mimechk.cpp

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
 * 
 * Contributor(s): 
 *  
 * ***** END LICENSE BLOCK ***** */ 

/****************************************************************************
 *  Defines
 */
#define ENCRYPTED_MIME_EXTENSION	"-encrypted"
#define ENCRYPTED_MIME_EXTENSION_SIZE	(sizeof(ENCRYPTED_MIME_EXTENSION) - 1)


/****************************************************************************
 *  Includes
 */
// #include "hlxclib/stdio.h"
#include "hlxclib/string.h"

#include "hxtypes.h"
#include "hxstrutl.h"
#include "mimechk.h"


BOOL isProhibitedMimeType(const char* pMimeType, ULONG32 ulMimeLen)
{
    BOOL bProhibited = TRUE;

    // First disqualify based solely on length
    if ((ulMimeLen != 20) && (ulMimeLen != 29) && (ulMimeLen != 26) &&
	(ulMimeLen != 25) && (ulMimeLen != 23) && (ulMimeLen != 21) &&
	(ulMimeLen != 24))
    {
	return TRUE;
    }

    // Now walk the input string backwards and find out if it matches
    // any of the following acceptable mime types:
    //
    // "audio/x-pn-realaudio"		"oidualaer-np-x/oidua"
    // "application/x-shockwave-flash"	"hsalf-evawkcohs-x/noitacilppa"
    // "application/x-pn-realmedia"	"aidemlaer-np-x/noitacilppa"
    // "application/x-pn-realevent"	"tnevelaer-np-x/noitacilppa"
    // "application/x-pn-imagemap"	"pamegami-np-x/noitacilppa"
    // "application/x-pn-realad"	"dalaer-np-x/noitacilppa"
    // "syncMM/x-pn-realvideo"		"oedivlaer-np-x/MMcnys"
    // "image_map/x-pn-realvideo"	"oedivlaer-np-x/pam_egami"
    // "video/x-pn-realvideo"
    if (pMimeType[ulMimeLen - 1] == 'o')
    {
	if (pMimeType[ulMimeLen - 2] == 'e')
	{
	    if (pMimeType[0] == 's')
	    {
		// "syncMM/x-pn-realvideo"
		if (strcmp(pMimeType, "syncMM/x-pn-realvideo") == 0)
		{
		    bProhibited = FALSE;
		}
	    }
	    else if (pMimeType[0] == 'i')
	    {
		// "image_map/x-pn-realvideo"
		if (strcmp(pMimeType, "image_map/x-pn-realvideo") == 0)
		{
		    bProhibited = FALSE;
		}
	    }
	    else if (pMimeType[0] == 'v')
	    {
		// "video/x-pn-realvideo"
		if (strcmp(pMimeType, "video/x-pn-realvideo") == 0)
		{
		    bProhibited = FALSE;
		}
	    }
	}
	else if (pMimeType[ulMimeLen - 2] == 'i')
	{
	    // "audio/x-pn-realaudio"
	    if (strcmp(pMimeType, "audio/x-pn-realaudio") == 0)
	    {
		bProhibited = FALSE;
	    }
	}
    }
    else if (pMimeType[ulMimeLen - 1] == 'h')
    {
	// "application/x-shockwave-flash"
	if (strcmp(pMimeType, "application/x-shockwave-flash") == 0)
	{
	    bProhibited = FALSE;
	}
    }
    else if (pMimeType[ulMimeLen - 1] == 'a')
    {
	// "application/x-pn-realmedia"
	if (strcmp(pMimeType, "application/x-pn-realmedia") == 0)
	{
	    bProhibited = FALSE;
	}
    }
    else if (pMimeType[ulMimeLen - 1] == 't')
    {
	// "application/x-pn-realevent"
	if (strcmp(pMimeType, "application/x-pn-realevent") == 0)
	{
	    bProhibited = FALSE;
	}
    }
    else if (pMimeType[ulMimeLen - 1] == 'p')
    {
	// "application/x-pn-imagemap"
	if (strcmp(pMimeType, "application/x-pn-imagemap") == 0)
	{
	    bProhibited = FALSE;
	}
    }
    else if (pMimeType[ulMimeLen - 1] == 'd')
    {
	// "application/x-pn-realad"
	if (strcmp(pMimeType, "application/x-pn-realad") == 0)
	{
	    bProhibited = FALSE;
	}
    }

    return bProhibited;
}


int hxMimeRootCmp(const char* pMimeType1, const char* pMimeType2)
{
    int retVal;

    retVal = strcasecmp(pMimeType1, pMimeType2);

    if (retVal != 0)
    {
	ULONG32 ulLength1 = strlen(pMimeType1);
	ULONG32 ulLength2 = strlen(pMimeType2);

	if (ulLength1 == (ulLength2 + ENCRYPTED_MIME_EXTENSION_SIZE))
	{
	    if ((strcasecmp(pMimeType1 + ulLength1 - ENCRYPTED_MIME_EXTENSION_SIZE,
			    ENCRYPTED_MIME_EXTENSION) == 0) &&
		(strncasecmp(pMimeType1, pMimeType2, ulLength2) == 0))
	    {
		retVal = 0;
	    }
	}
	else if (ulLength2 == (ulLength1 + ENCRYPTED_MIME_EXTENSION_SIZE))
	{
	    if ((strcasecmp(pMimeType2 + ulLength2 - ENCRYPTED_MIME_EXTENSION_SIZE,
			    ENCRYPTED_MIME_EXTENSION) == 0) &&
		(strncasecmp(pMimeType1, pMimeType2, ulLength1) == 0))
	    {
		retVal = 0;
	    }
	}
    }

    return retVal;
}


BOOL decryptMimeType(CHXString &strMimeType)
{
    BOOL bRetVal = FALSE;	// assume no decryption
    ULONG32 ulMimeLength = strMimeType.GetLength();
	
    if (ulMimeLength > ENCRYPTED_MIME_EXTENSION_SIZE)
    {
	const char* pMimeChars = (const char*) (strMimeType);
	
	if (strcmp(ENCRYPTED_MIME_EXTENSION, 
	    &pMimeChars[ulMimeLength - ENCRYPTED_MIME_EXTENSION_SIZE]) == 0)
	{
	    ulMimeLength -= ENCRYPTED_MIME_EXTENSION_SIZE;
	    strMimeType.GetBufferSetLength(ulMimeLength);
	    bRetVal = TRUE;	// decrypted
	}
    }
    
    return bRetVal;
}


BOOL encryptMimeType(CHXString &strMimeType)
{
    BOOL bRetVal = FALSE;	// assume no encryption
    ULONG32 ulMimeLength = strMimeType.GetLength();
    const char* pMimeChars = (const char*) (strMimeType);

    if ((ulMimeLength < ENCRYPTED_MIME_EXTENSION_SIZE) ||
	(strcmp(ENCRYPTED_MIME_EXTENSION, 
		&pMimeChars[ulMimeLength - ENCRYPTED_MIME_EXTENSION_SIZE]) != 0))
    {
	strMimeType += ENCRYPTED_MIME_EXTENSION;
	bRetVal = TRUE;
    }

    return bRetVal;
}