C++ buffer_ptr_t::beginSegment方法代码示例

// virtual
LLIOPipe::EStatus LLContextURLExtractor::process_impl(
	const LLChannelDescriptors& channels,
	buffer_ptr_t& buffer,
	bool& eos,
	LLSD& context,
	LLPumpIO* pump)
{
	PUMP_DEBUG;
	LLMemType m1(LLMemType::MTYPE_IO_URL_REQUEST);
	// The destination host is in the context.
	if(context.isUndefined() || !mRequest)
	{
		return STATUS_PRECONDITION_NOT_MET;
	}

	// copy in to out, since this just extract the URL and does not
	// actually change the data.
	LLChangeChannel change(channels.in(), channels.out());
	std::for_each(buffer->beginSegment(), buffer->endSegment(), change);

	// find the context url
	if(context.has(CONTEXT_DEST_URI_SD_LABEL))
	{
		mRequest->setURL(context[CONTEXT_DEST_URI_SD_LABEL].asString());
		return STATUS_DONE;
	}
	return STATUS_ERROR;
}

// virtual
LLIOPipe::EStatus LLHTTPResponseHeader::process_impl(
	const LLChannelDescriptors& channels,
	buffer_ptr_t& buffer,
	bool& eos,
	LLSD& context,
	LLPumpIO* pump)
{
	PUMP_DEBUG;
	LLMemType m1(LLMemType::MTYPE_IO_HTTP_SERVER);
	if(eos)
	{
		PUMP_DEBUG;
		//mGotEOS = true;
		std::ostringstream ostr;
		std::string message = context[CONTEXT_RESPONSE]["statusMessage"];
		
		int code = context[CONTEXT_RESPONSE]["statusCode"];
		if (code < 200)
		{
			code = 200;
			message = "OK";
		}
		
		ostr << HTTP_VERSION_STR << " " << code << " " << message << "\r\n";
		S32 content_length = buffer->countAfter(channels.in(), NULL);
		if(0 < content_length)
		{
			ostr << "Content-Length: " << content_length << "\r\n";
		}
		// *NOTE: This guard can go away once the LLSD static map
		// iterator is available. Phoenix. 2008-05-09
		LLSD headers = context[CONTEXT_RESPONSE][CONTEXT_HEADERS];
		if(headers.isDefined())
		{
			LLSD::map_iterator iter = headers.beginMap();
			LLSD::map_iterator end = headers.endMap();
			for(; iter != end; ++iter)
			{
				ostr << (*iter).first << ": " << (*iter).second.asString()
					<< "\r\n";
			}
		}
		ostr << "\r\n";

		LLChangeChannel change(channels.in(), channels.out());
		std::for_each(buffer->beginSegment(), buffer->endSegment(), change);
		std::string header = ostr.str();
		buffer->prepend(channels.out(), (U8*)header.c_str(), header.size());
		PUMP_DEBUG;
		return STATUS_DONE;
	}
	PUMP_DEBUG;
	return STATUS_OK;
}

// virtual
LLIOPipe::EStatus LLHTTPResponseHeader::process_impl(
	const LLChannelDescriptors& channels,
	buffer_ptr_t& buffer,
	bool& eos,
	LLSD& context,
	LLPumpIO* pump)
{
	PUMP_DEBUG;
	LLMemType m1(LLMemType::MTYPE_IO_HTTP_SERVER);
	if(eos)
	{
		PUMP_DEBUG;
		//mGotEOS = true;
		std::ostringstream ostr;
		std::string message = context["response"]["statusMessage"];
		
		int code = context["response"]["statusCode"];
		if (code < 200)
		{
			code = 200;
			message = "OK";
		}
		
		ostr << HTTP_VERSION_STR << " " << code << " " << message << "\r\n";
		
		std::string type = context["response"]["contentType"].asString();
		if (!type.empty())
		{
			ostr << "Content-Type: " << type << "\r\n";
		}
		S32 content_length = buffer->countAfter(channels.in(), NULL);
		if(0 < content_length)
		{
			ostr << "Content-Length: " << content_length << "\r\n";
		}
		ostr << "\r\n";

		LLChangeChannel change(channels.in(), channels.out());
		std::for_each(buffer->beginSegment(), buffer->endSegment(), change);
		std::string header = ostr.str();
		buffer->prepend(channels.out(), (U8*)header.c_str(), header.size());
		PUMP_DEBUG;
		return STATUS_DONE;
	}
	PUMP_DEBUG;
	return STATUS_OK;
}

void XMLRPCResponder::completedRaw(U32 status, std::string const& reason, LLChannelDescriptors const& channels, buffer_ptr_t const& buffer)
{
	if (mCode == CURLE_OK && !is_internal_http_error(status))
	{
		mBufferSize = buffer->count(channels.in());
		if (200 <= status && status < 400)
		{
			char* ptr = NULL;
			char* buf = NULL;
			LLMutexLock lock(buffer->getMutex());
			LLBufferArray::const_segment_iterator_t const end = buffer->endSegment();
			for (LLBufferArray::const_segment_iterator_t iter = buffer->beginSegment(); iter != end; ++iter)
			{
				LLSegment const& segment = *iter;
				if (segment.isOnChannel(channels.in()))
				{
					S32 const segment_size = segment.size();
					if (!buf)
					{
						if (segment_size == mBufferSize)
						{
							// It's contiguous, no need for copying.
							mResponse = XMLRPC_REQUEST_FromXML((char const*)segment.data(), mBufferSize, NULL);
							break;
						}
						ptr = buf = new char [mBufferSize];
					}
					llassert(ptr + segment_size <= buf + mBufferSize);
					memcpy(ptr, segment.data(), segment_size);
					ptr += segment_size;
				}
			}
			if (buf)
			{
				mResponse = XMLRPC_REQUEST_FromXML(buf, mBufferSize, NULL);
				delete [] buf;
			}
		}
	}
}