127 lines
3.2 KiB
Objective-C
127 lines
3.2 KiB
Objective-C
/* NSData+Mail.m - this file is part of SOGo
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*
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* Copyright (C) 2007-2008 Inverse inc.
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*
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* Author: Wolfgang Sourdeau <wsourdeau@inverse.ca>
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* Ludovic Marcotte <lmarcotte@inverse.ca>
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#import <Foundation/NSString.h>
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#import <NGExtensions/NGBase64Coding.h>
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#import <NGExtensions/NGQuotedPrintableCoding.h>
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#import <NGExtensions/NSString+Encoding.h>
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#import "NSData+Mail.h"
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@implementation NSData (SOGoMailUtilities)
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- (NSData *) bodyDataFromEncoding: (NSString *) encoding
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{
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NSString *realEncoding;
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NSData *decodedData;
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realEncoding = [encoding lowercaseString];
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if ([realEncoding isEqualToString: @"7bit"]
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|| [realEncoding isEqualToString: @"8bit"])
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decodedData = self;
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else if ([realEncoding isEqualToString: @"base64"])
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decodedData = [self dataByDecodingBase64];
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else if ([realEncoding isEqualToString: @"quoted-printable"])
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decodedData = [self dataByDecodingQuotedPrintableTransferEncoding];
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else
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{
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decodedData = nil;
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NSLog (@"encoding '%@' unknown, returning nil data", realEncoding);
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}
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return decodedData;
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}
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- (NSString *) decodedSubject
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{
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const char *cData, *endFlag;
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unsigned int len;
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NSString *decodedSubject;
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cData = [self bytes];
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len = [self length];
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if (len)
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{
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decodedSubject = nil;
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if (len > 6)
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{
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endFlag = cData + len - 2;
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if (*cData == '=' && *(cData + 1) == '?'
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&& *endFlag == '?' && *(endFlag + 1) == '=')
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{
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NSString *enc;
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int i;
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cData += 2;
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i = 2;
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while (*cData != '?' && i < len)
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{
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cData++;
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i++;
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}
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enc = [[[NSString alloc] initWithData:[self subdataWithRange: NSMakeRange(2, i-2)]
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encoding: NSASCIIStringEncoding] autorelease];
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if (i+3 < len)
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{
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NSData *d;
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d = [self subdataWithRange: NSMakeRange(i+3, len-i-5)];
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// We check if we have a QP or Base64 encoding
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if (*(cData+1) == 'q' || *(cData+1) == 'Q')
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d = [d dataByDecodingQuotedPrintable];
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else
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d = [d dataByDecodingBase64];
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decodedSubject = [NSString stringWithData: d usingEncodingNamed: enc];
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}
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else
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decodedSubject = nil;
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}
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}
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if (!decodedSubject)
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{
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decodedSubject
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= [[NSString alloc] initWithData: self
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encoding: NSUTF8StringEncoding];
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if (!decodedSubject)
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decodedSubject
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= [[NSString alloc] initWithData: self
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encoding: NSISOLatin1StringEncoding];
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[decodedSubject autorelease];
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}
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}
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else
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decodedSubject = @"";
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return decodedSubject;
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}
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@end
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