/// <summary>
/// Read a new Response from the given Protocol
/// </summary>
/// <param name="p">the Protocol object</param>
/// <exception cref="IOException">for I/O errors</exception>
/// <exception cref="ProtocolException">for Protocol failures</exception>
public Response(Protocol p)
{
// read one response into 'buffer'
ByteArray ba = p.GetResponseBuffer();
ByteArray response = p.GetReader().ReadResponse(ba);
buffer = response.Bytes;
size = buffer.Length - 2; // Skip the terminating CRLF
utf8 = p.SupportsUtf8();
parse();
}
/// <exception cref="IOException"></exception>
/// <exception cref="ProtocolException"></exception>
private void nstring(byte[] bytes, Protocol p, bool doQuote)
{
StreamWriter writer = getStreamWriter(p);
int len = bytes.Length;
// If length is greater than 1024 bytes, send as literal
if (len > 1024)
{
literal(bytes, p);
return;
}
// if 0 length, send as quoted-string
bool quote = len == 0 ? true : doQuote;
bool escape = false;
bool utf8 = p.SupportsUtf8();
byte b;
for (int i = 0; i < len; i++)
{
b = bytes[i];
if (b == '\0' || b == '\r' || b == '\n' ||
(!utf8 && ((b & 0xff) > 0177)))
{
// NUL, CR or LF means the bytes need to be sent as literals
literal(bytes, p);
return;
}
if (b == '*' || b == '%' || b == '(' || b == ')' || b == '{' ||
b == '"' || b == '\\' ||
((b & 0xff) <= ' ') || ((b & 0xff) > 0177))
{
quote = true;
if (b == '"' || b == '\\') // need to escape these characters
{
escape = true;
}
}
}
/*
* Make sure the (case-independent) string "NIL" is always quoted,
* so as not to be confused with a real NIL (handled above in nstring).
* This is more than is necessary, but it's rare to begin with and
* this makes it safer than doing the test in nstring above in case
* some code calls writeString when it should call writeNString.
*/
if (!quote && bytes.Length == 3 &&
(bytes[0] == 'N' || bytes[0] == 'n') &&
(bytes[1] == 'I' || bytes[1] == 'i') &&
(bytes[2] == 'L' || bytes[2] == 'l'))
{
quote = true;
}
if (quote) // start quote
{
writer.Write('"');
}
if (escape)
{
// already quoted
for (int i = 0; i < len; i++)
{
b = bytes[i];
if (b == '"' || b == '\\')
{
writer.Write('\\');
}
writer.Write(b);
}
}
else
{
writer.Write(bytes);
}
if (quote) // end quote
{
writer.Write('"');
}
}