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package org.apache.juneau.http;

import org.apache.juneau.http.annotation.*;

/**
 * Represents a parsed <l>Accept-Range</l> HTTP response header.
 *
 * <p>
 * What partial content range types this server supports via byte serving.
 *
 * <h5 class='figure'>Example</h5>
 * <p class='bcode w800'>
 * 	Accept-Ranges: bytes
 * </p>
 *
 * <h5 class='topic'>RFC2616 Specification</h5>
 *
 * The Accept-Ranges response-header field allows the server to indicate its acceptance of range requests for a
 * resource:
 * <p class='bcode w800'>
 * 	Accept-Ranges     = "Accept-Ranges" ":" acceptable-ranges
 * 	acceptable-ranges = 1#range-unit | "none"
 * </p>
 *
 * <p>
 * Origin servers that accept byte-range requests MAY send...
 * <p class='bcode w800'>
 * 	Accept-Ranges: bytes
 * </p>
 * <p>
 * ...but are not required to do so.
 *
 * <p>
 * Clients MAY generate byte-range requests without having received this header for the resource involved.
 *
 * <p>
 * Range units are defined in section 3.12.
 *
 * <p>
 * Servers that do not accept any kind of range request for a resource MAY send...
 * <p class='bcode w800'>
 * 	Accept-Ranges: none
 * </p>
 * <p>
 * ...to advise the client not to attempt a range request.
 *
 * <ul class='seealso'>
 * 	<li class='extlink'>{@doc RFC2616}
 * </ul>
 */
@Header("Accept-Ranges")
public final class AcceptRanges extends HeaderString {

	/**
	 * Returns a parsed <c>Accept-Ranges</c> header.
	 *
	 * @param value The <c>Accept-Ranges</c> header string.
	 * @return The parsed <c>Accept-Ranges</c> header, or <jk>null</jk> if the string was null.
	 */
	public static AcceptRanges forString(String value) {
		if (value == null)
			return null;
		return new AcceptRanges(value);
	}

	private AcceptRanges(String value) {
		super(value);
	}
}
