apt-pkg/acquire-item.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: acquire-item.cc,v 1.46.2.9 2004/01/16 18:51:11 mdz Exp $
   4 /* ######################################################################
   5
   6    Acquire Item - Item to acquire
   7
   8    Each item can download to exactly one file at a time. This means you
   9    cannot create an item that fetches two uri's to two files at the same
  10    time. The pkgAcqIndex class creates a second class upon instantiation
  11    to fetch the other index files because of this.
  12
  13    ##################################################################### */
  14                                                                         /*}}}*/
  15 // Include Files                                                        /*{{{*/
  16 #ifdef __GNUG__
  17 #pragma implementation "apt-pkg/acquire-item.h"
  18 #endif
  19 #include <apt-pkg/acquire-item.h>
  20 #include <apt-pkg/configuration.h>
  21 #include <apt-pkg/sourcelist.h>
  22 #include <apt-pkg/vendorlist.h>
  23 #include <apt-pkg/error.h>
  24 #include <apt-pkg/strutl.h>
  25 #include <apt-pkg/fileutl.h>
  26 #include <apt-pkg/md5.h>
  27 #include <apt-pkg/sha1.h>
  28 #include <apt-pkg/tagfile.h>
  29
  30 #include <apti18n.h>
  31
  32 #include <sys/stat.h>
  33 #include <unistd.h>
  34 #include <errno.h>
  35 #include <string>
  36 #include <sstream>
  37 #include <stdio.h>
  38                                                                         /*}}}*/
  39
  40 using namespace std;
  41
  42 // Acquire::Item::Item - Constructor                                    /*{{{*/
  43 // ---------------------------------------------------------------------
  44 /* */
  45 pkgAcquire::Item::Item(pkgAcquire *Owner) : Owner(Owner), FileSize(0),
  46                        PartialSize(0), Mode(0), ID(0), Complete(false),
  47                        Local(false), QueueCounter(0)
  48 {
  49    Owner->Add(this);
  50    Status = StatIdle;
  51 }
  52                                                                         /*}}}*/
  53 // Acquire::Item::~Item - Destructor                                    /*{{{*/
  54 // ---------------------------------------------------------------------
  55 /* */
  56 pkgAcquire::Item::~Item()
  57 {
  58    Owner->Remove(this);
  59 }
  60                                                                         /*}}}*/
  61 // Acquire::Item::Failed - Item failed to download                      /*{{{*/
  62 // ---------------------------------------------------------------------
  63 /* We return to an idle state if there are still other queues that could
  64    fetch this object */
  65 void pkgAcquire::Item::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
  66 {
  67    Status = StatIdle;
  68    ErrorText = LookupTag(Message,"Message");
  69    if (QueueCounter <= 1)
  70    {
  71       /* This indicates that the file is not available right now but might
  72          be sometime later. If we do a retry cycle then this should be
  73          retried [CDROMs] */
  74       if (Cnf->LocalOnly == true &&
  75           StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
  76       {
  77          Status = StatIdle;
  78          Dequeue();
  79          return;
  80       }
  81
  82       Status = StatError;
  83       Dequeue();
  84    }
  85 }
  86                                                                         /*}}}*/
  87 // Acquire::Item::Start - Item has begun to download                    /*{{{*/
  88 // ---------------------------------------------------------------------
  89 /* Stash status and the file size. Note that setting Complete means
  90    sub-phases of the acquire process such as decompresion are operating */
  91 void pkgAcquire::Item::Start(string /*Message*/,unsigned long Size)
  92 {
  93    Status = StatFetching;
  94    if (FileSize == 0 && Complete == false)
  95       FileSize = Size;
  96 }
  97                                                                         /*}}}*/
  98 // Acquire::Item::Done - Item downloaded OK                             /*{{{*/
  99 // ---------------------------------------------------------------------
 100 /* */
 101 void pkgAcquire::Item::Done(string Message,unsigned long Size,string,
 102                             pkgAcquire::MethodConfig *Cnf)
 103 {
 104    // We just downloaded something..
 105    string FileName = LookupTag(Message,"Filename");
 106    // we only inform the Log class if it was actually not a local thing
 107    if (Complete == false && !Local && FileName == DestFile)
 108    {
 109       if (Owner->Log != 0)
 110          Owner->Log->Fetched(Size,atoi(LookupTag(Message,"Resume-Point","0").c_str()));
 111    }
 112
 113    if (FileSize == 0)
 114       FileSize= Size;
 115
 116    Status = StatDone;
 117    ErrorText = string();
 118    Owner->Dequeue(this);
 119 }
 120                                                                         /*}}}*/
 121 // Acquire::Item::Rename - Rename a file                                /*{{{*/
 122 // ---------------------------------------------------------------------
 123 /* This helper function is used by alot of item methods as thier final
 124    step */
 125 void pkgAcquire::Item::Rename(string From,string To)
 126 {
 127    if (rename(From.c_str(),To.c_str()) != 0)
 128    {
 129       char S[300];
 130       snprintf(S,sizeof(S),_("rename failed, %s (%s -> %s)."),strerror(errno),
 131               From.c_str(),To.c_str());
 132       Status = StatError;
 133       ErrorText = S;
 134    }
 135 }
 136                                                                         /*}}}*/
 137
 138
 139 // AcqDiffIndex::AcqDiffIndex - Constructor
 140 // ---------------------------------------------------------------------
 141 /* Get the DiffIndex file first and see if there are patches availabe
 142  * If so, create a pkgAcqIndexDiffs fetcher that will get and apply the
 143  * patches. If anything goes wrong in that process, it will fall back to
 144  * the original packages file
 145  */
 146 pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire *Owner,
 147                                  string URI,string URIDesc,string ShortDesc,
 148                                  string ExpectedMD5)
 149    : Item(Owner), RealURI(URI), ExpectedMD5(ExpectedMD5), Description(URIDesc)
 150 {
 151
 152    Debug = _config->FindB("Debug::pkgAcquire::Diffs",false);
 153
 154    Desc.Description = URIDesc + "/DiffIndex";
 155    Desc.Owner = this;
 156    Desc.ShortDesc = ShortDesc;
 157    Desc.URI = URI + ".diff/Index";
 158
 159    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 160    DestFile += URItoFileName(URI) + string(".DiffIndex");
 161
 162    if(Debug)
 163       std::clog << "pkgAcqDiffIndex: " << Desc.URI << std::endl;
 164
 165    // look for the current package file
 166    CurrentPackagesFile = _config->FindDir("Dir::State::lists");
 167    CurrentPackagesFile += URItoFileName(RealURI);
 168
 169    // FIXME: this file:/ check is a hack to prevent fetching
 170    //        from local sources. this is really silly, and
 171    //        should be fixed cleanly as soon as possible
 172    if(!FileExists(CurrentPackagesFile) ||
 173       Desc.URI.substr(0,strlen("file:/")) == "file:/")
 174    {
 175       // we don't have a pkg file or we don't want to queue
 176       if(Debug)
 177          std::clog << "No index file, local or canceld by user" << std::endl;
 178       Failed("", NULL);
 179       return;
 180    }
 181
 182    if(Debug)
 183       std::clog << "pkgAcqIndexDiffs::pkgAcqIndexDiffs(): "
 184                 << CurrentPackagesFile << std::endl;
 185
 186    QueueURI(Desc);
 187
 188 }
 189
 190 // AcqIndex::Custom600Headers - Insert custom request headers           /*{{{*/
 191 // ---------------------------------------------------------------------
 192 /* The only header we use is the last-modified header. */
 193 string pkgAcqDiffIndex::Custom600Headers()
 194 {
 195    string Final = _config->FindDir("Dir::State::lists");
 196    Final += URItoFileName(RealURI) + string(".IndexDiff");
 197
 198    if(Debug)
 199       std::clog << "Custom600Header-IMS: " << Final << std::endl;
 200
 201    struct stat Buf;
 202    if (stat(Final.c_str(),&Buf) != 0)
 203       return "\nIndex-File: true";
 204
 205    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 206 }
 207
 208
 209 bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)
 210 {
 211    if(Debug)
 212       std::clog << "pkgAcqIndexDiffs::ParseIndexDiff() " << IndexDiffFile
 213                 << std::endl;
 214
 215    pkgTagSection Tags;
 216    string ServerSha1;
 217    vector<DiffInfo> available_patches;
 218
 219    FileFd Fd(IndexDiffFile,FileFd::ReadOnly);
 220    pkgTagFile TF(&Fd);
 221    if (_error->PendingError() == true)
 222       return false;
 223
 224    if(TF.Step(Tags) == true)
 225    {
 226       string local_sha1;
 227       bool found = false;
 228       DiffInfo d;
 229       string size;
 230
 231       string tmp = Tags.FindS("SHA1-Current");
 232       std::stringstream ss(tmp);
 233       ss >> ServerSha1;
 234
 235       FileFd fd(CurrentPackagesFile, FileFd::ReadOnly);
 236       SHA1Summation SHA1;
 237       SHA1.AddFD(fd.Fd(), fd.Size());
 238       local_sha1 = string(SHA1.Result());
 239
 240       if(local_sha1 == ServerSha1)
 241       {
 242          // we have the same sha1 as the server
 243          if(Debug)
 244             std::clog << "Package file is up-to-date" << std::endl;
 245          // set found to true, this will queue a pkgAcqIndexDiffs with
 246          // a empty availabe_patches
 247          found = true;
 248       }
 249       else
 250       {
 251          if(Debug)
 252             std::clog << "SHA1-Current: " << ServerSha1 << std::endl;
 253
 254          // check the historie and see what patches we need
 255          string history = Tags.FindS("SHA1-History");
 256          std::stringstream hist(history);
 257          while(hist >> d.sha1 >> size >> d.file)
 258          {
 259             d.size = atoi(size.c_str());
 260             // read until the first match is found
 261             if(d.sha1 == local_sha1)
 262                found=true;
 263             // from that point on, we probably need all diffs
 264             if(found)
 265             {
 266                if(Debug)
 267                   std::clog << "Need to get diff: " << d.file << std::endl;
 268                available_patches.push_back(d);
 269             }
 270          }
 271       }
 272
 273       // no information how to get the patches, bail out
 274       if(!found)
 275       {
 276          if(Debug)
 277             std::clog << "Can't find a patch in the index file" << std::endl;
 278          // Failed will queue a big package file
 279          Failed("", NULL);
 280       }
 281       else
 282       {
 283          // queue the diffs
 284          new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,
 285                               ExpectedMD5, available_patches);
 286          Complete = false;
 287          Status = StatDone;
 288          Dequeue();
 289          return true;
 290       }
 291    }
 292
 293    return false;
 294 }
 295
 296 void pkgAcqDiffIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 297 {
 298    if(Debug)
 299       std::clog << "pkgAcqDiffIndex failed: " << Desc.URI << std::endl
 300                 << "Falling back to normal index file aquire" << std::endl;
 301
 302    new pkgAcqIndex(Owner, RealURI, Description, Desc.ShortDesc,
 303                    ExpectedMD5);
 304
 305    Complete = false;
 306    Status = StatDone;
 307    Dequeue();
 308 }
 309
 310 void pkgAcqDiffIndex::Done(string Message,unsigned long Size,string Md5Hash,
 311                            pkgAcquire::MethodConfig *Cnf)
 312 {
 313    if(Debug)
 314       std::clog << "pkgAcqDiffIndex::Done(): " << Desc.URI << std::endl;
 315
 316    Item::Done(Message,Size,Md5Hash,Cnf);
 317
 318    string FinalFile;
 319    FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(RealURI);
 320
 321    // sucess in downloading the index
 322    // rename the index
 323    FinalFile += string(".IndexDiff");
 324    if(Debug)
 325       std::clog << "Renaming: " << DestFile << " -> " << FinalFile
 326                 << std::endl;
 327    Rename(DestFile,FinalFile);
 328    chmod(FinalFile.c_str(),0644);
 329    DestFile = FinalFile;
 330
 331    if(!ParseDiffIndex(DestFile))
 332       return Failed("", NULL);
 333
 334    Complete = true;
 335    Status = StatDone;
 336    Dequeue();
 337    return;
 338 }
 339
 340
 341
 342 // AcqIndexDiffs::AcqIndexDiffs - Constructor
 343 // ---------------------------------------------------------------------
 344 /* The package diff is added to the queue. one object is constructed
 345  * for each diff and the index
 346  */
 347 pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire *Owner,
 348                                    string URI,string URIDesc,string ShortDesc,
 349                                    string ExpectedMD5, vector<DiffInfo> diffs)
 350    : Item(Owner), RealURI(URI), ExpectedMD5(ExpectedMD5),
 351      available_patches(diffs)
 352 {
 353
 354    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 355    DestFile += URItoFileName(URI);
 356
 357    Debug = _config->FindB("Debug::pkgAcquire::Diffs",false);
 358
 359    Desc.Description = URIDesc;
 360    Desc.Owner = this;
 361    Desc.ShortDesc = ShortDesc;
 362
 363    if(available_patches.size() == 0)
 364    {
 365       // we are done (yeah!)
 366       Finish(true);
 367    }
 368    else
 369    {
 370       // get the next diff
 371       State = StateFetchDiff;
 372       QueueNextDiff();
 373    }
 374 }
 375
 376
 377 void pkgAcqIndexDiffs::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 378 {
 379    if(Debug)
 380       std::clog << "pkgAcqIndexDiffs failed: " << Desc.URI << std::endl
 381                 << "Falling back to normal index file aquire" << std::endl;
 382    new pkgAcqIndex(Owner, RealURI, Description,Desc.ShortDesc,
 383                    ExpectedMD5);
 384    Finish();
 385 }
 386
 387
 388 // helper that cleans the item out of the fetcher queue
 389 void pkgAcqIndexDiffs::Finish(bool allDone)
 390 {
 391    // we restore the original name, this is required, otherwise
 392    // the file will be cleaned
 393    if(allDone)
 394    {
 395       DestFile = _config->FindDir("Dir::State::lists");
 396       DestFile += URItoFileName(RealURI);
 397
 398       // do the final md5sum checking
 399       MD5Summation sum;
 400       FileFd Fd(DestFile, FileFd::ReadOnly);
 401       sum.AddFD(Fd.Fd(), Fd.Size());
 402       Fd.Close();
 403       string MD5 = (string)sum.Result();
 404
 405       if (!ExpectedMD5.empty() && MD5 != ExpectedMD5)
 406       {
 407          Status = StatAuthError;
 408          ErrorText = _("MD5Sum mismatch");
 409          Rename(DestFile,DestFile + ".FAILED");
 410          Dequeue();
 411          return;
 412       }
 413
 414       // this is for the "real" finish
 415       Complete = true;
 416       Status = StatDone;
 417       Dequeue();
 418       if(Debug)
 419          std::clog << "\n\nallDone: " << DestFile << "\n" << std::endl;
 420       return;
 421    }
 422
 423    if(Debug)
 424       std::clog << "Finishing: " << Desc.URI << std::endl;
 425    Complete = false;
 426    Status = StatDone;
 427    Dequeue();
 428    return;
 429 }
 430
 431
 432
 433 bool pkgAcqIndexDiffs::QueueNextDiff()
 434 {
 435
 436    // calc sha1 of the just patched file
 437    string FinalFile = _config->FindDir("Dir::State::lists");
 438    FinalFile += URItoFileName(RealURI);
 439
 440    FileFd fd(FinalFile, FileFd::ReadOnly);
 441    SHA1Summation SHA1;
 442    SHA1.AddFD(fd.Fd(), fd.Size());
 443    string local_sha1 = string(SHA1.Result());
 444    if(Debug)
 445       std::clog << "QueueNextDiff: "
 446                 << FinalFile << " (" << local_sha1 << ")"<<std::endl;
 447
 448    // remove all patches until the next matching patch is found
 449    // this requires the Index file to be ordered
 450    for(vector<DiffInfo>::iterator I=available_patches.begin();
 451        available_patches.size() > 0 &&
 452           I != available_patches.end() &&
 453           (*I).sha1 != local_sha1;
 454        I++)
 455    {
 456       available_patches.erase(I);
 457    }
 458
 459    // error checking and falling back if no patch was found
 460    if(available_patches.size() == 0)
 461    {
 462       Failed("", NULL);
 463       return false;
 464    }
 465
 466    // queue the right diff
 467    Desc.URI = string(RealURI) + ".diff/" + available_patches[0].file + ".gz";
 468    Desc.Description = available_patches[0].file + string(".pdiff");
 469
 470    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 471    DestFile += URItoFileName(RealURI + ".diff/" + available_patches[0].file);
 472
 473    if(Debug)
 474       std::clog << "pkgAcqIndexDiffs::QueueNextDiff(): " << Desc.URI << std::endl;
 475
 476    QueueURI(Desc);
 477
 478    return true;
 479 }
 480
 481
 482
 483 void pkgAcqIndexDiffs::Done(string Message,unsigned long Size,string Md5Hash,
 484                             pkgAcquire::MethodConfig *Cnf)
 485 {
 486    if(Debug)
 487       std::clog << "pkgAcqIndexDiffs::Done(): " << Desc.URI << std::endl;
 488
 489    Item::Done(Message,Size,Md5Hash,Cnf);
 490
 491    string FinalFile;
 492    FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(RealURI);
 493
 494    // sucess in downloading a diff, enter ApplyDiff state
 495    if(State == StateFetchDiff)
 496    {
 497
 498       if(Debug)
 499          std::clog << "Sending to gzip method: " << FinalFile << std::endl;
 500
 501       string FileName = LookupTag(Message,"Filename");
 502       State = StateUnzipDiff;
 503       Local = true;
 504       Desc.URI = "gzip:" + FileName;
 505       DestFile += ".decomp";
 506       QueueURI(Desc);
 507       Mode = "gzip";
 508       return;
 509    }
 510
 511    // sucess in downloading a diff, enter ApplyDiff state
 512    if(State == StateUnzipDiff)
 513    {
 514
 515       // rred excepts the patch as $FinalFile.ed
 516       Rename(DestFile,FinalFile+".ed");
 517
 518       if(Debug)
 519          std::clog << "Sending to rred method: " << FinalFile << std::endl;
 520
 521       State = StateApplyDiff;
 522       Local = true;
 523       Desc.URI = "rred:" + FinalFile;
 524       QueueURI(Desc);
 525       Mode = "rred";
 526       return;
 527    }
 528
 529
 530    // success in download/apply a diff, queue next (if needed)
 531    if(State == StateApplyDiff)
 532    {
 533       // remove the just applied patch
 534       available_patches.erase(available_patches.begin());
 535
 536       // move into place
 537       if(Debug)
 538       {
 539          std::clog << "Moving patched file in place: " << std::endl
 540                    << DestFile << " -> " << FinalFile << std::endl;
 541       }
 542       Rename(DestFile,FinalFile);
 543
 544       // see if there is more to download
 545       if(available_patches.size() > 0) {
 546          new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,
 547                               ExpectedMD5, available_patches);
 548          return Finish();
 549       } else
 550          return Finish(true);
 551    }
 552 }
 553
 554
 555 // AcqIndex::AcqIndex - Constructor                                     /*{{{*/
 556 // ---------------------------------------------------------------------
 557 /* The package file is added to the queue and a second class is
 558    instantiated to fetch the revision file */
 559 pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner,
 560                          string URI,string URIDesc,string ShortDesc,
 561                          string ExpectedMD5, string comprExt)
 562    : Item(Owner), RealURI(URI), ExpectedMD5(ExpectedMD5)
 563 {
 564    Decompression = false;
 565    Erase = false;
 566
 567    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 568    DestFile += URItoFileName(URI);
 569
 570    if(comprExt.empty())
 571    {
 572       // autoselect the compression method
 573       if(FileExists("/usr/bin/bzip2"))
 574          CompressionExtension = ".bz2";
 575       else
 576          CompressionExtension = ".gz";
 577    } else {
 578       CompressionExtension = comprExt;
 579    }
 580    Desc.URI = URI + CompressionExtension;
 581
 582    Desc.Description = URIDesc;
 583    Desc.Owner = this;
 584    Desc.ShortDesc = ShortDesc;
 585
 586    QueueURI(Desc);
 587 }
 588                                                                         /*}}}*/
 589 // AcqIndex::Custom600Headers - Insert custom request headers           /*{{{*/
 590 // ---------------------------------------------------------------------
 591 /* The only header we use is the last-modified header. */
 592 string pkgAcqIndex::Custom600Headers()
 593 {
 594    string Final = _config->FindDir("Dir::State::lists");
 595    Final += URItoFileName(RealURI);
 596
 597    struct stat Buf;
 598    if (stat(Final.c_str(),&Buf) != 0)
 599       return "\nIndex-File: true";
 600
 601    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 602 }
 603                                                                         /*}}}*/
 604
 605 void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 606 {
 607    // no .bz2 found, retry with .gz
 608    if(Desc.URI.substr(Desc.URI.size()-3) == "bz2") {
 609       Desc.URI = Desc.URI.substr(0,Desc.URI.size()-3) + "gz";
 610
 611       // retry with a gzip one
 612       new pkgAcqIndex(Owner, RealURI, Desc.Description,Desc.ShortDesc,
 613                       ExpectedMD5, string(".gz"));
 614       Status = StatDone;
 615       Complete = false;
 616       Dequeue();
 617       return;
 618    }
 619
 620
 621    Item::Failed(Message,Cnf);
 622 }
 623
 624
 625 // AcqIndex::Done - Finished a fetch                                    /*{{{*/
 626 // ---------------------------------------------------------------------
 627 /* This goes through a number of states.. On the initial fetch the
 628    method could possibly return an alternate filename which points
 629    to the uncompressed version of the file. If this is so the file
 630    is copied into the partial directory. In all other cases the file
 631    is decompressed with a gzip uri. */
 632 void pkgAcqIndex::Done(string Message,unsigned long Size,string MD5,
 633                        pkgAcquire::MethodConfig *Cfg)
 634 {
 635    Item::Done(Message,Size,MD5,Cfg);
 636
 637    if (Decompression == true)
 638    {
 639       if (_config->FindB("Debug::pkgAcquire::Auth", false))
 640       {
 641          std::cerr << std::endl << RealURI << ": Computed MD5: " << MD5;
 642          std::cerr << "  Expected MD5: " << ExpectedMD5 << std::endl;
 643       }
 644
 645       if (MD5.empty())
 646       {
 647          MD5Summation sum;
 648          FileFd Fd(DestFile, FileFd::ReadOnly);
 649          sum.AddFD(Fd.Fd(), Fd.Size());
 650          Fd.Close();
 651          MD5 = (string)sum.Result();
 652       }
 653
 654       if (!ExpectedMD5.empty() && MD5 != ExpectedMD5)
 655       {
 656          Status = StatAuthError;
 657          ErrorText = _("MD5Sum mismatch");
 658          Rename(DestFile,DestFile + ".FAILED");
 659          return;
 660       }
 661       // Done, move it into position
 662       string FinalFile = _config->FindDir("Dir::State::lists");
 663       FinalFile += URItoFileName(RealURI);
 664       Rename(DestFile,FinalFile);
 665       chmod(FinalFile.c_str(),0644);
 666
 667       /* We restore the original name to DestFile so that the clean operation
 668          will work OK */
 669       DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 670       DestFile += URItoFileName(RealURI);
 671
 672       // Remove the compressed version.
 673       if (Erase == true)
 674          unlink(DestFile.c_str());
 675       return;
 676    }
 677
 678    Erase = false;
 679    Complete = true;
 680
 681    // Handle the unzipd case
 682    string FileName = LookupTag(Message,"Alt-Filename");
 683    if (FileName.empty() == false)
 684    {
 685       // The files timestamp matches
 686       if (StringToBool(LookupTag(Message,"Alt-IMS-Hit"),false) == true)
 687          return;
 688
 689       Decompression = true;
 690       Local = true;
 691       DestFile += ".decomp";
 692       Desc.URI = "copy:" + FileName;
 693       QueueURI(Desc);
 694       Mode = "copy";
 695       return;
 696    }
 697
 698    FileName = LookupTag(Message,"Filename");
 699    if (FileName.empty() == true)
 700    {
 701       Status = StatError;
 702       ErrorText = "Method gave a blank filename";
 703    }
 704
 705    // The files timestamp matches
 706    if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
 707       return;
 708
 709    if (FileName == DestFile)
 710       Erase = true;
 711    else
 712       Local = true;
 713
 714    string compExt = Desc.URI.substr(Desc.URI.size()-3);
 715    char *decompProg;
 716    if(compExt == "bz2")
 717       decompProg = "bzip2";
 718    else if(compExt == ".gz")
 719       decompProg = "gzip";
 720    else {
 721       _error->Error("Unsupported extension: %s", compExt.c_str());
 722       return;
 723    }
 724
 725    Decompression = true;
 726    DestFile += ".decomp";
 727    Desc.URI = string(decompProg) + ":" + FileName;
 728    QueueURI(Desc);
 729    Mode = decompProg;
 730 }
 731
 732 pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner,
 733                              string URI,string URIDesc,string ShortDesc,
 734                              string MetaIndexURI, string MetaIndexURIDesc,
 735                              string MetaIndexShortDesc,
 736                              const vector<IndexTarget*>* IndexTargets,
 737                              indexRecords* MetaIndexParser) :
 738    Item(Owner), RealURI(URI), MetaIndexURI(MetaIndexURI),
 739    MetaIndexURIDesc(MetaIndexURIDesc), MetaIndexShortDesc(MetaIndexShortDesc),
 740    MetaIndexParser(MetaIndexParser), IndexTargets(IndexTargets)
 741 {
 742    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 743    DestFile += URItoFileName(URI);
 744
 745    // remove any partial downloaded sig-file. it may confuse proxies
 746    // and is too small to warrant a partial download anyway
 747    unlink(DestFile.c_str());
 748
 749    // Create the item
 750    Desc.Description = URIDesc;
 751    Desc.Owner = this;
 752    Desc.ShortDesc = ShortDesc;
 753    Desc.URI = URI;
 754
 755
 756    string Final = _config->FindDir("Dir::State::lists");
 757    Final += URItoFileName(RealURI);
 758    struct stat Buf;
 759    if (stat(Final.c_str(),&Buf) == 0)
 760    {
 761       // File was already in place.  It needs to be re-verified
 762       // because Release might have changed, so Move it into partial
 763       Rename(Final,DestFile);
 764    }
 765
 766    QueueURI(Desc);
 767 }
 768                                                                         /*}}}*/
 769 // pkgAcqMetaSig::Custom600Headers - Insert custom request headers      /*{{{*/
 770 // ---------------------------------------------------------------------
 771 /* The only header we use is the last-modified header. */
 772 string pkgAcqMetaSig::Custom600Headers()
 773 {
 774    struct stat Buf;
 775    if (stat(DestFile.c_str(),&Buf) != 0)
 776       return "\nIndex-File: true";
 777
 778    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 779 }
 780
 781 void pkgAcqMetaSig::Done(string Message,unsigned long Size,string MD5,
 782                          pkgAcquire::MethodConfig *Cfg)
 783 {
 784    Item::Done(Message,Size,MD5,Cfg);
 785
 786    string FileName = LookupTag(Message,"Filename");
 787    if (FileName.empty() == true)
 788    {
 789       Status = StatError;
 790       ErrorText = "Method gave a blank filename";
 791       return;
 792    }
 793
 794    if (FileName != DestFile)
 795    {
 796       // We have to copy it into place
 797       Local = true;
 798       Desc.URI = "copy:" + FileName;
 799       QueueURI(Desc);
 800       return;
 801    }
 802
 803    Complete = true;
 804
 805    // queue a pkgAcqMetaIndex to be verified against the sig we just retrieved
 806    new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
 807                        DestFile, IndexTargets, MetaIndexParser);
 808
 809 }
 810                                                                         /*}}}*/
 811 void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 812 {
 813
 814    // if we get a network error we fail gracefully
 815    if(LookupTag(Message,"FailReason") == "Timeout" ||
 816       LookupTag(Message,"FailReason") == "TmpResolveFailure" ||
 817       LookupTag(Message,"FailReason") == "ConnectionRefused") {
 818       Item::Failed(Message,Cnf);
 819       return;
 820    }
 821
 822    // Delete any existing sigfile when the acquire failed
 823    string Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
 824    unlink(Final.c_str());
 825
 826    // queue a pkgAcqMetaIndex with no sigfile
 827    new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
 828                        "", IndexTargets, MetaIndexParser);
 829
 830    if (Cnf->LocalOnly == true ||
 831        StringToBool(LookupTag(Message,"Transient-Failure"),false) == false)
 832    {
 833       // Ignore this
 834       Status = StatDone;
 835       Complete = false;
 836       Dequeue();
 837       return;
 838    }
 839
 840    Item::Failed(Message,Cnf);
 841 }
 842
 843 pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire *Owner,
 844                                  string URI,string URIDesc,string ShortDesc,
 845                                  string SigFile,
 846                                  const vector<struct IndexTarget*>* IndexTargets,
 847                                  indexRecords* MetaIndexParser) :
 848    Item(Owner), RealURI(URI), SigFile(SigFile), AuthPass(false),
 849    MetaIndexParser(MetaIndexParser), IndexTargets(IndexTargets), IMSHit(false)
 850 {
 851    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 852    DestFile += URItoFileName(URI);
 853
 854    // Create the item
 855    Desc.Description = URIDesc;
 856    Desc.Owner = this;
 857    Desc.ShortDesc = ShortDesc;
 858    Desc.URI = URI;
 859
 860    QueueURI(Desc);
 861 }
 862
 863                                                                         /*}}}*/
 864 // pkgAcqMetaIndex::Custom600Headers - Insert custom request headers    /*{{{*/
 865 // ---------------------------------------------------------------------
 866 /* The only header we use is the last-modified header. */
 867 string pkgAcqMetaIndex::Custom600Headers()
 868 {
 869    string Final = _config->FindDir("Dir::State::lists");
 870    Final += URItoFileName(RealURI);
 871
 872    struct stat Buf;
 873    if (stat(Final.c_str(),&Buf) != 0)
 874       return "\nIndex-File: true";
 875
 876    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 877 }
 878
 879 void pkgAcqMetaIndex::Done(string Message,unsigned long Size,string MD5,
 880                            pkgAcquire::MethodConfig *Cfg)
 881 {
 882    Item::Done(Message,Size,MD5,Cfg);
 883
 884    // MetaIndexes are done in two passes: one to download the
 885    // metaindex with an appropriate method, and a second to verify it
 886    // with the gpgv method
 887
 888    if (AuthPass == true)
 889    {
 890       AuthDone(Message);
 891    }
 892    else
 893    {
 894       RetrievalDone(Message);
 895       if (!Complete)
 896          // Still more retrieving to do
 897          return;
 898
 899       if (SigFile == "")
 900       {
 901          // There was no signature file, so we are finished.  Download
 902          // the indexes without verification.
 903          QueueIndexes(false);
 904       }
 905       else
 906       {
 907          // There was a signature file, so pass it to gpgv for
 908          // verification
 909
 910          if (_config->FindB("Debug::pkgAcquire::Auth", false))
 911             std::cerr << "Metaindex acquired, queueing gpg verification ("
 912                       << SigFile << "," << DestFile << ")\n";
 913          AuthPass = true;
 914          Desc.URI = "gpgv:" + SigFile;
 915          QueueURI(Desc);
 916          Mode = "gpgv";
 917       }
 918    }
 919 }
 920
 921 void pkgAcqMetaIndex::RetrievalDone(string Message)
 922 {
 923    // We have just finished downloading a Release file (it is not
 924    // verified yet)
 925
 926    string FileName = LookupTag(Message,"Filename");
 927    if (FileName.empty() == true)
 928    {
 929       Status = StatError;
 930       ErrorText = "Method gave a blank filename";
 931       return;
 932    }
 933
 934    if (FileName != DestFile)
 935    {
 936       Local = true;
 937       Desc.URI = "copy:" + FileName;
 938       QueueURI(Desc);
 939       return;
 940    }
 941
 942    // see if the download was a IMSHit
 943    IMSHit = StringToBool(LookupTag(Message,"IMS-Hit"),false);
 944
 945    Complete = true;
 946
 947    string FinalFile = _config->FindDir("Dir::State::lists");
 948    FinalFile += URItoFileName(RealURI);
 949
 950    // The files timestamp matches
 951    if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == false)
 952    {
 953       // Move it into position
 954       Rename(DestFile,FinalFile);
 955    }
 956    DestFile = FinalFile;
 957 }
 958
 959 void pkgAcqMetaIndex::AuthDone(string Message)
 960 {
 961    // At this point, the gpgv method has succeeded, so there is a
 962    // valid signature from a key in the trusted keyring.  We
 963    // perform additional verification of its contents, and use them
 964    // to verify the indexes we are about to download
 965
 966    if (!MetaIndexParser->Load(DestFile))
 967    {
 968       Status = StatAuthError;
 969       ErrorText = MetaIndexParser->ErrorText;
 970       return;
 971    }
 972
 973    if (!VerifyVendor(Message))
 974    {
 975       return;
 976    }
 977
 978    if (_config->FindB("Debug::pkgAcquire::Auth", false))
 979       std::cerr << "Signature verification succeeded: "
 980                 << DestFile << std::endl;
 981
 982    // Download further indexes with verification
 983    QueueIndexes(true);
 984
 985    // Done, move signature file into position
 986
 987    string VerifiedSigFile = _config->FindDir("Dir::State::lists") +
 988       URItoFileName(RealURI) + ".gpg";
 989    Rename(SigFile,VerifiedSigFile);
 990    chmod(VerifiedSigFile.c_str(),0644);
 991 }
 992
 993 void pkgAcqMetaIndex::QueueIndexes(bool verify)
 994 {
 995    for (vector <struct IndexTarget*>::const_iterator Target = IndexTargets->begin();
 996         Target != IndexTargets->end();
 997         Target++)
 998    {
 999       string ExpectedIndexMD5;
1000       if (verify)
1001       {
1002          const indexRecords::checkSum *Record = MetaIndexParser->Lookup((*Target)->MetaKey);
1003          if (!Record)
1004          {
1005             Status = StatAuthError;
1006             ErrorText = "Unable to find expected entry  "
1007                + (*Target)->MetaKey + " in Meta-index file (malformed Release file?)";
1008             return;
1009          }
1010          ExpectedIndexMD5 = Record->MD5Hash;
1011          if (_config->FindB("Debug::pkgAcquire::Auth", false))
1012          {
1013             std::cerr << "Queueing: " << (*Target)->URI << std::endl;
1014             std::cerr << "Expected MD5: " << ExpectedIndexMD5 << std::endl;
1015          }
1016          if (ExpectedIndexMD5.empty())
1017          {
1018             Status = StatAuthError;
1019             ErrorText = "Unable to find MD5 sum for "
1020                + (*Target)->MetaKey + " in Meta-index file";
1021             return;
1022          }
1023       }
1024
1025       // Queue Packages file (either diff or full packages files, depending
1026       // on the users option)
1027       if(_config->FindB("Acquire::PDiffs",true) == true)
1028          new pkgAcqDiffIndex(Owner, (*Target)->URI, (*Target)->Description,
1029                              (*Target)->ShortDesc, ExpectedIndexMD5);
1030       else
1031          new pkgAcqIndex(Owner, (*Target)->URI, (*Target)->Description,
1032                             (*Target)->ShortDesc, ExpectedIndexMD5);
1033    }
1034 }
1035
1036 bool pkgAcqMetaIndex::VerifyVendor(string Message)
1037 {
1038 //    // Maybe this should be made available from above so we don't have
1039 //    // to read and parse it every time?
1040 //    pkgVendorList List;
1041 //    List.ReadMainList();
1042
1043 //    const Vendor* Vndr = NULL;
1044 //    for (std::vector<string>::const_iterator I = GPGVOutput.begin(); I != GPGVOutput.end(); I++)
1045 //    {
1046 //       string::size_type pos = (*I).find("VALIDSIG ");
1047 //       if (_config->FindB("Debug::Vendor", false))
1048 //          std::cerr << "Looking for VALIDSIG in \"" << (*I) << "\": pos " << pos
1049 //                    << std::endl;
1050 //       if (pos != std::string::npos)
1051 //       {
1052 //          string Fingerprint = (*I).substr(pos+sizeof("VALIDSIG"));
1053 //          if (_config->FindB("Debug::Vendor", false))
1054 //             std::cerr << "Looking for \"" << Fingerprint << "\" in vendor..." <<
1055 //                std::endl;
1056 //          Vndr = List.FindVendor(Fingerprint) != "";
1057 //          if (Vndr != NULL);
1058 //          break;
1059 //       }
1060 //    }
1061    string::size_type pos;
1062
1063    // check for missing sigs (that where not fatal because otherwise we had
1064    // bombed earlier)
1065    string missingkeys;
1066    string msg = _("There are no public key available for the "
1067                   "following key IDs:\n");
1068    pos = Message.find("NO_PUBKEY ");
1069    if (pos != std::string::npos)
1070    {
1071       string::size_type start = pos+strlen("NO_PUBKEY ");
1072       string Fingerprint = Message.substr(start, Message.find("\n")-start);
1073       missingkeys += (Fingerprint);
1074    }
1075    if(!missingkeys.empty())
1076       _error->Warning("%s", string(msg+missingkeys).c_str());
1077
1078    string Transformed = MetaIndexParser->GetExpectedDist();
1079
1080    if (Transformed == "../project/experimental")
1081    {
1082       Transformed = "experimental";
1083    }
1084
1085    pos = Transformed.rfind('/');
1086    if (pos != string::npos)
1087    {
1088       Transformed = Transformed.substr(0, pos);
1089    }
1090
1091    if (Transformed == ".")
1092    {
1093       Transformed = "";
1094    }
1095
1096    if (_config->FindB("Debug::pkgAcquire::Auth", false))
1097    {
1098       std::cerr << "Got Codename: " << MetaIndexParser->GetDist() << std::endl;
1099       std::cerr << "Expecting Dist: " << MetaIndexParser->GetExpectedDist() << std::endl;
1100       std::cerr << "Transformed Dist: " << Transformed << std::endl;
1101    }
1102
1103    if (MetaIndexParser->CheckDist(Transformed) == false)
1104    {
1105       // This might become fatal one day
1106 //       Status = StatAuthError;
1107 //       ErrorText = "Conflicting distribution; expected "
1108 //          + MetaIndexParser->GetExpectedDist() + " but got "
1109 //          + MetaIndexParser->GetDist();
1110 //       return false;
1111       if (!Transformed.empty())
1112       {
1113          _error->Warning("Conflicting distribution: %s (expected %s but got %s)",
1114                          Desc.Description.c_str(),
1115                          Transformed.c_str(),
1116                          MetaIndexParser->GetDist().c_str());
1117       }
1118    }
1119
1120    return true;
1121 }
1122                                                                 /*}}}*/
1123 // pkgAcqMetaIndex::Failed - no Release file present or no signature
1124 //      file present                                            /*{{{*/
1125 // ---------------------------------------------------------------------
1126 /* */
1127 void pkgAcqMetaIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
1128 {
1129    if (AuthPass == true)
1130    {
1131       // if we fail the authentication but got the file via a IMS-Hit
1132       // this means that the file wasn't downloaded and that it might be
1133       // just stale (server problem, proxy etc). we delete what we have
1134       // queue it again without i-m-s
1135       // alternatively we could just unlink the file and let the user try again
1136       if (IMSHit)
1137       {
1138          Complete = false;
1139          Local = false;
1140          AuthPass = false;
1141          unlink(DestFile.c_str());
1142
1143          DestFile = _config->FindDir("Dir::State::lists") + "partial/";
1144          DestFile += URItoFileName(RealURI);
1145          Desc.URI = RealURI;
1146          QueueURI(Desc);
1147          return;
1148       }
1149
1150       // gpgv method failed
1151       _error->Warning("GPG error: %s: %s",
1152                       Desc.Description.c_str(),
1153                       LookupTag(Message,"Message").c_str());
1154
1155    }
1156
1157    // No Release file was present, or verification failed, so fall
1158    // back to queueing Packages files without verification
1159    QueueIndexes(false);
1160 }
1161
1162                                                                         /*}}}*/
1163
1164 // AcqArchive::AcqArchive - Constructor                                 /*{{{*/
1165 // ---------------------------------------------------------------------
1166 /* This just sets up the initial fetch environment and queues the first
1167    possibilitiy */
1168 pkgAcqArchive::pkgAcqArchive(pkgAcquire *Owner,pkgSourceList *Sources,
1169                              pkgRecords *Recs,pkgCache::VerIterator const &Version,
1170                              string &StoreFilename) :
1171                Item(Owner), Version(Version), Sources(Sources), Recs(Recs),
1172                StoreFilename(StoreFilename), Vf(Version.FileList()),
1173                Trusted(false)
1174 {
1175    Retries = _config->FindI("Acquire::Retries",0);
1176
1177    if (Version.Arch() == 0)
1178    {
1179       _error->Error(_("I wasn't able to locate a file for the %s package. "
1180                       "This might mean you need to manually fix this package. "
1181                       "(due to missing arch)"),
1182                     Version.ParentPkg().Name());
1183       return;
1184    }
1185
1186    /* We need to find a filename to determine the extension. We make the
1187       assumption here that all the available sources for this version share
1188       the same extension.. */
1189    // Skip not source sources, they do not have file fields.
1190    for (; Vf.end() == false; Vf++)
1191    {
1192       if ((Vf.File()->Flags & pkgCache::Flag::NotSource) != 0)
1193          continue;
1194       break;
1195    }
1196
1197    // Does not really matter here.. we are going to fail out below
1198    if (Vf.end() != true)
1199    {
1200       // If this fails to get a file name we will bomb out below.
1201       pkgRecords::Parser &Parse = Recs->Lookup(Vf);
1202       if (_error->PendingError() == true)
1203          return;
1204
1205       // Generate the final file name as: package_version_arch.foo
1206       StoreFilename = QuoteString(Version.ParentPkg().Name(),"_:") + '_' +
1207                       QuoteString(Version.VerStr(),"_:") + '_' +
1208                       QuoteString(Version.Arch(),"_:.") +
1209                       "." + flExtension(Parse.FileName());
1210    }
1211
1212    // check if we have one trusted source for the package. if so, switch
1213    // to "TrustedOnly" mode
1214    for (pkgCache::VerFileIterator i = Version.FileList(); i.end() == false; i++)
1215    {
1216       pkgIndexFile *Index;
1217       if (Sources->FindIndex(i.File(),Index) == false)
1218          continue;
1219       if (_config->FindB("Debug::pkgAcquire::Auth", false))
1220       {
1221          std::cerr << "Checking index: " << Index->Describe()
1222                    << "(Trusted=" << Index->IsTrusted() << ")\n";
1223       }
1224       if (Index->IsTrusted()) {
1225          Trusted = true;
1226          break;
1227       }
1228    }
1229
1230    // "allow-unauthenticated" restores apts old fetching behaviour
1231    // that means that e.g. unauthenticated file:// uris are higher
1232    // priority than authenticated http:// uris
1233    if (_config->FindB("APT::Get::AllowUnauthenticated",false) == true)
1234       Trusted = false;
1235
1236    // Select a source
1237    if (QueueNext() == false && _error->PendingError() == false)
1238       _error->Error(_("I wasn't able to locate file for the %s package. "
1239                     "This might mean you need to manually fix this package."),
1240                     Version.ParentPkg().Name());
1241 }
1242                                                                         /*}}}*/
1243 // AcqArchive::QueueNext - Queue the next file source                   /*{{{*/
1244 // ---------------------------------------------------------------------
1245 /* This queues the next available file version for download. It checks if
1246    the archive is already available in the cache and stashs the MD5 for
1247    checking later. */
1248 bool pkgAcqArchive::QueueNext()
1249 {
1250    for (; Vf.end() == false; Vf++)
1251    {
1252       // Ignore not source sources
1253       if ((Vf.File()->Flags & pkgCache::Flag::NotSource) != 0)
1254          continue;
1255
1256       // Try to cross match against the source list
1257       pkgIndexFile *Index;
1258       if (Sources->FindIndex(Vf.File(),Index) == false)
1259             continue;
1260
1261       // only try to get a trusted package from another source if that source
1262       // is also trusted
1263       if(Trusted && !Index->IsTrusted())
1264          continue;
1265
1266       // Grab the text package record
1267       pkgRecords::Parser &Parse = Recs->Lookup(Vf);
1268       if (_error->PendingError() == true)
1269          return false;
1270
1271       string PkgFile = Parse.FileName();
1272       MD5 = Parse.MD5Hash();
1273       if (PkgFile.empty() == true)
1274          return _error->Error(_("The package index files are corrupted. No Filename: "
1275                               "field for package %s."),
1276                               Version.ParentPkg().Name());
1277
1278       Desc.URI = Index->ArchiveURI(PkgFile);
1279       Desc.Description = Index->ArchiveInfo(Version);
1280       Desc.Owner = this;
1281       Desc.ShortDesc = Version.ParentPkg().Name();
1282
1283       // See if we already have the file. (Legacy filenames)
1284       FileSize = Version->Size;
1285       string FinalFile = _config->FindDir("Dir::Cache::Archives") + flNotDir(PkgFile);
1286       struct stat Buf;
1287       if (stat(FinalFile.c_str(),&Buf) == 0)
1288       {
1289          // Make sure the size matches
1290          if ((unsigned)Buf.st_size == Version->Size)
1291          {
1292             Complete = true;
1293             Local = true;
1294             Status = StatDone;
1295             StoreFilename = DestFile = FinalFile;
1296             return true;
1297          }
1298
1299          /* Hmm, we have a file and its size does not match, this means it is
1300             an old style mismatched arch */
1301          unlink(FinalFile.c_str());
1302       }
1303
1304       // Check it again using the new style output filenames
1305       FinalFile = _config->FindDir("Dir::Cache::Archives") + flNotDir(StoreFilename);
1306       if (stat(FinalFile.c_str(),&Buf) == 0)
1307       {
1308          // Make sure the size matches
1309          if ((unsigned)Buf.st_size == Version->Size)
1310          {
1311             Complete = true;
1312             Local = true;
1313             Status = StatDone;
1314             StoreFilename = DestFile = FinalFile;
1315             return true;
1316          }
1317
1318          /* Hmm, we have a file and its size does not match, this shouldnt
1319             happen.. */
1320          unlink(FinalFile.c_str());
1321       }
1322
1323       DestFile = _config->FindDir("Dir::Cache::Archives") + "partial/" + flNotDir(StoreFilename);
1324
1325       // Check the destination file
1326       if (stat(DestFile.c_str(),&Buf) == 0)
1327       {
1328          // Hmm, the partial file is too big, erase it
1329          if ((unsigned)Buf.st_size > Version->Size)
1330             unlink(DestFile.c_str());
1331          else
1332             PartialSize = Buf.st_size;
1333       }
1334
1335       // Create the item
1336       Local = false;
1337       Desc.URI = Index->ArchiveURI(PkgFile);
1338       Desc.Description = Index->ArchiveInfo(Version);
1339       Desc.Owner = this;
1340       Desc.ShortDesc = Version.ParentPkg().Name();
1341       QueueURI(Desc);
1342
1343       Vf++;
1344       return true;
1345    }
1346    return false;
1347 }
1348                                                                         /*}}}*/
1349 // AcqArchive::Done - Finished fetching                                 /*{{{*/
1350 // ---------------------------------------------------------------------
1351 /* */
1352 void pkgAcqArchive::Done(string Message,unsigned long Size,string Md5Hash,
1353                          pkgAcquire::MethodConfig *Cfg)
1354 {
1355    Item::Done(Message,Size,Md5Hash,Cfg);
1356
1357    // Check the size
1358    if (Size != Version->Size)
1359    {
1360       Status = StatError;
1361       ErrorText = _("Size mismatch");
1362       return;
1363    }
1364
1365    // Check the md5
1366    if (Md5Hash.empty() == false && MD5.empty() == false)
1367    {
1368       if (Md5Hash != MD5)
1369       {
1370          Status = StatError;
1371          ErrorText = _("MD5Sum mismatch");
1372          if(FileExists(DestFile))
1373             Rename(DestFile,DestFile + ".FAILED");
1374          return;
1375       }
1376    }
1377
1378    // Grab the output filename
1379    string FileName = LookupTag(Message,"Filename");
1380    if (FileName.empty() == true)
1381    {
1382       Status = StatError;
1383       ErrorText = "Method gave a blank filename";
1384       return;
1385    }
1386
1387    Complete = true;
1388
1389    // Reference filename
1390    if (FileName != DestFile)
1391    {
1392       StoreFilename = DestFile = FileName;
1393       Local = true;
1394       return;
1395    }
1396
1397    // Done, move it into position
1398    string FinalFile = _config->FindDir("Dir::Cache::Archives");
1399    FinalFile += flNotDir(StoreFilename);
1400    Rename(DestFile,FinalFile);
1401
1402    StoreFilename = DestFile = FinalFile;
1403    Complete = true;
1404 }
1405                                                                         /*}}}*/
1406 // AcqArchive::Failed - Failure handler                                 /*{{{*/
1407 // ---------------------------------------------------------------------
1408 /* Here we try other sources */
1409 void pkgAcqArchive::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
1410 {
1411    ErrorText = LookupTag(Message,"Message");
1412
1413    /* We don't really want to retry on failed media swaps, this prevents
1414       that. An interesting observation is that permanent failures are not
1415       recorded. */
1416    if (Cnf->Removable == true &&
1417        StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
1418    {
1419       // Vf = Version.FileList();
1420       while (Vf.end() == false) Vf++;
1421       StoreFilename = string();
1422       Item::Failed(Message,Cnf);
1423       return;
1424    }
1425
1426    if (QueueNext() == false)
1427    {
1428       // This is the retry counter
1429       if (Retries != 0 &&
1430           Cnf->LocalOnly == false &&
1431           StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
1432       {
1433          Retries--;
1434          Vf = Version.FileList();
1435          if (QueueNext() == true)
1436             return;
1437       }
1438
1439       StoreFilename = string();
1440       Item::Failed(Message,Cnf);
1441    }
1442 }
1443                                                                         /*}}}*/
1444 // AcqArchive::IsTrusted - Determine whether this archive comes from a
1445 // trusted source                                                       /*{{{*/
1446 // ---------------------------------------------------------------------
1447 bool pkgAcqArchive::IsTrusted()
1448 {
1449    return Trusted;
1450 }
1451
1452 // AcqArchive::Finished - Fetching has finished, tidy up                /*{{{*/
1453 // ---------------------------------------------------------------------
1454 /* */
1455 void pkgAcqArchive::Finished()
1456 {
1457    if (Status == pkgAcquire::Item::StatDone &&
1458        Complete == true)
1459       return;
1460    StoreFilename = string();
1461 }
1462                                                                         /*}}}*/
1463
1464 // AcqFile::pkgAcqFile - Constructor                                    /*{{{*/
1465 // ---------------------------------------------------------------------
1466 /* The file is added to the queue */
1467 pkgAcqFile::pkgAcqFile(pkgAcquire *Owner,string URI,string MD5,
1468                        unsigned long Size,string Dsc,string ShortDesc,
1469                        const string &DestDir, const string &DestFilename) :
1470                        Item(Owner), Md5Hash(MD5)
1471 {
1472    Retries = _config->FindI("Acquire::Retries",0);
1473
1474    if(!DestFilename.empty())
1475       DestFile = DestFilename;
1476    else if(!DestDir.empty())
1477       DestFile = DestDir + "/" + flNotDir(URI);
1478    else
1479       DestFile = flNotDir(URI);
1480
1481    // Create the item
1482    Desc.URI = URI;
1483    Desc.Description = Dsc;
1484    Desc.Owner = this;
1485
1486    // Set the short description to the archive component
1487    Desc.ShortDesc = ShortDesc;
1488
1489    // Get the transfer sizes
1490    FileSize = Size;
1491    struct stat Buf;
1492    if (stat(DestFile.c_str(),&Buf) == 0)
1493    {
1494       // Hmm, the partial file is too big, erase it
1495       if ((unsigned)Buf.st_size > Size)
1496          unlink(DestFile.c_str());
1497       else
1498          PartialSize = Buf.st_size;
1499    }
1500
1501    QueueURI(Desc);
1502 }
1503                                                                         /*}}}*/
1504 // AcqFile::Done - Item downloaded OK                                   /*{{{*/
1505 // ---------------------------------------------------------------------
1506 /* */
1507 void pkgAcqFile::Done(string Message,unsigned long Size,string MD5,
1508                       pkgAcquire::MethodConfig *Cnf)
1509 {
1510    // Check the md5
1511    if (Md5Hash.empty() == false && MD5.empty() == false)
1512    {
1513       if (Md5Hash != MD5)
1514       {
1515          Status = StatError;
1516          ErrorText = "MD5Sum mismatch";
1517          Rename(DestFile,DestFile + ".FAILED");
1518          return;
1519       }
1520    }
1521
1522    Item::Done(Message,Size,MD5,Cnf);
1523
1524    string FileName = LookupTag(Message,"Filename");
1525    if (FileName.empty() == true)
1526    {
1527       Status = StatError;
1528       ErrorText = "Method gave a blank filename";
1529       return;
1530    }
1531
1532    Complete = true;
1533
1534    // The files timestamp matches
1535    if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
1536       return;
1537
1538    // We have to copy it into place
1539    if (FileName != DestFile)
1540    {
1541       Local = true;
1542       if (_config->FindB("Acquire::Source-Symlinks",true) == false ||
1543           Cnf->Removable == true)
1544       {
1545          Desc.URI = "copy:" + FileName;
1546          QueueURI(Desc);
1547          return;
1548       }
1549
1550       // Erase the file if it is a symlink so we can overwrite it
1551       struct stat St;
1552       if (lstat(DestFile.c_str(),&St) == 0)
1553       {
1554          if (S_ISLNK(St.st_mode) != 0)
1555             unlink(DestFile.c_str());
1556       }
1557
1558       // Symlink the file
1559       if (symlink(FileName.c_str(),DestFile.c_str()) != 0)
1560       {
1561          ErrorText = "Link to " + DestFile + " failure ";
1562          Status = StatError;
1563          Complete = false;
1564       }
1565    }
1566 }
1567                                                                         /*}}}*/
1568 // AcqFile::Failed - Failure handler                                    /*{{{*/
1569 // ---------------------------------------------------------------------
1570 /* Here we try other sources */
1571 void pkgAcqFile::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
1572 {
1573    ErrorText = LookupTag(Message,"Message");
1574
1575    // This is the retry counter
1576    if (Retries != 0 &&
1577        Cnf->LocalOnly == false &&
1578        StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
1579    {
1580       Retries--;
1581       QueueURI(Desc);
1582       return;
1583    }
1584
1585    Item::Failed(Message,Cnf);
1586 }
1587                                                                         /*}}}*/