@zerooneit/expressive-tea
Version:
A REST API over Express and Typescript
71 lines (70 loc) • 3.28 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ProxyProperty = exports.ProxyOption = exports.ProxyContainer = void 0;
const MetaData_1 = require("../classes/MetaData");
const httpProxy = require("express-http-proxy");
const object_helper_1 = require("../helpers/object-helper");
const lodash_1 = require("lodash");
const RequestExceptions_1 = require("../exceptions/RequestExceptions");
const constants_1 = require("../libs/constants");
const NON_ASYNC_METHODS = ['host'];
function ProxyContainer(source, targetUrl) {
return (ProxyContainerClass) => {
class ExpressiveTeaProxy extends ProxyContainerClass {
constructor(...args) {
super(...args);
this.source = source;
this.target = targetUrl;
const options = {};
const host = MetaData_1.default.get(constants_1.PROXY_SETTING_KEY, this, constants_1.PROXY_METHODS.HOST);
for (const value of Object.values(constants_1.PROXY_METHODS)) {
if (value !== constants_1.PROXY_METHODS.HOST) {
options[value] = MetaData_1.default.get(constants_1.PROXY_SETTING_KEY, this, value);
}
}
for (const value of Object.values(constants_1.PROXY_PROPERTIES)) {
const key = MetaData_1.default.get(constants_1.PROXY_SETTING_KEY, this, value);
if (!(0, lodash_1.isUndefined)(key)) {
// @ts-ignore:next-line
options[value] = this[key];
}
}
this.proxyHandler = httpProxy(host ? host.value.bind(this) : this.target);
}
__register(server) {
const proxyMetadata = MetaData_1.default.get(constants_1.PROXY_SETTING_KEY, (0, object_helper_1.getClass)(this));
console.info(`[PROXY - ${proxyMetadata.name}] ${this.source} -> ${this.target}`);
server.use(this.source, this.proxyHandler);
}
}
;
const settings = {
source,
targetUrl,
name: ProxyContainerClass.name
};
MetaData_1.default.set(constants_1.PROXY_SETTING_KEY, settings, ProxyContainerClass);
return ExpressiveTeaProxy;
};
}
exports.ProxyContainer = ProxyContainer;
function ProxyOption(option) {
return (target, propertyKey, descriptor) => {
if (NON_ASYNC_METHODS.includes(option) && (0, object_helper_1.isAsyncFunction)(descriptor.value)) {
throw new RequestExceptions_1.GenericRequestException(`${String(propertyKey)} must not be declared as Async Function.`);
}
MetaData_1.default.set(constants_1.PROXY_SETTING_KEY, descriptor, target, option);
};
}
exports.ProxyOption = ProxyOption;
function ProxyProperty(option, value) {
return (target, propertyKey) => {
MetaData_1.default.set(constants_1.PROXY_SETTING_KEY, propertyKey, target, option);
let currentValue = target[propertyKey];
Object.defineProperty(target, propertyKey, {
get: () => value,
set: () => { currentValue = value; }
});
};
}
exports.ProxyProperty = ProxyProperty;