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117 lines
4.9 KiB
EmacsLisp
117 lines
4.9 KiB
EmacsLisp
;;; mail-parse.el --- Interface functions for parsing mail -*- lexical-binding: t -*-
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;; Copyright (C) 1998-2023 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; This file is part of GNU Emacs.
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;; GNU Emacs 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 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs 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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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file contains wrapper functions for a wide range of mail
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;; parsing functions. The idea is that there are low-level libraries
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;; that implement according to various specs (RFC2231, DRUMS, USEFOR),
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;; but that programmers that want to parse some header (say,
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;; Content-Type) will want to use the latest spec.
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;;
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;; So while each low-level library (rfc2231.el, for instance) decodes
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;; faithfully according to that (proposed) standard, this library is
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;; the interface library. If some later RFC supersedes RFC2231, one
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;; would just have to write a new low-level library, adjust the
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;; aliases in this library, and the users and programmers won't notice
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;; any changes.
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;;; Code:
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(require 'mail-prsvr)
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(require 'ietf-drums)
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(require 'rfc2231)
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(require 'rfc2047)
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(require 'rfc2045)
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(defalias 'mail-header-parse-content-type 'rfc2231-parse-qp-string)
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(defalias 'mail-header-parse-content-disposition 'rfc2231-parse-qp-string)
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(defalias 'mail-content-type-get 'rfc2231-get-value)
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(defalias 'mail-header-encode-parameter 'rfc2047-encode-parameter)
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(defalias 'mail-header-remove-comments 'ietf-drums-remove-comments)
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(defalias 'mail-header-remove-whitespace 'ietf-drums-remove-whitespace)
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(defalias 'mail-header-strip 'ietf-drums-strip)
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(defalias 'mail-header-strip-cte 'ietf-drums-strip-cte)
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(defalias 'mail-header-get-comment 'ietf-drums-get-comment)
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(defalias 'mail-header-parse-address 'ietf-drums-parse-address)
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(defalias 'mail-header-parse-addresses 'ietf-drums-parse-addresses)
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(defalias 'mail-header-parse-date 'ietf-drums-parse-date)
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(defalias 'mail-narrow-to-head 'ietf-drums-narrow-to-header)
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(defalias 'mail-quote-string 'ietf-drums-quote-string)
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(defalias 'mail-header-make-address 'ietf-drums-make-address)
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(defalias 'mail-header-fold-field 'rfc2047-fold-field)
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(defalias 'mail-header-unfold-field 'rfc2047-unfold-field)
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(defalias 'mail-header-narrow-to-field 'rfc2047-narrow-to-field)
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(defalias 'mail-header-field-value 'rfc2047-field-value)
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(defalias 'mail-encode-encoded-word-region 'rfc2047-encode-region)
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(defalias 'mail-encode-encoded-word-buffer 'rfc2047-encode-message-header)
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(defalias 'mail-encode-encoded-word-string 'rfc2047-encode-string)
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(defalias 'mail-decode-encoded-word-region 'rfc2047-decode-region)
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(defalias 'mail-decode-encoded-word-string 'rfc2047-decode-string)
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(defalias 'mail-decode-encoded-address-region 'rfc2047-decode-address-region)
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(defalias 'mail-decode-encoded-address-string 'rfc2047-decode-address-string)
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(defun mail-header-parse-addresses-lax (string)
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"Parse STRING as a comma-separated list of mail addresses.
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The return value is a list with mail/name pairs."
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(delq nil
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(mapcar (lambda (elem)
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(or (ignore-errors
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(mail-header-parse-address elem))
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(mail-header-parse-address-lax elem)))
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(mail-header-parse-addresses string t))))
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(defun mail-header-parse-address-lax (string)
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"Parse STRING as a mail address.
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Returns a mail/name pair.
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This function uses heuristics to determine the email address and
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the name in the string. If you have an RFC822(bis)
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standards-compliant STRING, use `mail-header-parse-address'
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instead."
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(with-temp-buffer
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(insert (string-clean-whitespace string))
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;; Find the bit with the @ and guess that that's the mail.
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(goto-char (point-max))
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(when (search-backward "@" nil t)
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(if (re-search-backward " " nil t)
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(forward-char 1)
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(goto-char (point-min)))
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(let* ((start (point))
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(mail (buffer-substring
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start (or (re-search-forward " " nil t)
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(goto-char (point-max))))))
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(delete-region start (point))
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;; We've now removed the email bit, so the rest of the stuff
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;; has to be the name.
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(cons (string-trim mail "[<]+" "[>]+")
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(let ((name (string-trim (buffer-string)
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"[ \t\n\r(]+" "[ \t\n\r)]+")))
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(if (length= name 0)
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nil
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name)))))))
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(provide 'mail-parse)
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;;; mail-parse.el ends here
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