/// <summary>
/// Matches the supported media types against the list of media types specified in the Accept header or ContentType header of the message. Matching follows the
/// rules for media type matching as described in RFC 2616.
/// </summary>
/// <param name="sourceTypes">The set of media types to be matched against the <paramref name="targetTypes"/>.</param>
/// <param name="targetTypes">The set of media types the <paramref name="sourceTypes"/> will be matched against.</param>
/// <returns>The best <see cref="MediaTypeMatchInfo"/> found during the matching process or null if no match was found.</returns>
private static MediaTypeMatchInfo MatchMediaTypes(IEnumerable <MediaType> sourceTypes, MediaType[] targetTypes)
{
Debug.Assert(sourceTypes != null, "sourceTypes != null");
Debug.Assert(targetTypes != null, "targetTypes != null");
MediaTypeMatchInfo selectedMatchInfo = null;
int sourceIndex = 0;
if (sourceTypes != null)
{
foreach (MediaType sourceType in sourceTypes)
{
int targetIndex = 0;
foreach (MediaType targetType in targetTypes)
{
// match the type name parts and parameters of the media type
MediaTypeMatchInfo currentMatchInfo = new MediaTypeMatchInfo(sourceType, targetType, sourceIndex, targetIndex);
if (!currentMatchInfo.IsMatch)
{
targetIndex++;
continue;
}
if (selectedMatchInfo == null)
{
selectedMatchInfo = currentMatchInfo;
}
else
{
int comparisonResult = selectedMatchInfo.CompareTo(currentMatchInfo);
if (comparisonResult < 0)
{
// If the selected match is less specific than the current match, use the current match.
selectedMatchInfo = currentMatchInfo;
}
}
targetIndex++;
}
sourceIndex++;
}
}
if (selectedMatchInfo == null)
{
return(null);
}
return(selectedMatchInfo);
}
private static MediaTypeMatchInfo MatchMediaTypes(IEnumerable <MediaType> sourceTypes, MediaType[] targetTypes)
{
MediaTypeMatchInfo info = null;
int sourceIndex = 0;
if (sourceTypes != null)
{
foreach (MediaType type in sourceTypes)
{
int targetIndex = 0;
foreach (MediaType type2 in targetTypes)
{
MediaTypeMatchInfo other = new MediaTypeMatchInfo(type, type2, sourceIndex, targetIndex);
if (!other.IsMatch)
{
targetIndex++;
}
else
{
if (info == null)
{
info = other;
}
else if (info.CompareTo(other) < 0)
{
info = other;
}
targetIndex++;
}
}
sourceIndex++;
}
}
if (info == null)
{
return(null);
}
return(info);
}
