响应正文为空，状态为200 [英] Response body is null, status is 200

问题描述

我正在使用Angular的新HttpClient进行请求.当我使用旧的http时，我的组件返回的主体文本很好，但是现在主体文本为null.我无法弄清楚，服务器正在发送它，但是我总是收到null作为正文.

I'm using Angular's new HttpClient for requests. When I was using the old http, my component returned the body text just fine, but now the body text is null. I can't figure it out, the server is sending it, but i'm always receiving null as the body.

响应的其他所有部分都正常，状态为200，等等.put和delete都希望收到一条纯文本成功消息.我也尝试过使用.body方法获取正文，该正文也返回null.

every other part of the response is normal, status 200 etc. Both the put and the delete expect a plain text success message. I have also tried using the .body method to get the body text, and that returns null as well.

服务:

constructor(private http: HttpClient) {}

    sendAllow(country, allow) {
        if (allow === 1) {
            return this.http.put(`http://${this.address}/rest/geodrop/config/` +
                                 `${country}`, { observe: 'response' });
        } else {
            return this.http.delete(`http://${this.address}/rest/geodrop/config/` +
                                    `${country}`, { observe: 'response' });
        }
    }

组件:

this.whiteListService.sendAllow(a, b)
            .subscribe(
                (response) => console.log(response),
                (error) => {
                    console.log(error);
                }
        );

推荐答案

问题是Angular期望json响应.将响应更改为键入文本，如下所示:

The problem is Angular is expecting a json response. change the response to type text like so:

return this.http.put(`http://${this.address}/rest/geodrop/config/` +
                     `${country}`, { responseType: 'text', observe: 'response' });

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