使用 rss2json“不可处理的实体"读取 Ionic 3 RSS [英] Ionic 3 RSS read with rss2json "Unprocessable Entity"

问题描述

我在使用 rrs2json API 和 Ionic 3 将 RSS 转换为 JSON 时遇到问题.如果我执行代码，它会给我错误 --> Response {_body: "{" status ":" error "," message ":"rss_url 参数是必需的."}"，状态:422，ok:false，statusText:"不可处理的实体"}

I'm having trouble converting RSS to JSON using the rrs2json API with Ionic 3. If I execute the code it gives me the error --> Response {_body: "{" status ":" error "," message ":" rss_url parameter is required."} ", Status: 422, ok: false, statusText:" Unprocessable Entity "}

代码:

noticies.ts

noticies.ts

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { RssProvider } from '../../providers/rss/rss';

@IonicPage()
@Component({
  selector: 'page-noticies',
  templateUrl: 'noticies.html',
})
export class NoticiesPage {
rssDataArray: any = [];

  constructor(public navCtrl: NavController, public navParams: NavParams, public rssProvider: RssProvider) {
  }

  ionViewDidLoad() {
    console.log('ionViewDidLoad NoticiesPage');
    this.Get_RSS_Data()
  }

  Get_RSS_Data(){
    this.rssProvider.GetRSS().subscribe(
      data => {
        this.rssDataArray = data;
        console.log(data);
      }

    );
  }
}

提供者 --> rss --> rss.ts

providers --> rss --> rss.ts

  import { Injectable } from '@angular/core';
    import {Http} from '@angular/http';
    import 'rxjs/add/operator/map';

    @Injectable()
    export class RssProvider {

      constructor(public http: Http) {
        console.log('Hello RssProvider Provider');
      }

      GetRSS(){
        const RSS_URL: any='http://rss.cnn.com/rss/edition.rss';
        const API: any='XXXXXXXXXXXXXX';
        const count: any =20;
        const API_URL: any ='https://api.rss2json.com/v1/api.json';
        const response = this.http.post(API_URL, {'rss_url': RSS_URL,'api_key': API, 'count': count}).map(res => res.json());

        return response;
      }

    }

错误 -->

错误

推荐答案

好的.我在 rss2json 服务中注册了自己，并确保该解决方案确实有效(您可以在控制台中看到数据).

Alright. I registered myself with the rss2json service and made sure this solution actually works (you can see the data in console).

您遇到的问题是您没有使用正确的方式通过 HttpParams 形成 http 请求.

The issue you have is that you are not using a proper way to form http request with HttpParams.

这是使用我的密钥的有效堆栈闪电战:https://stackblitz.com/edit/ionic-jdwqjg

Here is working stackblitz that uses my key: https://stackblitz.com/edit/ionic-jdwqjg

现在一些细节:

• 当您使用 rss2json 配置 URL 时，它基本上会向原始 URL 添加参数，例如:

https://api.rss2json.com/v1/api.json?rss_url=https%3A%2F%2Ftechcrunch.com%2Ffeed%2F&api_key=q5ijkolkdjk3urzrcfaehxeoimxr3tqbyamp;=pubDate&order_dir=asc&count=20

• 因此，在 Angular/Ionic 中，您需要利用 Angular 的 HttpParams 来正确形成请求，这是您的 HttpParams 提供程序代码:
• So in Angular/Ionic you need to leverage Angular's HttpParams to properly form request, here is your provider code with HttpParams:

提供商代码:

import { Injectable } from '@angular/core';
import { HttpClient, HttpParams } from '@angular/common/http';

@Injectable()
export class RssProvider {

  private API_URL: string;

  constructor(public http: HttpClient) {
    this.API_URL = "https://api.rss2json.com/v1/api.json";
  }

  GetRSS() {
    const params = { params: new HttpParams().set('rss_url', 'http://rss.cnn.com/rss/edition.rss').set('api_key','q5ijkolkdjk3urzrcfaehxeoimxr3tdu5ieiqcrq').set('order_by', 'pubDate').set('order_dir', 'asc')
    }
    return this.http.get(this.API_URL, params);
  }

}

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