Method ReadHttpHeaderLine

deps/FtpClient/BlockingSocket.cpp:401–437

}

int CHttpBlockingSocket::ReadHttpHeaderLine(char* pch, int nSize, int nSecs)
  // reads an entire header line through CRLF (or socket close)
  // inserts zero string terminator, object maintains a buffer
{
  int       nBytesThisTime = m_nReadBuf;
  ptrdiff_t nLineLength    = 0;
  char*     pch1           = m_pReadBuf;
  char*     pch2           = NULL;

  do
  {
    // look for lf (assume preceded by cr)
    if( (pch2=(LPSTR)memchr(pch1 , '\n', nBytesThisTime))!=NULL )
    {
      ASSERT( (pch2)>m_pReadBuf );
      ASSERT( *(pch2 - 1)=='\r' );
      nLineLength = (pch2 - m_pReadBuf) + 1;
      if( nLineLength>=nSize )
        nLineLength = nSize - 1;
      memcpy(pch, m_pReadBuf, nLineLength); // copy the line to caller
      m_nReadBuf -= static_cast<unsigned int>(nLineLength);
      memmove(m_pReadBuf, pch2 + 1, m_nReadBuf); // shift remaining characters left
      break;
    }
    pch1 += nBytesThisTime;
    nBytesThisTime = Receive(m_pReadBuf + m_nReadBuf, nSizeRecv - m_nReadBuf, nSecs);
    if( nBytesThisTime<=0 )
    { // sender closed socket or line longer than buffer
      throw CBlockingSocketException(_T("ReadHeaderLine"));
    }
    m_nReadBuf += nBytesThisTime;
  } while( true );

  *(pch + nLineLength) = _T('\0');

  return static_cast<unsigned int>(nLineLength);
}

// reads remainder of a transmission through buffer full or socket close
// (assume headers have been read already)