git.roojs.org Git - app.mailtrimmer/blob - src/strip.vala

   1 /**
   2
   3   needs to scan 2 things
   4   a) our mailfort email database
   5        point it at the top directory, containing YEAR/MONTH/DAY.... directories.
   6        scan each file (over a year old...)
   7        extract out the attachment, and replace with HTML
   8        DATABASE? - mysql or sqlite? -
   9            filesize / name / date / checksum / mimetype -- into mailfort should be OK.
  10   b) the imap user emails
  11            loop through user's directories
  12            check age of email .. over 1 years..
  13            ?? how to prevent 'repeat' scanning of emails?
  14               ??? hidden '.' files containing last scan date?
  15
  16            check if file exists in our DB.. - replace the link...
  17            otherwise generate a file. + add to DB...
  18
  19    c) retreival system
  20      -> URL -> get file
  21    d) redirect system.
  22      -> URL -> redirect to correct server
  23
  24
  25 More notes on our Mailfort DB sync:
  26 * some of these attachments are already in the database...
  27  - so we need to update the DB..
  28  - probably worth putting the code in a stored procedure..
  29
  30  -- key scenarios
  31    * first scan (and extract)
  32    * rescan (as I messed up the first time - fix the DB...)
  33    * email scan - attachments might not have related messages.
  34
  35
  36  - {id} attachment_init(
  37                 {exim_msg_id}
  38                 {chksum}
  39                 {filename),
  40         )
  41         // creates or returns id (can look for existing messages?
  42         // can do a merge?? - copy 'old' record data into 'new'....  "prefer checksummed"
  43
  44         attachment_update(
  45                 {id}
  46                 {exim_msg_id}
  47                 {mailfort_msg_sig}
  48                 {file_size}
  49                 {created} // message date..
  50                 {chksum}
  51                 {filename),
  52         {mime_type}
  53         )
  54         attachment_update_store(
  55                         {id}
  56                         {stored_filename}
  57         )
  58
  59
  60 */
  61
  62 // valac --pkg gmime --vapi
  63 /*
  64
  65 // http://www.fromdual.com/mysql-vala-program-example << check mysql if this does not work.
  66
  67  valac  -g --vapidir=. --thread  strip.vala   --vapidir=../vapi \
  68      --pkg glib-2.0 --pkg mysql --pkg gio-2.0 --pkg posix --pkg gmime-2.6 \
  69       --Xcc=-lmysqlclient  -v \
  70        -o /tmp/strip
  71 */
  72
  73 public class StripApplication : GLib.Application {
  74
  75         public static string? opt_path = null;
  76         public static string? opt_file = null;
  77         public static string? opt_target_path = null;
  78         public static string? opt_db_host = "127.0.0.1";
  79         public static string? opt_db_name = null;
  80         public static string? opt_db_user = null;
  81         public static string? opt_db_pass = null;
  82
  83         public static int    opt_limit = -1;
  84
  85         public static bool      opt_is_extracting = false;
  86         public static bool      opt_is_replacing = false;
  87         public static bool      opt_scan_imap  = false;
  88         public static bool      opt_scan_mailfort  = false;
  89         public static bool              opt_dump = false;
  90         public static bool              opt_debug = false;
  91
  92         public static bool opt_debug_sql = false;
  93         public static string? opt_replace_link = null;
  94
  95
  96         public const GLib.OptionEntry[] options = {
  97
  98                 { "debug", 0, 0, OptionArg.NONE, ref opt_debug, "show debug messages for components", null },
  99                 { "debug-sql", 0, 0, OptionArg.NONE, ref opt_debug_sql, "debug the SQL statements", null },
 100
 101                 { "path", 0, 0, OptionArg.STRING, ref opt_path, "Directory where email to be parsed is", null },
 102                 { "file", 0, 0, OptionArg.STRING, ref opt_file, "A specific file to be parsed", null },
 103
 104                 { "target-path", 0, 0, OptionArg.STRING, ref opt_target_path, "Directory where attachments are to be put", null },
 105
 106                 { "link", 0, 0, OptionArg.STRING, ref opt_replace_link, "url for the replement link: eg. http://www.mysite.com/xxxx/%s", null },
 107
 108                 { "host", 0, 0, OptionArg.STRING, ref opt_db_host, "Mysql host (default localhost)", null },
 109                 { "name", 0, 0, OptionArg.STRING, ref opt_db_name, "Mysql database name REQUIRED", null },
 110                 { "user", 0, 0, OptionArg.STRING, ref opt_db_user, "Mysql database user REQUIRED", null },
 111                 { "pass", 0, 0, OptionArg.STRING, ref opt_db_pass, "Mysql database password (default empty)", null },
 112
 113                 { "extract", 0, 0, OptionArg.NONE, ref opt_is_extracting, "Should attachments be extracted (default NO)", null },
 114                 { "replace", 0, 0, OptionArg.NONE, ref opt_is_replacing, "Should attachments be replaced (default NO)", null },
 115                 { "dump", 0, 0, OptionArg.NONE, ref opt_dump, "Print the replaced mail contents to stdout", null },
 116
 117                 { "limit", 0, 0, OptionArg.INT, ref opt_limit, "stop after X number of messages with attachments have been processed", null },
 118
 119                 { "scan-imap", 0, 0, OptionArg.NONE, ref opt_scan_imap, "scan an imap tree", null },
 120                 { "scan-mailfort", 0, 0, OptionArg.NONE, ref opt_scan_mailfort, "scan a mailfort tree", null },
 121                 { null }
 122         };
 123     public StripApplication( string[] args )
 124     {
 125                  Object(
 126             application_id: "org.roojs.mailstripper",
 127             flags: ApplicationFlags.FLAGS_NONE
 128          );
 129
 130
 131          var opt_context =  new GLib.OptionContext ("Mail Stripper");
 132
 133          try {
 134
 135             opt_context.set_help_enabled (true);
 136             opt_context.add_main_entries (options, null);
 137             opt_context.parse ( ref  args);
 138             //opt_detach = !optx_no_detach;
 139
 140
 141
 142              // options that have to be set.. bee or hive... (or stop all)
 143             if ((!opt_scan_mailfort && !opt_scan_imap) || (opt_scan_mailfort && opt_scan_imap))  {
 144                stdout.printf ("You must specify the type of directory tree to scan - either imap or mailfort\n%s",
 145                    opt_context.get_help(true, null));
 146                GLib.Process.exit(Posix.EXIT_FAILURE);
 147             }
 148
 149                          if ((opt_db_name == null || opt_db_name.length < 1 || opt_db_user == null || opt_db_user.length < 1))  {
 150                stdout.printf ("You must specify the database name / user \n%s",
 151                    opt_context.get_help(true, null));
 152                GLib.Process.exit(Posix.EXIT_FAILURE);
 153             }
 154                          if ((opt_path == null || opt_path.length < 1)   )  {
 155                stdout.printf ("You must specify the scan start path\n%s",
 156                    opt_context.get_help(true, null));
 157                GLib.Process.exit(Posix.EXIT_FAILURE);
 158             }
 159                         if (opt_replace_link == null || (opt_replace_link.length < 1))  {
 160                stdout.printf ("You must specify the link to use in the replacement \n%s",
 161                    opt_context.get_help(true, null));
 162                GLib.Process.exit(Posix.EXIT_FAILURE);
 163             }
 164             if ((opt_is_replacing || opt_is_extracting ) && (opt_target_path == null || opt_target_path.length < 1)) {
 165                       stdout.printf ("You must specify a target path to put attachments\n%s",
 166                    opt_context.get_help(true, null));
 167                GLib.Process.exit(Posix.EXIT_FAILURE);
 168             }
 169
 170
 171          } catch (GLib.OptionError e) {
 172             stdout.printf ("error: %s\n", e.message);
 173             stdout.printf ("Run '%s --help' to see a full list of available command line options.\n%s",
 174                       args[0], opt_context.get_help(true, null));
 175             GLib.Process.exit(Posix.EXIT_FAILURE);
 176          }
 177         }
 178
 179     public static int main(string[] args)
 180     {
 181
 182                 var application = new StripApplication(  args);
 183
 184                 GLib.Log.set_always_fatal(LogLevelFlags.LEVEL_ERROR | LogLevelFlags.LEVEL_CRITICAL);
 185
 186            if (opt_debug || opt_debug_sql) {
 187                         GLib.Log.set_handler(null,
 188                         GLib.LogLevelFlags.LEVEL_DEBUG | GLib.LogLevelFlags.LEVEL_WARNING | GLib.LogLevelFlags.LEVEL_INFO,
 189                         (dom, lvl, msg) => {
 190                                         print("%s\n", msg);
 191                                 }
 192                         );
 193                 }
 194
 195         GMime.init(0);
 196                 if (StripApplication.opt_is_replacing) {
 197                         StripApplication.opt_is_extracting = true;
 198                 }
 199
 200                 GLib.debug("scanning folder: %s", opt_path );
 201
 202                 var strip = new Strip( opt_path );
 203
 204
 205                 strip.mysql  = new Mysql.Database();
 206                 if (!strip.mysql.real_connect(
 207                                 opt_db_host,
 208                                 opt_db_user ,
 209                                 opt_db_pass == null ? "" : opt_db_pass, //passwd
 210                                 opt_db_name, //DB
 211                                 3306, // not changable...?
 212                                 null
 213                         )
 214                 ) {
 215                         stdout.printf("ERROR %u: Connection failed: %s\n",
 216                                 strip.mysql.errno(), strip.mysql.error()
 217                         );
 218                         return 1;
 219                 }
 220         if (opt_file != null) {
 221                 strip.base_dir = opt_path;
 222                 strip.scan_file( GLib.Path.get_dirname(opt_file),  GLib.Path.get_basename(opt_file));
 223                 return 0;
 224         }
 225
 226                 strip.scan_dir(opt_path);
 227
 228
 229
 230         return 0;
 231     }
 232 }
 233
 234 public class Strip : GLib.Object {
 235
 236
 237
 238         public string base_dir = "";
 239
 240         public Mysql.Database mysql;
 241
 242         int processed = 0;
 243
 244     uint64 used_space_before = 0;
 245     uint64 used_space_after = 0;
 246
 247
 248     public Strip(string base_dir)
 249     {
 250         this.base_dir = base_dir;
 251     }
 252
 253     public void handle_part(GMime.Object parent, GMime.Object mime_obj)
 254     {
 255                 if (mime_obj is GMime.Part) {
 256                    var  p = (GMime.Part)mime_obj;
 257                         var ct = p.get_content_type();
 258                         var cd = p.get_content_disposition();
 259
 260                         var sid = p.get_header("X-strip-id");
 261                     if (sid != null && sid.length > 0) {
 262                         this.update_attachment_db(p);
 263                             GLib.debug("Skip attachment replace - it's already been done");
 264                         return;
 265                         }
 266
 267                         if (cd == null || cd.get_disposition().down() != "attachment") {
 268                                 return;
 269                         }
 270                         if (ct.get_media_type() == "text") {
 271                                 return;
 272                         }
 273                         if (ct.to_string() == "application/pgp-encrypted") {
 274                                 return;
 275                         }
 276                         if (ct.to_string() == "application/pgp-keys") {
 277                                 return;
 278                         }
 279                         if (p.get_filename() == null) {
 280                                 return;
 281                         }
 282                          // print("got part %s\n", ct.to_string());
 283                          if (parent is GMime.Multipart) {
 284
 285                                 this.replace_attachment(((GMime.Multipart)parent), p);
 286                                 // remove it !?
 287
 288                           }
 289
 290
 291                         return;
 292                 }
 293                 if (mime_obj is GMime.Multipart) {
 294
 295
 296                         var  mp = (GMime.Multipart)mime_obj;
 297                         //var ct = mp.get_content_type();
 298
 299                         //print("got multi-part %s\n", ct.to_string());
 300                         for (var i = 0; i< mp.get_count(); i++) {
 301                           var mo = mp.get_part(i);
 302                           this.handle_part(mime_obj,mo);
 303                         }
 304                    // ((GMime.Multipart)mime_obj).foreach((sub_obj) => {
 305                    //     Strip.handle_part(sub_obj);
 306                 //
 307                    // });
 308
 309
 310                         return;
 311                 }
 312
 313                 if (mime_obj is GMime.MessagePart) {
 314                         var msg = ((GMime.MessagePart)mime_obj).get_message();
 315                         msg.foreach((subobj) => {
 316                          this.handle_part(msg,subobj);
 317                     });
 318
 319                         //print("got message-part\n");
 320                         return;
 321                 }
 322
 323                 if (mime_obj is GMime.Message) {
 324                         var mp = ((GMime.Message) mime_obj).get_mime_part();
 325
 326                         if (!(mp is GMime.Multipart)) {
 327                                 GLib.debug("get mimepart does not return a Multipart?");
 328                                 return;
 329                         }
 330
 331                         var mpc = ((GMime.Multipart)mp).get_count();
 332
 333                         //GLib.debug("Message has %d parts", mpc);
 334                         for (var i =0 ; i < mpc; i++) {
 335                                 //GLib.debug("Getting part %d", i);
 336                                 var submime_obj = ((GMime.Multipart)mp).get_part(i);
 337                         this.handle_part(mp,submime_obj);
 338                     }
 339                         print("got message??\n");
 340                         return;
 341                 }
 342
 343                 print("got something else\n");
 344
 345
 346     }
 347     public void update_attachment_db(GMime.Part attachment)
 348     {
 349         // only called when we have an sid...
 350         var sid = attachment.get_header("X-strip-id");
 351         if (sid == null || sid.length < 1) {
 352                 GLib.debug("Strange - update attachment db called ?");
 353                 return;
 354         }
 355
 356         // initialize it with known data..
 357         // that should wipe out dupes.
 358
 359         this.query("""
 360                 SELECT
 361
 362                 attachment_init(
 363                                 msgid,
 364                                 checksum,
 365                                 mime_filename,
 366                                 filesize
 367                         ) as id
 368                         FROM
 369                         attachment
 370                         WHERE
 371                         id = %d
 372
 373           """.printf(
 374                         int.parse(sid)
 375                 ));
 376         this.query("""
 377                 SELECT attachment_update(
 378                                 %d, -- in_id INT(11),
 379                                 '%s', -- in_mime_type varchar(255),
 380                                 %d, -- in_mime_size int(11),
 381                                 '%s', -- in_created DATETIME,
 382                                 '%s' -- in_mailfort_sig varchar(64)
 383
 384                     )""
 385
 386
 387               """.printf(
 388                         int.parse(sid),
 389                         "", // this will be ignored..
 390                         0, // this will be ingored..
 391                                 this.created_date,
 392                                 this.mysql_escape(this.active_message_x_mailfort_sig)
 393
 394               )
 395                 );
 396
 397
 398
 399     }
 400
 401
 402     public void replace_attachment(GMime.Multipart parent, GMime.Part attachment)
 403     {
 404         var sid = attachment.get_header("X-strip-id");
 405         if (sid != null && sid.length > 0) {
 406                 GLib.debug("Skip attachment replace - it's already been done");
 407                 return;
 408         }
 409
 410         var c = attachment.get_content_object();
 411
 412         var filename = attachment.get_filename().replace("/", "-");
 413         var fn = GLib.Environment.get_tmp_dir() +
 414                         "/"+ this.active_name + "."+   filename;
 415
 416             var outfile = new GMime.StreamFile.for_path(fn, "w");
 417             outfile.set_owner(true);
 418             var file_size = (int) c.write_to_stream(outfile);
 419             var chksum = this.md5_file(fn);
 420             outfile.flush();
 421             outfile = null;
 422
 423         if (file_size == 0) {
 424
 425                 GLib.debug("ERROR - file size of write to stream returned 0?");
 426                 Posix.unlink(fn);
 427                 return;
 428         }
 429
 430
 431
 432
 433         var mime_type= attachment.get_content_type().to_string();
 434         // at this point we have to do our database magic...
 435         //filesize / name / date / checksum / mimetype -- into mailfort should be OK.
 436
 437         this.query("""
 438                 SELECT
 439
 440                 attachment_init(
 441                                 '%s', -- in_msgid VARCHAR(32),
 442                                 '%s', -- in_checksum VARCHAR(64),
 443                                 '%s', -- in_mime_filename varchar(255)
 444                                 %d -- filesize
 445                         ) as id
 446
 447           """.printf(
 448                         this.mysql_escape(this.active_message_exim_id),
 449                         chksum,
 450                         this.mysql_escape( attachment.get_filename() ), // what is thsi is invalid?
 451                          file_size)
 452                 );
 453                 var file_id = "0";
 454         var rs = mysql.use_result();
 455
 456                 var row = rs.fetch_row();
 457
 458                 var target_fn = "";
 459
 460                 //var create_dir = this.created_dir;
 461
 462
 463                 if (rs == null  || rs.num_rows() < 1) {
 464                         GLib.debug("ERROR - CALL to attachment_init failed");
 465                 Posix.unlink(fn);
 466                 return;
 467
 468                 }
 469                 file_id =  row[0];
 470                 if (int.parse(file_id) < 1) {
 471                         GLib.debug("ERROR - CALL to attachment_init failed - returned 0?");
 472                 Posix.unlink(fn);
 473                 return;
 474
 475                 }
 476
 477
 478                 GLib.debug("fn = %s, m5=%s, id= %s", filename, mime_type, this.active_message_id);
 479                 this.query("""
 480
 481                         SELECT attachment_update(
 482                                 %d, -- in_id INT(11),
 483                                 '%s', -- in_mime_type varchar(255),
 484                                 '%s', -- in_created DATETIME,
 485                                 '%s', -- in_mailfort_sig varchar(64)
 486
 487                                 ) as result
 488       """.printf(
 489                 int.parse(file_id),
 490                         this.mysql_escape(mime_type),
 491                         this.created_date,
 492                         this.mysql_escape(this.active_message_x_mailfort_sig)
 493                 ));
 494
 495
 496
 497                 this.used_space_after += file_size;
 498
 499
 500
 501             if (StripApplication.opt_is_extracting) {
 502                         target_fn = StripApplication.opt_target_path + "/" + this.created_dir +"/"+ file_id  + "-" + filename;
 503                 }
 504
 505             var stored =  "/" + this.created_dir +"/"+ file_id  + "-" + filename;
 506                  this.query("""
 507
 508                         SELECT attachment_update_store(
 509                                 %d, -- in_id INT(11),
 510                                 '%s'  -- in_store_filename varchar(255),
 511
 512
 513                                 ) as result
 514       """.printf(
 515                 int.parse(file_id),
 516                          this.mysql_escape( stored)
 517                 ));
 518
 519
 520         var rep = new GMime.Part.with_type("text","html");
 521         // we have to set up a redirect server - to redirect hpasite... to their internal service..
 522         rep.set_filename(filename);
 523         string txt = "<html><body>"+
 524             "<a href=\"" + StripApplication.opt_replace_link + "/" +
 525                         file_id + "/" + this.created_dir + "/"+chksum+"/"+ GLib.Uri.escape_string( filename) +"\">" +
 526             GLib.Uri.escape_string( filename) + // fixme needs html escaping...
 527             "</a>" +
 528             "</body></html>";
 529
 530         rep.get_content_type().set_parameter("charset", "utf-8");
 531                 rep.set_header("X-strip-id", file_id);
 532                 rep.set_header("X-strip-content-name",  filename);
 533                 rep.set_header("X-strip-path", this.created_dir + "/" + file_id + "-" + filename);
 534                 rep.set_header("X-strip-content-type", mime_type);
 535         var stream =  new GMime.StreamMem.with_buffer(txt.data);
 536         var con = new GMime.DataWrapper.with_stream(stream,GMime.ContentEncoding.DEFAULT);
 537
 538         rep.set_content_object(con);
 539         GLib.debug("Replacing Attachment with HTML");
 540         parent.replace(parent.index_of(attachment), rep);
 541                 this.has_replaced = true;
 542
 543                 if (StripApplication.opt_is_extracting && target_fn.length > 0) {
 544                         var dir = GLib.Path.get_dirname(target_fn);
 545                         if (!FileUtils.test (dir, FileTest.IS_DIR)) {
 546                                 GLib.DirUtils.create_with_parents(dir, 0755);
 547                         }
 548                         GLib.debug("Creating file %s", target_fn);
 549                         if (!FileUtils.test (target_fn, FileTest.EXISTS)) {
 550                                 Posix.link(fn, target_fn);
 551                         }
 552                 } else {
 553                         GLib.debug("Skipping extraction %s", target_fn);
 554                 }
 555                 Posix.unlink(fn);
 556
 557
 558
 559     }
 560
 561     public int query(string str)
 562     {
 563         if (StripApplication.opt_debug_sql) {
 564                 GLib.debug("SQL: %s\n", str);
 565                 }
 566
 567         var rc=  this.mysql.query(str);
 568         if ( rc != 0 ) {
 569
 570                     GLib.debug("ERROR %u: Query failed: %s\n", this.mysql.errno(), this.mysql.error());
 571                 }
 572                 return rc;
 573         }
 574
 575     public string mysql_escape(string str)
 576     {
 577             unichar[] value_escaped = new unichar[str.length * 2 + 1];
 578                 this.mysql.real_escape_string ((string) value_escaped, str, str.length);
 579                 return (string) value_escaped;
 580     }
 581
 582     public string  md5_file(string fn) {
 583               Checksum checksum = new Checksum (ChecksumType.MD5);
 584
 585               FileStream stream = FileStream.open (fn, "rb");
 586               uint8 fbuf[100];
 587               size_t size;
 588
 589               while ((size = stream.read (fbuf)) > 0) {
 590                       checksum.update (fbuf, size);
 591               }
 592
 593               unowned string digest = checksum.get_string ();
 594               return digest;
 595     }
 596
 597         string active_path = "";
 598     string active_name = "";
 599     string active_message_id = "";
 600     string active_message_x_mailfort_sig = "";
 601     string active_message_exim_id = "";
 602     bool has_replaced = false;
 603     string created_date = ""; // should be YYYY-mm-dd
 604     string created_dir = ""; // should be YYY/mm/dd
 605
 606     public void scan_file(string path, string name)
 607     {
 608                 GLib.debug("Scan: %s/%s", path,name);
 609
 610                 this.has_replaced = false;
 611         this.active_path = path;
 612         this.active_name = name;
 613         this.active_message_id = "";
 614
 615         this.created_dir = this.active_path.substring(this.base_dir.length + 1 );
 616                 this.created_date = this.created_dir.replace("/", "-");
 617
 618         var file_size = (int) File.new_for_path(path +"/" + name)
 619                                         .query_info(GLib.FileAttribute.STANDARD_SIZE,GLib.FileQueryInfoFlags.NONE,null)
 620                                         .get_size();
 621
 622         this.used_space_before += file_size;
 623
 624         var stream = new GMime.StreamFs.for_path (path +"/" + name,Posix.O_RDONLY, 0);
 625         //stream.set_owner(true);
 626         var parser = new GMime.Parser.with_stream(stream);
 627         var message = parser.construct_message();
 628
 629                 if (message == null) {
 630                         GLib.debug("Could not parse file? %s/%s", path,name);
 631                 this.used_space_after += file_size;
 632                 return;
 633                 }
 634
 635
 636                 // check : - is message over a year old?
 637                 // get various msg info..
 638                 this.active_message_id = message.get_message_id();
 639                 this.active_message_x_mailfort_sig = message.get_header("x-mailfort-sig");
 640                 var recvd = message.get_header("received");
 641                 this.active_message_exim_id = "";
 642                 if (recvd != null && recvd.length > 1) {
 643                         GLib.debug("RECV: %s", recvd);
 644                         var lines = recvd.split("\t");
 645                         for (var i = 0; i < lines.length;i++) {
 646                                 var bits = lines[i].strip().split(" ");
 647                                 if (bits[0] == "id") {
 648                                         this.active_message_exim_id = bits[1];
 649                                 }
 650                         }
 651                 }
 652                 GLib.debug("Message DATA:\n mid: %s\nmailfort: %s \nexim_id: %s",
 653                         this.active_message_id,
 654                         this.active_message_x_mailfort_sig,
 655                         this.active_message_exim_id
 656                 );
 657
 658
 659                 // DATE?
 660
 661                 var mp = message.get_mime_part();
 662
 663                 if (!(mp is GMime.Multipart)) {
 664                         GLib.debug("get mimepart does not return a Multipart?");
 665                 this.used_space_after += file_size;
 666                         return;
 667                 }
 668
 669                 var mpc = ((GMime.Multipart)mp).get_count();
 670
 671                 //GLib.debug("Message has %d parts", mpc);
 672                 for (var i =0 ; i < mpc; i++) {
 673                         //GLib.debug("Getting part %d", i);
 674                         var mime_obj = ((GMime.Multipart)mp).get_part(i);
 675             this.handle_part(mp,mime_obj);
 676         }
 677
 678         parser= null;
 679
 680       //  stream.set_owner(false);
 681             //stream.close();
 682         stream = null;//.close();
 683
 684
 685                 if (!this.has_replaced) {
 686                         this.used_space_after += file_size;
 687                         GLib.debug("skpping write file - no replacement occured");
 688                         return;
 689                 }
 690                 string tmpfile = "";
 691                 GMime.Stream outstream = new GMime.StreamNull();
 692                 if (StripApplication.opt_is_replacing) {
 693
 694                         tmpfile = GLib.Environment.get_tmp_dir() +"/" + name;
 695                 outstream = new GMime.StreamFile.for_path (tmpfile,"w");
 696                 ((GMime.StreamFile)outstream).set_owner(true);
 697         }
 698                 if (StripApplication.opt_dump) {
 699                         outstream = new GMime.StreamMem();
 700         }
 701
 702         file_size = (int) message.write_to_stream(outstream);
 703         if (StripApplication.opt_is_replacing) {
 704                 ((GMime.StreamFile)outstream).set_owner(false);
 705         }
 706                 if (StripApplication.opt_dump) {
 707                         var ua = ((GMime.StreamMem)outstream).get_byte_array().data;
 708                         print("%s\n", (string) ua);
 709                 }
 710         message = null;
 711         outstream.flush();
 712         outstream.close();
 713         GLib.debug("finished writing output %d", file_size);
 714
 715         //
 716
 717
 718         this.used_space_after += file_size;
 719
 720
 721         if (StripApplication.opt_is_replacing) {
 722                 Posix.unlink(path +"/" + name);
 723                 GLib.debug("copy tmp file %s to %s" , tmpfile, path +"/" + name);
 724                 Posix.link(tmpfile, path +"/" + name);
 725                 Posix.unlink(tmpfile);
 726                 }
 727         this.processed++;
 728
 729         if (StripApplication.opt_limit > -1 && this.processed >= StripApplication.opt_limit) {
 730                 GLib.debug("Reached replacement limit");
 731                 Posix.exit(1);
 732         }
 733
 734
 735
 736
 737     }
 738
 739
 740     public void scan_dir(string path)
 741     {
 742         var f = File.new_for_path(path);
 743                 FileEnumerator file_enum;
 744         var cancellable = new Cancellable ();
 745         try {
 746             file_enum = f.enumerate_children(
 747                 FileAttribute.STANDARD_DISPLAY_NAME + "," +   FileAttribute.STANDARD_TYPE,
 748                         FileQueryInfoFlags.NOFOLLOW_SYMLINKS,  // FileQueryInfoFlags.NONE,
 749                         cancellable
 750                 );
 751         } catch (Error e) {
 752                 GLib.debug("Got error scanning dir? %s", e.message);
 753             // FIXME - show error..
 754             return;
 755         }
 756         FileInfo next_file;
 757
 758         while (cancellable.is_cancelled () == false ) {
 759             try {
 760                 next_file = file_enum.next_file (cancellable);
 761             } catch(Error e) {
 762                 GLib.debug("error getting next file? %s", e.message);
 763                 break;
 764             }
 765
 766             if (next_file == null) {
 767                 break;
 768             }
 769
 770
 771             if (next_file.get_file_type() != FileType.DIRECTORY) {
 772
 773                 if (next_file.get_display_name()[0] == ',') {
 774                         continue;
 775                 }
 776
 777                 this.scan_file(path , next_file.get_display_name());
 778                 this.report_state("After scanning %s/%s".printf(path , next_file.get_display_name()));
 779                 continue;
 780             }
 781
 782
 783             //stdout.printf("Monitor.monitor: got file %s : type :%u\n",
 784             //        next_file.get_display_name(), next_file.get_file_type());
 785
 786
 787             if (next_file.get_is_symlink()) {
 788                 next_file = null;
 789                 continue;
 790             }
 791
 792             var ds = next_file.get_display_name();
 793             if (ds[0] == '.') {
 794                 next_file = null;
 795                 continue;
 796             }
 797             if (ds == "attachments") {
 798                         continue;
 799                 }
 800
 801
 802             var sp = path+"/"+next_file.get_display_name();
 803             // skip modules.
 804             //print("got a file : " + sp);
 805
 806             next_file = null;
 807
 808
 809             this.scan_dir(sp);
 810
 811         }
 812
 813
 814     }
 815     void report_state(string msg)
 816     {
 817         // Saved: 2G  Original 10G : 20%
 818         GLib.debug("Saved : %s (%.1f%%) | Original %s | %s",
 819                         GLib.format_size(this.used_space_before - this.used_space_after),
 820                         100f * ((1f * (this.used_space_before - this.used_space_after)) / (this.used_space_before * 1f)),
 821                         GLib.format_size(this.used_space_before),
 822                         msg
 823                 );
 824
 825         }
 826
 827
 828
 829 }