зеркало из https://github.com/mozilla/pjs.git
764 строки
24 KiB
C++
764 строки
24 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:expandtab:shiftwidth=2:tabstop=4:
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*/
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* rhp@netscape.com
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* Jungshik Shin <jshin@mailaps.org>
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* John G Myers <jgmyers@netscape.com>
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* Takayuki Tei <taka@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <string.h>
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#include "prtypes.h"
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#include "prmem.h"
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#include "prprf.h"
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#include "plstr.h"
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#include "plbase64.h"
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#include "nsCRT.h"
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#include "nsMemory.h"
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#include "nsCOMPtr.h"
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#include "nsEscape.h"
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#include "nsIUTF8ConverterService.h"
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#include "nsUConvCID.h"
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#include "nsIServiceManager.h"
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#include "nsMIMEHeaderParamImpl.h"
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#include "nsReadableUtils.h"
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#include "nsNativeCharsetUtils.h"
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// static functions declared below are moved from mailnews/mime/src/comi18n.cpp
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static char *DecodeQ(const char *, PRUint32);
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static PRBool Is7bitNonAsciiString(const char *, PRUint32);
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static void CopyRawHeader(const char *, PRUint32, const char *, nsACString &);
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static nsresult DecodeRFC2047Str(const char *, const char *, PRBool, nsACString&);
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// XXX The chance of UTF-7 being used in the message header is really
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// low, but in theory it's possible.
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#define IS_7BIT_NON_ASCII_CHARSET(cset) \
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(!nsCRT::strncasecmp((cset), "ISO-2022", 8) || \
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!nsCRT::strncasecmp((cset), "HZ-GB", 5) || \
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!nsCRT::strncasecmp((cset), "UTF-7", 5))
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NS_IMPL_ISUPPORTS1(nsMIMEHeaderParamImpl, nsIMIMEHeaderParam)
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// XXX : aTryLocaleCharset is not yet effective.
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NS_IMETHODIMP
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nsMIMEHeaderParamImpl::GetParameter(const nsACString& aHeaderVal,
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const char *aParamName,
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const nsACString& aFallbackCharset,
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PRBool aTryLocaleCharset,
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char **aLang, nsAString& aResult)
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{
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aResult.Truncate();
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nsresult rv;
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// get parameter (decode RFC 2231 if it's RFC 2231-encoded and
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// return charset.)
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nsXPIDLCString med;
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nsXPIDLCString charset;
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rv = GetParameterInternal(PromiseFlatCString(aHeaderVal).get(), aParamName,
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getter_Copies(charset), aLang, getter_Copies(med));
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if (NS_FAILED(rv))
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return rv;
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// convert to UTF-8 after charset conversion and RFC 2047 decoding
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// if necessary.
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nsCAutoString str1;
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rv = DecodeParameter(med, charset.get(), nsnull, PR_FALSE, str1);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!aFallbackCharset.IsEmpty())
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{
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nsCAutoString str2;
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nsCOMPtr<nsIUTF8ConverterService>
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cvtUTF8(do_GetService(NS_UTF8CONVERTERSERVICE_CONTRACTID));
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if (cvtUTF8 &&
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NS_SUCCEEDED(cvtUTF8->ConvertStringToUTF8(str1,
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PromiseFlatCString(aFallbackCharset).get(), PR_FALSE, str2))) {
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CopyUTF8toUTF16(str2, aResult);
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return NS_OK;
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}
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}
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if (IsUTF8(str1)) {
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CopyUTF8toUTF16(str1, aResult);
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return NS_OK;
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}
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if (aTryLocaleCharset && !NS_IsNativeUTF8())
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return NS_CopyNativeToUnicode(str1, aResult);
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CopyASCIItoUTF16(str1, aResult);
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return NS_OK;
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}
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// moved almost verbatim from mimehdrs.cpp
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// char *
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// MimeHeaders_get_parameter (const char *header_value, const char *parm_name,
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// char **charset, char **language)
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//
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// The format of these header lines is
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// <token> [ ';' <token> '=' <token-or-quoted-string> ]*
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NS_IMETHODIMP
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nsMIMEHeaderParamImpl::GetParameterInternal(const char *aHeaderValue,
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const char *aParamName,
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char **aCharset,
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char **aLang,
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char **aResult)
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{
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if (!aHeaderValue || !*aHeaderValue || !aResult)
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return NS_ERROR_INVALID_ARG;
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*aResult = nsnull;
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if (aCharset) *aCharset = nsnull;
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if (aLang) *aLang = nsnull;
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const char *str = aHeaderValue;
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// skip leading white space.
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for (; *str && nsCRT::IsAsciiSpace(*str); ++str)
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;
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const char *start = str;
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// aParamName is empty. return the first (possibly) _unnamed_ 'parameter'
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// For instance, return 'inline' in the following case:
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// Content-Disposition: inline; filename=.....
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if (!aParamName || !*aParamName)
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{
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for (; *str && *str != ';' && !nsCRT::IsAsciiSpace(*str); ++str)
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;
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if (str == start)
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return NS_ERROR_UNEXPECTED;
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*aResult = (char *) nsMemory::Clone(start, (str - start) + 1);
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(*aResult)[str - start] = '\0'; // null-terminate
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NS_ENSURE_TRUE(*aResult, NS_ERROR_OUT_OF_MEMORY);
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return NS_OK;
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}
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/* Skip forward to first ';' */
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for (; *str && *str != ';' && *str != ','; ++str)
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;
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if (*str)
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str++;
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/* Skip over following whitespace */
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for (; *str && nsCRT::IsAsciiSpace(*str); ++str)
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;
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// Some broken http servers just specify parameters
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// like 'filename' without specifying disposition
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// method. Rewind to the first non-white-space
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// character.
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if (!*str)
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str = start;
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// RFC2231 - The legitimate parm format can be:
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// A. title=ThisIsTitle
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// B. title*=us-ascii'en-us'This%20is%20wierd.
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// C. title*0*=us-ascii'en'This%20is%20wierd.%20We
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// title*1*=have%20to%20support%20this.
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// title*2="Else..."
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// D. title*0="Hey, what you think you are doing?"
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// title*1="There is no charset and lang info."
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PRInt32 paramLen = strlen(aParamName);
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while (*str) {
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const char *tokenStart = str;
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const char *tokenEnd = 0;
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const char *valueStart = str;
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const char *valueEnd = 0;
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NS_ASSERTION(!nsCRT::IsAsciiSpace(*str), "should be after whitespace.");
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// Skip forward to the end of this token.
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for (; *str && !nsCRT::IsAsciiSpace(*str) && *str != '=' && *str != ';'; str++)
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;
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tokenEnd = str;
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// Skip over whitespace, '=', and whitespace
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while (nsCRT::IsAsciiSpace(*str)) ++str;
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if (*str == '=') ++str;
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while (nsCRT::IsAsciiSpace(*str)) ++str;
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if (*str != '"')
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{
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// The value is a token, not a quoted string.
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valueStart = str;
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for (valueEnd = str;
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*valueEnd && !nsCRT::IsAsciiSpace (*valueEnd) && *valueEnd != ';';
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valueEnd++)
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;
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str = valueEnd;
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}
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else
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{
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// The value is a quoted string.
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++str;
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valueStart = str;
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for (valueEnd = str; *valueEnd; ++valueEnd)
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{
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if (*valueEnd == '\\')
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++valueEnd;
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else if (*valueEnd == '"')
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break;
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}
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str = valueEnd + 1;
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}
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// See if this is the simplest case (case A above),
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// a 'single' line value with no charset and lang.
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// If so, copy it and return.
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if (tokenEnd - tokenStart == paramLen &&
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!nsCRT::strncasecmp(tokenStart, aParamName, paramLen))
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{
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// if the parameter spans across multiple lines we have to strip out the
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// line continuation -- jht 4/29/98
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nsCAutoString tempStr(valueStart, valueEnd - valueStart);
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tempStr.StripChars("\r\n");
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*aResult = ToNewCString(tempStr);
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NS_ENSURE_TRUE(*aResult, NS_ERROR_OUT_OF_MEMORY);
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return NS_OK;
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}
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// case B, C, and D
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else if (tokenEnd - tokenStart > paramLen &&
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!nsCRT::strncasecmp(tokenStart, aParamName, paramLen) &&
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*(tokenStart + paramLen) == '*')
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{
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const char *cp = tokenStart + paramLen + 1; // 1st char pass '*'
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PRBool needUnescape = *(tokenEnd - 1) == '*';
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// the 1st line of a multi-line parameter or a single line that needs
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// unescaping. ( title*0*= or title*= )
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if ((*cp == '0' && needUnescape) || (tokenEnd - tokenStart == paramLen + 1))
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{
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// look for single quotation mark(')
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const char *sQuote1 = PL_strchr(valueStart, 0x27);
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const char *sQuote2 = (char *) (sQuote1 ? PL_strchr(sQuote1 + 1, 0x27) : nsnull);
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// Two single quotation marks must be present even in
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// absence of charset and lang.
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if (!sQuote1 || !sQuote2)
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NS_WARNING("Mandatory two single quotes are missing in header parameter\n");
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if (aCharset && sQuote1 > valueStart && sQuote1 < valueEnd)
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{
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*aCharset = (char *) nsMemory::Clone(valueStart, sQuote1 - valueStart + 1);
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if (*aCharset)
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*(*aCharset + (sQuote1 - valueStart)) = 0;
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}
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if (aLang && sQuote1 && sQuote2 && sQuote2 > sQuote1 + 1 &&
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sQuote2 < valueEnd)
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{
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*aLang = (char *) nsMemory::Clone(sQuote1 + 1, sQuote2 - (sQuote1 + 1) + 1);
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if (*aLang)
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*(*aLang + (sQuote2 - (sQuote1 + 1))) = 0;
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}
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// Be generous and handle gracefully when required
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// single quotes are absent.
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if (sQuote1)
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{
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if(!sQuote2)
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sQuote2 = sQuote1;
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}
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else
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sQuote2 = valueStart - 1;
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if (sQuote2 && sQuote2 + 1 < valueEnd)
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{
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NS_ASSERTION(!*aResult, "This is the 1st line. result buffer should be null.");
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*aResult = (char *) nsMemory::Alloc(valueEnd - (sQuote2 + 1) + 1);
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if (*aResult)
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{
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memcpy(*aResult, sQuote2 + 1, valueEnd - (sQuote2 + 1));
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*(*aResult + (valueEnd - (sQuote2 + 1))) = 0;
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if (needUnescape)
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{
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nsUnescape(*aResult);
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if (tokenEnd - tokenStart == paramLen + 1)
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// we're done; this is case B
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return NS_OK;
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}
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}
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}
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} // end of if-block : title*0*= or title*=
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// a line of multiline param with no need for unescaping : title*[0-9]=
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// or 2nd or later lines of a multiline param : title*[1-9]*=
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else if (nsCRT::IsAsciiDigit(PRUnichar(*cp)))
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{
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PRInt32 len = 0;
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if (*aResult) // 2nd or later lines of multiline parameter
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{
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len = strlen(*aResult);
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char *ns = (char *) nsMemory::Realloc(*aResult, len + (valueEnd - valueStart) + 1);
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if (!ns)
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{
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nsMemory::Free(*aResult);
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}
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*aResult = ns;
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}
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else if (*cp == '0') // must be; 1st line : title*0=
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{
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*aResult = (char *) nsMemory::Alloc(valueEnd - valueStart + 1);
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}
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// else {} something is really wrong; out of memory
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if (*aResult)
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{
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// append a partial value
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memcpy(*aResult + len, valueStart, valueEnd - valueStart);
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*(*aResult + len + (valueEnd - valueStart)) = 0;
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if (needUnescape)
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nsUnescape(*aResult + len);
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}
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else
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return NS_ERROR_OUT_OF_MEMORY;
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} // end of if-block : title*[0-9]= or title*[1-9]*=
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}
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// str now points after the end of the value.
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// skip over whitespace, ';', whitespace.
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while (nsCRT::IsAsciiSpace(*str)) ++str;
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if (*str == ';') ++str;
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while (nsCRT::IsAsciiSpace(*str)) ++str;
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}
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if (*aResult)
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return NS_OK;
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else
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return NS_ERROR_INVALID_ARG; // aParameter not found !!
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}
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NS_IMETHODIMP
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nsMIMEHeaderParamImpl::DecodeRFC2047Header(const char* aHeaderVal,
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const char* aDefaultCharset,
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PRBool aOverrideCharset,
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PRBool aEatContinuations,
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nsACString& aResult)
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{
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aResult.Truncate();
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if (!aHeaderVal)
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return NS_ERROR_INVALID_ARG;
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if (!*aHeaderVal)
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return NS_OK;
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// If aHeaderVal is RFC 2047 encoded or is not a UTF-8 string but
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// aDefaultCharset is specified, decodes RFC 2047 encoding and converts
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// to UTF-8. Otherwise, just strips away CRLF.
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if (PL_strstr(aHeaderVal, "=?") ||
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aDefaultCharset && (!IsUTF8(nsDependentCString(aHeaderVal)) ||
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Is7bitNonAsciiString(aHeaderVal, PL_strlen(aHeaderVal)))) {
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DecodeRFC2047Str(aHeaderVal, aDefaultCharset, aOverrideCharset, aResult);
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} else if (aEatContinuations &&
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(PL_strchr(aHeaderVal, '\n') || PL_strchr(aHeaderVal, '\r'))) {
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aResult = aHeaderVal;
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} else {
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aEatContinuations = PR_FALSE;
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aResult = aHeaderVal;
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}
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if (aEatContinuations) {
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nsCAutoString temp(aResult);
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temp.ReplaceSubstring("\n\t", " ");
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temp.ReplaceSubstring("\r\t", " ");
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temp.StripChars("\r\n");
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aResult = temp;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsMIMEHeaderParamImpl::DecodeParameter(const nsACString& aParamValue,
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const char* aCharset,
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const char* aDefaultCharset,
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PRBool aOverrideCharset,
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nsACString& aResult)
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{
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aResult.Truncate();
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// If aCharset is given, aParamValue was obtained from RFC2231
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// encoding and we're pretty sure that it's in aCharset.
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if (aCharset && *aCharset)
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{
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nsCOMPtr<nsIUTF8ConverterService> cvtUTF8(do_GetService(NS_UTF8CONVERTERSERVICE_CONTRACTID));
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if (cvtUTF8)
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// skip ASCIIness/UTF8ness test if aCharset is 7bit non-ascii charset.
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return cvtUTF8->ConvertStringToUTF8(aParamValue, aCharset,
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IS_7BIT_NON_ASCII_CHARSET(aCharset), aResult);
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}
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const nsAFlatCString& param = PromiseFlatCString(aParamValue);
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nsCAutoString unQuoted;
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nsACString::const_iterator s, e;
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param.BeginReading(s);
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param.EndReading(e);
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// strip '\' when used to quote CR, LF, '"' and '\'
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for ( ; s != e; ++s) {
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if ((*s == '\\')) {
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if (++s == e) {
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--s; // '\' is at the end. move back and append '\'.
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}
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else if (*s != nsCRT::CR && *s != nsCRT::LF && *s != '"' && *s != '\\') {
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--s; // '\' is not foll. by CR,LF,'"','\'. move back and append '\'
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}
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// else : skip '\' and append the quoted character.
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}
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unQuoted.Append(*s);
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}
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aResult = unQuoted;
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nsCAutoString decoded;
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// Try RFC 2047 encoding, instead.
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nsresult rv = DecodeRFC2047Header(unQuoted.get(), aDefaultCharset,
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aOverrideCharset, PR_TRUE, decoded);
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if (NS_SUCCEEDED(rv) && !decoded.IsEmpty())
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aResult = decoded;
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return rv;
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}
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#define ISHEXCHAR(c) \
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(0x30 <= PRUint8(c) && PRUint8(c) <= 0x39 || \
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0x41 <= PRUint8(c) && PRUint8(c) <= 0x46 || \
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0x61 <= PRUint8(c) && PRUint8(c) <= 0x66)
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// Decode Q encoding (RFC 2047).
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// static
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char *DecodeQ(const char *in, PRUint32 length)
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{
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char *out, *dest = 0;
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out = dest = (char *)PR_Calloc(length + 1, sizeof(char));
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if (dest == nsnull)
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return nsnull;
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while (length > 0) {
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PRUintn c = 0;
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switch (*in) {
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case '=':
|
|
// check if |in| in the form of '=hh' where h is [0-9a-fA-F].
|
|
if (length < 3 || !ISHEXCHAR(in[1]) || !ISHEXCHAR(in[2]))
|
|
goto badsyntax;
|
|
PR_sscanf(in + 1, "%2X", &c);
|
|
*out++ = (char) c;
|
|
in += 3;
|
|
length -= 3;
|
|
break;
|
|
|
|
case '_':
|
|
*out++ = ' ';
|
|
in++;
|
|
length--;
|
|
break;
|
|
|
|
default:
|
|
if (*in & 0x80) goto badsyntax;
|
|
*out++ = *in++;
|
|
length--;
|
|
}
|
|
}
|
|
*out++ = '\0';
|
|
|
|
for (out = dest; *out ; ++out) {
|
|
if (*out == '\t')
|
|
*out = ' ';
|
|
}
|
|
|
|
return dest;
|
|
|
|
badsyntax:
|
|
PR_Free(dest);
|
|
return nsnull;
|
|
}
|
|
|
|
// check if input is HZ (a 7bit encoding for simplified Chinese : RFC 1842))
|
|
// or has ESC which may be an indication that it's in one of many ISO
|
|
// 2022 7bit encodings (e.g. ISO-2022-JP(-2)/CN : see RFC 1468, 1922, 1554).
|
|
// static
|
|
PRBool Is7bitNonAsciiString(const char *input, PRUint32 len)
|
|
{
|
|
PRInt32 c;
|
|
|
|
enum { hz_initial, // No HZ seen yet
|
|
hz_escaped, // Inside an HZ ~{ escape sequence
|
|
hz_seen, // Have seen at least one complete HZ sequence
|
|
hz_notpresent // Have seen something that is not legal HZ
|
|
} hz_state;
|
|
|
|
hz_state = hz_initial;
|
|
while (len) {
|
|
c = PRUint8(*input++);
|
|
len--;
|
|
if (c & 0x80) return PR_FALSE;
|
|
if (c == 0x1B) return PR_TRUE;
|
|
if (c == '~') {
|
|
switch (hz_state) {
|
|
case hz_initial:
|
|
case hz_seen:
|
|
if (*input == '{') {
|
|
hz_state = hz_escaped;
|
|
} else if (*input == '~') {
|
|
// ~~ is the HZ encoding of ~. Skip over second ~ as well
|
|
hz_state = hz_seen;
|
|
input++;
|
|
len--;
|
|
} else {
|
|
hz_state = hz_notpresent;
|
|
}
|
|
break;
|
|
|
|
case hz_escaped:
|
|
if (*input == '}') hz_state = hz_seen;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return hz_state == hz_seen;
|
|
}
|
|
|
|
#define REPLACEMENT_CHAR "\357\277\275" // EF BF BD (UTF-8 encoding of U+FFFD)
|
|
|
|
// copy 'raw' sequences of octets in aInput to aOutput.
|
|
// If aDefaultCharset is specified, the input is assumed to be in the
|
|
// charset and converted to UTF-8. Otherwise, a blind copy is made.
|
|
// If aDefaultCharset is specified, but the conversion to UTF-8
|
|
// is not successful, each octet is replaced by Unicode replacement
|
|
// chars. *aOutput is advanced by the number of output octets.
|
|
// static
|
|
void CopyRawHeader(const char *aInput, PRUint32 aLen,
|
|
const char *aDefaultCharset, nsACString &aOutput)
|
|
{
|
|
PRInt32 c;
|
|
|
|
// If aDefaultCharset is not specified, make a blind copy.
|
|
if (!aDefaultCharset || !*aDefaultCharset) {
|
|
aOutput.Append(aInput, aLen);
|
|
return;
|
|
}
|
|
|
|
// Copy as long as it's US-ASCII. An ESC may indicate ISO 2022
|
|
// A ~ may indicate it is HZ
|
|
while (aLen && (c = PRUint8(*aInput++)) != 0x1B && c != '~' && !(c & 0x80)) {
|
|
aOutput.Append(char(c));
|
|
aLen--;
|
|
}
|
|
if (!aLen) {
|
|
return;
|
|
}
|
|
aInput--;
|
|
|
|
// skip ASCIIness/UTF8ness test if aInput is supected to be a 7bit non-ascii
|
|
// string and aDefaultCharset is a 7bit non-ascii charset.
|
|
PRBool skipCheck = (c == 0x1B || c == '~') &&
|
|
IS_7BIT_NON_ASCII_CHARSET(aDefaultCharset);
|
|
|
|
// If not UTF-8, treat as default charset
|
|
nsCOMPtr<nsIUTF8ConverterService>
|
|
cvtUTF8(do_GetService(NS_UTF8CONVERTERSERVICE_CONTRACTID));
|
|
nsCAutoString utf8Text;
|
|
if (cvtUTF8 &&
|
|
NS_SUCCEEDED(
|
|
cvtUTF8->ConvertStringToUTF8(Substring(aInput, aInput + aLen),
|
|
aDefaultCharset, skipCheck, utf8Text))) {
|
|
aOutput.Append(utf8Text);
|
|
} else { // replace each octet with Unicode replacement char in UTF-8.
|
|
for (PRUint32 i = 0; i < aLen; i++) {
|
|
c = PRUint8(*aInput++);
|
|
if (c & 0x80)
|
|
aOutput.Append(REPLACEMENT_CHAR);
|
|
else
|
|
aOutput.Append(char(c));
|
|
}
|
|
}
|
|
}
|
|
|
|
static const char especials[] = "()<>@,;:\\\"/[]?.=";
|
|
|
|
// |decode_mime_part2_str| taken from comi18n.c
|
|
// Decode RFC2047-encoded words in the input and convert the result to UTF-8.
|
|
// If aOverrideCharset is true, charset in RFC2047-encoded words is
|
|
// ignored and aDefaultCharset is assumed, instead. aDefaultCharset
|
|
// is also used to convert raw octets (without RFC 2047 encoding) to UTF-8.
|
|
//static
|
|
nsresult DecodeRFC2047Str(const char *aHeader, const char *aDefaultCharset,
|
|
PRBool aOverrideCharset, nsACString &aResult)
|
|
{
|
|
const char *p, *q, *r;
|
|
char *decodedText;
|
|
const char *begin; // tracking pointer for where we are in the input buffer
|
|
PRInt32 isLastEncodedWord = 0;
|
|
const char *charsetStart, *charsetEnd;
|
|
char charset[80];
|
|
|
|
// initialize charset name to an empty string
|
|
charset[0] = '\0';
|
|
|
|
begin = aHeader;
|
|
|
|
// To avoid buffer realloc, if possible, set capacity in advance. No
|
|
// matter what, more than 3x expansion can never happen for all charsets
|
|
// supported by Mozilla. SCSU/BCSU with the sliding window set to a
|
|
// non-BMP block may be exceptions, but Mozilla does not support them.
|
|
// Neither any known mail/news program use them. Even if there's, we're
|
|
// safe because we don't use a raw *char any more.
|
|
aResult.SetCapacity(3 * strlen(aHeader));
|
|
|
|
while ((p = PL_strstr(begin, "=?")) != 0) {
|
|
if (isLastEncodedWord) {
|
|
// See if it's all whitespace.
|
|
for (q = begin; q < p; ++q) {
|
|
if (!PL_strchr(" \t\r\n", *q)) break;
|
|
}
|
|
}
|
|
|
|
if (!isLastEncodedWord || q < p) {
|
|
// copy the part before the encoded-word
|
|
CopyRawHeader(begin, p - begin, aDefaultCharset, aResult);
|
|
begin = p;
|
|
}
|
|
|
|
p += 2;
|
|
|
|
// Get charset info
|
|
charsetStart = p;
|
|
charsetEnd = 0;
|
|
for (q = p; *q != '?'; q++) {
|
|
if (*q <= ' ' || PL_strchr(especials, *q)) {
|
|
goto badsyntax;
|
|
}
|
|
|
|
// RFC 2231 section 5
|
|
if (!charsetEnd && *q == '*') {
|
|
charsetEnd = q;
|
|
}
|
|
}
|
|
if (!charsetEnd) {
|
|
charsetEnd = q;
|
|
}
|
|
|
|
// Check for too-long charset name
|
|
if (PRUint32(charsetEnd - charsetStart) >= sizeof(charset))
|
|
goto badsyntax;
|
|
|
|
memcpy(charset, charsetStart, charsetEnd - charsetStart);
|
|
charset[charsetEnd - charsetStart] = 0;
|
|
|
|
q++;
|
|
if (*q != 'Q' && *q != 'q' && *q != 'B' && *q != 'b')
|
|
goto badsyntax;
|
|
|
|
if (q[1] != '?')
|
|
goto badsyntax;
|
|
|
|
r = q;
|
|
for (r = q + 2; *r != '?'; r++) {
|
|
if (*r < ' ') goto badsyntax;
|
|
}
|
|
if (r[1] != '=')
|
|
goto badsyntax;
|
|
else if (r == q + 2) {
|
|
// it's empty, skip
|
|
begin = r + 2;
|
|
isLastEncodedWord = 1;
|
|
continue;
|
|
}
|
|
|
|
if(*q == 'Q' || *q == 'q')
|
|
decodedText = DecodeQ(q + 2, r - (q + 2));
|
|
else {
|
|
// bug 227290. ignore an extraneous '=' at the end.
|
|
// (# of characters in B-encoded part has to be a multiple of 4)
|
|
PRInt32 n = r - (q + 2);
|
|
n -= (n % 4 == 1 && !PL_strncmp(r - 3, "===", 3)) ? 1 : 0;
|
|
decodedText = PL_Base64Decode(q + 2, n, nsnull);
|
|
}
|
|
|
|
if (decodedText == nsnull)
|
|
goto badsyntax;
|
|
|
|
// Override charset if requested. Never override labeled UTF-8.
|
|
// Use default charset instead of UNKNOWN-8BIT
|
|
if ((aOverrideCharset && 0 != nsCRT::strcasecmp(charset, "UTF-8")) ||
|
|
(aDefaultCharset && 0 == nsCRT::strcasecmp(charset, "UNKNOWN-8BIT"))) {
|
|
PL_strncpy(charset, aDefaultCharset, sizeof(charset) - 1);
|
|
charset[sizeof(charset) - 1] = '\0';
|
|
}
|
|
|
|
{
|
|
nsCOMPtr<nsIUTF8ConverterService>
|
|
cvtUTF8(do_GetService(NS_UTF8CONVERTERSERVICE_CONTRACTID));
|
|
nsCAutoString utf8Text;
|
|
// skip ASCIIness/UTF8ness test if aCharset is 7bit non-ascii charset.
|
|
if (cvtUTF8 &&
|
|
NS_SUCCEEDED(
|
|
cvtUTF8->ConvertStringToUTF8(nsDependentCString(decodedText),
|
|
charset, IS_7BIT_NON_ASCII_CHARSET(charset), utf8Text))) {
|
|
aResult.Append(utf8Text);
|
|
} else {
|
|
aResult.Append(REPLACEMENT_CHAR);
|
|
}
|
|
}
|
|
PR_Free(decodedText);
|
|
begin = r + 2;
|
|
isLastEncodedWord = 1;
|
|
continue;
|
|
|
|
badsyntax:
|
|
// copy the part before the encoded-word
|
|
aResult.Append(begin, p - begin);
|
|
begin = p;
|
|
isLastEncodedWord = 0;
|
|
}
|
|
|
|
// put the tail back
|
|
CopyRawHeader(begin, strlen(begin), aDefaultCharset, aResult);
|
|
|
|
nsCAutoString tempStr(aResult);
|
|
tempStr.ReplaceChar('\t', ' ');
|
|
aResult = tempStr;
|
|
|
|
return NS_OK;
|
|
}
|
|
|