2006-04-06 [mones] 2.1.0cvs7
[claws.git] / src / plugins / spamassassin / spamassassin.c
index 37ef74af3bdeb9ea98637003866904a5a9d52dc2..9ac5dcf1d675de169afe3688aef6865921769d05 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
- * Copyright (C) 1999-2003 Hiroyuki Yamamoto and the Sylpheed-Claws Team
+ * Copyright (C) 1999-2006 Hiroyuki Yamamoto and the Sylpheed-Claws Team
  *
  * 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
@@ -45,6 +45,9 @@
 
 #include "libspamc.h"
 #include "spamassassin.h"
+#include "inc.h"
+#include "log.h"
+#include "prefs_common.h"
 
 #ifdef HAVE_SYSEXITS_H
 #include <sysexits.h>
@@ -73,14 +76,15 @@ enum {
     TIMEOUT_RUNNING = 1 << 1,
 };
 
-static guint hook_id;
+static guint hook_id = -1;
 static int flags = SPAMC_RAW_MODE | SPAMC_SAFE_FALLBACK | SPAMC_CHECK_ONLY;
-static gchar *username = NULL;
 static MessageCallback message_callback;
 
 static SpamAssassinConfig config;
 
 static PrefParam param[] = {
+       {"enable", "FALSE", &config.enable, P_BOOL,
+       NULL, NULL, NULL},
        {"transport", "0", &config.transport, P_INT,
         NULL, NULL, NULL},
        {"hostname", "localhost", &config.hostname, P_STRING,
@@ -89,6 +93,8 @@ static PrefParam param[] = {
         NULL, NULL, NULL},
        {"socket", "", &config.socket, P_STRING,
         NULL, NULL, NULL},
+       {"process_emails", "TRUE", &config.process_emails, P_BOOL,
+        NULL, NULL, NULL},
        {"receive_spam", "TRUE", &config.receive_spam, P_BOOL,
         NULL, NULL, NULL},
        {"save_folder", NULL, &config.save_folder, P_STRING,
@@ -97,6 +103,8 @@ static PrefParam param[] = {
         NULL, NULL, NULL},
        {"timeout", "30", &config.timeout, P_INT,
         NULL, NULL, NULL},
+       {"username", "", &config.username, P_STRING,
+        NULL, NULL, NULL},
 
        {NULL, NULL, NULL, P_OTHER, NULL, NULL, NULL}
 };
@@ -118,6 +126,9 @@ static gboolean msg_is_spam(FILE *fp)
        struct message m;
        gboolean is_spam = FALSE;
 
+       if (!config.enable)
+               return FALSE;
+
        transport_init(&trans);
        switch (config.transport) {
        case SPAMASSASSIN_TRANSPORT_LOCALHOST:
@@ -138,6 +149,7 @@ static gboolean msg_is_spam(FILE *fp)
        }
 
        if (transport_setup(&trans, flags) != EX_OK) {
+               log_error("Spamassassin plugin couldn't connect to spamd.\n");
                debug_print("failed to setup transport\n");
                return FALSE;
        }
@@ -152,7 +164,7 @@ static gboolean msg_is_spam(FILE *fp)
                return FALSE;
        }
 
-       if (message_filter(&trans, username, flags, &m) != EX_OK) {
+       if (message_filter(&trans, config.username, flags, &m) != EX_OK) {
                debug_print("filtering the message failed\n");
                message_cleanup(&m);
                return FALSE;
@@ -175,9 +187,11 @@ static gboolean mail_filtering_hook(gpointer source, gpointer data)
        int pid = 0;
        int status;
 
-       if (config.transport == SPAMASSASSIN_DISABLED)
+       /* SPAMASSASSIN_DISABLED : keep test for compatibility purpose */
+       if (!config.enable || config.transport == SPAMASSASSIN_DISABLED) {
+               log_error("Spamassassin plugin is disabled by its preferences.\n");
                return FALSE;
-
+       }
        debug_print("Filtering message %d\n", msginfo->msgnum);
        if (message_callback != NULL)
                message_callback(_("SpamAssassin: filtering message..."));
@@ -222,7 +236,7 @@ static gboolean mail_filtering_hook(gpointer source, gpointer data)
 
        if (is_spam) {
                debug_print("message is spam\n");
-                           
+               procmsg_msginfo_set_flags(msginfo, MSG_SPAM, 0);
                if (config.receive_spam) {
                        FolderItem *save_folder;
 
@@ -232,14 +246,17 @@ static gboolean mail_filtering_hook(gpointer source, gpointer data)
                                save_folder = folder_get_default_trash();
 
                        procmsg_msginfo_unset_flags(msginfo, ~0, 0);
+                       procmsg_msginfo_set_flags(msginfo, MSG_SPAM, 0);
                        folder_item_move_msg(save_folder, msginfo);
                } else {
                        folder_item_remove_msg(msginfo->folder, msginfo->msgnum);
                }
 
                return TRUE;
+       } else {
+               debug_print("message is ham\n");
+               procmsg_msginfo_unset_flags(msginfo, MSG_SPAM, 0);
        }
-       
        return FALSE;
 }
 
@@ -248,6 +265,125 @@ SpamAssassinConfig *spamassassin_get_config(void)
        return &config;
 }
 
+gchar* spamassassin_create_tmp_spamc_wrapper(gboolean spam)
+{
+       gchar *contents;
+       gchar *fname = get_tmp_file();
+
+       if (fname != NULL) {
+               contents = g_strdup_printf(
+                                               "spamc -d %s -p %u -u %s -t %u -s %u -L %s<\"$*\";exit $?",
+                                               config.hostname, config.port, 
+                                               config.username, config.timeout,
+                                               config.max_size * 1024, spam?"spam":"ham");
+               if (str_write_to_file(contents, fname) < 0) {
+                       g_free(fname);
+                       fname = NULL;
+               }
+               g_free(contents);
+       }
+       /* returned pointer must be free'ed by caller */
+       return fname;
+}
+
+int spamassassin_learn(MsgInfo *msginfo, GSList *msglist, gboolean spam)
+{
+       gchar *cmd = NULL;
+       gchar *file = NULL;
+       const gchar *shell = g_getenv("SHELL");
+       gchar *spamc_wrapper = NULL;
+
+       if (msginfo == NULL && msglist == NULL) {
+               return -1;
+       }
+
+       if (config.transport == SPAMASSASSIN_TRANSPORT_TCP
+       &&  prefs_common.work_offline
+       &&  !inc_offline_should_override(
+               _("Sylpheed-Claws needs network access in order "
+                 "to feed this mail(s) to the remote learner."))) {
+               return -1;
+       }
+
+       if (msginfo) {
+               file = procmsg_get_message_file(msginfo);
+               if (file == NULL) {
+                       return -1;
+               }
+               if (config.transport == SPAMASSASSIN_TRANSPORT_TCP) {
+                       spamc_wrapper = spamassassin_create_tmp_spamc_wrapper(spam);
+                       if (spamc_wrapper != NULL) {
+                               cmd = g_strconcat(shell?shell:"sh", " ",
+                                                               spamc_wrapper, " ", file, NULL);
+                       }
+               } else {
+                       cmd = g_strdup_printf("sa-learn -u %s %s %s %s",
+                                                       config.username,
+                                                       prefs_common.work_offline?"-L":"",
+                                                       spam?"--spam":"--ham", file);
+               }
+       }
+       if (msglist) {
+               GSList *cur = msglist;
+               MsgInfo *info;
+
+               if (config.transport == SPAMASSASSIN_TRANSPORT_TCP) {
+                       /* execute n-times the spamc command */
+                       for (; cur; cur = cur->next) {
+                               info = (MsgInfo *)cur->data;
+                               gchar *tmpcmd = NULL;
+                               gchar *tmpfile = get_tmp_file();
+
+                               if (spamc_wrapper == NULL) {
+                                       spamc_wrapper = spamassassin_create_tmp_spamc_wrapper(spam);
+                               }
+
+                               if (spamc_wrapper && tmpfile &&
+                               copy_file(procmsg_get_message_file(info), tmpfile, TRUE) == 0) {
+                                       tmpcmd = g_strconcat(shell?shell:"sh", " ", spamc_wrapper, " ",
+                                                                               tmpfile, NULL);
+                                       debug_print("%s\n", tmpcmd);
+                                       execute_command_line(tmpcmd, FALSE);
+                                       g_free(tmpcmd);
+                               }
+                               g_free(tmpfile);
+                       }
+                       g_free(spamc_wrapper);
+                       return 0;
+               } else {
+                       cmd = g_strdup_printf("sa-learn -u %s %s %s",
+                                       config.username,
+                                       prefs_common.work_offline?"-L":"",
+                                       spam?"--spam":"--ham");
+
+                       /* concatenate all message tmpfiles to the sa-learn command-line */
+                       for (; cur; cur = cur->next) {
+                               info = (MsgInfo *)cur->data;
+                               gchar *tmpcmd = NULL;
+                               gchar *tmpfile = get_tmp_file();
+
+                               if (tmpfile &&
+                               copy_file(procmsg_get_message_file(info), tmpfile, TRUE) == 0) {                        
+                                       tmpcmd = g_strconcat(cmd, " ", tmpfile, NULL);
+                                       g_free(cmd);
+                                       cmd = tmpcmd;
+                               }
+                               g_free(tmpfile);
+                       }
+               }
+       }
+       if (cmd == NULL) {
+               return -1;
+       }
+       debug_print("%s\n", cmd);
+       /* only run sync calls to sa-learn/spamc to prevent system lockdown */
+       execute_command_line(cmd, FALSE);
+       g_free(cmd);
+       g_free(spamc_wrapper);
+
+       return 0;
+}
+
 void spamassassin_save_config(void)
 {
        PrefFile *pfile;
@@ -262,7 +398,7 @@ void spamassassin_save_config(void)
                return;
 
        if (prefs_write_param(param, pfile->fp) < 0) {
-               g_warning("failed to write SpamAssassin configuration to file\n");
+               g_warning("Failed to write SpamAssassin configuration to file\n");
                prefs_file_close_revert(pfile);
                return;
        }
@@ -271,6 +407,22 @@ void spamassassin_save_config(void)
        prefs_file_close(pfile);
 }
 
+gboolean spamassassin_check_username(void)
+{
+       if (config.username == NULL || config.username[0] == '\0') {
+               config.username = (gchar*)g_get_user_name();
+               if (config.username == NULL) {
+                       if (hook_id != -1) {
+                               spamassassin_unregister_hook();
+                       }
+                       procmsg_unregister_spam_learner(spamassassin_learn);
+                       procmsg_spam_set_folder(NULL);
+                       return FALSE;
+               }
+       }
+       return TRUE;
+}
+
 void spamassassin_set_message_callback(MessageCallback callback)
 {
        message_callback = callback;
@@ -280,6 +432,8 @@ gint plugin_init(gchar **error)
 {
        gchar *rcpath;
 
+       hook_id = -1;
+
        if ((sylpheed_get_version() > VERSION_NUMERIC)) {
                *error = g_strdup("Your version of Sylpheed-Claws is newer than the version the SpamAssassin plugin was built with");
                return -1;
@@ -290,37 +444,46 @@ gint plugin_init(gchar **error)
                return -1;
        }
 
-       hook_id = hooks_register_hook(MAIL_FILTERING_HOOKLIST, mail_filtering_hook, NULL);
-       if (hook_id == -1) {
-               *error = g_strdup("Failed to register mail filtering hook");
-               return -1;
-       }
-
-       username = (gchar*)g_get_user_name();
-       if (username == NULL) {
-               hooks_unregister_hook(MAIL_FILTERING_HOOKLIST, hook_id);
-               *error = g_strdup("Failed to get username");
-               return -1;
-       }
-
        prefs_set_default(param);
        rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, COMMON_RC, NULL);
        prefs_read_config(param, "SpamAssassin", rcpath, NULL);
        g_free(rcpath);
+       if (!spamassassin_check_username()) {
+               *error = g_strdup("Failed to get username");
+               return -1;
+       }
        spamassassin_gtk_init();
-
+               
        debug_print("Spamassassin plugin loaded\n");
 
+       if (config.process_emails) {
+               spamassassin_register_hook();
+       }
+
+       if (!config.enable || config.transport == SPAMASSASSIN_DISABLED) {
+               log_error("Spamassassin plugin is loaded but disabled by its preferences.\n");
+       }
+       else {
+               if (config.transport == SPAMASSASSIN_TRANSPORT_TCP)
+                       debug_print("Enabling learner with a remote spamassassin server requires spamc/spamd 3.1.x\n");
+               procmsg_register_spam_learner(spamassassin_learn);
+               procmsg_spam_set_folder(config.save_folder);
+       }
+
        return 0;
        
 }
 
 void plugin_done(void)
 {
-       hooks_unregister_hook(MAIL_FILTERING_HOOKLIST, hook_id);
+       if (hook_id != -1) {
+               spamassassin_unregister_hook();
+       }
        g_free(config.hostname);
        g_free(config.save_folder);
-
+       spamassassin_gtk_done();
+       procmsg_unregister_spam_learner(spamassassin_learn);
+       procmsg_spam_set_folder(NULL);
        debug_print("Spamassassin plugin unloaded\n");
 }
 
@@ -331,17 +494,46 @@ const gchar *plugin_name(void)
 
 const gchar *plugin_desc(void)
 {
-       return _("This plugin checks all messages that are received from an "
+       return _("This plugin can check all messages that are received from an "
                 "IMAP, LOCAL or POP account for spam using a SpamAssassin "
                 "server. You will need a SpamAssassin Server (spamd) running "
                 "somewhere.\n"
                 "\n"
+                "It can also be used for marking messages as Ham or Spam.\n"
+                "\n"
                 "When a message is identified as spam it can be deleted or "
-                "saved into a special folder.\n"
-                "\n");
+                "saved in a specially designated folder.\n"
+                "\n"
+                "Options can be found in /Configuration/Preferences/Plugins/SpamAssassin");
 }
 
 const gchar *plugin_type(void)
 {
        return "GTK2";
 }
+
+const gchar *plugin_licence(void)
+{
+       return "GPL";
+}
+
+const gchar *plugin_version(void)
+{
+       return VERSION;
+}
+
+void spamassassin_register_hook(void)
+{
+       hook_id = hooks_register_hook(MAIL_FILTERING_HOOKLIST, mail_filtering_hook, NULL);
+       if (hook_id == -1) {
+               g_warning("Failed to register mail filtering hook");
+               config.process_emails = FALSE;
+       }
+}
+
+void spamassassin_unregister_hook(void)
+{
+       if (hook_id != -1) {
+               hooks_unregister_hook(MAIL_FILTERING_HOOKLIST, hook_id);
+       }
+}