snoopio.cpp

mini http server,可以集成嵌入到程序中,实现简单的web功能

/*____________________________________________________________________________*\
 *

 Copyright (c) 1997-2003 John Roy, Holger Zimmermann. All rights reserved.

 These sources, libraries and applications are
 FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
 as long as the following conditions are adhered to.

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    notice, this list of conditions and the following disclaimer. 

 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in
    the documentation and/or other materials provided with the
    distribution.

 3. The name of the author may not be used to endorse or promote products
    derived from this software without specific prior written permission.

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 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 *____________________________________________________________________________*|
 *
 * $Source: /cvsroot/pi3web/Pi3Web_200/Source/IO/SnoopIO.cpp,v $
 * $Date: 2003/05/13 18:42:04 $
 *
 Description:
	Acts as a link in an IO chain and monitors construction and
	destruction of IO objects as well as IO transactions.
\*____________________________________________________________________________*/
/* $SourceTop:$ */

#include <assert.h>
#include <iostream.h>
#include <time.h>
#include <ctype.h>
#include <string.h>
#include <stdio.h>

#if defined(CONFIG_83HEADERS)
#	include <strstrea.h>
#else
#	include <strstream.h>
#endif
#include <fstream.h>

#include "Pi2API.h"

/* --- Values from configuration file --- */
#define KEY_CONF_IOOBJECT		"IOObject"
#define KEY_CONF_OUTFILE		"OutFile"
#define KEY_CONF_FLAG			"Flag"
#define VALUE_VERBOSE			"Verbose"

/* --- other macros --- */
#define CONFIG_ERR(this, msg, arg)   \
	{ PILog_addMessage( PIObject_getDB(this), \
	PIObject_getConfigurationDB(this), PILOG_ERROR, "%s"##msg, arg ); }

/*____________________________________________________________________________*\
 Description:
	Documentation for this IO object.
\*____________________________________________________________________________*/

#if 0
/*___+++HTMLDOC_BEGIN+++___*/
Name:
	SnoopIO

Description:
	Acts as a link in an IO chain and monitors construction and
	destruction of IO objects as well as IO transactions.

Options:
<H5>Overview</H5>
<TABLE BORDER=1>
<TH>Option
<TH>Default
<TH>Values
<TH>Short Description
<TH>Example(s)

<TR>
<TD>IOObject
<TD>+
<TD>Object name
<TD>Lower level IO object
<TD>IOObject="TCPIPIOObject"

<TR>
<TD>OutFile
<TD>+
<TD>&lt;filename&gt;
<TD>An output filename
<TD>OutFile="../Logs/snoop.txt"

<TR>
<TD>Flag
<TD>-
<TD>Verbose
<TD>A flag
<TD>Flag="Verbose"

</TABLE>
<STRONG>-</STRONG> in the <IT>default</IT> indicates no default<BR>
<STRONG>+</STRONG> in the <IT>default</IT> indicates the field is mandatory<BR>

<H4>Description of Options</H4>
<H5>IOObject</H5>
Lower level IO object which will be loaded to monitor traffic 
through this IO layer.

<H5>OutFile</H5>
A file to write IO transaction debugging information to. The path
should be absolute or relative to the current directory.

<H5>Flag</H5>
Specify a flag which effects the behaviour of this object. This 
directive can be repeated multiple times to specify different flags. 
The 'verbose' flag causes IO traffic to be logged in verbose format, 
writing the data contents in the logfile.

Returns:
	PIAPI_COMPLETED on success.
	PIAPI_ERROR and PIAPI_ABORT respectively for generic and severe
	error conditions.

Example:
	<PRE>

	&lt;Object&gt;
		Name SnoopIO
		Class SnoopIOClass
		IOObject DefaultIOObject
		OutFile "../Logs/snoop.log"
	&lt;/Object&gt;

	</PRE>
/*___+++HTMLDOC_END+++___*/
#endif

/*____________________________________________________________________________*\
 *
 Class:
 Description:
\*____________________________________________________________________________*/
class SnoopIO
{
private:
	PIObject *pObject;
	PIObject *pIOObject;
	ofstream *pOfs;
	ofstream *pOfsToDelete;
	const char *pOutFile;
	PIDB *pSaveDB;				/* save initial DB */
	PISync *pMutex;				/* mutex to synchronize access to log */
	int iPrototype;				/* true if this is prototype object */
	int iVerbose;				/* verbose flag */
    int iOK;                    /* success flag */
	
	/* --- private methods --- */
	ostream &Os()	{ assert( pOfs ); return *pOfs; };	
#define SNOOP( pObj, pDesc, pBuf, iTryLen, iDoneLen, iStatus ) \
	{ \
	PISync_lock( pMutex ); \
	Os().width( 10 ); Os() << (int)(PIThread_getSystemHandle(PIThread_getCurrent())); \
/* \
	time_t __tT; time( &__tT ); \
	Os().width( 12 ); Os() << (unsigned long)__tT << ":"; \
	Os().flags( ios::right ); \
	Os().width( 12 ); Os() << (void *)pObj; \
*/ \
	Os().width( 5 ); Os() << pDesc << " "; \
	Os().width( 12 ); Os() << pBuf << " "; \
	Os().width( 7 ); Os() << iTryLen; \
	Os().width( 7 ); Os() << iDoneLen; \
	Os().width( 5 ); Os() << iStatus; \
	Os() << endl; \
	PISync_unlock( pMutex ); \
	}

	int Parameter( const char *pVar, const char *pVal, const char *pWhere )
		{
		assert( pVar && pVal );
		if ( !( pVar && pVal ) )
			{ return 0; };
		if ( !PIUtil_stricmp( pVar, KEY_CONF_IOOBJECT ) )
			{
			pIOObject = PIObject_loadFromLine( 
				PIObject_getDB( pObject ),
				PIObject_getConfigurationDB( pObject ),
				pVal );
			if ( !pIOObject )
				{ return 0; };
			}
		else if ( !PIUtil_stricmp( pVar, KEY_CONF_OUTFILE ) )
			{
			pOutFile = pVal;
			pOfs = new ofstream( pOutFile );
			if ( !pOfs->good() ) { delete pOfs; pOfs=0; };
			pOfsToDelete = pOfs;
			if ( !pOfs )
				{
                CONFIG_ERR( pObject, "SnoopIO: output file could not \
be opened.", pWhere );
                return 0;
				};
			}
		else if ( !PIUtil_stricmp( pVar, KEY_CONF_FLAG ) )
			{
			if ( !PIUtil_stricmp( pVal, VALUE_VERBOSE ) )
				{ iVerbose = 1; }
			else
				{
				ostrstream os;
				os << pWhere << "SnoopIO: Unknown flag '" << pVal << "'"
					<< ends;
				char *pPtr = os.str();
				CONFIG_ERR( pObject, "", pPtr );
				delete [] pPtr;
				return 0;
				};
			}
		else
			{
			ostrstream os;
			os << pWhere << "SnoopIO: Unknown parameter '" << pVar << "'"
				<< ends;
			char *pPtr = os.str();
			CONFIG_ERR( pObject, "", pPtr );
			delete [] pPtr;
			return 0;
			};
		return 1;
		};

	static int ParameterFn( void *pData, const char *pVar, const char *pVal,
		const char *pWhere )
		{ return ((SnoopIO *)pData)->Parameter( pVar, pVal, pWhere ); };
	

	/* --- */
	void WriteVerboseLine( int iOffset, const char *pData, int iLen )
		{
		/* Here's what the line looks like:
	0000:  12 34 45 98 AB 34 45 23  23 45 A0 FF FE 23 23 12  .A.s.ewdfdefsa.a
	character postitions:
	|      |                     |  |                     |  |              |
	0123456789012345678901234567890123456789012345678901234567890123456789012
	          111111111122222222223333333333444444444455555555556666666666777
		*/
		enum { BUF_SIZE=128 };
		char szBuf[BUF_SIZE+1];
		unsigned char sV[16];
		memcpy( sV, pData, iLen );
		sprintf( szBuf, "%04X:  %02X %02X %02X %02X %02X %02X %02X %02X  ",
			iOffset, sV[0], sV[1], sV[2], sV[3], sV[4], sV[5], sV[6], sV[7] ); 
		sprintf( &(szBuf[32]), "%02X %02X %02X %02X %02X %02X %02X %02X  ",
			sV[8], sV[9], sV[10], sV[11], sV[12], sV[13], sV[14], sV[15] ); 
#		define C(x) ((isprint(sV[x]))?sV[x]:'.')
		sprintf( &(szBuf[57]), "%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c%c",
			C(0),C(1),C(2),C(3),C(4),C(5),C(6),C(7),
			C(8),C(9),C(10),C(11),C(12),C(13),C(14),C(15) );
#		undef C
		int iToBlank = 16 - iLen;
		if ( iToBlank )
			{
			/* --- blank out invalid values at end of list --- */
			memset( &(szBuf[55-(iToBlank*3)]), ' ', iToBlank*3 );
			memset( &(szBuf[73-iToBlank]), ' ', iToBlank );
			};
		Os() << szBuf << endl;
		};

	/* --- */