问题
I would like to copy a REST response into a blob but I am unable to do some because blob()
and arrayBuffer()
have not yet been implemented in the Response Object. The Response Body is a private variable.
...
return this.http.get(url, {params: params, headers: headers})
.map(res => {
// can't access _body because it is private
// no method appears to exist to get to the _body without modification
new Blob([res._body], {type: res.headers.get('Content-Type')});
})
.catch(this.log);
...
Is there a solution I can use until these methods get implemented?
回答1:
There's a much simpler solution to accessing the body as a string which I haven't seen documented anywhere:
let body = res.text()
回答2:
Addon to @StudioLE. You may use json() method to return data as json.
let body = res.json()
回答3:
Since I found this question while running into the same problem (and Angular's documentation is not updated as of today) you can now use:
let blob = new Blob([response.arrayBuffer()], { type: contentType });
Another workaround if you for some reason are on an old version of Angular 2 is:
let blob = new Blob([(<any> response)._body], { type: contentType });
回答4:
set the responseType of requestoptions. That will make the response.blob() method work.
let headers = this.getAuthorizationHeader();
headers.append("Accept", "application/octet-stream");
return this.http
.get(url, new RequestOptions({ headers: headers, responseType: ResponseContentType.Blob }))
.map((res: Response): Blob => {
return res.ok ? res.blob() : undefined;
});
回答5:
I can't see no other solutions before the following PR is merged:
- https://github.com/angular/angular/pull/7260
Whereas you have a compilation error, the field can be used at runtime...
来源:https://stackoverflow.com/questions/36087145/how-can-i-get-access-to-the-angular-2-http-response-body-without-converting-it-t