src/downloader.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * downloader.cpp: Downloader class.
   4  *
   5  * The downloader implements two modes of operation:
   6  *
   7  *    bare bones:  this is the interface expected by Javascript and C#
   8  *               this is the default if the caller does not call
   9  *               Downloader::SetWriteFunc
  10  *
  11  *    progressive: this interface is used internally by the Image
  12  *               class to do progressive loading.   If you want to
  13  *               use this mode, you must call the SetWriteFunc routine
  14  *               to install your callbacks before starting the download.
  15  *
  16  * TODO:
  17  *    Need a mechanism to notify the managed client of errors during
  18  *    download.
  19  *
  20  *    Need to provide the buffer we downloaded to GetResponseText(string PartName)
  21  *    so we can return the response text for the given part name.
  22  *
  23  *    The providers should store the files *somewhere* and should be able
  24  *    to respond to the "GetResponsetext" above on demand.   The current
  25  *    code in demo.cpp and ManagedDownloader are not complete in this regard as
  26  *    they only stream
  27  *
  28  * Contact:
  29  *   Moonlight List (moonlight-list@lists.ximian.com)
  30  *
  31  * Copyright 2007 Novell, Inc. (http://www.novell.com)
  32  *
  33  * See the LICENSE file included with the distribution for details.
  34  *
  35  */
  36
  37
  38 #include <config.h>
  39
  40 #include <sys/types.h>
  41 #include <sys/stat.h>
  42 #include <unistd.h>
  43 #include <fcntl.h>
  44
  45 #include "downloader.h"
  46 #include "file-downloader.h"
  47 #include "mms-downloader.h"
  48 #include "runtime.h"
  49 #include "utils.h"
  50 #include "error.h"
  51 #include "debug.h"
  52 #include "uri.h"
  53 #include "deployment.h"
  54
  55 //
  56 // Downloader
  57 //
  58
  59 Downloader::Downloader ()
  60         : DependencyObject (Type::DOWNLOADER)
  61 {
  62         LOG_DOWNLOADER ("Downloader::Downloader ()\n");
  63
  64         downloader_state = Downloader::create_state (this);
  65         user_data = NULL;
  66         context = NULL;
  67         notify_size = NULL;
  68         writer = NULL;
  69         internal_dl = NULL;
  70
  71         send_queued = false;
  72         started = false;
  73         aborted = false;
  74         completed = false;
  75         custom_header_support = false;
  76         disable_cache = false;
  77         file_size = -2;
  78         total = 0;
  79
  80         filename = NULL;
  81         buffer = NULL;
  82         failed_msg = NULL;
  83 }
  84
  85
  86 Downloader::~Downloader ()
  87 {
  88         LOG_DOWNLOADER ("Downloader::~Downloader ()\n");
  89
  90         Downloader::destroy_state (downloader_state);
  91
  92         g_free (filename);
  93         g_free (buffer);
  94         g_free (failed_msg);
  95
  96         // NOTE:
  97         // mms code relies on the internal downloader to be alive while it has a ref on the downloader
  98         // update mms code if this assumption changes.
  99         if (internal_dl != NULL)
 100                 internal_dl->unref ();
 101 }
 102
 103 void
 104 Downloader::InternalAbort ()
 105 {
 106         LOG_DOWNLOADER ("Downloader::InternalAbort ()\n");
 107         if (!GetSurface ())
 108                 return;
 109
 110         abort_func (downloader_state);
 111 }
 112
 113 void
 114 Downloader::Abort ()
 115 {
 116         LOG_DOWNLOADER ("Downloader::Abort ()\n");
 117
 118         SetCurrentDeployment ();
 119
 120         if (!aborted && !failed_msg) {
 121                 InternalAbort ();
 122                 SetDownloadProgress (0.0);
 123                 send_queued = false;
 124                 aborted = true;
 125         }
 126 }
 127
 128 char *
 129 Downloader::GetDownloadedFilename (const char *partname)
 130 {
 131         LOG_DOWNLOADER ("Downloader::GetDownloadedFilename (%s)\n", filename);
 132
 133         g_return_val_if_fail (internal_dl != NULL && internal_dl->Is (Type::FILEDOWNLOADER), NULL);
 134
 135         // This is a horrible hack to work around mozilla bug #444160
 136         // Basically if a very small file is downloaded (<64KB in mozilla as of Jan5/09
 137         // it can be inserted into a shared cache map, and served up to us without ever
 138         // giving us the filename for a NP_ASFILE request.
 139         if (buffer != NULL) {
 140                 FileDownloader *fdl = (FileDownloader *) internal_dl;
 141                 char *tmpfile;
 142                 int fd;
 143
 144                 tmpfile = g_build_filename (g_get_tmp_dir (), "mozilla-workaround-XXXXXX", NULL);
 145                 if ((fd = g_mkstemp (tmpfile)) == -1) {
 146                         g_free (tmpfile);
 147                         return NULL;
 148                 }
 149
 150                 if (write_all (fd, buffer, (size_t) total) == -1) {
 151                         unlink (tmpfile);
 152                         g_free (tmpfile);
 153                         close (fd);
 154                         return NULL;
 155                 }
 156
 157                 close (fd);
 158
 159                 fdl->SetFilename (tmpfile);
 160                 fdl->SetUnlink (true);
 161                 g_free (tmpfile);
 162                 g_free (buffer);
 163                 buffer = NULL;
 164         }
 165
 166         return internal_dl->GetDownloadedFilename (partname);
 167 }
 168
 169 char *
 170 Downloader::GetResponseText (const char *PartName, gint64 *size)
 171 {
 172         LOG_DOWNLOADER ("Downloader::GetResponseText (%s, %p)\n", PartName, size);
 173
 174         // This is a horrible hack to work around mozilla bug #444160
 175         // Basically if a very small file is downloaded (<64KB in mozilla as of Jan5/09
 176         // it can be inserted into a shared cache map, and served up to us without ever
 177         // giving us the filename for a NP_ASFILE request.
 178         if (PartName == NULL && buffer != NULL) {
 179                 char *data;
 180                 char b[4096];
 181                 ssize_t nread;
 182                 GByteArray *buf;
 183
 184                 TextStream *stream = new TextStream ();
 185
 186                 if (!stream->OpenBuffer (buffer, total)) {
 187                         delete stream;
 188                         return NULL;
 189                 }
 190
 191                 buf = g_byte_array_new ();
 192                 while ((nread = stream->Read (b, sizeof (b))) > 0)
 193                         g_byte_array_append (buf, (const guint8 *) b, nread);
 194
 195                 *size = buf->len;
 196
 197                 g_byte_array_append (buf, (const guint8 *) "", 1);
 198                 data = (char *) buf->data;
 199
 200                 g_byte_array_free (buf, false);
 201                 delete stream;
 202
 203                 return data;
 204         }
 205
 206         return internal_dl->GetResponseText (PartName, size);
 207 }
 208
 209 void
 210 Downloader::InternalOpen (const char *verb, const char *uri)
 211 {
 212         LOG_DOWNLOADER ("Downloader::InternalOpen (%s, %s) requires custom header support: %i\n", verb, uri, custom_header_support);
 213
 214         open_func (downloader_state, verb, uri, custom_header_support, disable_cache);
 215 }
 216
 217 static bool
 218 same_scheme (const Uri *uri1, const Uri *uri2)
 219 {
 220         return uri1->GetScheme () && uri2->GetScheme () &&
 221                 !strcmp (uri1->GetScheme (), uri2->GetScheme ());
 222 }
 223
 224 static bool
 225 same_domain (const Uri *uri1, const Uri *uri2)
 226 {
 227         const char *host1 = uri1->GetHost ();
 228         const char *host2 = uri2->GetHost ();
 229
 230         if (host1 && host2)
 231                 return g_ascii_strcasecmp (host1, host2) == 0;
 232
 233         if (!host1 && !host2)
 234                 return true;
 235
 236         return false;
 237 }
 238
 239 // Reference:   URL Access Restrictions in Silverlight 2
 240 //              http://msdn.microsoft.com/en-us/library/cc189008(VS.95).aspx
 241 bool
 242 Downloader::CheckRedirectionPolicy (const char *url)
 243 {
 244         if (!url)
 245                 return false;
 246
 247         // the original URI
 248         Uri *source = GetUri ();
 249         if (Uri::IsNullOrEmpty (source))
 250                 return false;
 251
 252         // if the (original) source is relative then the (final) 'url' will be the absolute version of the uri
 253         // or if the source scheme is "file" then no server is present for redirecting the url somewhere else
 254         if (!source->IsAbsolute () || source->IsScheme ("file"))
 255                 return true;
 256
 257         char *strsrc = source->ToString ();
 258         // if the original URI and the end URI are identical then there was no redirection involved
 259         bool retval = (g_ascii_strcasecmp (strsrc, url) == 0);
 260         g_free (strsrc);
 261         if (retval)
 262                 return true;
 263
 264         // the destination URI
 265         Uri *dest = new Uri ();
 266         if (dest->Parse (url)) {
 267                 // there was a redirection, but is it allowed ?
 268                 switch (access_policy) {
 269                 case DownloaderPolicy:
 270                         // Redirection allowed for 'same domain' and 'same scheme'
 271                         // note: if 'dest' is relative then it's the same scheme and site
 272                         if (!dest->IsAbsolute () || (same_domain (source, dest) && same_scheme (source, dest)))
 273                                 retval = true;
 274                         break;
 275                 case MediaPolicy:
 276                         // Redirection allowed for: 'same scheme' and 'same or different sites'
 277                         // note: if 'dest' is relative then it's the same scheme and site
 278                         if (!dest->IsAbsolute () || same_scheme (source, dest))
 279                                 retval = true;
 280                         break;
 281                 case XamlPolicy:
 282                 case FontPolicy:
 283                 case MsiPolicy:
 284                 case StreamingPolicy:
 285                         // Redirection NOT allowed
 286                         break;
 287                 default:
 288                         // no policy (e.g. downloading codec EULA and binary) is allowed
 289                         retval = true;
 290                         break;
 291                 }
 292         }
 293
 294         delete dest;
 295
 296         return retval;
 297 }
 298
 299 // Reference:   URL Access Restrictions in Silverlight 2
 300 //              http://msdn.microsoft.com/en-us/library/cc189008(VS.95).aspx
 301 static bool
 302 validate_policy (const char *location, const Uri *source, DownloaderAccessPolicy policy)
 303 {
 304         if (!location || !source)
 305                 return true;
 306
 307         if (!source->IsAbsolute ()) {
 308                 //relative uri, not checking policy
 309                 return true;
 310         }
 311
 312         Uri *target = new Uri ();
 313         if (!target->Parse (location)) {
 314                 delete target;
 315                 return false;
 316         }
 317
 318         bool retval = true;
 319         switch (policy) {
 320         case DownloaderPolicy:
 321                 //Allowed schemes: http, https
 322                 if (!target->IsScheme ("http") && !target->IsScheme ("https"))
 323                         retval = false;
 324                 //X-Scheme: no
 325                 if (!same_scheme (target, source))
 326                         retval = false;
 327                 //X-Domain: requires policy file
 328                 // FIXME only managed is implemented
 329                 if (!same_domain (target, source))
 330                         retval = false;
 331                 break;
 332         case MsiPolicy:
 333         case MediaPolicy: //Media, images, ASX
 334                 //Allowed schemes: http, https, file
 335                 if (!target->IsScheme ("http") && !target->IsScheme ("https") && !target->IsScheme ("file"))
 336                         retval = false;
 337                 //X-Scheme: no
 338                 if (!same_scheme (target, source))
 339                         retval = false;
 340                 //X-Domain: Allowed
 341                 break;
 342         case XamlPolicy:
 343                 //Allowed schemes: http, https, file
 344                 if (!target->IsScheme ("http") && !target->IsScheme ("https") && !target->IsScheme ("file"))
 345                         retval = false;
 346                 //X-Scheme: no
 347                 if (!same_scheme (target, source))
 348                         retval =false;
 349                 //X-domain: allowed if not HTTPS to HTTPS
 350                 if (!same_domain (target, source) && target->IsScheme ("https") && source->IsScheme ("https"))
 351                         retval = false;
 352                 break;
 353         case FontPolicy:
 354                 //Allowed schemes: http, https, file
 355                 if (!target->IsScheme ("http") && !target->IsScheme ("https") && !target->IsScheme ("file"))
 356                         retval = false;
 357                 //X-Scheme: no
 358                 if (!same_scheme (target, source))
 359                         retval = false;
 360                 //X-domain: no
 361                 if (!same_domain (target, source))
 362                         retval = false;
 363                 break;
 364         case StreamingPolicy: //Streaming media
 365                 //Allowed schemes: http
 366                 if (!target->IsScheme ("http"))
 367                         retval = false;
 368                 //X-scheme: Not from https
 369                 if (source->IsScheme ("https") && !same_scheme (source, target))
 370                         retval = false;
 371                 //X-domain: allowed if not HTTPS to HTTPS
 372                 if (!same_domain (target, source) && target->IsScheme ("https") && source->IsScheme ("https"))
 373                         retval = false;
 374                 break;
 375         default:
 376                 break;
 377         }
 378
 379         delete target;
 380
 381         return retval;
 382 }
 383
 384 void
 385 Downloader::OpenInitialize ()
 386 {
 387         send_queued = false;
 388         started = false;
 389         aborted = false;
 390         completed = false;
 391         file_size = -2;
 392         total = 0;
 393
 394         g_free (failed_msg);
 395         g_free (filename);
 396         g_free (buffer);
 397         failed_msg = NULL;
 398         filename = NULL;
 399         buffer = NULL;
 400 }
 401
 402 void
 403 Downloader::Open (const char *verb, const char *uri, DownloaderAccessPolicy policy)
 404 {
 405         LOG_DOWNLOADER ("Downloader::Open (%s, %s)\n", verb, uri);
 406
 407         OpenInitialize ();
 408
 409         Uri *url = new Uri ();
 410         if (url->Parse (uri))
 411                 Open (verb, url, policy);
 412
 413         delete url;
 414 }
 415
 416 bool
 417 Downloader::ValidateDownloadPolicy (const char *source_location, Uri *uri, DownloaderAccessPolicy policy)
 418 {
 419         Uri *src_uri = NULL;
 420         bool valid;
 421
 422         if (!uri->isAbsolute && source_location) {
 423                 src_uri = new Uri ();
 424                 if (!src_uri->Parse (source_location, true)) {
 425                         delete src_uri;
 426                         return false;
 427                 }
 428
 429                 src_uri->Combine (uri);
 430                 uri = src_uri;
 431         }
 432
 433         valid = validate_policy (source_location, uri, policy);
 434         delete src_uri;
 435
 436         return valid;
 437 }
 438
 439 void
 440 Downloader::Open (const char *verb, Uri *uri, DownloaderAccessPolicy policy)
 441 {
 442         const char *source_location;
 443         Uri *src_uri = NULL;
 444         Uri *url = uri;
 445         char *str;
 446
 447         LOG_DOWNLOADER ("Downloader::Open (%s, %p)\n", verb, uri);
 448
 449         OpenInitialize ();
 450
 451         access_policy = policy;
 452
 453         if (!(source_location = GetDeployment ()->GetXapLocation ()))
 454                 source_location = GetSurface ()->GetSourceLocation ();
 455
 456         // FIXME: ONLY VALIDATE IF USED FROM THE PLUGIN
 457         if (!Downloader::ValidateDownloadPolicy (source_location, uri, policy)) {
 458                 LOG_DOWNLOADER ("aborting due to security policy violation\n");
 459                 failed_msg = g_strdup ("Security Policy Violation");
 460                 Abort ();
 461                 return;
 462         }
 463
 464         if (!uri->isAbsolute && source_location) {
 465                 src_uri = new Uri ();
 466                 if (!src_uri->Parse (source_location, true)) {
 467                         delete src_uri;
 468                         return;
 469                 }
 470
 471                 src_uri->Combine (uri);
 472                 url = src_uri;
 473         }
 474
 475         if (policy == StreamingPolicy) {
 476                 internal_dl = (InternalDownloader *) new MmsDownloader (this);
 477         } else {
 478                 internal_dl = (InternalDownloader *) new FileDownloader (this);
 479         }
 480
 481         send_queued = false;
 482
 483         SetUri (uri);
 484
 485         str = url->ToString ();
 486         delete src_uri;
 487
 488         internal_dl->Open (verb, str);
 489         g_free (str);
 490 }
 491
 492 void
 493 Downloader::InternalSetHeader (const char *header, const char *value)
 494 {
 495         LOG_DOWNLOADER ("Downloader::InternalSetHeader (%s, %s)\n", header, value);
 496
 497         header_func (downloader_state, header, value);
 498 }
 499
 500 void
 501 Downloader::InternalSetHeaderFormatted (const char *header, char *value)
 502 {
 503         InternalSetHeader (header, (const char *) value);
 504         g_free (value);
 505 }
 506
 507 void
 508 Downloader::InternalSetBody (void *body, guint32 length)
 509 {
 510         LOG_DOWNLOADER ("Downloader::InternalSetBody (%p, %u)\n", body, length);
 511
 512         body_func (downloader_state, body, length);
 513 }
 514
 515 void
 516 Downloader::SendInternal ()
 517 {
 518         LOG_DOWNLOADER ("Downloader::SendInternal ()\n");
 519
 520         if (!GetSurface ()) {
 521                 // The plugin is already checking for surface before calling Send, so
 522                 // if we get here, it's either managed code doing something wrong or ourselves.
 523                 g_warning ("Downloader::SendInternal (): No surface!\n");
 524         }
 525
 526         if (!send_queued)
 527                 return;
 528
 529         send_queued = false;
 530
 531         if (completed) {
 532                 // Consumer is re-sending a request which finished successfully.
 533                 NotifyFinished (NULL);
 534                 return;
 535         }
 536
 537         if (failed_msg != NULL) {
 538                 // Consumer is re-sending a request which failed.
 539                 Emit (DownloadFailedEvent, new ErrorEventArgs (DownloadError,
 540                                                                MoonError (MoonError::EXCEPTION, 1, failed_msg)));
 541                 return;
 542         }
 543
 544         started = true;
 545         aborted = false;
 546
 547         send_func (downloader_state);
 548 }
 549
 550 static void
 551 send_async (EventObject *user_data)
 552 {
 553         Downloader *downloader = (Downloader *) user_data;
 554
 555         downloader->SendInternal ();
 556 }
 557
 558 void
 559 Downloader::Send ()
 560 {
 561         LOG_DOWNLOADER ("Downloader::Send ()\n");
 562
 563         if (!GetSurface ()) {
 564                 // The plugin is already checking for surface before calling Send, so
 565                 // if we get here, it's either managed code doing something wrong or ourselves.
 566                 g_warning ("Downloader::Send (): No surface!\n");
 567         }
 568
 569         if (send_queued)
 570                 return;
 571
 572         send_queued = true;
 573         SetStatusText ("");
 574         SetStatus (0);
 575
 576         AddTickCall (send_async);
 577 }
 578
 579 void
 580 Downloader::SendNow ()
 581 {
 582         LOG_DOWNLOADER ("Downloader::SendNow ()\n");
 583
 584         send_queued = true;
 585         SetStatusText ("");
 586         SetStatus (0);
 587
 588         SendInternal ();
 589 }
 590
 591 //
 592 // A zero write means that we are done
 593 //
 594 void
 595 Downloader::Write (void *buf, gint32 offset, gint32 n)
 596 {
 597         char* struri = NULL;
 598         LOG_DOWNLOADER ("Downloader::Write (%p, %i, %i). Uri: %s\n", buf, offset, n, (struri = GetUri ()->ToString ()));
 599         g_free (struri);
 600
 601         SetCurrentDeployment ();
 602
 603         if (aborted)
 604                 return;
 605
 606         if (!GetSurface ())
 607                 return;
 608
 609         internal_dl->Write (buf, offset, n);
 610 }
 611
 612 void
 613 Downloader::InternalWrite (void *buf, gint32 offset, gint32 n)
 614 {
 615         LOG_DOWNLOADER ("Downloader::InternalWrite (%p, %i, %i)\n", buf, offset, n);
 616
 617         double progress;
 618
 619         // Update progress
 620         if (n > 0)
 621                 total += n;
 622
 623         if (file_size >= 0) {
 624                 if ((progress = total / (double) file_size) > 1.0)
 625                         progress = 1.0;
 626         } else
 627                 progress = 0.0;
 628
 629         SetDownloadProgress (progress);
 630
 631         Emit (DownloadProgressChangedEvent);
 632
 633         if (writer)
 634                 writer (buf, offset, n, user_data);
 635
 636         // This is a horrible hack to work around mozilla bug #444160
 637         // See Downloader::GetResponseText for an explanation
 638         if (internal_dl->GetObjectType () == Type::FILEDOWNLOADER && n == total && total < 65536) {
 639                 buffer = (char *) g_malloc ((size_t) total);
 640                 memcpy (buffer, buf, (size_t) total);
 641         }
 642 }
 643
 644 void
 645 Downloader::SetFilename (const char *fname)
 646 {
 647         LOG_DOWNLOADER ("Downloader::SetFilename (%s)\n", fname);
 648
 649         g_free (filename);
 650         g_free (buffer);
 651         buffer = NULL;
 652
 653         filename = g_strdup (fname);
 654
 655         internal_dl->SetFilename (filename);
 656 }
 657
 658 void
 659 Downloader::NotifyFinished (const char *final_uri)
 660 {
 661         if (aborted)
 662                 return;
 663
 664         SetCurrentDeployment ();
 665
 666         if (!GetSurface ())
 667                 return;
 668
 669         SetDownloadProgress (1.0);
 670
 671         Emit (DownloadProgressChangedEvent);
 672
 673         // HACK, we should provide the actual status text and code
 674         SetStatusText ("OK");
 675         SetStatus (200);
 676
 677         completed = true;
 678
 679         Emit (CompletedEvent, NULL);
 680 }
 681
 682 void
 683 Downloader::NotifyFailed (const char *msg)
 684 {
 685         LOG_DOWNLOADER ("Downloader::NotifyFailed (%s)\n", msg);
 686
 687         /* if we've already been notified of failure, no-op */
 688         if (failed_msg)
 689                 return;
 690
 691         SetCurrentDeployment ();
 692
 693         if (!GetSurface ())
 694                 return;
 695
 696         // SetStatus (400);
 697         // For some reason the status is 0, not updated on errors?
 698
 699         Emit (DownloadFailedEvent, new ErrorEventArgs (DownloadError,
 700                                                        MoonError (MoonError::EXCEPTION, 1, msg)));
 701
 702         failed_msg = g_strdup (msg);
 703 }
 704
 705 void
 706 Downloader::NotifySize (gint64 size)
 707 {
 708         LOG_DOWNLOADER ("Downloader::NotifySize (%" G_GINT64_FORMAT ")\n", size);
 709
 710         file_size = size;
 711
 712         if (aborted)
 713                 return;
 714
 715         SetCurrentDeployment ();
 716
 717         if (!GetSurface ())
 718                 return;
 719
 720         if (notify_size)
 721                 notify_size (size, user_data);
 722 }
 723
 724 bool
 725 Downloader::Started ()
 726 {
 727         LOG_DOWNLOADER ("Downloader::Started (): %i\n", started);
 728
 729         return started;
 730 }
 731
 732 bool
 733 Downloader::Completed ()
 734 {
 735         LOG_DOWNLOADER ("Downloader::Completed (), filename: %s\n", filename);
 736
 737         return completed;
 738 }
 739
 740 void
 741 Downloader::SetStreamFunctions (DownloaderWriteFunc writer,
 742                                 DownloaderNotifySizeFunc notify_size,
 743                                 gpointer user_data)
 744 {
 745         LOG_DOWNLOADER ("Downloader::SetStreamFunctions\n");
 746
 747         this->notify_size = notify_size;
 748         this->writer = writer;
 749         this->user_data = user_data;
 750 }
 751
 752 void
 753 Downloader::SetFunctions (DownloaderCreateStateFunc create_state,
 754                           DownloaderDestroyStateFunc destroy_state,
 755                           DownloaderOpenFunc open,
 756                           DownloaderSendFunc send,
 757                           DownloaderAbortFunc abort,
 758                           DownloaderHeaderFunc header,
 759                           DownloaderBodyFunc body,
 760                           DownloaderCreateWebRequestFunc request,
 761                           DownloaderSetResponseHeaderCallbackFunc response_header_callback,
 762                           DownloaderGetResponseFunc get_response)
 763 {
 764         LOG_DOWNLOADER ("Downloader::SetFunctions\n");
 765         Downloader::create_state = create_state;
 766         Downloader::destroy_state = destroy_state;
 767         Downloader::open_func = open;
 768         Downloader::send_func = send;
 769         Downloader::abort_func = abort;
 770         Downloader::header_func = header;
 771         Downloader::body_func = body;
 772         Downloader::request_func = request;
 773         Downloader::set_response_header_callback_func = response_header_callback;
 774         Downloader::get_response_func = get_response;
 775 }
 776
 777
 778 /*
 779  * DownloaderRequest / DownloaderResponse
 780  */
 781
 782 DownloaderResponse::~DownloaderResponse ()
 783 {
 784         if (request != NULL && request->GetDownloaderResponse () == this)
 785                 request->SetDownloaderResponse (NULL);
 786         GetDeployment ()->UnregisterDownloader (this);
 787 }
 788
 789 DownloaderResponse::DownloaderResponse ()
 790 {
 791         aborted = false;
 792         started = NULL;
 793         available = NULL;
 794         finished = NULL;
 795         context = NULL;
 796         request = NULL;
 797         SetDeployment (Deployment::GetCurrent ());
 798         GetDeployment ()->RegisterDownloader (this);
 799 }
 800
 801 DownloaderResponse::DownloaderResponse (DownloaderResponseStartedHandler started, DownloaderResponseDataAvailableHandler available, DownloaderResponseFinishedHandler finished, gpointer context)
 802 {
 803         this->aborted = false;
 804         this->started = started;
 805         this->available = available;
 806         this->finished = finished;
 807         this->context = context;
 808         this->request = NULL;
 809         SetDeployment (Deployment::GetCurrent ());
 810         GetDeployment ()->RegisterDownloader (this);
 811 }
 812
 813 DownloaderRequest::DownloaderRequest (const char *method, const char *uri)
 814 {
 815         this->method = g_strdup (method);
 816         this->uri = g_strdup (uri);
 817         this->response = NULL;
 818         SetDeployment (Deployment::GetCurrent ());
 819         GetDeployment ()->RegisterDownloader (this);
 820 }
 821
 822 DownloaderRequest::~DownloaderRequest ()
 823 {
 824         g_free (method);
 825         g_free (uri);
 826         if (response != NULL && response->GetDownloaderRequest () == this)
 827                 response->SetDownloaderRequest (NULL);
 828         GetDeployment ()->UnregisterDownloader (this);
 829 }
 830
 831 void *
 832 Downloader::CreateWebRequest (const char *method, const char *uri)
 833 {
 834         return GetRequestFunc () (method, uri, GetContext ());
 835 }
 836
 837 void
 838 Downloader::SetResponseHeaderCallback (DownloaderResponseHeaderCallback callback, gpointer context)
 839 {
 840         if (set_response_header_callback_func != NULL)
 841                 set_response_header_callback_func (downloader_state, callback, context);
 842 }
 843
 844 DownloaderResponse *
 845 Downloader::GetResponse ()
 846 {
 847         if (get_response_func != NULL)
 848                 return get_response_func (downloader_state);
 849         return NULL;
 850 }
 851
 852 void
 853 downloader_write (Downloader *dl, void *buf, gint32 offset, gint32 n)
 854 {
 855         dl->Write (buf, offset, n);
 856 }
 857
 858 void
 859 downloader_notify_finished (Downloader *dl, const char *fname)
 860 {
 861         dl->SetFilename (fname);
 862         dl->NotifyFinished (NULL);
 863 }
 864
 865 void
 866 downloader_notify_error (Downloader *dl, const char *msg)
 867 {
 868         dl->NotifyFailed (msg);
 869 }
 870
 871 void
 872 downloader_notify_size (Downloader *dl, gint64 size)
 873 {
 874         dl->NotifySize (size);
 875 }
 876
 877
 878 static gpointer
 879 dummy_downloader_create_state (Downloader* dl)
 880 {
 881         g_warning ("downloader_set_function has never been called.\n");
 882         return NULL;
 883 }
 884
 885 static void
 886 dummy_downloader_destroy_state (gpointer state)
 887 {
 888         g_warning ("downloader_set_function has never been called.\n");
 889 }
 890
 891 static void
 892 dummy_downloader_open (gpointer state, const char *verb, const char *uri, bool custom_header_support, bool disble_cache)
 893 {
 894         g_warning ("downloader_set_function has never been called.\n");
 895 }
 896
 897 static void
 898 dummy_downloader_send (gpointer state)
 899 {
 900         g_warning ("downloader_set_function has never been called.\n");
 901 }
 902
 903 static void
 904 dummy_downloader_abort (gpointer state)
 905 {
 906         g_warning ("downloader_set_function has never been called.\n");
 907 }
 908
 909 static void
 910 dummy_downloader_header (gpointer state, const char *header, const char *value)
 911 {
 912         g_warning ("downloader_set_function has never been called.\n");
 913 }
 914
 915 static void
 916 dummy_downloader_body (gpointer state, void *body, guint32 length)
 917 {
 918         g_warning ("downloader_set_function has never been called.\n");
 919 }
 920
 921 static gpointer
 922 dummy_downloader_create_web_request (const char *method, const char *uri, gpointer context)
 923 {
 924         g_warning ("downloader_set_function has never been called.\n");
 925         return NULL;
 926 }
 927
 928 static void
 929 dummy_downloader_set_response_header_callback (gpointer state, DownloaderResponseHeaderCallback callback, gpointer context)
 930 {
 931         g_warning ("downloader_set_function has never been called.\n");
 932 }
 933
 934 static DownloaderResponse *
 935 dummy_downloader_get_response (gpointer state)
 936 {
 937         g_warning ("downloader_set_function has never been called.\n");
 938         return NULL;
 939 }
 940
 941 DownloaderCreateStateFunc Downloader::create_state = dummy_downloader_create_state;
 942 DownloaderDestroyStateFunc Downloader::destroy_state = dummy_downloader_destroy_state;
 943 DownloaderOpenFunc Downloader::open_func = dummy_downloader_open;
 944 DownloaderSendFunc Downloader::send_func = dummy_downloader_send;
 945 DownloaderAbortFunc Downloader::abort_func = dummy_downloader_abort;
 946 DownloaderHeaderFunc Downloader::header_func = dummy_downloader_header;
 947 DownloaderBodyFunc Downloader::body_func = dummy_downloader_body;
 948 DownloaderCreateWebRequestFunc Downloader::request_func = dummy_downloader_create_web_request;
 949 DownloaderSetResponseHeaderCallbackFunc Downloader::set_response_header_callback_func = dummy_downloader_set_response_header_callback;
 950 DownloaderGetResponseFunc Downloader::get_response_func = dummy_downloader_get_response;
 951
 952 void
 953 downloader_init (void)
 954 {
 955 }