// $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 <config.h>
+
+#include <apt-pkg/aptconfiguration.h>
#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 <apt-pkg/configuration.h>
+#include <apt-pkg/metaindex.h>
+#include <apt-pkg/strutl.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <algorithm>
#include <iostream>
-#include <stdarg.h>
+#include <fstream>
#include <sys/stat.h>
-#include <sys/types.h>
+#include <sys/utsname.h>
#include <dirent.h>
using namespace std;
+#include<sstream>
+
#include "mirror.h"
#include "http.h"
-#include "apti18n.h"
+#include <apti18n.h>
/*}}}*/
-/*
+/* Done:
+ * - works with http (only!)
+ * - always picks the first mirror from the list
+ * - call out to problem reporting script
+ * - supports "deb mirror://host/path/to/mirror-list/// dist component"
+ * - uses pkgAcqMethod::FailReason() to have a string representation
+ * of the failure that is also send to LP
+ *
* 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
+ * - 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
- * - 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?
+ * and better error handling there!
+ * - support more than http
* - testing :)
*/
MirrorMethod::MirrorMethod()
- : HttpMethod(), HasMirrorFile(false)
+ : HttpMethod(), DownloadedMirrorFile(false), Debug(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 /*{{{*/
// ---------------------------------------------------------------------
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..
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 Marker = _config->Find("Acquire::Mirror::MagicMarker","///");
- string BaseUri = uri.substr(0,uri.find(Marker));
+ string BaseUri = uri.substr(0,uri.size()-1);
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;
+ if (chdir(StartDir.c_str()) != 0)
+ return _error->Errno("chdir",_("Unable to change to %s"),StartDir.c_str());
+ return true;
}
-bool MirrorMethod::GetMirrorFile(string uri)
+bool MirrorMethod::DownloadMirrorFile(string /*mirror_uri_str*/)
{
- string Marker = _config->Find("Acquire::Mirror::MagicMarker","///");
- BaseUri = uri.substr(0,uri.find(Marker));
-
+ // 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://");
- // get new file
- MirrorFile = _config->FindDir("Dir::State::mirrors") + URItoFileName(BaseUri);
+#if 0 // no need for this, the getArchitectures() will also include the main
+ // arch
+ // append main architecture
+ fetch += "?arch=" + _config->Find("Apt::Architecture");
+#endif
- if(Debug)
- {
- cerr << "base-uri: " << BaseUri << endl;
- cerr << "mirror-file: " << MirrorFile << endl;
- }
+ // append all architectures
+ std::vector<std::string> vec = APT::Configuration::getArchitectures();
+ for (std::vector<std::string>::const_iterator I = vec.begin();
+ I != vec.end(); ++I)
+ if (I == vec.begin())
+ fetch += "?arch=" + (*I);
+ else
+ fetch += "&arch=" + (*I);
- // 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;
- }
+ // append the dist as a query string
+ if (Dist != "")
+ fetch += "&dist=" + Dist;
+
+ if(Debug)
+ clog << "MirrorMethod::DownloadMirrorFile(): '" << fetch << "'"
+ << " to " << MirrorFile << 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;
+ if(res) {
+ DownloadedMirrorFile = true;
+ chmod(MirrorFile.c_str(), 0644);
+ }
Fetcher.Shutdown();
+
+ if(Debug)
+ clog << "MirrorMethod::DownloadMirrorFile() success: " << res << endl;
+
return res;
}
-bool MirrorMethod::SelectMirror()
+// 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<string> 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<string>::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<string>::const_iterator mirror = AllMirrors.begin();
+ mirror != AllMirrors.end(); ++mirror)
+ {
+ if (Queue->Uri.find(*mirror) != 0)
+ continue;
+
+ vector<string>::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());
+ }
+
// 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());
- getline(in, Mirror);
- if(Debug)
- cerr << "Using mirror: " << Mirror << endl;
+ 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:
+ mirror://people.ubuntu.com/~mvo/apt/mirror/mirrors/dists/feisty/Release.gpg
+
+ - the matching source.list entry
+ deb mirror://people.ubuntu.com/~mvo/apt/mirror/mirrors feisty main
+
+ - we actually want to go after:
+ http://people.ubuntu.com/~mvo/apt/mirror/mirrors
+
+ And we need to save the BaseUri for later:
+ - mirror://people.ubuntu.com/~mvo/apt/mirror/mirrors
+
+ FIXME: what if we have two similar prefixes?
+ mirror://people.ubuntu.com/~mvo/mirror
+ mirror://people.ubuntu.com/~mvo/mirror2
+ then mirror_uri_str looks like:
+ mirror://people.ubuntu.com/~mvo/apt/mirror/dists/feisty/Release.gpg
+ mirror://people.ubuntu.com/~mvo/apt/mirror2/dists/feisty/Release.gpg
+ we search sources.list and find:
+ mirror://people.ubuntu.com/~mvo/apt/mirror
+ 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 << "GetMirrorFileName: " << mirror_uri_str << std::endl;
+
+ // read sources.list and find match
+ vector<metaIndex *>::const_iterator I;
+ pkgSourceList list;
+ list.ReadMainList();
+ for(I=list.begin(); I != list.end(); ++I)
+ {
+ string uristr = (*I)->GetURI();
+ if(Debug)
+ std::cerr << "Checking: " << uristr << std::endl;
+ if(uristr.substr(0,strlen("mirror://")) != string("mirror://"))
+ continue;
+ // find matching uri in sources.list
+ if(mirror_uri_str.substr(0,uristr.size()) == uristr)
+ {
+ if(Debug)
+ std::cerr << "found BaseURI: " << uristr << std::endl;
+ BaseUri = uristr.substr(0,uristr.size()-1);
+ Dist = (*I)->GetDist();
+ }
+ }
+ // get new file
+ name = _config->FindDir("Dir::State::mirrors") + URItoFileName(BaseUri);
+
+ if(Debug)
+ {
+ cerr << "base-uri: " << BaseUri << endl;
+ cerr << "mirror-file: " << name << endl;
+ }
+ return name;
+}
+
// 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)
+ 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)
{
- // FIXME: queue next mirror?
- ReportMirrorFailure(Err);
+ // 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);
- if(Queue->Uri.find("http://") != string::npos)
- Queue->Uri.replace(0,Mirror.size(), BaseUri);
+ 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)
{
- // 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);
+ CurrentQueueUriToMirror();
pkgAcqMethod::URIDone(Res, Alt);
}
-void MirrorMethod::ReportMirrorFailure(string FailCode)
-{
- // report that Queue->Uri failed
- std::cerr << "\nReportMirrorFailure: "
- << Queue->Uri
- << " FailCode: "
- << FailCode << std::endl;
-}
int main()
{
projects / apt.git / blobdiff