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'use strict';
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const _ = require('lodash');
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const logger = global.yoho.logger;
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const ip = require('./rules/ip-list2');
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const userAgent = require('./rules/useragent');
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const ipWhiteList = require('./rules/ip-white-list');
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const pathWhiteList = require('./rules/path-white-list');
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const qpsLimiter = require('./rules/qps-limit2');
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const co = Promise.coroutine;
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// const asynchronous = require('./rules/asynchronous');
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// const fakerLimiter = require('./rules/faker-limit');
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const captchaPolicy = require('./policies/captcha');
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// const reporterPolicy = require('./policies/reporter');
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const limiter = (rule, policy, context) => {
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return rule(context, policy);
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};
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// 排除条件:ip白名单/路径白名单/异步请求/登录用户
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const _excluded = (req) => {
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let remoteIp = req.yoho.clientIp || '';
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return co(function* () {
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let atIPWhiteList = yield ipWhiteList(remoteIp);
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return Boolean(
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atIPWhiteList ||
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_.includes(pathWhiteList(), req.path) ||
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req.xhr ||
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!_.isEmpty(_.get(req, 'user.uid'))
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);
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})();
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};
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module.exports = (req, res, next) => {
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const remoteIp = req.yoho.clientIp || '';
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const enabled = !_.get(req.app.locals, 'wap.sys.noLimiter');
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// 开关为关或者未获取到remoteIp,放行
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if (!enabled || !remoteIp) {
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logger.debug(`request remote ip: ${remoteIp}; enabled: ${enabled}`);
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return next();
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}
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co(function* () {
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let excluded = yield _excluded(req);
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logger.debug(`request remote ip: ${remoteIp}; excluded: ${excluded}; enabled: ${enabled}`);
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// 白名单,放行
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if (excluded) {
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return next();
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}
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const context = {
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req: req,
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res: res,
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next: next,
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remoteIp: remoteIp
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};
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let results = yield Promise.all([
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limiter(userAgent, captchaPolicy, context),
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limiter(ip, captchaPolicy, context),
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limiter(qpsLimiter, captchaPolicy, context)
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// limiter(asynchronous, captchaPolicy, context)
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// limiter(fakerLimiter, reporterPolicy, context)
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]);
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let allPass = true, exclusion = false, policy = null;
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logger.debug('limiter result: ' + JSON.stringify(results));
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_.forEach(results, (result) => {
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if (typeof result === 'object' && !exclusion) {
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exclusion = result.exclusion;
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}
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if (typeof result === 'function') {
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allPass = false;
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policy = result;
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}
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});
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if (exclusion) {
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return next();
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} else if (!allPass && policy) {
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policy(req, res, next);
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} else {
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return next();
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}
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})().catch(err => {
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logger.error(err);
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return next();
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});
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}; |
...
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...
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