乾貨!NPM私服 + 自定義NFS

Cnpm,官方解釋爲Company npm。html

因爲團隊需求,如今須要搭建一個npm私服,用來更方便地管理團隊的組件庫,而且更快速更穩定地提供服務,我踏上了搭建npm私服的道路。node

Clone cnpmjs.org項目代碼

git clone https://github.com/cnpm/cnpmjs.org.gitmysql

下載完代碼後,我們先來大概瞄一眼項目目錄react

+-- bin/                            ---一些命令腳本
|   --- nodejsctl                        ---npm start啓動的腳本
|   --- ...    
+-- common/                         ---公共目錄,存放日誌配置、郵件配置等
+-- config/                         
|   --- index.js                    ---主要配置文件
+-- controllers/                                 
|   --- registry/                   ---7001端口的controller層
|   --- web/                        ---7002端口的controller層
|   --- sync_module_worker.js       ---sync的主進程文件        
|   --- ...                         
+-- docs/                                 
|   --- db.sql                      ---數據庫建表sql
|   --- ...                         
+-- lib/           
+-- middleware/       
+-- models/                         ---數據庫操做目錄
+-- public/   
+-- routes/                                 
|   --- registry.js                 ---7001端口的路由文件
|   --- web.js                      ---7002端口的路由文件
|   --- ...                         
+-- servers/                                 
|   --- registry.js                 ---7001端口的服務器入口文件
|   --- web.js                      ---7002端口的服務器入口文件
|   --- ...                         
+-- services/
+-- sync/                                 
|   --- sync_all.js                 ---sync模式選擇all時執行的文件
|   --- sync_exist.js               ---sync模式選擇exist時執行的文件
|   --- ...    
+-- test/
+-- tools/
+-- view/
--- dispatch.js                     ---啓動npm服務的主要文件,bin/nodejsctl中執行的就是這個文件
--- package.json   

複製代碼

咱們能夠發現,cnpm使用的是koa框架,結構是經典的route->controller->services->modelgit

同步模塊的具體流程是在controllers/sync_module_worker.js文件中的github

1. 根據設置的sync模式,從上游源中下載模塊到一個臨時路徑/root/.cnpmjs.org/downloads/xxxxx.tgz
2. 調用nfs.upload方法將臨時路徑存儲的tgz上傳到指定存儲位置
3. 不管是否上傳成功,都刪除剛剛下載的臨時文件
複製代碼

看到這裏,喜歡思考的同窗或許會說了,我到底應該怎麼搭建本身的npm私服?你說了半天,我仍是啥都不知道,好比吧:web

  1. sync模式怎麼選擇呢?
  2. 上游源是什麼呢?
  3. 臨時路徑爲何是root/.cnpmjs.org/downloads?我能隨意修改嗎?
  4. nfs.upload是什麼呢,究竟是將tgz上傳到哪裏呢?
  5. 須要數據庫嗎,數據庫配置又在哪裏呢????
  6. 7001端口是什麼,7002端口又是什麼??
  7. 搭建完成後,我應該怎麼使用個人私服?

配置config/index.js文件~

var config = {
  version: version,
  dataDir: dataDir,

  /**
   * Cluster mode
   */
  enableCluster: true,
  numCPUs: os.cpus().length,

  /*
   * server configure
   */

  registryPort: 7001,
  webPort: 7002,
  bindingHost: '0.0.0.0', // only binding on 127.0.0.1 for local access

  // debug mode
  // if in debug mode, some middleware like limit wont load
  // logger module will print to stdout
  debug: process.env.NODE_ENV === 'development',
  
  // page mode, enable on development env
  pagemock: process.env.NODE_ENV === 'development',
  
  // session secret
  sessionSecret: 'cnpmjs.org test session secret',
  
  // max request json body size
  jsonLimit: '10mb',
  
  // log dir name
  logdir: path.join(dataDir, 'logs'),
  
  // update file template dir
  uploadDir: path.join(dataDir, 'downloads'),
  
  // web page viewCache
  viewCache: false,

  // config for koa-limit middleware
  // for limit download rates
  limit: {
    enable: false,
    token: 'koa-limit:download',
    limit: 1000,
    interval: 1000 * 60 * 60 * 24,
    whiteList: [],
    blackList: [],
    message: 'request frequency limited, any question, please contact fengmk2@gmail.com',
  },

  enableCompress: true, // enable gzip response or not

  // default system admins
  admins: {
    // name: email
    sunxiuguo: 'sunxiuguo@my.com',
  },

  // email notification for errors
  // check https://github.com/andris9/Nodemailer for more informations
  mail: {
    enable: false,
    appname: 'cnpmjs.org',
    from: 'cnpmjs.org mail sender <adderss@gmail.com>',
    service: 'gmail',
    auth: {
      user: 'address@gmail.com',
      pass: 'your password'
    }
  },

  logoURL: 'https://os.alipayobjects.com/rmsportal/oygxuIUkkrRccUz.jpg', // cnpm logo image url
  adBanner: '',
  customReadmeFile: '', // you can use your custom readme file instead the cnpm one
  customFooter: '', // you can add copyright and site total script html here
  npmClientName: 'cnpm', // use `${name} install package`
  packagePageContributorSearch: true, // package page contributor link to search, default is true

  // max handle number of package.json `dependencies` property
  maxDependencies: 200,
  
  // backup filepath prefix
  backupFilePrefix: '/cnpm/backup/',

  /**
   * database config
   */

  database: {
    db: '******',  // 庫名
    username: '*********', // 數據庫用戶名
    password: '************', // 數據庫密碼

    // the sql dialect of the database
    // - currently supported: 'mysql', 'sqlite', 'postgres', 'mariadb'
    dialect: 'mysql',

    // the Docker container network hostname defined at docker-compose.yml
    host: '**************',  // 數據庫域名

    // custom port; default: 3306
    port: 3318,  // 數據庫端口號

    // use pooling in order to reduce db connection overload and to increase speed
    // currently only for mysql and postgresql (since v1.5.0)
    pool: {
      maxConnections: 10,
      minConnections: 0,
      maxIdleTime: 30000
    },

    dialectOptions: {
      // if your server run on full cpu load, please set trace to false
      trace: true,
    },

    // the storage engine for 'sqlite'
    // default store into ~/.cnpmjs.org/data.sqlite
    storage: path.join(dataDir, 'data.sqlite'),

    logging: !!process.env.SQL_DEBUG,
  },

  // package tarball store in local filesystem by default
  nfs: aws.create({
    accessKeyId: '*************',  // s3 accessKeyId
    secretAccessKey: '****************', // s3 secretAccessKey
    // change to your endpoint
    endpoint: '*****************', // https://docs.aws.amazon.com/zh_cn/general/latest/gr/rande.html
    bucket: 'npm-online', // s3 bucket名稱
    signatureVersion: 'v4', // s3 api版本
    mode: 'private', // public: 經過url下載tar包; private: 經過key下載tar包
  }),
  
  // if set true, will 302 redirect to `nfs.url(dist.key)`
  downloadRedirectToNFS: false,

  // registry url name
  registryHost: 'registry.npm.my.com',

  /**
   * registry mode config
   */

  // enable private mode or not
  // private mode: only admins can publish, other users just can sync package from source npm
  // public mode: all users can publish
  enablePrivate: false,

  // registry scopes, if dont set, means do not support scopes
  scopes: [ '@cnpm', '@sunxiuguo', '@companyName' ],

  // some registry already have some private packages in global scope
  // but we want to treat them as scoped private packages,
  // so you can use this white list.
  privatePackages: [],

  /**
   * sync configs
   */

  // the official npm registry
  // cnpm wont directly sync from this one
  // but sometimes will request it for some package infomations
  // please dont change it if not necessary
  officialNpmRegistry: 'https://registry.npmjs.com',
  officialNpmReplicate: 'https://replicate.npmjs.com',

  // sync source, upstream registry
  // If you want to directly sync from official npm registry
  // please drop them an email first
  sourceNpmRegistry: 'https://registry.npm.taobao.org',
  sourceNpmWeb: 'https://npm.taobao.org',

  // upstream registry is base on cnpm/cnpmjs.org or not
  // if your upstream is official npm registry, please turn it off
  sourceNpmRegistryIsCNpm: true,

  // if install return 404, try to sync from source registry
  syncByInstall: true,

  // sync mode select
  // none: do not sync any module, proxy all public modules from sourceNpmRegistry
  // exist: only sync exist modules
  // all: sync all modules
  syncModel: 'exist', // 'none', 'all', 'exist'

  syncConcurrency: 1,
  // sync interval, default is 10 minutes
  syncInterval: '10m',

  // sync polular modules, default to false
  // because cnpm can not auto sync tag change for now
  // so we want to sync popular modules to ensure their tags
  syncPopular: false,
  syncPopularInterval: '1h',
  // top 100
  topPopular: 100,

  // sync devDependencies or not, default is false
  syncDevDependencies: false,
  // try to remove all deleted versions from original registry
  syncDeletedVersions: true,

  // changes streaming sync
  syncChangesStream: false,
  handleSyncRegistry: 'http://127.0.0.1:7001',

  // default badge subject
  badgeSubject: 'cnpm',
  // defautl use https://badgen.net/
  badgeService: {
    url: function(subject, status, options) {
      options = options || {};
      let url = `https://badgen.net/badge/${utility.encodeURIComponent(subject)}/${utility.encodeURIComponent(status)}`;
      if (options.color) {
        url += `/${utility.encodeURIComponent(options.color)}`;
      }
      if (options.icon) {
        url += `?icon=${utility.encodeURIComponent(options.icon)}`;
      }
      return url;
    },
  },

  packagephobiaURL: 'https://packagephobia.now.sh',
  packagephobiaSupportPrivatePackage: false,

  // custom user service, @see https://github.com/cnpm/cnpmjs.org/wiki/Use-Your-Own-User-Authorization
  // when you not intend to ingegrate with your company  user system, then use null, it would
  // use the default cnpm user system
  userService: null,

  // always-auth https://docs.npmjs.com/misc/config#always-auth
  // Force npm to always require authentication when accessing the registry, even for GET requests.
  alwaysAuth: false,

  // if you are behind firewall, need to request through http proxy, please set this
  // e.g.: `httpProxy: 'http://proxy.mycompany.com:8080'`
  // httpProxy: 'http://gfw.guazi-corp.com',
  httpProxy: null,


  // snyk.io root url
  snykUrl: 'https://snyk.io',

  // https://github.com/cnpm/cnpmjs.org/issues/1149
  // if enable this option, must create module_abbreviated and package_readme table in database
  enableAbbreviatedMetadata: true,

  // global hook function: function* (envelope) {}
  // envelope format please see https://github.com/npm/registry/blob/master/docs/hooks/hooks-payload.md#payload
  globalHook: null,

  opensearch: {
    host: '',
  },
};


複製代碼

是否是成功打開文件了~恭喜你!你成功的邁出了第二步!
什麼?你問第一步是什麼?第一步是clone代碼啊sql

配置文件解惑

  • sync模式是什麼?怎麼選擇?

    syncModel屬性控制sync模式,分爲none,exist,all三種狀況。docker

    • none:永不一樣步,只管理私有用戶上傳的包,其它源包會直接從源站獲取;
    • exist:定時同步已經存在於數據庫的包;
    • all:定時同步全部源站的包;
  • 上游源是什麼?怎麼設置?

    上游源就是你同步包的地址,好比你的上游源是淘寶源,那麼你的npm私服就會從淘寶源進行包的同步。shell

    • sourceNpmRegistry屬性控制上游源地址的設置,默認爲registry.npm.taobao.org
    • sourceNpmRegistryIsCNpm屬性表示上游源是不是cnpm,若是你的上游源是淘寶,此屬性設置爲true;若是你的上游源爲官方Npm源,那麼此屬性設置爲false
    • syncByInstall屬性爲true時,表示若是從你的私服源install時找不到包,那麼程序會自動從上游源進行同步。
  • 臨時路徑在哪?我能隨意修改嗎?

    uploadDir屬性設置同步的模塊存放的臨時路徑,默認爲path.join(dataDir, 'downloads'),即root/.cnpmjs.org/downloads

  • nfs.upload是什麼?要將tgz上傳到哪裏?

    nfs屬性控制包存儲,包括上傳,下載等等。nfs的意思是network file system

    • nfs默認使用的是fs-cnpm這個插件,能夠看到裏面定義了好多方法,好比upload,download,remove等等;
    • 能夠看到配置文件中nfs傳入了一個dir屬性,默認爲path.join(dataDir, 'nfs'),也就是root/.cnpmjs.org/nfs,即同步的包文件默認存放在這個目錄下;
    • 固然這只是一種文件存儲方案,咱們如今是接入的amazon s3的對象存儲系統來存儲包,這個後面會詳細說一下。
  • 須要數據庫嗎?數據庫配置在哪裏?
    • npm是須要數據庫的,docs/db.sql就是建表sql,數據庫存儲的信息主要是包信息,用戶信息,包和用戶的關聯信息,也會存儲npm服務器各類包的下載信息等。
    • 當從上游成功同步了一個包到npm服務器時,數據庫中就會記錄下這個包的相關信息,包文件則會存儲在nfs中。
    • database屬性就是設置數據庫信息的,包括庫名,用戶名,密碼,端口號,數據庫地址等等。
    • 只要把建表sql導入數據庫中,建立好全部的表便可
  • 7001和7002端口分別是什麼服務?

    registryPort屬性默認爲7001,webPort屬性默認爲7002.
    registry服務主要是用來提供給用戶源相關操做,好比設置npm源 web服務主要是提供給用戶的一個圖形化管理界面,好比在界面上查詢某個模塊

  • 除了上面這些,還須要什麼配置?
    • bindingHost: 設置爲0.0.0.0,開放給外部使用
    • admins: 能夠添加幾個管理員用戶 name: email的格式
    • registryHost:設置爲npm服務器7001端口的域名,好比我搭建npm的服務器7001端口的域名爲 registry.npm.my.com,就設置爲這個域名
    • scopes:能夠添加幾個前綴,之後發佈包的時候帶有這些前綴的,就表明是私有包

NFS個性化配置

由於咱們的npm私服是放在docker裏,包文件不可能使用fs-cnpm存儲在docker裏,因此咱們接入了amazon s3的對象存儲服務。
官方提供了接入npm的協議NFS-Guide

Can download the uploaded file through http request. like qn-cnpm.
uploadBuffer: use options.key to customize the filename, then callback {url: 'http://test.com/xxx.tgz'}.
url: accept a key and respond download url.
remove: remove file by key

Can not download by http request. like sfs-client or oss-cnpm.
uploadBuffer: upload the file, and must callback {key: 'xxx'}, so cnpmjs.org can record the key, and use this key to download or remove.
download: need provide download api to download the file by key.
createDownloadStream: streaming download file by key
remove: remove file by key
複製代碼

若是存儲系統支持經過http請求下載包文件,就提供uploadBuffer,url,remove方法 若是存儲系統不支持經過http請求下載包文件,就須要提供uploadBuffer,download,createDownloadStream,remove方法。
而且全部方法都須要是async的,或者是generatord的。

NFS接入S3對象存儲

由於咱們使用的bucket,首先要提供一個create的方法來實例化一個s3對象。

  • create
exports.create = function (options) {
    return new AwsWrapper(options);
};

function AwsWrapper(options) {
    this.client = new S3(options);
    this.mode = options.mode;
    this.bucket = options.bucket;
    var params = {
        Bucket: options.bucket,
        CreateBucketConfiguration: {
            LocationConstraint: ":npm"//桶所在服務區
        }
    };
    this.client.createBucket(params, function (err, data) {
        if (err) {
            // an error occurred
            logger.syncInfo(err);
        } else {
            // successful response
            console.log(data.Location);
        }
    });
}
複製代碼

而後按照協議提供對應的方法

  • uploadBuffer

    調用路徑在controllers/registry/package/save.js,當publish包時會進入這個方法,入參爲fileBuffer和options;
    這個方法很簡單,只需調用對應存儲系統提供的api,把buffer上傳便可。

    const key = trimKey(options.key);
      logger.syncInfo(`enter aws->uploadBuffer key=${key}`);
      let result = {
          key,
      };
    
      let uploadParams = {
          Bucket: this.bucket,
          Key: key,
          Body: fileBuffer
      };
    
      this.client.upload (uploadParams, function (err, data) {
          if (err) {
              logger.syncInfo(err);
          }
      });
    複製代碼
  • upload

    調用路徑在controllers/sync_module_worker.js,當從上游同步包的時候會進入這個方法,入參爲filePath和options
    upload和uploadBuffer不一樣的是,upload是讀取傳入的filePath的文件做爲body上傳,uploadBuffer是直接把傳入的buffer對象做爲body上傳。

const key = trimKey(options.key);
    logger.syncInfo(`進入aws->upload key=${key} filePath=${filePath}`);
    let result = {
        key,
    };
    let fileStream = fs.createReadStream(filePath);
    fileStream.on('error', function(err) {
        logger.syncInfo(err);
    });

    let uploadParams = {
        Bucket: this.bucket,
        Key: key,
        Body: fileStream
    };

    await this.client.upload (uploadParams, function (err, data) {
        if (err) {
            logger.syncInfo(err);
        }
    });
    return result;
複製代碼
  • url

    調用路徑在controllers/registry/package/download.js,當下載包的時候會進入這個方法,入參爲key和options,用於獲取包的存放的url地址

const params = { Bucket: this.bucket, Key: trimKey(key) };
    logger.syncInfo(`進入aws->url key=${key} trimKey=${trimKey(key)}`);
    return this.client.getSignedUrl('getObject', params);
複製代碼
  • remove

    調用路徑在controllers/registry/package/remove.js controllers/registry/package/remove_version.js 和 controllers/sync_module_worker.js,當刪除包或者刪除版本的時候會進入這個方法,入參爲key和options

const params = { Bucket: this.bucket, Key: trimKey(key) };
    logger.syncInfo(`進入aws->remove key=${key} trimKey=${trimKey(key)}`);
    await this.client.deleteObject(params);
複製代碼
  • createDownloadStream

    調用路徑在controllers/utils.js,當下載包的時候會進入這個方法,入參爲key和options,把可讀流做爲用戶下載請求的response的body
    utils.js中是惟一調用download和createDownloadStream的地方,然而咱們仔細看源碼,能夠發現若是定義了createDownloadStream方法,就會直接返回createDownloadStream的結果,而不會繼續進行下面的download操做。
    也就是說,咱們只須要定義createDownloadStream方法便可

const params = { Bucket: this.bucket, Key: trimKey(key) };
    logger.syncInfo(`進入aws->createDownloadStream key=${key} trimKey=${trimKey(key)}`);
    return this.client.getObject(params).createReadStream();
複製代碼

編寫NPM測試腳本

設置npm源爲剛搭建的私有源
npm config set registry http://registry.npm.my.com 

查看當前的registry地址
npm get registry

清理npm緩存
npm cache clean --force 

隨便選一個項目 刪除node_modules包
rm -rf node_modules

安裝
npm install

手動同步一個包,好比react(能夠在web界面上的/sync/路徑下輸入包名進行同步)
npm sync react
複製代碼

只是手動安裝一個項目的依賴包可能沒法說明什麼,咱們來寫一個簡單的自動測試腳本

require('shelljs/global')

const logger = require('./log').logger;
const fs = require('fs');
const MODULE_DIR = '/node_modules';
const PARENT_PATH = '/Users/sunxiuguo/project/';
const projectName = [
    'test1',
    'test2',
    'test3',
    'test4',
]
const absolutePath = projectName.map(item => {
    return {
        modulesPath: PARENT_PATH + item + MODULE_DIR,
        parentPath: PARENT_PATH + item,
    }
});

const startTime = new Date('2018/11/06 21:00:000').getTime();
const endTime = new Date('2018/11/08 10:00:000').getTime();

/**
 * 讀取路徑
 * @param path
 */
function getStat(path){
    if (exec(`cd ${path}`).code == 0) {
        return true;
    }
    return false;
}

async function npmCachecleanAndInstall(projectPath) {
    cd(projectPath);
    logger.info(`cd ${projectPath}`);
    exec('pwd');
    await execAndLogAsync(`npm cache clean --force`);
    await execAndLogAsync(`npm install --registry=http://registry.npm.my.com`)
}

async function execAndLogAsync(command) {
    logger.info(command);
    let result = await exec(command);
    if (result.stderr) {
        logger.error(result.stderr);
    }
}

async function install(path) {
    logger.info(`install: path = ${JSON.stringify(path)}`);
    let isExists = getStat(path.modulesPath);
    if (!isExists) {
        // 若是不存在 npm install
        logger.info(`install: 不存在${path.modulesPath}目錄,開始npm install`)
        await npmCachecleanAndInstall(path.parentPath);
    } else {
        // 若是存在,刪除 && npm install
        logger.info(`install: 存在${path.modulesPath}目錄,開始刪除`)
        await execAndLogAsync(`rm -rf ${path.modulesPath}`);
        logger.info(`install: 刪除${path.modulesPath}成功,開始npm install`)
        await npmCachecleanAndInstall(path.parentPath);
    }
}

logger.info('beginning!')

if (new Date().getTime() < startTime) {
    logger.info(`未到開始時間, 開始時間爲2018/11/06 22:00:000`)
    exit(1);
}

for(let path of absolutePath) {
    (async function(){
        while (new Date().getTime() < endTime) {
            await install(path);
        }
    })()
}
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來發佈一個包吧!

首先添加一個用戶,添加後會默認以這個用戶登陸
npm adduser
username:sunxiuguo
password:sunxiuguo
email:sunxiuguo1@qq.com

進入要發佈的目錄
npm publish

查看剛纔發佈的包信息(也能夠在web界面上查詢)
npm view moduleName

這時若是其餘小夥伴也要發佈這個包,就會報錯了,由於其餘小夥伴不是這個包的maintainer
我們來查看一下這個包的owner都有誰
npm owner ls moduleName

而後添加wangwang爲這個包的owner
npm owner add wangwang moduleName

什麼?!!又報錯了?!
不要慌,那是由於根本沒有wangwang這個用戶,須要執行npm adduser添加一下
npm adduser
username:wangwang
password:1231131313
email:wangwang@guazi.com

再次添加owner
npm owner add wangwang moduleName

成功了!今後wangwang也能夠發佈這個包了

之後若是想登陸,直接Login便可
npm login
username:wangwang
password:1231131313
email:wangwang@guazi.com
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若是想撤銷發佈一個包怎麼辦?

強調一下,撤銷發佈包是很危險的一件事情,若是有其餘同窗用了你的包,而後你心血澎湃地把這個包撤銷了??其餘同窗確定一臉問號
npm unpublish moduleName
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  1. 根據規範,只有在發包的24小時內才容許撤銷發佈的包( unpublish is only allowed with versions published in the last 24 hours)
  2. 即便你撤銷了發佈的包,發包的時候也不能再和被撤銷的包的名稱和版本重複了(即不能名稱相同,版本相同,由於這二者構成的惟一標識已經被「佔用」了)
若是你再也不維護你發佈的moduleA了,可使用下面這個命令
這個命令並不會撤銷已發佈的包,只是會在其餘人用的你的包時收到警告
npm deprecate moduleA
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NPM包的版本應該怎麼維護?

版本格式:主版號.次版號.修訂號,版號遞增規則以下:
主版號:當你作了不相容的API 修改,
次版號:當你作了向下相容的功能性新增,
修訂號:當你作了向下相容的問題修正,好比修復了一個bug。

改變當前package的版本號,update_type爲patch, minor, or major其中之一,分別表示修訂號,次版號,主版號
npm version <update_type>

好比當前版本號爲0.1.0
npm version patch
0.1.1
npm version minor
0.2.0
npm version major
1.0.0
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我都踩過哪些坑?

  • docker中npm install -g報錯
Error: could not get uid/gid
[ 'nobody', 0 ]
    at /usr/lib/node_modules/npm/node_modules/uid-number/uid-number.js:37:16
    at ChildProcess.exithandler (child_process.js:205:5)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:891:16)
    at Socket.<anonymous> (internal/child_process.js:342:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at Pipe._handle.close [as _onclose] (net.js:497:12)
    
    在全局安裝前執行下面這條命令便可
    npm config set unsafe-perm true

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  • nodejs.ErrorException: Error: stream.push() after EOF
清一下緩存
npm cache clean --force
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  • publish成功了,可是install失敗,報錯shanumNotMatch,unexpected end of file
這個問題我本身的狀況是,在controllers/utils.js裏,調用nfs.download方法,writeStream尚未寫完,就開始了readStream而且清理了臨時路徑,致使文件被截斷了,因此必定要注意異步的問題,而且調試的時候儘可能寫好try catch和日誌,方便之後定位問題。  
固然也能夠直接定義一個createDownloadStream方法,直接返回可讀流給body。
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期間還踩過好多好多坑,遺憾的是忘記記錄下來了....

以上是在下關於npm私服搭建的一點拙見,若有不足,望諸位客官多多指正。

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