2. Notational Conventions and Generic Grammar
OCTET = <any 8-bit character> CHAR = <any US-ASCII character (octets 0 - 127)> UPALPHA = <any US-ASCII uppercase letter "A".."Z"> LOALPHA = <any US-ASCII lowercase letter "a".."z"> ALPHA = UPALPHA | LOALPHA DIGIT = <any US-ASCII digit "0".."9"> CTL = <any US-ASCII control character (octets 0 - 31) and DEL (127)> CR = <US-ASCII CR, carriage return (13)> LF = <US-ASCII LF, linefeed (10)> SP = <US-ASCII SP, space (32)> HTAB = <US-ASCII HT, horizontal-tab (9)> <"> = <US-ASCII double-quote mark>HTTP/1.0 defines the octet sequence CR LF as the end-of-line marker for all protocol elements except the Entity-Body (see Appendix C for tolerant applications). The end-of-line marker for an Entity-Body is defined by its associated media type, as described in Section 8.1.
CRLF = CR LFHTTP/1.0 headers can be folded onto multiple lines if the continuation lines begin with linear whitespace characters. All linear whitespace (including folding) has the same semantics as SP.
LWS = [CRLF] 1*( SP | HTAB )Many HTTP/1.0 header field values consist of words separated by LWS or special characters. These special characters must be in a quoted string to be used within a parameter value.
word = token | quoted-string
token = 1*<any CHAR except CTLs or tspecials>
tspecials = "(" | ")" | "<" | ">" | "@"
| "," | ";" | ":" | "\" | <">
| "/" | "[" | "]" | "?" | "="
| SP | HTAB
A string of text is parsed as a single word if it is quoted using double-quote marks or angle brackets.
quoted-string = ( <"> *(qdtext) <"> ) | ( "<" *(qatext) ">" ) qdtext = <any CHAR except <"> and CTLs, but including LWS> qatext = <any CHAR except "<", ">", and CTLs, but including LWS>The text rule is only used for descriptive field contents. Words of *text may contain characters from character sets other than US-ASCII only when encoded according to the rules of RFC 1522 [13].
text = <any OCTET except CTLs, but including LWS>
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