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Diff for /loncom/lond between versions 1.323 and 1.327

version 1.323, 2006/03/04 00:59:59 version 1.327, 2006/05/18 02:17:27
Line 31 Line 31
   
 use strict;  use strict;
 use lib '/home/httpd/lib/perl/';  use lib '/home/httpd/lib/perl/';
   use LONCAPA;
 use LONCAPA::Configuration;  use LONCAPA::Configuration;
   
 use IO::Socket;  use IO::Socket;
 use IO::File;  use IO::File;
 #use Apache::File;  #use Apache::File;
 use Symbol;  
 use POSIX;  use POSIX;
 use Crypt::IDEA;  use Crypt::IDEA;
 use LWP::UserAgent();  use LWP::UserAgent();
Line 53  use LONCAPA::ConfigFileEdit; Line 53  use LONCAPA::ConfigFileEdit;
 use LONCAPA::lonlocal;  use LONCAPA::lonlocal;
 use LONCAPA::lonssl;  use LONCAPA::lonssl;
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
 use Symbol;  
   
 my $DEBUG = 0;       # Non zero to enable debug log entries.  my $DEBUG = 0;       # Non zero to enable debug log entries.
   
Line 1049  sub _do_hash_untie { Line 1048  sub _do_hash_untie {
   
     sub _locking_hash_tie {      sub _locking_hash_tie {
  my ($file_prefix,$namespace,$how,$loghead,$what) = @_;   my ($file_prefix,$namespace,$how,$loghead,$what) = @_;
           my $lock_type=LOCK_SH;
  my ($lock);  # Are we reading or writing?
               if ($how eq &GDBM_READER()) {
  if ($how eq &GDBM_READER()) {  # We are reading
     $lock=LOCK_SH;             unless (open($sym,"$file_prefix.db.lock")) {
     $how=$how|&GDBM_NOLOCK();  # We don't have a lock file. This could mean
     #if the db doesn't exist we can't read from it  # - that there is no such db-file
     if (! -e "$file_prefix.db") {  # - that it does not have a lock file yet
  $! = 2;                 unless ((-e "$file_prefix.db") || (-e "$file_prefix.db.gz")) {
  return undef;  # No such file. Forget it.                
     }                     $! = 2;
  } elsif ($how eq &GDBM_WRCREAT()) {                     return undef;
     $lock=LOCK_EX;                 }
     $how=$how|&GDBM_NOLOCK();  # Apparently just no lock file yet. Make one
     if (! -e "$file_prefix.db") {                 open($sym,">>$file_prefix.db.lock");
  # doesn't exist but we need it to in order to successfully             } 
                 # lock it so bring it into existance          } elsif ($how eq &GDBM_WRCREAT()) {
  open(TOUCH,">>$file_prefix.db");  # We are writing
  close(TOUCH);             open($sym,">>$file_prefix.db.lock");
     }  # Writing needs exclusive lock
  } else {             $lock_type=LOCK_EX;
     &logthis("Unknown method $how for $file_prefix");          } else {
     die();             &logthis("Unknown method $how for $file_prefix");
  }             die();
               }
  $sym=&Symbol::gensym();  # If this is compressed, we will also need an exclusive lock
  open($sym,"$file_prefix.db");         if (-e "$file_prefix.db.gz") { $lock_type=LOCK_EX; }
  my $failed=0;  # Okay, try to obtain the lock we want
  eval {         my $failed=0;
     local $SIG{__DIE__}='DEFAULT';         eval {
     local $SIG{ALRM}=sub {              local $SIG{__DIE__}='DEFAULT';
  $failed=1;             local $SIG{ALRM}=sub {
  die("failed lock");                 $failed=1;
     };                 die("failed lock");
     alarm($lond_max_wait_time);             };
     flock($sym,$lock);             alarm($lond_max_wait_time);
     alarm(0);             flock($sym,$lock_type);
  };             alarm(0);
  if ($failed) {         };
     $! = 100; # throwing error # 100         if ($failed) {
     return undef;             $! = 100; # throwing error # 100
  }             return undef;
  return &_do_hash_tie($file_prefix,$namespace,$how,$loghead,$what);         }
   # The file is ours!
   # If it is archived, un-archive it now
          if (-e "$file_prefix.db.gz") {
              system("gunzip $file_prefix.db.gz");
      if (-e "$file_prefix.hist.gz") {
          system("gunzip $file_prefix.hist.gz");
      }
          }
   # Change access mode to non-blocking
          $how=$how|&GDBM_NOLOCK();
   # Go ahead and tie the hash
          return &_do_hash_tie($file_prefix,$namespace,$how,$loghead,$what);
     }      }
   
     sub _locking_hash_untie {      sub _locking_hash_untie {
Line 3240  sub restore_handler { Line 3251  sub restore_handler {
 &register_handler("restore", \&restore_handler, 0,1,0);  &register_handler("restore", \&restore_handler, 0,1,0);
   
 #  #
 #   Add a chat message to to a discussion board.  #   Add a chat message to a synchronous discussion board.
 #  #
 # Parameters:  # Parameters:
 #    $cmd                - Request keyword.  #    $cmd                - Request keyword.
 #    $tail               - Tail of the command. A colon separated list  #    $tail               - Tail of the command. A colon separated list
 #                          containing:  #                          containing:
 #                          cdom    - Domain on which the chat board lives  #                          cdom    - Domain on which the chat board lives
 #                          cnum    - Identifier of the discussion group.  #                          cnum    - Course containing the chat board.
 #                          post    - Body of the posting.  #                          newpost - Body of the posting.
   #                          group   - Optional group, if chat board is only 
   #                                    accessible in a group within the course 
 #   $client              - Socket open on the client.  #   $client              - Socket open on the client.
 # Returns:  # Returns:
 #   1    - Indicating caller should keep on processing.  #   1    - Indicating caller should keep on processing.
Line 3263  sub send_chat_handler { Line 3276  sub send_chat_handler {
           
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($cdom,$cnum,$newpost)=split(/\:/,$tail);      my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail);
     &chat_add($cdom,$cnum,$newpost);      &chat_add($cdom,$cnum,$newpost,$group);
     &Reply($client, "ok\n", $userinput);      &Reply($client, "ok\n", $userinput);
   
     return 1;      return 1;
Line 3272  sub send_chat_handler { Line 3285  sub send_chat_handler {
 &register_handler("chatsend", \&send_chat_handler, 0, 1, 0);  &register_handler("chatsend", \&send_chat_handler, 0, 1, 0);
   
 #  #
 #   Retrieve the set of chat messagss from a discussion board.  #   Retrieve the set of chat messages from a discussion board.
 #  #
 #  Parameters:  #  Parameters:
 #    $cmd             - Command keyword that initiated the request.  #    $cmd             - Command keyword that initiated the request.
Line 3282  sub send_chat_handler { Line 3295  sub send_chat_handler {
 #                       chat id        - Discussion thread(?)  #                       chat id        - Discussion thread(?)
 #                       domain/user    - Authentication domain and username  #                       domain/user    - Authentication domain and username
 #                                        of the requesting person.  #                                        of the requesting person.
   #                       group          - Optional course group containing
   #                                        the board.      
 #   $client           - Socket open on the client program.  #   $client           - Socket open on the client program.
 # Returns:  # Returns:
 #    1     - continue processing  #    1     - continue processing
Line 3294  sub retrieve_chat_handler { Line 3309  sub retrieve_chat_handler {
   
     my $userinput = "$cmd:$tail";      my $userinput = "$cmd:$tail";
   
     my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail);      my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail);
     my $reply='';      my $reply='';
     foreach (&get_chat($cdom,$cnum,$udom,$uname)) {      foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) {
  $reply.=&escape($_).':';   $reply.=&escape($_).':';
     }      }
     $reply=~s/\:$//;      $reply=~s/\:$//;
Line 5173  sub status { Line 5188  sub status {
     $0='lond: '.$what.' '.$local;      $0='lond: '.$what.' '.$local;
 }  }
   
 # -------------------------------------------------------- Escape Special Chars  
   
 sub escape {  
     my $str=shift;  
     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;  
     return $str;  
 }  
   
 # ----------------------------------------------------- Un-Escape Special Chars  
   
 sub unescape {  
     my $str=shift;  
     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;  
     return $str;  
 }  
   
 # ----------------------------------------------------------- Send USR1 to lonc  # ----------------------------------------------------------- Send USR1 to lonc
   
 sub reconlonc {  sub reconlonc {
Line 5875  sub addline { Line 5874  sub addline {
 }  }
   
 sub get_chat {  sub get_chat {
     my ($cdom,$cname,$udom,$uname)=@_;      my ($cdom,$cname,$udom,$uname,$group)=@_;
   
     my @entries=();      my @entries=();
     my $hashref = &tie_user_hash($cdom, $cname, 'nohist_chatroom',      my $namespace = 'nohist_chatroom';
       my $namespace_inroom = 'nohist_inchatroom';
       if (defined($group)) {
           $namespace .= '_'.$group;
           $namespace_inroom .= '_'.$group;
       }
       my $hashref = &tie_user_hash($cdom, $cname, $namespace,
  &GDBM_READER());   &GDBM_READER());
     if ($hashref) {      if ($hashref) {
  @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));   @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
Line 5886  sub get_chat { Line 5891  sub get_chat {
     }      }
     my @participants=();      my @participants=();
     my $cutoff=time-60;      my $cutoff=time-60;
     $hashref = &tie_user_hash($cdom, $cname, 'nohist_inchatroom',      $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom,
       &GDBM_WRCREAT());        &GDBM_WRCREAT());
     if ($hashref) {      if ($hashref) {
         $hashref->{$uname.':'.$udom}=time;          $hashref->{$uname.':'.$udom}=time;
Line 5901  sub get_chat { Line 5906  sub get_chat {
 }  }
   
 sub chat_add {  sub chat_add {
     my ($cdom,$cname,$newchat)=@_;      my ($cdom,$cname,$newchat,$group)=@_;
     my @entries=();      my @entries=();
     my $time=time;      my $time=time;
     my $hashref = &tie_user_hash($cdom, $cname, 'nohist_chatroom',      my $namespace = 'nohist_chatroom';
       my $logfile = 'chatroom.log';
       if (defined($group)) {
           $namespace .= '_'.$group;
           $logfile = 'chatroom_'.$group.'.log';
       }
       my $hashref = &tie_user_hash($cdom, $cname, $namespace,
  &GDBM_WRCREAT());   &GDBM_WRCREAT());
     if ($hashref) {      if ($hashref) {
  @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));   @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref));
Line 5927  sub chat_add { Line 5938  sub chat_add {
  }   }
  {   {
     my $proname=&propath($cdom,$cname);      my $proname=&propath($cdom,$cname);
     if (open(CHATLOG,">>$proname/chatroom.log")) {       if (open(CHATLOG,">>$proname/$logfile")) { 
  print CHATLOG ("$time:".&unescape($newchat)."\n");   print CHATLOG ("$time:".&unescape($newchat)."\n");
     }      }
     close(CHATLOG);      close(CHATLOG);
Line 6632  to the client, and the connection is clo Line 6643  to the client, and the connection is clo
 IO::Socket  IO::Socket
 IO::File  IO::File
 Apache::File  Apache::File
 Symbol  
 POSIX  POSIX
 Crypt::IDEA  Crypt::IDEA
 LWP::UserAgent()  LWP::UserAgent()
Removed from v.1.323  
changed lines
  Added in v.1.327

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