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linux下如何实现internet下载功能,即linux有没有windows wininet这样的包
来源: 互联网 发布时间:2016-03-04
本文导语: linux下如何实现internet下载功能,即linux有没有windows wininet这样的包 | openwrt里面有一个download.pl你可以参考一下! #!/usr/bin/perl # # Copyright (C) 2006 OpenWrt.org # # This is free software, licensed und...
linux下如何实现internet下载功能,即linux有没有windows wininet这样的包
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openwrt里面有一个download.pl你可以参考一下!
#!/usr/bin/perl
#
# Copyright (C) 2006 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
use strict;
use warnings;
my $target = shift @ARGV;
my $filename = shift @ARGV;
my $md5sum = shift @ARGV;
my @mirrors;
my $ok;
@ARGV > 0 or die "Syntax: $0 [ ...]n";
sub which($) {
my $prog = shift;
my $res = `which $prog`;
$res or return undef;
$res =~ /^no / and return undef;
$res =~ /not found/ and return undef;
return $res;
}
my $md5cmd = which("md5sum");
$md5cmd or $md5cmd = which("md5");
$md5cmd or die 'no md5 checksum program found, please install md5 or md5sum';
chomp $md5cmd;
sub download
{
my $mirror = shift;
my $options = $ENV{WGET_OPTIONS};
$options or $options = "";
open WGET, "wget -t1 --timeout=20 $options -O- "$mirror/$filename" |" or die "Cannot launch wget.n";
open MD5SUM, "| $md5cmd > "$target/$filename.md5sum"" or die "Cannot launch md5sum.n";
open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!n";
my $buffer;
while (read WGET, $buffer, 1048576) {
print MD5SUM $buffer;
print OUTPUT $buffer;
}
close MD5SUM;
close WGET;
close OUTPUT;
if (($? >> 8) != 0 ) {
print STDERR "Download failed.n";
cleanup();
return;
}
my $sum = `cat "$target/$filename.md5sum"`;
$sum =~ /^(w+)s*/ or die "Could not generate md5sumn";
$sum = $1;
if (($md5sum =~ /w{32}/) and ($sum ne $md5sum)) {
print STDERR "MD5 sum of the downloaded file does not match - deleting download.n";
cleanup();
return;
}
unlink "$target/$filename";
system("mv "$target/$filename.dl" "$target/$filename"");
cleanup();
}
sub cleanup
{
unlink "$target/$filename.dl";
unlink "$target/$filename.md5sum";
}
foreach my $mirror (@ARGV) {
if ($mirror =~ /^@SF/(.+)$/) {
my $sfpath = $1;
open SF, "wget -t1 -q -O- 'http://prdownloads.sourceforge.net/$sfpath/$filename' |";
while () {
/RADIO NAME=use_default VALUE=(w+) OnClick="form.submit()">/ or
/type="radio" name="use_default" value="(w+)" onclick="form.submit()"/>/ and do {
push @mirrors, "http://$1.dl.sourceforge.net/sourceforge/$sfpath";
};
/Download/ and do {
push @mirrors, "http://$1.dl.sourceforge.net/sourceforge/$sfpath";
};
}
push @mirrors, "http://dl.sourceforge.net/sourceforge/$sfpath";
close SF;
} elsif ($mirror =~ /^@GNU/(.+)$/) {
my $gnupath = $1;
push @mirrors, "ftp://ftp.gnu.org/gnu/$gnupath";
push @mirrors, "ftp://ftp.belnet.be/mirror/ftp.gnu.org/gnu/$gnupath";
push @mirrors, "ftp://ftp.mirror.nl/pub/mirror/gnu/$gnupath";
push @mirrors, "http://mirror.switch.ch/ftp/mirror/gnu/$gnupath";
push @mirrors, "ftp://ftp.uu.net/archive/systems/gnu/$gnupath";
push @mirrors, "ftp://ftp.eu.uu.net/pub/gnu/$gnupath";
push @mirrors, "ftp://ftp.leo.org/pub/comp/os/unix/gnu/$gnupath";
push @mirrors, "ftp://ftp.digex.net/pub/gnu/$gnupath";
} else {
push @mirrors, $mirror;
}
}
#push @mirrors, 'http://mirror1.openwrt.org/';
push @mirrors, 'http://mirror2.openwrt.org/sources';
push @mirrors, 'http://downloads.openwrt.org/sources/';
while (!$ok) {
my $mirror = shift @mirrors;
$mirror or die "No more mirrors to try - giving up.n";
download($mirror);
-f "$target/$filename" and $ok = 1;
}
$SIG{INT} = &cleanup;
#!/usr/bin/perl
#
# Copyright (C) 2006 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
use strict;
use warnings;
my $target = shift @ARGV;
my $filename = shift @ARGV;
my $md5sum = shift @ARGV;
my @mirrors;
my $ok;
@ARGV > 0 or die "Syntax: $0 [ ...]n";
sub which($) {
my $prog = shift;
my $res = `which $prog`;
$res or return undef;
$res =~ /^no / and return undef;
$res =~ /not found/ and return undef;
return $res;
}
my $md5cmd = which("md5sum");
$md5cmd or $md5cmd = which("md5");
$md5cmd or die 'no md5 checksum program found, please install md5 or md5sum';
chomp $md5cmd;
sub download
{
my $mirror = shift;
my $options = $ENV{WGET_OPTIONS};
$options or $options = "";
open WGET, "wget -t1 --timeout=20 $options -O- "$mirror/$filename" |" or die "Cannot launch wget.n";
open MD5SUM, "| $md5cmd > "$target/$filename.md5sum"" or die "Cannot launch md5sum.n";
open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!n";
my $buffer;
while (read WGET, $buffer, 1048576) {
print MD5SUM $buffer;
print OUTPUT $buffer;
}
close MD5SUM;
close WGET;
close OUTPUT;
if (($? >> 8) != 0 ) {
print STDERR "Download failed.n";
cleanup();
return;
}
my $sum = `cat "$target/$filename.md5sum"`;
$sum =~ /^(w+)s*/ or die "Could not generate md5sumn";
$sum = $1;
if (($md5sum =~ /w{32}/) and ($sum ne $md5sum)) {
print STDERR "MD5 sum of the downloaded file does not match - deleting download.n";
cleanup();
return;
}
unlink "$target/$filename";
system("mv "$target/$filename.dl" "$target/$filename"");
cleanup();
}
sub cleanup
{
unlink "$target/$filename.dl";
unlink "$target/$filename.md5sum";
}
foreach my $mirror (@ARGV) {
if ($mirror =~ /^@SF/(.+)$/) {
my $sfpath = $1;
open SF, "wget -t1 -q -O- 'http://prdownloads.sourceforge.net/$sfpath/$filename' |";
while () {
/RADIO NAME=use_default VALUE=(w+) OnClick="form.submit()">/ or
/type="radio" name="use_default" value="(w+)" onclick="form.submit()"/>/ and do {
push @mirrors, "http://$1.dl.sourceforge.net/sourceforge/$sfpath";
};
/Download/ and do {
push @mirrors, "http://$1.dl.sourceforge.net/sourceforge/$sfpath";
};
}
push @mirrors, "http://dl.sourceforge.net/sourceforge/$sfpath";
close SF;
} elsif ($mirror =~ /^@GNU/(.+)$/) {
my $gnupath = $1;
push @mirrors, "ftp://ftp.gnu.org/gnu/$gnupath";
push @mirrors, "ftp://ftp.belnet.be/mirror/ftp.gnu.org/gnu/$gnupath";
push @mirrors, "ftp://ftp.mirror.nl/pub/mirror/gnu/$gnupath";
push @mirrors, "http://mirror.switch.ch/ftp/mirror/gnu/$gnupath";
push @mirrors, "ftp://ftp.uu.net/archive/systems/gnu/$gnupath";
push @mirrors, "ftp://ftp.eu.uu.net/pub/gnu/$gnupath";
push @mirrors, "ftp://ftp.leo.org/pub/comp/os/unix/gnu/$gnupath";
push @mirrors, "ftp://ftp.digex.net/pub/gnu/$gnupath";
} else {
push @mirrors, $mirror;
}
}
#push @mirrors, 'http://mirror1.openwrt.org/';
push @mirrors, 'http://mirror2.openwrt.org/sources';
push @mirrors, 'http://downloads.openwrt.org/sources/';
while (!$ok) {
my $mirror = shift @mirrors;
$mirror or die "No more mirrors to try - giving up.n";
download($mirror);
-f "$target/$filename" and $ok = 1;
}
$SIG{INT} = &cleanup;
|
libcurl很好很强大~~~
可以参考下wget源代码:)linux我一般用wget来下载
可以参考下wget源代码:)linux我一般用wget来下载