[英]How to receive file with type csv from API response
我有按一下API并以.csv类型发送响应的导出按钮。 当我点击API时,响应表示status: 200
但是我在控制台中收到HttpErrorResponse
,并收到此错误
SyntaxError: Unexpected token T in JSON at position 0 at JSON.parse (<anonymous>) at XMLHttpRequest.onLoad
我试图问我的朋友,我必须更改标题,但我不知道如何正确执行此操作。 我是否应该将令牌拦截器中的标头设置与设置标头的令牌时的设置相同(如果是,我该怎么做?)? 或者我该如何解决我的问题?
这是按钮触发的功能:
onExport = () => {
this._service.getDataExport(1, 1, this.filter).subscribe(
res => {
console.log(res);
// const filename = `MediaPreparation.csv`;
// const blob = new Blob([res.data], { type: 'text/csv' });
// saveAs(blob, filename);
},
err => console.log(err)
);
}
这是我击中的服务:
getDataExport = (page = 1, perPage = 1, filter = null): Observable<any> => {
const _url = `${this.base_url}/api/v1/media-preparation/export`;
return this.http.post(_url, {
page : page.toString(),
perPage: perPage.toString(),
filter : filter
});
}
这是令牌接收器:
import { AuthService } from './auth.service';
import { Injectable, Injector } from '@angular/core';
import { HttpInterceptor } from '@angular/common/http';
@Injectable()
export class TokenInterceptorService implements HttpInterceptor {
constructor(private injector: Injector) { }
intercept(req, next) {
const authService = this.injector.get(AuthService);
const tokenizedReq = req.clone({
setHeaders: {
Authorization: `Bearer ${authService.getToken()}`
}
});
return next.handle(tokenizedReq);
}
}
感谢您的帮助,对于不好的解释,我深感抱歉,我对Angular还是个新手。
原因很简单, HttpClient
尝试将您的响应解析为JSON,因为这是最常见的情况,也是默认操作。
为了防止HttpClient
解析您的响应,您必须在httpOptions中放入responseType: 'text'
:
private httpOptions = {
headers: new HttpHeaders({}),
responseType: 'text'
};
然后将此对象用作您的http方法的最后一个参数(我想得到get):
this.http.get(url, httpOptions)
.subscribe(res => {
// res is just a string, you have to split it on new lines and commas
// or you can use a third part library
});
注意事项 :
某些服务器可能需要添加一些非标准的Accept
标头,例如:
headers: new HttpHeader({
Accept: 'text/csv'
});
要么
headers: new HttpHeader({
Accept: 'application/csv'
});
或(标准但非语义):
headers: new HttpHeader({
Accept: 'plain/text'
});
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