binconv/dist/src/blobToReadableStream.js

Binary converters for Blob, Uint8Array, ReadableStream, ArrayBuffer, string in JavaScript/TypeScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var BlobStreamController = (function () {
    function BlobStreamController(blob, size) {
        this.blob = blob;
        this.index = 0;
        this.chunkSize = size || 1024 * 64;
    }
    BlobStreamController.prototype.pull = function (controller) {
        var _this = this;
        return new Promise(function (resolve, reject) {
            var bytesLeft = _this.blob.size - _this.index;
            if (bytesLeft <= 0) {
                controller.close();
                return resolve();
            }
            var size = Math.min(_this.chunkSize, bytesLeft);
            var slice = _this.blob.slice(_this.index, _this.index + size);
            var reader = new FileReader();
            reader.onload = function () {
                controller.enqueue(new Uint8Array(reader.result));
                resolve();
            };
            reader.onerror = reject;
            reader.readAsArrayBuffer(slice);
            _this.index += size;
        });
    };
    return BlobStreamController;
}());
function blobToReadableStream(blob, size) {
    return new ReadableStream(new BlobStreamController(blob, size));
}
exports.blobToReadableStream = blobToReadableStream;
exports.default = blobToReadableStream;
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