TUN-3403: Unit test for origin/proxy to test serving HTTP and Websocket

vendor/github.com/gobwas/httphead/octet.go

@@ -0,0 +1,83 @@
+package httphead
+
+// OctetType desribes character type.
+//
+// From the "Basic Rules" chapter of RFC2616
+// See https://tools.ietf.org/html/rfc2616#section-2.2
+//
+// OCTET          = <any 8-bit sequence of data>
+// 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)>
+// HT             = <US-ASCII HT, horizontal-tab (9)>
+// <">            = <US-ASCII double-quote mark (34)>
+// CRLF           = CR LF
+// LWS            = [CRLF] 1*( SP | HT )
+//
+// Many HTTP/1.1 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 (as defined in section
+// 3.6).
+//
+// token          = 1*<any CHAR except CTLs or separators>
+// separators     = "(" | ")" | "<" | ">" | "@"
+// | "," | ";" | ":" | "\" | <">
+// | "/" | "[" | "]" | "?" | "="
+// | "{" | "}" | SP | HT
+type OctetType byte
+
+// IsChar reports whether octet is CHAR.
+func (t OctetType) IsChar() bool { return t&octetChar != 0 }
+
+// IsControl reports whether octet is CTL.
+func (t OctetType) IsControl() bool { return t&octetControl != 0 }
+
+// IsSeparator reports whether octet is separator.
+func (t OctetType) IsSeparator() bool { return t&octetSeparator != 0 }
+
+// IsSpace reports whether octet is space (SP or HT).
+func (t OctetType) IsSpace() bool { return t&octetSpace != 0 }
+
+// IsToken reports whether octet is token.
+func (t OctetType) IsToken() bool { return t&octetToken != 0 }
+
+const (
+	octetChar OctetType = 1 << iota
+	octetControl
+	octetSpace
+	octetSeparator
+	octetToken
+)
+
+// OctetTypes is a table of octets.
+var OctetTypes [256]OctetType
+
+func init() {
+	for c := 32; c < 256; c++ {
+		var t OctetType
+		if c <= 127 {
+			t |= octetChar
+		}
+		if 0 <= c && c <= 31 || c == 127 {
+			t |= octetControl
+		}
+		switch c {
+		case '(', ')', '<', '>', '@', ',', ';', ':', '"', '/', '[', ']', '?', '=', '{', '}', '\\':
+			t |= octetSeparator
+		case ' ', '\t':
+			t |= octetSpace | octetSeparator
+		}
+
+		if t.IsChar() && !t.IsControl() && !t.IsSeparator() && !t.IsSpace() {
+			t |= octetToken
+		}
+
+		OctetTypes[c] = t
+	}
+}