public static bool IsJson()

in src/Microsoft.Extensions.Configuration.AzureAppConfiguration/Extensions/ContentTypeExtensions.cs [37:73]

• 26 lines of code
• 7 McCabe index (conditional complexity)

        public static bool IsJson(this ContentType contentType)
        {
            if (contentType == null)
            {
                return false;
            }

            string acceptedMainType = "application";
            string acceptedSubType = "json";

            ReadOnlySpan<char> mediaTypeSpan = contentType.MediaType.AsSpan();

            // Since contentType has been validated using System.Net.Mime.ContentType,
            // mediaType will always have exactly 2 parts after splitting on '/'
            int slashIndex = mediaTypeSpan.IndexOf('/');

            if (mediaTypeSpan.Slice(0, slashIndex).Equals(acceptedMainType.AsSpan(), StringComparison.OrdinalIgnoreCase))
            {
                ReadOnlySpan<char> subTypeSpan = mediaTypeSpan.Slice(slashIndex + 1);

                while (!subTypeSpan.IsEmpty)
                {
                    int plusIndex = subTypeSpan.IndexOf('+');

                    ReadOnlySpan<char> currentSubType = plusIndex == -1 ? subTypeSpan : subTypeSpan.Slice(0, plusIndex);

                    if (currentSubType.Equals(acceptedSubType.AsSpan(), StringComparison.OrdinalIgnoreCase))
                    {
                        return true;
                    }

                    subTypeSpan = plusIndex == -1 ? ReadOnlySpan<char>.Empty : subTypeSpan.Slice(plusIndex + 1);
                }
            }

            return false;
        }