X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/92e8c1ff287ab829de825e00cdf94744e699ff97..72ed5f14b558984bd9c5731f82345b10cb2df2ca:/methods/server.cc diff --git a/methods/server.cc b/methods/server.cc index cb0341d5f..322b8d94c 100644 --- a/methods/server.cc +++ b/methods/server.cc @@ -54,7 +54,7 @@ ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File, Major = 0; Minor = 0; Result = 0; - Size = 0; + TotalFileSize = 0; JunkSize = 0; StartPos = 0; Encoding = Closes; @@ -114,7 +114,7 @@ bool ServerState::HeaderLine(string Line) // Parse off any trailing spaces between the : and the next word. string::size_type Pos2 = Pos; - while (Pos2 < Line.length() && isspace(Line[Pos2]) != 0) + while (Pos2 < Line.length() && isspace_ascii(Line[Pos2]) != 0) Pos2++; string Tag = string(Line,0,Pos); @@ -129,7 +129,7 @@ bool ServerState::HeaderLine(string Line) if (elements == 3) { Code[0] = '\0'; - if (Owner->Debug == true) + if (Owner != NULL && Owner->Debug == true) clog << "HTTP server doesn't give Reason-Phrase for " << Result << std::endl; } else if (elements != 4) @@ -150,9 +150,15 @@ bool ServerState::HeaderLine(string Line) else { if (Major == 1 && Minor == 0) + { Persistent = false; + } else + { Persistent = true; + if (PipelineAllowed) + Pipeline = true; + } } return true; @@ -164,15 +170,22 @@ bool ServerState::HeaderLine(string Line) Encoding = Stream; HaveContent = true; - unsigned long long * SizePtr = &Size; + unsigned long long * DownloadSizePtr = &DownloadSize; if (Result == 416) - SizePtr = &JunkSize; + DownloadSizePtr = &JunkSize; - *SizePtr = strtoull(Val.c_str(), NULL, 10); - if (*SizePtr >= std::numeric_limits::max()) + *DownloadSizePtr = strtoull(Val.c_str(), NULL, 10); + if (*DownloadSizePtr >= std::numeric_limits::max()) return _error->Errno("HeaderLine", _("The HTTP server sent an invalid Content-Length header")); - else if (*SizePtr == 0) + else if (*DownloadSizePtr == 0) HaveContent = false; + + // On partial content (206) the Content-Length less than the real + // size, so do not set it here but leave that to the Content-Range + // header instead + if(Result != 206 && TotalFileSize == 0) + TotalFileSize = DownloadSize; + return true; } @@ -187,12 +200,15 @@ bool ServerState::HeaderLine(string Line) HaveContent = true; // §14.16 says 'byte-range-resp-spec' should be a '*' in case of 416 - if (Result == 416 && sscanf(Val.c_str(), "bytes */%llu",&Size) == 1) + if (Result == 416 && sscanf(Val.c_str(), "bytes */%llu",&TotalFileSize) == 1) ; // we got the expected filesize which is all we wanted - else if (sscanf(Val.c_str(),"bytes %llu-%*u/%llu",&StartPos,&Size) != 2) + else if (sscanf(Val.c_str(),"bytes %llu-%*u/%llu",&StartPos,&TotalFileSize) != 2) return _error->Error(_("The HTTP server sent an invalid Content-Range header")); - if ((unsigned long long)StartPos > Size) + if ((unsigned long long)StartPos > TotalFileSize) return _error->Error(_("This HTTP server has broken range support")); + + // figure out what we will download + DownloadSize = TotalFileSize - StartPos; return true; } @@ -230,15 +246,16 @@ bool ServerState::HeaderLine(string Line) } /*}}}*/ // ServerState::ServerState - Constructor /*{{{*/ -ServerState::ServerState(URI Srv, ServerMethod *Owner) : ServerName(Srv), TimeOut(120), Owner(Owner) +ServerState::ServerState(URI Srv, ServerMethod *Owner) : + DownloadSize(0), ServerName(Srv), TimeOut(120), Owner(Owner) { Reset(); } /*}}}*/ - -bool ServerMethod::Configuration(string Message) /*{{{*/ +bool ServerState::AddPartialFileToHashes(FileFd &File) /*{{{*/ { - return pkgAcqMethod::Configuration(Message); + File.Truncate(StartPos); + return GetHashes()->AddFD(File, StartPos); } /*}}}*/ @@ -253,12 +270,12 @@ ServerMethod::DealWithHeaders(FetchResult &Res) // Not Modified if (Server->Result == 304) { - unlink(Queue->DestFile.c_str()); + RemoveFile("server", Queue->DestFile); Res.IMSHit = true; Res.LastModified = Queue->LastModified; return IMS_HIT; } - + /* Redirect * * Note that it is only OK for us to treat all redirection the same @@ -303,7 +320,20 @@ ServerMethod::DealWithHeaders(FetchResult &Res) struct stat SBuf; if (stat(Queue->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0) { - if ((unsigned long long)SBuf.st_size == Server->Size) + bool partialHit = false; + if (Queue->ExpectedHashes.usable() == true) + { + Hashes resultHashes(Queue->ExpectedHashes); + FileFd file(Queue->DestFile, FileFd::ReadOnly); + Server->TotalFileSize = file.FileSize(); + Server->Date = file.ModificationTime(); + resultHashes.AddFD(file); + HashStringList const hashList = resultHashes.GetHashStringList(); + partialHit = (Queue->ExpectedHashes == hashList); + } + else if ((unsigned long long)SBuf.st_size == Server->TotalFileSize) + partialHit = true; + if (partialHit == true) { // the file is completely downloaded, but was not moved if (Server->HaveContent == true) @@ -313,10 +343,10 @@ ServerMethod::DealWithHeaders(FetchResult &Res) Server->RunData(&DevNull); } Server->HaveContent = false; - Server->StartPos = Server->Size; + Server->StartPos = Server->TotalFileSize; Server->Result = 200; } - else if (unlink(Queue->DestFile.c_str()) == 0) + else if (RemoveFile("server", Queue->DestFile)) { NextURI = Queue->Uri; return TRY_AGAIN_OR_REDIRECT; @@ -324,14 +354,14 @@ ServerMethod::DealWithHeaders(FetchResult &Res) } } - /* We have a reply we dont handle. This should indicate a perm server + /* We have a reply we don't handle. This should indicate a perm server failure */ if (Server->Result < 200 || Server->Result >= 300) { - char err[255]; - snprintf(err,sizeof(err)-1,"HttpError%i",Server->Result); + std::string err; + strprintf(err, "HttpError%u", Server->Result); SetFailReason(err); - _error->Error("%u %s",Server->Result,Server->Code); + _error->Error("%u %s", Server->Result, Server->Code); if (Server->HaveContent == true) return ERROR_WITH_CONTENT_PAGE; return ERROR_UNRECOVERABLE; @@ -339,7 +369,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res) // This is some sort of 2xx 'data follows' reply Res.LastModified = Server->Date; - Res.Size = Server->Size; + Res.Size = Server->TotalFileSize; // Open the file delete File; @@ -348,11 +378,11 @@ ServerMethod::DealWithHeaders(FetchResult &Res) return ERROR_NOT_FROM_SERVER; FailFile = Queue->DestFile; - FailFile.c_str(); // Make sure we dont do a malloc in the signal handler + FailFile.c_str(); // Make sure we don't do a malloc in the signal handler FailFd = File->Fd(); FailTime = Server->Date; - if (Server->InitHashes(*File) == false) + if (Server->InitHashes(Queue->ExpectedHashes) == false || Server->AddPartialFileToHashes(*File) == false) { _error->Errno("read",_("Problem hashing file")); return ERROR_NOT_FROM_SERVER; @@ -397,9 +427,16 @@ bool ServerMethod::Fetch(FetchItem *) for (FetchItem *I = Queue; I != 0 && Depth < (signed)PipelineDepth; I = I->Next, Depth++) { - // If pipelining is disabled, we only queue 1 request - if (Server->Pipeline == false && Depth >= 0) - break; + if (Depth >= 0) + { + // If pipelining is disabled, we only queue 1 request + if (Server->Pipeline == false) + break; + // if we have no hashes, do at most one such request + // as we can't fixup pipeling misbehaviors otherwise + else if (I->ExpectedHashes.usable() == false) + break; + } // Make sure we stick with the same server if (Server->Comp(I->Uri) == false) @@ -454,10 +491,8 @@ int ServerMethod::Loop() // Connect to the server if (Server == 0 || Server->Comp(Queue->Uri) == false) - { - delete Server; Server = CreateServerState(Queue->Uri); - } + /* If the server has explicitly said this is the last connection then we pre-emptively shut down the pipeline and tear down the connection. This will speed up HTTP/1.0 servers a tad @@ -474,8 +509,7 @@ int ServerMethod::Loop() if (Server->Open() == false) { Fail(true); - delete Server; - Server = 0; + Server = nullptr; continue; } @@ -505,6 +539,7 @@ int ServerMethod::Loop() _error->Discard(); Server->Close(); Server->Pipeline = false; + Server->PipelineAllowed = false; if (FailCounter >= 2) { @@ -529,6 +564,13 @@ int ServerMethod::Loop() // Run the data bool Result = true; + + // ensure we don't fetch too much + // we could do "Server->MaximumSize = Queue->MaximumSize" here + // but that would break the clever pipeline messup detection + // so instead we use the size of the biggest item in the queue + Server->MaximumSize = FindMaximumObjectSizeInQueue(); + if (Server->HaveContent) Result = Server->RunData(File); @@ -551,7 +593,39 @@ int ServerMethod::Loop() // Send status to APT if (Result == true) { - Res.TakeHashes(*Server->GetHashes()); + Hashes * const resultHashes = Server->GetHashes(); + HashStringList const hashList = resultHashes->GetHashStringList(); + if (PipelineDepth != 0 && Queue->ExpectedHashes.usable() == true && Queue->ExpectedHashes != hashList) + { + // we did not get the expected hash… mhhh: + // could it be that server/proxy messed up pipelining? + FetchItem * BeforeI = Queue; + for (FetchItem *I = Queue->Next; I != 0 && I != QueueBack; I = I->Next) + { + if (I->ExpectedHashes.usable() == true && I->ExpectedHashes == hashList) + { + // yes, he did! Disable pipelining and rewrite queue + if (Server->Pipeline == true) + { + // FIXME: fake a warning message as we have no proper way of communicating here + std::string out; + strprintf(out, _("Automatically disabled %s due to incorrect response from server/proxy. (man 5 apt.conf)"), "Acquire::http::PipelineDepth"); + std::cerr << "W: " << out << std::endl; + Server->Pipeline = false; + Server->PipelineAllowed = false; + // we keep the PipelineDepth value so that the rest of the queue can be fixed up as well + } + Rename(Res.Filename, I->DestFile); + Res.Filename = I->DestFile; + BeforeI->Next = I->Next; + I->Next = Queue; + Queue = I; + break; + } + BeforeI = I; + } + } + Res.TakeHashes(*resultHashes); URIDone(Res); } else @@ -571,7 +645,10 @@ int ServerMethod::Loop() QueueBack = Queue; } else + { + Server->Close(); Fail(true); + } } break; } @@ -666,3 +743,17 @@ int ServerMethod::Loop() return 0; } /*}}}*/ +unsigned long long ServerMethod::FindMaximumObjectSizeInQueue() const /*{{{*/ +{ + unsigned long long MaxSizeInQueue = 0; + for (FetchItem *I = Queue; I != 0 && I != QueueBack; I = I->Next) + MaxSizeInQueue = std::max(MaxSizeInQueue, I->MaximumSize); + return MaxSizeInQueue; +} + /*}}}*/ +ServerMethod::ServerMethod(char const * const Binary, char const * const Ver,unsigned long const Flags) :/*{{{*/ + aptMethod(Binary, Ver, Flags), Server(nullptr), File(NULL), PipelineDepth(10), + AllowRedirect(false), Debug(false) +{ +} + /*}}}*/