Java Android Volley 访问 http 响应头字段
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Android Volley access http response header fields
提问by Sergio Serra
How can i access HTTP header fields like ETag from a response using Volley ?
With HttpUrlCoonectioni just do conn.getHeaderField("ETag")and that's it.
我如何使用 Volley 从响应中访问像 ETag 这样的 HTTP 标头字段？随着HttpUrlCoonection我只是做conn.getHeaderField("ETag")，就是这样。
Thanks
谢谢
采纳答案by diegocarloslima
You can subclass Request(or any of its subclasses) and override the parseNetworkResponsemethod:
您可以子类化Request（或其任何子类）并覆盖该parseNetworkResponse方法：
@Override
protected Response<Bitmap> parseNetworkResponse(NetworkResponse response) {
Map<String, String> responseHeaders = response.headers;
}
回答by Blaz
You can extend Requestclass. Then when you implement parseNetworkResponse(NetworkResponse response)method you can access header values in response.headers. So you can access ETag header like response.headers.get("ETag"). What I did was to then add this header value in response object like response.setETag(etag)and than I just return it in Response.success(response, null). Response object will then be delivered to deliverResponse(E response)where you can send it forward to some listener.
你可以扩展Request类。然后，当您实现parseNetworkResponse(NetworkResponse response)方法时，您可以访问response.headers. 因此，您可以访问 ETag 标头，例如response.headers.get("ETag"). 我所做的是在响应对象中添加这个标头值，response.setETag(etag)而不是我只是在Response.success(response, null). 然后响应对象将被传递到deliverResponse(E response)您可以将其转发给某个侦听器的位置。
