From 50d98a1be2e15f44dea23a5d3840c79366a42fe0 Mon Sep 17 00:00:00 2001 From: Michael Vogt Date: Thu, 22 May 2014 10:49:35 +0200 Subject: Implement simple by-hash for apt update This implements a apt update schema that get the indexfiles by the hash instead of the name. The rational is that updates to the archive servers/mirrors are not atomic so the client may have the previous version of the Release file when the server updates to a new Release file and new Packages/Sources/Translations indexes. By keeping the files around by their hash we can still get the previous indexfile without a hashsum mismatch. Enable with APT::Acquire::By-Hash=1 --- apt-pkg/acquire-item.cc | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'apt-pkg/acquire-item.cc') diff --git a/apt-pkg/acquire-item.cc b/apt-pkg/acquire-item.cc index 99013d649..1f3d83941 100644 --- a/apt-pkg/acquire-item.cc +++ b/apt-pkg/acquire-item.cc @@ -1020,6 +1020,27 @@ void pkgAcqIndex::Init(string const &URI, string const &URIDesc, string const &S FileSize = Record->Size; } + // do the request by-hash + if(_config->FindB("APT::Acquire::By-Hash", false) == true && + MetaIndexParser) + { + indexRecords::checkSum *Record = MetaIndexParser->Lookup(MetaKey); + if(Record) + { + // FIXME: make the hash used a config option or read from release file + const HashString *TargetHash = Record->Hashes.find("SHA256"); + std::string ByHash = "/by-hash/" + TargetHash->HashValue(); + size_t trailing_slash = Desc.URI.find_last_of("/"); + Desc.URI = Desc.URI.replace(trailing_slash, + Desc.URI.substr(trailing_slash+1).size()+1, + ByHash); + std::cerr << Desc.URI << std::endl; + } else { + _error->Warning("By-Hash requested but can not find record for %s", + MetaKey.c_str()); + } + } + Desc.Description = URIDesc; Desc.Owner = this; Desc.ShortDesc = ShortDesc; -- cgit v1.2.3