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- // -*- mode: cpp; mode: fold -*-
- // Description /*{{{*/
- // $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.
-
- ##################################################################### */
- /*}}}*/
- // Include Files /*{{{*/
- #include <apt-pkg/fileutl.h>
- #include <apt-pkg/acquire-method.h>
- #include <apt-pkg/acquire-item.h>
- #include <apt-pkg/acquire.h>
- #include <apt-pkg/error.h>
- #include <apt-pkg/hashes.h>
- #include <apt-pkg/sourcelist.h>
- #include <fstream>
- #include <iostream>
- #include <stdarg.h>
- #include <sys/stat.h>
- #include <sys/types.h>
- #include <dirent.h>
- using namespace std;
- #include "mirror.h"
- #include "http.h"
- #include "apti18n.h"
- /*}}}*/
- /*
- * TODO:
- * - what about gpgv failures? better standard format for errors
- to send back to LP
- #OR#
- * - implement it at the pkgAcquire::Item::Failed() level but then
- we need to send back what uri exactly was failing
- [mvo: the problem with this approach is ::Failed() is not really
- called for all failures :/ e.g. md5sum mismatch in a archive
- is not]
- * - deal with runing 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
- * - magicmarker is (a bit) evil, maybe just use a similar approach as in
- clean and read the sources.list and use the GetURI() method to find
- the prefix?
- * - testing :)
- */
- MirrorMethod::MirrorMethod()
- : HttpMethod(), HasMirrorFile(false)
- {
- #if 0
- HasMirrorFile=true;
- BaseUri="mirror://people.ubuntu.com/~mvo/mirror/mirrors";
- MirrorFile="/var/lib/apt/lists/people.ubuntu.com_%7emvo_apt_mirror_mirrors";
- Mirror="http://de.archive.ubuntu.com/ubuntu/";
- #endif
- };
- // HttpMethod::Configuration - Handle a configuration message /*{{{*/
- // ---------------------------------------------------------------------
- /* We stash the desired pipeline depth */
- bool MirrorMethod::Configuration(string Message)
- {
- if (pkgAcqMethod::Configuration(Message) == false)
- return false;
- Debug = _config->FindB("Debug::Acquire::mirror",false);
-
- return true;
- }
- /*}}}*/
- // clean the mirrors dir based on ttl information
- bool MirrorMethod::Clean(string Dir)
- {
- vector<metaIndex *>::const_iterator I;
- if(Debug)
- clog << "MirrorMethod::Clean(): " << Dir << endl;
- // read sources.list
- pkgSourceList list;
- list.ReadMainList();
- 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..
- if (strcmp(Dir->d_name,"lock") == 0 ||
- strcmp(Dir->d_name,"partial") == 0 ||
- strcmp(Dir->d_name,".") == 0 ||
- strcmp(Dir->d_name,"..") == 0)
- continue;
- // see if we have that uri
- for(I=list.begin(); I != list.end(); I++)
- {
- string uri = (*I)->GetURI();
- if(uri.substr(0,strlen("mirror://")) != string("mirror://"))
- continue;
- string Marker = _config->Find("Acquire::Mirror::MagicMarker","///");
- string BaseUri = uri.substr(0,uri.find(Marker));
- if (URItoFileName(BaseUri) == Dir->d_name)
- break;
- }
- // nothing found, nuke it
- if (I == list.end())
- unlink(Dir->d_name);
- };
-
- chdir(StartDir.c_str());
- closedir(D);
- return true;
- }
- bool MirrorMethod::GetMirrorFile(string uri)
- {
- string Marker = _config->Find("Acquire::Mirror::MagicMarker","///");
- BaseUri = uri.substr(0,uri.find(Marker));
- string fetch = BaseUri;
- fetch.replace(0,strlen("mirror://"),"http://");
- // get new file
- MirrorFile = _config->FindDir("Dir::State::mirrors") + URItoFileName(BaseUri);
- if(Debug)
- {
- cerr << "base-uri: " << BaseUri << endl;
- cerr << "mirror-file: " << MirrorFile << 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;
- return true;
- }
- // MirrorMethod::Fetch - Fetch an item /*{{{*/
- // ---------------------------------------------------------------------
- /* This adds an item to the pipeline. We keep the pipeline at a fixed
- depth. */
- bool MirrorMethod::Fetch(FetchItem *Itm)
- {
- // select mirror only once per session
- if(!HasMirrorFile)
- {
- Clean(_config->FindDir("Dir::State::mirrors"));
- GetMirrorFile(Itm->Uri);
- SelectMirror();
- }
- for (FetchItem *I = Queue; I != 0; I = I->Next)
- {
- if(I->Uri.find("mirror://") != string::npos)
- I->Uri.replace(0,BaseUri.size(),Mirror);
- }
- // now run the real fetcher
- return HttpMethod::Fetch(Itm);
- };
- void MirrorMethod::Fail(string Err,bool Transient)
- {
- // FIXME: queue next mirror?
- ReportMirrorFailure(Err);
- if(Queue->Uri.find("http://") != string::npos)
- Queue->Uri.replace(0,Mirror.size(), BaseUri);
- pkgAcqMethod::Fail(Err, Transient);
- }
- void MirrorMethod::URIStart(FetchResult &Res)
- {
- if(Queue->Uri.find("http://") != string::npos)
- Queue->Uri.replace(0,Mirror.size(), BaseUri);
- pkgAcqMethod::URIStart(Res);
- }
- void MirrorMethod::URIDone(FetchResult &Res,FetchResult *Alt)
- {
- // FIXME: queue next mirror?
- if(Queue->ExpectedMD5 != "" && Res.MD5Sum != Queue->ExpectedMD5)
- ReportMirrorFailure("499 Hash mismatch");
- if(Queue->Uri.find("http://") != string::npos)
- Queue->Uri.replace(0,Mirror.size(), BaseUri);
- pkgAcqMethod::URIDone(Res, Alt);
- }
- void MirrorMethod::ReportMirrorFailure(string FailCode)
- {
- // report that Queue->Uri failed
- std::cerr << "\nReportMirrorFailure: "
- << Queue->Uri
- << " FailCode: "
- << FailCode << std::endl;
- #if 0 // FIXME: do not use system, make sure to properly encode
- // URI/FailCode, do not hardcode the submit url
- system("curl -d url=" + Queue->Uri +
- " -d FailureCode=" + FailCode +
- " http://localhost:8000/ &");
- #endif
- }
- int main()
- {
- setlocale(LC_ALL, "");
- MirrorMethod Mth;
- return Mth.Loop();
- }
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