index.js

const Koa = require('koa');

const logger = require('./utils/logger');
const config = require('./config');

const onerror = require('./middleware/onerror');
const header = require('./middleware/header.js');
const utf8 = require('./middleware/utf8');
const memoryCache = require('./middleware/lru-cache.js');
const redisCache = require('./middleware/redis-cache.js');
const filter = require('./middleware/filter.js');
const template = require('./middleware/template.js');
const favicon = require('koa-favicon');
const debug = require('./middleware/debug.js');

const router = require('./router');

process.on('uncaughtException', (e) => {
    logger.error('uncaughtException: ' + e);
});

logger.info('🎉 RSSHub start! Cheers!');

const app = new Koa();
app.proxy = true;

// favicon
app.use(favicon(__dirname + '/favicon.png'));

// global error handing
app.use(onerror);

// 1 set header
app.use(header);

// 6 debug
app.context.debug = {
    hitCache: 0,
    request: 0,
    routes: [],
    ips: [],
};
app.use(debug);

// 5 fix incorrect `utf-8` characters
app.use(utf8);

// 4 generate body
app.use(template);

// 3 filter content
app.use(filter);

// 2 cache
if (config.cacheType === 'memory') {
    app.use(
        memoryCache({
            app: app,
            expire: config.cacheExpire,
            ignoreQuery: true,
        })
    );
} else if (config.cacheType === 'redis') {
    app.use(
        redisCache({
            app: app,
            expire: config.cacheExpire,
            ignoreQuery: true,
            redis: config.redis,
            onerror: (e) => {
                logger.error('Redis error: ', e);
            },
            onconnect: () => {
                logger.info('Redis connected.');
            },
        })
    );
}

// router
app.use(router.routes()).use(router.allowedMethods());

app.listen(config.port, parseInt(config.listenInaddrAny) ? null : '127.0.0.1');