moleculer-api
Version:
A dynamic API Gateway for MoleculerJS which updates REST endpoints and aggregated GraphQL schema, access control policy for each action calls from metadata of remote services schema without restart or deployment.
95 lines • 4.24 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.APIRequestContext = void 0;
const tslib_1 = require("tslib");
const qs_1 = tslib_1.__importDefault(require("qs"));
const url = tslib_1.__importStar(require("url"));
class APIRequestContext {
constructor(props) {
Object.assign(this, props);
Object.defineProperty(this, APIRequestContext.StoreSymbol, { value: new Map(), enumerable: true, configurable: false, writable: false }); // should be enumerable, ... for plugins which adjust given context
}
static createConstructor(factories, hooks) {
return (source) => tslib_1.__awaiter(this, void 0, void 0, function* () {
if (source.hasOwnProperty(APIRequestContext.SourceContextIsCreatingSymbol)) {
throw new Error("request already handled"); // TODO: normalize error
}
// update headers for websocket headers (blabla?headers=JSON.stringify({ ... }))
if (source.headers.connection === "upgrade") {
try {
const { query } = url.parse(source.url);
if (query) {
const headersJSON = qs_1.default.parse(query, { allowPrototypes: true }).headers;
if (headersJSON && typeof headersJSON === "string") {
const headers = JSON.parse(headersJSON);
for (const [k, v] of Object.entries(headers)) {
if (typeof v === "string") {
source.headers[k.toLowerCase()] = v;
}
}
}
}
}
catch (err) {
console.error(err);
}
}
// add reference to source which denote parsing context currently
Object.defineProperty(source, APIRequestContext.SourceContextIsCreatingSymbol, { value: true });
if (hooks && hooks.before) {
hooks.before(source);
}
// create props
const props = {};
const propEntries = yield Promise.all(factories.map((factory) => tslib_1.__awaiter(this, void 0, void 0, function* () { return [factory.key, yield factory.create(source)]; })));
for (const [k, v] of propEntries) {
props[k] = v;
}
// create context
const context = new APIRequestContext(props);
// add reference to source
Object.defineProperty(source, APIRequestContext.SourceContextSymbol, { value: context });
if (hooks && hooks.after) {
hooks.after(source, context);
}
return context;
});
}
static find(source) {
if (source.hasOwnProperty(APIRequestContext.SourceContextSymbol)) {
return source[APIRequestContext.SourceContextSymbol];
}
return null;
}
static findProps(source) {
if (source.hasOwnProperty(APIRequestContext.SourceContextSymbol)) {
return source[APIRequestContext.SourceContextSymbol];
}
return null;
}
static isCreating(source) {
return source.hasOwnProperty(APIRequestContext.SourceContextIsCreatingSymbol);
}
/* internal store for broker delegator and plugins */
set(symbol, value, clear) {
const store = this[APIRequestContext.StoreSymbol];
store.set(symbol, [value, clear]);
}
get(symbol) {
const store = this[APIRequestContext.StoreSymbol];
const item = store.get(symbol);
return item ? item[0] : undefined;
}
clear() {
const store = this[APIRequestContext.StoreSymbol];
for (const [value, clear] of store.values()) {
clear(value);
}
store.clear();
}
}
exports.APIRequestContext = APIRequestContext;
APIRequestContext.SourceContextIsCreatingSymbol = Symbol("APIRequestContextIsCreating");
APIRequestContext.SourceContextSymbol = Symbol("APIRequestContext");
APIRequestContext.StoreSymbol = Symbol("APIRequestContextStore");
//# sourceMappingURL=context.js.map