GET http://localhost:8100/search/aq?query=s 404 (Not Found)

Hi dear frineds i have a problem with ionic 2 CORS. I am getting this error.

my ionic.config.json
{
“name”: “weatherapp”,
“app_id”: “”,
“v2”: true,
“typescript”: true,
“proxies”: [
{
“path”: “/api”,
“proxyUrl”: “http://api.wunderground.com/api
},
{
“path”:"/search",
“proxyUrl”: “http://autocomplete.wunderground.com
}
]
}

my weather.service.ts
import {Injectable, Inject} from ‘@angular/core’;
import {Http} from ‘@angular/http’;
import {Observable} from ‘rxjs/Observable’;
import ‘rxjs/Rx’;

@Injectable()
export class WeatherService {
        http: any;
        searchUrl: any;
        apiKey: string;
        conditionsUrl: string;
    static get parameters(){
        return [Http];
    }

    constructor(http){
        this.http = http;
        console.log('Service Connected : )');
        this.apiKey = '1e4420a89011eef4';
        this.conditionsUrl= 'http://api.wunderground.com/api/'+this.apiKey+'/conditions/q';
        this.searchUrl='http://localhost:8100/search/aq?query=';
    }

    getWeather(city, state){
        return this.http.get(this.conditionsUrl+'/'+state+'/'+city+'.json')
        .map(res => res.json());
    }

     searchCities(searchStr){
        return this.http.get(this.searchUrl+''+searchStr)
           .map(res => res.json());
    }
}

my weather.ts
import { Component } from ‘@angular/core’;
import { NavController } from ‘ionic-angular’;
import { OnInit } from ‘@angular/core’;
import { WeatherService } from ‘…/…/services/weather.service’;

@Component({
  selector: 'page-weather',
  templateUrl: 'weather.html',
  providers: [WeatherService]
})
export class WeatherPage {
    results: any;
    searchStr: any;
    weather: any;
    state: string;
    city: string;

  weatherService : WeatherService;
  static get parameters(){
    return [[WeatherService]];
  }

  constructor(weatherService) {
    this.weatherService = weatherService;
    this.city = 'Istanbul';
    this.state = '';
    this.searchStr;
    this.weather;
    this.results;
  }

  ngOnInit(){
    this.weatherService.getWeather(this.city, this.state)
    .subscribe(weather => {
      //console.log(weather);,
      this.weather = weather.current_observation;
    })
  }

  getQuery(){
        this.weatherService.searchCities(this.searchStr)
    .subscribe(res => {
      //console.log(weather);
      this.results = res.RESULTS
     console.log(this.results);
    })
  }
}

and my weather.html

I could not find my fault where it is. I want your help. Thanks in advance.