Write a cmd line script to parse an xml file

Question

What would be the best solution to check (from the command line with a script), if a certain xml file contains this line:

<endpoint uri="endpoint.php" class="flex.messaging.endpoints.AMFEndpoint"/>

or this line

<!-- <endpoint uri="endpoint.php" class="flex.messaging.endpoints.AMFEndpoint"/> -->

and stop execution if the second one (commented out) is found?

Thx, martin

Noufal Ibrahim · Accepted Answer · 2010-01-21 10:58:01Z

4

Single line or across multiple lines? If the former, you can use grep.

Update: There seem to be some XML aware variants like xgrep, xmltwig and xmlstarlet.

answered Jan 21, 2010 at 10:58

Noufal Ibrahim

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Comments

ghostdog74 · Accepted Answer · 2010-01-21 12:05:45Z

0

assuming pattern occurs at single line

#!/bin/bash
awk '
/<endpoint uri=.*endpoint.php.*class.*flex.messaging.endpoints.AMFEndpoint/ && /<!--/{
    exit
}
/<endpoint uri=.*endpoint.php.*class.*flex.messaging.endpoints.AMFEndpoint/{
    # to execute external script inside awk, uncomment below
    #cmd = "myscript.sh"
    #system(cmd)
} 
' file

OR you can return a code back to shell

#!/bin/bash
var=$(awk '
/<endpoint uri=.*endpoint.php.*class.*flex.messaging.endpoints.AMFEndpoint/ && /<!--/{
    print 1
}
/<endpoint uri=.*endpoint.php.*class.*flex.messaging.endpoints.AMFEndpoint/{
    print 0
} 
' file)
[ "$var" -eq 1 ] && exit
[ "$var" -eq 0 ] && ./myscript.sh

edited Jan 21, 2010 at 12:05

answered Jan 21, 2010 at 11:03

ghostdog74

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3 Comments

Noufal Ibrahim Over a year ago

These are not totally reliable. A node called <endpoints (note the extra s) would mess things up.

ghostdog74 Over a year ago

its OP's sample, not mine. If there is possibility of "s" in endpoint, then matching it exactly will do.

martin Over a year ago

this looks good! It is sufficient how it is checked. I am trying to execute a script in the second case... just putting a command in there does not work for me e.g. (./doSomething.sh) do I need to use exec()?

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