#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;
+#include<sstream>
+
#include "mirror.h"
#include "http.h"
#include "apti18n.h"
* - always picks the first mirror from the list
* - call out to problem reporting script
* - supports "deb mirror://host/path/to/mirror-list/// dist component"
- * - use pkgAcqMethod::FailReason() to have a string representation
+ * - uses pkgAcqMethod::FailReason() to have a string representation
* of the failure that is also send to LP
*
* TODO:
*/
MirrorMethod::MirrorMethod()
- : HttpMethod(), HasMirrorFile(false)
+ : HttpMethod(), DownloadedMirrorFile(false)
{
};
if(Debug)
clog << "MirrorMethod::Clean(): " << Dir << endl;
+ if(Dir == "/")
+ return _error->Error("will not clean: '/'");
+
// read sources.list
pkgSourceList list;
list.ReadMainList();
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::GetMirrorFile(string mirror_uri_str)
+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://");
+
+ // 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<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;
+
+ 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 accross 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.find("http://") != 0)
+ continue;
+
+ AllMirrors.push_back(s);
+ }
+ Mirror = AllMirrors[0];
+ UsedMirror = Mirror;
+ return true;
+}
+
+string MirrorMethod::GetMirrorFileName(string mirror_uri_str)
{
/*
- a mirror_uri_str looks like this:
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<metaIndex *>::const_iterator I;
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;
- }
-
- // 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;
+ cerr << "mirror-file: " << name << 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 /*{{{*/
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);
}
projects / apt.git / blobdiff