X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/e29dfa9ebfe9940089697fbb3e436e8ff95ecad6..62f1ee1cc7a5e16ca0cbfbee3c00cefab1892f87:/methods/mirror.cc diff --git a/methods/mirror.cc b/methods/mirror.cc index 9fe64fd70..d3aef91bc 100644 --- a/methods/mirror.cc +++ b/methods/mirror.cc @@ -3,31 +3,41 @@ // $Id: mirror.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $ /* ###################################################################### - Mirror Aquire Method - This is the Mirror aquire method for APT. + Mirror Acquire Method - This is the Mirror acquire method for APT. ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ +#include + +#include #include #include #include #include #include -#include #include - -#include +#include +#include +#include + +#include +#include +#include +#include #include -#include +#include #include -#include +#include #include using namespace std; +#include + #include "mirror.h" #include "http.h" -#include "apti18n.h" +#include /*}}}*/ /* Done: @@ -39,7 +49,7 @@ using namespace std; * of the failure that is also send to LP * * TODO: - * - deal with runing as non-root because we can't write to the lists + * - deal with running as non-root because we can't write to the lists dir then -> use the cached mirror file * - better method to download than having a pkgAcquire interface here * and better error handling there! @@ -48,9 +58,9 @@ using namespace std; */ MirrorMethod::MirrorMethod() - : HttpMethod(), HasMirrorFile(false) + : HttpMethod(), DownloadedMirrorFile(false), Debug(false) { -}; +} // HttpMethod::Configuration - Handle a configuration message /*{{{*/ // --------------------------------------------------------------------- @@ -73,21 +83,24 @@ bool MirrorMethod::Clean(string Dir) if(Debug) clog << "MirrorMethod::Clean(): " << Dir << endl; + if(Dir == "/") + return _error->Error("will not clean: '/'"); + // read sources.list pkgSourceList list; list.ReadMainList(); - DIR *D = opendir(Dir.c_str()); + DIR *D = opendir(Dir.c_str()); if (D == 0) return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str()); - + string StartDir = SafeGetCWD(); if (chdir(Dir.c_str()) != 0) { closedir(D); return _error->Errno("chdir",_("Unable to change to %s"),Dir.c_str()); } - + for (struct dirent *Dir = readdir(D); Dir != 0; Dir = readdir(D)) { // Skip some files.. @@ -98,10 +111,10 @@ bool MirrorMethod::Clean(string Dir) continue; // see if we have that uri - for(I=list.begin(); I != list.end(); I++) + for(I=list.begin(); I != list.end(); ++I) { string uri = (*I)->GetURI(); - if(uri.substr(0,strlen("mirror://")) != string("mirror://")) + if(uri.compare(0, strlen("mirror://"), "mirror://") != 0) continue; string BaseUri = uri.substr(0,uri.size()-1); if (URItoFileName(BaseUri) == Dir->d_name) @@ -110,15 +123,203 @@ bool MirrorMethod::Clean(string Dir) // nothing found, nuke it if (I == list.end()) unlink(Dir->d_name); - }; - - chdir(StartDir.c_str()); + } + closedir(D); - return true; + if (chdir(StartDir.c_str()) != 0) + return _error->Errno("chdir",_("Unable to change to %s"),StartDir.c_str()); + return true; +} + + +bool MirrorMethod::DownloadMirrorFile(string /*mirror_uri_str*/) +{ + // not that great to use pkgAcquire here, but we do not have + // any other way right now + string fetch = BaseUri; + fetch.replace(0,strlen("mirror://"),"http://"); + +#if 0 // no need for this, the getArchitectures() will also include the main + // arch + // append main architecture + fetch += "?arch=" + _config->Find("Apt::Architecture"); +#endif + + // append all architectures + std::vector vec = APT::Configuration::getArchitectures(); + for (std::vector::const_iterator I = vec.begin(); + I != vec.end(); ++I) + if (I == vec.begin()) + fetch += "?arch=" + (*I); + else + fetch += "&arch=" + (*I); + + // append the dist as a query string + if (Dist != "") + fetch += "&dist=" + Dist; + + if(Debug) + clog << "MirrorMethod::DownloadMirrorFile(): '" << fetch << "'" + << " to " << MirrorFile << endl; + + pkgAcquire Fetcher; + new pkgAcqFile(&Fetcher, fetch, "", 0, "", "", "", MirrorFile); + bool res = (Fetcher.Run() == pkgAcquire::Continue); + if(res) { + DownloadedMirrorFile = true; + chmod(MirrorFile.c_str(), 0644); + } + Fetcher.Shutdown(); + + if(Debug) + clog << "MirrorMethod::DownloadMirrorFile() success: " << res << endl; + + return res; +} + +// Randomizes the lines in the mirror file, this is used so that +// we spread the load on the mirrors evenly +bool MirrorMethod::RandomizeMirrorFile(string mirror_file) +{ + vector content; + string line; + + if (!FileExists(mirror_file)) + return false; + + // read + ifstream in(mirror_file.c_str()); + while ( !in.eof() ) { + getline(in, line); + content.push_back(line); + } + + // we want the file to be random for each different machine, but also + // "stable" on the same machine. this is to avoid running into out-of-sync + // issues (i.e. Release/Release.gpg different on each mirror) + struct utsname buf; + int seed=1; + if(uname(&buf) == 0) { + for(int i=0,seed=1; buf.nodename[i] != 0; ++i) { + seed = seed * 31 + buf.nodename[i]; + } + } + srand( seed ); + random_shuffle(content.begin(), content.end()); + + // write + ofstream out(mirror_file.c_str()); + while ( !content.empty()) { + line = content.back(); + content.pop_back(); + out << line << "\n"; + } + + return true; +} + +/* convert a the Queue->Uri back to the mirror base uri and look + * at all mirrors we have for this, this is needed as queue->uri + * may point to different mirrors (if TryNextMirror() was run) + */ +void MirrorMethod::CurrentQueueUriToMirror() +{ + // already in mirror:// style so nothing to do + if(Queue->Uri.find("mirror://") == 0) + return; + + // find current mirror and select next one + for (vector::const_iterator mirror = AllMirrors.begin(); + mirror != AllMirrors.end(); ++mirror) + { + if (Queue->Uri.find(*mirror) == 0) + { + Queue->Uri.replace(0, mirror->length(), BaseUri); + return; + } + } + _error->Error("Internal error: Failed to convert %s back to %s", + Queue->Uri.c_str(), BaseUri.c_str()); +} + +bool MirrorMethod::TryNextMirror() +{ + // find current mirror and select next one + for (vector::const_iterator mirror = AllMirrors.begin(); + mirror != AllMirrors.end(); ++mirror) + { + if (Queue->Uri.find(*mirror) != 0) + continue; + + vector::const_iterator nextmirror = mirror + 1; + if (nextmirror == AllMirrors.end()) + break; + Queue->Uri.replace(0, mirror->length(), *nextmirror); + if (Debug) + clog << "TryNextMirror: " << Queue->Uri << endl; + + // inform parent + UsedMirror = *nextmirror; + Log("Switching mirror"); + return true; + } + + if (Debug) + clog << "TryNextMirror could not find another mirror to try" << endl; + + return false; } +bool MirrorMethod::InitMirrors() +{ + // if we do not have a MirrorFile, fallback + if(!FileExists(MirrorFile)) + { + // FIXME: fallback to a default mirror here instead + // and provide a config option to define that default + return _error->Error(_("No mirror file '%s' found "), MirrorFile.c_str()); + } + + if (access(MirrorFile.c_str(), R_OK) != 0) + { + // FIXME: fallback to a default mirror here instead + // and provide a config option to define that default + return _error->Error(_("Can not read mirror file '%s'"), MirrorFile.c_str()); + } -bool MirrorMethod::GetMirrorFile(string mirror_uri_str) + // FIXME: make the mirror selection more clever, do not + // just use the first one! + // BUT: we can not make this random, the mirror has to be + // stable across session, because otherwise we can + // get into sync issues (got indexfiles from mirror A, + // but packages from mirror B - one might be out of date etc) + ifstream in(MirrorFile.c_str()); + string s; + while (!in.eof()) + { + getline(in, s); + + // ignore lines that start with # + if (s.find("#") == 0) + continue; + // ignore empty lines + if (s.size() == 0) + continue; + // ignore non http lines + if (s.compare(0, strlen("http://"), "http://") != 0) + continue; + + AllMirrors.push_back(s); + } + if (AllMirrors.empty()) { + return _error->Error(_("No entry found in mirror file '%s'"), MirrorFile.c_str()); + } + Mirror = AllMirrors[0]; + UsedMirror = Mirror; + return true; +} + +string MirrorMethod::GetMirrorFileName(string mirror_uri_str) { /* - a mirror_uri_str looks like this: @@ -144,14 +345,15 @@ bool MirrorMethod::GetMirrorFile(string mirror_uri_str) in both cases! So we need to apply some domain knowledge here :( and check for /dists/ or /Release.gpg as suffixes */ + string name; if(Debug) - std::cerr << "GetMirrorFile: " << mirror_uri_str << std::endl; + std::cerr << "GetMirrorFileName: " << mirror_uri_str << std::endl; // read sources.list and find match vector::const_iterator I; pkgSourceList list; list.ReadMainList(); - for(I=list.begin(); I != list.end(); I++) + for(I=list.begin(); I != list.end(); ++I) { string uristr = (*I)->GetURI(); if(Debug) @@ -164,64 +366,18 @@ bool MirrorMethod::GetMirrorFile(string mirror_uri_str) if(Debug) std::cerr << "found BaseURI: " << uristr << std::endl; BaseUri = uristr.substr(0,uristr.size()-1); + Dist = (*I)->GetDist(); } } - string fetch = BaseUri; - fetch.replace(0,strlen("mirror://"),"http://"); - // get new file - MirrorFile = _config->FindDir("Dir::State::mirrors") + URItoFileName(BaseUri); + name = _config->FindDir("Dir::State::mirrors") + URItoFileName(BaseUri); if(Debug) { cerr << "base-uri: " << BaseUri << endl; - cerr << "mirror-file: " << MirrorFile << endl; + cerr << "mirror-file: " << name << endl; } - - // check the file, if it is not older than RefreshInterval just use it - // otherwise try to get a new one - if(FileExists(MirrorFile)) - { - struct stat buf; - time_t t,now,refresh; - if(stat(MirrorFile.c_str(), &buf) != 0) - return false; - t = std::max(buf.st_mtime, buf.st_ctime); - now = time(NULL); - refresh = 60*_config->FindI("Acquire::Mirror::RefreshInterval",360); - if(t + refresh > now) - { - if(Debug) - clog << "Mirror file is in RefreshInterval" << endl; - HasMirrorFile = true; - return true; - } - if(Debug) - clog << "Mirror file " << MirrorFile << " older than " << refresh << "min, re-download it" << endl; - } - - // not that great to use pkgAcquire here, but we do not have - // any other way right now - pkgAcquire Fetcher; - new pkgAcqFile(&Fetcher, fetch, "", 0, "", "", "", MirrorFile); - bool res = (Fetcher.Run() == pkgAcquire::Continue); - if(res) - HasMirrorFile = true; - Fetcher.Shutdown(); - return res; -} - -bool MirrorMethod::SelectMirror() -{ - // FIXME: make the mirror selection more clever, do not - // just use the first one! - ifstream in(MirrorFile.c_str()); - getline(in, Mirror); - if(Debug) - cerr << "Using mirror: " << Mirror << endl; - - UsedMirror = Mirror; - return true; + return name; } // MirrorMethod::Fetch - Fetch an item /*{{{*/ @@ -230,42 +386,78 @@ bool MirrorMethod::SelectMirror() depth. */ bool MirrorMethod::Fetch(FetchItem *Itm) { - // select mirror only once per session - if(!HasMirrorFile) + if(Debug) + clog << "MirrorMethod::Fetch()" << endl; + + // the http method uses Fetch(0) as a way to update the pipeline, + // just let it do its work in this case - Fetch() with a valid + // Itm will always run before the first Fetch(0) + if(Itm == NULL) + return HttpMethod::Fetch(Itm); + + // if we don't have the name of the mirror file on disk yet, + // calculate it now (can be derived from the uri) + if(MirrorFile.empty()) + MirrorFile = GetMirrorFileName(Itm->Uri); + + // download mirror file once (if we are after index files) + if(Itm->IndexFile && !DownloadedMirrorFile) { Clean(_config->FindDir("Dir::State::mirrors")); - GetMirrorFile(Itm->Uri); - SelectMirror(); + if (DownloadMirrorFile(Itm->Uri)) + RandomizeMirrorFile(MirrorFile); } - for (FetchItem *I = Queue; I != 0; I = I->Next) - { - if(I->Uri.find("mirror://") != string::npos) - I->Uri.replace(0,BaseUri.size(),Mirror); + if(AllMirrors.empty()) { + if(!InitMirrors()) { + // no valid mirror selected, something went wrong downloading + // from the master mirror site most likely and there is + // no old mirror file availalbe + return false; + } } + if(Itm->Uri.find("mirror://") != string::npos) + Itm->Uri.replace(0,BaseUri.size(), Mirror); + + if(Debug) + clog << "Fetch: " << Itm->Uri << endl << endl; + // now run the real fetcher return HttpMethod::Fetch(Itm); -}; +} void MirrorMethod::Fail(string Err,bool Transient) { - if(Queue->Uri.find("http://") != string::npos) - Queue->Uri.replace(0,Mirror.size(), BaseUri); + // FIXME: TryNextMirror is not ideal for indexfile as we may + // run into auth issues + + if (Debug) + clog << "Failure to get " << Queue->Uri << endl; + + // try the next mirror on fail (if its not a expected failure, + // e.g. translations are ok to ignore) + if (!Queue->FailIgnore && TryNextMirror()) + return; + + // all mirrors failed, so bail out + string s; + strprintf(s, _("[Mirror: %s]"), Mirror.c_str()); + SetIP(s); + + CurrentQueueUriToMirror(); pkgAcqMethod::Fail(Err, Transient); } void MirrorMethod::URIStart(FetchResult &Res) { - if(Queue->Uri.find("http://") != string::npos) - Queue->Uri.replace(0,Mirror.size(), BaseUri); + CurrentQueueUriToMirror(); pkgAcqMethod::URIStart(Res); } void MirrorMethod::URIDone(FetchResult &Res,FetchResult *Alt) { - if(Queue->Uri.find("http://") != string::npos) - Queue->Uri.replace(0,Mirror.size(), BaseUri); + CurrentQueueUriToMirror(); pkgAcqMethod::URIDone(Res, Alt); }