Ruby on Rails Popen output conversion

Question

I'm stuck trying to convert an array to a string. Ultimately, what I need to do is:

Convert the array to string
Remove the \n characters
Remove the quotes
Place each line on a newline in the view

I should also say that I'm trying to do this without creating a temp file to read from.

tools_controller.rb

def ping_host(host)
  f = IO.Popen("ping -c 3 #{host}")
  @output = f.readlines
  return @output
end

views/tools/ping.html.erb

<%= @output %>

This works fine and dandy, however, the output presented in the view leaves much to be desired:

["PING 10.10.10.1 (10.10.10.1): 56 data bytes\n", "64 bytes from 10.10.10.1: icmp_seq=0 ttl=64 time=1.614 ms\n", "64 bytes from 10.10.10.1: icmp_seq=1 ttl=64 time=1.716 ms\n", "64 bytes from 10.10.10.1: icmp_seq=2 ttl=64 time=1.658 ms\n", "\n", "--- 10.10.10.1 ping statistics ---\n", "3 packets transmitted, 3 packets received, 0.0% packet loss\n", "round-trip min/avg/max/stddev = 1.614/1.663/1.716/0.042 ms\n"]

I'm trying to figure out how to get it into a format like this:

PING 10.10.10.1 (10.10.10.1): 56 data bytes
64 bytes from 10.10.10.1: icmp_seq=0 ttl=64 time=1.614 ms
64 bytes from 10.10.10.1: icmp_seq=1 ttl=64 time=1.716 ms
64 bytes from 10.10.10.1: icmp_seq=2 ttl=64 time=1.658 ms
--- 10.10.10.1 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 1.614/1.663/1.716/0.042 ms

Which strips out all of the quotes and newlines and present in console like fashion to the user, but on a webpage instead.

Mike Desjardins · Accepted Answer · 2015-12-01 20:18:53Z

1

Something like this maybe?

def ping_host(host)
  f = IO.Popen("ping -c 3 #{host}")
  @output = f.readlines
  return "<pre>#{@output.join}</pre>".html_safe
end

answered Dec 1, 2015 at 20:18

Mike Desjardins

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1 Comment

Godzilla74 Over a year ago

Snazzy! As I'm good at doing... I was making it too complicated!

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