Http拦截器Angular 4

Question

我在使用 Angular 4 框架的 Typescript 文件中遇到错误。 IntelliJ IDE 无法识别 HttpRequest 的任何数据类型。

代码如下：

import {Component, Injectable, OnInit} from '@angular/core';
import 'rxjs/add/operator/map';
import 'rxjs/add/observable/of';
import { Http, Response } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import {ActivatedRoute, Router} from "@angular/router";
import {
  HttpClient, HttpErrorResponse, HttpEvent, HttpHandler, HttpHeaders, HttpRequest,
  HttpResponse, HttpInterceptor, HttpEventType} from "@angular/common/http";
import * as $ from "jquery";

@Injectable()
export class Service {

public getNames() {

   intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
       if (request.responseType == 'json') {
       request = request.clone({ responseType: 'text' });

       return next.handle(req).map(response => {
         if (response instanceof HttpResponse) {
         response = response.clone<any>({ body: JSON.parse(response.body) });
      }

      return response;
    });
  }
}

来自以下 GitHub 网站：https://github.com/angular/angular/issues/18396#issuecomment-349403045

我检查了我正在导入“@angular/common/http”，并且我的 Typescript 版本是最新的（我有 2.6.2 版）。

有谁知道如何解决这个问题？ 任何建议将不胜感激。

谢谢。

Answer 1

使用拦截器的正确方法是这样的：

import {
  Injectable,
} from '@angular/core';
import {
  HttpRequest,
  HttpHandler,
  HttpEvent,
  HttpInterceptor
} from '@angular/common/http';
import {
  Observable
} from 'rxjs/Observable';

@Injectable()
export class MyInterceptor implements HttpInterceptor {
  constructor() {
  }

  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    if (request.responseType == 'json') {
      request = request.clone({ responseType: 'text' });
    }

    return next.handle(request).map(// your code here)
  }
}

找出你的代码的不同之处。