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215 lines
10 KiB
Plaintext
215 lines
10 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim:expandtab:shiftwidth=4: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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* Jungshik Shin <jshin@mailaps.org>
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* Portions created by the Initial Developer are Copyright (C) 2003.
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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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/*
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* This interface allows any module to access the routine
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* for MIME header parameter parsing (RFC 2231/5987)
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*/
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#include "nsISupports.idl"
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[scriptable, uuid(ddbbdfb8-a1c0-4dd5-a31b-5d2a7a3bb6ec)]
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interface nsIMIMEHeaderParam : nsISupports {
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/**
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* Given the value of a single header field (such as
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* Content-Disposition and Content-Type) and the name of a parameter
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* (e.g. filename, name, charset), returns the value of the parameter.
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* The value is obtained by decoding RFC 2231-style encoding,
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* RFC 2047-style encoding, and converting to UniChar(UTF-16)
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* from charset specified in RFC 2231/2047 encoding, UTF-8,
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* <code>aFallbackCharset</code>, the locale charset as fallback if
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* <code>TryLocaleCharset</code> is set, and null-padding as last resort
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* if all else fails.
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*
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* <p>
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* This method internally invokes <code>getParameterInternal</code>,
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* However, it does not stop at decoding RFC 2231 (the task for
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* <code>getParameterInternal</code> but tries to cope
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* with several non-standard-compliant cases mentioned below.
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*
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* <p>
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* Note that a lot of MUAs and HTTP servers put RFC 2047-encoded parameters
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* in mail headers and HTTP headers. Unfortunately, this includes Mozilla
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* as of 2003-05-30. Even more standard-ignorant MUAs, web servers and
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* application servers put 'raw 8bit characters'. This will try to cope
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* with all these cases as gracefully as possible. Additionally, it
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* returns the language tag if the parameter is encoded per RFC 2231 and
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* includes lang.
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*
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*
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*
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* @param aHeaderVal a header string to get the value of a parameter
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* from.
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* @param aParamName the name of a MIME header parameter (e.g.
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* filename, name, charset). If empty, returns
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* the first (possibly) _unnamed_ 'parameter'.
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* @param aFallbackCharset fallback charset to try if the string after
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* RFC 2231/2047 decoding or the raw 8bit
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* string is not UTF-8
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* @param aTryLocaleCharset If set, makes yet another attempt
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* with the locale charset.
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* @param aLang If non-null, assigns it to a pointer
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* to a string containing the value of language
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* obtained from RFC 2231 parsing. Caller has to
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* nsMemory::Free it.
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* @return the value of <code>aParamName</code> in Unichar(UTF-16).
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*/
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AString getParameter(in ACString aHeaderVal,
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in string aParamName,
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in ACString aFallbackCharset,
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in boolean aTryLocaleCharset,
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out string aLang);
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/**
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* Like getParameter, but using RFC 5987 instead of 2231. This removes
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* support for header parameter continuations (foo*0, foo*1, etc).
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*/
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AString getParameter5987(in ACString aHeaderVal,
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in string aParamName,
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in ACString aFallbackCharset,
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in boolean aTryLocaleCharset,
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out string aLang);
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/**
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* Given the value of a single header field (such as
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* Content-Disposition and Content-Type) and the name of a parameter
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* (e.g. filename, name, charset), returns the value of the parameter
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* after decoding RFC 2231-style encoding.
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* <p>
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* For <strong>internal use only</strong>. The only other place where
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* this needs to be invoked is |MimeHeaders_get_parameter| in
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* mailnews/mime/src/mimehdrs.cpp defined as
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* char * MimeHeaders_get_parameter (const char *header_value,
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* const char *parm_name,
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* char **charset, char **language)
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*
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* Otherwise, this method would have been made static.
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*
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* @param aHeaderVal a header string to get the value of a parameter from.
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* @param aParamName the name of a MIME header parameter (e.g.
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* filename, name, charset). If empty, returns
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* the first (possibly) _unnamed_ 'parameter'.
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* @param aCharset If non-null, it gets assigned a new pointer
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* to a string containing the value of charset obtained
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* from RFC 2231 parsing. Caller has to nsMemory::Free it.
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* @param aLang If non-null, it gets assigned a new pointer
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* to a string containing the value of language obtained
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* from RFC 2231 parsing. Caller has to nsMemory::Free it.
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* @return the value of <code>aParamName</code> after
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* RFC 2231 decoding but without charset conversion.
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*/
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[noscript]
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string getParameterInternal(in string aHeaderVal,
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in string aParamName,
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out string aCharset,
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out string aLang);
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/**
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* Given a header value, decodes RFC 2047-style encoding and
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* returns the decoded header value in UTF-8 if either it's
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* RFC-2047-encoded or aDefaultCharset is given. Otherwise,
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* returns the input header value (in whatever encoding)
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* as it is except that RFC 822 (using backslash) quotation and
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* CRLF (if aEatContinuation is set) are stripped away
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* <p>
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* For internal use only. The only other place where this needs to be
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* invoked is <code>MIME_DecodeMimeHeader</code> in
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* mailnews/mime/src/mimehdrs.cpp defined as
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* char * Mime_DecodeMimeHeader(char *header_val, const char *charset,
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* bool override, bool eatcontinuation)
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*
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* @param aHeaderVal a header value to decode
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* @param aDefaultCharset MIME charset to use in place of MIME charset
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* specified in RFC 2047 style encoding
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* when <code>aOverrideCharset</code> is set.
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* @param aOverrideCharset When set, overrides MIME charset specified
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* in RFC 2047 style encoding with <code>aDefaultCharset</code>
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* @param aEatContinuation When set, removes CR/LF
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* @return decoded header value
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*/
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[noscript]
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ACString decodeRFC2047Header(in string aHeaderVal,
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in string aDefaultCharset,
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in boolean aOverrideCharset,
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in boolean aEatContinuation);
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/**
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* Given a header parameter, decodes RFC 2047 style encoding (if it's
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* not obtained from RFC 2231 encoding), converts it to
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* UTF-8 and returns the result in UTF-8 if an attempt to extract
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* charset info. from a few different sources succeeds.
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* Otherwise, returns the input header value (in whatever encoding)
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* as it is except that RFC 822 (using backslash) quotation is
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* stripped off.
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* <p>
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* For internal use only. The only other place where this needs to be
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* invoked is <code>mime_decode_filename</code> in
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* mailnews/mime/src/mimehdrs.cpp defined as
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* char * mime_decode_filename(char *name, const char *charset,
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* MimeDisplayOptions *opt)
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*
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* @param aParamValue the value of a parameter to decode and convert
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* @param aCharset charset obtained from RFC 2231 decoding in which
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* <code>aParamValue</code> is encoded. If null,
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* indicates that it needs to try RFC 2047, instead.
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* @param aDefaultCharset MIME charset to use when aCharset is null and
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* cannot be obtained per RFC 2047 (most likely
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* because 'bare' string is used.) Besides, it
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* overrides aCharset/MIME charset obtained from
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* RFC 2047 if <code>aOverrideCharset</code> is set.
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* @param aOverrideCharset When set, overrides MIME charset specified
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* in RFC 2047 style encoding with
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* <code>aDefaultCharset</code>
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* @return decoded parameter
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*/
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[noscript]
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ACString decodeParameter(in ACString aParamValue,
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in string aCharset,
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in string aDefaultCharset,
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in boolean aOverrideCharset);
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};
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