I am working with Volley, I want to make request to a server which returns me a JSON in the "vissible layer" (I can see it in the web browser). My problem is that the server also returns my in the headers information that I need to get in my App, but I am not able to get the headers from the request.
I have searched a long time but I havent found anything usefull (Onlye adding data to the request Header, but not getting data from the header´s response)
Anyone knows how to implement that?
To get the headers you need to override parseNetworkResponse() in your request.
for example the JsonObjectRequest:
public class MetaRequest extends JsonObjectRequest {
public MetaRequest(int method, String url, JSONObject jsonRequest, Response.Listener
<JSONObject> listener, Response.ErrorListener errorListener) {
super(method, url, jsonRequest, listener, errorListener);
}
public MetaRequest(String url, JSONObject jsonRequest, Response.Listener<JSONObject>
listener, Response.ErrorListener errorListener) {
super(url, jsonRequest, listener, errorListener);
}
@Override
protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
try {
String jsonString = new String(response.data,
HttpHeaderParser.parseCharset(response.headers, PROTOCOL_CHARSET));
JSONObject jsonResponse = new JSONObject(jsonString);
jsonResponse.put("headers", new JSONObject(response.headers));
return Response.success(jsonResponse,
HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JSONException je) {
return Response.error(new ParseError(je));
}
}
}
This is an example to work with JSONArray data and headers.
First create your own custom request type implementation:
public class JsonRequest extends JsonObjectRequest {
public JsonRequest(int method, String url, JSONObject jsonRequest, Response.Listener
<JSONObject> listener, Response.ErrorListener errorListener) {
super(method, url, jsonRequest, listener, errorListener);
}
@Override
protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
try {
String jsonString = new String(response.data,
HttpHeaderParser.parseCharset(response.headers, PROTOCOL_CHARSET));
JSONObject jsonResponse = new JSONObject();
jsonResponse.put("data", new JSONArray(jsonString));
jsonResponse.put("headers", new JSONObject(response.headers));
return Response.success(jsonResponse,
HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JSONException je) {
return Response.error(new ParseError(je));
}
}
}
and in your request code:
JsonRequest request = new JsonRequest
(Request.Method.POST, URL_API, payload, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray data = response.getJSONArray("data");
JSONObject headers = response.getJSONObject("headers");
} catch (JSONException e) {
Log.e(LOG_TAG, Log.getStackTraceString(e));
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(LOG_TAG, Log.getStackTraceString(error));
}
});
See more information about implementing your own custom request in the Volley documentation Implementing a Custom Request.
