Forum: Ruby new to ruby.. need a code

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(Guest)
on 2006-04-01 15:06
(Received via mailing list)
Hi all

I am new to Ruby. Found it as an intersting language. Can anyone help
me with a simple code in Ruby to check for all the dead and live links
in a website ?

Thanks
Rati
Patrick H. (Guest)
on 2006-04-01 18:40
(Received via mailing list)
On 4/1/06, removed_email_address@domain.invalid 
<removed_email_address@domain.invalid> wrote:
>
A wonderful language, a sort of rough request here is some (very)
simple code to get you started, using some great ruby libraries,
including rubyful soup (http://www.crummy.com/software/RubyfulSoup/),
which is available as a gem. As written it only checks one page, you
would need to make it "walk" the links to recursively check a whole
site.

Hope it helps
pth

require 'open-uri'
require 'uri'
require 'rubyful_soup'

url = 'http://www.yahoo.com/'
uri = URI.parse(url)
html = open(uri).read
soup = BeautifulSoup.new(html)

#Search the soup
links = soup.find_all('a').map { |a| a['href'] }

# Remove javascript
links.delete_if { |href| href =~ /javascript/ }

links.each do |l|
  # resolve relative paths (there is probably a better way)
  link = URI.parse(l)
  link.scheme = 'http' unless link.scheme
  link.host = uri.host unless link.host
  link.path = uri.path + link.path unless link.path[0] == ?/
  link = URI.parse(link.to_s)

  # check the link
  begin
    open(link).read
    # if we made it here the link is probably good
  rescue Exception => e
    puts "#{link.to_s}: #{e.to_s}"
  end
end
(Guest)
on 2006-04-01 20:21
(Received via mailing list)
Thank you. Will take care in future to not post a rough request :-)

Thanks again for this extended help.
David V. (Guest)
on 2006-04-02 00:08
(Received via mailing list)
DÅ?a Sobota 01 Apríl 2006 16:39 Patrick H. napísal:
> A wonderful language, a sort of rough request here is some (very)
> require 'uri'
> # Remove javascript
>   # check the link
>   begin
>     open(link).read
>     # if we made it here the link is probably good
>   rescue Exception => e
>     puts "#{link.to_s}: #{e.to_s}"
>   end
> end

Yay for intuitive and descriptive class and library names, eh?

David V.
Patrick H. (Guest)
on 2006-04-02 04:41
(Received via mailing list)
On 4/1/06, removed_email_address@domain.invalid 
<removed_email_address@domain.invalid> wrote:
> Thank you. Will take care in future to not post a rough request :-)
>
> Thanks again for this extended help.
>
>
>

You are very welcome. And you are always welcome to request help. So I
don't come off sounding too harsh, let me explain. This is a friendly
community, generally populated by programmers and people striving to
become programmers, so when asking for assistance in this manner, you
will often receive more assistance when you show that you have spent a
little time attempting to do this yourself, or asking for guidance on
how to get started.

As for the name rubyful_soup there are other better named libraries,
but this is based upon a Python library (same author) called Beautiful
Soup -- its claim to fame is that it will handle invalid markup, that
will give most other parsers fits (so it is useful in the real world
when dealing with other peoples "html"). I knew the library because I
had read about it here.

Good luck again
pth
Robin S. (Guest)
on 2006-04-02 05:57
(Received via mailing list)
Hi,

> links.each do |l|
>   # resolve relative paths (there is probably a better way)
Yes there is, see below :)

>   link = URI.parse(l)
>   link.scheme = 'http' unless link.scheme
>   link.host = uri.host unless link.host
>   link.path = uri.path + link.path unless link.path[0] == ?/
>   link = URI.parse(link.to_s)
link = uri.merge(l)

   Robin
Patrick H. (Guest)
on 2006-04-02 07:02
(Received via mailing list)
On 4/1/06, Robin S. <removed_email_address@domain.invalid> wrote:
> >   link = URI.parse(link.to_s)
> link = uri.merge(l)
>
>    Robin
>
>

Thanks I knew there had to be :-), I don't use URI much.

pth
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