Permalink
Fetching contributors…
Cannot retrieve contributors at this time
641 lines (548 sloc) 18.7 KB
/* notmuch - Not much of an email program, (just index and search)
*
* Copyright © 2009 Carl Worth
* Copyright © 2009 Keith Packard
*
* 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 3 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, see http://www.gnu.org/licenses/ .
*
* Authors: Carl Worth <cworth@cworth.org>
* Keith Packard <keithp@keithp.com>
*/
#include "notmuch-client.h"
#include "gmime-filter-reply.h"
#include "gmime-filter-headers.h"
static void
reply_part_content (GMimeObject *part)
{
GMimeStream *stream_stdout = NULL, *stream_filter = NULL;
GMimeDataWrapper *wrapper;
const char *charset;
charset = g_mime_object_get_content_type_parameter (part, "charset");
stream_stdout = g_mime_stream_file_new (stdout);
if (stream_stdout) {
g_mime_stream_file_set_owner (GMIME_STREAM_FILE (stream_stdout), FALSE);
stream_filter = g_mime_stream_filter_new(stream_stdout);
if (charset) {
g_mime_stream_filter_add(GMIME_STREAM_FILTER(stream_filter),
g_mime_filter_charset_new(charset, "UTF-8"));
}
}
g_mime_stream_filter_add(GMIME_STREAM_FILTER(stream_filter),
g_mime_filter_reply_new(TRUE));
wrapper = g_mime_part_get_content_object (GMIME_PART (part));
if (wrapper && stream_filter)
g_mime_data_wrapper_write_to_stream (wrapper, stream_filter);
if (stream_filter)
g_object_unref(stream_filter);
if (stream_stdout)
g_object_unref(stream_stdout);
}
static void
show_reply_headers (GMimeMessage *message)
{
GMimeStream *stream_stdout = NULL, *stream_filter = NULL;
stream_stdout = g_mime_stream_file_new (stdout);
if (stream_stdout) {
g_mime_stream_file_set_owner (GMIME_STREAM_FILE (stream_stdout), FALSE);
stream_filter = g_mime_stream_filter_new(stream_stdout);
if (stream_filter) {
g_mime_stream_filter_add(GMIME_STREAM_FILTER(stream_filter),
g_mime_filter_headers_new());
g_mime_object_write_to_stream(GMIME_OBJECT(message), stream_filter);
g_object_unref(stream_filter);
}
g_object_unref(stream_stdout);
}
}
static void
reply_part (GMimeObject *part, int *part_count)
{
GMimeContentDisposition *disposition;
GMimeContentType *content_type;
(void) part_count;
disposition = g_mime_object_get_content_disposition (part);
if (disposition &&
strcmp (disposition->disposition, GMIME_DISPOSITION_ATTACHMENT) == 0)
{
const char *filename = g_mime_part_get_filename (GMIME_PART (part));
content_type = g_mime_object_get_content_type (GMIME_OBJECT (part));
if (g_mime_content_type_is_type (content_type, "text", "*") &&
!g_mime_content_type_is_type (content_type, "text", "html"))
{
reply_part_content (part);
}
else
{
printf ("Attachment: %s (%s)\n", filename,
g_mime_content_type_to_string (content_type));
}
return;
}
content_type = g_mime_object_get_content_type (GMIME_OBJECT (part));
if (g_mime_content_type_is_type (content_type, "text", "*") &&
!g_mime_content_type_is_type (content_type, "text", "html"))
{
reply_part_content (part);
}
else
{
printf ("Non-text part: %s\n",
g_mime_content_type_to_string (content_type));
}
}
/* Is the given address configured as one of the user's "personal" or
* "other" addresses. */
static int
address_is_users (const char *address, notmuch_config_t *config)
{
const char *primary;
const char **other;
size_t i, other_len;
primary = notmuch_config_get_user_primary_email (config);
if (strcasecmp (primary, address) == 0)
return 1;
other = notmuch_config_get_user_other_email (config, &other_len);
for (i = 0; i < other_len; i++)
if (strcasecmp (other[i], address) == 0)
return 1;
return 0;
}
/* For each address in 'list' that is not configured as one of the
* user's addresses in 'config', add that address to 'message' as an
* address of 'type'.
*
* The first address encountered that *is* the user's address will be
* returned, (otherwise NULL is returned).
*/
static const char *
add_recipients_for_address_list (GMimeMessage *message,
notmuch_config_t *config,
GMimeRecipientType type,
InternetAddressList *list)
{
InternetAddress *address;
int i;
const char *ret = NULL;
for (i = 0; i < internet_address_list_length (list); i++) {
address = internet_address_list_get_address (list, i);
if (INTERNET_ADDRESS_IS_GROUP (address)) {
InternetAddressGroup *group;
InternetAddressList *group_list;
group = INTERNET_ADDRESS_GROUP (address);
group_list = internet_address_group_get_members (group);
if (group_list == NULL)
continue;
add_recipients_for_address_list (message, config,
type, group_list);
} else {
InternetAddressMailbox *mailbox;
const char *name;
const char *addr;
mailbox = INTERNET_ADDRESS_MAILBOX (address);
name = internet_address_get_name (address);
addr = internet_address_mailbox_get_addr (mailbox);
if (address_is_users (addr, config)) {
if (ret == NULL)
ret = addr;
} else {
g_mime_message_add_recipient (message, type, name, addr);
}
}
}
return ret;
}
/* For each address in 'recipients' that is not configured as one of
* the user's addresses in 'config', add that address to 'message' as
* an address of 'type'.
*
* The first address encountered that *is* the user's address will be
* returned, (otherwise NULL is returned).
*/
static const char *
add_recipients_for_string (GMimeMessage *message,
notmuch_config_t *config,
GMimeRecipientType type,
const char *recipients)
{
InternetAddressList *list;
if (recipients == NULL)
return NULL;
list = internet_address_list_parse_string (recipients);
if (list == NULL)
return NULL;
return add_recipients_for_address_list (message, config, type, list);
}
/* Does the address in the Reply-To header of 'message' already appear
* in either the 'To' or 'Cc' header of the message?
*/
static int
reply_to_header_is_redundant (notmuch_message_t *message)
{
const char *reply_to, *to, *cc, *addr;
InternetAddressList *list;
InternetAddress *address;
InternetAddressMailbox *mailbox;
reply_to = notmuch_message_get_header (message, "reply-to");
if (reply_to == NULL || *reply_to == '\0')
return 0;
list = internet_address_list_parse_string (reply_to);
if (internet_address_list_length (list) != 1)
return 0;
address = internet_address_list_get_address (list, 0);
if (INTERNET_ADDRESS_IS_GROUP (address))
return 0;
mailbox = INTERNET_ADDRESS_MAILBOX (address);
addr = internet_address_mailbox_get_addr (mailbox);
to = notmuch_message_get_header (message, "to");
cc = notmuch_message_get_header (message, "cc");
if ((to && strstr (to, addr) != 0) ||
(cc && strstr (cc, addr) != 0))
{
return 1;
}
return 0;
}
/* Augments the recipients of reply from the headers of message.
*
* If any of the user's addresses were found in these headers, the first
* of these returned, otherwise NULL is returned.
*/
static const char *
add_recipients_from_message (GMimeMessage *reply,
notmuch_config_t *config,
notmuch_message_t *message)
{
struct {
const char *header;
const char *fallback;
GMimeRecipientType recipient_type;
} reply_to_map[] = {
{ "reply-to", "from", GMIME_RECIPIENT_TYPE_TO },
{ "to", NULL, GMIME_RECIPIENT_TYPE_TO },
{ "cc", NULL, GMIME_RECIPIENT_TYPE_CC },
{ "bcc", NULL, GMIME_RECIPIENT_TYPE_BCC }
};
const char *from_addr = NULL;
unsigned int i;
/* Some mailing lists munge the Reply-To header despite it being A Bad
* Thing, see http://www.unicom.com/pw/reply-to-harmful.html
*
* The munging is easy to detect, because it results in a
* redundant reply-to header, (with an address that already exists
* in either To or Cc). So in this case, we ignore the Reply-To
* field and use the From header. Thie ensures the original sender
* will get the reply even if not subscribed to the list. Note
* that the address in the Reply-To header will always appear in
* the reply.
*/
if (reply_to_header_is_redundant (message)) {
reply_to_map[0].header = "from";
reply_to_map[0].fallback = NULL;
}
for (i = 0; i < ARRAY_SIZE (reply_to_map); i++) {
const char *addr, *recipients;
recipients = notmuch_message_get_header (message,
reply_to_map[i].header);
if ((recipients == NULL || recipients[0] == '\0') && reply_to_map[i].fallback)
recipients = notmuch_message_get_header (message,
reply_to_map[i].fallback);
addr = add_recipients_for_string (reply, config,
reply_to_map[i].recipient_type,
recipients);
if (from_addr == NULL)
from_addr = addr;
}
return from_addr;
}
static const char *
guess_from_received_header (notmuch_config_t *config, notmuch_message_t *message)
{
const char *received,*primary,*by;
const char **other;
char *tohdr;
char *mta,*ptr,*token;
char *domain=NULL;
char *tld=NULL;
const char *delim=". \t";
size_t i,j,other_len;
const char *to_headers[] = {"Envelope-to", "X-Original-To"};
primary = notmuch_config_get_user_primary_email (config);
other = notmuch_config_get_user_other_email (config, &other_len);
/* sadly, there is no standard way to find out to which email
* address a mail was delivered - what is in the headers depends
* on the MTAs used along the way. So we are trying a number of
* heuristics which hopefully will answer this question.
* We only got here if none of the users email addresses are in
* the To: or Cc: header. From here we try the following in order:
* 1) check for an Envelope-to: header
* 2) check for an X-Original-To: header
* 3) check for a (for <email@add.res>) clause in Received: headers
* 4) check for the domain part of known email addresses in the
* 'by' part of Received headers
* If none of these work, we give up and return NULL
*/
for (i = 0; i < sizeof(to_headers)/sizeof(*to_headers); i++) {
tohdr = xstrdup(notmuch_message_get_header (message, to_headers[i]));
if (tohdr && *tohdr) {
/* tohdr is potentialy a list of email addresses, so here we
* check if one of the email addresses is a substring of tohdr
*/
if (strcasestr(tohdr, primary)) {
free(tohdr);
return primary;
}
for (j = 0; j < other_len; j++)
if (strcasestr (tohdr, other[j])) {
free(tohdr);
return other[j];
}
free(tohdr);
}
}
/* We get the concatenated Received: headers and search from the
* front (last Received: header added) and try to extract from
* them indications to which email address this message was
* delivered.
* The Received: header is special in our get_header function
* and is always concated.
*/
received = notmuch_message_get_header (message, "received");
if (received == NULL)
return NULL;
/* First we look for a " for <email@add.res>" in the received
* header
*/
ptr = strstr (received, " for ");
if (ptr) {
/* the text following is potentialy a list of email addresses,
* so again we check if one of the email addresses is a
* substring of ptr
*/
if (strcasestr(ptr, primary)) {
return primary;
}
for (i = 0; i < other_len; i++)
if (strcasestr (ptr, other[i])) {
return other[i];
}
}
/* Finally, we parse all the " by MTA ..." headers to guess the
* email address that this was originally delivered to.
* We extract just the MTA here by removing leading whitespace and
* assuming that the MTA name ends at the next whitespace.
* We test for *(by+4) to be non-'\0' to make sure there's
* something there at all - and then assume that the first
* whitespace delimited token that follows is the receiving
* system in this step of the receive chain
*/
by = received;
while((by = strstr (by, " by ")) != NULL) {
by += 4;
if (*by == '\0')
break;
mta = xstrdup (by);
token = strtok(mta," \t");
if (token == NULL)
break;
/* Now extract the last two components of the MTA host name
* as domain and tld.
*/
while ((ptr = strsep (&token, delim)) != NULL) {
if (*ptr == '\0')
continue;
domain = tld;
tld = ptr;
}
if (domain) {
/* Recombine domain and tld and look for it among the configured
* email addresses.
* This time we have a known domain name and nothing else - so
* the test is the other way around: we check if this is a
* substring of one of the email addresses.
*/
*(tld-1) = '.';
if (strcasestr(primary, domain)) {
free(mta);
return primary;
}
for (i = 0; i < other_len; i++)
if (strcasestr (other[i],domain)) {
free(mta);
return other[i];
}
}
free (mta);
}
return NULL;
}
static int
notmuch_reply_format_default(void *ctx, notmuch_config_t *config, notmuch_query_t *query)
{
GMimeMessage *reply;
notmuch_messages_t *messages;
notmuch_message_t *message;
const char *subject, *from_addr = NULL;
const char *in_reply_to, *orig_references, *references;
for (messages = notmuch_query_search_messages (query);
notmuch_messages_valid (messages);
notmuch_messages_move_to_next (messages))
{
message = notmuch_messages_get (messages);
/* The 1 means we want headers in a "pretty" order. */
reply = g_mime_message_new (1);
if (reply == NULL) {
fprintf (stderr, "Out of memory\n");
return 1;
}
subject = notmuch_message_get_header (message, "subject");
if (subject) {
if (strncasecmp (subject, "Re:", 3))
subject = talloc_asprintf (ctx, "Re: %s", subject);
g_mime_message_set_subject (reply, subject);
}
from_addr = add_recipients_from_message (reply, config, message);
if (from_addr == NULL)
from_addr = guess_from_received_header (config, message);
if (from_addr == NULL)
from_addr = notmuch_config_get_user_primary_email (config);
from_addr = talloc_asprintf (ctx, "%s <%s>",
notmuch_config_get_user_name (config),
from_addr);
g_mime_object_set_header (GMIME_OBJECT (reply),
"From", from_addr);
in_reply_to = talloc_asprintf (ctx, "<%s>",
notmuch_message_get_message_id (message));
g_mime_object_set_header (GMIME_OBJECT (reply),
"In-Reply-To", in_reply_to);
orig_references = notmuch_message_get_header (message, "references");
references = talloc_asprintf (ctx, "%s%s%s",
orig_references ? orig_references : "",
orig_references ? " " : "",
in_reply_to);
g_mime_object_set_header (GMIME_OBJECT (reply),
"References", references);
show_reply_headers (reply);
g_object_unref (G_OBJECT (reply));
reply = NULL;
printf ("On %s, %s wrote:\n",
notmuch_message_get_header (message, "date"),
notmuch_message_get_header (message, "from"));
show_message_body (notmuch_message_get_filename (message), reply_part);
notmuch_message_destroy (message);
}
return 0;
}
/* This format is currently tuned for a git send-email --notmuch hook */
static int
notmuch_reply_format_headers_only(void *ctx, notmuch_config_t *config, notmuch_query_t *query)
{
GMimeMessage *reply;
notmuch_messages_t *messages;
notmuch_message_t *message;
const char *in_reply_to, *orig_references, *references;
char *reply_headers;
for (messages = notmuch_query_search_messages (query);
notmuch_messages_valid (messages);
notmuch_messages_move_to_next (messages))
{
message = notmuch_messages_get (messages);
/* The 0 means we do not want headers in a "pretty" order. */
reply = g_mime_message_new (0);
if (reply == NULL) {
fprintf (stderr, "Out of memory\n");
return 1;
}
in_reply_to = talloc_asprintf (ctx, "<%s>",
notmuch_message_get_message_id (message));
g_mime_object_set_header (GMIME_OBJECT (reply),
"In-Reply-To", in_reply_to);
orig_references = notmuch_message_get_header (message, "references");
/* We print In-Reply-To followed by References because git format-patch treats them
* specially. Git does not interpret the other headers specially
*/
references = talloc_asprintf (ctx, "%s%s%s",
orig_references ? orig_references : "",
orig_references ? " " : "",
in_reply_to);
g_mime_object_set_header (GMIME_OBJECT (reply),
"References", references);
(void)add_recipients_from_message (reply, config, message);
reply_headers = g_mime_object_to_string (GMIME_OBJECT (reply));
printf ("%s", reply_headers);
free (reply_headers);
g_object_unref (G_OBJECT (reply));
reply = NULL;
notmuch_message_destroy (message);
}
return 0;
}
int
notmuch_reply_command (void *ctx, int argc, char *argv[])
{
notmuch_config_t *config;
notmuch_database_t *notmuch;
notmuch_query_t *query;
char *opt, *query_string;
int i, ret = 0;
int (*reply_format_func)(void *ctx, notmuch_config_t *config, notmuch_query_t *query);
reply_format_func = notmuch_reply_format_default;
for (i = 0; i < argc && argv[i][0] == '-'; i++) {
if (strcmp (argv[i], "--") == 0) {
i++;
break;
}
if (STRNCMP_LITERAL (argv[i], "--format=") == 0) {
opt = argv[i] + sizeof ("--format=") - 1;
if (strcmp (opt, "default") == 0) {
reply_format_func = notmuch_reply_format_default;
} else if (strcmp (opt, "headers-only") == 0) {
reply_format_func = notmuch_reply_format_headers_only;
} else {
fprintf (stderr, "Invalid value for --format: %s\n", opt);
return 1;
}
} else {
fprintf (stderr, "Unrecognized option: %s\n", argv[i]);
return 1;
}
}
argc -= i;
argv += i;
config = notmuch_config_open (ctx, NULL, NULL);
if (config == NULL)
return 1;
query_string = query_string_from_args (ctx, argc, argv);
if (query_string == NULL) {
fprintf (stderr, "Out of memory\n");
return 1;
}
if (*query_string == '\0') {
fprintf (stderr, "Error: notmuch reply requires at least one search term.\n");
return 1;
}
notmuch = notmuch_database_open (notmuch_config_get_database_path (config),
NOTMUCH_DATABASE_MODE_READ_ONLY);
if (notmuch == NULL)
return 1;
query = notmuch_query_create (notmuch, query_string);
if (query == NULL) {
fprintf (stderr, "Out of memory\n");
return 1;
}
if (reply_format_func (ctx, config, query) != 0)
return 1;
notmuch_query_destroy (query);
notmuch_database_close (notmuch);
return ret;
}