debian/README.ubuntu-dev:

[apt.git] / methods / mirror.cc

diff --git a/methods/mirror.cc b/methods/mirror.cc
index 4de9815222baed78da0ee748db4f046cf36a338e..9fe64fd7031c0a05c932ef44b7f12922fd20721f 100644 (file)
--- a/methods/mirror.cc
+++ b/methods/mirror.cc
@@ -14,37 +14,42 @@
 #include <apt-pkg/acquire.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/hashes.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 <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"
 
 using namespace std;
 
 #include "mirror.h"
 #include "http.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: 
  * TODO: 

+ * - 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
  * - better method to download than having a pkgAcquire interface here

- * - support keeping the mirror file around (evil listclearer strikes again)
- *   -> /var/lib/apt/mirrors dir? how to cleanup? by time?
- * - provide some TTL time until the mirror file is get again (1h? 6h?)
- * - deal with runing as non-root (we can't write to the lists dir then)
+ *   and better error handling there!
+ * - support more than http

  * - testing :)
  */
 
 MirrorMethod::MirrorMethod()
    : HttpMethod(), HasMirrorFile(false)
 {
  * - 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          /*{{{*/
 };
 
 // HttpMethod::Configuration - Handle a configuration message          /*{{{*/


@@ -60,16 +65,112 @@ bool MirrorMethod::Configuration(string Message)
 }
                                                                        /*}}}*/
 
 }
                                                                        /*}}}*/
 

+// 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 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;   
+}
+

 
 

-bool MirrorMethod::GetMirrorFile(string uri)
+bool MirrorMethod::GetMirrorFile(string mirror_uri_str)

 {
 {

-   string Marker = _config->Find("Acquire::Mirror::MagicMarker","///");
-   BaseUri = uri.substr(0,uri.find(Marker));
+   /* 
+    - 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
+   */
+   if(Debug)
+      std::cerr << "GetMirrorFile: " << 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);
+      }
+   }

    string fetch = BaseUri;
    fetch.replace(0,strlen("mirror://"),"http://");
 
    string fetch = BaseUri;
    fetch.replace(0,strlen("mirror://"),"http://");
 

-   MirrorFile = _config->FindDir("Dir::State::lists") + URItoFileName(BaseUri);
+   // get new file
+   MirrorFile = _config->FindDir("Dir::State::mirrors") + URItoFileName(BaseUri);

 
    if(Debug) 
    {
 
    if(Debug) 
    {


@@ -77,23 +178,49 @@ bool MirrorMethod::GetMirrorFile(string uri)
       cerr << "mirror-file: " << MirrorFile << endl;
    }
 
       cerr << "mirror-file: " << MirrorFile << endl;
    }
 

-   // FIXME: fetch it with curl
+   // 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);
    pkgAcquire Fetcher;
    new pkgAcqFile(&Fetcher, fetch, "", 0, "", "", "", MirrorFile);
    bool res = (Fetcher.Run() == pkgAcquire::Continue);

-   
-   if(res) 
+   if(res)

       HasMirrorFile = true;
    Fetcher.Shutdown();
       HasMirrorFile = true;
    Fetcher.Shutdown();

-   return true;
+   return res;

 }
 
 bool MirrorMethod::SelectMirror()
 {
 }
 
 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;
    ifstream in(MirrorFile.c_str());
    getline(in, Mirror);
    if(Debug)
       cerr << "Using mirror: " << Mirror << endl;

+
+   UsedMirror = Mirror;

    return true;
 }
 
    return true;
 }
 


@@ -103,9 +230,10 @@ bool MirrorMethod::SelectMirror()
    depth. */
 bool MirrorMethod::Fetch(FetchItem *Itm)
 {
    depth. */
 bool MirrorMethod::Fetch(FetchItem *Itm)
 {

-   // get mirror information
+   // select mirror only once per session

    if(!HasMirrorFile)
    {
    if(!HasMirrorFile)
    {

+      Clean(_config->FindDir("Dir::State::mirrors"));

       GetMirrorFile(Itm->Uri);
       SelectMirror();
    }
       GetMirrorFile(Itm->Uri);
       SelectMirror();
    }