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Diffstat (limited to 'scripts/read-rfc822')
-rwxr-xr-x | scripts/read-rfc822 | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/scripts/read-rfc822 b/scripts/read-rfc822 deleted file mode 100755 index 660f0feb9..000000000 --- a/scripts/read-rfc822 +++ /dev/null @@ -1,133 +0,0 @@ -#!/bin/sh -# aside from this initial boilerplate, this is actually -*- scheme -*- code -main='(module-ref (resolve-module '\''(scripts read-rfc822)) '\'main')' -exec ${GUILE-guile} -l $0 -c "(apply $main (cdr (command-line)))" "$@" -!# -;;; read-rfc822 --- Validate RFC822 file by displaying it to stdout - -;; Copyright (C) 2002 Free Software Foundation, Inc. -;; -;; This program is free software; you can redistribute it and/or -;; modify it under the terms of the GNU General Public License as -;; published by the Free Software Foundation; either version 2, or -;; (at your option) any later version. -;; -;; This program is distributed in the hope that it will be useful, -;; but WITHOUT ANY WARRANTY; without even the implied warranty of -;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -;; General Public License for more details. -;; -;; You should have received a copy of the GNU General Public License -;; along with this software; see the file COPYING. If not, write to -;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330, -;; Boston, MA 02111-1307 USA - -;;; Author: Thien-Thi Nguyen <ttn@gnu.org> - -;;; Commentary: - -;; Usage: read-rfc822 FILE -;; -;; Read FILE, assumed to be in RFC822 format, and display it to stdout. -;; This is not very interesting, admittedly. -;; -;; For Scheme programming, this module exports two procs: -;; (read-rfc822 . args) ; only first arg used -;; (read-rfc822-silently port) -;; -;; Parse FILE (a string) or PORT, respectively, and return a query proc that -;; takes a symbol COMP, and returns the message component COMP. Supported -;; values for COMP (and the associated query return values) are: -;; from -- #f (reserved for future mbox support) -;; headers -- alist of (HEADER-SYMBOL . "VALUE-STRING") pairs, in order -;; body -- rest of the mail message, a string -;; body-lines -- rest of the mail message, as a list of lines -;; Any other query results in a "bad component" error. -;; -;; TODO: Add "-m" option (mbox support). - -;;; Code: - -(define-module (scripts read-rfc822) - :use-module (ice-9 regex) - :use-module (ice-9 rdelim) - :autoload (srfi srfi-13) (string-join) - :export (read-rfc822 read-rfc822-silently)) - -(define from-line-rx (make-regexp "^From ")) -(define header-name-rx (make-regexp "^([^:]+):[ \t]*")) -(define header-cont-rx (make-regexp "^[ \t]+")) - -(define option #f) ; for future "-m" - -(define (drain-message port) - (let loop ((line (read-line port)) (acc '())) - (cond ((eof-object? line) - (reverse acc)) - ((and option (regexp-exec from-line-rx line)) - (for-each (lambda (c) - (unread-char c port)) - (cons #\newline - (reverse (string->list line)))) - (reverse acc)) - (else - (loop (read-line port) (cons line acc)))))) - -(define (parse-message port) - (let* ((from (and option - (match:suffix (regexp-exec from-line-rx - (read-line port))))) - (body-lines #f) - (body #f) - (headers '()) - (add-header! (lambda (reversed-hlines) - (let* ((hlines (reverse reversed-hlines)) - (first (car hlines)) - (m (regexp-exec header-name-rx first)) - (name (string->symbol (match:substring m 1))) - (data (string-join - (cons (substring first (match:end m)) - (cdr hlines)) - " "))) - (set! headers (acons name data headers)))))) - ;; "From " is only one line - (let loop ((line (read-line port)) (current-header #f)) - (cond ((string-null? line) - (and current-header (add-header! current-header)) - (set! body-lines (drain-message port))) - ((regexp-exec header-cont-rx line) - => (lambda (m) - (loop (cdr lines) - (cons (match:suffix m) current-header)))) - (else - (and current-header (add-header! current-header)) - (loop (read-line port) (list line))))) - (set! headers (reverse headers)) - (lambda (component) - (case component - ((from) from) - ((body-lines) body-lines) - ((headers) headers) - ((body) (or body - (begin (set! body (string-join body-lines "\n" 'suffix)) - body))) - (else (error "bad component:" component)))))) - -(define (read-rfc822-silently port) - (parse-message port)) - -(define (display-rfc822 parse) - (cond ((parse 'from) => (lambda (from) (format #t "From ~A\n" from)))) - (for-each (lambda (header) - (format #t "~A: ~A\n" (car header) (cdr header))) - (parse 'headers)) - (format #t "\n~A" (parse 'body))) - -(define (read-rfc822 . args) - (let ((parse (read-rfc822-silently (open-file (car args) OPEN_READ)))) - (display-rfc822 parse)) - #t) - -(define main read-rfc822) - -;;; read-rfc822 ends here |