From: "lrlebron@..." <lrlebron@...>
Date: 2007-09-02T04:30:05+09:00
Subject: Re: Parsing query parameters from hyperlink

On Sep 1, 2:15 pm, Aaron Patterson <aa...@tenderlovemaking.com> wrote:
> On Sun, Sep 02, 2007 at 04:00:20AM +0900, Robert Klemme wrote:
> > On 01.09.2007 19:34, lrleb...@gmail.com wrote:
> > >I am trying to parse strings like this
> > ><a href='showmono.asp?cpnum=1022&ampmonotype=comb' target='main'>
>
> > >I need to get the cpnum value (555)
>
> > >I am using the following function
>
> > >def get_drugId(link)
> > >     arrParts = link.html.split('?')
> > >     cpnum = arrParts[1].split('&amp')
> > >     cpnumparts= cpnum[0].split("=")
> > >     drugId = cpnumparts[1]
> > >  end
>
> > >but I imagine there is a simpler way to do this. Also, I would like
> > >something more flexible that would return all the query parameters (if
> > >there are more than one) in an array or a hash.
>
> > >Any ideas?
>
> > The std lib:
>
> > require 'uri'
>
> > irb(main):006:0> u=URI.parse("http://foo/bar?dodo=1&dada=2")
> > => #<URI::HTTP:0x3ff9814a URL:http://foo/bar?dodo=1&dada=2>
> > irb(main):007:0> u.query
> > => "dodo=1&dada=2"
> > irb(main):008:0> u.query.split('&')
> > => ["dodo=1", "dada=2"]
> > ...
>
> Query strings are allowed to use semicolons as delimeters, not to
> mention you must handle multiple values per key. I recommend using the
> CGI library with the URI library:
>
>   irb(main):001:0> require 'uri'
>   => true
>   irb(main):002:0> require 'cgi'
>   => true
>   irb(main):003:0> CGI.parse(URI.parse('http://foo/?a=b&b=c').query)
>   => {"a"=>["b"], "b"=>["c"]}
>   irb(main):004:0> CGI.parse(URI.parse('http://foo/?a=b;b=c').query)
>   => {"a"=>["b"], "b"=>["c"]}
>   irb(main):005:0> CGI.parse(URI.parse('http://foo/?b=a;b=c').query)
>   => {"b"=>["a", "c"]}
>   irb(main):006:0>
>
> --
> Aaron Pattersonhttp://tenderlovemaking.com/- Hide quoted text -
>
> - Show quoted text -

This would work if the string where a proper url. But it is a
hyperlink.