39public HttpHeaderType HeaderType => _descriptor is KnownHeader knownHeader ? knownHeader.HeaderType : HttpHeaderType.Custom; 130Debug.Assert(HeaderType != HttpHeaderType.Custom);

110: base(HttpHeaderType.Content | HttpHeaderType.Custom, HttpHeaderType.None)

57private readonly HttpHeaderType _allowedHeaderTypes; 58private readonly HttpHeaderType _treatAsCustomHeaderTypes; 61: this(HttpHeaderType.All, HttpHeaderType.None) 65internal HttpHeaders(HttpHeaderType allowedHeaderTypes, HttpHeaderType treatAsCustomHeaderTypes) 70_allowedHeaderTypes = allowedHeaderTypes & ~HttpHeaderType.NonTrailing; 71_treatAsCustomHeaderTypes = treatAsCustomHeaderTypes & ~HttpHeaderType.NonTrailing; 1165HttpHeaderType headerType = descriptor.HeaderType;

269: base(HttpHeaderType.General | HttpHeaderType.Request | HttpHeaderType.Custom, HttpHeaderType.Response)

137: base(containsTrailingHeaders ? HttpHeaderType.All ^ HttpHeaderType.Request : HttpHeaderType.General | HttpHeaderType.Response | HttpHeaderType.Custom, 138HttpHeaderType.Request) 167return (knownHeader.HeaderType & HttpHeaderType.NonTrailing) == 0;

12: this(name, HttpHeaderType.Custom, parser: null, knownValues, http2StaticTableIndex, http3StaticTableIndex) 15public KnownHeader(string name, HttpHeaderType headerType, HttpHeaderParser? parser, string[]? knownValues = null, int? http2StaticTableIndex = null, int? http3StaticTableIndex = null) 39public HttpHeaderType HeaderType { get; }

16public static readonly KnownHeader PseudoStatus = new(":status", HttpHeaderType.Response, parser: null); 17public static readonly KnownHeader Accept = new("Accept", HttpHeaderType.Request, MediaTypeHeaderParser.MultipleValuesParser, null, H2StaticTable.Accept, H3StaticTable.AcceptAny); 18public static readonly KnownHeader AcceptCharset = new("Accept-Charset", HttpHeaderType.Request, GenericHeaderParser.MultipleValueStringWithQualityParser, null, H2StaticTable.AcceptCharset); 19public static readonly KnownHeader AcceptEncoding = new("Accept-Encoding", HttpHeaderType.Request, GenericHeaderParser.MultipleValueStringWithQualityParser, null, H2StaticTable.AcceptEncoding, H3StaticTable.AcceptEncodingGzipDeflateBr); 20public static readonly KnownHeader AcceptLanguage = new("Accept-Language", HttpHeaderType.Request, GenericHeaderParser.MultipleValueStringWithQualityParser, null, H2StaticTable.AcceptLanguage, H3StaticTable.AcceptLanguage); 22public static readonly KnownHeader AcceptRanges = new("Accept-Ranges", HttpHeaderType.Response, GenericHeaderParser.TokenListParser, ["bytes", "none"], H2StaticTable.AcceptRanges, H3StaticTable.AcceptRangesBytes); 23public static readonly KnownHeader AccessControlAllowCredentials = new("Access-Control-Allow-Credentials", HttpHeaderType.Response, parser: null, ["true"], http3StaticTableIndex: H3StaticTable.AccessControlAllowCredentials); 24public static readonly KnownHeader AccessControlAllowHeaders = new("Access-Control-Allow-Headers", HttpHeaderType.Response, parser: null, ["*"], http3StaticTableIndex: H3StaticTable.AccessControlAllowHeadersCacheControl); 25public static readonly KnownHeader AccessControlAllowMethods = new("Access-Control-Allow-Methods", HttpHeaderType.Response, parser: null, ["POST", "*"], http3StaticTableIndex: H3StaticTable.AccessControlAllowMethodsGet); 26public static readonly KnownHeader AccessControlAllowOrigin = new("Access-Control-Allow-Origin", HttpHeaderType.Response, parser: null, ["*", "null"], H2StaticTable.AccessControlAllowOrigin, H3StaticTable.AccessControlAllowOriginAny); 27public static readonly KnownHeader AccessControlExposeHeaders = new("Access-Control-Expose-Headers", HttpHeaderType.Response, parser: null, ["*"], H3StaticTable.AccessControlExposeHeadersContentLength); 29public static readonly KnownHeader Age = new("Age", HttpHeaderType.Response | HttpHeaderType.NonTrailing, TimeSpanHeaderParser.Parser, ["0"], H2StaticTable.Age, H3StaticTable.Age0); 30public static readonly KnownHeader Allow = new("Allow", HttpHeaderType.Content, GenericHeaderParser.TokenListParser, null, H2StaticTable.Allow); 31public static readonly KnownHeader AltSvc = new("Alt-Svc", HttpHeaderType.Response, GetAltSvcHeaderParser(), ["h3=\":443\"", "h3=\":443\"; ma=2592000", "clear"], http3StaticTableIndex: H3StaticTable.AltSvcClear); 32public static readonly KnownHeader AltUsed = new("Alt-Used", HttpHeaderType.Request, parser: null); 33public static readonly KnownHeader Authorization = new("Authorization", HttpHeaderType.Request | HttpHeaderType.NonTrailing, GenericHeaderParser.SingleValueAuthenticationParser, null, H2StaticTable.Authorization, H3StaticTable.Authorization); 34public static readonly KnownHeader CacheControl = new("Cache-Control", HttpHeaderType.General | HttpHeaderType.NonTrailing, CacheControlHeaderParser.Parser, ["must-revalidate", "no-cache", "no-store", "no-transform", "private", "proxy-revalidate", "public"], H2StaticTable.CacheControl, H3StaticTable.CacheControlMaxAge0); 35public static readonly KnownHeader Connection = new("Connection", HttpHeaderType.General, GenericHeaderParser.TokenListParser, ["keep-alive", "close", "Upgrade", "Transfer-Encoding"]); 36public static readonly KnownHeader ContentDisposition = new("Content-Disposition", HttpHeaderType.Content | HttpHeaderType.NonTrailing, GenericHeaderParser.ContentDispositionParser, ["inline", "attachment"], H2StaticTable.ContentDisposition, H3StaticTable.ContentDisposition); 37public static readonly KnownHeader ContentEncoding = new("Content-Encoding", HttpHeaderType.Content | HttpHeaderType.NonTrailing, GenericHeaderParser.TokenListParser, ["gzip", "deflate", "br", "zstd", "compress", "identity"], H2StaticTable.ContentEncoding, H3StaticTable.ContentEncodingBr); 38public static readonly KnownHeader ContentLanguage = new("Content-Language", HttpHeaderType.Content, GenericHeaderParser.TokenListParser, null, H2StaticTable.ContentLanguage); 39public static readonly KnownHeader ContentLength = new("Content-Length", HttpHeaderType.Content | HttpHeaderType.NonTrailing, Int64NumberHeaderParser.Parser, null, H2StaticTable.ContentLength, H3StaticTable.ContentLength0); 40public static readonly KnownHeader ContentLocation = new("Content-Location", HttpHeaderType.Content | HttpHeaderType.NonTrailing, UriHeaderParser.RelativeOrAbsoluteUriParser, null, H2StaticTable.ContentLocation); 41public static readonly KnownHeader ContentMD5 = new("Content-MD5", HttpHeaderType.Content, ByteArrayHeaderParser.Parser); 42public static readonly KnownHeader ContentRange = new("Content-Range", HttpHeaderType.Content | HttpHeaderType.NonTrailing, GenericHeaderParser.ContentRangeParser, null, H2StaticTable.ContentRange); 44public static readonly KnownHeader ContentType = new("Content-Type", HttpHeaderType.Content | HttpHeaderType.NonTrailing, MediaTypeHeaderParser.SingleValueParser, null, H2StaticTable.ContentType, H3StaticTable.ContentTypeApplicationDnsMessage); 45public static readonly KnownHeader Cookie = new("Cookie", HttpHeaderType.Custom, CookieHeaderParser.Parser, null, H2StaticTable.Cookie, H3StaticTable.Cookie); 48public static readonly KnownHeader Date = new("Date", HttpHeaderType.General | HttpHeaderType.NonTrailing, DateHeaderParser.Parser, null, H2StaticTable.Date, H3StaticTable.Date); 49public static readonly KnownHeader ETag = new("ETag", HttpHeaderType.Response, GenericHeaderParser.SingleValueEntityTagParser, null, H2StaticTable.ETag, H3StaticTable.ETag); 50public static readonly KnownHeader Expect = new("Expect", HttpHeaderType.Request | HttpHeaderType.NonTrailing, GenericHeaderParser.MultipleValueNameValueWithParametersParser, ["100-continue"], H2StaticTable.Expect); 52public static readonly KnownHeader Expires = new("Expires", HttpHeaderType.Content | HttpHeaderType.NonTrailing, DateHeaderParser.Parser, ["Thu, 01 Jan 1970 00:00:01 GMT", "Mon, 01 Jan 1990 00:00:00 GMT"], H2StaticTable.Expires); 53public static readonly KnownHeader From = new("From", HttpHeaderType.Request, GenericHeaderParser.SingleValueParserWithoutValidation, null, H2StaticTable.From); 57public static readonly KnownHeader Host = new("Host", HttpHeaderType.Request | HttpHeaderType.NonTrailing, GenericHeaderParser.HostParser, null, H2StaticTable.Host); 58public static readonly KnownHeader IfMatch = new("If-Match", HttpHeaderType.Request | HttpHeaderType.NonTrailing, GenericHeaderParser.MultipleValueEntityTagParser, null, H2StaticTable.IfMatch); 59public static readonly KnownHeader IfModifiedSince = new("If-Modified-Since", HttpHeaderType.Request | HttpHeaderType.NonTrailing, DateHeaderParser.Parser, null, H2StaticTable.IfModifiedSince, H3StaticTable.IfModifiedSince); 60public static readonly KnownHeader IfNoneMatch = new("If-None-Match", HttpHeaderType.Request | HttpHeaderType.NonTrailing, GenericHeaderParser.MultipleValueEntityTagParser, null, H2StaticTable.IfNoneMatch, H3StaticTable.IfNoneMatch); 61public static readonly KnownHeader IfRange = new("If-Range", HttpHeaderType.Request | HttpHeaderType.NonTrailing, GenericHeaderParser.RangeConditionParser, null, H2StaticTable.IfRange, H3StaticTable.IfRange); 62public static readonly KnownHeader IfUnmodifiedSince = new("If-Unmodified-Since", HttpHeaderType.Request | HttpHeaderType.NonTrailing, DateHeaderParser.Parser, null, H2StaticTable.IfUnmodifiedSince); 64public static readonly KnownHeader LastModified = new("Last-Modified", HttpHeaderType.Content, DateHeaderParser.Parser, null, H2StaticTable.LastModified, H3StaticTable.LastModified); 66public static readonly KnownHeader Location = new("Location", HttpHeaderType.Response | HttpHeaderType.NonTrailing, UriHeaderParser.RelativeOrAbsoluteUriParser, null, H2StaticTable.Location, H3StaticTable.Location); 67public static readonly KnownHeader MaxForwards = new("Max-Forwards", HttpHeaderType.Request | HttpHeaderType.NonTrailing, Int32NumberHeaderParser.Parser, null, H2StaticTable.MaxForwards); 70public static readonly KnownHeader Pragma = new("Pragma", HttpHeaderType.General | HttpHeaderType.NonTrailing, GenericHeaderParser.MultipleValueNameValueParser, ["no-cache"]); 71public static readonly KnownHeader ProxyAuthenticate = new("Proxy-Authenticate", HttpHeaderType.Response | HttpHeaderType.NonTrailing, GenericHeaderParser.MultipleValueAuthenticationParser, null, H2StaticTable.ProxyAuthenticate); 72public static readonly KnownHeader ProxyAuthorization = new("Proxy-Authorization", HttpHeaderType.Request | HttpHeaderType.NonTrailing, GenericHeaderParser.SingleValueAuthenticationParser, null, H2StaticTable.ProxyAuthorization); 76public static readonly KnownHeader Range = new("Range", HttpHeaderType.Request | HttpHeaderType.NonTrailing, GenericHeaderParser.RangeParser, null, H2StaticTable.Range, H3StaticTable.RangeBytes0ToAll); 77public static readonly KnownHeader Referer = new("Referer", HttpHeaderType.Request, UriHeaderParser.RelativeOrAbsoluteUriParser, null, H2StaticTable.Referer, H3StaticTable.Referer); // NB: The spelling-mistake "Referer" for "Referrer" must be matched. 80public static readonly KnownHeader RetryAfter = new("Retry-After", HttpHeaderType.Response | HttpHeaderType.NonTrailing, GenericHeaderParser.RetryConditionParser, null, H2StaticTable.RetryAfter); 86public static readonly KnownHeader Server = new("Server", HttpHeaderType.Response, ProductInfoHeaderParser.MultipleValueParser, null, H2StaticTable.Server, H3StaticTable.Server); 88public static readonly KnownHeader SetCookie = new("Set-Cookie", HttpHeaderType.Custom | HttpHeaderType.NonTrailing, null, null, H2StaticTable.SetCookie, H3StaticTable.SetCookie); 89public static readonly KnownHeader SetCookie2 = new("Set-Cookie2", HttpHeaderType.Custom | HttpHeaderType.NonTrailing, null); 91public static readonly KnownHeader TE = new("TE", HttpHeaderType.Request | HttpHeaderType.NonTrailing, TransferCodingHeaderParser.MultipleValueWithQualityParser, ["trailers", "compress", "deflate", "gzip"]); 93public static readonly KnownHeader Trailer = new("Trailer", HttpHeaderType.General | HttpHeaderType.NonTrailing, GenericHeaderParser.TokenListParser); 94public static readonly KnownHeader TransferEncoding = new("Transfer-Encoding", HttpHeaderType.General | HttpHeaderType.NonTrailing, TransferCodingHeaderParser.MultipleValueParser, ["chunked", "compress", "deflate", "gzip", "identity"], H2StaticTable.TransferEncoding); 96public static readonly KnownHeader Upgrade = new("Upgrade", HttpHeaderType.General, GenericHeaderParser.MultipleValueProductParser); 98public static readonly KnownHeader UserAgent = new("User-Agent", HttpHeaderType.Request, ProductInfoHeaderParser.MultipleValueParser, null, H2StaticTable.UserAgent, H3StaticTable.UserAgent); 99public static readonly KnownHeader Vary = new("Vary", HttpHeaderType.Response | HttpHeaderType.NonTrailing, GenericHeaderParser.TokenListParser, ["Accept-Encoding", "accept-encoding", "Origin", "Referer", "*"], H2StaticTable.Vary, H3StaticTable.VaryAcceptEncoding); 100public static readonly KnownHeader Via = new("Via", HttpHeaderType.General, GenericHeaderParser.MultipleValueViaParser, null, H2StaticTable.Via); 101public static readonly KnownHeader WWWAuthenticate = new("WWW-Authenticate", HttpHeaderType.Response | HttpHeaderType.NonTrailing, GenericHeaderParser.MultipleValueAuthenticationParser, null, H2StaticTable.WwwAuthenticate); 102public static readonly KnownHeader Warning = new("Warning", HttpHeaderType.General | HttpHeaderType.NonTrailing, GenericHeaderParser.MultipleValueWarningParser);

712_trailers.TryAddWithoutValidation((descriptor.HeaderType & HttpHeaderType.Request) == HttpHeaderType.Request ? descriptor.AsCustomHeader() : descriptor, headerValue); 714else if ((descriptor.HeaderType & HttpHeaderType.Content) == HttpHeaderType.Content) 724_response.Headers.TryAddWithoutValidation((descriptor.HeaderType & HttpHeaderType.Request) == HttpHeaderType.Request ? descriptor.AsCustomHeader() : descriptor, headerValue);

1152case HeaderState.ResponseHeaders when descriptor.HeaderType.HasFlag(HttpHeaderType.Content): 1156_response!.Headers.TryAddWithoutValidation(descriptor.HeaderType.HasFlag(HttpHeaderType.Request) ? descriptor.AsCustomHeader() : descriptor, headerValue); 1159_trailingHeaders!.Add((descriptor.HeaderType.HasFlag(HttpHeaderType.Request) ? descriptor.AsCustomHeader() : descriptor, headerValue));

1280HttpHeaderType headerType = descriptor.HeaderType; 1283if ((headerType & HttpHeaderType.Request) != 0) 1293if ((headerType & HttpHeaderType.NonTrailing) != 0) 1303else if ((headerType & HttpHeaderType.Content) != 0)