index2.js
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'use strict';
const _ = require('lodash');
const logger = global.yoho.logger;
const ip = require('./rules/ip-list2');
const userAgent = require('./rules/useragent2');
// const asynchronous = require('./rules/asynchronous');
// const fakerLimiter = require('./rules/faker-limit');
const captchaPolicy = require('./policies/captcha');
// const reporterPolicy = require('./policies/reporter');
const limiter = (rule, policy, context) => {
return rule(context, policy);
};
module.exports = (req, res, next) => {
const remoteIp = req.yoho.clientIp || '';
const enabled = !_.get(req.app.locals, 'wap.sys.noLimiter');
// 开关为关或者未获取到remoteIp,放行
if (!enabled || !remoteIp) {
logger.debug(`request remote ip: ${remoteIp}; enabled: ${enabled}`);
return next();
}
(async function() {
const context = {
req: req,
res: res,
next: next,
remoteIp: remoteIp
};
let results = await Promise.all([
limiter(userAgent, captchaPolicy, context),
limiter(ip, captchaPolicy, context),
]);
let allPass = true, exclusion = false, policy = null;
logger.debug('limiter result: ' + JSON.stringify(results));
_.forEach(results, (result) => {
if (typeof result === 'object' && !exclusion) {
exclusion = result.exclusion;
}
if (typeof result === 'function') {
allPass = false;
policy = result;
}
});
if (exclusion) {
return next();
} else if (!allPass && policy) {
policy(req, res, next);
} else {
return next();
}
}()).catch(err => {
logger.error(err);
return next();
});
};