {
try { File.__proto__ = Blob } catch (e) {}
}
File.prototype.toString = function() {
File.prototype.toString = function () {
return '[object File]'
}
/********************************************************/
/* FileReader constructor */
/********************************************************/
function FileReader() {
if (!(this instanceof FileReader))
throw new TypeError("Failed to construct 'FileReader': Please use the 'new' operator, this DOM object constructor cannot be called as a function.")
function FileReader () {
if (!(this instanceof FileReader)) {
throw new TypeError("Failed to construct 'FileReader': Please use the 'new' operator, this DOM object constructor cannot be called as a function.")
}
var delegate = document.createDocumentFragment()
this.addEventListener = delegate.addEventListener
this.dispatchEvent = function(evt) {
this.dispatchEvent = function (evt) {
var local = this['on' + evt.type]
if (typeof local === 'function') local(evt)
delegate.dispatchEvent(evt)
@@ -304,13 +429,14 @@
this.removeEventListener = delegate.removeEventListener
}
function _read(fr, blob, kind) {
if (!(blob instanceof Blob))
throw new TypeError("Failed to execute '" + kind + "' on 'FileReader': parameter 1 is not of type 'Blob'.")
function _read (fr, blob, kind) {
if (!(blob instanceof Blob)) {
throw new TypeError("Failed to execute '" + kind + "' on 'FileReader': parameter 1 is not of type 'Blob'.")
}
fr.result = ''
setTimeout(function(){
setTimeout(function () {
this.readyState = FileReader.LOADING
fr.dispatchEvent(new Event('load'))
fr.dispatchEvent(new Event('loadend'))
@@ -328,34 +454,34 @@
FileReader.prototype.onloadstart = null
FileReader.prototype.onprogress = null
FileReader.prototype.readAsDataURL = function(blob) {
FileReader.prototype.readAsDataURL = function (blob) {
_read(this, blob, 'readAsDataURL')
this.result = 'data:' + blob.type + ';base64,' + encodeByteArray(blob._buffer)
this.result = 'data:' + blob.type + ';base64,' + array2base64(blob._buffer)
}
FileReader.prototype.readAsText = function(blob) {
FileReader.prototype.readAsText = function (blob) {
_read(this, blob, 'readAsText')
this.result = fromUtf8Array(blob._buffer)
this.result = textDecode(blob._buffer)
}
FileReader.prototype.readAsArrayBuffer = function(blob) {
_read(this, blob, 'readAsText')
this.result = blob._buffer.slice()
FileReader.prototype.readAsArrayBuffer = function (blob) {
_read(this, blob, 'readAsText')
// return ArrayBuffer when possible
this.result = (blob._buffer.buffer || blob._buffer).slice()
}
FileReader.prototype.abort = function() {}
FileReader.prototype.abort = function () {}
/********************************************************/
/* URL */
/********************************************************/
URL.createObjectURL = function(blob) {
return blob instanceof Blob
? 'data:' + blob.type + ';base64,' + encodeByteArray(blob._buffer)
URL.createObjectURL = function (blob) {
return blob instanceof Blob
? 'data:' + blob.type + ';base64,' + array2base64(blob._buffer)
: createObjectURL.call(URL, blob)
}
URL.revokeObjectURL = function(url) {
URL.revokeObjectURL = function (url) {
revokeObjectURL && revokeObjectURL.call(URL, url)
}
@@ -364,39 +490,33 @@
/********************************************************/
var _send = global.XMLHttpRequest && global.XMLHttpRequest.prototype.send
if (_send) {
XMLHttpRequest.prototype.send = function(data) {
XMLHttpRequest.prototype.send = function (data) {
if (data instanceof Blob) {
this.setRequestHeader('Content-Type', data.type)
_send.call(this, fromUtf8Array(data._buffer))
_send.call(this, textDecode(data._buffer))
} else {
_send.call(this, data)
}
}
}
global.FileReader = FileReader
global.File = File
global.Blob = Blob
}
if (strTag) {
File.prototype[strTag] = 'File'
Blob.prototype[strTag] = 'Blob'
FileReader.prototype[strTag] = 'FileReader'
}
function fixFileAndXHR() {
function fixFileAndXHR () {
var isIE = !!global.ActiveXObject || (
'-ms-scroll-limit' in document.documentElement.style &&
'-ms-scroll-limit' in document.documentElement.style &&
'-ms-ime-align' in document.documentElement.style
)
// Monkey patched
// Monkey patched
// IE don't set Content-Type header on XHR whose body is a typed Blob
// https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/6047383
var _send = global.XMLHttpRequest && global.XMLHttpRequest.prototype.send
if (isIE && _send) {
XMLHttpRequest.prototype.send = function(data) {
XMLHttpRequest.prototype.send = function (data) {
if (data instanceof Blob) {
this.setRequestHeader('Content-Type', data.type)
_send.call(this, data)
@@ -408,34 +528,35 @@
try {
new File([], '')
} catch(e) {
} catch (e) {
try {
var klass = new Function('class File extends Blob {' +
var klass = new Function('class File extends Blob {' +
'constructor(chunks, name, opts) {' +
'opts = opts || {};' +
'super(chunks, opts || {});' +
'this.name = name;' +
'this.lastModifiedDate = opts.lastModified ? new Date(opts.lastModified) : new Date;' +
'this.name = name.replace(/\//g, ":");' +
'this.lastModifiedDate = opts.lastModified ? new Date(opts.lastModified) : new Date();' +
'this.lastModified = +this.lastModifiedDate;' +
'}};' +
'return new File([], ""), File'
)()
global.File = klass
} catch(e) {
var klass = function(b, d, c) {
} catch (e) {
var klass = function (b, d, c) {
var blob = new Blob(b, c)
var t = c && void 0 !== c.lastModified ? new Date(c.lastModified) : new Date
blob.name = d
var t = c && void 0 !== c.lastModified ? new Date(c.lastModified) : new Date()
blob.name = d.replace(/\//g, ':')
blob.lastModifiedDate = t
blob.lastModified = +t
blob.toString = function() {
blob.toString = function () {
return '[object File]'
}
if (strTag)
if (strTag) {
blob[strTag] = 'File'
}
return blob
}
global.File = klass
@@ -448,9 +569,117 @@
global.Blob = blobSupportsArrayBufferView ? global.Blob : BlobConstructor
} else if (blobBuilderSupported) {
fixFileAndXHR()
global.Blob = BlobBuilderConstructor;
global.Blob = BlobBuilderConstructor
} else {
FakeBlobBuilder()
}
})();
if (strTag) {
File.prototype[strTag] = 'File'
Blob.prototype[strTag] = 'Blob'
FileReader.prototype[strTag] = 'FileReader'
}
var blob = global.Blob.prototype
var stream
function promisify(obj) {
return new Promise(function(resolve, reject) {
obj.onload =
obj.onerror = function(evt) {
obj.onload =
obj.onerror = null
evt.type === 'load'
? resolve(obj.result || obj)
: reject(new Error('Failed to read the blob/file'))
}
})
}
try {
new ReadableStream({ type: 'bytes' })
stream = function stream() {
var position = 0
var blob = this
return new ReadableStream({
type: 'bytes',
autoAllocateChunkSize: 524288,
pull: function (controller) {
var v = controller.byobRequest.view
var chunk = blob.slice(position, position + v.byteLength)
return chunk.arrayBuffer()
.then(function (buffer) {
var uint8array = new Uint8Array(buffer)
var bytesRead = uint8array.byteLength
position += bytesRead
v.set(uint8array)
controller.byobRequest.respond(bytesRead)
if(position >= blob.size)
controller.close()
})
}
})
}
} catch (e) {
try {
new ReadableStream({})
stream = function stream(blob){
var position = 0
var blob = this
return new ReadableStream({
pull: function (controller) {
var chunk = blob.slice(position, position + 524288)
return chunk.arrayBuffer().then(function (buffer) {
position += buffer.byteLength
var uint8array = new Uint8Array(buffer)
controller.enqueue(uint8array)
if (position == blob.size)
controller.close()
})
}
})
}
} catch (e) {
try {
new Response('').body.getReader().read()
stream = function stream() {
return (new Response(this)).body
}
} catch (e) {
stream = function stream() {
throw new Error('Include https://github.com/MattiasBuelens/web-streams-polyfill')
}
}
}
}
if (!blob.arrayBuffer) {
blob.arrayBuffer = function arrayBuffer() {
var fr = new FileReader()
fr.readAsArrayBuffer(this)
return promisify(fr)
}
}
if (!blob.text) {
blob.text = function text() {
var fr = new FileReader()
fr.readAsText(this)
return promisify(fr)
}
}
if (!blob.stream) {
blob.stream = stream
}
})()