How to read query parameter value from URL using perl command

Question

In shell, I need to extract specific query parameter from URI.

I tried to play around with this to get "offset" value

echo "/mypath/index.php?offset=20&query=uro" | perl -MURI -le 'chomp($url = <>); print URI->new($url)->query_form("offset")'

But it always returns just offset=20&query=uro

Please help

Toto · Accepted Answer · 2012-03-02 14:12:11Z

4

query_form returns a hash, change your script to:

perl -MURI -le 'chomp($url = <>); print +{URI->new($url)->query_form}->{offset}'

In order to process multiple lines:

perl -MURI -nle 'print +{URI->new($_)->query_form}->{offset}'

edited Mar 2, 2012 at 14:12

answered Mar 1, 2012 at 10:24

Toto

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1 Comment

glaz666 Over a year ago

What is the way to print 'offset' for each line from output, ex. I have: echo "/mypath/index.php?offset=20&query=uro \n /mypath2/index.php?offset=30&query=uro"

daxim · Accepted Answer · 2012-03-01 11:32:58Z

3

You can use the URI::QueryParam module in addition to URI.The query_param method in the URI::QueryParam module gives you query parameter values.

echo "/mypath/index.php?offset=20&query=uro" | perl -MURI -le 'use URI::QueryParam; chomp($url = <>); print URI->new($url)->query_param(offset);'

edited Mar 1, 2012 at 11:32

daxim

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answered Mar 1, 2012 at 11:19

user966588

Comments

Eugene Yarmash · Accepted Answer · 2012-03-01 10:59:54Z

1

You can use the core CGI module:

perl -MCGI=param -e 'print param("offset")' "index.php?offset=20&query=uro"

answered Mar 1, 2012 at 10:59

Eugene Yarmash

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2 Comments

glaz666 Over a year ago

for a strange reason it doesn't work with piped input... It is important as I am extracting that string there

Eugene Yarmash Over a year ago

@glaz666 CGI expects a query as an argument to the script. You could use echo "/mypath/index.php?offset=20&query=uro" | perl -MCGI=param -e '@ARGV=<>; print param("offset")'

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