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// HTTPConnection.cpp
// Implements the cHTTPConnection class representing a single persistent connection in the HTTP server.
#include "Globals.h"
#include "HTTPConnection.h"
#include "HTTPMessage.h"
#include "HTTPServer.h"
cHTTPConnection::cHTTPConnection(cHTTPServer & a_HTTPServer) :
m_HTTPServer(a_HTTPServer),
m_State(wcsRecvHeaders),
m_CurrentRequest(NULL)
{
}
void cHTTPConnection::SendStatusAndReason(int a_StatusCode, const AString & a_Response)
{
AppendPrintf(m_OutgoingData, "%d %s\r\n\r\n", a_StatusCode, a_Response.c_str());
m_HTTPServer.NotifyConnectionWrite(*this);
}
void cHTTPConnection::Send(const cHTTPResponse & a_Response)
{
ASSERT(m_State = wcsRecvIdle);
a_Response.AppendToData(m_OutgoingData);
m_State = wcsSendingResp;
m_HTTPServer.NotifyConnectionWrite(*this);
}
void cHTTPConnection::Send(const void * a_Data, int a_Size)
{
ASSERT(m_State == wcsSendingResp);
AppendPrintf(m_OutgoingData, "%x\r\n", a_Size);
m_OutgoingData.append((const char *)a_Data, a_Size);
m_OutgoingData.append("\r\n");
m_HTTPServer.NotifyConnectionWrite(*this);
}
void cHTTPConnection::FinishResponse(void)
{
ASSERT(m_State == wcsSendingResp);
m_OutgoingData.append("0\r\n\r\n");
m_State = wcsRecvHeaders;
m_HTTPServer.NotifyConnectionWrite(*this);
}
void cHTTPConnection::AwaitNextRequest(void)
{
switch (m_State)
{
case wcsRecvIdle:
{
// The client is waiting for a response, send an "Internal server error":
m_OutgoingData.append("HTTP/1.1 500 Internal Server Error\r\n\r\n");
m_HTTPServer.NotifyConnectionWrite(*this);
m_State = wcsRecvHeaders;
break;
}
case wcsSendingResp:
{
// The response headers have been sent, we need to terminate the response body:
m_OutgoingData.append("0\r\n\r\n");
m_State = wcsRecvHeaders;
break;
}
default:
{
ASSERT(!"Unhandled state recovery");
break;
}
}
}
void cHTTPConnection::DataReceived(const char * a_Data, int a_Size)
{
switch (m_State)
{
case wcsRecvHeaders:
{
ASSERT(m_CurrentRequest == NULL);
// Start searching 3 chars from the end of the already received data, if available:
size_t SearchStart = m_IncomingHeaderData.size();
SearchStart = (SearchStart > 3) ? SearchStart - 3 : 0;
m_IncomingHeaderData.append(a_Data, a_Size);
// Parse the header, if it is complete:
size_t idxEnd = m_IncomingHeaderData.find("\r\n\r\n", SearchStart);
if (idxEnd == AString::npos)
{
return;
}
m_CurrentRequest = new cHTTPRequest;
if (!m_CurrentRequest->ParseHeaders(m_IncomingHeaderData.c_str(), idxEnd + 2))
{
delete m_CurrentRequest;
m_CurrentRequest = NULL;
m_State = wcsInvalid;
m_HTTPServer.CloseConnection(*this);
return;
}
m_State = wcsRecvBody;
m_HTTPServer.NewRequest(*this, *m_CurrentRequest);
m_CurrentRequestBodyRemaining = m_CurrentRequest->GetContentLength();
// Process the rest of the incoming data into the request body:
if (m_IncomingHeaderData.size() > idxEnd + 4)
{
m_IncomingHeaderData.erase(0, idxEnd + 4);
DataReceived(m_IncomingHeaderData.c_str(), m_IncomingHeaderData.size());
m_IncomingHeaderData.clear();
}
else
{
m_IncomingHeaderData.clear();
DataReceived("", 0); // If the request has zero body length, let it be processed right-away
}
break;
}
case wcsRecvBody:
{
ASSERT(m_CurrentRequest != NULL);
if (m_CurrentRequestBodyRemaining > 0)
{
int BytesToConsume = std::min(m_CurrentRequestBodyRemaining, a_Size);
m_HTTPServer.RequestBody(*this, *m_CurrentRequest, a_Data, BytesToConsume);
m_CurrentRequestBodyRemaining -= BytesToConsume;
}
if (m_CurrentRequestBodyRemaining == 0)
{
m_State = wcsRecvIdle;
m_HTTPServer.RequestFinished(*this, *m_CurrentRequest);
delete m_CurrentRequest;
m_CurrentRequest = NULL;
}
break;
}
default:
{
// TODO: Should we be receiving data in this state?
break;
}
}
}
void cHTTPConnection::GetOutgoingData(AString & a_Data)
{
std::swap(a_Data, m_OutgoingData);
}
void cHTTPConnection::SocketClosed(void)
{
if (m_CurrentRequest != NULL)
{
m_HTTPServer.RequestFinished(*this, *m_CurrentRequest);
}
}
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