For example, I have a huge HTML file that contains img URL: <http://ex.example.com/hIh39j+ud9wr4/Uusfh.jpeg>

I want to get this URL, assuming it's the *only* url in the entire file.

```
cat file.html | grep -o 'http://ex[a-zA-Z.-]*/[a-zA-Z.-]*/[a-zA-Z.,-]*'

```

This works **only** if the URL doesn't have the plus signs.

How do I make work for + signs as well?