| 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 Acquire 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 <config.h> |
| 29 | |
| 30 | #include <apt-pkg/fileutl.h> |
| 31 | #include <apt-pkg/acquire-method.h> |
| 32 | #include <apt-pkg/configuration.h> |
| 33 | #include <apt-pkg/error.h> |
| 34 | #include <apt-pkg/hashes.h> |
| 35 | #include <apt-pkg/netrc.h> |
| 36 | |
| 37 | #include <sys/stat.h> |
| 38 | #include <sys/time.h> |
| 39 | #include <utime.h> |
| 40 | #include <unistd.h> |
| 41 | #include <signal.h> |
| 42 | #include <stdio.h> |
| 43 | #include <errno.h> |
| 44 | #include <string.h> |
| 45 | #include <climits> |
| 46 | #include <iostream> |
| 47 | #include <map> |
| 48 | |
| 49 | // Internet stuff |
| 50 | #include <netdb.h> |
| 51 | |
| 52 | #include "config.h" |
| 53 | #include "connect.h" |
| 54 | #include "rfc2553emu.h" |
| 55 | #include "http.h" |
| 56 | |
| 57 | #include <apti18n.h> |
| 58 | /*}}}*/ |
| 59 | using namespace std; |
| 60 | |
| 61 | string HttpMethod::FailFile; |
| 62 | int HttpMethod::FailFd = -1; |
| 63 | time_t HttpMethod::FailTime = 0; |
| 64 | unsigned long PipelineDepth = 0; |
| 65 | unsigned long TimeOut = 120; |
| 66 | bool AllowRedirect = false; |
| 67 | bool Debug = false; |
| 68 | URI Proxy; |
| 69 | |
| 70 | unsigned long long CircleBuf::BwReadLimit=0; |
| 71 | unsigned long long CircleBuf::BwTickReadData=0; |
| 72 | struct timeval CircleBuf::BwReadTick={0,0}; |
| 73 | const unsigned int CircleBuf::BW_HZ=10; |
| 74 | |
| 75 | // CircleBuf::CircleBuf - Circular input buffer /*{{{*/ |
| 76 | // --------------------------------------------------------------------- |
| 77 | /* */ |
| 78 | CircleBuf::CircleBuf(unsigned long long Size) : Size(Size), Hash(0) |
| 79 | { |
| 80 | Buf = new unsigned char[Size]; |
| 81 | Reset(); |
| 82 | |
| 83 | CircleBuf::BwReadLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024; |
| 84 | } |
| 85 | /*}}}*/ |
| 86 | // CircleBuf::Reset - Reset to the default state /*{{{*/ |
| 87 | // --------------------------------------------------------------------- |
| 88 | /* */ |
| 89 | void CircleBuf::Reset() |
| 90 | { |
| 91 | InP = 0; |
| 92 | OutP = 0; |
| 93 | StrPos = 0; |
| 94 | MaxGet = (unsigned long long)-1; |
| 95 | OutQueue = string(); |
| 96 | if (Hash != 0) |
| 97 | { |
| 98 | delete Hash; |
| 99 | Hash = new Hashes; |
| 100 | } |
| 101 | }; |
| 102 | /*}}}*/ |
| 103 | // CircleBuf::Read - Read from a FD into the circular buffer /*{{{*/ |
| 104 | // --------------------------------------------------------------------- |
| 105 | /* This fills up the buffer with as much data as is in the FD, assuming it |
| 106 | is non-blocking.. */ |
| 107 | bool CircleBuf::Read(int Fd) |
| 108 | { |
| 109 | unsigned long long BwReadMax; |
| 110 | |
| 111 | while (1) |
| 112 | { |
| 113 | // Woops, buffer is full |
| 114 | if (InP - OutP == Size) |
| 115 | return true; |
| 116 | |
| 117 | // what's left to read in this tick |
| 118 | BwReadMax = CircleBuf::BwReadLimit/BW_HZ; |
| 119 | |
| 120 | if(CircleBuf::BwReadLimit) { |
| 121 | struct timeval now; |
| 122 | gettimeofday(&now,0); |
| 123 | |
| 124 | unsigned long long d = (now.tv_sec-CircleBuf::BwReadTick.tv_sec)*1000000 + |
| 125 | now.tv_usec-CircleBuf::BwReadTick.tv_usec; |
| 126 | if(d > 1000000/BW_HZ) { |
| 127 | CircleBuf::BwReadTick = now; |
| 128 | CircleBuf::BwTickReadData = 0; |
| 129 | } |
| 130 | |
| 131 | if(CircleBuf::BwTickReadData >= BwReadMax) { |
| 132 | usleep(1000000/BW_HZ); |
| 133 | return true; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | // Write the buffer segment |
| 138 | ssize_t Res; |
| 139 | if(CircleBuf::BwReadLimit) { |
| 140 | Res = read(Fd,Buf + (InP%Size), |
| 141 | BwReadMax > LeftRead() ? LeftRead() : BwReadMax); |
| 142 | } else |
| 143 | Res = read(Fd,Buf + (InP%Size),LeftRead()); |
| 144 | |
| 145 | if(Res > 0 && BwReadLimit > 0) |
| 146 | CircleBuf::BwTickReadData += Res; |
| 147 | |
| 148 | if (Res == 0) |
| 149 | return false; |
| 150 | if (Res < 0) |
| 151 | { |
| 152 | if (errno == EAGAIN) |
| 153 | return true; |
| 154 | return false; |
| 155 | } |
| 156 | |
| 157 | if (InP == 0) |
| 158 | gettimeofday(&Start,0); |
| 159 | InP += Res; |
| 160 | } |
| 161 | } |
| 162 | /*}}}*/ |
| 163 | // CircleBuf::Read - Put the string into the buffer /*{{{*/ |
| 164 | // --------------------------------------------------------------------- |
| 165 | /* This will hold the string in and fill the buffer with it as it empties */ |
| 166 | bool CircleBuf::Read(string Data) |
| 167 | { |
| 168 | OutQueue += Data; |
| 169 | FillOut(); |
| 170 | return true; |
| 171 | } |
| 172 | /*}}}*/ |
| 173 | // CircleBuf::FillOut - Fill the buffer from the output queue /*{{{*/ |
| 174 | // --------------------------------------------------------------------- |
| 175 | /* */ |
| 176 | void CircleBuf::FillOut() |
| 177 | { |
| 178 | if (OutQueue.empty() == true) |
| 179 | return; |
| 180 | while (1) |
| 181 | { |
| 182 | // Woops, buffer is full |
| 183 | if (InP - OutP == Size) |
| 184 | return; |
| 185 | |
| 186 | // Write the buffer segment |
| 187 | unsigned long long Sz = LeftRead(); |
| 188 | if (OutQueue.length() - StrPos < Sz) |
| 189 | Sz = OutQueue.length() - StrPos; |
| 190 | memcpy(Buf + (InP%Size),OutQueue.c_str() + StrPos,Sz); |
| 191 | |
| 192 | // Advance |
| 193 | StrPos += Sz; |
| 194 | InP += Sz; |
| 195 | if (OutQueue.length() == StrPos) |
| 196 | { |
| 197 | StrPos = 0; |
| 198 | OutQueue = ""; |
| 199 | return; |
| 200 | } |
| 201 | } |
| 202 | } |
| 203 | /*}}}*/ |
| 204 | // CircleBuf::Write - Write from the buffer into a FD /*{{{*/ |
| 205 | // --------------------------------------------------------------------- |
| 206 | /* This empties the buffer into the FD. */ |
| 207 | bool CircleBuf::Write(int Fd) |
| 208 | { |
| 209 | while (1) |
| 210 | { |
| 211 | FillOut(); |
| 212 | |
| 213 | // Woops, buffer is empty |
| 214 | if (OutP == InP) |
| 215 | return true; |
| 216 | |
| 217 | if (OutP == MaxGet) |
| 218 | return true; |
| 219 | |
| 220 | // Write the buffer segment |
| 221 | ssize_t Res; |
| 222 | Res = write(Fd,Buf + (OutP%Size),LeftWrite()); |
| 223 | |
| 224 | if (Res == 0) |
| 225 | return false; |
| 226 | if (Res < 0) |
| 227 | { |
| 228 | if (errno == EAGAIN) |
| 229 | return true; |
| 230 | |
| 231 | return false; |
| 232 | } |
| 233 | |
| 234 | if (Hash != 0) |
| 235 | Hash->Add(Buf + (OutP%Size),Res); |
| 236 | |
| 237 | OutP += Res; |
| 238 | } |
| 239 | } |
| 240 | /*}}}*/ |
| 241 | // CircleBuf::WriteTillEl - Write from the buffer to a string /*{{{*/ |
| 242 | // --------------------------------------------------------------------- |
| 243 | /* This copies till the first empty line */ |
| 244 | bool CircleBuf::WriteTillEl(string &Data,bool Single) |
| 245 | { |
| 246 | // We cheat and assume it is unneeded to have more than one buffer load |
| 247 | for (unsigned long long I = OutP; I < InP; I++) |
| 248 | { |
| 249 | if (Buf[I%Size] != '\n') |
| 250 | continue; |
| 251 | ++I; |
| 252 | |
| 253 | if (Single == false) |
| 254 | { |
| 255 | if (I < InP && Buf[I%Size] == '\r') |
| 256 | ++I; |
| 257 | if (I >= InP || Buf[I%Size] != '\n') |
| 258 | continue; |
| 259 | ++I; |
| 260 | } |
| 261 | |
| 262 | Data = ""; |
| 263 | while (OutP < I) |
| 264 | { |
| 265 | unsigned long long Sz = LeftWrite(); |
| 266 | if (Sz == 0) |
| 267 | return false; |
| 268 | if (I - OutP < Sz) |
| 269 | Sz = I - OutP; |
| 270 | Data += string((char *)(Buf + (OutP%Size)),Sz); |
| 271 | OutP += Sz; |
| 272 | } |
| 273 | return true; |
| 274 | } |
| 275 | return false; |
| 276 | } |
| 277 | /*}}}*/ |
| 278 | // CircleBuf::Stats - Print out stats information /*{{{*/ |
| 279 | // --------------------------------------------------------------------- |
| 280 | /* */ |
| 281 | void CircleBuf::Stats() |
| 282 | { |
| 283 | if (InP == 0) |
| 284 | return; |
| 285 | |
| 286 | struct timeval Stop; |
| 287 | gettimeofday(&Stop,0); |
| 288 | /* float Diff = Stop.tv_sec - Start.tv_sec + |
| 289 | (float)(Stop.tv_usec - Start.tv_usec)/1000000; |
| 290 | clog << "Got " << InP << " in " << Diff << " at " << InP/Diff << endl;*/ |
| 291 | } |
| 292 | /*}}}*/ |
| 293 | CircleBuf::~CircleBuf() |
| 294 | { |
| 295 | delete [] Buf; |
| 296 | delete Hash; |
| 297 | } |
| 298 | |
| 299 | // ServerState::ServerState - Constructor /*{{{*/ |
| 300 | // --------------------------------------------------------------------- |
| 301 | /* */ |
| 302 | ServerState::ServerState(URI Srv,HttpMethod *Owner) : Owner(Owner), |
| 303 | In(64*1024), Out(4*1024), |
| 304 | ServerName(Srv) |
| 305 | { |
| 306 | Reset(); |
| 307 | } |
| 308 | /*}}}*/ |
| 309 | // ServerState::Open - Open a connection to the server /*{{{*/ |
| 310 | // --------------------------------------------------------------------- |
| 311 | /* This opens a connection to the server. */ |
| 312 | bool ServerState::Open() |
| 313 | { |
| 314 | // Use the already open connection if possible. |
| 315 | if (ServerFd != -1) |
| 316 | return true; |
| 317 | |
| 318 | Close(); |
| 319 | In.Reset(); |
| 320 | Out.Reset(); |
| 321 | Persistent = true; |
| 322 | |
| 323 | // Determine the proxy setting |
| 324 | string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host); |
| 325 | if (!SpecificProxy.empty()) |
| 326 | { |
| 327 | if (SpecificProxy == "DIRECT") |
| 328 | Proxy = ""; |
| 329 | else |
| 330 | Proxy = SpecificProxy; |
| 331 | } |
| 332 | else |
| 333 | { |
| 334 | string DefProxy = _config->Find("Acquire::http::Proxy"); |
| 335 | if (!DefProxy.empty()) |
| 336 | { |
| 337 | Proxy = DefProxy; |
| 338 | } |
| 339 | else |
| 340 | { |
| 341 | char* result = getenv("http_proxy"); |
| 342 | Proxy = result ? result : ""; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | // Parse no_proxy, a , separated list of domains |
| 347 | if (getenv("no_proxy") != 0) |
| 348 | { |
| 349 | if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true) |
| 350 | Proxy = ""; |
| 351 | } |
| 352 | |
| 353 | // Determine what host and port to use based on the proxy settings |
| 354 | int Port = 0; |
| 355 | string Host; |
| 356 | if (Proxy.empty() == true || Proxy.Host.empty() == true) |
| 357 | { |
| 358 | if (ServerName.Port != 0) |
| 359 | Port = ServerName.Port; |
| 360 | Host = ServerName.Host; |
| 361 | } |
| 362 | else |
| 363 | { |
| 364 | if (Proxy.Port != 0) |
| 365 | Port = Proxy.Port; |
| 366 | Host = Proxy.Host; |
| 367 | } |
| 368 | |
| 369 | // Connect to the remote server |
| 370 | if (Connect(Host,Port,"http",80,ServerFd,TimeOut,Owner) == false) |
| 371 | return false; |
| 372 | |
| 373 | return true; |
| 374 | } |
| 375 | /*}}}*/ |
| 376 | // ServerState::Close - Close a connection to the server /*{{{*/ |
| 377 | // --------------------------------------------------------------------- |
| 378 | /* */ |
| 379 | bool ServerState::Close() |
| 380 | { |
| 381 | close(ServerFd); |
| 382 | ServerFd = -1; |
| 383 | return true; |
| 384 | } |
| 385 | /*}}}*/ |
| 386 | // ServerState::RunHeaders - Get the headers before the data /*{{{*/ |
| 387 | // --------------------------------------------------------------------- |
| 388 | /* Returns 0 if things are OK, 1 if an IO error occurred and 2 if a header |
| 389 | parse error occurred */ |
| 390 | ServerState::RunHeadersResult ServerState::RunHeaders() |
| 391 | { |
| 392 | State = Header; |
| 393 | |
| 394 | Owner->Status(_("Waiting for headers")); |
| 395 | |
| 396 | Major = 0; |
| 397 | Minor = 0; |
| 398 | Result = 0; |
| 399 | Size = 0; |
| 400 | StartPos = 0; |
| 401 | Encoding = Closes; |
| 402 | HaveContent = false; |
| 403 | time(&Date); |
| 404 | |
| 405 | do |
| 406 | { |
| 407 | string Data; |
| 408 | if (In.WriteTillEl(Data) == false) |
| 409 | continue; |
| 410 | |
| 411 | if (Debug == true) |
| 412 | clog << Data; |
| 413 | |
| 414 | for (string::const_iterator I = Data.begin(); I < Data.end(); ++I) |
| 415 | { |
| 416 | string::const_iterator J = I; |
| 417 | for (; J != Data.end() && *J != '\n' && *J != '\r'; ++J); |
| 418 | if (HeaderLine(string(I,J)) == false) |
| 419 | return RUN_HEADERS_PARSE_ERROR; |
| 420 | I = J; |
| 421 | } |
| 422 | |
| 423 | // 100 Continue is a Nop... |
| 424 | if (Result == 100) |
| 425 | continue; |
| 426 | |
| 427 | // Tidy up the connection persistance state. |
| 428 | if (Encoding == Closes && HaveContent == true) |
| 429 | Persistent = false; |
| 430 | |
| 431 | return RUN_HEADERS_OK; |
| 432 | } |
| 433 | while (Owner->Go(false,this) == true); |
| 434 | |
| 435 | return RUN_HEADERS_IO_ERROR; |
| 436 | } |
| 437 | /*}}}*/ |
| 438 | // ServerState::RunData - Transfer the data from the socket /*{{{*/ |
| 439 | // --------------------------------------------------------------------- |
| 440 | /* */ |
| 441 | bool ServerState::RunData() |
| 442 | { |
| 443 | State = Data; |
| 444 | |
| 445 | // Chunked transfer encoding is fun.. |
| 446 | if (Encoding == Chunked) |
| 447 | { |
| 448 | while (1) |
| 449 | { |
| 450 | // Grab the block size |
| 451 | bool Last = true; |
| 452 | string Data; |
| 453 | In.Limit(-1); |
| 454 | do |
| 455 | { |
| 456 | if (In.WriteTillEl(Data,true) == true) |
| 457 | break; |
| 458 | } |
| 459 | while ((Last = Owner->Go(false,this)) == true); |
| 460 | |
| 461 | if (Last == false) |
| 462 | return false; |
| 463 | |
| 464 | // See if we are done |
| 465 | unsigned long long Len = strtoull(Data.c_str(),0,16); |
| 466 | if (Len == 0) |
| 467 | { |
| 468 | In.Limit(-1); |
| 469 | |
| 470 | // We have to remove the entity trailer |
| 471 | Last = true; |
| 472 | do |
| 473 | { |
| 474 | if (In.WriteTillEl(Data,true) == true && Data.length() <= 2) |
| 475 | break; |
| 476 | } |
| 477 | while ((Last = Owner->Go(false,this)) == true); |
| 478 | if (Last == false) |
| 479 | return false; |
| 480 | return !_error->PendingError(); |
| 481 | } |
| 482 | |
| 483 | // Transfer the block |
| 484 | In.Limit(Len); |
| 485 | while (Owner->Go(true,this) == true) |
| 486 | if (In.IsLimit() == true) |
| 487 | break; |
| 488 | |
| 489 | // Error |
| 490 | if (In.IsLimit() == false) |
| 491 | return false; |
| 492 | |
| 493 | // The server sends an extra new line before the next block specifier.. |
| 494 | In.Limit(-1); |
| 495 | Last = true; |
| 496 | do |
| 497 | { |
| 498 | if (In.WriteTillEl(Data,true) == true) |
| 499 | break; |
| 500 | } |
| 501 | while ((Last = Owner->Go(false,this)) == true); |
| 502 | if (Last == false) |
| 503 | return false; |
| 504 | } |
| 505 | } |
| 506 | else |
| 507 | { |
| 508 | /* Closes encoding is used when the server did not specify a size, the |
| 509 | loss of the connection means we are done */ |
| 510 | if (Encoding == Closes) |
| 511 | In.Limit(-1); |
| 512 | else |
| 513 | In.Limit(Size - StartPos); |
| 514 | |
| 515 | // Just transfer the whole block. |
| 516 | do |
| 517 | { |
| 518 | if (In.IsLimit() == false) |
| 519 | continue; |
| 520 | |
| 521 | In.Limit(-1); |
| 522 | return !_error->PendingError(); |
| 523 | } |
| 524 | while (Owner->Go(true,this) == true); |
| 525 | } |
| 526 | |
| 527 | return Owner->Flush(this) && !_error->PendingError(); |
| 528 | } |
| 529 | /*}}}*/ |
| 530 | // ServerState::HeaderLine - Process a header line /*{{{*/ |
| 531 | // --------------------------------------------------------------------- |
| 532 | /* */ |
| 533 | bool ServerState::HeaderLine(string Line) |
| 534 | { |
| 535 | if (Line.empty() == true) |
| 536 | return true; |
| 537 | |
| 538 | string::size_type Pos = Line.find(' '); |
| 539 | if (Pos == string::npos || Pos+1 > Line.length()) |
| 540 | { |
| 541 | // Blah, some servers use "connection:closes", evil. |
| 542 | Pos = Line.find(':'); |
| 543 | if (Pos == string::npos || Pos + 2 > Line.length()) |
| 544 | return _error->Error(_("Bad header line")); |
| 545 | Pos++; |
| 546 | } |
| 547 | |
| 548 | // Parse off any trailing spaces between the : and the next word. |
| 549 | string::size_type Pos2 = Pos; |
| 550 | while (Pos2 < Line.length() && isspace(Line[Pos2]) != 0) |
| 551 | Pos2++; |
| 552 | |
| 553 | string Tag = string(Line,0,Pos); |
| 554 | string Val = string(Line,Pos2); |
| 555 | |
| 556 | if (stringcasecmp(Tag.c_str(),Tag.c_str()+4,"HTTP") == 0) |
| 557 | { |
| 558 | // Evil servers return no version |
| 559 | if (Line[4] == '/') |
| 560 | { |
| 561 | int const elements = sscanf(Line.c_str(),"HTTP/%3u.%3u %3u%359[^\n]",&Major,&Minor,&Result,Code); |
| 562 | if (elements == 3) |
| 563 | { |
| 564 | Code[0] = '\0'; |
| 565 | if (Debug == true) |
| 566 | clog << "HTTP server doesn't give Reason-Phrase for " << Result << std::endl; |
| 567 | } |
| 568 | else if (elements != 4) |
| 569 | return _error->Error(_("The HTTP server sent an invalid reply header")); |
| 570 | } |
| 571 | else |
| 572 | { |
| 573 | Major = 0; |
| 574 | Minor = 9; |
| 575 | if (sscanf(Line.c_str(),"HTTP %3u%359[^\n]",&Result,Code) != 2) |
| 576 | return _error->Error(_("The HTTP server sent an invalid reply header")); |
| 577 | } |
| 578 | |
| 579 | /* Check the HTTP response header to get the default persistance |
| 580 | state. */ |
| 581 | if (Major < 1) |
| 582 | Persistent = false; |
| 583 | else |
| 584 | { |
| 585 | if (Major == 1 && Minor == 0) |
| 586 | Persistent = false; |
| 587 | else |
| 588 | Persistent = true; |
| 589 | } |
| 590 | |
| 591 | return true; |
| 592 | } |
| 593 | |
| 594 | if (stringcasecmp(Tag,"Content-Length:") == 0) |
| 595 | { |
| 596 | if (Encoding == Closes) |
| 597 | Encoding = Stream; |
| 598 | HaveContent = true; |
| 599 | |
| 600 | // The length is already set from the Content-Range header |
| 601 | if (StartPos != 0) |
| 602 | return true; |
| 603 | |
| 604 | Size = strtoull(Val.c_str(), NULL, 10); |
| 605 | if (Size >= std::numeric_limits<unsigned long long>::max()) |
| 606 | return _error->Errno("HeaderLine", _("The HTTP server sent an invalid Content-Length header")); |
| 607 | return true; |
| 608 | } |
| 609 | |
| 610 | if (stringcasecmp(Tag,"Content-Type:") == 0) |
| 611 | { |
| 612 | HaveContent = true; |
| 613 | return true; |
| 614 | } |
| 615 | |
| 616 | if (stringcasecmp(Tag,"Content-Range:") == 0) |
| 617 | { |
| 618 | HaveContent = true; |
| 619 | |
| 620 | if (sscanf(Val.c_str(),"bytes %llu-%*u/%llu",&StartPos,&Size) != 2) |
| 621 | return _error->Error(_("The HTTP server sent an invalid Content-Range header")); |
| 622 | if ((unsigned long long)StartPos > Size) |
| 623 | return _error->Error(_("This HTTP server has broken range support")); |
| 624 | return true; |
| 625 | } |
| 626 | |
| 627 | if (stringcasecmp(Tag,"Transfer-Encoding:") == 0) |
| 628 | { |
| 629 | HaveContent = true; |
| 630 | if (stringcasecmp(Val,"chunked") == 0) |
| 631 | Encoding = Chunked; |
| 632 | return true; |
| 633 | } |
| 634 | |
| 635 | if (stringcasecmp(Tag,"Connection:") == 0) |
| 636 | { |
| 637 | if (stringcasecmp(Val,"close") == 0) |
| 638 | Persistent = false; |
| 639 | if (stringcasecmp(Val,"keep-alive") == 0) |
| 640 | Persistent = true; |
| 641 | return true; |
| 642 | } |
| 643 | |
| 644 | if (stringcasecmp(Tag,"Last-Modified:") == 0) |
| 645 | { |
| 646 | if (RFC1123StrToTime(Val.c_str(), Date) == false) |
| 647 | return _error->Error(_("Unknown date format")); |
| 648 | return true; |
| 649 | } |
| 650 | |
| 651 | if (stringcasecmp(Tag,"Location:") == 0) |
| 652 | { |
| 653 | Location = Val; |
| 654 | return true; |
| 655 | } |
| 656 | |
| 657 | return true; |
| 658 | } |
| 659 | /*}}}*/ |
| 660 | |
| 661 | // HttpMethod::SendReq - Send the HTTP request /*{{{*/ |
| 662 | // --------------------------------------------------------------------- |
| 663 | /* This places the http request in the outbound buffer */ |
| 664 | void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out) |
| 665 | { |
| 666 | URI Uri = Itm->Uri; |
| 667 | |
| 668 | // The HTTP server expects a hostname with a trailing :port |
| 669 | char Buf[1000]; |
| 670 | string ProperHost; |
| 671 | |
| 672 | if (Uri.Host.find(':') != string::npos) |
| 673 | ProperHost = '[' + Uri.Host + ']'; |
| 674 | else |
| 675 | ProperHost = Uri.Host; |
| 676 | if (Uri.Port != 0) |
| 677 | { |
| 678 | sprintf(Buf,":%u",Uri.Port); |
| 679 | ProperHost += Buf; |
| 680 | } |
| 681 | |
| 682 | // Just in case. |
| 683 | if (Itm->Uri.length() >= sizeof(Buf)) |
| 684 | abort(); |
| 685 | |
| 686 | /* RFC 2616 §5.1.2 requires absolute URIs for requests to proxies, |
| 687 | but while its a must for all servers to accept absolute URIs, |
| 688 | it is assumed clients will sent an absolute path for non-proxies */ |
| 689 | std::string requesturi; |
| 690 | if (Proxy.empty() == true || Proxy.Host.empty()) |
| 691 | requesturi = Uri.Path; |
| 692 | else |
| 693 | requesturi = Itm->Uri; |
| 694 | |
| 695 | // The "+" is encoded as a workaround for a amazon S3 bug |
| 696 | // see LP bugs #1003633 and #1086997. |
| 697 | requesturi = QuoteString(requesturi, "+~ "); |
| 698 | |
| 699 | /* Build the request. No keep-alive is included as it is the default |
| 700 | in 1.1, can cause problems with proxies, and we are an HTTP/1.1 |
| 701 | client anyway. |
| 702 | C.f. https://tools.ietf.org/wg/httpbis/trac/ticket/158 */ |
| 703 | sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\n", |
| 704 | requesturi.c_str(),ProperHost.c_str()); |
| 705 | |
| 706 | // generate a cache control header (if needed) |
| 707 | if (_config->FindB("Acquire::http::No-Cache",false) == true) |
| 708 | { |
| 709 | strcat(Buf,"Cache-Control: no-cache\r\nPragma: no-cache\r\n"); |
| 710 | } |
| 711 | else |
| 712 | { |
| 713 | if (Itm->IndexFile == true) |
| 714 | { |
| 715 | sprintf(Buf+strlen(Buf),"Cache-Control: max-age=%u\r\n", |
| 716 | _config->FindI("Acquire::http::Max-Age",0)); |
| 717 | } |
| 718 | else |
| 719 | { |
| 720 | if (_config->FindB("Acquire::http::No-Store",false) == true) |
| 721 | strcat(Buf,"Cache-Control: no-store\r\n"); |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | // If we ask for uncompressed files servers might respond with content- |
| 726 | // negotation which lets us end up with compressed files we do not support, |
| 727 | // see 657029, 657560 and co, so if we have no extension on the request |
| 728 | // ask for text only. As a sidenote: If there is nothing to negotate servers |
| 729 | // seem to be nice and ignore it. |
| 730 | if (_config->FindB("Acquire::http::SendAccept", true) == true) |
| 731 | { |
| 732 | size_t const filepos = Itm->Uri.find_last_of('/'); |
| 733 | string const file = Itm->Uri.substr(filepos + 1); |
| 734 | if (flExtension(file) == file) |
| 735 | strcat(Buf,"Accept: text/*\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=%lli-\r\nIf-Range: %s\r\n",(long 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 | maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc")); |
| 763 | if (Uri.User.empty() == false || Uri.Password.empty() == false) |
| 764 | { |
| 765 | Req += string("Authorization: Basic ") + |
| 766 | Base64Encode(Uri.User + ":" + Uri.Password) + "\r\n"; |
| 767 | } |
| 768 | Req += "User-Agent: " + _config->Find("Acquire::http::User-Agent", |
| 769 | "Debian APT-HTTP/1.3 (" PACKAGE_VERSION ")") + "\r\n\r\n"; |
| 770 | |
| 771 | if (Debug == true) |
| 772 | cerr << Req << endl; |
| 773 | |
| 774 | Out.Read(Req); |
| 775 | } |
| 776 | /*}}}*/ |
| 777 | // HttpMethod::Go - Run a single loop /*{{{*/ |
| 778 | // --------------------------------------------------------------------- |
| 779 | /* This runs the select loop over the server FDs, Output file FDs and |
| 780 | stdin. */ |
| 781 | bool HttpMethod::Go(bool ToFile,ServerState *Srv) |
| 782 | { |
| 783 | // Server has closed the connection |
| 784 | if (Srv->ServerFd == -1 && (Srv->In.WriteSpace() == false || |
| 785 | ToFile == false)) |
| 786 | return false; |
| 787 | |
| 788 | fd_set rfds,wfds; |
| 789 | FD_ZERO(&rfds); |
| 790 | FD_ZERO(&wfds); |
| 791 | |
| 792 | /* Add the server. We only send more requests if the connection will |
| 793 | be persisting */ |
| 794 | if (Srv->Out.WriteSpace() == true && Srv->ServerFd != -1 |
| 795 | && Srv->Persistent == true) |
| 796 | FD_SET(Srv->ServerFd,&wfds); |
| 797 | if (Srv->In.ReadSpace() == true && Srv->ServerFd != -1) |
| 798 | FD_SET(Srv->ServerFd,&rfds); |
| 799 | |
| 800 | // Add the file |
| 801 | int FileFD = -1; |
| 802 | if (File != 0) |
| 803 | FileFD = File->Fd(); |
| 804 | |
| 805 | if (Srv->In.WriteSpace() == true && ToFile == true && FileFD != -1) |
| 806 | FD_SET(FileFD,&wfds); |
| 807 | |
| 808 | // Add stdin |
| 809 | if (_config->FindB("Acquire::http::DependOnSTDIN", true) == true) |
| 810 | FD_SET(STDIN_FILENO,&rfds); |
| 811 | |
| 812 | // Figure out the max fd |
| 813 | int MaxFd = FileFD; |
| 814 | if (MaxFd < Srv->ServerFd) |
| 815 | MaxFd = Srv->ServerFd; |
| 816 | |
| 817 | // Select |
| 818 | struct timeval tv; |
| 819 | tv.tv_sec = TimeOut; |
| 820 | tv.tv_usec = 0; |
| 821 | int Res = 0; |
| 822 | if ((Res = select(MaxFd+1,&rfds,&wfds,0,&tv)) < 0) |
| 823 | { |
| 824 | if (errno == EINTR) |
| 825 | return true; |
| 826 | return _error->Errno("select",_("Select failed")); |
| 827 | } |
| 828 | |
| 829 | if (Res == 0) |
| 830 | { |
| 831 | _error->Error(_("Connection timed out")); |
| 832 | return ServerDie(Srv); |
| 833 | } |
| 834 | |
| 835 | // Handle server IO |
| 836 | if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&rfds)) |
| 837 | { |
| 838 | errno = 0; |
| 839 | if (Srv->In.Read(Srv->ServerFd) == false) |
| 840 | return ServerDie(Srv); |
| 841 | } |
| 842 | |
| 843 | if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&wfds)) |
| 844 | { |
| 845 | errno = 0; |
| 846 | if (Srv->Out.Write(Srv->ServerFd) == false) |
| 847 | return ServerDie(Srv); |
| 848 | } |
| 849 | |
| 850 | // Send data to the file |
| 851 | if (FileFD != -1 && FD_ISSET(FileFD,&wfds)) |
| 852 | { |
| 853 | if (Srv->In.Write(FileFD) == false) |
| 854 | return _error->Errno("write",_("Error writing to output file")); |
| 855 | } |
| 856 | |
| 857 | // Handle commands from APT |
| 858 | if (FD_ISSET(STDIN_FILENO,&rfds)) |
| 859 | { |
| 860 | if (Run(true) != -1) |
| 861 | exit(100); |
| 862 | } |
| 863 | |
| 864 | return true; |
| 865 | } |
| 866 | /*}}}*/ |
| 867 | // HttpMethod::Flush - Dump the buffer into the file /*{{{*/ |
| 868 | // --------------------------------------------------------------------- |
| 869 | /* This takes the current input buffer from the Server FD and writes it |
| 870 | into the file */ |
| 871 | bool HttpMethod::Flush(ServerState *Srv) |
| 872 | { |
| 873 | if (File != 0) |
| 874 | { |
| 875 | // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking |
| 876 | // can't be set |
| 877 | if (File->Name() != "/dev/null") |
| 878 | SetNonBlock(File->Fd(),false); |
| 879 | if (Srv->In.WriteSpace() == false) |
| 880 | return true; |
| 881 | |
| 882 | while (Srv->In.WriteSpace() == true) |
| 883 | { |
| 884 | if (Srv->In.Write(File->Fd()) == false) |
| 885 | return _error->Errno("write",_("Error writing to file")); |
| 886 | if (Srv->In.IsLimit() == true) |
| 887 | return true; |
| 888 | } |
| 889 | |
| 890 | if (Srv->In.IsLimit() == true || Srv->Encoding == ServerState::Closes) |
| 891 | return true; |
| 892 | } |
| 893 | return false; |
| 894 | } |
| 895 | /*}}}*/ |
| 896 | // HttpMethod::ServerDie - The server has closed the connection. /*{{{*/ |
| 897 | // --------------------------------------------------------------------- |
| 898 | /* */ |
| 899 | bool HttpMethod::ServerDie(ServerState *Srv) |
| 900 | { |
| 901 | unsigned int LErrno = errno; |
| 902 | |
| 903 | // Dump the buffer to the file |
| 904 | if (Srv->State == ServerState::Data) |
| 905 | { |
| 906 | // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking |
| 907 | // can't be set |
| 908 | if (File->Name() != "/dev/null") |
| 909 | SetNonBlock(File->Fd(),false); |
| 910 | while (Srv->In.WriteSpace() == true) |
| 911 | { |
| 912 | if (Srv->In.Write(File->Fd()) == false) |
| 913 | return _error->Errno("write",_("Error writing to the file")); |
| 914 | |
| 915 | // Done |
| 916 | if (Srv->In.IsLimit() == true) |
| 917 | return true; |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | // See if this is because the server finished the data stream |
| 922 | if (Srv->In.IsLimit() == false && Srv->State != ServerState::Header && |
| 923 | Srv->Encoding != ServerState::Closes) |
| 924 | { |
| 925 | Srv->Close(); |
| 926 | if (LErrno == 0) |
| 927 | return _error->Error(_("Error reading from server. Remote end closed connection")); |
| 928 | errno = LErrno; |
| 929 | return _error->Errno("read",_("Error reading from server")); |
| 930 | } |
| 931 | else |
| 932 | { |
| 933 | Srv->In.Limit(-1); |
| 934 | |
| 935 | // Nothing left in the buffer |
| 936 | if (Srv->In.WriteSpace() == false) |
| 937 | return false; |
| 938 | |
| 939 | // We may have got multiple responses back in one packet.. |
| 940 | Srv->Close(); |
| 941 | return true; |
| 942 | } |
| 943 | |
| 944 | return false; |
| 945 | } |
| 946 | /*}}}*/ |
| 947 | // HttpMethod::DealWithHeaders - Handle the retrieved header data /*{{{*/ |
| 948 | // --------------------------------------------------------------------- |
| 949 | /* We look at the header data we got back from the server and decide what |
| 950 | to do. Returns DealWithHeadersResult (see http.h for details). |
| 951 | */ |
| 952 | HttpMethod::DealWithHeadersResult |
| 953 | HttpMethod::DealWithHeaders(FetchResult &Res,ServerState *Srv) |
| 954 | { |
| 955 | // Not Modified |
| 956 | if (Srv->Result == 304) |
| 957 | { |
| 958 | unlink(Queue->DestFile.c_str()); |
| 959 | Res.IMSHit = true; |
| 960 | Res.LastModified = Queue->LastModified; |
| 961 | return IMS_HIT; |
| 962 | } |
| 963 | |
| 964 | /* Redirect |
| 965 | * |
| 966 | * Note that it is only OK for us to treat all redirection the same |
| 967 | * because we *always* use GET, not other HTTP methods. There are |
| 968 | * three redirection codes for which it is not appropriate that we |
| 969 | * redirect. Pass on those codes so the error handling kicks in. |
| 970 | */ |
| 971 | if (AllowRedirect |
| 972 | && (Srv->Result > 300 && Srv->Result < 400) |
| 973 | && (Srv->Result != 300 // Multiple Choices |
| 974 | && Srv->Result != 304 // Not Modified |
| 975 | && Srv->Result != 306)) // (Not part of HTTP/1.1, reserved) |
| 976 | { |
| 977 | if (Srv->Location.empty() == true); |
| 978 | else if (Srv->Location[0] == '/' && Queue->Uri.empty() == false) |
| 979 | { |
| 980 | URI Uri = Queue->Uri; |
| 981 | if (Uri.Host.empty() == false) |
| 982 | NextURI = URI::SiteOnly(Uri); |
| 983 | else |
| 984 | NextURI.clear(); |
| 985 | NextURI.append(DeQuoteString(Srv->Location)); |
| 986 | return TRY_AGAIN_OR_REDIRECT; |
| 987 | } |
| 988 | else |
| 989 | { |
| 990 | NextURI = DeQuoteString(Srv->Location); |
| 991 | URI tmpURI = NextURI; |
| 992 | // Do not allow a redirection to switch protocol |
| 993 | if (tmpURI.Access == "http") |
| 994 | return TRY_AGAIN_OR_REDIRECT; |
| 995 | } |
| 996 | /* else pass through for error message */ |
| 997 | } |
| 998 | |
| 999 | /* We have a reply we dont handle. This should indicate a perm server |
| 1000 | failure */ |
| 1001 | if (Srv->Result < 200 || Srv->Result >= 300) |
| 1002 | { |
| 1003 | char err[255]; |
| 1004 | snprintf(err,sizeof(err)-1,"HttpError%i",Srv->Result); |
| 1005 | SetFailReason(err); |
| 1006 | _error->Error("%u %s",Srv->Result,Srv->Code); |
| 1007 | if (Srv->HaveContent == true) |
| 1008 | return ERROR_WITH_CONTENT_PAGE; |
| 1009 | return ERROR_UNRECOVERABLE; |
| 1010 | } |
| 1011 | |
| 1012 | // This is some sort of 2xx 'data follows' reply |
| 1013 | Res.LastModified = Srv->Date; |
| 1014 | Res.Size = Srv->Size; |
| 1015 | |
| 1016 | // Open the file |
| 1017 | delete File; |
| 1018 | File = new FileFd(Queue->DestFile,FileFd::WriteAny); |
| 1019 | if (_error->PendingError() == true) |
| 1020 | return ERROR_NOT_FROM_SERVER; |
| 1021 | |
| 1022 | FailFile = Queue->DestFile; |
| 1023 | FailFile.c_str(); // Make sure we dont do a malloc in the signal handler |
| 1024 | FailFd = File->Fd(); |
| 1025 | FailTime = Srv->Date; |
| 1026 | |
| 1027 | delete Srv->In.Hash; |
| 1028 | Srv->In.Hash = new Hashes; |
| 1029 | |
| 1030 | // Set the expected size and read file for the hashes |
| 1031 | if (Srv->StartPos >= 0) |
| 1032 | { |
| 1033 | Res.ResumePoint = Srv->StartPos; |
| 1034 | File->Truncate(Srv->StartPos); |
| 1035 | |
| 1036 | if (Srv->In.Hash->AddFD(*File,Srv->StartPos) == false) |
| 1037 | { |
| 1038 | _error->Errno("read",_("Problem hashing file")); |
| 1039 | return ERROR_NOT_FROM_SERVER; |
| 1040 | } |
| 1041 | } |
| 1042 | |
| 1043 | SetNonBlock(File->Fd(),true); |
| 1044 | return FILE_IS_OPEN; |
| 1045 | } |
| 1046 | /*}}}*/ |
| 1047 | // HttpMethod::SigTerm - Handle a fatal signal /*{{{*/ |
| 1048 | // --------------------------------------------------------------------- |
| 1049 | /* This closes and timestamps the open file. This is neccessary to get |
| 1050 | resume behavoir on user abort */ |
| 1051 | void HttpMethod::SigTerm(int) |
| 1052 | { |
| 1053 | if (FailFd == -1) |
| 1054 | _exit(100); |
| 1055 | close(FailFd); |
| 1056 | |
| 1057 | // Timestamp |
| 1058 | struct utimbuf UBuf; |
| 1059 | UBuf.actime = FailTime; |
| 1060 | UBuf.modtime = FailTime; |
| 1061 | utime(FailFile.c_str(),&UBuf); |
| 1062 | |
| 1063 | _exit(100); |
| 1064 | } |
| 1065 | /*}}}*/ |
| 1066 | // HttpMethod::Fetch - Fetch an item /*{{{*/ |
| 1067 | // --------------------------------------------------------------------- |
| 1068 | /* This adds an item to the pipeline. We keep the pipeline at a fixed |
| 1069 | depth. */ |
| 1070 | bool HttpMethod::Fetch(FetchItem *) |
| 1071 | { |
| 1072 | if (Server == 0) |
| 1073 | return true; |
| 1074 | |
| 1075 | // Queue the requests |
| 1076 | int Depth = -1; |
| 1077 | for (FetchItem *I = Queue; I != 0 && Depth < (signed)PipelineDepth; |
| 1078 | I = I->Next, Depth++) |
| 1079 | { |
| 1080 | // If pipelining is disabled, we only queue 1 request |
| 1081 | if (Server->Pipeline == false && Depth >= 0) |
| 1082 | break; |
| 1083 | |
| 1084 | // Make sure we stick with the same server |
| 1085 | if (Server->Comp(I->Uri) == false) |
| 1086 | break; |
| 1087 | if (QueueBack == I) |
| 1088 | { |
| 1089 | QueueBack = I->Next; |
| 1090 | SendReq(I,Server->Out); |
| 1091 | continue; |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | return true; |
| 1096 | }; |
| 1097 | /*}}}*/ |
| 1098 | // HttpMethod::Configuration - Handle a configuration message /*{{{*/ |
| 1099 | // --------------------------------------------------------------------- |
| 1100 | /* We stash the desired pipeline depth */ |
| 1101 | bool HttpMethod::Configuration(string Message) |
| 1102 | { |
| 1103 | if (pkgAcqMethod::Configuration(Message) == false) |
| 1104 | return false; |
| 1105 | |
| 1106 | AllowRedirect = _config->FindB("Acquire::http::AllowRedirect",true); |
| 1107 | TimeOut = _config->FindI("Acquire::http::Timeout",TimeOut); |
| 1108 | PipelineDepth = _config->FindI("Acquire::http::Pipeline-Depth", |
| 1109 | PipelineDepth); |
| 1110 | Debug = _config->FindB("Debug::Acquire::http",false); |
| 1111 | AutoDetectProxyCmd = _config->Find("Acquire::http::ProxyAutoDetect"); |
| 1112 | |
| 1113 | // Get the proxy to use |
| 1114 | AutoDetectProxy(); |
| 1115 | |
| 1116 | return true; |
| 1117 | } |
| 1118 | /*}}}*/ |
| 1119 | // HttpMethod::Loop - Main loop /*{{{*/ |
| 1120 | // --------------------------------------------------------------------- |
| 1121 | /* */ |
| 1122 | int HttpMethod::Loop() |
| 1123 | { |
| 1124 | typedef vector<string> StringVector; |
| 1125 | typedef vector<string>::iterator StringVectorIterator; |
| 1126 | map<string, StringVector> Redirected; |
| 1127 | |
| 1128 | signal(SIGTERM,SigTerm); |
| 1129 | signal(SIGINT,SigTerm); |
| 1130 | |
| 1131 | Server = 0; |
| 1132 | |
| 1133 | int FailCounter = 0; |
| 1134 | while (1) |
| 1135 | { |
| 1136 | // We have no commands, wait for some to arrive |
| 1137 | if (Queue == 0) |
| 1138 | { |
| 1139 | if (WaitFd(STDIN_FILENO) == false) |
| 1140 | return 0; |
| 1141 | } |
| 1142 | |
| 1143 | /* Run messages, we can accept 0 (no message) if we didn't |
| 1144 | do a WaitFd above.. Otherwise the FD is closed. */ |
| 1145 | int Result = Run(true); |
| 1146 | if (Result != -1 && (Result != 0 || Queue == 0)) |
| 1147 | { |
| 1148 | if(FailReason.empty() == false || |
| 1149 | _config->FindB("Acquire::http::DependOnSTDIN", true) == true) |
| 1150 | return 100; |
| 1151 | else |
| 1152 | return 0; |
| 1153 | } |
| 1154 | |
| 1155 | if (Queue == 0) |
| 1156 | continue; |
| 1157 | |
| 1158 | // Connect to the server |
| 1159 | if (Server == 0 || Server->Comp(Queue->Uri) == false) |
| 1160 | { |
| 1161 | delete Server; |
| 1162 | Server = new ServerState(Queue->Uri,this); |
| 1163 | } |
| 1164 | /* If the server has explicitly said this is the last connection |
| 1165 | then we pre-emptively shut down the pipeline and tear down |
| 1166 | the connection. This will speed up HTTP/1.0 servers a tad |
| 1167 | since we don't have to wait for the close sequence to |
| 1168 | complete */ |
| 1169 | if (Server->Persistent == false) |
| 1170 | Server->Close(); |
| 1171 | |
| 1172 | // Reset the pipeline |
| 1173 | if (Server->ServerFd == -1) |
| 1174 | QueueBack = Queue; |
| 1175 | |
| 1176 | // Connnect to the host |
| 1177 | if (Server->Open() == false) |
| 1178 | { |
| 1179 | Fail(true); |
| 1180 | delete Server; |
| 1181 | Server = 0; |
| 1182 | continue; |
| 1183 | } |
| 1184 | |
| 1185 | // Fill the pipeline. |
| 1186 | Fetch(0); |
| 1187 | |
| 1188 | // Fetch the next URL header data from the server. |
| 1189 | switch (Server->RunHeaders()) |
| 1190 | { |
| 1191 | case ServerState::RUN_HEADERS_OK: |
| 1192 | break; |
| 1193 | |
| 1194 | // The header data is bad |
| 1195 | case ServerState::RUN_HEADERS_PARSE_ERROR: |
| 1196 | { |
| 1197 | _error->Error(_("Bad header data")); |
| 1198 | Fail(true); |
| 1199 | RotateDNS(); |
| 1200 | continue; |
| 1201 | } |
| 1202 | |
| 1203 | // The server closed a connection during the header get.. |
| 1204 | default: |
| 1205 | case ServerState::RUN_HEADERS_IO_ERROR: |
| 1206 | { |
| 1207 | FailCounter++; |
| 1208 | _error->Discard(); |
| 1209 | Server->Close(); |
| 1210 | Server->Pipeline = false; |
| 1211 | |
| 1212 | if (FailCounter >= 2) |
| 1213 | { |
| 1214 | Fail(_("Connection failed"),true); |
| 1215 | FailCounter = 0; |
| 1216 | } |
| 1217 | |
| 1218 | RotateDNS(); |
| 1219 | continue; |
| 1220 | } |
| 1221 | }; |
| 1222 | |
| 1223 | // Decide what to do. |
| 1224 | FetchResult Res; |
| 1225 | Res.Filename = Queue->DestFile; |
| 1226 | switch (DealWithHeaders(Res,Server)) |
| 1227 | { |
| 1228 | // Ok, the file is Open |
| 1229 | case FILE_IS_OPEN: |
| 1230 | { |
| 1231 | URIStart(Res); |
| 1232 | |
| 1233 | // Run the data |
| 1234 | bool Result = Server->RunData(); |
| 1235 | |
| 1236 | /* If the server is sending back sizeless responses then fill in |
| 1237 | the size now */ |
| 1238 | if (Res.Size == 0) |
| 1239 | Res.Size = File->Size(); |
| 1240 | |
| 1241 | // Close the file, destroy the FD object and timestamp it |
| 1242 | FailFd = -1; |
| 1243 | delete File; |
| 1244 | File = 0; |
| 1245 | |
| 1246 | // Timestamp |
| 1247 | struct utimbuf UBuf; |
| 1248 | time(&UBuf.actime); |
| 1249 | UBuf.actime = Server->Date; |
| 1250 | UBuf.modtime = Server->Date; |
| 1251 | utime(Queue->DestFile.c_str(),&UBuf); |
| 1252 | |
| 1253 | // Send status to APT |
| 1254 | if (Result == true) |
| 1255 | { |
| 1256 | Res.TakeHashes(*Server->In.Hash); |
| 1257 | URIDone(Res); |
| 1258 | } |
| 1259 | else |
| 1260 | { |
| 1261 | if (Server->ServerFd == -1) |
| 1262 | { |
| 1263 | FailCounter++; |
| 1264 | _error->Discard(); |
| 1265 | Server->Close(); |
| 1266 | |
| 1267 | if (FailCounter >= 2) |
| 1268 | { |
| 1269 | Fail(_("Connection failed"),true); |
| 1270 | FailCounter = 0; |
| 1271 | } |
| 1272 | |
| 1273 | QueueBack = Queue; |
| 1274 | } |
| 1275 | else |
| 1276 | Fail(true); |
| 1277 | } |
| 1278 | break; |
| 1279 | } |
| 1280 | |
| 1281 | // IMS hit |
| 1282 | case IMS_HIT: |
| 1283 | { |
| 1284 | URIDone(Res); |
| 1285 | break; |
| 1286 | } |
| 1287 | |
| 1288 | // Hard server error, not found or something |
| 1289 | case ERROR_UNRECOVERABLE: |
| 1290 | { |
| 1291 | Fail(); |
| 1292 | break; |
| 1293 | } |
| 1294 | |
| 1295 | // Hard internal error, kill the connection and fail |
| 1296 | case ERROR_NOT_FROM_SERVER: |
| 1297 | { |
| 1298 | delete File; |
| 1299 | File = 0; |
| 1300 | |
| 1301 | Fail(); |
| 1302 | RotateDNS(); |
| 1303 | Server->Close(); |
| 1304 | break; |
| 1305 | } |
| 1306 | |
| 1307 | // We need to flush the data, the header is like a 404 w/ error text |
| 1308 | case ERROR_WITH_CONTENT_PAGE: |
| 1309 | { |
| 1310 | Fail(); |
| 1311 | |
| 1312 | // Send to content to dev/null |
| 1313 | File = new FileFd("/dev/null",FileFd::WriteExists); |
| 1314 | Server->RunData(); |
| 1315 | delete File; |
| 1316 | File = 0; |
| 1317 | break; |
| 1318 | } |
| 1319 | |
| 1320 | // Try again with a new URL |
| 1321 | case TRY_AGAIN_OR_REDIRECT: |
| 1322 | { |
| 1323 | // Clear rest of response if there is content |
| 1324 | if (Server->HaveContent) |
| 1325 | { |
| 1326 | File = new FileFd("/dev/null",FileFd::WriteExists); |
| 1327 | Server->RunData(); |
| 1328 | delete File; |
| 1329 | File = 0; |
| 1330 | } |
| 1331 | |
| 1332 | /* Detect redirect loops. No more redirects are allowed |
| 1333 | after the same URI is seen twice in a queue item. */ |
| 1334 | StringVector &R = Redirected[Queue->DestFile]; |
| 1335 | bool StopRedirects = false; |
| 1336 | if (R.empty() == true) |
| 1337 | R.push_back(Queue->Uri); |
| 1338 | else if (R[0] == "STOP" || R.size() > 10) |
| 1339 | StopRedirects = true; |
| 1340 | else |
| 1341 | { |
| 1342 | for (StringVectorIterator I = R.begin(); I != R.end(); ++I) |
| 1343 | if (Queue->Uri == *I) |
| 1344 | { |
| 1345 | R[0] = "STOP"; |
| 1346 | break; |
| 1347 | } |
| 1348 | |
| 1349 | R.push_back(Queue->Uri); |
| 1350 | } |
| 1351 | |
| 1352 | if (StopRedirects == false) |
| 1353 | Redirect(NextURI); |
| 1354 | else |
| 1355 | Fail(); |
| 1356 | |
| 1357 | break; |
| 1358 | } |
| 1359 | |
| 1360 | default: |
| 1361 | Fail(_("Internal error")); |
| 1362 | break; |
| 1363 | } |
| 1364 | |
| 1365 | FailCounter = 0; |
| 1366 | } |
| 1367 | |
| 1368 | return 0; |
| 1369 | } |
| 1370 | /*}}}*/ |
| 1371 | // HttpMethod::AutoDetectProxy - auto detect proxy /*{{{*/ |
| 1372 | // --------------------------------------------------------------------- |
| 1373 | /* */ |
| 1374 | bool HttpMethod::AutoDetectProxy() |
| 1375 | { |
| 1376 | if (AutoDetectProxyCmd.empty()) |
| 1377 | return true; |
| 1378 | |
| 1379 | if (Debug) |
| 1380 | clog << "Using auto proxy detect command: " << AutoDetectProxyCmd << endl; |
| 1381 | |
| 1382 | int Pipes[2] = {-1,-1}; |
| 1383 | if (pipe(Pipes) != 0) |
| 1384 | return _error->Errno("pipe", "Failed to create Pipe"); |
| 1385 | |
| 1386 | pid_t Process = ExecFork(); |
| 1387 | if (Process == 0) |
| 1388 | { |
| 1389 | close(Pipes[0]); |
| 1390 | dup2(Pipes[1],STDOUT_FILENO); |
| 1391 | SetCloseExec(STDOUT_FILENO,false); |
| 1392 | |
| 1393 | const char *Args[2]; |
| 1394 | Args[0] = AutoDetectProxyCmd.c_str(); |
| 1395 | Args[1] = 0; |
| 1396 | execv(Args[0],(char **)Args); |
| 1397 | cerr << "Failed to exec method " << Args[0] << endl; |
| 1398 | _exit(100); |
| 1399 | } |
| 1400 | char buf[512]; |
| 1401 | int InFd = Pipes[0]; |
| 1402 | close(Pipes[1]); |
| 1403 | int res = read(InFd, buf, sizeof(buf)-1); |
| 1404 | ExecWait(Process, "ProxyAutoDetect", true); |
| 1405 | |
| 1406 | if (res < 0) |
| 1407 | return _error->Errno("read", "Failed to read"); |
| 1408 | if (res == 0) |
| 1409 | return _error->Warning("ProxyAutoDetect returned no data"); |
| 1410 | |
| 1411 | // add trailing \0 |
| 1412 | buf[res] = 0; |
| 1413 | |
| 1414 | if (Debug) |
| 1415 | clog << "auto detect command returned: '" << buf << "'" << endl; |
| 1416 | |
| 1417 | if (strstr(buf, "http://") == buf) |
| 1418 | _config->Set("Acquire::http::proxy", _strstrip(buf)); |
| 1419 | |
| 1420 | return true; |
| 1421 | } |
| 1422 | /*}}}*/ |
| 1423 | |
| 1424 | |