エラー504を解決するには：express.js（v 4.0.0）のゲートウェイタイムアウト？

Question

私はexpress.jsを使ってサーバーを開発しています。このサーバーは、github apiにwebhooks内のユーザーのリポジトリを取得するよう要求します。問題は、この要求の戻り値：

problem with request: timed out 
[error] { [Error: 504: Gateway Timeout] 
[error] defaultMessage: 'Gateway Timeout', 
[error] message: '504: Gateway Timeout', 
[error] code: '504' } 

マイコード：

• サービス：

  exports.getWebHooks =関数getWebHooks（githubtoken、arrRepos）{

  var promise = new Hope.Promise(); 
  
  var arrReposDef = []; 
  
  var github = new GitHubApi({ 
      version: "3.0.0", 
      debug: true, 
      protocol: "https", 
      host: "api.github.com", // should be api.github.com for GitHub 
      timeout: 5000, 
      headers: { 
       "user-agent": "Meanstack" // GitHub is happy with a unique user agent 
      } 
  }); 
  
  
  github.authenticate({ 
      type: "oauth", 
      token: githubtoken.token 
  }); 
  
  
  async.each(arrRepos, 
  
      function(item, callback){ 
       // It runs well 
  
       github.repos.getHooks({ 
  
        user: githubtoken.username, 
        repo: item.name, 
  
        headers: { 
         "X-GitHub-OTP": "two-factor-code" 
        } 
  
       }, function(err, res) { 
        if (err) { // it runs wrong 2 times, this the error that I defined up. 
         console.log(err); 
         githuberror = true; 
  
        } 
  
        else{ // it runs well 2 times 
  
  
  
         if(!res.length){ 
  
          arrReposDef.push(item); 
  
  
         } 
  
         else{ 
          var enc = false; 
  
          for(var i = 0; i< res.length; i++){ 
           if(res[i].config !== undefined && res[i].config !== null){ 
            if(res[i].config.url !== undefined && res[i].config.url !== null){ 
  
  
  
             if(res[i].config.url !== config.githubcallback){ 
  
              enc = true; 
  
  
             } 
            } 
  
           } 
          } 
          if(enc) { 
  
  
           arrReposDef.push(item); 
  
  
          } 
  
  
         } 
  
  
  
        } 
        callback(); //required 
       }); 
      }, 
  
      // 3rd param is the function to call when everything's done 
      function(err){ 
  
       if(err){ 
        console.log('Error:' + err); 
        return promise.done(err,null); 
       } 
  
       // All tasks are done now 
       else{ 
  
        return promise.done(null,arrReposDef); 
  
  
       } 
      } 
  ); 
  
  return promise; 
  

  };

私はCMDのおかげで結果アプリケーションフローを知っている：

REQUEST: { host: 'api.github.com', 
    port: 443, 
    path: '/repos/1izpena/angularProject/hooks?access_token=secret', 
    method: 'get', 
    headers: 
    { host: 'api.github.com', 
    'content-length': '0', 
    'x-github-otp': 'two-factor-code', 
    'user-agent': 'Meanstack', 
    accept: 'application/vnd.github.v3+json' } } 
entro en webhooks, dentro del callback 
REQUEST: { host: 'api.github.com', 
    port: 443, 
    path: '/repos/1izpena/ionicProject/hooks?access_token=secret', 
    method: 'get', 
    headers: 
    { host: 'api.github.com', 
    'content-length': '0', 
    'x-github-otp': 'two-factor-code', 
    'user-agent': 'Meanstack', 
    accept: 'application/vnd.github.v3+json' } } 
entro en webhooks, dentro del callback 
REQUEST: { host: 'api.github.com', 
    port: 443, 
    path: '/repos/1izpena/ionicProjectDef/hooks?access_token=secret', 
    method: 'get', 
    headers: 
    { host: 'api.github.com', 
    'content-length': '0', 
    'x-github-otp': 'two-factor-code', 
    'user-agent': 'Meanstack', 
    accept: 'application/vnd.github.v3+json' } } 
entro en webhooks, dentro del callback 
REQUEST: { host: 'api.github.com', 
    port: 443, 
    path: '/repos/1izpena/RestAPI/hooks?access_token=secret', 
    method: 'get', 
    headers: 
    { host: 'api.github.com', 
    'content-length': '0', 
    'x-github-otp': 'two-factor-code', 
    'user-agent': 'Meanstack', 
    accept: 'application/vnd.github.v3+json' } } 
STATUS: 200 
HEADERS: {"server":"GitHub.com","date":"Fri, 15 Apr 2016 18:56:08 GMT","content-type":"application/json; charset=utf-8","content-length":"2","connection":"close","status":"200 OK"..."x-github-request-id":""} 
entro en webhooks, no hay errores 
entro en webhooks, en if 
STATUS: 200 
HEADERS: {"server":"GitHub.com","date":"Fri, 15 Apr 2016 18:56:08 GMT","content-type":"application/json; charset=utf-8","content-length":"2","connection":"close","status":"200 OK"...,"x-github-request-id":""} 
entro en webhooks, no hay errores 
entro en webhooks, en if 
problem with request: timed out 
[error] { [Error: 504: Gateway Timeout] 
[error] defaultMessage: 'Gateway Timeout', 
[error] message: '504: Gateway Timeout', 
[error] code: '504' } null 1izpena 
{ [Error: 504: Gateway Timeout] 
    defaultMessage: 'Gateway Timeout', 
    message: '504: Gateway Timeout', 
    code: '504' } 
problem with request: timed out 
[error] { [Error: 504: Gateway Timeout] 
[error] defaultMessage: 'Gateway Timeout', 
[error] message: '504: Gateway Timeout', 
[error] code: '504' } null 1izpena 
{ [Error: 504: Gateway Timeout] 
    defaultMessage: 'Gateway Timeout', 
    message: '504: Gateway Timeout', 
    code: '504' } 

任意のアイデア？どうもありがとう。

Answer 1

問題は、APIが応答に時間がかかりすぎるということです。これはおそらく、外部APIを呼び出すことに起因するコードのバグが原因です。ここでいくつかのコードを共有して問題を見つけることができますか？タイムアウトミドルウェアを使用すると、Webリクエストを処理するためにアプリケーションがハングアップするケースが標準化されます。

ここでは、必要に応じてレスポンスを終了するWebリクエストハンドラを更新します。

exports.auth = function auth (request, response) { 
    var userid= request.params.userid; 
    var username = request.body.username; 
    var pass = request.body.pass; 

    var arrRepos = []; 
    var usertoken = ""; 

    if(userid !== undefined && userid !== null && 
      username !== undefined && username !== null){ 

     Auth(request, response).then(function(error, result) { 
      if (error) { 
       response.status(error.code).json({message: error.message}); 
       response.end(); 
       return; 
      } 

      if (userid !== result._id){ 
       response.status(401).json({message: 'Unauthorized. You are trying to access with a different userid'}); 
       response.end(); 
       return; 
      } 

      githubapiservice.getUserToken(userid, username).then(function (error,result){ 
       if(error){ 
        response.status(error.code).json({message: error.message}); 
        response.end(); 
        return; 
       } 

       var newResult = {}; 

       if(result == null){ 

        if(pass == undefined || pass == null || pass == ''){ 
         response.status(400).json({message: 'Bad Request. Missing required parameters'}); 
         response.end(); 
         return; 
        } 

        githubapiservice.createToken(userid,username,pass).then(function (error,result){ 
         if(error){ 
          var messageJSON= JSON.parse(error.message); 
          response.status(error.code).json({message: messageJSON.message}); 
          response.end(); 
          return; 
         } 

         if(result == null){ 
          response.json({message: "No se ha conseguido el token, intentelo de nuevo más tarde"}); 
          response.end(); 
          return; 
         } 

         usertoken = result; 

         githubapiservice.saveUserToken(userid, username, result).then(function (error,result){ 
          if(error){ 
           response.status(error.code).json({message: error.message}); 
           response.end(); 
           return; 
          } 

          if(result !== null){ 

           newResult.githubtoken = result; 

           githubapiservice.getRepositories(result).then(function (error,result){ 

            if(error){ 
             if(error.code == '504'){ 
              response.status(error.code).json({message: "Gateway Timeout"}); 
              response.end(); 
             } 
             else{ 
              var messageJSON= JSON.parse(error.message); 
              response.status(error.code).json({message: messageJSON.message}); 
              response.end(); 
             } 

             return; 
            } 

            if (result === undefined || result === null || result.length === 0){ 
             newResult.arrRepos = arrRepos; 
             response.json(newResult); 
             response.end(); 
             return; 
            } 

            newResult.arrRepos = result; 

            githubapiservice.getWebHooks(newResult.githubtoken, result).then(function (error,result) { 
             if (error) { 
              var messageJSON = JSON.parse(error.message); 
              response.status(error.code).json({message: messageJSON.message}); 
             } 
             else { 
              newResult.arrRepos = result; 
              response.json(newResult); 
             } 

             response.end(); 
            }); 
           }); 

           return; 
          } 

          response.status(422).json({message: "Validation Failed"}); 
          response.end(); 
         }); 

        }); /* end create token */ 
       } else { 
        newResult.githubtoken = result; 

        githubapiservice.getRepositories(newResult.githubtoken).then(function (error, result) { 

         if(error){ 
          var messageJSON= JSON.parse(error.message); 
          response.status(error.code).json({message: messageJSON.message}); 
          response.end(); 
          return; 
         } 

         if (result === undefined || result === null || result.length === 0){ 
          newResult.arrRepos = arrRepos; 
          response.json(newResult); 
          response.end(); 
          return; 
         } 

         githubapiservice.getWebHooks(newResult.githubtoken, result).then(function (error,result) { 
          if (error) { 


           var messageJSON = JSON.parse(error.message); 
           response.status(error.code).json({message: messageJSON.message}); 
           response.end(); 
           return; 
          } 


          newResult.arrRepos = result; 

          response.json(newResult); 
          response.end(); 

         }); 
        }); 
       } 
      }); /* end getUserToken */ 

     }); 
    } else { 
     response.status(400).json({message: 'Bad Request. Missing required parameters'}); 
     response.end(); 
    } 
};