14.2. Download Client

Some suggested clients include:

• Curl http://cblfs.clfs.org/index.php/Curl

• Inetutils http://cblfs.clfs.org/index.php/Inetutils

• LFTP http://lftp.yar.ru/

• Links http://cblfs.clfs.org/index.php/Links

• Lynx http://cblfs.clfs.org/index.php/Lynx

• NcFTP Client http://cblfs.clfs.org/index.php/Ncftp

• Wget http://cblfs.clfs.org/index.php/Wget

• BASH - A user can use net redirections (if not disabled when building bash in the final system) to download wget or another program.

  cat > download.sh << "EOF"
  #!/bin/bash
  
  WGET_VERSION='1.14'
  WGET_HOSTNAME='ftp.gnu.org'
  exec {HTTP_FD}<>/dev/tcp/${WGET_HOSTNAME}/80
  echo -ne "GET /gnu/wget/wget-${WGET_VERSION}.tar.xz HTTP/1.1\r\nHost: "\
      ${WGET_HOSTNAME}'\r\nUser-Agent: '\
      'bash/'${BASH_VERSION}'\r\n\r\n'  >&${HTTP_FD}
  sed -e '1,/^.$/d' <&${HTTP_FD} >wget-${WGET_VERSION}.tar.xz
  EOF

• GAWK

  cat > gawkdl.sh << "EOF"
  #!/bin/bash
  
  gawk 'BEGIN {
    NetService = "/inet/tcp/0/mirror.anl.gov/80"
    print "GET /pub/gnu/wget/wget-1.14.tar.xz" |& NetService
    while ((NetService |& getline) > 0)
      print $0
    close(NetService)
  }' > binary
  
  gawk '{q=p;p=$0}NR>1{print q}END{ORS = ""; print p}' binary > wget-1.14.tar.xz
  
  rm binary
  EOF

• PERL with HTTP::Tiny (Included with final system PERL install).

  cat > download.pl << "EOF"
  #!/usr/bin/perl
  
  use HTTP::Tiny;
  my $http = HTTP::Tiny->new;
  my $response;
  
  $response = $http->mirror('http://ftp.gnu.org/gnu/wget/wget-1.14.tar.xz', 'wget-1.14.tar.xz');
  die "Failed!\n" unless $response->{success};
  print "Unchanged!\n" if $response->{status} eq '304';
  EOF

  Or use this:

  perl -MHTTP::Tiny -E 'say HTTP::Tiny->new->get(shift)->{content}' "http://ftp.gnu.org/gnu/wget/wget-1.14.tar.xz" > binary
  perl -e 'local $/; $_ = <>; s/\n$//; print' binary > wget-1.14.tar.xz
  rm binary

• PERL with LWP: Run cpan and manually configure the client. Run install LWP while in the CPAN shell.

  Refer to http://www.bioinfo-user.org.uk/dokuwiki/doku.php/projects/wgetpl for wgetpl.