Heroku TypeError：路径必须是绝对路径或将根目录指定为res.sendFile

如何解决Heroku TypeError：路径必须是绝对路径或将根目录指定为res.sendFile

我有以下问题。更新仪表板页面时，我在Heroku上始终收到此错误消息。我在App.tsx中使用react-router，并且Dashboard Route是“受保护的路由”。我也有一个登录路线。如果您还没有jwt令牌，将首先调用它。此后，如果登录成功并且您已经具有jwt令牌，那么您将被重定向到仪表板，然后您将被直接重定向到仪表板。下面是代码。

我的问题： 刷新仪表板时，出现以下错误：Internal Server Error 对于Heroku，它看起来像这样：

 2020-09-21T15:23:42.881152+00:00 app[web.1]: [[32minfo[39m]: 2020-09-21T15:23:42.880Z: /dashboard
2020-09-21T15:23:42.886899+00:00 app[web.1]: TypeError: path must be absolute or specify root to res.sendFile
2020-09-21T15:23:42.886900+00:00 app[web.1]:     at ServerResponse.sendFile (/app/node_modules/express/lib/response.js:425:11)
2020-09-21T15:23:42.886901+00:00 app[web.1]:     at /app/build/index.js:50:9
2020-09-21T15:23:42.886901+00:00 app[web.1]:     at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5)
2020-09-21T15:23:42.886902+00:00 app[web.1]:     at next (/app/node_modules/express/lib/router/route.js:137:13)
2020-09-21T15:23:42.886902+00:00 app[web.1]:     at Route.dispatch (/app/node_modules/express/lib/router/route.js:112:3)
2020-09-21T15:23:42.886902+00:00 app[web.1]:     at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5)
2020-09-21T15:23:42.886903+00:00 app[web.1]:     at /app/node_modules/express/lib/router/index.js:281:22
2020-09-21T15:23:42.886903+00:00 app[web.1]:     at param (/app/node_modules/express/lib/router/index.js:354:14)
2020-09-21T15:23:42.886904+00:00 app[web.1]:     at param (/app/node_modules/express/lib/router/index.js:365:14)
2020-09-21T15:23:42.886904+00:00 app[web.1]:     at Function.process_params (/app/node_modules/express/lib/router/index.js:410:3)
2020-09-21T15:23:42.886904+00:00 app[web.1]:     at next (/app/node_modules/express/lib/router/index.js:275:10)
2020-09-21T15:23:42.886904+00:00 app[web.1]:     at SendStream.error (/app/node_modules/serve-static/index.js:121:7)
2020-09-21T15:23:42.886905+00:00 app[web.1]:     at SendStream.emit (events.js:315:20)
2020-09-21T15:23:42.886905+00:00 app[web.1]:     at SendStream.error (/app/node_modules/send/index.js:270:17)
2020-09-21T15:23:42.886905+00:00 app[web.1]:     at SendStream.onStatError (/app/node_modules/send/index.js:421:12)
2020-09-21T15:23:42.886906+00:00 app[web.1]:     at next (/app/node_modules/send/index.js:735:16)

我的代码：

App.tsx

  return (
    <div className="App">
      <Router>
        <Switch>
          <Route exact path="/" component={Login} />
          <ProtectedRoute path="/dashboard" component={Dashboard} />
          <Route component={NoMatch} />
        </Switch>
      </Router>
    </div>
  );
}

LoginPage.tsx：

const loginClick = () => {
   axios.post('/api/users/auth',{
       email: email,password: password
  }).then(res => {
       localStorage.setItem("jwt-token",res.data.token);
       history.push("/dashboard")
     })
 }

 <React.Fragment>
    {isAuthenticated() ? <Redirect to="/dashboard" /> :
       <div>
        <TextField
         variant="outlined"
         required
         label="Email Address"
         name="email"
         autoComplete="email"
         autoFocus
         onChange={handleEmailChange}
       />
       </div>
       <div>
       <TextField
        variant="outlined"
        required
        name="password"
        label="Password"
        type="password"
        id="password"
        autoComplete="current-password"
        onChange={handlePasswordChange}
       />
      </div>
      <div style={{ marginTop: 30 }}>
        <Button
          onClick={() => loginClick()}
          variant="contained"
          style={{ color: "white",backgroundColor: COLORS.primary }}
        >
          Anmelden
        </Button>
      </div>
     }
   </React.Fragment >

index.ts（后端）：

import mongoose from "mongoose";
import express,{ Application,Request,Response,NextFunction } from "express";
import path from "path";
import tableData from "./api/tableData";
import tasks from "./api/tasks";
import companyName from "./api/companyNames";
import legalForm from "./api/legalForm";
import user from "./api/user"
import compression from "compression";
import logger from "./utils/logger";
import dotenv from "dotenv";
import bodyParser from "body-parser";
import http from "http";
import https from "https"

const loggingMiddleware = (req: Request,res: Response,next: NextFunction) => {
  logger.info(`${new Date().toISOString()}: ${req.originalUrl}`);
  next();
};

dotenv.config();

const app: Application = express();

const port = process.env.PORT || process.env.PORT_DEV;

const url =
  process.env.MONGO_DB_MASTER ||
  process.env.MONGO_DB_STAGING ||
  process.env.MONGO_DB_LOCAL;

http.globalAgent.maxSockets = Infinity;
https.globalAgent.maxSockets = Infinity;

app.use(loggingMiddleware);

//app.use(express.static(__dirname + '/public',{ maxAge: 31557600 }));

app.set("query parser","simple")

app.use(compression());

app.use(bodyParser.json());

mongoose
  .connect(`${url}`,{
    useNewUrlParser: true,useUnifiedTopology: true,useFindAndModify: true,useCreateIndex: true,})
  .then(() => logger.info("Database Connected Successfully"))
  .catch((err) => logger.error(`Database Connection Error ${err}`));

app.use("/api",[tableData,tasks,companyName,legalForm,user]);

app.use(express.static(path.join("client/build")));

app.get("*",(req: Request,res: Response) => {
  //res.setHeader('Cache-Control','public,max-age=86400')
  res.sendFile(path.join("client/build/index.html"));
  logger.info(__dirname);
});

app.listen(port,() => {
  logger.info(`Server is running on port ${port}`);
});

filesystem