今天初試egg.js,比這葫蘆（https://eggjs.org/zh-cn/intro/）畫瓢的過程中遇到了2個問題，已經解決，再次做下記錄，同時分享給大家，以便後來遇到問題的小夥伴能夠解決！
問題1：get請求沒問題，post卻請求不到？提示信息爲：
2018-08-24 10:09:25,008 WARN 11672 [-/127.0.0.1/-/127ms POST /childController] invalid csrf token. See https://eggjs.org/zh-cn/core/security.html#安全威脅csrf的防範
2018-08-24 10:09:25,013 WARN 11672 [-/127.0.0.1/-/132ms POST /childController] nodejs.ForbiddenError: invalid csrf token
at Object.throw (E:\egg_work\egg-simple\node_modules\koa\lib\context.js:96:11)
at Object.assertCsrf (E:\egg_work\egg-simple\node_modules\egg-security\app\extend\context.js:157:17)
at csrf (E:\egg_work\egg-simple\node_modules\egg-security\lib\middlewares\csrf.js:31:9)
at dispatch (E:\egg_work\egg-simple\node_modules\koa-compose\index.js:42:32)
at E:\egg_work\egg-simple\node_modules\koa-compose\index.js:34:12
at dispatch (E:\egg_work\egg-simple\node_modules\koa-compose\index.js:42:32)
at session (E:\egg_work\egg-simple\node_modules\koa-session\index.js:41:13)
at dispatch (E:\egg_work\egg-simple\node_modules\koa-compose\index.js:42:32)
at overrideMethod (E:\egg_work\egg-simple\node_modules\koa-override\index.js:38:12)
at dispatch (E:\egg_work\egg-simple\node_modules\koa-compose\index.js:42:32)
message: "invalid csrf token"
pid: 11672
hostname: DESKTOP-872SO2H
原因：
解決方案：找到node_modules 下的 egg-security →config→config.default.js 找到csrf這個對象下的enable改爲false。
問題 2：api 上說controller支持多級目錄，而我測試在controller下又創建了一個新的目錄，發現同樣請求不到？
原因：其實我這個算是特殊的例子。
錯誤信息：
E:\egg_work\egg-simple\node_modules\egg\lib\application.js:69
throw e;
^
TypeError: Cannot read property 'index' of undefined
at module.exports.app (E:\egg_work\egg-simple\app\router.js:9:63)
at AppWorkerLoader.loadFile (E:\egg_work\egg-simple\node_modules\egg-core\lib\loader\egg_loader.js:299:29)
at AppWorkerLoader.loadRouter (E:\egg_work\egg-simple\node_modules\egg-core\lib\loader\mixin\router.js:17:10)
at AppWorkerLoader.load (E:\egg_work\egg-simple\node_modules\egg\lib\loader\app_worker_loader.js:41:10)
at new Application (E:\egg_work\egg-simple\node_modules\egg\lib\application.js:65:19)
at Object.<anonymous> (E:\egg_work\egg-simple\node_modules\egg-cluster\lib\app_worker.js:20:13)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
[2018-08-24 10:25:21.899] [cfork:master:2244] worker:5520 disconnect (exitedAfterDisconnect: false, state: disconnected, isDead: false, worker.disableRefork: true)
[2018-08-24 10:25:21.899] [cfork:master:2244] don't fork, because worker:5520 will be kill soon
2018-08-24 10:25:21,899 INFO 2244 [master] app_worker#4:5520 disconnect, suicide: false, state: disconnected, current workers: ["4"]
[2018-08-24 10:25:21.905] [cfork:master:2244] worker:5520 exit (code: 1, exitedAfterDisconnect: false, state: dead, isDead: true, isExpected: false, worker.disableRefork: true)
2018-08-24 10:25:21,905 ERROR 2244 nodejs.AppWorkerDiedError: [master] app_worker#4:5520 died (code: 1, signal: null, suicide: false, state: dead), current workers: []
at Master.onAppExit (E:\egg_work\egg-simple\node_modules\egg-cluster\lib\master.js:388:21)
at emitOne (events.js:116:13)
at Master.emit (events.js:211:7)
at Messenger.sendToMaster (E:\egg_work\egg-simple\node_modules\egg-cluster\lib\utils\messenger.js:122:17)
at Messenger.send (E:\egg_work\egg-simple\node_modules\egg-cluster\lib\utils\messenger.js:87:12)
at EventEmitter.cluster.on (E:\egg_work\egg-simple\node_modules\egg-cluster\lib\master.js:265:22)
at emitThree (events.js:141:20)
at EventEmitter.emit (events.js:217:7)
at ChildProcess.worker.process.once (internal/cluster/master.js:189:13)
at Object.onceWrapper (events.js:317:30)
name: "AppWorkerDiedError"
pid: 2244
hostname: DESKTOP-872SO2H
TypeError: Cannot read property 'index' of undefined，爲什麼找不到index.js呢？
最後，也是在api中找到了答案。router.js 中配置的文件級聯目錄+文件，會自動轉爲駝峯命名方式，其他則不識別
https://eggjs.org/zh-cn/advanced/loader.html#%E6%96%87%E4%BB%B6%E5%8A%A0%E8%BD%BD%E8%A7%84%E5%88%99
解決方案：將router.js 中的目錄和文件名配置改爲駝峯命名法。
答案都在api中，歸根到底是文檔沒有看仔細，警示大家，看文檔一定要看仔細，否則處處是坑啊
