CheckBadHeaderValueChars() [2/2]

static string System.Net.HttpValidationHelpers.CheckBadHeaderValueChars ( string value )

inlinestatic

Definition at line 32 of file HttpValidationHelpers.cs.

    {
        if (string.IsNullOrEmpty(value))
        {
            return string.Empty;
        }
        value = value.Trim(s_httpTrimCharacters);
        int num = 0;
        for (int i = 0; i < value.Length; i++)
        {
            char c = (char)(0xFFu & value[i]);
            switch (num)
            {
            case 0:
                if (c == '\r')
                {
                    num = 1;
                }
                else if (c == '\n')
                {
                    num = 2;
                }
                else if (c == '\u007f' || (c < ' ' && c != '\t'))
                {
                    throw new ArgumentException(System.SR.net_WebHeaderInvalidControlChars, "value");
                }
                break;
            case 1:
                if (c == '\n')
                {
                    num = 2;
                    break;
                }
                throw new ArgumentException(System.SR.net_WebHeaderInvalidCRLFChars, "value");
            case 2:
                if (c == ' ' || c == '\t')
                {
                    num = 0;
                    break;
                }
                throw new ArgumentException(System.SR.net_WebHeaderInvalidControlChars, "value");
            }
        }
        if (num != 0)
        {
            throw new ArgumentException(System.SR.net_WebHeaderInvalidCRLFChars, "value");
        }
        return value;
    }

References System.SR.net_WebHeaderInvalidControlChars, System.SR.net_WebHeaderInvalidCRLFChars, System.Net.HttpValidationHelpers.s_httpTrimCharacters, and System.value.