The final system build does not install an FTP or HTTP client for downloading files.
Some suggested clients include:
LFTP http://lftp.yar.ru/
NcFTP Client http://cblfs.cross-lfs.org/index.php/Ncftp
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.