node-web-mvc/dist/servlets/http/MediaFactory/index.js

node spring mvc

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * @module MediaTypeFactory
 * @description 媒体类型工厂
 */
const path_1 = __importDefault(require("path"));
const fs_1 = __importDefault(require("fs"));
const MediaType_1 = __importDefault(require("../MediaType"));
const file = path_1.default.join(__dirname, '../../../../mime.type');
const runtime = {
    mimeTypes: null,
};
class MediaTypeFactory {
    /**
     * 加载所有MIME类型
     */
    static load() {
        const content = fs_1.default.readFileSync(file).toString('utf-8');
        const lines = content.split('\n');
        const mediaTypes = {};
        lines.forEach((line) => {
            if (line[0] !== '#') {
                const segments = line.split('\t');
                const mediaType = segments.shift();
                const exts = (segments.find((s) => !!s) || '').split(' ').filter((s) => !!s);
                exts.forEach((ext) => {
                    mediaTypes['.' + ext] = new MediaType_1.default(mediaType);
                });
            }
        });
        return mediaTypes;
    }
    /**
     * 当前支持的所有MIME类型
     */
    static get mimeTypes() {
        if (!runtime.mimeTypes) {
            runtime.mimeTypes = this.load();
        }
        return runtime.mimeTypes;
    }
    /**
     * 获取指定文件的媒体类型
     * @param filename
     */
    static getMediaType(filename) {
        if (!filename) {
            return null;
        }
        const ext = path_1.default.extname(filename).toLowerCase();
        return this.mimeTypes[ext];
    }
}
exports.default = MediaTypeFactory;