From catalog/rfc9110-http.abnf rule: WWW-Authenticate

Definition

WWW-Authenticate = *challenge

challenge = auth-scheme [1*SP (token68 / #auth-param)]

token68 = 1*(ALPHA / DIGIT / "-" / "." / "_" / "~" / "+" / "/") *"="

auth-scheme = token

auth-param = token BWS "=" BWS (token / quoted-string)

token = 1*tchar

tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~" / DIGIT / ALPHA

quoted-string = DQUOTE *(qdtext / quoted-pair) DQUOTE

quoted-pair = "\" (HTAB / SP / VCHAR / obs-text)

qdtext = HTAB / SP / %x21 / %x23-5b / %x5d-7e / obs-text

obs-text = %x80-ff

BWS = OWS

OWS = *(SP / HTAB)

Info

Rulename
WWW-Authenticate
Dependencies
SP, HTAB, OWS, BWS, DQUOTE, obs-text, qdtext, VCHAR, quoted-pair, quoted-string, ALPHA, DIGIT, tchar, token, auth-param, auth-scheme, token68, challenge, WWW-Authenticate
Used Builtins
ALPHA, DIGIT, DQUOTE, HTAB, SP, VCHAR

Alphabet

Translations

Railroad Diagram

WWW-Authenticate challenge

Swift Regular Expression

|[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*|[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]* ( |([!#-'*-+\--.0-9A-Z\^-z|~]|((,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")((,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")*[!#-'*-+\--.0-9A-Z\^-z|~])[!#-'*-+\--.0-9A-Z\^-z|~]* |/[+\--9A-Z_a-z~]*([!#-'*\^`|]|==*[!#-'*-+\--.0-9A-Z\^-z|~])[!#-'*-+\--.0-9A-Z\^-z|~]* )*(|(,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*|((,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")((,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")*(|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*)|([!#-'*-+\--.0-9A-Z\^-z|~]|((,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")((,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")*[!#-'*-+\--.0-9A-Z\^-z|~])[!#-'*-+\--.0-9A-Z\^-z|~]*|/[+\--9A-Z_a-z~]*(|==*|([!#-'*\^`|]|==*[!#-'*-+\--.0-9A-Z\^-z|~])[!#-'*-+\--.0-9A-Z\^-z|~]*))

POSIX Extended Regular Expression

|[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*|[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]* ( |([!#-'*-+\--.0-9A-Z\^-z|~]|((,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")((,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")*[!#-'*-+\--.0-9A-Z\^-z|~])[!#-'*-+\--.0-9A-Z\^-z|~]* |/[+\--9A-Z_a-z~]*([!#-'*\^`|]|==*[!#-'*-+\--.0-9A-Z\^-z|~])[!#-'*-+\--.0-9A-Z\^-z|~]* )*(|(,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*|((,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")((,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")*(|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*)|([!#-'*-+\--.0-9A-Z\^-z|~]|((,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|\u{9}[\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")((,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*"|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~]([!#-'*-+\--.0-9A-Z\^-z|~]|(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~])*(,|[\u{9} ][\u{9} ]*,)[\u{9} ]*[!#-'*-+\--.0-9A-Z\^-z|~][!#-'*-+\--.0-9A-Z\^-z|~]*(=|[\u{9} ][\u{9} ]*=)[\u{9} ]*"([\u{9} -!#-\[\]-~\u{80}-\u{FF}]|\\[\u{9} -~\u{80}-\u{FF}])*")*[!#-'*-+\--.0-9A-Z\^-z|~])[!#-'*-+\--.0-9A-Z\^-z|~]*|/[+\--9A-Z_a-z~]*(|==*|([!#-'*\^`|]|==*[!#-'*-+\--.0-9A-Z\^-z|~])[!#-'*-+\--.0-9A-Z\^-z|~]*))