+// AcqIndexDiffs::AcqIndexDiffs - Constructor
+// ---------------------------------------------------------------------
+/* The package diff is added to the queue. one object is constructed
+ * for each diff and the index
+ */
+pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire *Owner,
+ string URI,string URIDesc,string ShortDesc,
+ string ExpectedMD5, vector<DiffInfo> diffs)
+ : Item(Owner), RealURI(URI), ExpectedMD5(ExpectedMD5), available_patches(diffs)
+{
+
+ DestFile = _config->FindDir("Dir::State::lists") + "partial/";
+ DestFile += URItoFileName(URI);
+
+ Debug = _config->FindB("Debug::pkgAcquire::Diffs",false);
+
+ Desc.Description = URIDesc;
+ Desc.Owner = this;
+ Desc.ShortDesc = ShortDesc;
+
+ CurrentPackagesFile = _config->FindDir("Dir::State::lists");
+ CurrentPackagesFile += URItoFileName(RealURI);
+
+ if(Debug) {
+ std::clog << "pkgAcqIndexDiffs::pkgAcqIndexDiffs(): "
+ << CurrentPackagesFile << std::endl;
+ }
+
+ if(!FileExists(CurrentPackagesFile) ||
+ !_config->FindB("Acquire::Diffs",true)) {
+ // we don't have a pkg file or we don't want to queue
+ if(Debug)
+ std::clog << "No index file or canceld by user" << std::endl;
+ Failed("", NULL);
+ return;
+ }
+
+ if(available_patches.size() == 0)
+ QueueDiffIndex(URI);
+ else
+ QueueNextDiff();
+}
+
+void pkgAcqIndexDiffs::QueueDiffIndex(string URI)
+{
+ Desc.URI = URI + ".diff/Index";
+ Desc.Description = Description + "IndexDiff";
+ DestFile = _config->FindDir("Dir::State::lists") + "partial/";
+ DestFile += URItoFileName(URI) + string(".IndexDiff");
+
+ if(Debug)
+ std::clog << "QueueDiffIndex: " << Desc.URI << std::endl;
+
+ QueueURI(Desc);
+}
+
+// AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/
+// ---------------------------------------------------------------------
+/* The only header we use is the last-modified header. */
+string pkgAcqIndexDiffs::Custom600Headers()
+{
+ if(DestFile.rfind(".IndexDiff") == string::npos)
+ return string("");
+
+ string Final = _config->FindDir("Dir::State::lists");
+ Final += URItoFileName(RealURI) + string(".IndexDiff");
+
+ if(Debug)
+ std::clog << "Custom600Header-IMS: " << Final << std::endl;
+
+ struct stat Buf;
+ if (stat(Final.c_str(),&Buf) != 0)
+ return "\nIndex-File: true";
+
+ return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
+}
+
+void pkgAcqIndexDiffs::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
+{
+ if(Debug)
+ std::clog << "Failed(): " << Desc.URI << std::endl
+ << "Falling back to big package file" << std::endl;
+ new pkgAcqIndex(Owner, RealURI, Desc.Description,Desc.ShortDesc,
+ ExpectedMD5);
+ Finish();
+}
+
+
+// helper that cleans the item out of the fetcher queue
+void pkgAcqIndexDiffs::Finish(bool allDone)
+{
+ // we restore the original name, this is required, otherwise
+ // the file will be cleaned
+ if(allDone) {
+ // this is for the "real" finish
+ DestFile = _config->FindDir("Dir::State::lists");
+ DestFile += URItoFileName(RealURI);
+ Complete = true;
+ Dequeue();
+ if(Debug)
+ std::clog << "\n\nallDone: " << DestFile << "\n" << std::endl;
+ return;
+
+ }
+
+ if(Debug)
+ std::clog << "Finishing: " << Desc.URI << std::endl;
+ Complete = false;
+ Status = StatDone;
+ Dequeue();
+ return;
+}
+
+
+// this needs to be rewriten to not depend on the external ed
+bool pkgAcqIndexDiffs::ApplyDiff(string PatchFile)
+{
+ char *error;
+ int res=0;
+
+ string FinalFile = _config->FindDir("Dir::State::lists");
+ FinalFile += URItoFileName(RealURI);
+
+ int Process = ExecFork();
+ if (Process == 0)
+ {
+ chdir(_config->FindDir("Dir::State::lists").c_str());
+ // for some reason "red" fails with the pdiffs from p.d.o/~aba ?!?
+ string cmd = "(zcat " + PatchFile + "; echo \"wq\" ) | /bin/ed " + FinalFile + " >/dev/null 2>/dev/null";
+ if(Debug)
+ std::clog << "Runing: " << cmd << std::endl;
+ res = system(cmd.c_str());
+ _exit(WEXITSTATUS(res));
+ }
+ if(!ExecWait(Process, error, true)) {
+ //_error->Error("Patch failed: %s ", error);
+ return false;
+ }
+
+ return true;
+}
+
+bool pkgAcqIndexDiffs::QueueNextDiff()
+{
+ // calc sha1 of the just patched file
+ string FinalFile = _config->FindDir("Dir::State::lists");
+ FinalFile += URItoFileName(RealURI);
+
+ FileFd fd(FinalFile, FileFd::ReadOnly);
+ SHA1Summation SHA1;
+ SHA1.AddFD(fd.Fd(), fd.Size());
+ string local_sha1 = string(SHA1.Result());
+
+ // remove all patches until the next matching patch is found
+ // this requires the Index file to be ordered
+ for(vector<DiffInfo>::iterator I=available_patches.begin();
+ I != available_patches.end() && (*I).sha1 != local_sha1;
+ I++)
+ available_patches.erase(I);
+
+ // error checking and falling back if no patch was found
+ if(available_patches.size() == 0) {
+ Failed("", NULL);
+ return false;
+ }
+
+ // queue the right diff
+ Desc.URI = string(RealURI) + string(".diff/") + available_patches[0].file + string(".gz");
+ Desc.Description = available_patches[0].file + string(".pdiff");
+
+ DestFile = _config->FindDir("Dir::State::lists") + "partial/";
+ DestFile += URItoFileName(RealURI + string(".diff/") + available_patches[0].file);
+
+ if(Debug)
+ std::clog << "pkgAcqIndexDiffs::QueueNextDiff(): " << Desc.URI << std::endl;
+
+ QueueURI(Desc);
+
+ return true;
+}
+
+bool pkgAcqIndexDiffs::ParseIndexDiff(string IndexDiffFile)
+{
+ if(Debug)
+ std::clog << "pkgAcqIndexDiffs::ParseIndexDiff() " << IndexDiffFile
+ << std::endl;
+
+ FileFd Fd(IndexDiffFile,FileFd::ReadOnly);
+ pkgTagFile TF(&Fd);
+ if (_error->PendingError() == true)
+ return false;
+ pkgTagSection Tags;
+ if(TF.Step(Tags) == true)
+ {
+ string local_sha1;
+ string tmp = Tags.FindS("SHA1-Current");
+ std::stringstream ss(tmp);
+ ss >> ServerSha1;
+
+ FileFd fd(CurrentPackagesFile, FileFd::ReadOnly);
+ SHA1Summation SHA1;
+ SHA1.AddFD(fd.Fd(), fd.Size());
+ local_sha1 = string(SHA1.Result());
+
+ if(local_sha1 == ServerSha1) {
+ if(Debug)
+ std::clog << "Package file is up-to-date" << std::endl;
+ Finish(true);
+ return true;
+ }
+ if(Debug)
+ std::clog << "SHA1-Current: " << ServerSha1 << std::endl;
+
+ // check the historie and see what patches we need
+ string history = Tags.FindS("SHA1-History");
+ std::stringstream hist(history);
+ DiffInfo d;
+ string size;
+ bool found = false;
+ while(hist >> d.sha1 >> size >> d.file) {
+ d.size = atoi(size.c_str());
+ // read until the first match is found
+ if(d.sha1 == local_sha1)
+ found=true;
+ // from that point on, we probably need all diffs
+ if(found) {
+ if(Debug)
+ std::clog << "Need to get diff: " << d.file << std::endl;
+ available_patches.push_back(d);
+ }
+ }
+
+ // no information how to get the patches, bail out
+ if(!found) {
+ if(Debug)
+ std::clog << "Can't find a patch in the index file" << std::endl;
+ // Failed will queue a big package file
+ Failed("", NULL);
+ } else {
+ // queue the diffs
+ new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,
+ ExpectedMD5, available_patches);
+ Finish();
+ return true;
+ }
+ }
+
+ return false;
+}
+
+
+void pkgAcqIndexDiffs::Done(string Message,unsigned long Size,string Md5Hash,
+ pkgAcquire::MethodConfig *Cnf)
+{
+ if(Debug)
+ std::clog << "pkgAcqIndexDiffs::Done(): " << Desc.URI << std::endl;
+
+ Item::Done(Message,Size,Md5Hash,Cnf);
+
+ int len = Desc.URI.size();
+ // sucess in downloading the index
+ if(Desc.URI.substr(len-strlen("Index"),len-1) == "Index") {
+
+ // rename
+ string FinalFile = _config->FindDir("Dir::State::lists");
+ FinalFile += URItoFileName(RealURI) + string(".IndexDiff");
+ if(Debug)
+ std::clog << "Renaming: " << DestFile << " -> " << FinalFile
+ << std::endl;
+ Rename(DestFile,FinalFile);
+ chmod(FinalFile.c_str(),0644);
+ DestFile = FinalFile;
+
+ if(!ParseIndexDiff(DestFile))
+ return Failed("", NULL);
+ else
+ return Finish();
+ }
+
+ // sucess in downloading a diff
+ if(Desc.URI.find(".diff") != string::npos) {
+ ApplyDiff(DestFile);
+ available_patches.erase(available_patches.begin());
+
+ if(available_patches.size() > 0) {
+ new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,
+ ExpectedMD5, available_patches);
+ } else {
+ Finish(true);
+ return;
+ }
+ }
+
+ Finish();
+}
+
+
projects / apt.git / blobdiff