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#ifndef __KINGATE_HEADERS_H
#define __KINGATE_HEADERS_H

#include <string>
#include <map>
#include <ostream>

/**
 * @file
 * @brief the headers -- HTTP headers container class.
 */

namespace kingate {
    using namespace std;

    /**
     * The container class for HTTP headers.
     */
    class headers : public multimap<string,string> {
	public:

	    /**
	     * Reference header if one exists.
	     * @param k the header.
	     * @return reference to the content.
	     */
	    const mapped_type& operator[](const key_type& k) const {
		return get_header(k);
	    }
	    /**
	     * Reference header, creating one if needed.
	     * @param k the header.
	     * @return reference to the content.
	     */
	    mapped_type& operator[](const key_type& k) {
		return get_header(k);
	    }

	    /**
	     * Set HTTP header. Remove all existent occurences of headers with
	     * this name.
	     * @param h header name.
	     * @param c header content.
	     */
	    void set_header(const key_type& h,const mapped_type& c);
	    /**
	     * Add HTTP header.
	     * @param h header name.
	     * @param c header content.
	     */
	    void add_header(const key_type& h,const mapped_type& c);
	    /**
	     * Remove named header.
	     * @param h header name.
	     */
	    void unset_header(const key_type& h);
	    /**
	     * Return const reference to the existing header.
	     * @param h header name.
	     * @return reference to header content.
	     */
	    const mapped_type& get_header(const key_type& h) const;
	    /**
	     * Return reference to the header, creating one if needed.
	     * @param h header name.
	     * @return reference to the content.
	     */
	    mapped_type& get_header(const key_type& h);
	    /**
	     * Return the range of headers with a certain name.
	     * @param h header name.
	     * @return pair of const iterators with the beginning and the end
	     * of range.
	     */
	    pair<const_iterator,const_iterator> get_headers(const key_type& h) const;
	    /**
	     * Return the range of headers with a certain name.
	     * @param h header name.
	     * @return pair of iterators with the beginning and the end
	     * of range.
	     */
	    pair<iterator,iterator> get_headers(const key_type& h);
	    /**
	     * Inquire whether the named header exists.
	     * @param h header name.
	     * @return true if exists.
	     */
	    bool has_header(const key_type& h) const;

    };

}

#endif /* __KINGATE_HEADERS_H */