CExternalIPResolver::CExternalIPResolver(wxEvtHandler* handler, int id /*=wxID_ANY*/)
: m_handler(handler), m_id(id)
{
m_pSocket = 0;
m_done = false;
m_pSendBuffer = 0;
m_sendBufferPos = 0;
m_pRecvBuffer = 0;
m_recvBufferPos = 0;
ResetHttpData(true);
}
void CExternalIPResolver::OnHeader()
{
// Parse the HTTP header.
// We do just the neccessary parsing and silently ignore most header fields
// Redirects are supported though if the server sends the Location field.
while (true)
{
// Find line ending
unsigned int i = 0;
for (i = 0; (i + 1) < m_recvBufferPos; i++)
{
if (m_pRecvBuffer[i] == '\r')
{
if (m_pRecvBuffer[i + 1] != '\n')
{
Close(false);
return;
}
break;
}
}
if ((i + 1) >= m_recvBufferPos)
{
if (m_recvBufferPos == m_recvBufferLen)
{
// We don't support header lines larger than 4096
Close(false);
return;
}
return;
}
m_pRecvBuffer[i] = 0;
if (!m_responseCode)
{
m_responseString = wxString(m_pRecvBuffer, wxConvLocal);
if (m_recvBufferPos < 16 || memcmp(m_pRecvBuffer, "HTTP/1.", 7))
{
// Invalid HTTP Status-Line
Close(false);
return;
}
if (m_pRecvBuffer[9] < '1' || m_pRecvBuffer[9] > '5' ||
m_pRecvBuffer[10] < '0' || m_pRecvBuffer[10] > '9' ||
m_pRecvBuffer[11] < '0' || m_pRecvBuffer[11] > '9')
{
// Invalid response code
Close(false);
return;
}
m_responseCode = (m_pRecvBuffer[9] - '0') * 100 + (m_pRecvBuffer[10] - '0') * 10 + m_pRecvBuffer[11] - '0';
if (m_responseCode >= 400)
{
// Failed request
Close(false);
return;
}
if (m_responseCode == 305)
{
// Unsupported redirect
Close(false);
return;
}
}
else
{
if (!i)
{
// End of header, data from now on
// Redirect if neccessary
if (m_responseCode >= 300)
{
delete m_pSocket;
m_pSocket = 0;
delete [] m_pRecvBuffer;
m_pRecvBuffer = 0;
wxString location = m_location;
ResetHttpData(false);
GetExternalIP(location, m_protocol);
return;
}
m_gotHeader = true;
memmove(m_pRecvBuffer, m_pRecvBuffer + 2, m_recvBufferPos - 2);
m_recvBufferPos -= 2;
if (m_recvBufferPos)
{
if (m_transferEncoding == chunked)
OnChunkedData();
else
OnData(m_pRecvBuffer, m_recvBufferPos);
}
return;
}
if (m_recvBufferPos > 12 && !memcmp(m_pRecvBuffer, "Location: ", 10))
{
m_location = wxString(m_pRecvBuffer + 10, wxConvLocal);
}
else if (m_recvBufferPos > 21 && !memcmp(m_pRecvBuffer, "Transfer-Encoding: ", 19))
{
if (!strcmp(m_pRecvBuffer + 19, "chunked"))
m_transferEncoding = chunked;
else if (!strcmp(m_pRecvBuffer + 19, "identity"))
m_transferEncoding = identity;
else
m_transferEncoding = unknown;
}
}
memmove(m_pRecvBuffer, m_pRecvBuffer + i + 2, m_recvBufferPos - i - 2);
m_recvBufferPos -= i + 2;
if (!m_recvBufferPos)
break;
}
}
int CHttpControlSocket::ParseHeader(CHttpOpData* pData)
{
// Parse the HTTP header.
// We do just the neccessary parsing and silently ignore most header fields
// Redirects are supported though if the server sends the Location field.
for (;;)
{
// Find line ending
unsigned int i = 0;
for (i = 0; (i + 1) < m_recvBufferPos; i++)
{
if (m_pRecvBuffer[i] == '\r')
{
if (m_pRecvBuffer[i + 1] != '\n')
{
LogMessage(::Error, _("Malformed reply, server not sending proper line endings"));
ResetOperation(FZ_REPLY_ERROR);
return FZ_REPLY_ERROR;
}
break;
}
}
if ((i + 1) >= m_recvBufferPos)
{
if (m_recvBufferPos == m_recvBufferLen)
{
// We don't support header lines larger than 4096
LogMessage(::Error, _("Too long header line"));
ResetOperation(FZ_REPLY_ERROR);
return FZ_REPLY_ERROR;
}
return FZ_REPLY_WOULDBLOCK;
}
m_pRecvBuffer[i] = 0;
const wxString& line = wxString(m_pRecvBuffer, wxConvLocal);
if (line != _T(""))
LogMessageRaw(Response, line);
if (pData->m_responseCode == -1)
{
pData->m_responseString = line;
if (m_recvBufferPos < 16 || memcmp(m_pRecvBuffer, "HTTP/1.", 7))
{
// Invalid HTTP Status-Line
LogMessage(::Error, _("Invalid HTTP Response"));
ResetOperation(FZ_REPLY_ERROR);
return FZ_REPLY_ERROR;
}
if (m_pRecvBuffer[9] < '1' || m_pRecvBuffer[9] > '5' ||
m_pRecvBuffer[10] < '0' || m_pRecvBuffer[10] > '9' ||
m_pRecvBuffer[11] < '0' || m_pRecvBuffer[11] > '9')
{
// Invalid response code
LogMessage(::Error, _("Invalid response code"));
ResetOperation(FZ_REPLY_ERROR);
return FZ_REPLY_ERROR;
}
pData->m_responseCode = (m_pRecvBuffer[9] - '0') * 100 + (m_pRecvBuffer[10] - '0') * 10 + m_pRecvBuffer[11] - '0';
if (pData->m_responseCode >= 400)
{
// Failed request
ResetOperation(FZ_REPLY_ERROR);
return FZ_REPLY_ERROR;
}
if (pData->m_responseCode == 305)
{
// Unsupported redirect
LogMessage(::Error, _("Unsupported redirect"));
ResetOperation(FZ_REPLY_ERROR);
return FZ_REPLY_ERROR;
}
}
else
{
if (!i)
{
// End of header, data from now on
// Redirect if neccessary
if (pData->m_responseCode >= 300)
{
if (pData->m_redirectionCount++ == 5)
{
LogMessage(::Error, _("Too many redirects"));
ResetOperation(FZ_REPLY_ERROR);
return FZ_REPLY_ERROR;
}
ResetSocket();
ResetHttpData(pData);
wxString host;
enum ServerProtocol protocol;
int pos;
if ((pos = pData->m_newLocation.Find(_T("://"))) != -1)
{
protocol = CServer::GetProtocolFromPrefix(pData->m_newLocation.Left(pos));
host = pData->m_newLocation.Mid(pos + 3);
}
else
{
protocol = HTTP;
host = pData->m_newLocation;
}
if ((pos = host.Find(_T("/"))) != -1)
host = host.Left(pos);
unsigned long port;
if ((pos = host.Find(':', true)) != -1)
{
wxString strport = host.Mid(pos + 1);
if (!strport.ToULong(&port) || port < 1 || port > 65535)
{
if (protocol == HTTPS)
port = 443;
else
port = 80;
}
host = host.Left(pos);
}
else
{
if (protocol == HTTPS)
port = 443;
else
port = 80;
}
if (host == _T(""))
{
// Unsupported redirect
LogMessage(::Error, _("Redirection to invalid address"));
ResetOperation(FZ_REPLY_ERROR);
return FZ_REPLY_ERROR;
}
pData->m_newHostWithPort = wxString::Format(_T("%s:%d"), host.c_str(), (int)port);
// International domain names
host = ConvertDomainName(host);
int res = InternalConnect(host, port, protocol == HTTPS);
if (res == FZ_REPLY_WOULDBLOCK)
res |= FZ_REPLY_REDIRECTED;
return res;
}
pData->m_gotHeader = true;
memmove(m_pRecvBuffer, m_pRecvBuffer + 2, m_recvBufferPos - 2);
m_recvBufferPos -= 2;
if (m_recvBufferPos)
{
int res;
if (pData->m_transferEncoding == pData->chunked)
res = OnChunkedData(pData);
else
{
pData->m_receivedData += m_recvBufferPos;
res = ProcessData(m_pRecvBuffer, m_recvBufferPos);
m_recvBufferPos = 0;
}
return res;
}
return FZ_REPLY_WOULDBLOCK;
}
if (m_recvBufferPos > 12 && !memcmp(m_pRecvBuffer, "Location: ", 10))
{
pData->m_newLocation = wxString(m_pRecvBuffer + 10, wxConvLocal);
}
else if (m_recvBufferPos > 21 && !memcmp(m_pRecvBuffer, "Transfer-Encoding: ", 19))
{
if (!strcmp(m_pRecvBuffer + 19, "chunked"))
pData->m_transferEncoding = CHttpOpData::chunked;
else if (!strcmp(m_pRecvBuffer + 19, "identity"))
pData->m_transferEncoding = CHttpOpData::identity;
else
pData->m_transferEncoding = CHttpOpData::unknown;
}
else if (i > 16 && !memcmp(m_pRecvBuffer, "Content-Length: ", 16))
{
pData->m_totalSize = 0;
char* p = m_pRecvBuffer + 16;
while (*p)
{
if (*p < '0' || *p > '9')
{
LogMessage(::Error, _("Malformed header: %s"), _("Invalid Content-Length"));
ResetOperation(FZ_REPLY_ERROR);
return FZ_REPLY_ERROR;
}
pData->m_totalSize = pData->m_totalSize * 10 + *p++ - '0';
}
}
}
memmove(m_pRecvBuffer, m_pRecvBuffer + i + 2, m_recvBufferPos - i - 2);
m_recvBufferPos -= i + 2;
if (!m_recvBufferPos)
break;
}
return FZ_REPLY_WOULDBLOCK;
}
