| 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 acquire 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 | #include <apt-pkg/strutl.h> |
| 37 | #include <apt-pkg/proxy.h> |
| 38 | |
| 39 | #include <stddef.h> |
| 40 | #include <stdlib.h> |
| 41 | #include <sys/select.h> |
| 42 | #include <cstring> |
| 43 | #include <sys/stat.h> |
| 44 | #include <sys/time.h> |
| 45 | #include <unistd.h> |
| 46 | #include <stdio.h> |
| 47 | #include <errno.h> |
| 48 | #include <iostream> |
| 49 | #include <sstream> |
| 50 | |
| 51 | #include "config.h" |
| 52 | #include "connect.h" |
| 53 | #include "http.h" |
| 54 | |
| 55 | #include <apti18n.h> |
| 56 | /*}}}*/ |
| 57 | using namespace std; |
| 58 | |
| 59 | unsigned long long CircleBuf::BwReadLimit=0; |
| 60 | unsigned long long CircleBuf::BwTickReadData=0; |
| 61 | struct timeval CircleBuf::BwReadTick={0,0}; |
| 62 | const unsigned int CircleBuf::BW_HZ=10; |
| 63 | |
| 64 | // CircleBuf::CircleBuf - Circular input buffer /*{{{*/ |
| 65 | // --------------------------------------------------------------------- |
| 66 | /* */ |
| 67 | CircleBuf::CircleBuf(unsigned long long Size) |
| 68 | : Size(Size), Hash(NULL), TotalWriten(0) |
| 69 | { |
| 70 | Buf = new unsigned char[Size]; |
| 71 | Reset(); |
| 72 | |
| 73 | CircleBuf::BwReadLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024; |
| 74 | } |
| 75 | /*}}}*/ |
| 76 | // CircleBuf::Reset - Reset to the default state /*{{{*/ |
| 77 | // --------------------------------------------------------------------- |
| 78 | /* */ |
| 79 | void CircleBuf::Reset() |
| 80 | { |
| 81 | InP = 0; |
| 82 | OutP = 0; |
| 83 | StrPos = 0; |
| 84 | TotalWriten = 0; |
| 85 | MaxGet = (unsigned long long)-1; |
| 86 | OutQueue = string(); |
| 87 | if (Hash != NULL) |
| 88 | { |
| 89 | delete Hash; |
| 90 | Hash = NULL; |
| 91 | } |
| 92 | } |
| 93 | /*}}}*/ |
| 94 | // CircleBuf::Read - Read from a FD into the circular buffer /*{{{*/ |
| 95 | // --------------------------------------------------------------------- |
| 96 | /* This fills up the buffer with as much data as is in the FD, assuming it |
| 97 | is non-blocking.. */ |
| 98 | bool CircleBuf::Read(int Fd) |
| 99 | { |
| 100 | while (1) |
| 101 | { |
| 102 | // Woops, buffer is full |
| 103 | if (InP - OutP == Size) |
| 104 | return true; |
| 105 | |
| 106 | // what's left to read in this tick |
| 107 | unsigned long long const BwReadMax = CircleBuf::BwReadLimit/BW_HZ; |
| 108 | |
| 109 | if(CircleBuf::BwReadLimit) { |
| 110 | struct timeval now; |
| 111 | gettimeofday(&now,0); |
| 112 | |
| 113 | unsigned long long d = (now.tv_sec-CircleBuf::BwReadTick.tv_sec)*1000000 + |
| 114 | now.tv_usec-CircleBuf::BwReadTick.tv_usec; |
| 115 | if(d > 1000000/BW_HZ) { |
| 116 | CircleBuf::BwReadTick = now; |
| 117 | CircleBuf::BwTickReadData = 0; |
| 118 | } |
| 119 | |
| 120 | if(CircleBuf::BwTickReadData >= BwReadMax) { |
| 121 | usleep(1000000/BW_HZ); |
| 122 | return true; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | // Write the buffer segment |
| 127 | ssize_t Res; |
| 128 | if(CircleBuf::BwReadLimit) { |
| 129 | Res = read(Fd,Buf + (InP%Size), |
| 130 | BwReadMax > LeftRead() ? LeftRead() : BwReadMax); |
| 131 | } else |
| 132 | Res = read(Fd,Buf + (InP%Size),LeftRead()); |
| 133 | |
| 134 | if(Res > 0 && BwReadLimit > 0) |
| 135 | CircleBuf::BwTickReadData += Res; |
| 136 | |
| 137 | if (Res == 0) |
| 138 | return false; |
| 139 | if (Res < 0) |
| 140 | { |
| 141 | if (errno == EAGAIN) |
| 142 | return true; |
| 143 | return false; |
| 144 | } |
| 145 | |
| 146 | if (InP == 0) |
| 147 | gettimeofday(&Start,0); |
| 148 | InP += Res; |
| 149 | } |
| 150 | } |
| 151 | /*}}}*/ |
| 152 | // CircleBuf::Read - Put the string into the buffer /*{{{*/ |
| 153 | // --------------------------------------------------------------------- |
| 154 | /* This will hold the string in and fill the buffer with it as it empties */ |
| 155 | bool CircleBuf::Read(string Data) |
| 156 | { |
| 157 | OutQueue += Data; |
| 158 | FillOut(); |
| 159 | return true; |
| 160 | } |
| 161 | /*}}}*/ |
| 162 | // CircleBuf::FillOut - Fill the buffer from the output queue /*{{{*/ |
| 163 | // --------------------------------------------------------------------- |
| 164 | /* */ |
| 165 | void CircleBuf::FillOut() |
| 166 | { |
| 167 | if (OutQueue.empty() == true) |
| 168 | return; |
| 169 | while (1) |
| 170 | { |
| 171 | // Woops, buffer is full |
| 172 | if (InP - OutP == Size) |
| 173 | return; |
| 174 | |
| 175 | // Write the buffer segment |
| 176 | unsigned long long Sz = LeftRead(); |
| 177 | if (OutQueue.length() - StrPos < Sz) |
| 178 | Sz = OutQueue.length() - StrPos; |
| 179 | memcpy(Buf + (InP%Size),OutQueue.c_str() + StrPos,Sz); |
| 180 | |
| 181 | // Advance |
| 182 | StrPos += Sz; |
| 183 | InP += Sz; |
| 184 | if (OutQueue.length() == StrPos) |
| 185 | { |
| 186 | StrPos = 0; |
| 187 | OutQueue = ""; |
| 188 | return; |
| 189 | } |
| 190 | } |
| 191 | } |
| 192 | /*}}}*/ |
| 193 | // CircleBuf::Write - Write from the buffer into a FD /*{{{*/ |
| 194 | // --------------------------------------------------------------------- |
| 195 | /* This empties the buffer into the FD. */ |
| 196 | bool CircleBuf::Write(int Fd) |
| 197 | { |
| 198 | while (1) |
| 199 | { |
| 200 | FillOut(); |
| 201 | |
| 202 | // Woops, buffer is empty |
| 203 | if (OutP == InP) |
| 204 | return true; |
| 205 | |
| 206 | if (OutP == MaxGet) |
| 207 | return true; |
| 208 | |
| 209 | // Write the buffer segment |
| 210 | ssize_t Res; |
| 211 | Res = write(Fd,Buf + (OutP%Size),LeftWrite()); |
| 212 | |
| 213 | if (Res == 0) |
| 214 | return false; |
| 215 | if (Res < 0) |
| 216 | { |
| 217 | if (errno == EAGAIN) |
| 218 | return true; |
| 219 | |
| 220 | return false; |
| 221 | } |
| 222 | |
| 223 | TotalWriten += Res; |
| 224 | |
| 225 | if (Hash != NULL) |
| 226 | Hash->Add(Buf + (OutP%Size),Res); |
| 227 | |
| 228 | OutP += Res; |
| 229 | } |
| 230 | } |
| 231 | /*}}}*/ |
| 232 | // CircleBuf::WriteTillEl - Write from the buffer to a string /*{{{*/ |
| 233 | // --------------------------------------------------------------------- |
| 234 | /* This copies till the first empty line */ |
| 235 | bool CircleBuf::WriteTillEl(string &Data,bool Single) |
| 236 | { |
| 237 | // We cheat and assume it is unneeded to have more than one buffer load |
| 238 | for (unsigned long long I = OutP; I < InP; I++) |
| 239 | { |
| 240 | if (Buf[I%Size] != '\n') |
| 241 | continue; |
| 242 | ++I; |
| 243 | |
| 244 | if (Single == false) |
| 245 | { |
| 246 | if (I < InP && Buf[I%Size] == '\r') |
| 247 | ++I; |
| 248 | if (I >= InP || Buf[I%Size] != '\n') |
| 249 | continue; |
| 250 | ++I; |
| 251 | } |
| 252 | |
| 253 | Data = ""; |
| 254 | while (OutP < I) |
| 255 | { |
| 256 | unsigned long long Sz = LeftWrite(); |
| 257 | if (Sz == 0) |
| 258 | return false; |
| 259 | if (I - OutP < Sz) |
| 260 | Sz = I - OutP; |
| 261 | Data += string((char *)(Buf + (OutP%Size)),Sz); |
| 262 | OutP += Sz; |
| 263 | } |
| 264 | return true; |
| 265 | } |
| 266 | return false; |
| 267 | } |
| 268 | /*}}}*/ |
| 269 | // CircleBuf::Stats - Print out stats information /*{{{*/ |
| 270 | // --------------------------------------------------------------------- |
| 271 | /* */ |
| 272 | void CircleBuf::Stats() |
| 273 | { |
| 274 | if (InP == 0) |
| 275 | return; |
| 276 | |
| 277 | struct timeval Stop; |
| 278 | gettimeofday(&Stop,0); |
| 279 | /* float Diff = Stop.tv_sec - Start.tv_sec + |
| 280 | (float)(Stop.tv_usec - Start.tv_usec)/1000000; |
| 281 | clog << "Got " << InP << " in " << Diff << " at " << InP/Diff << endl;*/ |
| 282 | } |
| 283 | /*}}}*/ |
| 284 | CircleBuf::~CircleBuf() |
| 285 | { |
| 286 | delete [] Buf; |
| 287 | delete Hash; |
| 288 | } |
| 289 | |
| 290 | // HttpServerState::HttpServerState - Constructor /*{{{*/ |
| 291 | HttpServerState::HttpServerState(URI Srv,HttpMethod *Owner) : ServerState(Srv, Owner), In(64*1024), Out(4*1024) |
| 292 | { |
| 293 | TimeOut = _config->FindI("Acquire::http::Timeout",TimeOut); |
| 294 | Reset(); |
| 295 | } |
| 296 | /*}}}*/ |
| 297 | // HttpServerState::Open - Open a connection to the server /*{{{*/ |
| 298 | // --------------------------------------------------------------------- |
| 299 | /* This opens a connection to the server. */ |
| 300 | bool HttpServerState::Open() |
| 301 | { |
| 302 | // Use the already open connection if possible. |
| 303 | if (ServerFd != -1) |
| 304 | return true; |
| 305 | |
| 306 | Close(); |
| 307 | In.Reset(); |
| 308 | Out.Reset(); |
| 309 | Persistent = true; |
| 310 | |
| 311 | // Determine the proxy setting |
| 312 | AutoDetectProxy(ServerName); |
| 313 | string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host); |
| 314 | if (!SpecificProxy.empty()) |
| 315 | { |
| 316 | if (SpecificProxy == "DIRECT") |
| 317 | Proxy = ""; |
| 318 | else |
| 319 | Proxy = SpecificProxy; |
| 320 | } |
| 321 | else |
| 322 | { |
| 323 | string DefProxy = _config->Find("Acquire::http::Proxy"); |
| 324 | if (!DefProxy.empty()) |
| 325 | { |
| 326 | Proxy = DefProxy; |
| 327 | } |
| 328 | else |
| 329 | { |
| 330 | char* result = getenv("http_proxy"); |
| 331 | Proxy = result ? result : ""; |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | // Parse no_proxy, a , separated list of domains |
| 336 | if (getenv("no_proxy") != 0) |
| 337 | { |
| 338 | if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true) |
| 339 | Proxy = ""; |
| 340 | } |
| 341 | |
| 342 | // Determine what host and port to use based on the proxy settings |
| 343 | int Port = 0; |
| 344 | string Host; |
| 345 | if (Proxy.empty() == true || Proxy.Host.empty() == true) |
| 346 | { |
| 347 | if (ServerName.Port != 0) |
| 348 | Port = ServerName.Port; |
| 349 | Host = ServerName.Host; |
| 350 | } |
| 351 | else |
| 352 | { |
| 353 | if (Proxy.Port != 0) |
| 354 | Port = Proxy.Port; |
| 355 | Host = Proxy.Host; |
| 356 | } |
| 357 | |
| 358 | // Connect to the remote server |
| 359 | if (Connect(Host,Port,"http",80,ServerFd,TimeOut,Owner) == false) |
| 360 | return false; |
| 361 | |
| 362 | return true; |
| 363 | } |
| 364 | /*}}}*/ |
| 365 | // HttpServerState::Close - Close a connection to the server /*{{{*/ |
| 366 | // --------------------------------------------------------------------- |
| 367 | /* */ |
| 368 | bool HttpServerState::Close() |
| 369 | { |
| 370 | close(ServerFd); |
| 371 | ServerFd = -1; |
| 372 | return true; |
| 373 | } |
| 374 | /*}}}*/ |
| 375 | // HttpServerState::RunData - Transfer the data from the socket /*{{{*/ |
| 376 | bool HttpServerState::RunData(FileFd * const File) |
| 377 | { |
| 378 | State = Data; |
| 379 | |
| 380 | // Chunked transfer encoding is fun.. |
| 381 | if (Encoding == Chunked) |
| 382 | { |
| 383 | while (1) |
| 384 | { |
| 385 | // Grab the block size |
| 386 | bool Last = true; |
| 387 | string Data; |
| 388 | In.Limit(-1); |
| 389 | do |
| 390 | { |
| 391 | if (In.WriteTillEl(Data,true) == true) |
| 392 | break; |
| 393 | } |
| 394 | while ((Last = Go(false, File)) == true); |
| 395 | |
| 396 | if (Last == false) |
| 397 | return false; |
| 398 | |
| 399 | // See if we are done |
| 400 | unsigned long long Len = strtoull(Data.c_str(),0,16); |
| 401 | if (Len == 0) |
| 402 | { |
| 403 | In.Limit(-1); |
| 404 | |
| 405 | // We have to remove the entity trailer |
| 406 | Last = true; |
| 407 | do |
| 408 | { |
| 409 | if (In.WriteTillEl(Data,true) == true && Data.length() <= 2) |
| 410 | break; |
| 411 | } |
| 412 | while ((Last = Go(false, File)) == true); |
| 413 | if (Last == false) |
| 414 | return false; |
| 415 | return !_error->PendingError(); |
| 416 | } |
| 417 | |
| 418 | // Transfer the block |
| 419 | In.Limit(Len); |
| 420 | while (Go(true, File) == true) |
| 421 | if (In.IsLimit() == true) |
| 422 | break; |
| 423 | |
| 424 | // Error |
| 425 | if (In.IsLimit() == false) |
| 426 | return false; |
| 427 | |
| 428 | // The server sends an extra new line before the next block specifier.. |
| 429 | In.Limit(-1); |
| 430 | Last = true; |
| 431 | do |
| 432 | { |
| 433 | if (In.WriteTillEl(Data,true) == true) |
| 434 | break; |
| 435 | } |
| 436 | while ((Last = Go(false, File)) == true); |
| 437 | if (Last == false) |
| 438 | return false; |
| 439 | } |
| 440 | } |
| 441 | else |
| 442 | { |
| 443 | /* Closes encoding is used when the server did not specify a size, the |
| 444 | loss of the connection means we are done */ |
| 445 | if (Persistent == false) |
| 446 | In.Limit(-1); |
| 447 | else if (JunkSize != 0) |
| 448 | In.Limit(JunkSize); |
| 449 | else |
| 450 | In.Limit(DownloadSize); |
| 451 | |
| 452 | // Just transfer the whole block. |
| 453 | do |
| 454 | { |
| 455 | if (In.IsLimit() == false) |
| 456 | continue; |
| 457 | |
| 458 | In.Limit(-1); |
| 459 | return !_error->PendingError(); |
| 460 | } |
| 461 | while (Go(true, File) == true); |
| 462 | } |
| 463 | |
| 464 | return Owner->Flush() && !_error->PendingError(); |
| 465 | } |
| 466 | /*}}}*/ |
| 467 | bool HttpServerState::ReadHeaderLines(std::string &Data) /*{{{*/ |
| 468 | { |
| 469 | return In.WriteTillEl(Data); |
| 470 | } |
| 471 | /*}}}*/ |
| 472 | bool HttpServerState::LoadNextResponse(bool const ToFile, FileFd * const File)/*{{{*/ |
| 473 | { |
| 474 | return Go(ToFile, File); |
| 475 | } |
| 476 | /*}}}*/ |
| 477 | bool HttpServerState::WriteResponse(const std::string &Data) /*{{{*/ |
| 478 | { |
| 479 | return Out.Read(Data); |
| 480 | } |
| 481 | /*}}}*/ |
| 482 | APT_PURE bool HttpServerState::IsOpen() /*{{{*/ |
| 483 | { |
| 484 | return (ServerFd != -1); |
| 485 | } |
| 486 | /*}}}*/ |
| 487 | bool HttpServerState::InitHashes(HashStringList const &ExpectedHashes) /*{{{*/ |
| 488 | { |
| 489 | delete In.Hash; |
| 490 | In.Hash = new Hashes(ExpectedHashes); |
| 491 | return true; |
| 492 | } |
| 493 | /*}}}*/ |
| 494 | |
| 495 | APT_PURE Hashes * HttpServerState::GetHashes() /*{{{*/ |
| 496 | { |
| 497 | return In.Hash; |
| 498 | } |
| 499 | /*}}}*/ |
| 500 | // HttpServerState::Die - The server has closed the connection. /*{{{*/ |
| 501 | bool HttpServerState::Die(FileFd &File) |
| 502 | { |
| 503 | unsigned int LErrno = errno; |
| 504 | |
| 505 | // Dump the buffer to the file |
| 506 | if (State == ServerState::Data) |
| 507 | { |
| 508 | // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking |
| 509 | // can't be set |
| 510 | if (File.Name() != "/dev/null") |
| 511 | SetNonBlock(File.Fd(),false); |
| 512 | while (In.WriteSpace() == true) |
| 513 | { |
| 514 | if (In.Write(File.Fd()) == false) |
| 515 | return _error->Errno("write",_("Error writing to the file")); |
| 516 | |
| 517 | // Done |
| 518 | if (In.IsLimit() == true) |
| 519 | return true; |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | // See if this is because the server finished the data stream |
| 524 | if (In.IsLimit() == false && State != HttpServerState::Header && |
| 525 | Persistent == true) |
| 526 | { |
| 527 | Close(); |
| 528 | if (LErrno == 0) |
| 529 | return _error->Error(_("Error reading from server. Remote end closed connection")); |
| 530 | errno = LErrno; |
| 531 | return _error->Errno("read",_("Error reading from server")); |
| 532 | } |
| 533 | else |
| 534 | { |
| 535 | In.Limit(-1); |
| 536 | |
| 537 | // Nothing left in the buffer |
| 538 | if (In.WriteSpace() == false) |
| 539 | return false; |
| 540 | |
| 541 | // We may have got multiple responses back in one packet.. |
| 542 | Close(); |
| 543 | return true; |
| 544 | } |
| 545 | |
| 546 | return false; |
| 547 | } |
| 548 | /*}}}*/ |
| 549 | // HttpServerState::Flush - Dump the buffer into the file /*{{{*/ |
| 550 | // --------------------------------------------------------------------- |
| 551 | /* This takes the current input buffer from the Server FD and writes it |
| 552 | into the file */ |
| 553 | bool HttpServerState::Flush(FileFd * const File) |
| 554 | { |
| 555 | if (File != NULL) |
| 556 | { |
| 557 | // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking |
| 558 | // can't be set |
| 559 | if (File->Name() != "/dev/null") |
| 560 | SetNonBlock(File->Fd(),false); |
| 561 | if (In.WriteSpace() == false) |
| 562 | return true; |
| 563 | |
| 564 | while (In.WriteSpace() == true) |
| 565 | { |
| 566 | if (In.Write(File->Fd()) == false) |
| 567 | return _error->Errno("write",_("Error writing to file")); |
| 568 | if (In.IsLimit() == true) |
| 569 | return true; |
| 570 | } |
| 571 | |
| 572 | if (In.IsLimit() == true || Persistent == false) |
| 573 | return true; |
| 574 | } |
| 575 | return false; |
| 576 | } |
| 577 | /*}}}*/ |
| 578 | // HttpServerState::Go - Run a single loop /*{{{*/ |
| 579 | // --------------------------------------------------------------------- |
| 580 | /* This runs the select loop over the server FDs, Output file FDs and |
| 581 | stdin. */ |
| 582 | bool HttpServerState::Go(bool ToFile, FileFd * const File) |
| 583 | { |
| 584 | // Server has closed the connection |
| 585 | if (ServerFd == -1 && (In.WriteSpace() == false || |
| 586 | ToFile == false)) |
| 587 | return false; |
| 588 | |
| 589 | fd_set rfds,wfds; |
| 590 | FD_ZERO(&rfds); |
| 591 | FD_ZERO(&wfds); |
| 592 | |
| 593 | /* Add the server. We only send more requests if the connection will |
| 594 | be persisting */ |
| 595 | if (Out.WriteSpace() == true && ServerFd != -1 |
| 596 | && Persistent == true) |
| 597 | FD_SET(ServerFd,&wfds); |
| 598 | if (In.ReadSpace() == true && ServerFd != -1) |
| 599 | FD_SET(ServerFd,&rfds); |
| 600 | |
| 601 | // Add the file |
| 602 | int FileFD = -1; |
| 603 | if (File != NULL) |
| 604 | FileFD = File->Fd(); |
| 605 | |
| 606 | if (In.WriteSpace() == true && ToFile == true && FileFD != -1) |
| 607 | FD_SET(FileFD,&wfds); |
| 608 | |
| 609 | // Add stdin |
| 610 | if (_config->FindB("Acquire::http::DependOnSTDIN", true) == true) |
| 611 | FD_SET(STDIN_FILENO,&rfds); |
| 612 | |
| 613 | // Figure out the max fd |
| 614 | int MaxFd = FileFD; |
| 615 | if (MaxFd < ServerFd) |
| 616 | MaxFd = ServerFd; |
| 617 | |
| 618 | // Select |
| 619 | struct timeval tv; |
| 620 | tv.tv_sec = TimeOut; |
| 621 | tv.tv_usec = 0; |
| 622 | int Res = 0; |
| 623 | if ((Res = select(MaxFd+1,&rfds,&wfds,0,&tv)) < 0) |
| 624 | { |
| 625 | if (errno == EINTR) |
| 626 | return true; |
| 627 | return _error->Errno("select",_("Select failed")); |
| 628 | } |
| 629 | |
| 630 | if (Res == 0) |
| 631 | { |
| 632 | _error->Error(_("Connection timed out")); |
| 633 | return Die(*File); |
| 634 | } |
| 635 | |
| 636 | // Handle server IO |
| 637 | if (ServerFd != -1 && FD_ISSET(ServerFd,&rfds)) |
| 638 | { |
| 639 | errno = 0; |
| 640 | if (In.Read(ServerFd) == false) |
| 641 | return Die(*File); |
| 642 | } |
| 643 | |
| 644 | if (ServerFd != -1 && FD_ISSET(ServerFd,&wfds)) |
| 645 | { |
| 646 | errno = 0; |
| 647 | if (Out.Write(ServerFd) == false) |
| 648 | return Die(*File); |
| 649 | } |
| 650 | |
| 651 | // Send data to the file |
| 652 | if (FileFD != -1 && FD_ISSET(FileFD,&wfds)) |
| 653 | { |
| 654 | if (In.Write(FileFD) == false) |
| 655 | return _error->Errno("write",_("Error writing to output file")); |
| 656 | } |
| 657 | |
| 658 | if (MaximumSize > 0 && File && File->Tell() > MaximumSize) |
| 659 | { |
| 660 | Owner->SetFailReason("MaximumSizeExceeded"); |
| 661 | return _error->Error("Writing more data than expected (%llu > %llu)", |
| 662 | File->Tell(), MaximumSize); |
| 663 | } |
| 664 | |
| 665 | // Handle commands from APT |
| 666 | if (FD_ISSET(STDIN_FILENO,&rfds)) |
| 667 | { |
| 668 | if (Owner->Run(true) != -1) |
| 669 | exit(100); |
| 670 | } |
| 671 | |
| 672 | return true; |
| 673 | } |
| 674 | /*}}}*/ |
| 675 | |
| 676 | // HttpMethod::SendReq - Send the HTTP request /*{{{*/ |
| 677 | // --------------------------------------------------------------------- |
| 678 | /* This places the http request in the outbound buffer */ |
| 679 | void HttpMethod::SendReq(FetchItem *Itm) |
| 680 | { |
| 681 | URI Uri = Itm->Uri; |
| 682 | |
| 683 | // The HTTP server expects a hostname with a trailing :port |
| 684 | std::stringstream Req; |
| 685 | string ProperHost; |
| 686 | |
| 687 | if (Uri.Host.find(':') != string::npos) |
| 688 | ProperHost = '[' + Uri.Host + ']'; |
| 689 | else |
| 690 | ProperHost = Uri.Host; |
| 691 | |
| 692 | /* RFC 2616 §5.1.2 requires absolute URIs for requests to proxies, |
| 693 | but while its a must for all servers to accept absolute URIs, |
| 694 | it is assumed clients will sent an absolute path for non-proxies */ |
| 695 | std::string requesturi; |
| 696 | if (Server->Proxy.empty() == true || Server->Proxy.Host.empty()) |
| 697 | requesturi = Uri.Path; |
| 698 | else |
| 699 | requesturi = Itm->Uri; |
| 700 | |
| 701 | // The "+" is encoded as a workaround for a amazon S3 bug |
| 702 | // see LP bugs #1003633 and #1086997. |
| 703 | requesturi = QuoteString(requesturi, "+~ "); |
| 704 | |
| 705 | /* Build the request. No keep-alive is included as it is the default |
| 706 | in 1.1, can cause problems with proxies, and we are an HTTP/1.1 |
| 707 | client anyway. |
| 708 | C.f. https://tools.ietf.org/wg/httpbis/trac/ticket/158 */ |
| 709 | Req << "GET " << requesturi << " HTTP/1.1\r\n"; |
| 710 | if (Uri.Port != 0) |
| 711 | Req << "Host: " << ProperHost << ":" << Uri.Port << "\r\n"; |
| 712 | else |
| 713 | Req << "Host: " << ProperHost << "\r\n"; |
| 714 | |
| 715 | // generate a cache control header (if needed) |
| 716 | if (_config->FindB("Acquire::http::No-Cache",false) == true) |
| 717 | Req << "Cache-Control: no-cache\r\n" |
| 718 | << "Pragma: no-cache\r\n"; |
| 719 | else if (Itm->IndexFile == true) |
| 720 | Req << "Cache-Control: max-age=" << _config->FindI("Acquire::http::Max-Age",0) << "\r\n"; |
| 721 | else if (_config->FindB("Acquire::http::No-Store",false) == true) |
| 722 | Req << "Cache-Control: no-store\r\n"; |
| 723 | |
| 724 | // If we ask for uncompressed files servers might respond with content- |
| 725 | // negotiation which lets us end up with compressed files we do not support, |
| 726 | // see 657029, 657560 and co, so if we have no extension on the request |
| 727 | // ask for text only. As a sidenote: If there is nothing to negotate servers |
| 728 | // seem to be nice and ignore it. |
| 729 | if (_config->FindB("Acquire::http::SendAccept", true) == true) |
| 730 | { |
| 731 | size_t const filepos = Itm->Uri.find_last_of('/'); |
| 732 | string const file = Itm->Uri.substr(filepos + 1); |
| 733 | if (flExtension(file) == file) |
| 734 | Req << "Accept: text/*\r\n"; |
| 735 | } |
| 736 | |
| 737 | // Check for a partial file and send if-queries accordingly |
| 738 | struct stat SBuf; |
| 739 | if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0) |
| 740 | Req << "Range: bytes=" << SBuf.st_size << "-\r\n" |
| 741 | << "If-Range: " << TimeRFC1123(SBuf.st_mtime) << "\r\n"; |
| 742 | else if (Itm->LastModified != 0) |
| 743 | Req << "If-Modified-Since: " << TimeRFC1123(Itm->LastModified).c_str() << "\r\n"; |
| 744 | |
| 745 | if (Server->Proxy.User.empty() == false || Server->Proxy.Password.empty() == false) |
| 746 | Req << "Proxy-Authorization: Basic " |
| 747 | << Base64Encode(Server->Proxy.User + ":" + Server->Proxy.Password) << "\r\n"; |
| 748 | |
| 749 | maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc")); |
| 750 | if (Uri.User.empty() == false || Uri.Password.empty() == false) |
| 751 | Req << "Authorization: Basic " |
| 752 | << Base64Encode(Uri.User + ":" + Uri.Password) << "\r\n"; |
| 753 | |
| 754 | Req << "User-Agent: " << _config->Find("Acquire::http::User-Agent", |
| 755 | "Debian APT-HTTP/1.3 (" PACKAGE_VERSION ")") << "\r\n"; |
| 756 | |
| 757 | Req << "\r\n"; |
| 758 | |
| 759 | if (Debug == true) |
| 760 | cerr << Req.str() << endl; |
| 761 | |
| 762 | Server->WriteResponse(Req.str()); |
| 763 | } |
| 764 | /*}}}*/ |
| 765 | // HttpMethod::Configuration - Handle a configuration message /*{{{*/ |
| 766 | // --------------------------------------------------------------------- |
| 767 | /* We stash the desired pipeline depth */ |
| 768 | bool HttpMethod::Configuration(string Message) |
| 769 | { |
| 770 | if (ServerMethod::Configuration(Message) == false) |
| 771 | return false; |
| 772 | |
| 773 | AllowRedirect = _config->FindB("Acquire::http::AllowRedirect",true); |
| 774 | PipelineDepth = _config->FindI("Acquire::http::Pipeline-Depth", |
| 775 | PipelineDepth); |
| 776 | Debug = _config->FindB("Debug::Acquire::http",false); |
| 777 | |
| 778 | return true; |
| 779 | } |
| 780 | /*}}}*/ |
| 781 | ServerState * HttpMethod::CreateServerState(URI uri) /*{{{*/ |
| 782 | { |
| 783 | return new HttpServerState(uri, this); |
| 784 | } |
| 785 | /*}}}*/ |
| 786 | void HttpMethod::RotateDNS() /*{{{*/ |
| 787 | { |
| 788 | ::RotateDNS(); |
| 789 | } |
| 790 | /*}}}*/ |