Function parseKeywordValueSettings

pgconn/config.go:686–752

(s string)

var asciiSpace = [256]uint8{'\t': 1, '\n': 1, '\v': 1, '\f': 1, '\r': 1, ' ': 1}

func parseKeywordValueSettings(s string) (map[string]string, error) {
	settings := make(map[string]string)

	// Trim any leading whitespace so that the loop exits cleanly when only
	// spaces remain (e.g. trailing spaces after the last value).
	s = strings.TrimLeft(s, " \t\n\r\v\f")
	for len(s) > 0 {
		var key, val string
		eqIdx := strings.IndexRune(s, '=')
		if eqIdx < 0 {
			return nil, errors.New("invalid keyword/value")
		}

		key = strings.Trim(s[:eqIdx], " \t\n\r\v\f")
		s = strings.TrimLeft(s[eqIdx+1:], " \t\n\r\v\f")
		switch {
		case len(s) == 0:
		case s[0] != '\'':
			end := 0
			for ; end < len(s); end++ {
				if asciiSpace[s[end]] == 1 {
					break
				}
				if s[end] == '\\' {
					end++
					if end == len(s) {
						return nil, errors.New("invalid backslash")
					}
				}
			}
			val = strings.ReplaceAll(strings.ReplaceAll(s[:end], "\\\\", "\\"), "\\'", "'")
			// Consume the value and trim any subsequent whitespace so that
			// multiple trailing spaces don't cause a spurious parse failure.
			s = strings.TrimLeft(s[end:], " \t\n\r\v\f")
		default: // quoted string
			s = s[1:]
			end := 0
			for ; end < len(s); end++ {
				if s[end] == '\'' {
					break
				}
				if s[end] == '\\' {
					end++
				}
			}
			if end == len(s) {
				return nil, errors.New("unterminated quoted string in connection info string")
			}
			val = strings.ReplaceAll(strings.ReplaceAll(s[:end], "\\\\", "\\"), "\\'", "'")
			// Consume the closing quote and any subsequent whitespace.
			s = strings.TrimLeft(s[end+1:], " \t\n\r\v\f")
		}

		key = canonicalConnStringKey(key)

		if key == "" {
			return nil, errors.New("invalid keyword/value")
		}