// HTTPMessage.cpp

// Declares the cHTTPMessage class representing the common ancestor for HTTP request and response classes

#include "Globals.h"
#include "HTTPMessage.h"





// Disable MSVC warnings:
#if defined(_MSC_VER)
	#pragma warning(push)
	#pragma warning(disable:4355)  // 'this' : used in base member initializer list
#endif





////////////////////////////////////////////////////////////////////////////////
// cHTTPMessage:

cHTTPMessage::cHTTPMessage(eKind a_Kind) :
	m_Kind(a_Kind),
	m_ContentLength(AString::npos)
{
}





void cHTTPMessage::AddHeader(const AString & a_Key, const AString & a_Value)
{
	auto Key = StrToLower(a_Key);
	auto itr = m_Headers.find(Key);
	if (itr == m_Headers.end())
	{
		m_Headers[Key] = a_Value;
	}
	else
	{
		// The header-field key is specified multiple times, combine into comma-separated list (RFC 2616 @ 4.2)
		itr->second.append(", ");
		itr->second.append(a_Value);
	}

	// Special processing for well-known headers:
	if (Key == "content-type")
	{
		m_ContentType = m_Headers[Key];
	}
	else if (Key == "content-length")
	{
		if (!StringToInteger(m_Headers[Key], m_ContentLength))
		{
			m_ContentLength = 0;
		}
	}
}





////////////////////////////////////////////////////////////////////////////////
// cHTTPResponse:

cHTTPResponse::cHTTPResponse(void) :
	super(mkResponse)
{
}





void cHTTPResponse::AppendToData(AString & a_DataStream) const
{
	a_DataStream.append("HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\nContent-Type: ");
	a_DataStream.append(m_ContentType);
	a_DataStream.append("\r\n");
	for (auto itr = m_Headers.cbegin(), end = m_Headers.cend(); itr != end; ++itr)
	{
		if ((itr->first == "Content-Type") || (itr->first == "Content-Length"))
		{
			continue;
		}
		a_DataStream.append(itr->first);
		a_DataStream.append(": ");
		a_DataStream.append(itr->second);
		a_DataStream.append("\r\n");
	}  // for itr - m_Headers[]
	a_DataStream.append("\r\n");
}