HttpResponseNing.java

/*
 * This file is a component of thundr, a software library from 3wks.
 * Read more: http://3wks.github.io/thundr/
 * Copyright (C) 2014 3wks, <thundr@3wks.com.au>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.threewks.thundr.http.service.ning;

import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpCookie;
import java.net.MalformedURLException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;

import com.atomicleopard.expressive.Expressive;
import com.ning.http.client.ListenableFuture;
import com.ning.http.client.Response;
import com.threewks.thundr.http.service.BaseHttpResponse;
import com.threewks.thundr.http.service.HttpException;
import com.threewks.thundr.http.service.HttpRequestException;
import com.threewks.thundr.http.service.HttpResponse;
import com.threewks.thundr.http.service.HttpResponseException;

public class HttpResponseNing extends BaseHttpResponse<HttpResponseNing> implements HttpResponse {

	private ListenableFuture<Response> future;
	private Response response;

	public HttpResponseNing(ListenableFuture<Response> listenableFuture, HttpServiceNing service) {
		super(service);
		this.future = listenableFuture;
	}

	@Override
	public int getStatus() {
		return response().getStatusCode();
	}

	@Override
	public String getContentType() {
		return response().getContentType();
	}

	@Override
	public String getHeader(String name) {
		return response().getHeader(name);
	}

	@Override
	public List<String> getHeaders(String name) {
		return response().getHeaders(name);
	}

	@Override
	public Map<String, List<String>> getHeaders() {
		return response().getHeaders();
	}

	@Override
	public HttpCookie getCookie(String cookieName) {
		for (com.ning.http.client.Cookie cookie : response().getCookies()) {
			if (cookieName.equals(cookie.getName())) {
				return NingTransformers.fromNingCookie.from(cookie);
			}
		}
		return null;
	}

	@Override
	public List<HttpCookie> getCookies(String name) {
		List<HttpCookie> cookies = new ArrayList<HttpCookie>();
		for (com.ning.http.client.Cookie cookie : response().getCookies()) {
			if (name.equals(cookie.getName())) {
				cookies.add(NingTransformers.fromNingCookie.from(cookie));
			}
		}
		return cookies.isEmpty() ? null : cookies;
	}

	@Override
	public List<HttpCookie> getCookies() {
		return Expressive.Transformers.transformAllUsing(NingTransformers.fromNingCookie).from(response().getCookies());
	}

	@Override
	public String getBody() {
		String characterEncoding = getCharset();
		try {
			return new String(getBodyAsBytes(), characterEncoding);
		} catch (UnsupportedEncodingException e) {
			throw new HttpException(e, "Failed to read body as string - character encoding '%s' not supported: %s", characterEncoding, e.getMessage());
		}
	}

	@Override
	public byte[] getBodyAsBytes() {
		try {
			return response().getResponseBodyAsBytes();
		} catch (IOException e) {
			throw new HttpResponseException(e, "Failed to get response body: %s", e.getMessage());
		}
	}

	@Override
	public InputStream getBodyAsStream() {
		try {
			return response().getResponseBodyAsStream();
		} catch (IOException e) {
			throw new HttpResponseException(e, "Failed to get response body: %s", e.getMessage());
		}
	}

	@Override
	public URI getUri() {
		try {
			return response().getUri();
		} catch (MalformedURLException e) {
			throw new HttpResponseException(e, "Uri cannot be parsed: %s", e.getMessage());
		}
	}

	private Response response() {
		if (response == null) {
			try {
				response = future.get();
				return response;
			} catch (InterruptedException e) {
				throw new HttpRequestException(e, "Failed to wait for completion of asynchronous request: %s", e.getMessage());
			} catch (ExecutionException e) {
				throw new HttpRequestException(e, "Failed to get result for asynchronous request: %s", e.getMessage());
			}
		}
		return response;
	}
}