/* 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-headers.h" #include "sprinter.h" 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 format_part_reply (mime_node_t *node) { int i; if (node->envelope_file) { printf ("On %s, %s wrote:\n", notmuch_message_get_header (node->envelope_file, "date"), notmuch_message_get_header (node->envelope_file, "from")); } else if (GMIME_IS_MESSAGE (node->part)) { GMimeMessage *message = GMIME_MESSAGE (node->part); InternetAddressList *recipients; const char *recipients_string; printf ("> From: %s\n", g_mime_message_get_sender (message)); recipients = g_mime_message_get_recipients (message, GMIME_RECIPIENT_TYPE_TO); recipients_string = internet_address_list_to_string (recipients, 0); if (recipients_string) printf ("> To: %s\n", recipients_string); recipients = g_mime_message_get_recipients (message, GMIME_RECIPIENT_TYPE_CC); recipients_string = internet_address_list_to_string (recipients, 0); if (recipients_string) printf ("> Cc: %s\n", recipients_string); printf ("> Subject: %s\n", g_mime_message_get_subject (message)); printf ("> Date: %s\n", g_mime_message_get_date_as_string (message)); printf (">\n"); } else if (GMIME_IS_PART (node->part)) { GMimeContentType *content_type = g_mime_object_get_content_type (node->part); GMimeContentDisposition *disposition = g_mime_object_get_content_disposition (node->part); if (g_mime_content_type_is_type (content_type, "application", "pgp-encrypted") || g_mime_content_type_is_type (content_type, "application", "pgp-signature")) { /* Ignore PGP/MIME cruft parts */ } else if (g_mime_content_type_is_type (content_type, "text", "*") && !g_mime_content_type_is_type (content_type, "text", "html")) { GMimeStream *stream_stdout = g_mime_stream_file_new (stdout); g_mime_stream_file_set_owner (GMIME_STREAM_FILE (stream_stdout), FALSE); show_text_part_content (node->part, stream_stdout, NOTMUCH_SHOW_TEXT_PART_REPLY); 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 (node->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)); } } for (i = 0; i < node->nchildren; i++) format_part_reply (mime_node_child (node, i)); } typedef enum { USER_ADDRESS_IN_STRING, STRING_IN_USER_ADDRESS, STRING_IS_USER_ADDRESS, } address_match_t; /* Match given string against given address according to mode. */ static notmuch_bool_t match_address (const char *str, const char *address, address_match_t mode) { switch (mode) { case USER_ADDRESS_IN_STRING: return strcasestr (str, address) != NULL; case STRING_IN_USER_ADDRESS: return strcasestr (address, str) != NULL; case STRING_IS_USER_ADDRESS: return strcasecmp (address, str) == 0; } return FALSE; } /* Match given string against user's configured "primary" and "other" * addresses according to mode. */ static const char * address_match (const char *str, notmuch_config_t *config, address_match_t mode) { const char *primary; const char **other; size_t i, other_len; if (!str || *str == '\0') return NULL; primary = notmuch_config_get_user_primary_email (config); if (match_address (str, primary, mode)) return primary; other = notmuch_config_get_user_other_email (config, &other_len); for (i = 0; i < other_len; i++) { if (match_address (str, other[i], mode)) return other[i]; } return NULL; } /* Does the given string contain an address configured as one of the * user's "primary" or "other" addresses. If so, return the matching * address, NULL otherwise. */ static const char * user_address_in_string (const char *str, notmuch_config_t *config) { return address_match (str, config, USER_ADDRESS_IN_STRING); } /* Do any of the addresses configured as one of the user's "primary" * or "other" addresses contain the given string. If so, return the * matching address, NULL otherwise. */ static const char * string_in_user_address (const char *str, notmuch_config_t *config) { return address_match (str, config, STRING_IN_USER_ADDRESS); } /* Is the given address configured as one of the user's "primary" or * "other" addresses. */ static notmuch_bool_t address_is_users (const char *address, notmuch_config_t *config) { return address_match (address, config, STRING_IS_USER_ADDRESS) != NULL; } /* Scan addresses in 'list'. * * If 'message' is non-NULL, then 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'. * * If 'user_from' is non-NULL and *user_from is NULL, *user_from will * be set to the first address encountered in 'list' that is the * user's address. * * Return the number of addresses added to 'message'. (If 'message' is * NULL, the function returns 0 by definition.) */ static unsigned int scan_address_list (InternetAddressList *list, notmuch_config_t *config, GMimeMessage *message, GMimeRecipientType type, const char **user_from) { InternetAddress *address; int i; unsigned int n = 0; 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; n += scan_address_list (group_list, config, message, type, user_from); } 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 (user_from && *user_from == NULL) *user_from = addr; } else if (message) { g_mime_message_add_recipient (message, type, name, addr); n++; } } } return n; } /* Scan addresses in 'recipients'. * * See the documentation of scan_address_list() above. This function * does exactly the same, but converts 'recipients' to an * InternetAddressList first. */ static unsigned int scan_address_string (const char *recipients, notmuch_config_t *config, GMimeMessage *message, GMimeRecipientType type, const char **user_from) { InternetAddressList *list; if (recipients == NULL) return 0; list = internet_address_list_parse_string (recipients); if (list == NULL) return 0; return scan_address_list (list, config, message, type, user_from); } /* 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; } /* Augment the recipients of 'reply' from the "Reply-to:", "From:", * "To:", "Cc:", and "Bcc:" headers of 'message'. * * If 'reply_all' is true, use sender and all recipients, otherwise * scan the headers for the first that contains something other than * the user's addresses and add the recipients from this header * (typically this would be reply-to-sender, but also handles reply to * user's own message in a sensible way). * * 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, notmuch_bool_t reply_all) { 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; unsigned int n = 0; /* 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. This 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 *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); n += scan_address_string (recipients, config, reply, reply_to_map[i].recipient_type, &from_addr); if (!reply_all && n) { /* Stop adding new recipients in reply-to-sender mode if * we have added some recipient(s) above. * * This also handles the case of user replying to his own * message, where reply-to/from is not a recipient. In * this case there may be more than one recipient even if * not replying to all. */ reply = NULL; /* From address and some recipients are enough, bail out. */ if (from_addr) break; } } return from_addr; } static const char * guess_from_received_header (notmuch_config_t *config, notmuch_message_t *message) { const char *addr, *received, *by; char *mta,*ptr,*token; char *domain=NULL; char *tld=NULL; const char *delim=". \t"; size_t i; const char *to_headers[] = { "Envelope-to", "X-Original-To", "Delivered-To", }; /* 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 Delivered-To: header * 4) check for a (for ) clause in Received: headers * 5) 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 < ARRAY_SIZE (to_headers); i++) { const char *tohdr = notmuch_message_get_header (message, to_headers[i]); /* Note: tohdr potentially contains a list of email addresses. */ addr = user_address_in_string (tohdr, config); if (addr) return addr; } /* 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 concatenated. */ 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 "); /* Note: ptr potentially contains a list of email addresses. */ addr = user_address_in_string (ptr, config); if (addr) return addr; /* 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) { free (mta); break; } /* Now extract the last two components of the MTA host name * as domain and tld. */ domain = tld = NULL; 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) = '.'; addr = string_in_user_address (domain, config); if (addr) { free (mta); return addr; } } free (mta); } return NULL; } static GMimeMessage * create_reply_message(void *ctx, notmuch_config_t *config, notmuch_message_t *message, notmuch_bool_t reply_all) { const char *subject, *from_addr = NULL; const char *in_reply_to, *orig_references, *references; /* The 1 means we want headers in a "pretty" order. */ GMimeMessage *reply = g_mime_message_new (1); if (reply == NULL) { fprintf (stderr, "Out of memory\n"); return NULL; } 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, reply_all); 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); return reply; } static int notmuch_reply_format_default(void *ctx, notmuch_config_t *config, notmuch_query_t *query, notmuch_show_params_t *params, notmuch_bool_t reply_all) { GMimeMessage *reply; notmuch_messages_t *messages; notmuch_message_t *message; mime_node_t *root; for (messages = notmuch_query_search_messages (query); notmuch_messages_valid (messages); notmuch_messages_move_to_next (messages)) { message = notmuch_messages_get (messages); reply = create_reply_message (ctx, config, message, reply_all); /* If reply creation failed, we're out of memory, so don't * bother trying any more messages. */ if (!reply) { notmuch_message_destroy (message); return 1; } show_reply_headers (reply); g_object_unref (G_OBJECT (reply)); reply = NULL; if (mime_node_open (ctx, message, &(params->crypto), &root) == NOTMUCH_STATUS_SUCCESS) { format_part_reply (root); talloc_free (root); } notmuch_message_destroy (message); } return 0; } static int notmuch_reply_format_json(void *ctx, notmuch_config_t *config, notmuch_query_t *query, notmuch_show_params_t *params, notmuch_bool_t reply_all) { GMimeMessage *reply; notmuch_messages_t *messages; notmuch_message_t *message; mime_node_t *node; sprinter_t *sp; if (notmuch_query_count_messages (query) != 1) { fprintf (stderr, "Error: search term did not match precisely one message.\n"); return 1; } messages = notmuch_query_search_messages (query); message = notmuch_messages_get (messages); if (mime_node_open (ctx, message, &(params->crypto), &node) != NOTMUCH_STATUS_SUCCESS) return 1; reply = create_reply_message (ctx, config, message, reply_all); if (!reply) return 1; sp = sprinter_json_create (ctx, stdout); /* The headers of the reply message we've created */ printf ("{\"reply-headers\": "); format_headers_json (sp, reply, TRUE); g_object_unref (G_OBJECT (reply)); reply = NULL; /* Start the original */ printf (", \"original\": "); format_part_json (ctx, sp, node, TRUE, TRUE); /* End */ printf ("}\n"); 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, unused (notmuch_show_params_t *params), notmuch_bool_t reply_all) { 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_all); 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; } enum { FORMAT_DEFAULT, FORMAT_JSON, FORMAT_HEADERS_ONLY, }; int notmuch_reply_command (void *ctx, int argc, char *argv[]) { notmuch_config_t *config; notmuch_database_t *notmuch; notmuch_query_t *query; char *query_string; int opt_index, ret = 0; int (*reply_format_func)(void *ctx, notmuch_config_t *config, notmuch_query_t *query, notmuch_show_params_t *params, notmuch_bool_t reply_all); notmuch_show_params_t params = { .part = -1, .crypto = { .verify = FALSE, .decrypt = FALSE } }; int format = FORMAT_DEFAULT; int reply_all = TRUE; notmuch_opt_desc_t options[] = { { NOTMUCH_OPT_KEYWORD, &format, "format", 'f', (notmuch_keyword_t []){ { "default", FORMAT_DEFAULT }, { "json", FORMAT_JSON }, { "headers-only", FORMAT_HEADERS_ONLY }, { 0, 0 } } }, { NOTMUCH_OPT_KEYWORD, &reply_all, "reply-to", 'r', (notmuch_keyword_t []){ { "all", TRUE }, { "sender", FALSE }, { 0, 0 } } }, { NOTMUCH_OPT_BOOLEAN, ¶ms.crypto.decrypt, "decrypt", 'd', 0 }, { 0, 0, 0, 0, 0 } }; opt_index = parse_arguments (argc, argv, options, 1); if (opt_index < 0) { /* diagnostics already printed */ return 1; } if (format == FORMAT_HEADERS_ONLY) reply_format_func = notmuch_reply_format_headers_only; else if (format == FORMAT_JSON) reply_format_func = notmuch_reply_format_json; else reply_format_func = notmuch_reply_format_default; config = notmuch_config_open (ctx, NULL, NULL); if (config == NULL) return 1; query_string = query_string_from_args (ctx, argc-opt_index, argv+opt_index); 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; } if (notmuch_database_open (notmuch_config_get_database_path (config), NOTMUCH_DATABASE_MODE_READ_ONLY, ¬much)) 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, ¶ms, reply_all) != 0) return 1; notmuch_crypto_cleanup (¶ms.crypto); notmuch_query_destroy (query); notmuch_database_destroy (notmuch); return ret; }