How to match content between HTML specific tags with attribute using grep?

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Which regular expression should I use with the command grep if I wanted to match the text contained within the tag <div class="Message"> and its closing tag </div> in an HTML file?

Here's one way using GNU grep:

grep -oP '(?<=<div class="Message"> ).*?(?= </div>)' file

If your tags span multiple lines, try:

< file tr -d '\n' | grep -oP '(?<=<div class="Message"> ).*?(?= </div>)'

Text between two tags, should I use with the command grep if I wanted to match the text contained within the tag <div class="Message"> and its closing tag </div> in an HTML file? A message from our CEO about the future of Stack Overflow and Stack Exchange. Read now.

You can't do it reliably with just grep. You need to parse the HTML with an HTML parser.

What if the HTML code has something like:

<!--
<div class="Message">blah blah</div>
-->

You'll get a false hit on that commented-out code. Here are some other examples where a regex-only option will fail you.

Consider using xmlgrep from the XML::Grep Perl module, as discussed here: Extract Title of a html file using grep

Get selected tag from html file, Now I don't have any specific html requirements that would warrant for an html parser. Perl's HTML::TreeBuilder, Python's BeautifulSoup and others are easy to use, easier { |e| e.content } picks out the content for each element, i.e. what is between <tr> and </tr> . curl -sL https://www.iana.org/ | xargs | grep -Po "<tr>\K(. If I was using it to actually parse an HTML doc (which I have some code that does), I keep track of indices and everytime I match a tag, I record the beginning and end index. Then I compare that with the previous matched tag indices and I grab the content between.

You can do that by specifying a regex:

grep -E "^<div class=\"Message\">.*</div>$" input_files

Not that this will only print the enclosures found on the same line. If your tag spans multiple lines, you can try:

tr '\n' ' ' < input_file | grep -E "^<div class=\"Message\">.*</div>$"

[PDF] Regular Expressions: The Complete Tutorial, Which regular expression should I use with the command grep if I wanted to match the text contained within the tag <div class="Message"> and its closing tag � Tag and attribute are two concepts related to HTML. The main difference between tag and attribute is that a tag is a way of representing an HTML element in the program, while an attribute is a way of describing the characteristics of an HTML element. Reference: 1.HTML Elements, w3schools.com. Available here. 2.HTML Attributes, w3schools.com.

Grep between html tags, Which regular expression should I use with the command grep if I wanted to match the text contained within the tag. That said, here’s a PHP function that can extract any HTML tags and their attributes from a given string : /** * extract_tags() * Extract specific HTML tags and their attributes from a string. * * You can either specify one tag, an array of tag names, or a regular expression that matches the tag name(s).

Hack 53 Transform XML Documents with grep and sed :: Chapter 3 , You can use grep for that and its only-matching parameter ( -o ), e.g.: To include only <script> tags, try (change index.html with your file): For getting just the file names (from src attribute), you can extend by adding another grep , e.g.: just src attributes of script elements that have src attributes – Maciej Krawczyk Oct 11� It is possible to style HTML elements that have specific attributes or attribute values. CSS [attribute] Selector The [attribute] selector is used to select elements with a specified attribute.

GNU Grep 3.4, Basically, a regular expression is a pattern describing a certain amount of text. In this book, regular expressions are printed between guillemots: �regex�. When using a regular expression or grep tool like PowerGREP or the Suppose you want to use a regex to match an HTML tag. attributes or a closing tag. HTML tags. Tags are used to mark up the start and end of an HTML element. ex : <p> HTML attributes. An attribute defines a property for an element, consists of an attribute/value pair, and appears within the element’s start tag.

Comments
  • One has to assume that the tags can span multiple lines.
  • What does the "?<=" mean in front of <div class?
  • @InquilineKea: It's (part of) a positive lookbehind assertion.
  • tr -d '\r\n' for windows line breaks
  • Hi guys, I' was unable to make this code work. Can you see why here: stackoverflow.com/questions/46866839/…
  • +1 Thats a good idea. I didn't consider commented code, but I'm not convinced the OP has either.
  • thanks for the answers. My tags span multiple lines, when I run your command I obtain this error: tr: extra operand test.txt' Try tr --help' for more information.
  • @Albz: Try, tr '\n' ' ' < test.txt