methods/http.cc.orig

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
   4 /* ######################################################################
   5
   6    HTTP Aquire Method - This is the HTTP aquire method for APT.
   7
   8    It uses HTTP/1.1 and many of the fancy options there-in, such as
   9    pipelining, range, if-range and so on.
  10
  11    It is based on a doubly buffered select loop. A groupe of requests are
  12    fed into a single output buffer that is constantly fed out the
  13    socket. This provides ideal pipelining as in many cases all of the
  14    requests will fit into a single packet. The input socket is buffered
  15    the same way and fed into the fd for the file (may be a pipe in future).
  16
  17    This double buffering provides fairly substantial transfer rates,
  18    compared to wget the http method is about 4% faster. Most importantly,
  19    when HTTP is compared with FTP as a protocol the speed difference is
  20    huge. In tests over the internet from two sites to llug (via ATM) this
  21    program got 230k/s sustained http transfer rates. FTP on the other
  22    hand topped out at 170k/s. That combined with the time to setup the
  23    FTP connection makes HTTP a vastly superior protocol.
  24
  25    ##################################################################### */
  26                                                                         /*}}}*/
  27 // Include Files                                                        /*{{{*/
  28 #include <apt-pkg/fileutl.h>
  29 #include <apt-pkg/acquire-method.h>
  30 #include <apt-pkg/error.h>
  31 #include <apt-pkg/hashes.h>
  32
  33 #include <sys/sysctl.h>
  34 #include <sys/stat.h>
  35 #include <sys/time.h>
  36 #include <utime.h>
  37 #include <unistd.h>
  38 #include <signal.h>
  39 #include <stdio.h>
  40 #include <errno.h>
  41 #include <string.h>
  42 #include <iostream>
  43 #include <apti18n.h>
  44
  45 // Internet stuff
  46 #include <netdb.h>
  47 #include <arpa/inet.h>
  48
  49 #include <CoreFoundation/CoreFoundation.h>
  50 #include <CoreServices/CoreServices.h>
  51 #include <SystemConfiguration/SystemConfiguration.h>
  52
  53 #include "connect.h"
  54 #include "rfc2553emu.h"
  55 #include "http.h"
  56
  57                                                                         /*}}}*/
  58 using namespace std;
  59
  60 const char *Machine_;
  61 const char *SerialNumber_;
  62
  63 void CfrsError(const char *name, CFReadStreamRef rs) {
  64     CFStreamError se = CFReadStreamGetError(rs);
  65
  66     if (se.domain == kCFStreamErrorDomainCustom) {
  67     } else if (se.domain == kCFStreamErrorDomainPOSIX) {
  68         _error->Error("POSIX: %s", strerror(se.error));
  69     } else if (se.domain == kCFStreamErrorDomainMacOSStatus) {
  70         _error->Error("MacOSStatus: %ld", se.error);
  71     } else if (se.domain == kCFStreamErrorDomainNetDB) {
  72         _error->Error("NetDB: %s %s", name, gai_strerror(se.error));
  73     } else if (se.domain == kCFStreamErrorDomainMach) {
  74         _error->Error("Mach: %ld", se.error);
  75     } else if (se.domain == kCFStreamErrorDomainHTTP) {
  76         switch (se.error) {
  77             case kCFStreamErrorHTTPParseFailure:
  78                 _error->Error("Parse failure");
  79             break;
  80
  81             case kCFStreamErrorHTTPRedirectionLoop:
  82                 _error->Error("Redirection loop");
  83             break;
  84
  85             case kCFStreamErrorHTTPBadURL:
  86                 _error->Error("Bad URL");
  87             break;
  88
  89             default:
  90                 _error->Error("Unknown HTTP error: %ld", se.error);
  91             break;
  92         }
  93     } else if (se.domain == kCFStreamErrorDomainSOCKS) {
  94         _error->Error("SOCKS: %ld", se.error);
  95     } else if (se.domain == kCFStreamErrorDomainSystemConfiguration) {
  96         _error->Error("SystemConfiguration: %ld", se.error);
  97     } else if (se.domain == kCFStreamErrorDomainSSL) {
  98         _error->Error("SSL: %ld", se.error);
  99     } else {
 100         _error->Error("Domain #%ld: %ld", se.domain, se.error);
 101     }
 102 }
 103
 104 string HttpMethod::FailFile;
 105 int HttpMethod::FailFd = -1;
 106 time_t HttpMethod::FailTime = 0;
 107 unsigned long PipelineDepth = 10;
 108 unsigned long TimeOut = 120;
 109 bool Debug = false;
 110
 111 unsigned long CircleBuf::BwReadLimit=0;
 112 unsigned long CircleBuf::BwTickReadData=0;
 113 struct timeval CircleBuf::BwReadTick={0,0};
 114 const unsigned int CircleBuf::BW_HZ=10;
 115
 116 // CircleBuf::CircleBuf - Circular input buffer                         /*{{{*/
 117 // ---------------------------------------------------------------------
 118 /* */
 119 CircleBuf::CircleBuf(unsigned long Size) : Size(Size), Hash(0)
 120 {
 121    Buf = new unsigned char[Size];
 122    Reset();
 123
 124    CircleBuf::BwReadLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024;
 125 }
 126                                                                         /*}}}*/
 127 // CircleBuf::Reset - Reset to the default state                        /*{{{*/
 128 // ---------------------------------------------------------------------
 129 /* */
 130 void CircleBuf::Reset()
 131 {
 132    InP = 0;
 133    OutP = 0;
 134    StrPos = 0;
 135    MaxGet = (unsigned int)-1;
 136    OutQueue = string();
 137    if (Hash != 0)
 138    {
 139       delete Hash;
 140       Hash = new Hashes;
 141    }
 142 };
 143                                                                         /*}}}*/
 144 // CircleBuf::Read - Read from a FD into the circular buffer            /*{{{*/
 145 // ---------------------------------------------------------------------
 146 /* This fills up the buffer with as much data as is in the FD, assuming it
 147    is non-blocking.. */
 148 bool CircleBuf::Read(int Fd)
 149 {
 150    unsigned long BwReadMax;
 151
 152    while (1)
 153    {
 154       // Woops, buffer is full
 155       if (InP - OutP == Size)
 156          return true;
 157
 158       // what's left to read in this tick
 159       BwReadMax = CircleBuf::BwReadLimit/BW_HZ;
 160
 161       if(CircleBuf::BwReadLimit) {
 162          struct timeval now;
 163          gettimeofday(&now,0);
 164
 165          unsigned long d = (now.tv_sec-CircleBuf::BwReadTick.tv_sec)*1000000 +
 166             now.tv_usec-CircleBuf::BwReadTick.tv_usec;
 167          if(d > 1000000/BW_HZ) {
 168             CircleBuf::BwReadTick = now;
 169             CircleBuf::BwTickReadData = 0;
 170          }
 171
 172          if(CircleBuf::BwTickReadData >= BwReadMax) {
 173             usleep(1000000/BW_HZ);
 174             return true;
 175          }
 176       }
 177
 178       // Write the buffer segment
 179       int Res;
 180       if(CircleBuf::BwReadLimit) {
 181          Res = read(Fd,Buf + (InP%Size),
 182                     BwReadMax > LeftRead() ? LeftRead() : BwReadMax);
 183       } else
 184          Res = read(Fd,Buf + (InP%Size),LeftRead());
 185
 186       if(Res > 0 && BwReadLimit > 0)
 187          CircleBuf::BwTickReadData += Res;
 188
 189       if (Res == 0)
 190          return false;
 191       if (Res < 0)
 192       {
 193          if (errno == EAGAIN)
 194             return true;
 195          return false;
 196       }
 197
 198       if (InP == 0)
 199          gettimeofday(&Start,0);
 200       InP += Res;
 201    }
 202 }
 203                                                                         /*}}}*/
 204 // CircleBuf::Read - Put the string into the buffer                     /*{{{*/
 205 // ---------------------------------------------------------------------
 206 /* This will hold the string in and fill the buffer with it as it empties */
 207 bool CircleBuf::Read(string Data)
 208 {
 209    OutQueue += Data;
 210    FillOut();
 211    return true;
 212 }
 213                                                                         /*}}}*/
 214 // CircleBuf::FillOut - Fill the buffer from the output queue           /*{{{*/
 215 // ---------------------------------------------------------------------
 216 /* */
 217 void CircleBuf::FillOut()
 218 {
 219    if (OutQueue.empty() == true)
 220       return;
 221    while (1)
 222    {
 223       // Woops, buffer is full
 224       if (InP - OutP == Size)
 225          return;
 226
 227       // Write the buffer segment
 228       unsigned long Sz = LeftRead();
 229       if (OutQueue.length() - StrPos < Sz)
 230          Sz = OutQueue.length() - StrPos;
 231       memcpy(Buf + (InP%Size),OutQueue.c_str() + StrPos,Sz);
 232
 233       // Advance
 234       StrPos += Sz;
 235       InP += Sz;
 236       if (OutQueue.length() == StrPos)
 237       {
 238          StrPos = 0;
 239          OutQueue = "";
 240          return;
 241       }
 242    }
 243 }
 244                                                                         /*}}}*/
 245 // CircleBuf::Write - Write from the buffer into a FD                   /*{{{*/
 246 // ---------------------------------------------------------------------
 247 /* This empties the buffer into the FD. */
 248 bool CircleBuf::Write(int Fd)
 249 {
 250    while (1)
 251    {
 252       FillOut();
 253
 254       // Woops, buffer is empty
 255       if (OutP == InP)
 256          return true;
 257
 258       if (OutP == MaxGet)
 259          return true;
 260
 261       // Write the buffer segment
 262       int Res;
 263       Res = write(Fd,Buf + (OutP%Size),LeftWrite());
 264
 265       if (Res == 0)
 266          return false;
 267       if (Res < 0)
 268       {
 269          if (errno == EAGAIN)
 270             return true;
 271
 272          return false;
 273       }
 274
 275       if (Hash != 0)
 276          Hash->Add(Buf + (OutP%Size),Res);
 277
 278       OutP += Res;
 279    }
 280 }
 281                                                                         /*}}}*/
 282 // CircleBuf::WriteTillEl - Write from the buffer to a string           /*{{{*/
 283 // ---------------------------------------------------------------------
 284 /* This copies till the first empty line */
 285 bool CircleBuf::WriteTillEl(string &Data,bool Single)
 286 {
 287    // We cheat and assume it is unneeded to have more than one buffer load
 288    for (unsigned long I = OutP; I < InP; I++)
 289    {
 290       if (Buf[I%Size] != '\n')
 291          continue;
 292       ++I;
 293
 294       if (Single == false)
 295       {
 296          if (I < InP  && Buf[I%Size] == '\r')
 297             ++I;
 298          if (I >= InP || Buf[I%Size] != '\n')
 299             continue;
 300          ++I;
 301       }
 302
 303       Data = "";
 304       while (OutP < I)
 305       {
 306          unsigned long Sz = LeftWrite();
 307          if (Sz == 0)
 308             return false;
 309          if (I - OutP < Sz)
 310             Sz = I - OutP;
 311          Data += string((char *)(Buf + (OutP%Size)),Sz);
 312          OutP += Sz;
 313       }
 314       return true;
 315    }
 316    return false;
 317 }
 318                                                                         /*}}}*/
 319 // CircleBuf::Stats - Print out stats information                       /*{{{*/
 320 // ---------------------------------------------------------------------
 321 /* */
 322 void CircleBuf::Stats()
 323 {
 324    if (InP == 0)
 325       return;
 326
 327    struct timeval Stop;
 328    gettimeofday(&Stop,0);
 329 /*   float Diff = Stop.tv_sec - Start.tv_sec +
 330              (float)(Stop.tv_usec - Start.tv_usec)/1000000;
 331    clog << "Got " << InP << " in " << Diff << " at " << InP/Diff << endl;*/
 332 }
 333                                                                         /*}}}*/
 334
 335 // ServerState::ServerState - Constructor                               /*{{{*/
 336 // ---------------------------------------------------------------------
 337 /* */
 338 ServerState::ServerState(URI Srv,HttpMethod *Owner) : Owner(Owner),
 339                         In(64*1024), Out(4*1024),
 340                         ServerName(Srv)
 341 {
 342    Reset();
 343 }
 344                                                                         /*}}}*/
 345 // ServerState::Open - Open a connection to the server                  /*{{{*/
 346 // ---------------------------------------------------------------------
 347 /* This opens a connection to the server. */
 348 bool ServerState::Open()
 349 {
 350    // Use the already open connection if possible.
 351    if (ServerFd != -1)
 352       return true;
 353
 354    Close();
 355    In.Reset();
 356    Out.Reset();
 357    Persistent = true;
 358
 359    // Determine the proxy setting
 360    if (getenv("http_proxy") == 0)
 361    {
 362       string DefProxy = _config->Find("Acquire::http::Proxy");
 363       string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
 364       if (SpecificProxy.empty() == false)
 365       {
 366          if (SpecificProxy == "DIRECT")
 367             Proxy = "";
 368          else
 369             Proxy = SpecificProxy;
 370       }
 371       else
 372          Proxy = DefProxy;
 373    }
 374    else
 375       Proxy = getenv("http_proxy");
 376
 377    // Parse no_proxy, a , separated list of domains
 378    if (getenv("no_proxy") != 0)
 379    {
 380       if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
 381          Proxy = "";
 382    }
 383
 384    // Determine what host and port to use based on the proxy settings
 385    int Port = 0;
 386    string Host;
 387    if (Proxy.empty() == true || Proxy.Host.empty() == true)
 388    {
 389       if (ServerName.Port != 0)
 390          Port = ServerName.Port;
 391       Host = ServerName.Host;
 392    }
 393    else
 394    {
 395       if (Proxy.Port != 0)
 396          Port = Proxy.Port;
 397       Host = Proxy.Host;
 398    }
 399
 400    // Connect to the remote server
 401    if (Connect(Host,Port,"http",80,ServerFd,TimeOut,Owner) == false)
 402       return false;
 403
 404    return true;
 405 }
 406                                                                         /*}}}*/
 407 // ServerState::Close - Close a connection to the server                /*{{{*/
 408 // ---------------------------------------------------------------------
 409 /* */
 410 bool ServerState::Close()
 411 {
 412    close(ServerFd);
 413    ServerFd = -1;
 414    return true;
 415 }
 416                                                                         /*}}}*/
 417 // ServerState::RunHeaders - Get the headers before the data            /*{{{*/
 418 // ---------------------------------------------------------------------
 419 /* Returns 0 if things are OK, 1 if an IO error occursed and 2 if a header
 420    parse error occured */
 421 int ServerState::RunHeaders()
 422 {
 423    State = Header;
 424
 425    Owner->Status(_("Waiting for headers"));
 426
 427    Major = 0;
 428    Minor = 0;
 429    Result = 0;
 430    Size = 0;
 431    StartPos = 0;
 432    Encoding = Closes;
 433    HaveContent = false;
 434    time(&Date);
 435
 436    do
 437    {
 438       string Data;
 439       if (In.WriteTillEl(Data) == false)
 440          continue;
 441
 442       if (Debug == true)
 443          clog << Data;
 444
 445       for (string::const_iterator I = Data.begin(); I < Data.end(); I++)
 446       {
 447          string::const_iterator J = I;
 448          for (; J != Data.end() && *J != '\n' && *J != '\r';J++);
 449          if (HeaderLine(string(I,J)) == false)
 450             return 2;
 451          I = J;
 452       }
 453
 454       // 100 Continue is a Nop...
 455       if (Result == 100)
 456          continue;
 457
 458       // Tidy up the connection persistance state.
 459       if (Encoding == Closes && HaveContent == true)
 460          Persistent = false;
 461
 462       return 0;
 463    }
 464    while (Owner->Go(false,this) == true);
 465
 466    return 1;
 467 }
 468                                                                         /*}}}*/
 469 // ServerState::RunData - Transfer the data from the socket             /*{{{*/
 470 // ---------------------------------------------------------------------
 471 /* */
 472 bool ServerState::RunData()
 473 {
 474    State = Data;
 475
 476    // Chunked transfer encoding is fun..
 477    if (Encoding == Chunked)
 478    {
 479       while (1)
 480       {
 481          // Grab the block size
 482          bool Last = true;
 483          string Data;
 484          In.Limit(-1);
 485          do
 486          {
 487             if (In.WriteTillEl(Data,true) == true)
 488                break;
 489          }
 490          while ((Last = Owner->Go(false,this)) == true);
 491
 492          if (Last == false)
 493             return false;
 494
 495          // See if we are done
 496          unsigned long Len = strtol(Data.c_str(),0,16);
 497          if (Len == 0)
 498          {
 499             In.Limit(-1);
 500
 501             // We have to remove the entity trailer
 502             Last = true;
 503             do
 504             {
 505                if (In.WriteTillEl(Data,true) == true && Data.length() <= 2)
 506                   break;
 507             }
 508             while ((Last = Owner->Go(false,this)) == true);
 509             if (Last == false)
 510                return false;
 511             return !_error->PendingError();
 512          }
 513
 514          // Transfer the block
 515          In.Limit(Len);
 516          while (Owner->Go(true,this) == true)
 517             if (In.IsLimit() == true)
 518                break;
 519
 520          // Error
 521          if (In.IsLimit() == false)
 522             return false;
 523
 524          // The server sends an extra new line before the next block specifier..
 525          In.Limit(-1);
 526          Last = true;
 527          do
 528          {
 529             if (In.WriteTillEl(Data,true) == true)
 530                break;
 531          }
 532          while ((Last = Owner->Go(false,this)) == true);
 533          if (Last == false)
 534             return false;
 535       }
 536    }
 537    else
 538    {
 539       /* Closes encoding is used when the server did not specify a size, the
 540          loss of the connection means we are done */
 541       if (Encoding == Closes)
 542          In.Limit(-1);
 543       else
 544          In.Limit(Size - StartPos);
 545
 546       // Just transfer the whole block.
 547       do
 548       {
 549          if (In.IsLimit() == false)
 550             continue;
 551
 552          In.Limit(-1);
 553          return !_error->PendingError();
 554       }
 555       while (Owner->Go(true,this) == true);
 556    }
 557
 558    return Owner->Flush(this) && !_error->PendingError();
 559 }
 560                                                                         /*}}}*/
 561 // ServerState::HeaderLine - Process a header line                      /*{{{*/
 562 // ---------------------------------------------------------------------
 563 /* */
 564 bool ServerState::HeaderLine(string Line)
 565 {
 566    if (Line.empty() == true)
 567       return true;
 568
 569    // The http server might be trying to do something evil.
 570    if (Line.length() >= MAXLEN)
 571       return _error->Error(_("Got a single header line over %u chars"),MAXLEN);
 572
 573    string::size_type Pos = Line.find(' ');
 574    if (Pos == string::npos || Pos+1 > Line.length())
 575    {
 576       // Blah, some servers use "connection:closes", evil.
 577       Pos = Line.find(':');
 578       if (Pos == string::npos || Pos + 2 > Line.length())
 579          return _error->Error(_("Bad header line"));
 580       Pos++;
 581    }
 582
 583    // Parse off any trailing spaces between the : and the next word.
 584    string::size_type Pos2 = Pos;
 585    while (Pos2 < Line.length() && isspace(Line[Pos2]) != 0)
 586       Pos2++;
 587
 588    string Tag = string(Line,0,Pos);
 589    string Val = string(Line,Pos2);
 590
 591    if (stringcasecmp(Tag.c_str(),Tag.c_str()+4,"HTTP") == 0)
 592    {
 593       // Evil servers return no version
 594       if (Line[4] == '/')
 595       {
 596          if (sscanf(Line.c_str(),"HTTP/%u.%u %u %[^\n]",&Major,&Minor,
 597                     &Result,Code) != 4)
 598             return _error->Error(_("The HTTP server sent an invalid reply header"));
 599       }
 600       else
 601       {
 602          Major = 0;
 603          Minor = 9;
 604          if (sscanf(Line.c_str(),"HTTP %u %[^\n]",&Result,Code) != 2)
 605             return _error->Error(_("The HTTP server sent an invalid reply header"));
 606       }
 607
 608       /* Check the HTTP response header to get the default persistance
 609          state. */
 610       if (Major < 1)
 611          Persistent = false;
 612       else
 613       {
 614          if (Major == 1 && Minor <= 0)
 615             Persistent = false;
 616          else
 617             Persistent = true;
 618       }
 619
 620       return true;
 621    }
 622
 623    if (stringcasecmp(Tag,"Content-Length:") == 0)
 624    {
 625       if (Encoding == Closes)
 626          Encoding = Stream;
 627       HaveContent = true;
 628
 629       // The length is already set from the Content-Range header
 630       if (StartPos != 0)
 631          return true;
 632
 633       if (sscanf(Val.c_str(),"%lu",&Size) != 1)
 634          return _error->Error(_("The HTTP server sent an invalid Content-Length header"));
 635       return true;
 636    }
 637
 638    if (stringcasecmp(Tag,"Content-Type:") == 0)
 639    {
 640       HaveContent = true;
 641       return true;
 642    }
 643
 644    if (stringcasecmp(Tag,"Content-Range:") == 0)
 645    {
 646       HaveContent = true;
 647
 648       if (sscanf(Val.c_str(),"bytes %lu-%*u/%lu",&StartPos,&Size) != 2)
 649          return _error->Error(_("The HTTP server sent an invalid Content-Range header"));
 650       if ((unsigned)StartPos > Size)
 651          return _error->Error(_("This HTTP server has broken range support"));
 652       return true;
 653    }
 654
 655    if (stringcasecmp(Tag,"Transfer-Encoding:") == 0)
 656    {
 657       HaveContent = true;
 658       if (stringcasecmp(Val,"chunked") == 0)
 659          Encoding = Chunked;
 660       return true;
 661    }
 662
 663    if (stringcasecmp(Tag,"Connection:") == 0)
 664    {
 665       if (stringcasecmp(Val,"close") == 0)
 666          Persistent = false;
 667       if (stringcasecmp(Val,"keep-alive") == 0)
 668          Persistent = true;
 669       return true;
 670    }
 671
 672    if (stringcasecmp(Tag,"Last-Modified:") == 0)
 673    {
 674       if (StrToTime(Val,Date) == false)
 675          return _error->Error(_("Unknown date format"));
 676       return true;
 677    }
 678
 679    return true;
 680 }
 681                                                                         /*}}}*/
 682
 683 // HttpMethod::SendReq - Send the HTTP request                          /*{{{*/
 684 // ---------------------------------------------------------------------
 685 /* This places the http request in the outbound buffer */
 686 void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
 687 {
 688    URI Uri = Itm->Uri;
 689
 690    // The HTTP server expects a hostname with a trailing :port
 691    char Buf[1000];
 692    string ProperHost = Uri.Host;
 693    if (Uri.Port != 0)
 694    {
 695       sprintf(Buf,":%u",Uri.Port);
 696       ProperHost += Buf;
 697    }
 698
 699    // Just in case.
 700    if (Itm->Uri.length() >= sizeof(Buf))
 701        abort();
 702
 703    /* Build the request. We include a keep-alive header only for non-proxy
 704       requests. This is to tweak old http/1.0 servers that do support keep-alive
 705       but not HTTP/1.1 automatic keep-alive. Doing this with a proxy server
 706       will glitch HTTP/1.0 proxies because they do not filter it out and
 707       pass it on, HTTP/1.1 says the connection should default to keep alive
 708       and we expect the proxy to do this */
 709    if (Proxy.empty() == true || Proxy.Host.empty())
 710       sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\nConnection: keep-alive\r\n",
 711               QuoteString(Uri.Path,"~").c_str(),ProperHost.c_str());
 712    else
 713    {
 714       /* Generate a cache control header if necessary. We place a max
 715          cache age on index files, optionally set a no-cache directive
 716          and a no-store directive for archives. */
 717       sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\n",
 718               Itm->Uri.c_str(),ProperHost.c_str());
 719       // only generate a cache control header if we actually want to
 720       // use a cache
 721       if (_config->FindB("Acquire::http::No-Cache",false) == false)
 722       {
 723          if (Itm->IndexFile == true)
 724             sprintf(Buf+strlen(Buf),"Cache-Control: max-age=%u\r\n",
 725                     _config->FindI("Acquire::http::Max-Age",0));
 726          else
 727          {
 728             if (_config->FindB("Acquire::http::No-Store",false) == true)
 729                strcat(Buf,"Cache-Control: no-store\r\n");
 730          }
 731       }
 732    }
 733    // generate a no-cache header if needed
 734    if (_config->FindB("Acquire::http::No-Cache",false) == true)
 735       strcat(Buf,"Cache-Control: no-cache\r\nPragma: no-cache\r\n");
 736
 737
 738    string Req = Buf;
 739
 740    // Check for a partial file
 741    struct stat SBuf;
 742    if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
 743    {
 744       // In this case we send an if-range query with a range header
 745       sprintf(Buf,"Range: bytes=%li-\r\nIf-Range: %s\r\n",(long)SBuf.st_size - 1,
 746               TimeRFC1123(SBuf.st_mtime).c_str());
 747       Req += Buf;
 748    }
 749    else
 750    {
 751       if (Itm->LastModified != 0)
 752       {
 753          sprintf(Buf,"If-Modified-Since: %s\r\n",TimeRFC1123(Itm->LastModified).c_str());
 754          Req += Buf;
 755       }
 756    }
 757
 758    if (Proxy.User.empty() == false || Proxy.Password.empty() == false)
 759       Req += string("Proxy-Authorization: Basic ") +
 760           Base64Encode(Proxy.User + ":" + Proxy.Password) + "\r\n";
 761
 762    if (Uri.User.empty() == false || Uri.Password.empty() == false)
 763       Req += string("Authorization: Basic ") +
 764           Base64Encode(Uri.User + ":" + Uri.Password) + "\r\n";
 765
 766    Req += "User-Agent: Debian APT-HTTP/1.3\r\n\r\n";
 767
 768    if (Debug == true)
 769       cerr << Req << endl;
 770
 771    Out.Read(Req);
 772 }
 773                                                                         /*}}}*/
 774 // HttpMethod::Go - Run a single loop                                   /*{{{*/
 775 // ---------------------------------------------------------------------
 776 /* This runs the select loop over the server FDs, Output file FDs and
 777    stdin. */
 778 bool HttpMethod::Go(bool ToFile,ServerState *Srv)
 779 {
 780    // Server has closed the connection
 781    if (Srv->ServerFd == -1 && (Srv->In.WriteSpace() == false ||
 782                                ToFile == false))
 783       return false;
 784
 785    fd_set rfds,wfds;
 786    FD_ZERO(&rfds);
 787    FD_ZERO(&wfds);
 788
 789    /* Add the server. We only send more requests if the connection will
 790       be persisting */
 791    if (Srv->Out.WriteSpace() == true && Srv->ServerFd != -1
 792        && Srv->Persistent == true)
 793       FD_SET(Srv->ServerFd,&wfds);
 794    if (Srv->In.ReadSpace() == true && Srv->ServerFd != -1)
 795       FD_SET(Srv->ServerFd,&rfds);
 796
 797    // Add the file
 798    int FileFD = -1;
 799    if (File != 0)
 800       FileFD = File->Fd();
 801
 802    if (Srv->In.WriteSpace() == true && ToFile == true && FileFD != -1)
 803       FD_SET(FileFD,&wfds);
 804
 805    // Add stdin
 806    FD_SET(STDIN_FILENO,&rfds);
 807
 808    // Figure out the max fd
 809    int MaxFd = FileFD;
 810    if (MaxFd < Srv->ServerFd)
 811       MaxFd = Srv->ServerFd;
 812
 813    // Select
 814    struct timeval tv;
 815    tv.tv_sec = TimeOut;
 816    tv.tv_usec = 0;
 817    int Res = 0;
 818    if ((Res = select(MaxFd+1,&rfds,&wfds,0,&tv)) < 0)
 819    {
 820       if (errno == EINTR)
 821          return true;
 822       return _error->Errno("select",_("Select failed"));
 823    }
 824
 825    if (Res == 0)
 826    {
 827       _error->Error(_("Connection timed out"));
 828       return ServerDie(Srv);
 829    }
 830
 831    // Handle server IO
 832    if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&rfds))
 833    {
 834       errno = 0;
 835       if (Srv->In.Read(Srv->ServerFd) == false)
 836          return ServerDie(Srv);
 837    }
 838
 839    if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&wfds))
 840    {
 841       errno = 0;
 842       if (Srv->Out.Write(Srv->ServerFd) == false)
 843          return ServerDie(Srv);
 844    }
 845
 846    // Send data to the file
 847    if (FileFD != -1 && FD_ISSET(FileFD,&wfds))
 848    {
 849       if (Srv->In.Write(FileFD) == false)
 850          return _error->Errno("write",_("Error writing to output file"));
 851    }
 852
 853    // Handle commands from APT
 854    if (FD_ISSET(STDIN_FILENO,&rfds))
 855    {
 856       if (Run(true) != -1)
 857          exit(100);
 858    }
 859
 860    return true;
 861 }
 862                                                                         /*}}}*/
 863 // HttpMethod::Flush - Dump the buffer into the file                    /*{{{*/
 864 // ---------------------------------------------------------------------
 865 /* This takes the current input buffer from the Server FD and writes it
 866    into the file */
 867 bool HttpMethod::Flush(ServerState *Srv)
 868 {
 869    if (File != 0)
 870    {
 871       // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking
 872       // can't be set
 873       if (File->Name() != "/dev/null")
 874          SetNonBlock(File->Fd(),false);
 875       if (Srv->In.WriteSpace() == false)
 876          return true;
 877
 878       while (Srv->In.WriteSpace() == true)
 879       {
 880          if (Srv->In.Write(File->Fd()) == false)
 881             return _error->Errno("write",_("Error writing to file"));
 882          if (Srv->In.IsLimit() == true)
 883             return true;
 884       }
 885
 886       if (Srv->In.IsLimit() == true || Srv->Encoding == ServerState::Closes)
 887          return true;
 888    }
 889    return false;
 890 }
 891                                                                         /*}}}*/
 892 // HttpMethod::ServerDie - The server has closed the connection.        /*{{{*/
 893 // ---------------------------------------------------------------------
 894 /* */
 895 bool HttpMethod::ServerDie(ServerState *Srv)
 896 {
 897    unsigned int LErrno = errno;
 898
 899    // Dump the buffer to the file
 900    if (Srv->State == ServerState::Data)
 901    {
 902       // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking
 903       // can't be set
 904       if (File->Name() != "/dev/null")
 905          SetNonBlock(File->Fd(),false);
 906       while (Srv->In.WriteSpace() == true)
 907       {
 908          if (Srv->In.Write(File->Fd()) == false)
 909             return _error->Errno("write",_("Error writing to the file"));
 910
 911          // Done
 912          if (Srv->In.IsLimit() == true)
 913             return true;
 914       }
 915    }
 916
 917    // See if this is because the server finished the data stream
 918    if (Srv->In.IsLimit() == false && Srv->State != ServerState::Header &&
 919        Srv->Encoding != ServerState::Closes)
 920    {
 921       Srv->Close();
 922       if (LErrno == 0)
 923          return _error->Error(_("Error reading from server. Remote end closed connection"));
 924       errno = LErrno;
 925       return _error->Errno("read",_("Error reading from server"));
 926    }
 927    else
 928    {
 929       Srv->In.Limit(-1);
 930
 931       // Nothing left in the buffer
 932       if (Srv->In.WriteSpace() == false)
 933          return false;
 934
 935       // We may have got multiple responses back in one packet..
 936       Srv->Close();
 937       return true;
 938    }
 939
 940    return false;
 941 }
 942                                                                         /*}}}*/
 943 // HttpMethod::DealWithHeaders - Handle the retrieved header data       /*{{{*/
 944 // ---------------------------------------------------------------------
 945 /* We look at the header data we got back from the server and decide what
 946    to do. Returns
 947      0 - File is open,
 948      1 - IMS hit
 949      3 - Unrecoverable error
 950      4 - Error with error content page
 951      5 - Unrecoverable non-server error (close the connection) */
 952 int HttpMethod::DealWithHeaders(FetchResult &Res,ServerState *Srv)
 953 {
 954    // Not Modified
 955    if (Srv->Result == 304)
 956    {
 957       unlink(Queue->DestFile.c_str());
 958       Res.IMSHit = true;
 959       Res.LastModified = Queue->LastModified;
 960       return 1;
 961    }
 962
 963    /* We have a reply we dont handle. This should indicate a perm server
 964       failure */
 965    if (Srv->Result < 200 || Srv->Result >= 300)
 966    {
 967       _error->Error("%u %s",Srv->Result,Srv->Code);
 968       if (Srv->HaveContent == true)
 969          return 4;
 970       return 3;
 971    }
 972
 973    // This is some sort of 2xx 'data follows' reply
 974    Res.LastModified = Srv->Date;
 975    Res.Size = Srv->Size;
 976
 977    // Open the file
 978    delete File;
 979    File = new FileFd(Queue->DestFile,FileFd::WriteAny);
 980    if (_error->PendingError() == true)
 981       return 5;
 982
 983    FailFile = Queue->DestFile;
 984    FailFile.c_str();   // Make sure we dont do a malloc in the signal handler
 985    FailFd = File->Fd();
 986    FailTime = Srv->Date;
 987
 988    // Set the expected size
 989    if (Srv->StartPos >= 0)
 990    {
 991       Res.ResumePoint = Srv->StartPos;
 992       ftruncate(File->Fd(),Srv->StartPos);
 993    }
 994
 995    // Set the start point
 996    lseek(File->Fd(),0,SEEK_END);
 997
 998    delete Srv->In.Hash;
 999    Srv->In.Hash = new Hashes;
1000
1001    // Fill the Hash if the file is non-empty (resume)
1002    if (Srv->StartPos > 0)
1003    {
1004       lseek(File->Fd(),0,SEEK_SET);
1005       if (Srv->In.Hash->AddFD(File->Fd(),Srv->StartPos) == false)
1006       {
1007          _error->Errno("read",_("Problem hashing file"));
1008          return 5;
1009       }
1010       lseek(File->Fd(),0,SEEK_END);
1011    }
1012
1013    SetNonBlock(File->Fd(),true);
1014    return 0;
1015 }
1016                                                                         /*}}}*/
1017 // HttpMethod::SigTerm - Handle a fatal signal                          /*{{{*/
1018 // ---------------------------------------------------------------------
1019 /* This closes and timestamps the open file. This is neccessary to get
1020    resume behavoir on user abort */
1021 void HttpMethod::SigTerm(int)
1022 {
1023    if (FailFd == -1)
1024       _exit(100);
1025    close(FailFd);
1026
1027    // Timestamp
1028    struct utimbuf UBuf;
1029    UBuf.actime = FailTime;
1030    UBuf.modtime = FailTime;
1031    utime(FailFile.c_str(),&UBuf);
1032
1033    _exit(100);
1034 }
1035                                                                         /*}}}*/
1036 // HttpMethod::Fetch - Fetch an item                                    /*{{{*/
1037 // ---------------------------------------------------------------------
1038 /* This adds an item to the pipeline. We keep the pipeline at a fixed
1039    depth. */
1040 bool HttpMethod::Fetch(FetchItem *)
1041 {
1042    if (Server == 0)
1043       return true;
1044
1045    // Queue the requests
1046    int Depth = -1;
1047    bool Tail = false;
1048    for (FetchItem *I = Queue; I != 0 && Depth < (signed)PipelineDepth;
1049         I = I->Next, Depth++)
1050    {
1051       // If pipelining is disabled, we only queue 1 request
1052       if (Server->Pipeline == false && Depth >= 0)
1053          break;
1054
1055       // Make sure we stick with the same server
1056       if (Server->Comp(I->Uri) == false)
1057          break;
1058       if (QueueBack == I)
1059          Tail = true;
1060       if (Tail == true)
1061       {
1062          QueueBack = I->Next;
1063          SendReq(I,Server->Out);
1064          continue;
1065       }
1066    }
1067
1068    return true;
1069 };
1070                                                                         /*}}}*/
1071 // HttpMethod::Configuration - Handle a configuration message           /*{{{*/
1072 // ---------------------------------------------------------------------
1073 /* We stash the desired pipeline depth */
1074 bool HttpMethod::Configuration(string Message)
1075 {
1076    if (pkgAcqMethod::Configuration(Message) == false)
1077       return false;
1078
1079    TimeOut = _config->FindI("Acquire::http::Timeout",TimeOut);
1080    PipelineDepth = _config->FindI("Acquire::http::Pipeline-Depth",
1081                                   PipelineDepth);
1082    Debug = _config->FindB("Debug::Acquire::http",false);
1083
1084    return true;
1085 }
1086                                                                         /*}}}*/
1087 // HttpMethod::Loop - Main loop                                         /*{{{*/
1088 // ---------------------------------------------------------------------
1089 /* */
1090 int HttpMethod::Loop()
1091 {
1092    signal(SIGTERM,SigTerm);
1093    signal(SIGINT,SigTerm);
1094
1095    Server = 0;
1096
1097    int FailCounter = 0;
1098    while (1)
1099    {
1100       // We have no commands, wait for some to arrive
1101       if (Queue == 0)
1102       {
1103          if (WaitFd(STDIN_FILENO) == false)
1104             return 0;
1105       }
1106
1107       /* Run messages, we can accept 0 (no message) if we didn't
1108          do a WaitFd above.. Otherwise the FD is closed. */
1109       int Result = Run(true);
1110       if (Result != -1 && (Result != 0 || Queue == 0))
1111          return 100;
1112
1113       if (Queue == 0)
1114          continue;
1115
1116       CFStringEncoding se = kCFStringEncodingUTF8;
1117
1118       char *url = strdup(Queue->Uri.c_str());
1119     url:
1120       URI uri = std::string(url);
1121       std::string hs = uri.Host;
1122
1123       struct hostent *he = gethostbyname(hs.c_str());
1124       if (he == NULL || he->h_addr_list[0] == NULL) {
1125          _error->Error(hstrerror(h_errno));
1126          Fail(true);
1127          free(url);
1128       }
1129
1130       uri.Host = inet_ntoa(* (struct in_addr *) he->h_addr_list[0]);
1131
1132       std::string urs = uri;
1133
1134       CFStringRef sr = CFStringCreateWithCString(kCFAllocatorDefault, urs.c_str(), se);
1135       CFURLRef ur = CFURLCreateWithString(kCFAllocatorDefault, sr, NULL);
1136       CFRelease(sr);
1137       CFHTTPMessageRef hm = CFHTTPMessageCreateRequest(kCFAllocatorDefault, CFSTR("GET"), ur, kCFHTTPVersion1_1);
1138       CFRelease(ur);
1139
1140       struct stat SBuf;
1141       if (stat(Queue->DestFile.c_str(), &SBuf) >= 0 && SBuf.st_size > 0) {
1142          sr = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("bytes=%li-"), (long) SBuf.st_size - 1);
1143          CFHTTPMessageSetHeaderFieldValue(hm, CFSTR("Range"), sr);
1144          CFRelease(sr);
1145
1146          sr = CFStringCreateWithCString(kCFAllocatorDefault, TimeRFC1123(SBuf.st_mtime).c_str(), se);
1147          CFHTTPMessageSetHeaderFieldValue(hm, CFSTR("If-Range"), sr);
1148          CFRelease(sr);
1149       } else if (Queue->LastModified != 0) {
1150          sr = CFStringCreateWithCString(kCFAllocatorDefault, TimeRFC1123(SBuf.st_mtime).c_str(), se);
1151          CFHTTPMessageSetHeaderFieldValue(hm, CFSTR("If-Modified-Since"), sr);
1152          CFRelease(sr);
1153       }
1154
1155       sr = CFStringCreateWithCString(kCFAllocatorDefault, Machine_, se);
1156       CFHTTPMessageSetHeaderFieldValue(hm, CFSTR("X-Machine"), sr);
1157       CFRelease(sr);
1158
1159       sr = CFStringCreateWithCString(kCFAllocatorDefault, SerialNumber_, se);
1160       CFHTTPMessageSetHeaderFieldValue(hm, CFSTR("X-Serial-Number"), sr);
1161       CFRelease(sr);
1162
1163       CFHTTPMessageSetHeaderFieldValue(hm, CFSTR("User-Agent"), CFSTR("Telesphoreo APT-HTTP/1.0.98"));
1164
1165       sr = CFStringCreateWithCString(kCFAllocatorDefault, hs.c_str(), se);
1166       CFHTTPMessageSetHeaderFieldValue(hm, CFSTR("Host"), sr);
1167       CFRelease(sr);
1168
1169       CFReadStreamRef rs = CFReadStreamCreateForHTTPRequest(kCFAllocatorDefault, hm);
1170       CFRelease(hm);
1171
1172       CFDictionaryRef dr = SCDynamicStoreCopyProxies(NULL);
1173       CFReadStreamSetProperty(rs, kCFStreamPropertyHTTPProxy, dr);
1174       CFRelease(dr);
1175
1176       //CFReadStreamSetProperty(rs, kCFStreamPropertyHTTPShouldAutoredirect, kCFBooleanTrue);
1177       CFReadStreamSetProperty(rs, kCFStreamPropertyHTTPAttemptPersistentConnection, kCFBooleanTrue);
1178
1179       FetchResult Res;
1180       CFIndex rd;
1181       UInt32 sc;
1182
1183       uint8_t data[10240];
1184       size_t offset = 0;
1185
1186       Status("Connecting to %s", hs.c_str());
1187
1188       if (!CFReadStreamOpen(rs)) {
1189          CfrsError("Open", rs);
1190          Fail(true);
1191          goto done;
1192       }
1193
1194       rd = CFReadStreamRead(rs, data, sizeof(data));
1195
1196       if (rd == -1) {
1197          CfrsError(uri.Host.c_str(), rs);
1198          Fail(true);
1199          goto done;
1200       }
1201
1202       Res.Filename = Queue->DestFile;
1203
1204       hm = (CFHTTPMessageRef) CFReadStreamCopyProperty(rs, kCFStreamPropertyHTTPResponseHeader);
1205       sc = CFHTTPMessageGetResponseStatusCode(hm);
1206
1207       if (sc == 301 || sc == 302) {
1208          sr = CFHTTPMessageCopyHeaderFieldValue(hm, CFSTR("Location"));
1209          if (sr == NULL) {
1210             Fail();
1211             goto done_;
1212          } else {
1213             size_t ln = CFStringGetLength(sr) + 1;
1214             free(url);
1215             url = static_cast<char *>(malloc(ln));
1216
1217             if (!CFStringGetCString(sr, url, ln, se)) {
1218                Fail();
1219                goto done_;
1220             }
1221
1222             CFRelease(sr);
1223             goto url;
1224          }
1225       }
1226
1227       sr = CFHTTPMessageCopyHeaderFieldValue(hm, CFSTR("Content-Range"));
1228       if (sr != NULL) {
1229          size_t ln = CFStringGetLength(sr) + 1;
1230          char cr[ln];
1231
1232          if (!CFStringGetCString(sr, cr, ln, se)) {
1233             Fail();
1234             goto done_;
1235          }
1236
1237          CFRelease(sr);
1238
1239          if (sscanf(cr, "bytes %lu-%*u/%lu", &offset, &Res.Size) != 2) {
1240             _error->Error(_("The HTTP server sent an invalid Content-Range header"));
1241             Fail();
1242             goto done_;
1243          }
1244
1245          if (offset > Res.Size) {
1246             _error->Error(_("This HTTP server has broken range support"));
1247             Fail();
1248             goto done_;
1249          }
1250       } else {
1251          sr = CFHTTPMessageCopyHeaderFieldValue(hm, CFSTR("Content-Length"));
1252          if (sr != NULL) {
1253             Res.Size = CFStringGetIntValue(sr);
1254             CFRelease(sr);
1255          }
1256       }
1257
1258       time(&Res.LastModified);
1259
1260       sr = CFHTTPMessageCopyHeaderFieldValue(hm, CFSTR("Last-Modified"));
1261       if (sr != NULL) {
1262          size_t ln = CFStringGetLength(sr) + 1;
1263          char cr[ln];
1264
1265          if (!CFStringGetCString(sr, cr, ln, se)) {
1266             Fail();
1267             goto done_;
1268          }
1269
1270          CFRelease(sr);
1271
1272          if (!StrToTime(cr, Res.LastModified)) {
1273             _error->Error(_("Unknown date format"));
1274             Fail();
1275             goto done_;
1276          }
1277       }
1278
1279       CFRelease(hm);
1280
1281       if (sc == 304) {
1282          unlink(Queue->DestFile.c_str());
1283          Res.IMSHit = true;
1284          Res.LastModified = Queue->LastModified;
1285          URIDone(Res);
1286       } else if (sc < 200 || sc >= 300)
1287          Fail();
1288       else {
1289          Hashes hash;
1290
1291          File = new FileFd(Queue->DestFile, FileFd::WriteAny);
1292          if (_error->PendingError() == true) {
1293             delete File;
1294             File = NULL;
1295             Fail();
1296             goto done;
1297          }
1298
1299          FailFile = Queue->DestFile;
1300          FailFile.c_str();   // Make sure we dont do a malloc in the signal handler
1301          FailFd = File->Fd();
1302          FailTime = Res.LastModified;
1303
1304          Res.ResumePoint = offset;
1305          ftruncate(File->Fd(), offset);
1306
1307          if (offset != 0) {
1308             lseek(File->Fd(), 0, SEEK_SET);
1309             if (!hash.AddFD(File->Fd(), offset)) {
1310                _error->Errno("read", _("Problem hashing file"));
1311                delete File;
1312                File = NULL;
1313                Fail();
1314                goto done;
1315             }
1316          }
1317
1318          lseek(File->Fd(), 0, SEEK_END);
1319
1320          URIStart(Res);
1321
1322          read: if (rd == -1) {
1323             CfrsError("rd", rs);
1324             Fail(true);
1325          } else if (rd == 0) {
1326             if (Res.Size == 0)
1327                Res.Size = File->Size();
1328
1329             struct utimbuf UBuf;
1330             time(&UBuf.actime);
1331             UBuf.actime = Res.LastModified;
1332             UBuf.modtime = Res.LastModified;
1333             utime(Queue->DestFile.c_str(), &UBuf);
1334
1335             Res.TakeHashes(hash);
1336             URIDone(Res);
1337          } else {
1338             hash.Add(data, rd);
1339
1340             uint8_t *dt = data;
1341             while (rd != 0) {
1342                int sz = write(File->Fd(), dt, rd);
1343
1344                if (sz == -1) {
1345                    delete File;
1346                    File = NULL;
1347                    Fail();
1348                    goto done;
1349                }
1350
1351                dt += sz;
1352                rd -= sz;
1353             }
1354
1355             rd = CFReadStreamRead(rs, data, sizeof(data));
1356             goto read;
1357          }
1358       }
1359
1360      goto done;
1361     done_:
1362       CFRelease(hm);
1363     done:
1364       CFReadStreamClose(rs);
1365       CFRelease(rs);
1366       free(url);
1367
1368       FailCounter = 0;
1369    }
1370
1371    return 0;
1372 }
1373                                                                         /*}}}*/
1374
1375 int main()
1376 {
1377    setlocale(LC_ALL, "");
1378
1379    HttpMethod Mth;
1380
1381     size_t size;
1382     sysctlbyname("hw.machine", NULL, &size, NULL, 0);
1383     char *machine = new char[size];
1384     sysctlbyname("hw.machine", machine, &size, NULL, 0);
1385     Machine_ = machine;
1386
1387     if (CFMutableDictionaryRef dict = IOServiceMatching("IOPlatformExpertDevice"))
1388         if (io_service_t service = IOServiceGetMatchingService(kIOMasterPortDefault, dict)) {
1389             if (CFTypeRef serial = IORegistryEntryCreateCFProperty(service, CFSTR(kIOPlatformSerialNumberKey), kCFAllocatorDefault, 0)) {
1390                 SerialNumber_ = strdup(CFStringGetCStringPtr((CFStringRef) serial, CFStringGetSystemEncoding()));
1391                 CFRelease(serial);
1392             }
1393
1394             IOObjectRelease(service);
1395         }
1396
1397    return Mth.Loop();
1398 }
1399
1400