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Provides an API for http connectivity functionality for thundr projects.

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/*
 * This file is a component of thundr, a software library from 3wks.
 * Read more: http://3wks.github.io/thundr/
 * Copyright (C) 2015 3wks, 
 *
 * 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;

import java.net.HttpCookie;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang3.StringUtils;

import com.threewks.thundr.logger.Logger;

public abstract class BaseHttpResponse> implements HttpResponse {
	private static Pattern charsetPattern = Pattern.compile(".*?charset=([^;,\\s]+).*");
	protected BaseHttpService httpService;

	public BaseHttpResponse(BaseHttpService httpService) {
		this.httpService = httpService;
	}

	@Override
	public  T getBody(Class as) {
		return httpService.convertIncoming(getBodyAsStream(), as);
	}

	/**
	 * Safely parse a cookie header. If any exceptions are encountered then the exception is caught
	 * and an empty list is returned.
	 * 
	 * @param setCookieHeader the header to parse.
	 * @return a list of cookies, or an empty list if anything goes wrong parsing the header.
	 */
	protected List parseCookies(String setCookieHeader) {
		List cookies = new ArrayList();

		if (StringUtils.isNotBlank(setCookieHeader)) {
			try {
				cookies = HttpCookie.parse(setCookieHeader);
			} catch (Exception e) {
				try {
					// old version of java (<7) fail for cookies with HttpOnly present, we'll strip that out and try again
					cookies = HttpCookie.parse(setCookieHeader.replaceAll("(?i);\\s*HttpOnly", ""));
				} catch (Exception e2) {
					Logger.warn("Unable to parse cookie from header '%s': %s", setCookieHeader, e2.getMessage());
				}
			}
		}
		return cookies;
	}

	protected String getCharset() {
		String fullContentType = getContentType();

		if (fullContentType != null) {
			Matcher matcher = charsetPattern.matcher(fullContentType);
			if (matcher.matches()) {
				return matcher.group(1);
			}
		}
		return "UTF-8";

	}
}