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import * as express from 'express';
import { Endpoint } from './endpoints';
import authenticate from './authenticate';
import { IAuthContext } from './authenticate';
import _reply from './reply';
import limitter from './limitter';
export default async (endpoint: Endpoint, req: express.Request, res: express.Response) => {
const reply = _reply.bind(null, res);
let ctx: IAuthContext;
// Authentication
try {
ctx = await authenticate(req);
} catch (e) {
return reply(403, 'AUTHENTICATION_FAILED');
}
if (endpoint.secure && !ctx.isSecure) {
return reply(403, 'ACCESS_DENIED');
}
if (endpoint.withCredential && ctx.user == null) {
return reply(401, 'PLZ_SIGNIN');
}
if (ctx.app && endpoint.kind) {
if (!ctx.app.permission.some(p => p === endpoint.kind)) {
return reply(403, 'ACCESS_DENIED');
}
}
if (endpoint.withCredential && endpoint.limit) {
try {
await limitter(endpoint, ctx); // Rate limit
} catch (e) {
// drop request if limit exceeded
return reply(429);
}
}
let exec = require(`${__dirname}/endpoints/${endpoint.name}`);
if (endpoint.withFile) {
exec = exec.bind(null, req.file);
}
// API invoking
try {
const res = await exec(req.body, ctx.user, ctx.app, ctx.isSecure);
reply(res);
} catch (e) {
reply(400, e);
}
};
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