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Add Blob.arrayBuffer and Blob.text methods #7

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Add Blob.arrayBuffer and Blob.text methods #7

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4ec2946
Updated dropped dependencies, allowing npm install to function.
coreybutler Nov 27, 2020
37f9ccc
Added missing Blob.arrayBuffer and Blob.text methods to be more compl…
coreybutler Nov 27, 2020
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12 changes: 6 additions & 6 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -40,10 +40,10 @@
"babel-plugin-istanbul": "^4.1.5",
"babel-preset-env": "^1.6.1",
"babel-register": "^6.16.3",
"chai": "^3.5.0",
"chai": "^4.2.0",
"chai-as-promised": "^7.1.1",
"chai-iterator": "^1.1.1",
"chai-string": "^1.3.0",
"chai-iterator": "^3.0.2",
"chai-string": "^1.5.0",
"codecov": "^3.0.0",
"cross-env": "^5.1.3",
"form-data": "^2.3.1",
Expand All @@ -61,10 +61,10 @@
},
"dependencies": {
"@mattiasbuelens/web-streams-polyfill": "^0.3.2",
"busboy": "^0.3.0",
"formdata-node": "^1.5.1"
"busboy": "^0.3.1",
"formdata-node": "^2.4.0"
},
"peerDependencies": {
"form-data": ">= 2.1.0"
"form-data": ">=3.0.0"
}
}
42 changes: 16 additions & 26 deletions src/blob.js
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Original file line number Diff line number Diff line change
@@ -1,8 +1,10 @@
// Based on https://github.com/tmpvar/jsdom/blob/aa85b2abf07766ff7bf5c1f6daafb3726f2f2db5/lib/jsdom/living/blob.js
// (MIT licensed)
import { TextDecoder } from 'util'

export const BUFFER = Symbol('buffer');
const TYPE = Symbol('type');
const decoder = new TextDecoder('utf-8')

export default class Blob {
constructor() {
Expand Down Expand Up @@ -41,43 +43,31 @@ export default class Blob {
this[TYPE] = type;
}
}
get size() {
get size () {
return this[BUFFER].length;
}
get type() {
get type () {
return this[TYPE];
}
slice() {
arrayBuffer (start = 0, end) {
const size = this.size;

const start = arguments[0];
const end = arguments[1];
let relativeStart, relativeEnd;
if (start === undefined) {
relativeStart = 0;
} else if (start < 0) {
relativeStart = Math.max(size + start, 0);
} else {
relativeStart = Math.min(start, size);
}
if (end === undefined) {
relativeEnd = size;
} else if (end < 0) {
relativeEnd = Math.max(size + end, 0);
} else {
relativeEnd = Math.min(end, size);
}
const span = Math.max(relativeEnd - relativeStart, 0);
start = start < 0 ? Math.max(size + start, 0) : (start !== 0 ? Math.min(start, size) : start)
end = !end ? size : (size < 0 ? Math.max(size + end, 0) : Math.min(end, size))

const buffer = this[BUFFER];
const slicedBuffer = buffer.slice(
relativeStart,
relativeStart + span
);
const span = Math.max(end - start)
const buffer = this[BUFFER]
return buffer.slice(start, start + span)
}
slice () {
const slicedBuffer = this.arrayBuffer(...arguments)
const blob = new Blob([], { type: arguments[2] });
blob[BUFFER] = slicedBuffer;
return blob;
}
text () {
return decoder.decode(this[BUFFER]).toString()
}
}

Object.defineProperties(Blob.prototype, {
Expand Down