Regex to get two values in string

Question

I have the following string:

<http://test.host/users?param1=1&param=1>; rel=\"rel_value\"

And I would like to get the URL and the rel value. That is:

http://test.host/users?param1=1&param=1

and

rel_value

I know how to get the URL:

string[/<.*?>/]

But failing to see how to get the rel. Any ideas on a regex that I could get both?

Does the string actually contain those backslashes?

Linuxios
– Linuxios

2015-10-08 18:39:59 +00:00
Commented Oct 8, 2015 at 18:39 — Linuxios
– Linuxios, Commented Oct 8, 2015 at 18:39
yes it does contain those backslashes

Hommer Smith
– Hommer Smith

2015-10-08 18:41:18 +00:00
Commented Oct 8, 2015 at 18:41 — Hommer Smith
– Hommer Smith, Commented Oct 8, 2015 at 18:41

Linuxios · Accepted Answer · 2015-10-08 18:45:03Z

4

If the string is guaranteed to have that format:

/<(.+)>; rel=\\\"(.+)\\\"/

To be used like so:

m = s.match(/<(.+)>; rel=\\\"(.+)\\\"/)
m[0] #=> http://test.host/users?param1=1&param=1
m[1] #=> rel_value

Additionally, you could just use two regexes to search for each thing in the string:

s[/(?<=<).+(?=>)/] #=> http://test.host/users?param1=1&param=1
s[/(?<=rel=\\\").+(?=\\\")/] #=> rel_value

(These use lookahead and lookbehind to not capture anything besides the values).

answered Oct 8, 2015 at 18:45

Linuxios

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David Dersigny · Accepted Answer · 2015-10-08 18:46:08Z

1

As you asked for a regex that does both:

<(.*)>.*rel=\\"(.*)\\"

The first capturing group contains the URL, and the second one the rel value. But you could just do one regex for each. For the URL:

<(.*)>

And for the rel value:

rel=\\"(.*)\\"

answered Oct 8, 2015 at 18:46

David Dersigny

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Comments

Cary Swoveland · Accepted Answer · 2015-10-08 22:05:13Z

0

There should be at least one non-regex solution:

str.tr('<>\\\"','').split(';\s+rel=')
  #=> ["http://test.host/users?param1=1&param=1; rel=rel_value"]

answered Oct 8, 2015 at 22:05

Cary Swoveland

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