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make it possible to stream public timelines without authorization (#5977)

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* make it possible to stream public timelines without authorization

* Fix

* Make eslint allow `value == null`

* Remove redundant line

* Improve style and revert .eslintrc.yml

* Fix streamWsEnd

* Show IP address instead of (anonymous user)

* Add missing semicolon
This commit is contained in:
nullkal 2017-12-12 23:13:24 +09:00 committed by Eugen Rochko
parent 19257d91bf
commit cfea28216f
1 changed files with 71 additions and 28 deletions
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59
streaming/index.js
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@ -97,6 +97,8 @@ const startWorker = (workerId) => {
};
const app = express();
app.set('trusted proxy', process.env.TRUSTED_PROXY_IP || 'loopback,uniquelocal');
const pgPool = new pg.Pool(Object.assign(pgConfigs[env], dbUrlToConfig(process.env.DATABASE_URL)));
const server = http.createServer(app);
const redisNamespace = process.env.REDIS_NAMESPACE || null;
@ -177,6 +179,12 @@ const startWorker = (workerId) => {
next();
};
const setRemoteAddress = (req, res, next) => {
req.remoteAddress = req.connection.remoteAddress;
next();
};
const accountFromToken = (token, req, next) => {
pgPool.connect((err, client, done) => {
if (err) {
@ -208,17 +216,22 @@ const startWorker = (workerId) => {
});
};
const accountFromRequest = (req, next) => {
const accountFromRequest = (req, next, required = true) => {
const authorization = req.headers.authorization;
const location = url.parse(req.url, true);
const accessToken = location.query.access_token;
if (!authorization && !accessToken) {
if (required) {
const err = new Error('Missing access token');
err.statusCode = 401;
next(err);
return;
} else {
next();
return;
}
}
const token = authorization ? authorization.replace(/^Bearer /, '') : accessToken;
@ -226,7 +239,17 @@ const startWorker = (workerId) => {
accountFromToken(token, req, next);
};
const PUBLIC_STREAMS = [
'public',
'public:local',
'hashtag',
'hashtag:local',
];
const wsVerifyClient = (info, cb) => {
const location = url.parse(info.req.url, true);
const authRequired = !PUBLIC_STREAMS.some(stream => stream === location.query.stream);
accountFromRequest(info.req, err => {
if (!err) {
cb(true, undefined, undefined);
@ -234,16 +257,24 @@ const startWorker = (workerId) => {
log.error(info.req.requestId, err.toString());
cb(false, 401, 'Unauthorized');
}
});
}, authRequired);
};
const PUBLIC_ENDPOINTS = [
'/api/v1/streaming/public',
'/api/v1/streaming/public/local',
'/api/v1/streaming/hashtag',
'/api/v1/streaming/hashtag/local',
];
const authenticationMiddleware = (req, res, next) => {
if (req.method === 'OPTIONS') {
next();
return;
}
accountFromRequest(req, next);
const authRequired = !PUBLIC_ENDPOINTS.some(endpoint => endpoint === req.path);
accountFromRequest(req, next, authRequired);
};
const errorMiddleware = (err, req, res, {}) => {
@ -275,8 +306,10 @@ const startWorker = (workerId) => {
};
const streamFrom = (id, req, output, attachCloseHandler, needsFiltering = false, notificationOnly = false) => {
const accountId = req.accountId || req.remoteAddress;
const streamType = notificationOnly ? ' (notification)' : '';
log.verbose(req.requestId, `Starting stream from ${id} for ${req.accountId}${streamType}`);
log.verbose(req.requestId, `Starting stream from ${id} for ${accountId}${streamType}`);
const listener = message => {
const { event, payload, queued_at } = JSON.parse(message);
@ -286,7 +319,7 @@ const startWorker = (workerId) => {
const delta = now - queued_at;
const encodedPayload = typeof payload === 'object' ? JSON.stringify(payload) : payload;
log.silly(req.requestId, `Transmitting for ${req.accountId}: ${event} ${encodedPayload} Delay: ${delta}ms`);
log.silly(req.requestId, `Transmitting for ${accountId}: ${event} ${encodedPayload} Delay: ${delta}ms`);
output(event, encodedPayload);
};
@ -313,6 +346,7 @@ const startWorker = (workerId) => {
return;
}
if (!req.accountId) {
const queries = [
client.query(`SELECT 1 FROM blocks WHERE (account_id = $1 AND target_account_id IN (${placeholders(targetAccountIds, 2)})) OR (account_id = $2 AND target_account_id = $1) UNION SELECT 1 FROM mutes WHERE account_id = $1 AND target_account_id IN (${placeholders(targetAccountIds, 2)})`, [req.accountId, unpackedPayload.account.id].concat(targetAccountIds)),
];
@ -333,6 +367,9 @@ const startWorker = (workerId) => {
done();
log.error(err);
});
} else {
transmit();
}
});
} else {
transmit();
@ -345,13 +382,15 @@ const startWorker = (workerId) => {
// Setup stream output to HTTP
const streamToHttp = (req, res) => {
const accountId = req.accountId || req.remoteAddress;
res.setHeader('Content-Type', 'text/event-stream');
res.setHeader('Transfer-Encoding', 'chunked');
const heartbeat = setInterval(() => res.write(':thump\n'), 15000);
req.on('close', () => {
log.verbose(req.requestId, `Ending stream for ${req.accountId}`);
log.verbose(req.requestId, `Ending stream for ${accountId}`);
clearInterval(heartbeat);
});
@ -383,8 +422,10 @@ const startWorker = (workerId) => {
// Setup stream end for WebSockets
const streamWsEnd = (req, ws, closeHandler = false) => (id, listener) => {
const accountId = req.accountId || req.remoteAddress;
ws.on('close', () => {
log.verbose(req.requestId, `Ending stream for ${req.accountId}`);
log.verbose(req.requestId, `Ending stream for ${accountId}`);
unsubscribe(id, listener);
if (closeHandler) {
closeHandler();
@ -392,7 +433,7 @@ const startWorker = (workerId) => {
});
ws.on('error', () => {
log.verbose(req.requestId, `Ending stream for ${req.accountId}`);
log.verbose(req.requestId, `Ending stream for ${accountId}`);
unsubscribe(id, listener);
if (closeHandler) {
closeHandler();
@ -401,6 +442,7 @@ const startWorker = (workerId) => {
};
app.use(setRequestId);
app.use(setRemoteAddress);
app.use(allowCrossDomain);
app.use(authenticationMiddleware);
app.use(errorMiddleware);
@ -451,6 +493,7 @@ const startWorker = (workerId) => {
const req = ws.upgradeReq;
const location = url.parse(req.url, true);
req.requestId = uuid.v4();
req.remoteAddress = ws._socket.remoteAddress;
ws.isAlive = true;