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import { request } from 'https';
const { sign } = require('http-signature');
import { URL } from 'url';
import * as debug from 'debug';
import * as crypto from 'crypto';
const { lookup } = require('lookup-dns-cache');
import * as promiseAny from 'promise-any';
import config from '../../config';
import { ILocalUser } from '../../models/user';
import { publishApLogStream } from '../../stream';
const log = debug('misskey:activitypub:deliver');
export default (user: ILocalUser, url: string, object: any) => new Promise(async (resolve, reject) => {
log(`--> ${url}`);
const timeout = 10 * 1000;
const { protocol, host, hostname, port, pathname, search } = new URL(url);
const data = JSON.stringify(object);
const sha256 = crypto.createHash('sha256');
sha256.update(data);
const hash = sha256.digest('base64');
const addr = await resolveAddr(hostname).catch(e => reject(e));
if (!addr) return;
const req = request({
protocol,
hostname: addr,
setHost: false,
port,
method: 'POST',
path: pathname + search,
timeout,
headers: {
'Host': host,
'User-Agent': config.user_agent,
'Content-Type': 'application/activity+json',
'Digest': `SHA-256=${hash}`
}
}, res => {
log(`${url} --> ${res.statusCode}`);
if (res.statusCode >= 400) {
reject(res);
} else {
resolve();
}
});
sign(req, {
authorizationHeaderName: 'Signature',
key: user.keypair,
keyId: `${config.url}/users/${user._id}/publickey`,
headers: ['date', 'host', 'digest']
});
// Signature: Signature ... => Signature: ...
let sig = req.getHeader('Signature').toString();
sig = sig.replace(/^Signature /, '');
req.setHeader('Signature', sig);
req.on('timeout', () => req.abort());
req.on('error', e => {
if (req.aborted) reject('timeout');
reject(e);
});
req.end(data);
//#region Log
publishApLogStream({
direction: 'out',
activity: object.type,
host: null,
actor: user.username
});
//#endregion
});
/**
* Resolve host (with cached, asynchrony)
*/
async function resolveAddr(domain: string) {
// v4/v6で先に取得できた方を採用する
return await promiseAny([
resolveAddrInner(domain, { ipv6: false }),
resolveAddrInner(domain, { ipv6: true })
]);
}
function resolveAddrInner(domain: string, options = { }): Promise<string> {
return new Promise((res, rej) => {
lookup(domain, options, (error: any, address: string) => {
if (error) return rej(error);
return res(address);
});
});
}
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