GetProductInfoLength() static private method

static private GetProductInfoLength ( string input, int startIndex, ProductInfoHeaderValue &parsedValue ) : int
input string
startIndex int
parsedValue ProductInfoHeaderValue
return int
ProductInfoHeaderValue Class Documentation
Example #1
0
        public override bool TryParseValue(string value, object storeValue, ref int index, out object parsedValue)
        {
            parsedValue = null;

            if (string.IsNullOrEmpty(value) || (index == value.Length))
            {
                return(false);
            }

            // Skip leading whitespace
            int current = index + HttpRuleParser.GetWhitespaceLength(value, index);

            if (current == value.Length)
            {
                return(false); // whitespace-only values are not valid
            }

            ProductInfoHeaderValue result = null;
            int length = ProductInfoHeaderValue.GetProductInfoLength(value, current, out result);

            if (length == 0)
            {
                return(false);
            }

            // GetProductInfoLength() already skipped trailing whitespace. No need to do it here again.
            current = current + length;

            // If we have more values, make sure we saw a whitespace before. Values like "product/1.0(comment)" are
            // invalid since there must be a whitespace between the product and the comment value.
            if (current < value.Length)
            {
                // Note that for \r\n to be a valid whitespace, it must be followed by a space/tab. I.e. it's enough if
                // we check whether the char before the next value is space/tab.
                char lastSeparatorChar = value[current - 1];
                if ((lastSeparatorChar != ' ') && (lastSeparatorChar != '\t'))
                {
                    return(false);
                }
            }

            // Separators for "User-Agent" and "Server" headers are whitespace. This is different from most other headers
            // where comma/semicolon is used as separator.
            index       = current;
            parsedValue = result;
            return(true);
        }