Angular HttpClient ResponseTyp错误 [英] Angular HttpClient ResponseTyp Error
本文介绍了Angular HttpClient ResponseTyp错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我尝试从api下载图片(png).我的问题是,由于某种原因,ionic/angular仅接受json文件.
I try to download an image(png) from a api. My problem is, that for some reason only json files are accepted by ionic/angular.
return this.http.get(this.authKeys.serverURL, {headers: this.header, responseType: ResponseContentType.Blob});
发生以下错误:
Argument of type '{ headers: any; responseType: ResponseContentType.Blob; }' is not assignable to parameter of type '{ headers?: HttpHeaders | { [header: string]: string | string[]; }; observe?: "body"; params?: Ht...'. Types of property 'responseType' are incompatible. Type 'ResponseContentType.Blob' is not assignable to type '"json"'.
由于某种原因,只允许返回json类型的响应...
For some reason only a response of type json is allowed...
推荐答案
responseType
保存字符串值.因此,您应该传递这两个值
responseType
holds string value. So you should be passing either of these values
'arraybuffer' | 'blob' | 'json' | 'text';
在较早版本的Angular 2中,该API旨在预期responseType
,
In earlier version Angular 2, it API was designed to expect enum value for responseType
, check here
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