#include <apt-pkg/hashes.h>
#include <apt-pkg/sourcelist.h>
+
+#include <algorithm>
#include <fstream>
#include <iostream>
+
#include <stdarg.h>
#include <sys/stat.h>
#include <sys/types.h>
+#include <sys/utsname.h>
#include <dirent.h>
using namespace std;
for(I=list.begin(); I != list.end(); I++)
{
string uri = (*I)->GetURI();
- if(uri.substr(0,strlen("mirror://")) != string("mirror://"))
+ if(uri.find("mirror://") != 0)
continue;
string BaseUri = uri.substr(0,uri.size()-1);
if (URItoFileName(BaseUri) == Dir->d_name)
bool MirrorMethod::DownloadMirrorFile(string mirror_uri_str)
{
- if(Debug)
- clog << "MirrorMethod::DownloadMirrorFile(): " << endl;
-
// 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(Debug)
+ clog << "MirrorMethod::DownloadMirrorFile(): '" << fetch << "'"
+ << " to " << MirrorFile << endl;
+
pkgAcquire Fetcher;
new pkgAcqFile(&Fetcher, fetch, "", 0, "", "", "", MirrorFile);
bool res = (Fetcher.Run() == pkgAcquire::Continue);
- if(res)
+ if(res) {
DownloadedMirrorFile = true;
+ chmod(MirrorFile.c_str(), 0644);
+ }
Fetcher.Shutdown();
+
+ if(Debug)
+ clog << "MirrorMethod::DownloadMirrorFile() success: " << res << endl;
+
return res;
}
-bool MirrorMethod::SelectNextMirror()
+// 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)
{
- if(Debug)
- cerr << "using mirror: " << Mirror << endl;
+ 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, i;
+ if(uname(&buf) == 0) {
+ for(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;
- Mirror = AllMirrors[0];
- UsedMirror = Mirror;
return false;
}
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
if (s.size() > 0)
AllMirrors.push_back(s);
}
- SelectNextMirror();
+ Mirror = AllMirrors[0];
+ UsedMirror = Mirror;
return true;
}
if(Itm->IndexFile && !DownloadedMirrorFile)
{
Clean(_config->FindDir("Dir::State::mirrors"));
- DownloadMirrorFile(Itm->Uri);
+ if (DownloadMirrorFile(Itm->Uri))
+ RandomizeMirrorFile(MirrorFile);
}
- if(Mirror.empty()) {
+ if(AllMirrors.empty()) {
if(!InitMirrors()) {
// no valid mirror selected, something went wrong downloading
// from the master mirror site most likely and there is
return false;
}
}
- if(Debug)
- clog << "selected mirror: " << Mirror << endl;
+ if(Itm->Uri.find("mirror://") != string::npos)
+ Itm->Uri.replace(0,BaseUri.size(), Mirror);
- for (FetchItem *I = Queue; I != 0; I = I->Next)
- {
- if(I->Uri.find("mirror://") != string::npos)
- I->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)
{
- // try the next mirror on fail
- string old_mirror = Mirror;
- if (SelectNextMirror())
- {
- Queue->Uri.replace(0, old_mirror.size(), Mirror);
+ // 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)
{
- if(Queue->Uri.find("http://") != string::npos)
- Queue->Uri.replace(0,Mirror.size(), BaseUri);
+ CurrentQueueUriToMirror();
pkgAcqMethod::URIDone(Res, Alt);
}
projects / apt.git / blobdiff