节点 js 停止处理来自 angular 的多个 api 请求并在重新启动节点应用程序后工作

Question

我正在用 node express js 和 angular js 开发一个应用程序。我的 angular 应用程序在每次路由或按钮单击时从节点 js 应用程序服务器发出 api 请求，而且单个组件或按钮单击可能会向节点 js 应用程序请求多个 api。多次请求后，数据加载刚刚停止，我没有得到结果。还获取状态代码，如 304 和 204。

请查看我的api代码并订阅服务代码。

constroller.js ///express js

  getList: async (req, res) => {
    try{
      const result = await getList(); //from service.js (an sql query)
     
      var serviceCalls = result[0][0];
      return res.set({'Content-Type': 'application/json'}).status(200).json({
        success: 1,
        message: 'Successfully Data Fetched',
        data: serviceCalls
      });
    } catch(e){
      return res.json({
        success: 0,
        message: 'No Data Fetched' + ' ' + e.message,
        data: {}
      });
    }
    },
  
  getDetails: async (req, res) => {
    try{
      const id = req.query.id
      const result = await getDetails(id); //from service.js (an sql query)
      var serviceCalls = result[0][0];
      return res.set({'Content-Type': 'application/json'}).status(200).json({
        success: 1,
        message: 'Successfully Data Fetched',
        data: serviceCalls
      });
    } catch(e){
      return res.json({
        success: 0,
        message: {text:'No Data Fetched ', errMsg: e.message},
        data: {}
      });
    }
    },

  getTroubles: async (req, res) => {
      try{
        const id = req.query.id
        const result = await getTroubles(id); //from service.js (an sql query)
        var complaintData = result[0][0];
          
        return res.set({'Content-Type': 'application/json'}).status(200).json({
          success: 1,
          message: 'Successfully Data Fetched',
          data: complaintData
        });
      } catch(e){
        return res.json({
          success: 0,
          message: 'No Data Fetched',
          data: []
        });
      }
    },

  getLogs: async (req, res) => {
        try{
          const id = req.query.id
          const result = await getLogs(id); //from service.js (an sql query)
          var feedbackData = result[0][0];
          
          return res.set({'Content-Type': 'application/json'}).status(200).json({
            success: 1,
            message: 'Successfully Data Fetched',
            data: logs
          });
        } catch(e){
          return res.json({
            success: 0,
            message: {text:'No Data Fetched ', errMsg: e.message},
            data: []
          });
        }
    },

routes //node js express js app.js

app.use('/serviceCall', serviceCallRoute);

serviceCallRoute

router.get("/getList", getList);
router.get("/getDetails", getDetails);
router.get("/getTroubles", getTroubles);
router.get("/getLogs", getLogs);

angular subscribe to api

getServiceCalls() {
    return this.http.get(url + 'serviceCall/getList',this.httpOptions)
      .pipe(
        map((res: IServiceCall) => {
          return res;
        }),
        catchError(errorRes => {
          return throwError(errorRes);
        })
      );
  }

  getServiceCallDetails(id):Observable<IServiceCall> {
    const params = new HttpParams().set('id', id);
    const headers = new HttpHeaders({ 'Content-Type': 'application/json'})
    return this.http.get(url + 'serviceCall/getDetails',{headers:headers,params: params})
      .pipe(
        map((res: IServiceCall) => {
          return res;
        }),
        catchError(errorRes => {
          return throwError(errorRes);
        })
      );
  }
  getServiceCallTroubles(id) {
    const params = new HttpParams().set('id', id);
    const headers = new HttpHeaders({ 'Content-Type': 'application/json'})
    return this.http.get<IServiceCallTroubles>(url + 'serviceCall/getTroubles',{headers:headers,params: params})
      .pipe(
        map((res: IServiceCallTroubles) => {
          return res;
        }),
        catchError(errorRes => {
          return throwError(errorRes);
        })
      );
  }
  getServiceCallLogs(id):Observable<IServiceCallLogs>{
    const params = new HttpParams().set('id', id);
    const headers = new HttpHeaders({ 'Content-Type': 'application/json'})
    return this.http.get<IServiceCallLogs>(url + 'serviceCall/getLogs',{headers:headers,params: params})
      .pipe(
        map((res: IServiceCallLogs) => {
          return res;
        }),
        catchError(errorRes => {
          return throwError(errorRes);
        })
      );
  }

Answer 1

express js 运行良好。是数据库连接限制错误。

数据库连接限制设置为 10。因此，在 10 个 api 请求和 sql 查询之后。数据库连接断开。

节点 js 停止处理来自 angular 的多个 api 请求并在重新启动节点应用程序后工作

node js stops working on multiple api request from angular and working after restarting the node app

mysql

api

rest

node.js

angularjs