azurite/dist/src/common/ZeroBytesStream.js

An open source Azure Storage API compatible server

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const stream_1 = require("stream");
const zeroBytesRangeUnit = 512;
const zeroBytesChunk = Buffer.alloc(zeroBytesRangeUnit);
class ZeroBytesStream extends stream_1.Readable {
    constructor(length, options) {
        super(options);
        this.length = length;
        this.leftBytes = length;
    }
    _read(size) {
        if (this.leftBytes === 0) {
            this.push(null);
        }
        else if (this.leftBytes >= zeroBytesRangeUnit) {
            this.leftBytes -= zeroBytesRangeUnit;
            this.push(zeroBytesChunk);
        }
        else {
            process.nextTick(() => {
                this.push(Buffer.alloc(this.leftBytes));
                this.leftBytes = 0;
            });
        }
    }
}
exports.default = ZeroBytesStream;
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