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utils.go
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// 🚀 Fiber is an Express inspired web framework written in Go with 💖
// 📌 API Documentation: https://fiber.wiki
// 📝 Github Repository: https://github.com/gofiber/fiber
package fiber
import (
"bytes"
"fmt"
"net"
"os"
"path/filepath"
"regexp"
"strings"
"time"
"unsafe"
)
func groupPaths(prefix, path string) string {
if path == "/" {
path = ""
}
path = prefix + path
path = strings.Replace(path, "//", "/", -1)
return path
}
func getParams(path string) (params []string) {
if len(path) < 1 {
return
}
segments := strings.Split(path, "/")
replacer := strings.NewReplacer(":", "", "?", "")
for _, s := range segments {
if s == "" {
continue
} else if s[0] == ':' {
params = append(params, replacer.Replace(s))
}
if strings.Contains(s, "*") {
params = append(params, "*")
}
}
return
}
func getRegex(path string) (*regexp.Regexp, error) {
pattern := "^"
segments := strings.Split(path, "/")
for _, s := range segments {
if s == "" {
continue
}
if s[0] == ':' {
if strings.Contains(s, "?") {
pattern += "(?:/([^/]+?))?"
} else {
pattern += "/(?:([^/]+?))"
}
} else if s[0] == '*' {
pattern += "/(.*)"
} else {
pattern += "/" + s
}
}
pattern += "/?$"
regex, err := regexp.Compile(pattern)
return regex, err
}
func getFiles(root string) (files []string, dir bool, err error) {
root = filepath.Clean(root)
if _, err := os.Lstat(root); err != nil {
return files, dir, fmt.Errorf("%s", err)
}
err = filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
if !info.IsDir() {
files = append(files, path)
} else {
dir = true
}
return err
})
return
}
func getMIME(extension string) (mime string) {
if extension == "" {
return mime
}
mime = extensionMIME[extension]
if mime == "" {
return MIMEOctetStream
}
return mime
}
// #nosec G103
// getString converts byte slice to a string without memory allocation.
// See https://groups.google.com/forum/#!msg/Golang-Nuts/ENgbUzYvCuU/90yGx7GUAgAJ .
var getString = func(b []byte) string {
return *(*string)(unsafe.Pointer(&b))
}
var getStringImmutable = func(b []byte) string {
return string(b)
}
// #nosec G103
// getBytes converts string to a byte slice without memory allocation.
// See https://groups.google.com/forum/#!msg/Golang-Nuts/ENgbUzYvCuU/90yGx7GUAgAJ .
var getBytes = func(s string) (b []byte) {
return *(*[]byte)(unsafe.Pointer(&s))
}
var getBytesImmutable = func(s string) (b []byte) {
return []byte(s)
}
// Check if -prefork is in arguments
func isPrefork() bool {
for _, v := range os.Args[1:] {
if v == "-prefork" {
return true
}
}
return false
}
// Check if -child is in arguments
func isChild() bool {
for _, v := range os.Args[1:] {
if v == "-child" {
return true
}
}
return false
}
// https://golang.org/src/net/net.go#L113
// Helper methods for application#test
type testConn struct {
net.Conn
r bytes.Buffer
w bytes.Buffer
}
func (c *testConn) RemoteAddr() net.Addr {
return &net.TCPAddr{
IP: net.IPv4(0, 0, 0, 0),
}
}
func (c *testConn) LocalAddr() net.Addr { return c.RemoteAddr() }
func (c *testConn) Read(b []byte) (int, error) { return c.r.Read(b) }
func (c *testConn) Write(b []byte) (int, error) { return c.w.Write(b) }
func (c *testConn) Close() error { return nil }
func (c *testConn) SetDeadline(t time.Time) error { return nil }
func (c *testConn) SetReadDeadline(t time.Time) error { return nil }
func (c *testConn) SetWriteDeadline(t time.Time) error { return nil }
// HTTP status codes were copied from net/http.
var statusMessages = map[int]string{
100: "Continue",
101: "Switching Protocols",
102: "Processing",
200: "OK",
201: "Created",
202: "Accepted",
203: "Non-Authoritative Information",
204: "No Content",
205: "Reset Content",
206: "Partial Content",
207: "Multi-Status",
208: "Already Reported",
226: "IM Used",
300: "Multiple Choices",
301: "Moved Permanently",
302: "Found",
303: "See Other",
304: "Not Modified",
305: "Use Proxy",
306: "Switch Proxy",
307: "Temporary Redirect",
308: "Permanent Redirect",
400: "Bad Request",
401: "Unauthorized",
402: "Payment Required",
403: "Forbidden",
404: "Not Found",
405: "Method Not Allowed",
406: "Not Acceptable",
407: "Proxy Authentication Required",
408: "Request Timeout",
409: "Conflict",
410: "Gone",
411: "Length Required",
412: "Precondition Failed",
413: "Request Entity Too Large",
414: "Request URI Too Long",
415: "Unsupported Media Type",
416: "Requested Range Not Satisfiable",
417: "Expectation Failed",
418: "I'm a teapot",
422: "Unprocessable Entity",
423: "Locked",
424: "Failed Dependency",
426: "Upgrade Required",
428: "Precondition Required",
429: "Too Many Requests",
431: "Request Header Fields Too Large",
451: "Unavailable For Legal Reasons",
500: "Internal Server Error",
501: "Not Implemented",
502: "Bad Gateway",
503: "Service Unavailable",
504: "Gateway Timeout",
505: "HTTP Version Not Supported",
506: "Variant Also Negotiates",
507: "Insufficient Storage",
508: "Loop Detected",
510: "Not Extended",
511: "Network Authentication Required",
}
// MIME types were copied from labstack/echo
const (
MIMETextXML = "text/xml"
MIMETextHTML = "text/html"
MIMETextPlain = "text/plain"
MIMEApplicationJSON = "application/json"
MIMEApplicationJavaScript = "application/javascript"
MIMEApplicationXML = "application/xml"
MIMEApplicationForm = "application/x-www-form-urlencoded"
MIMEMultipartForm = "multipart/form-data"
MIMEOctetStream = "application/octet-stream"
)
// MIME types were copied from nginx/mime.types.
var extensionMIME = map[string]string{
// without dot
"html": "text/html",
"htm": "text/html",
"shtml": "text/html",
"css": "text/css",
"gif": "image/gif",
"jpeg": "image/jpeg",
"jpg": "image/jpeg",
"xml": "application/xml",
"js": "application/javascript",
"atom": "application/atom+xml",
"rss": "application/rss+xml",
"mml": "text/mathml",
"txt": "text/plain",
"jad": "text/vnd.sun.j2me.app-descriptor",
"wml": "text/vnd.wap.wml",
"htc": "text/x-component",
"png": "image/png",
"svg": "image/svg+xml",
"svgz": "image/svg+xml",
"tif": "image/tiff",
"tiff": "image/tiff",
"wbmp": "image/vnd.wap.wbmp",
"webp": "image/webp",
"ico": "image/x-icon",
"jng": "image/x-jng",
"bmp": "image/x-ms-bmp",
"woff": "font/woff",
"woff2": "font/woff2",
"jar": "application/java-archive",
"war": "application/java-archive",
"ear": "application/java-archive",
"json": "application/json",
"hqx": "application/mac-binhex40",
"doc": "application/msword",
"pdf": "application/pdf",
"ps": "application/postscript",
"eps": "application/postscript",
"ai": "application/postscript",
"rtf": "application/rtf",
"m3u8": "application/vnd.apple.mpegurl",
"kml": "application/vnd.google-earth.kml+xml",
"kmz": "application/vnd.google-earth.kmz",
"xls": "application/vnd.ms-excel",
"eot": "application/vnd.ms-fontobject",
"ppt": "application/vnd.ms-powerpoint",
"odg": "application/vnd.oasis.opendocument.graphics",
"odp": "application/vnd.oasis.opendocument.presentation",
"ods": "application/vnd.oasis.opendocument.spreadsheet",
"odt": "application/vnd.oasis.opendocument.text",
"wmlc": "application/vnd.wap.wmlc",
"7z": "application/x-7z-compressed",
"cco": "application/x-cocoa",
"jardiff": "application/x-java-archive-diff",
"jnlp": "application/x-java-jnlp-file",
"run": "application/x-makeself",
"pl": "application/x-perl",
"pm": "application/x-perl",
"prc": "application/x-pilot",
"pdb": "application/x-pilot",
"rar": "application/x-rar-compressed",
"rpm": "application/x-redhat-package-manager",
"sea": "application/x-sea",
"swf": "application/x-shockwave-flash",
"sit": "application/x-stuffit",
"tcl": "application/x-tcl",
"tk": "application/x-tcl",
"der": "application/x-x509-ca-cert",
"pem": "application/x-x509-ca-cert",
"crt": "application/x-x509-ca-cert",
"xpi": "application/x-xpinstall",
"xhtml": "application/xhtml+xml",
"xspf": "application/xspf+xml",
"zip": "application/zip",
"bin": "application/octet-stream",
"exe": "application/octet-stream",
"dll": "application/octet-stream",
"deb": "application/octet-stream",
"dmg": "application/octet-stream",
"iso": "application/octet-stream",
"img": "application/octet-stream",
"msi": "application/octet-stream",
"msp": "application/octet-stream",
"msm": "application/octet-stream",
"mid": "audio/midi",
"midi": "audio/midi",
"kar": "audio/midi",
"mp3": "audio/mpeg",
"ogg": "audio/ogg",
"m4a": "audio/x-m4a",
"ra": "audio/x-realaudio",
"3gpp": "video/3gpp",
"3gp": "video/3gpp",
"ts": "video/mp2t",
"mp4": "video/mp4",
"mpeg": "video/mpeg",
"mpg": "video/mpeg",
"mov": "video/quicktime",
"webm": "video/webm",
"flv": "video/x-flv",
"m4v": "video/x-m4v",
"mng": "video/x-mng",
"asx": "video/x-ms-asf",
"asf": "video/x-ms-asf",
"wmv": "video/x-ms-wmv",
"avi": "video/x-msvideo",
// with dot
".html": "text/html",
".htm": "text/html",
".shtml": "text/html",
".css": "text/css",
".gif": "image/gif",
".jpeg": "image/jpeg",
".jpg": "image/jpeg",
".xml": "application/xml",
".js": "application/javascript",
".atom": "application/atom+xml",
".rss": "application/rss+xml",
".mml": "text/mathml",
".txt": "text/plain",
".jad": "text/vnd.sun.j2me.app-descriptor",
".wml": "text/vnd.wap.wml",
".htc": "text/x-component",
".png": "image/png",
".svg": "image/svg+xml",
".svgz": "image/svg+xml",
".tif": "image/tiff",
".tiff": "image/tiff",
".wbmp": "image/vnd.wap.wbmp",
".webp": "image/webp",
".ico": "image/x-icon",
".jng": "image/x-jng",
".bmp": "image/x-ms-bmp",
".woff": "font/woff",
".woff2": "font/woff2",
".jar": "application/java-archive",
".war": "application/java-archive",
".ear": "application/java-archive",
".json": "application/json",
".hqx": "application/mac-binhex40",
".doc": "application/msword",
".pdf": "application/pdf",
".ps": "application/postscript",
".eps": "application/postscript",
".ai": "application/postscript",
".rtf": "application/rtf",
".m3u8": "application/vnd.apple.mpegurl",
".kml": "application/vnd.google-earth.kml+xml",
".kmz": "application/vnd.google-earth.kmz",
".xls": "application/vnd.ms-excel",
".eot": "application/vnd.ms-fontobject",
".ppt": "application/vnd.ms-powerpoint",
".odg": "application/vnd.oasis.opendocument.graphics",
".odp": "application/vnd.oasis.opendocument.presentation",
".ods": "application/vnd.oasis.opendocument.spreadsheet",
".odt": "application/vnd.oasis.opendocument.text",
".wmlc": "application/vnd.wap.wmlc",
".7z": "application/x-7z-compressed",
".cco": "application/x-cocoa",
".jardiff": "application/x-java-archive-diff",
".jnlp": "application/x-java-jnlp-file",
".run": "application/x-makeself",
".pl": "application/x-perl",
".pm": "application/x-perl",
".prc": "application/x-pilot",
".pdb": "application/x-pilot",
".rar": "application/x-rar-compressed",
".rpm": "application/x-redhat-package-manager",
".sea": "application/x-sea",
".swf": "application/x-shockwave-flash",
".sit": "application/x-stuffit",
".tcl": "application/x-tcl",
".tk": "application/x-tcl",
".der": "application/x-x509-ca-cert",
".pem": "application/x-x509-ca-cert",
".crt": "application/x-x509-ca-cert",
".xpi": "application/x-xpinstall",
".xhtml": "application/xhtml+xml",
".xspf": "application/xspf+xml",
".zip": "application/zip",
".bin": "application/octet-stream",
".exe": "application/octet-stream",
".dll": "application/octet-stream",
".deb": "application/octet-stream",
".dmg": "application/octet-stream",
".iso": "application/octet-stream",
".img": "application/octet-stream",
".msi": "application/octet-stream",
".msp": "application/octet-stream",
".msm": "application/octet-stream",
".mid": "audio/midi",
".midi": "audio/midi",
".kar": "audio/midi",
".mp3": "audio/mpeg",
".ogg": "audio/ogg",
".m4a": "audio/x-m4a",
".ra": "audio/x-realaudio",
".3gpp": "video/3gpp",
".3gp": "video/3gpp",
".ts": "video/mp2t",
".mp4": "video/mp4",
".mpeg": "video/mpeg",
".mpg": "video/mpeg",
".mov": "video/quicktime",
".webm": "video/webm",
".flv": "video/x-flv",
".m4v": "video/x-m4v",
".mng": "video/x-mng",
".asx": "video/x-ms-asf",
".asf": "video/x-ms-asf",
".wmv": "video/x-ms-wmv",
".avi": "video/x-msvideo",
}
// HTTP methods were copied from net/http.
const (
MethodGet = "GET" // RFC 7231, 4.3.1
MethodHead = "HEAD" // RFC 7231, 4.3.2
MethodPost = "POST" // RFC 7231, 4.3.3
MethodPut = "PUT" // RFC 7231, 4.3.4
MethodPatch = "PATCH" // RFC 5789
MethodDelete = "DELETE" // RFC 7231, 4.3.5
MethodConnect = "CONNECT" // RFC 7231, 4.3.6
MethodOptions = "OPTIONS" // RFC 7231, 4.3.7
MethodTrace = "TRACE" // RFC 7231, 4.3.8
)
// HTTP Headers were copied from net/http.
const (
// Authentication
HeaderAuthorization = "Authorization"
HeaderProxyAuthenticate = "Proxy-Authenticate"
HeaderProxyAuthorization = "Proxy-Authorization"
HeaderWWWAuthenticate = "WWW-Authenticate"
// Caching
HeaderAge = "Age"
HeaderCacheControl = "Cache-Control"
HeaderClearSiteData = "Clear-Site-Data"
HeaderExpires = "Expires"
HeaderPragma = "Pragma"
HeaderWarning = "Warning"
// Client hints
HeaderAcceptCH = "Accept-CH"
HeaderAcceptCHLifetime = "Accept-CH-Lifetime"
HeaderContentDPR = "Content-DPR"
HeaderDPR = "DPR"
HeaderEarlyData = "Early-Data"
HeaderSaveData = "Save-Data"
HeaderViewportWidth = "Viewport-Width"
HeaderWidth = "Width"
// Conditionals
HeaderETag = "ETag"
HeaderIfMatch = "If-Match"
HeaderIfModifiedSince = "If-Modified-Since"
HeaderIfNoneMatch = "If-None-Match"
HeaderIfUnmodifiedSince = "If-Unmodified-Since"
HeaderLastModified = "Last-Modified"
HeaderVary = "Vary"
// Connection management
HeaderConnection = "Connection"
HeaderKeepAlive = "Keep-Alive"
// Content negotiation
HeaderAccept = "Accept"
HeaderAcceptCharset = "Accept-Charset"
HeaderAcceptEncoding = "Accept-Encoding"
HeaderAcceptLanguage = "Accept-Language"
// Controls
HeaderCookie = "Cookie"
HeaderExpect = "Expect"
HeaderMaxForwards = "Max-Forwards"
HeaderSetCookie = "Set-Cookie"
// CORS
HeaderAccessControlAllowCredentials = "Access-Control-Allow-Credentials"
HeaderAccessControlAllowHeaders = "Access-Control-Allow-Headers"
HeaderAccessControlAllowMethods = "Access-Control-Allow-Methods"
HeaderAccessControlAllowOrigin = "Access-Control-Allow-Origin"
HeaderAccessControlExposeHeaders = "Access-Control-Expose-Headers"
HeaderAccessControlMaxAge = "Access-Control-Max-Age"
HeaderAccessControlRequestHeaders = "Access-Control-Request-Headers"
HeaderAccessControlRequestMethod = "Access-Control-Request-Method"
HeaderOrigin = "Origin"
HeaderTimingAllowOrigin = "Timing-Allow-Origin"
HeaderXPermittedCrossDomainPolicies = "X-Permitted-Cross-Domain-Policies"
// Do Not Track
HeaderDNT = "DNT"
HeaderTk = "Tk"
// Downloads
HeaderContentDisposition = "Content-Disposition"
// Message body information
HeaderContentEncoding = "Content-Encoding"
HeaderContentLanguage = "Content-Language"
HeaderContentLength = "Content-Length"
HeaderContentLocation = "Content-Location"
HeaderContentType = "Content-Type"
// Proxies
HeaderForwarded = "Forwarded"
HeaderVia = "Via"
HeaderXForwardedFor = "X-Forwarded-For"
HeaderXForwardedHost = "X-Forwarded-Host"
HeaderXForwardedProto = "X-Forwarded-Proto"
// Redirects
HeaderLocation = "Location"
// Request context
HeaderFrom = "From"
HeaderHost = "Host"
HeaderReferer = "Referer"
HeaderReferrerPolicy = "Referrer-Policy"
HeaderUserAgent = "User-Agent"
// Response context
HeaderAllow = "Allow"
HeaderServer = "Server"
// Range requests
HeaderAcceptRanges = "Accept-Ranges"
HeaderContentRange = "Content-Range"
HeaderIfRange = "If-Range"
HeaderRange = "Range"
// Security
HeaderContentSecurityPolicy = "Content-Security-Policy"
HeaderContentSecurityPolicyReportOnly = "Content-Security-Policy-Report-Only"
HeaderCrossOriginResourcePolicy = "Cross-Origin-Resource-Policy"
HeaderExpectCT = "Expect-CT"
HeaderFeaturePolicy = "Feature-Policy"
HeaderPublicKeyPins = "Public-Key-Pins"
HeaderPublicKeyPinsReportOnly = "Public-Key-Pins-Report-Only"
HeaderStrictTransportSecurity = "Strict-Transport-Security"
HeaderUpgradeInsecureRequests = "Upgrade-Insecure-Requests"
HeaderXContentTypeOptions = "X-Content-Type-Options"
HeaderXDownloadOptions = "X-Download-Options"
HeaderXFrameOptions = "X-Frame-Options"
HeaderXPoweredBy = "X-Powered-By"
HeaderXXSSProtection = "X-XSS-Protection"
// Server-sent event
HeaderLastEventID = "Last-Event-ID"
HeaderNEL = "NEL"
HeaderPingFrom = "Ping-From"
HeaderPingTo = "Ping-To"
HeaderReportTo = "Report-To"
// Transfer coding
HeaderTE = "TE"
HeaderTrailer = "Trailer"
HeaderTransferEncoding = "Transfer-Encoding"
// WebSockets
HeaderSecWebSocketAccept = "Sec-WebSocket-Accept"
HeaderSecWebSocketExtensions = "Sec-WebSocket-Extensions"
HeaderSecWebSocketKey = "Sec-WebSocket-Key"
HeaderSecWebSocketProtocol = "Sec-WebSocket-Protocol"
HeaderSecWebSocketVersion = "Sec-WebSocket-Version"
// Other
HeaderAcceptPatch = "Accept-Patch"
HeaderAcceptPushPolicy = "Accept-Push-Policy"
HeaderAcceptSignature = "Accept-Signature"
HeaderAltSvc = "Alt-Svc"
HeaderDate = "Date"
HeaderIndex = "Index"
HeaderLargeAllocation = "Large-Allocation"
HeaderLink = "Link"
HeaderPushPolicy = "Push-Policy"
HeaderRetryAfter = "Retry-After"
HeaderServerTiming = "Server-Timing"
HeaderSignature = "Signature"
HeaderSignedHeaders = "Signed-Headers"
HeaderSourceMap = "SourceMap"
HeaderUpgrade = "Upgrade"
HeaderXDNSPrefetchControl = "X-DNS-Prefetch-Control"
HeaderXPingback = "X-Pingback"
HeaderXRequestID = "X-Request-ID"
HeaderXRequestedWith = "X-Requested-With"
HeaderXRobotsTag = "X-Robots-Tag"
HeaderXUACompatible = "X-UA-Compatible"
)
// HTTP status codes were copied from net/http.
const (
StatusContinue = 100 // RFC 7231, 6.2.1
StatusSwitchingProtocols = 101 // RFC 7231, 6.2.2
StatusProcessing = 102 // RFC 2518, 10.1
StatusOK = 200 // RFC 7231, 6.3.1
StatusCreated = 201 // RFC 7231, 6.3.2
StatusAccepted = 202 // RFC 7231, 6.3.3
StatusNonAuthoritativeInfo = 203 // RFC 7231, 6.3.4
StatusNoContent = 204 // RFC 7231, 6.3.5
StatusResetContent = 205 // RFC 7231, 6.3.6
StatusPartialContent = 206 // RFC 7233, 4.1
StatusMultiStatus = 207 // RFC 4918, 11.1
StatusAlreadyReported = 208 // RFC 5842, 7.1
StatusIMUsed = 226 // RFC 3229, 10.4.1
StatusMultipleChoices = 300 // RFC 7231, 6.4.1
StatusMovedPermanently = 301 // RFC 7231, 6.4.2
StatusFound = 302 // RFC 7231, 6.4.3
StatusSeeOther = 303 // RFC 7231, 6.4.4
StatusNotModified = 304 // RFC 7232, 4.1
StatusUseProxy = 305 // RFC 7231, 6.4.5
StatusTemporaryRedirect = 307 // RFC 7231, 6.4.7
StatusPermanentRedirect = 308 // RFC 7538, 3
StatusBadRequest = 400 // RFC 7231, 6.5.1
StatusUnauthorized = 401 // RFC 7235, 3.1
StatusPaymentRequired = 402 // RFC 7231, 6.5.2
StatusForbidden = 403 // RFC 7231, 6.5.3
StatusNotFound = 404 // RFC 7231, 6.5.4
StatusMethodNotAllowed = 405 // RFC 7231, 6.5.5
StatusNotAcceptable = 406 // RFC 7231, 6.5.6
StatusProxyAuthRequired = 407 // RFC 7235, 3.2
StatusRequestTimeout = 408 // RFC 7231, 6.5.7
StatusConflict = 409 // RFC 7231, 6.5.8
StatusGone = 410 // RFC 7231, 6.5.9
StatusLengthRequired = 411 // RFC 7231, 6.5.10
StatusPreconditionFailed = 412 // RFC 7232, 4.2
StatusRequestEntityTooLarge = 413 // RFC 7231, 6.5.11
StatusRequestURITooLong = 414 // RFC 7231, 6.5.12
StatusUnsupportedMediaType = 415 // RFC 7231, 6.5.13
StatusRequestedRangeNotSatisfiable = 416 // RFC 7233, 4.4
StatusExpectationFailed = 417 // RFC 7231, 6.5.14
StatusTeapot = 418 // RFC 7168, 2.3.3
StatusUnprocessableEntity = 422 // RFC 4918, 11.2
StatusLocked = 423 // RFC 4918, 11.3
StatusFailedDependency = 424 // RFC 4918, 11.4
StatusUpgradeRequired = 426 // RFC 7231, 6.5.15
StatusPreconditionRequired = 428 // RFC 6585, 3
StatusTooManyRequests = 429 // RFC 6585, 4
StatusRequestHeaderFieldsTooLarge = 431 // RFC 6585, 5
StatusUnavailableForLegalReasons = 451 // RFC 7725, 3
StatusInternalServerError = 500 // RFC 7231, 6.6.1
StatusNotImplemented = 501 // RFC 7231, 6.6.2
StatusBadGateway = 502 // RFC 7231, 6.6.3
StatusServiceUnavailable = 503 // RFC 7231, 6.6.4
StatusGatewayTimeout = 504 // RFC 7231, 6.6.5
StatusHTTPVersionNotSupported = 505 // RFC 7231, 6.6.6
StatusVariantAlsoNegotiates = 506 // RFC 2295, 8.1
StatusInsufficientStorage = 507 // RFC 4918, 11.5
StatusLoopDetected = 508 // RFC 5842, 7.2
StatusNotExtended = 510 // RFC 2774, 7
StatusNetworkAuthenticationRequired = 511 // RFC 6585, 6
)