Parse text from this webpage in bash

Question

I want to write a bash script that can parse the version number of apps in the android appstore. For example this app, https://play.google.com/store/apps/details?id=com.alphonso.pulse&hl=en

How would I get the value '3.0.6' from the Current Version header on the right hand side of the page?

Here is the xpath to the `3.0.6`: `//*[@id="details-tab-1"]/div[1]/dl/dd[3]`. You'll need to find a way to parse out the webpage, and [regex is not your friend](http://stackoverflow.com/a/1732454/1529339) with html parsing. — Nick, Jan 18 '13 at 21:47
What if I wget the page? I could then match this line right? `Current Version:
3.0.6
` — thisiscrazy4, Jan 18 '13 at 21:50

Chris Seymour · Accepted Answer · 2013-01-18T22:33:53.407

5

$ site=https://play.google.com/store/apps/details?id=com.alphonso.pulse

$ curl -s $site | sed -rn 's/.*(Current Version:)[^0-9]*([0-9.]+).*/\1\2/p'
Current Version:3.0.6 

$ curl -s $site | sed -rn 's/.*Current Version:[^0-9]*([0-9.]+).*/\1/p'
3.0.6

edited Jan 18 '13 at 22:33

answered Jan 18 '13 at 21:57

Chris Seymour

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This isn't working for me. I get `sed: 1: "s/.*(Current Version:)[ ...": \1 not defined in the RE` followed by lots of html – thisiscrazy4 Jan 18 '13 at 22:07
1

I'm guessing you are running `OSX` then, try `sed -En 's/.*(Current Version:)[^0-9]*([0-9.]+).*/\1\2/p'` instead. – Chris Seymour Jan 18 '13 at 22:09
If I wanted to exclude "Current Version:" how would I modify it? Sorry..haven't used sed in a while. – thisiscrazy4 Jan 18 '13 at 22:29
1

Here you go `sed -rn 's/.*Current Version:[^0-9]*([0-9.]+).*/\1/p'` I'd appreciate a +1. – Chris Seymour Jan 18 '13 at 22:31

Parse text from this webpage in bash

1 Answers1