dirtype.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.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:

 1. Redistributions of source code must retain the above copyright
    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.

 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 IN NO EVENT SHALL THE AUTHORS OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 OF THE POSSIBILITY OF SUCH DAMAGE.

 *____________________________________________________________________________*|
 *
 * $Source: /cvsroot/pi3web/Pi3Web_200/Source/HTTP/DirType.cpp,v $
 * $Date: 2003/05/13 18:42:02 $
 *
 Description:
	Set the MIME type only if this is a directory.

\*____________________________________________________________________________*/
//$SourceTop:$

#include "HandBase.h"
#include "HTTPCore.h"
#include "PIStrStr.h"

/*____________________________________________________________________________*\
 *
 Description:
\*____________________________________________________________________________*/
#define KEY_CONF_SETTYPE		"SetType"

#if 0
	/*
	** HTML documentation for this handler
	*/
/*___+++HTMLDOC_BEGIN+++___*/
Name:
	CheckForDirectory

Description:
	Check if the resources identified by the physical path is a directory. If
	the resource is a directory then set the Content-Type of the resource to
	the type identified by the 'SetType' parameter.

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

<TR>
<TD>SetType
<TD>+
<TD>A MIME type/subtype pair 
<TD>Internal directory MIME type
<TD>SetType="internal/x-directory"

</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>
	SetType
</H5>
The internal MIME type used to identify directory resources. Typically
this will be "internal/x-directory". 

Phase:
	CHECKTYPE

Returns:
	PIAPI_COMPLETED if the resource was a directory and the Content-Type 
	was set to the type specified by the 'SetType' parameter.

Example:
	<PRE>
	&lt;Object&gt;
		Name CheckForDirectory
		Class CheckForDirectoryClass
	&lt;/Object&gt;

	&lt;Object&gt;
		...
		CheckType CheckForDirectory SetType="internal/x-directory"
		...
	&lt;/Object&gt;

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

/*____________________________________________________________________________*\
 *
 Class:
 Description:
\*____________________________________________________________________________*/
class CheckForDirectory : public HandlerBaseHTTP
{
private:
	/* ---
	Configuration data
	--- */
	PIString sSetType;

protected:
	int Parameter( const char *pVariable, const char *pValue,
		const char *pWhere )
		{
		assert( pVariable && pValue );
		PIOStrStream os;
		os << pWhere << "CheckForDirectory: ";
		if ( !PIUtil_stricmp( KEY_CONF_SETTYPE, pVariable ) )
			{
			sSetType = pValue;
			}
		else
			{
			os << "Undefined parameter '" << pVariable << "'" << ends;
			CONFIG_ERR( Object(), os.str() );
			};

		return 1;
		};

public:
	CheckForDirectory( PIObject *pObject, int iArgc, const char *ppArgv[] )
	:	HandlerBaseHTTP( pObject )
		{
		ReadParameters( iArgc, ppArgv );

		/* ---
		Check that the type was given 
		--- */
		if ( sSetType==PIString::Empty() )
			{
			CONFIG_ERR( pObject, "CheckForDirectory: 'SetType' not \
defined" );
			SetOK( 0 );
			return;
			};
		};

	int Handle( int iPhase, PIHTTP &tPIHTTP, PIIOBuffer &/* tBuffer */ )
		{
		if ( iPhase!=PH_CHECKTYPE ) { return PIAPI_ERROR; };

		PIDB *pR = tPIHTTP.pResponseDB;

		const char *pPath = (const char *)PIDB_lookup( pR,
			PIDBTYPE_STRING, KEY_INT_PATH, 0 );
		PIFInfo *pFInfo = HTTPCore_getCachedFile( pPath );

		/* ---
		If this is not a directory return CONTINUE, otherwise set
		the mime type as given 
		--- */
		int iDirectory = PIFInfo_isDirectory( pFInfo );
		HTTPCore_releaseCachedFile( pFInfo );
		if ( !iDirectory )
			{ return PIAPI_CONTINUE; }
		else
			{
			PIDB_add( pR, PIDBTYPE_RFC822, KEY_HTTP_CONTENTTYPE, 
				(void *)(const char *)sSetType, 0 );
			};
		return PIAPI_COMPLETED;
		};
};

/*____________________________________________________________________________*\
 *
 Function:
 Synopsis:
 Description:
\*____________________________________________________________________________*/
PUBLIC_PIAPI int CheckForDirectory_constructor( PIObject *pObj,
	int iArgc, const char *ppArgv[] )
{
	return HandlerBaseHTTP_constructor( pObj, PI_NEW( CheckForDirectory( pObj,
		iArgc, ppArgv ) ) );
}

#if 0
/*___+++CNF_BEGIN+++___*/
	<Class>
		Name CheckForDirectoryClass
		Type LogicExtension
		Library HTTP
		OnClassLoad HandlerBaseHTTP_onClassLoad
		Constructor CheckForDirectory_constructor
		CopyConstructor HandlerBaseHTTP_copyConstructor
		Destructor HandlerBaseHTTP_destructor
		Execute HandlerBaseHTTP_execute
	</Class>

	<Object>
		Name CheckForDirectory
		Class CheckForDirectoryClass
	</Object>

/*___+++CNF_END+++___*/
#endif