X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/2830b8436ac8a6f2f3dac4ce2cd030c24eebce04..98cc7fd2c1d397623960baf69ae3cec04a87a23e:/methods/server.cc diff --git a/methods/server.cc b/methods/server.cc index c91d3b218..f61a6fedb 100644 --- a/methods/server.cc +++ b/methods/server.cc @@ -44,7 +44,8 @@ time_t ServerMethod::FailTime = 0; // --------------------------------------------------------------------- /* Returns 0 if things are OK, 1 if an IO error occurred and 2 if a header parse error occurred */ -ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File) +ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File, + const std::string &Uri) { State = Header; @@ -53,7 +54,8 @@ ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File) Major = 0; Minor = 0; Result = 0; - Size = 0; + TotalFileSize = 0; + JunkSize = 0; StartPos = 0; Encoding = Closes; HaveContent = false; @@ -66,7 +68,7 @@ ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File) continue; if (Owner->Debug == true) - clog << Data; + clog << "Answer for: " << Uri << endl << Data; for (string::const_iterator I = Data.begin(); I < Data.end(); ++I) { @@ -127,7 +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) @@ -162,15 +164,22 @@ bool ServerState::HeaderLine(string Line) Encoding = Stream; HaveContent = true; - // The length is already set from the Content-Range header - if (StartPos != 0) - return true; + unsigned long long * DownloadSizePtr = &DownloadSize; + if (Result == 416) + DownloadSizePtr = &JunkSize; - Size = strtoull(Val.c_str(), NULL, 10); - if (Size >= 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 (Size == 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; } @@ -185,15 +194,15 @@ 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) - { - StartPos = 1; // ignore Content-Length, it would override Size - HaveContent = false; - } - else if (sscanf(Val.c_str(),"bytes %llu-%*u/%llu",&StartPos,&Size) != 2) + 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,&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; } @@ -236,10 +245,21 @@ ServerState::ServerState(URI Srv, ServerMethod *Owner) : ServerName(Srv), TimeOu Reset(); } /*}}}*/ +bool ServerState::AddPartialFileToHashes(FileFd &File) /*{{{*/ +{ + File.Truncate(StartPos); + return GetHashes()->AddFD(File, StartPos); +} + /*}}}*/ bool ServerMethod::Configuration(string Message) /*{{{*/ { - return pkgAcqMethod::Configuration(Message); + if (pkgAcqMethod::Configuration(Message) == false) + return false; + + DropPrivsOrDie(); + + return true; } /*}}}*/ @@ -259,7 +279,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res) Res.LastModified = Queue->LastModified; return IMS_HIT; } - + /* Redirect * * Note that it is only OK for us to treat all redirection the same @@ -304,12 +324,31 @@ 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 - Server->StartPos = Server->Size; - Server->Result = 200; + if (Server->HaveContent == true) + { + // Send to error page to dev/null + FileFd DevNull("/dev/null",FileFd::WriteExists); + Server->RunData(&DevNull); + } Server->HaveContent = false; + Server->StartPos = Server->TotalFileSize; + Server->Result = 200; } else if (unlink(Queue->DestFile.c_str()) == 0) { @@ -323,10 +362,10 @@ ServerMethod::DealWithHeaders(FetchResult &Res) 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; @@ -334,7 +373,7 @@ 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; @@ -347,7 +386,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res) 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; @@ -485,7 +524,7 @@ int ServerMethod::Loop() Fetch(0); // Fetch the next URL header data from the server. - switch (Server->RunHeaders(File)) + switch (Server->RunHeaders(File, Queue->Uri)) { case ServerState::RUN_HEADERS_OK: break; @@ -531,6 +570,13 @@ 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); @@ -604,7 +650,10 @@ int ServerMethod::Loop() QueueBack = Queue; } else + { + Server->Close(); Fail(true); + } } break; } @@ -697,5 +746,15 @@ 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; } /*}}}*/