node.js - 是什么原因导致 localhost :4200 to be added in front of route call?

Question

我正在尝试调用 API，但由于某种原因 localhost:4200 被添加到对 localhost:3000 的路由调用前面。

我多次查看了我的代码，发现另一个 API 调用与我用来执行此 API 调用的相同类型的代码运行良好。

这是我的服务:

import { Injectable } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { environment } from '../../environments/environment';

interface Tweet {
  name: string;
}

@Injectable({
  providedIn: 'root'
})
  export class TweetService {
    private url = environment.tweetsAPI;

    httpOptions = {
      headers: new HttpHeaders({'Content-Type': 'application/json'})
    };

    constructor(private http: HttpClient) {}

    getTweets() {
      console.log(this.url);
      return this.http.get(this.url);
    }
  }

这是我的路线:

app.route('/get-tweets').get((req, res) => {
  T.get('search/tweets', { q: 'iowa state since:2018-07-11 #gameday -filter:media -filter:retweets', count: 10 }, function(err, data, response) {
    let filteredTweets = [];
    _.each(data, userObj => {
      filteredTweets.push(userObj);
    })
    return res.status(200).json({
      message: 'Successfully returned tweets',
      tweets: filteredTweets
    })
  })
})

在我的environment.ts文件中:

tweetsAPI: 'http:/localhost:3000/get-tweets'

收到此错误:

ERROR HttpErrorResponse {headers: HttpHeaders, status: 404, statusText: "Not Found", url: "http://localhost:4200/localhost:3000/get-tweets", ok: false, …}

Answer 1

替换 tweetsAPI:'http://localhost:3000/get-tweets'和tweetsAPI: ' http://localhost:3000/get-tweets '