ストリーム経由でAPIにリクエストできるように

src/server/api/call.ts

@@ -0,0 +1,55 @@
+import * as express from 'express';
+
+import endpoints, { Endpoint } from './endpoints';
+import limitter from './limitter';
+import { IUser } from '../../models/user';
+import { IApp } from '../../models/app';
+
+export default (endpoint: string | Endpoint, user: IUser, app: IApp, data: any, req?: express.Request) => new Promise(async (ok, rej) => {
+	const isSecure = user != null && app == null;
+
+	//console.log(endpoint, user, app, data);
+
+	const ep = typeof endpoint == 'string' ? endpoints.find(e => e.name == endpoint) : endpoint;
+
+	if (ep.secure && !isSecure) {
+		return rej('ACCESS_DENIED');
+	}
+
+	if (ep.withCredential && user == null) {
+		return rej('SIGNIN_REQUIRED');
+	}
+
+	if (app && ep.kind) {
+		if (!app.permission.some(p => p === ep.kind)) {
+			return rej('PERMISSION_DENIED');
+		}
+	}
+
+	if (ep.withCredential && ep.limit) {
+		try {
+			await limitter(ep, user); // Rate limit
+		} catch (e) {
+			// drop request if limit exceeded
+			return rej('RATE_LIMIT_EXCEEDED');
+		}
+	}
+
+	let exec = require(`${__dirname}/endpoints/${ep.name}`);
+
+	if (ep.withFile && req) {
+		exec = exec.bind(null, req.file);
+	}
+
+	let res;
+
+	// API invoking
+	try {
+		res = await exec(data, user, app);
+	} catch (e) {
+		rej(e);
+		return;
+	}
+
+	ok(res);
+});