90f4187c98
Monotone-Parent: 5a7e429f43453ecb7e1ca7ac57a0e13f01a7d0be Monotone-Revision: bd604d08baed0cf7905c0c78a513a7e7a9621223 Monotone-Author: ludovic@Sophos.ca Monotone-Date: 2009-11-26T11:51:52 Monotone-Branch: ca.inverse.sogo
762 lines
18 KiB
Objective-C
762 lines
18 KiB
Objective-C
/* UIxMailPartHTMLViewer.m - this file is part of SOGo
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*
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* Copyright (C) 2007-2009 Inverse inc.
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*
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* Author: Wolfgang Sourdeau <wsourdeau@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/NSArray.h>
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#import <Foundation/NSDictionary.h>
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#import <Foundation/NSEnumerator.h>
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#import <Foundation/NSKeyValueCoding.h>
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#import <Foundation/NSValue.h>
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#import <SaxObjC/SaxAttributes.h>
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#import <SaxObjC/SaxContentHandler.h>
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#import <SaxObjC/SaxLexicalHandler.h>
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#import <SaxObjC/SaxXMLReader.h>
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#import <SaxObjC/SaxXMLReaderFactory.h>
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#import <NGExtensions/NSString+misc.h>
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#import <NGObjWeb/SoObjects.h>
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#include <libxml/encoding.h>
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#import <SoObjects/Mailer/SOGoMailObject.h>
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#import <SoObjects/Mailer/SOGoMailBodyPart.h>
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#import <NGMime/NGMimeType.h>
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#import "UIxMailPartHTMLViewer.h"
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#if 0
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#define showWhoWeAre() NSLog(@"invoked '%@'", NSStringFromSelector(_cmd))
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#else
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#define showWhoWeAre()
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#endif
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/* Tags that are forbidden within the body of the html content */
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static NSArray *BannedTags = nil;
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static xmlCharEncoding
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_xmlCharsetForCharset (NSString *charset)
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{
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struct { NSString *name; xmlCharEncoding encoding; } xmlEncodings[] = {
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{ @"us-ascii", XML_CHAR_ENCODING_ASCII},
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{ @"utf-8", XML_CHAR_ENCODING_UTF8},
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{ @"utf-16le", XML_CHAR_ENCODING_UTF16LE},
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{ @"utf-16be", XML_CHAR_ENCODING_UTF16BE},
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{ @"ucs-4le", XML_CHAR_ENCODING_UCS4LE},
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{ @"ucs-4be", XML_CHAR_ENCODING_UCS4BE},
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{ @"ebcdic", XML_CHAR_ENCODING_EBCDIC},
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// { @"iso-10646" , XML_CHAR_ENCODING_UCS4_2143},
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// { , XML_CHAR_ENCODING_UCS4_3412},
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// { @"ucs-2", XML_CHAR_ENCODING_UCS2},
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{ @"iso8859_1", XML_CHAR_ENCODING_8859_1},
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{ @"iso-8859-1", XML_CHAR_ENCODING_8859_1},
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{ @"iso-8859-2", XML_CHAR_ENCODING_8859_2},
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{ @"iso-8859-3", XML_CHAR_ENCODING_8859_3},
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{ @"iso-8859-4", XML_CHAR_ENCODING_8859_4},
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{ @"iso-8859-5", XML_CHAR_ENCODING_8859_5},
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{ @"iso-8859-6", XML_CHAR_ENCODING_8859_6},
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{ @"iso-8859-7", XML_CHAR_ENCODING_8859_7},
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{ @"iso-8859-8", XML_CHAR_ENCODING_8859_8},
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{ @"iso-8859-9", XML_CHAR_ENCODING_8859_9},
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{ @"iso-2022-jp", XML_CHAR_ENCODING_2022_JP},
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// { @"iso-2022-jp", XML_CHAR_ENCODING_SHIFT_JIS},
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{ @"koi8-r", XML_CHAR_ENCODING_ERROR}, // unsupported, will trigger koi8-r -> utf8 conversion
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{ @"windows-1250", XML_CHAR_ENCODING_ERROR}, // unsupported, will trigger windows-1250 -> utf8 conversion
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{ @"windows-1251", XML_CHAR_ENCODING_ERROR}, // unsupported, will trigger windows-1251 -> utf8 conversion
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{ @"euc-jp", XML_CHAR_ENCODING_EUC_JP}};
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unsigned count;
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xmlCharEncoding encoding;
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encoding = XML_CHAR_ENCODING_NONE;
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count = 0;
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while (encoding == XML_CHAR_ENCODING_NONE
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&& count < (sizeof (xmlEncodings) / sizeof (xmlEncodings[0])))
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if ([charset isEqualToString: xmlEncodings[count].name])
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encoding = xmlEncodings[count].encoding;
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else
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count++;
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if (encoding == XML_CHAR_ENCODING_NONE)
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encoding = XML_CHAR_ENCODING_8859_1;
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return encoding;
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}
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@interface _UIxHTMLMailContentHandler : NSObject <SaxContentHandler, SaxLexicalHandler>
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{
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NSMutableString *result;
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NSMutableString *css;
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NSDictionary *attachmentIds;
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BOOL ignoreContent;
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NSString *ignoreTag;
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BOOL inBody;
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BOOL inStyle;
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BOOL inCSSDeclaration;
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BOOL hasEmbeddedCSS;
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xmlCharEncoding contentEncoding;
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}
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- (NSString *) result;
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@end
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@implementation _UIxHTMLMailContentHandler
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+ (void) initialize
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{
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if (!BannedTags)
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{
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BannedTags = [NSArray arrayWithObjects: @"script", @"link", @"base",
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@"meta", @"title", nil];
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[BannedTags retain];
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}
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}
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- (id) init
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{
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if ((self = [super init]))
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{
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css = nil;
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result = nil;
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ignoreTag = nil;
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attachmentIds = nil;
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contentEncoding = XML_CHAR_ENCODING_UTF8;
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}
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return self;
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}
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- (void) dealloc
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{
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[result release];
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[css release];
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[ignoreTag release];
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[super dealloc];
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}
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- (void) setContentEncoding: (xmlCharEncoding) newContentEncoding
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{
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contentEncoding = newContentEncoding;
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}
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- (xmlCharEncoding) contentEncoding
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{
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return contentEncoding;
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}
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- (void) setAttachmentIds: (NSDictionary *) newAttachmentIds
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{
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attachmentIds = newAttachmentIds;
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}
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- (NSString *) css
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{
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return css;
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}
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- (NSString *) result
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{
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return result;
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}
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/* SaxContentHandler */
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- (void) startDocument
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{
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showWhoWeAre();
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[css release];
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[result release];
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result = [NSMutableString new];
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css = [NSMutableString new];
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ignoreContent = NO;
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[ignoreTag release];
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ignoreTag = nil;
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inBody = NO;
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inStyle = NO;
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inCSSDeclaration = NO;
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hasEmbeddedCSS = NO;
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}
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- (void) endDocument
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{
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showWhoWeAre();
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}
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- (void) startPrefixMapping: (NSString *)_prefix
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uri: (NSString *)_uri
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{
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showWhoWeAre();
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}
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- (void) endPrefixMapping: (NSString *)_prefix
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{
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showWhoWeAre();
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}
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- (void) _appendStyle: (unichar *) _chars
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length: (int) _len
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{
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unsigned int count, length;
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unichar *start, *currentChar;
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start = _chars;
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while (*start < 33)
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start++;
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currentChar = start;
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for (count = 0; count < _len; count++)
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{
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currentChar = _chars + count;
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if (inCSSDeclaration)
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{
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if (*currentChar == '}')
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{
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inCSSDeclaration = NO;
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hasEmbeddedCSS = NO;
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}
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}
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else
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{
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if (*currentChar < 32)
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{
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if (currentChar > start)
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[css appendString: [NSString stringWithCharacters: start
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length: (currentChar - start)]];
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start = currentChar + 1;
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}
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else
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{
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if (*currentChar == '{')
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inCSSDeclaration = YES;
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else if (*currentChar == ',')
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hasEmbeddedCSS = NO;
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else if (!hasEmbeddedCSS)
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{
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if (*currentChar == '@')
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hasEmbeddedCSS = YES;
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else
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if (*currentChar > 32)
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{
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length = (currentChar - start);
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[css appendFormat: @"%@\n.SOGoHTMLMail-CSS-Delimiter ",
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[NSString stringWithCharacters: start length: length]];
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hasEmbeddedCSS = YES;
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start = currentChar;
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}
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}
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}
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}
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}
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if (currentChar > start)
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[css appendString: [NSString stringWithCharacters: start
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length: (currentChar - start)]];
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}
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- (void) startElement: (NSString *) _localName
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namespace: (NSString *) _ns
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rawName: (NSString *) _rawName
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attributes: (id <SaxAttributes>) _attributes
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{
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unsigned int count, max;
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NSString *name, *value, *cid, *lowerName;
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NSMutableString *resultPart;
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BOOL skipAttribute;
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showWhoWeAre();
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lowerName = [_localName lowercaseString];
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if (inStyle || ignoreContent)
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;
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else if ([lowerName isEqualToString: @"base"])
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;
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else if ([lowerName isEqualToString: @"meta"])
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;
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else if ([lowerName isEqualToString: @"body"])
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inBody = YES;
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else if ([lowerName isEqualToString: @"style"])
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inStyle = YES;
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else if (inBody)
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{
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if ([BannedTags containsObject: lowerName])
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{
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ignoreTag = [lowerName copy];
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ignoreContent = YES;
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}
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else
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{
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resultPart = [NSMutableString string];
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[resultPart appendFormat: @"<%@", _rawName];
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max = [_attributes count];
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for (count = 0; count < max; count++)
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{
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skipAttribute = NO;
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name = [[_attributes nameAtIndex: count] lowercaseString];
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if ([name hasPrefix: @"ON"])
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skipAttribute = YES;
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else if ([name isEqualToString: @"src"])
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{
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value = [_attributes valueAtIndex: count];
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if ([value hasPrefix: @"cid:"])
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{
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cid = [NSString stringWithFormat: @"<%@>",
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[value substringFromIndex: 4]];
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value = [attachmentIds objectForKey: cid];
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skipAttribute = (value == nil);
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}
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else if ([lowerName isEqualToString: @"img"])
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{
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/* [resultPart appendString:
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@"src=\"/SOGo.woa/WebServerResources/empty.gif\""]; */
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name = @"unsafe-src";
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}
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else
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skipAttribute = YES;
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}
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else if ([name isEqualToString: @"href"]
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|| [name isEqualToString: @"action"])
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{
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value = [_attributes valueAtIndex: count];
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skipAttribute = ([value rangeOfString: @"://"].location
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== NSNotFound
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&& ![value hasPrefix: @"#"]);
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}
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else
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value = [_attributes valueAtIndex: count];
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if (!skipAttribute)
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[resultPart appendFormat: @" %@=\"%@\"",
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name, [value stringByReplacingString: @"\""
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withString: @"\\\""]];
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}
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[resultPart appendString: @">"];
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[result appendString: resultPart];
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}
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}
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}
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- (void) _finishCSS
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{
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NSRange excessiveDelimiter;
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[css replaceString: @"<!--" withString: @""];
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[css replaceString: @"-->" withString: @""];
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[css replaceString: @".SOGoHTMLMail-CSS-Delimiter body"
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withString: @".SOGoHTMLMail-CSS-Delimiter"];
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[css replaceString: @";" withString: @" !important;"];
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excessiveDelimiter = [css rangeOfString: @".SOGoHTMLMail-CSS-Delimiter "
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options: NSBackwardsSearch];
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if (excessiveDelimiter.location != NSNotFound)
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{
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if (NSMaxRange (excessiveDelimiter) == [css length])
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[css deleteCharactersInRange: excessiveDelimiter];
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}
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}
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- (void) endElement: (NSString *) _localName
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namespace: (NSString *) _ns
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rawName: (NSString *) _rawName
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{
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NSString *lowerName;
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showWhoWeAre();
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lowerName = [_localName lowercaseString];
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if (ignoreContent)
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{
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if ([lowerName isEqualToString: ignoreTag])
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{
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ignoreContent = NO;
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[ignoreTag release];
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ignoreTag = nil;
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}
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}
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else
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{
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if (inStyle)
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{
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if ([lowerName isEqualToString: @"style"])
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{
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inStyle = NO;
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inCSSDeclaration = NO;
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}
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}
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else if (inBody)
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{
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if ([lowerName isEqualToString: @"body"])
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{
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inBody = NO;
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if (css)
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[self _finishCSS];
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}
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else
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{
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//NSLog (@"%@", _localName);
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[result appendFormat: @"</%@>", _localName];
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}
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}
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}
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}
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- (void) characters: (unichar *) _chars
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length: (int) _len
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{
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showWhoWeAre();
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if (!ignoreContent)
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{
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if (inStyle)
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[self _appendStyle: _chars length: _len];
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else if (inBody)
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{
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NSString *tmpString;
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tmpString = [NSString stringWithCharacters: _chars length: _len];
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// HACK: This is to avoid appending the useless junk in the <html> tag
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// that Outlook adds. It seems to confuse the XML parser for
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// forwarded messages as we get this in the _body_ of the email
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// while we really aren't in it!
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if (![tmpString hasPrefix: @" xmlns:v=\"urn:schemas-microsoft-com:vml\""])
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[result appendString: [tmpString stringByEscapingHTMLString]];
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}
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}
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}
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- (void) ignorableWhitespace: (unichar *) _chars
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length: (int) _len
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{
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showWhoWeAre();
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}
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- (void) processingInstruction: (NSString *) _pi
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data: (NSString *) _data
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{
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showWhoWeAre();
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}
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- (void) setDocumentLocator: (id <NSObject, SaxLocator>) _locator
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{
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showWhoWeAre();
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}
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- (void) skippedEntity: (NSString *) _entityName
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{
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showWhoWeAre();
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}
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/* SaxLexicalHandler */
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- (void) comment: (unichar *) _chars
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length: (int) _len
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{
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showWhoWeAre();
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if (inStyle)
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[self _appendStyle: _chars length: _len];
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}
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- (void) startDTD: (NSString *) _name
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publicId: (NSString *) _pub
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systemId: (NSString *) _sys
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{
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showWhoWeAre();
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}
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- (void) endDTD
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{
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showWhoWeAre();
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}
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- (void) startEntity: (NSString *) _name
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{
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showWhoWeAre();
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}
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- (void) endEntity: (NSString *) _name
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{
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showWhoWeAre();
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}
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- (void) startCDATA
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{
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showWhoWeAre();
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}
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- (void) endCDATA
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{
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showWhoWeAre();
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}
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@end
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@interface NSDictionary (SOGoDebug)
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- (void) dump;
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@end
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@implementation NSDictionary (SOGoDebug)
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- (void) dump
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{
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NSEnumerator *keys;
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NSString *key;
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NSMutableString *dump;
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dump = [NSMutableString new];
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[dump appendFormat: @"\nNSDictionary dump (%@):\n", self];
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keys = [[self allKeys] objectEnumerator];
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key = [keys nextObject];
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while (key)
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{
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[dump appendFormat: @"%@: %@\n", key, [self objectForKey: key]];
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key = [keys nextObject];
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}
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[dump appendFormat: @"--- end ---\n"];
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NSLog(dump);
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[dump release];
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}
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@end
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@implementation UIxMailPartHTMLViewer
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- (id) init
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{
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if ((self = [super init]))
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{
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handler = nil;
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}
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return self;
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}
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- (void) dealloc
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{
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[handler release];
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[super dealloc];
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}
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- (xmlCharEncoding) _xmlCharEncoding
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{
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NSString *charset;
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charset = [[bodyInfo objectForKey:@"parameterList"]
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objectForKey: @"charset"];
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if (![charset length])
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charset = @"us-ascii";
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return _xmlCharsetForCharset([charset lowercaseString]);
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}
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- (void) _parseContent
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{
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NSObject <SaxXMLReader> *parser;
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NSData *preparsedContent;
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SOGoMailObject *mail;
|
|
xmlCharEncoding enc;
|
|
|
|
mail = [self clientObject];
|
|
|
|
preparsedContent = [super decodedFlatContent];
|
|
parser = [[SaxXMLReaderFactory standardXMLReaderFactory]
|
|
createXMLReaderForMimeType: @"text/html"];
|
|
|
|
handler = [_UIxHTMLMailContentHandler new];
|
|
[handler setAttachmentIds: [mail fetchAttachmentIds]];
|
|
|
|
// We check if we got an unsupported charset. If so
|
|
// we convert everything to UTF-16{LE,BE} so it passes
|
|
// in libxml2 and also in characters: length: defined
|
|
// in this file (that expects unichar:s)
|
|
enc = [self _xmlCharEncoding];
|
|
if (enc == XML_CHAR_ENCODING_ERROR)
|
|
{
|
|
NSString *s;
|
|
|
|
s = [[NSString alloc] initWithData: preparsedContent
|
|
encoding: [NGMimeType stringEncodingForCharset:
|
|
[[bodyInfo objectForKey:@"parameterList"]
|
|
objectForKey: @"charset"]]];
|
|
[s autorelease];
|
|
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
preparsedContent = [s dataUsingEncoding: NSUTF16BigEndianStringEncoding];
|
|
enc = XML_CHAR_ENCODING_UTF16BE;
|
|
#else
|
|
preparsedContent = [s dataUsingEncoding: NSUTF16LittleEndianStringEncoding];
|
|
enc = XML_CHAR_ENCODING_UTF16LE;
|
|
#endif
|
|
}
|
|
|
|
[handler setContentEncoding: enc];
|
|
|
|
[parser setContentHandler: handler];
|
|
[parser parseFromSource: preparsedContent];
|
|
}
|
|
|
|
- (NSString *) cssContent
|
|
{
|
|
NSString *cssContent, *css;
|
|
|
|
if (!handler)
|
|
[self _parseContent];
|
|
|
|
css = [handler css];
|
|
if ([css length])
|
|
cssContent
|
|
= [NSString stringWithFormat: @"<style type=\"text/css\">%@</style>",
|
|
[handler css]];
|
|
else
|
|
cssContent = @"";
|
|
|
|
return cssContent;
|
|
}
|
|
|
|
- (NSString *) flatContentAsString
|
|
{
|
|
if (!handler)
|
|
[self _parseContent];
|
|
|
|
return [handler result];
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation UIxMailPartExternalHTMLViewer
|
|
|
|
- (id) init
|
|
{
|
|
if ((self = [super init]))
|
|
{
|
|
handler = nil;
|
|
}
|
|
|
|
return self;
|
|
}
|
|
|
|
- (void) dealloc
|
|
{
|
|
[handler release];
|
|
[super dealloc];
|
|
}
|
|
|
|
- (xmlCharEncoding) _xmlCharEncoding
|
|
{
|
|
NSString *charset;
|
|
|
|
charset = [[bodyInfo objectForKey:@"parameterList"]
|
|
objectForKey: @"charset"];
|
|
if (![charset length])
|
|
charset = @"us-ascii";
|
|
|
|
return _xmlCharsetForCharset([charset lowercaseString]);
|
|
}
|
|
|
|
- (void) _parseContent
|
|
{
|
|
NSObject <SaxXMLReader> *parser;
|
|
NSData *preparsedContent;
|
|
SOGoMailObject *mail;
|
|
SOGoMailBodyPart *part;
|
|
NSString *encoding;
|
|
xmlCharEncoding enc;
|
|
|
|
part = [self clientObject];
|
|
mail = [part mailObject];
|
|
|
|
preparsedContent = [part fetchBLOB];
|
|
parser = [[SaxXMLReaderFactory standardXMLReaderFactory]
|
|
createXMLReaderForMimeType: @"text/html"];
|
|
encoding = [[part partInfo] valueForKey: @"encoding"];
|
|
if (![encoding length])
|
|
encoding = @"us-ascii";
|
|
|
|
handler = [_UIxHTMLMailContentHandler new];
|
|
[handler setAttachmentIds: [mail fetchAttachmentIds]];
|
|
|
|
// We check if we got an unsupported charset. If so
|
|
// we convert everything to UTF-16{LE,BE} so it passes
|
|
// in libxml2 and also in characters: length: defined
|
|
// in this file (that expects unichar:s)
|
|
enc = _xmlCharsetForCharset(encoding);
|
|
if (enc == XML_CHAR_ENCODING_ERROR)
|
|
{
|
|
NSString *s;
|
|
|
|
s = [[NSString alloc] initWithData: preparsedContent
|
|
encoding: [NGMimeType stringEncodingForCharset:
|
|
[[bodyInfo objectForKey:@"parameterList"]
|
|
objectForKey: @"charset"]]];
|
|
[s autorelease];
|
|
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
preparsedContent = [s dataUsingEncoding: NSUTF16BigEndianStringEncoding];
|
|
enc = XML_CHAR_ENCODING_UTF16BE;
|
|
#else
|
|
preparsedContent = [s dataUsingEncoding: NSUTF16LittleEndianStringEncoding];
|
|
enc = XML_CHAR_ENCODING_UTF16LE;
|
|
#endif
|
|
}
|
|
|
|
[handler setContentEncoding: enc];
|
|
[parser setContentHandler: handler];
|
|
[parser parseFromSource: preparsedContent];
|
|
}
|
|
|
|
- (NSString *) filename
|
|
{
|
|
return [[self clientObject] filename];
|
|
}
|
|
|
|
- (NSString *) cssContent
|
|
{
|
|
NSString *cssContent, *css;
|
|
|
|
if (!handler)
|
|
[self _parseContent];
|
|
|
|
css = [handler css];
|
|
if ([css length])
|
|
cssContent
|
|
= [NSString stringWithFormat: @"<style type=\"text/css\">%@</style>",
|
|
[handler css]];
|
|
else
|
|
cssContent = @"";
|
|
|
|
return cssContent;
|
|
}
|
|
|
|
- (NSString *) flatContentAsString
|
|
{
|
|
if (!handler)
|
|
[self _parseContent];
|
|
|
|
return [handler result];
|
|
}
|
|
|
|
@end
|