/* 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 * Keith Packard */ #include "notmuch-client.h" #include "gmime-filter-reply.h" #include "gmime-filter-headers.h" static void reply_part_content (GMimeObject *part); static const notmuch_show_format_t format_reply = { "", "", NULL, "", NULL, "", "", NULL, NULL, reply_part_content, NULL, "", "", "", "", "" }; 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_content (GMimeObject *part) { GMimeContentType *content_type = g_mime_object_get_content_type (GMIME_OBJECT (part)); GMimeContentDisposition *disposition = g_mime_object_get_content_disposition (part); if (g_mime_content_type_is_type (content_type, "text", "*") && !g_mime_content_type_is_type (content_type, "text", "html")) { 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); } else { if (disposition && strcmp (disposition->disposition, GMIME_DISPOSITION_ATTACHMENT) == 0) { const char *filename = g_mime_part_get_filename (GMIME_PART (part)); printf ("Attachment: %s (%s)\n", filename, g_mime_content_type_to_string (content_type)); } 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 ) 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 " 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; const notmuch_show_format_t *format = &format_reply; notmuch_show_params_t params; params.part = -1; params.cryptoctx = NULL; 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), format, ¶ms); 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; }