Perl抓取网页信息
发布时间:2020-12-16 00:04:29 所属栏目:大数据 来源:网络整理
导读:demo: #!/usr/bin/perl -w# Perl pragma to restrict unsafe constructsuse strict;# use LWP::UserAgent modeluse LWP::UserAgent;# main functionsub main { # get params # @_ # Within a subroutine the array @_ contains the parameters passed to th
demo: #!/usr/bin/perl -w # Perl pragma to restrict unsafe constructs use strict; # use LWP::UserAgent model use LWP::UserAgent; # main function sub main { # get params # @_ # Within a subroutine the array @_ contains the parameters passed to that subroutine. # Inside a subroutine,@_ is the default array for the array operators push,pop,shift,and unshift. my $url = 'http://www.taobao.com'; die "no url param!n" unless $url; # create LWP::UserAgent object my $ua = LWP::UserAgent->new; # set connect timeout $ua->timeout(20); # set User-Agent header $ua->agent("Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; SV1; .NET CLR 2.0.50727)"); # send url use get mothed,and store response at var $resp my $resp = $ua->get($url); # check response if ($resp->is_success) { # get response content(html source code) my $content = $resp->decoded_content; # use Regex get page title from $content if ( $content =~ m{<title>(.*)</title>}si ) { # <title>(.+?)</title> (.+?) match title string,use () to store this str at a special variable $1 (this is a perl variable ),# The bracketing construct ( ... ) creates capture groups (also referred to as capture buffers). To refer to the current contents of a group later on,within the same pattern,use $1 for the first,$2 for the second,and so on. my $head = $1; print "find page title : $headn"; } else { print "no page title for url : $urln"; } } else { #display status information and exit die $resp->status_line; } } # pass params to main function,# @ARGV # The array @ARGV contains the command-line arguments intended for the script. main(@ARGV); (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |