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Diffstat (limited to 'mail/mail-mlist-magic.c')
| -rw-r--r-- | mail/mail-mlist-magic.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/mail/mail-mlist-magic.c b/mail/mail-mlist-magic.c new file mode 100644 index 0000000000..7385688f64 --- /dev/null +++ b/mail/mail-mlist-magic.c @@ -0,0 +1,252 @@ +/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ +/* mail-mlist-magic.c + * + * Copyright (C) 2000 Helix Code, 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 of the + * License, 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 program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + * + * Author: Ettore Perazzoli + */ + +/* Procmail-style magic mail rules for mailing lists: (from Joakim's own + `.procmailrc'.) + + :0: + * ^Sender: owner-\/[^@]+ + lists/$MATCH + + :0: + * ^X-BeenThere: \/[^@]+ + lists/$MATCH + + :0: + * ^Delivered-To: mailing list \/[^@]+ + lists/$MATCH + + :0: + * X-Mailing-List: <\/[^@]+ + lists/$MATCH + + :0: + * X-Loop: \/[^@]+ + lists/$MATCH + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <string.h> +#include <ctype.h> + +#include "camel.h" + +#include "mail-mlist-magic.h" + + +/* Utility functions. */ + +static char * +extract_until_at_sign (const char *s) +{ + const char *at_sign; + + at_sign = strchr (s, '@'); + if (at_sign == NULL) + return g_strdup (s); + + if (at_sign == s) + return NULL; + + return g_strndup (s, at_sign - s); +} + +static const char * +get_header (CamelMimeMessage *message, + const char *header_name) +{ + const char *value; + + value = camel_medium_get_header (CAMEL_MEDIUM (message), "Sender"); + if (value == NULL) + return NULL; + + /* FIXME: Correct? */ + while (isspace ((int) *value)) + value++; + + return value; +} + + +/* The checks. */ + +/* ^Sender: owner-\/[^@]+ */ +static char * +check_sender (CamelMimeMessage *message, + const char **header_name_return, + char **header_value_return) +{ + const char *value; + + value = get_header (message, "Sender"); + if (value == NULL) + return NULL; + + if (strncmp (value, "owner-", 6) != 0) + return NULL; + + if (value[6] == '\0' || value[6] == '@') + return NULL; + + *header_name_return = "Sender"; + *header_value_return = g_strdup (value); + return extract_until_at_sign (value + 6); +} + +/* ^X-BeenThere: \/[^@]+ */ +static char * +check_x_been_there (CamelMimeMessage *message, + const char **header_name_return, + char **header_value_return) +{ + const char *value; + + value = get_header (message, "X-BeenThere"); + if (value == NULL || *value == '@') + return NULL; + + *header_name_return = "X-BeenThere"; + *header_value_return = g_strdup (value); + + return extract_until_at_sign (value); +} + +/* ^Delivered-To: mailing list \/[^@]+ */ +static char * +check_delivered_to (CamelMimeMessage *message, + const char **header_name_return, + char **header_value_return) +{ + const char *value; + + value = get_header (message, "Delivered-To"); + if (value == NULL) + return NULL; + + /* FIXME uh? */ + if (strncmp (value, "mailing list ", 13) != 0) + return NULL; + + if (value[13] == '\0' || value[13] == '@') + return NULL; + + *header_name_return = "Delivered-To"; + *header_value_return = g_strdup (value); + return extract_until_at_sign (value + 13); +} + +/* X-Mailing-List: <\/[^@]+ */ +static char * +check_x_mailing_list (CamelMimeMessage *message, + const char **header_name_return, + char **header_value_return) +{ + const char *value; + int value_length; + + value = get_header (message, "X-Mailing-List"); + if (value == NULL) + return NULL; + + if (value[0] != '<' || value[1] == '\0' || value[1] == '@') + return NULL; + + value_length = strlen (value); + if (value[value_length - 1] != '>') + return NULL; + + *header_name_return = "X-Mailing-List"; + *header_value_return = g_strdup (value); + return extract_until_at_sign (value + 1); +} + +/* X-Loop: \/[^@]+ */ +static char * +check_x_loop (CamelMimeMessage *message, + const char **header_name_return, + char **header_value_return) +{ + const char *value; + + value = get_header (message, "X-Loop"); + if (value == NULL) + return NULL; + + if (*value == '\0' || *value == '@') + return NULL; + + *header_name_return = "X-Loop"; + *header_value_return = g_strdup (value); + + return extract_until_at_sign (value); +} + + +/** + * mail_mlist_magic_detect_list: + * @message: + * @header_name_return: + * @header_value_return: + * + * Detect if message was delivered by a mailing list. + * + * Return value: The name of the mailing list, if the message appears to be + * sent from a mailing list. NULL otherwise. + **/ +char * +mail_mlist_magic_detect_list (CamelMimeMessage *message, + const char **header_name_return, + char **header_value_return) +{ + char *list_name; + + g_return_val_if_fail (message != NULL, NULL); + g_return_val_if_fail (CAMEL_IS_MIME_MESSAGE (message), NULL); + + list_name = check_sender (message, header_name_return, header_value_return); + if (list_name != NULL) + return list_name; + + list_name = check_x_been_there (message, header_name_return, header_value_return); + if (list_name != NULL) + return list_name; + + list_name = check_delivered_to (message, header_name_return, header_value_return); + if (list_name != NULL) + return list_name; + + list_name = check_x_mailing_list (message, header_name_return, header_value_return); + if (list_name != NULL) + return list_name; + + list_name = check_x_loop (message, header_name_return, header_value_return); + if (list_name != NULL) + return list_name; + + return NULL; +} |