node-web-mvc/dist/servlets/util/Bytes.js

node spring mvc

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * @module BytesConverter
 * @description 字节单位转换
 */
const unitValues = {
    b: 1,
    kb: 1024,
    mb: Math.pow(1024, 2),
    gb: Math.pow(1024, 3),
    tb: Math.pow(1024, 4),
    pb: Math.pow(1024, 5),
};
class Bytes {
    constructor(input, defaultValue) {
        input = (input === '' || input === null || input === undefined) ? defaultValue : input;
        if (typeof input == 'number') {
            this.bytes = input;
        }
        else if (typeof input === 'string') {
            this.bytes = this.parse(input);
        }
    }
    parse(input) {
        const values = /^((-|\+)?(\d+(?:\.\d+)?)) *(kb|mb|gb|tb|pb)$/i.exec(input) || [];
        const unit = (values[4] || '').toLowerCase();
        const value = parseFloat(values[1]);
        if (value > 0) {
            return unitValues[unit] * value;
        }
        return 0;
    }
}
exports.default = Bytes;