Say you want to extract some string between two patterns. GREP's Perl
integration does a nice job to perform such match.
For example, the string given is,
<pre><code class="lang-html">&lt;toplevel&gt;&lt;suggestion data="hello kitty"/&gt;&lt;/toplevel&gt;
</code></pre>
And you want to extract between toplevel tags. The following GREP command do
it nicely.
<pre><code class="lang-bash">grep -P -o '(?&lt;=(&lt;tag&gt;)).*(?=(&lt;/tag&gt;))'
</code></pre>
The whole script is
<pre><code class="lang-bash">#!/bin/bash

# STRING = &lt;toplevel&gt;&lt;suggestion data="hello kitty"/&gt;&lt;/toplevel&gt;
# OUTPUT = &lt;suggestion data="hello kitty"/&gt;

RESPONSE_STR='&lt;toplevel&gt;&lt;suggestion data="hello kitty"/&gt;&lt;/toplevel&gt;'

echo "$RESPONSE_STR" | grep -P -o '(?&lt;=(&lt;toplevel&gt;)).*(?=(&lt;/toplevel&gt;))'
</code></pre>

Say you want to extract some string between two patterns. GREP's Perl
integration does a nice job to perform such match.

For example, the string given is,

```html
<toplevel><suggestion data="hello kitty"/></toplevel>
```

And you want to extract between toplevel tags. The following GREP command do
it nicely.

```bash
grep -P -o '(?<=(<tag>)).*(?=(</tag>))'
```

The whole script is

```bash
#!/bin/bash

# STRING = <toplevel><suggestion data="hello kitty"/></toplevel>
# OUTPUT = <suggestion data="hello kitty"/>

RESPONSE_STR='<toplevel><suggestion data="hello kitty"/></toplevel>'

echo "$RESPONSE_STR" | grep -P -o '(?<=(<toplevel>)).*(?=(</toplevel>))'
```

Minhaz's Blog

Minhaz's Blog

Cut string between two XML nodes using GREP