express無法接收到angular4中http.post過來的參數(shù),試了好多方法都不管用，req中始終拿不到參數(shù)。代碼如下：

var express = require('express');
var request = require('request');
var bodyParser = require('body-parser');
var multer = require('multer');
var upload = multer({ dest: 'uploads/' })
var app = express();

app.use(bodyParser.json()); // for parsing application/json
app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-

app.get('/', (request, response) => response.send('這里是首頁'));

app.post('/api/login', (req, resq) => {
    console.log(req)
    var userName = "";
    var password= "";
    request('http://localhost:8080/login?code='+userName+"&password=1", {form:{'code': userName, 'password':password}}, function (error, response, body) {
        console.log(body)
        resq.send(body);
        resq.end();
    });

});

app.get("*", (request, response) => response.end("404!"));

const server = app.listen(3000, 'localhost', () => {
    var host = server.address().address;
    var port = server.address().port;

    console.log('Example app listening at http://%s:%s', host, port);
});

angular的代碼如下：

login(info: any) {

    var headers = new HttpHeaders();
    headers.append('Content-Type', 'application/x-www-form-urlencoded');
    
    let params = new HttpParams();
    params.set('userName', info.userName)
    params.set('password', info.password)

    this.httpClient.post('http://localhost:3000/api/login',params).subscribe(
      (val) => {
        console.log("POST call successful value returned in body",
          val);
      },
      response => {
        console.log("POST call in error", response);
      },
      () => {
        console.log("The POST observable is now completed.");
      });
  }