[英]Parse HTTP response in Angular 7?
Server returns data in this format: {"query": 'queryName', 'result': []}
. 服务器以以下格式返回数据:
{"query": 'queryName', 'result': []}
。
I need to get only result part, for that I did this: 我只需要得到结果部分,为此我这样做了:
export class RequestInterception implements HttpInterceptor {
public constructor(private route: Router) {
}
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
return next.handle(request).do((event: HttpEvent<any>) => {
if (event instanceof HttpResponse) {
return event.body['result'];
}
}, (err: any) => {
if (err instanceof HttpErrorResponse) {
if (err.status === 401) {
this.route.navigate(['/login']);
}
return throwError('backend comm error');
}
})
};
Inside do
operator I tried this: 在
do
员里面do
我试过了:
return event.body['result'];
But it still returns me whole object instead. 但是它仍然返回我整个对象。
AppModule is: AppModule是:
providers: [
{
provide: HTTP_INTERCEPTORS,
useClass: RequestInterception,
multi: true
},
],
If you want to transform the response in the interceptor, then you can do it with a map
operator. 如果要在拦截器中转换响应,则可以使用
map
运算符进行响应。 You can also use the catchError
operator and then inside that, use throwError
in case the status code is 401
. 您还可以使用
catchError
运算符,然后在其中使用throwError
,以防状态码为401
。
Something like this: 像这样:
import { Injectable } from '@angular/core';
import {
HttpInterceptor, HttpRequest, HttpResponse,
HttpHandler, HttpEvent, HttpErrorResponse
} from '@angular/common/http';
import { Observable, throwError } from 'rxjs';
import { map, catchError } from 'rxjs/operators';
import { Router } from '@angular/router';
@Injectable()
export class InterceptorService implements HttpInterceptor {
constructor(private route: Router) { }
intercept(
req: HttpRequest<any>,
next: HttpHandler
) {
return next.handle(modified)
.pipe(
map((event: HttpResponse<any>) => {
event['body'] = event.body['result'];
return event;
}),
catchError((error: HttpErrorResponse) => {
if (error.status === 401) {
this.route.navigate(['/login']);
}
return throwError('backend comm error');
})
);
}
}
Here's a Sample StackBlitz for your ref. 这是供您参考的示例StackBlitz 。
An HttpReponse
behaves like a JSON. HttpReponse
行为类似于JSON。 For example, in order to get the body of your response
you can do the following: 例如,为了获得
response
的主体,您可以执行以下操作:
response_body = response["body"]
Of course, you have to subscribe. 当然,您必须订阅。
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