C++ buffer_ptr_t::readAfter方法代码示例

bool LLHTTPResponder::readLine(
	const LLChannelDescriptors& channels,
	buffer_ptr_t buffer,
	U8* dest,
	S32& len)
{
	LLMemType m1(LLMemType::MTYPE_IO_HTTP_SERVER);
	--len;
	U8* last = buffer->readAfter(channels.in(), mLastRead, dest, len);
	dest[len] = '\0';
	U8* newline = (U8*)strchr((char*)dest, '\n');
	if(!newline)
	{
		if(len)
		{
			lldebugs << "readLine failed - too long maybe?" << llendl;
			markBad(channels, buffer);
		}
		return false;
	}
	S32 offset = -((len - 1) - (newline - dest));
	++newline;
	*newline = '\0';
	mLastRead = buffer->seek(channels.in(), last, offset);
	return true;
}

LLIOPipe::EStatus LLFilterXMLRPCRequest2LLSD::process_impl(
	const LLChannelDescriptors& channels,
	buffer_ptr_t& buffer,
	bool& eos,
	LLSD& context,
	LLPumpIO* pump)
{
	LLFastTimer t(FTM_PROCESS_XMLRPC2LLSD_REQUEST);
	PUMP_DEBUG;
	if(!eos) return STATUS_BREAK;
	if(!buffer) return STATUS_ERROR;

	PUMP_DEBUG;
	// *FIX: This technique for reading data is far from optimal. We
	// need to have some kind of istream interface into the xml
	// parser...
	S32 bytes = buffer->countAfter(channels.in(), NULL);
	if(!bytes) return STATUS_ERROR;
	char* buf = new char[bytes + 1];
	buf[bytes] = '\0';
	buffer->readAfter(channels.in(), NULL, (U8*)buf, bytes);

	//lldebugs << "xmlrpc request: " << buf << llendl;
	
	// Check the value in the buffer. XMLRPC_REQUEST_FromXML will report a error code 4 if 
	// values that are less than 0x20 are passed to it, except
	// 0x09: Horizontal tab; 0x0a: New Line; 0x0d: Carriage
	U8* cur_pBuf = (U8*)buf;
    U8 cur_char;
	for (S32 i=0; i<bytes; i++) 
	{
        cur_char = *cur_pBuf;
		if (   cur_char < 0x20
            && 0x09 != cur_char
            && 0x0a != cur_char
            && 0x0d != cur_char )
        {
			*cur_pBuf = '?';
        }
		++cur_pBuf;
	}

	PUMP_DEBUG;
	XMLRPC_REQUEST request = XMLRPC_REQUEST_FromXML(
		buf,
		bytes,
		NULL);
	if(!request)
	{
		llwarns << "XML -> SD Request process parse error." << llendl;
		delete[] buf;
		return STATUS_ERROR;
	}

	PUMP_DEBUG;
	LLBufferStream stream(channels, buffer.get());
	stream.precision(DEFAULT_PRECISION);
	const char* name = XMLRPC_RequestGetMethodName(request);
	stream << LLSDRPC_REQUEST_HEADER_1 << (name ? name : "")
		   << LLSDRPC_REQUEST_HEADER_2;
	XMLRPC_VALUE param = XMLRPC_RequestGetData(request);
	if(param)
	{
		PUMP_DEBUG;
		S32 size = XMLRPC_VectorSize(param);
		if(size > 1)
		{
			// if there are multiple parameters, stuff the values into
			// an array so that the next step in the chain can read them.
			stream << "[";
		}
 		XMLRPC_VALUE current = XMLRPC_VectorRewind(param);
		bool needs_comma = false;
 		while(current)
 		{
			if(needs_comma)
			{
				stream << ",";
			}
			needs_comma = true;
 			stream_out(stream, current);
 			current = XMLRPC_VectorNext(param);
 		}
		if(size > 1)
		{
			// close the array
			stream << "]";
		}
	}
	stream << LLSDRPC_REQUEST_FOOTER << std::flush;
	XMLRPC_RequestFree(request, 1);
	delete[] buf;
	PUMP_DEBUG;
	return STATUS_DONE;
}