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Free open-source Java API for Redmine and Chiliproject bug/task management systems. This project was originally a part of Task Adapter application (http://www.taskadapter.com) and then was open-sourced.

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package com.taskadapter.redmineapi.internal.comm;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

class HttpUtil {

	/**
	 * Returns entity encoding.
	 * 
	 * @param entity
	 *            entitity to get encoding.
	 * @return entity encoding string.
	 */
	public static String getEntityEncoding(HttpEntity entity) {
		final Header header = entity.getContentEncoding();
		if (header == null)
			return null;
		return header.getValue();
	}

	/**
	 * Returns entity charset to use.
	 * 
	 * @param entity
	 *            entity to check.
	 * @return entity charset to use in decoding.
	 */
	public static String getCharset(HttpEntity entity) {
		final String guess = EntityUtils.getContentCharSet(entity);
		return guess == null ? HTTP.DEFAULT_CONTENT_CHARSET : guess;
	}
}