How can I get the mail address from HTML code with Nokogiri? I'm thinking in regex but I don't know if it's the best solution.
Example code:
<html>
<title>Example</title>
<body>
This is an example text.
<a href="mailto:[email protected]">Mail to me</a>
</body>
</html>
Does a method exist in Nokogiri to get the mail address if it is not between some tags?
You can extract the email addresses using xpath.
The selector //a will select any a tags on the page, and you can specify the href attribute using @ syntax, so //a/@href will give you the hrefs of all a tags on the page.
If there are a mix of possible a tags on the page with different urls types (e.g. http:// urls) you can use xpath functions to further narrow down the selected nodes. The selector
//a[starts-with(@href, \"mailto:\")]/@href
will give you the href nodes of all a tags that have a href attribute that starts with "mailto:".
Putting this all together, and adding a little extra code to strip out the "mailto:" from the start of the attribute value:
require 'nokogiri'
selector = "//a[starts-with(@href, \"mailto:\")]/@href"
doc = Nokogiri::HTML.parse File.read 'my_file.html'
nodes = doc.xpath selector
addresses = nodes.collect {|n| n.value[7..-1]}
puts addresses
With a test file that looks like this:
<html>
<title>Example</title>
<body>
This is an example text.
<a href="mailto:[email protected]">Mail to me</a>
<a href="http://example.com">A Web link</a>
<a>An empty anchor.</a>
</body>
</html>
this code outputs the desired [email protected]. addresses is an array of all the email addresses in mailto links in the document.
I'll preface this by saying that I know nothing about Nokogiri. But I just went to their website and looked at the documentation and it looks pretty cool.
If you add an email_field class (or whatever you want to call it) to your email link, you can modify their example code to do what you are looking for.
require 'nokogiri'
require 'open-uri'
# Get a Nokogiri::HTML:Document for the page we’re interested in...
doc = Nokogiri::HTML(open('http://www.yoursite.com/your_page.html'))
# Do funky things with it using Nokogiri::XML::Node methods...
####
# Search for nodes by css
doc.css('.email_field').each do |email|
# assuming you have than one, do something with all your email fields here
end
If I were you, I would just look at their documentation and experiment with some of their examples.
Here's the site: http://nokogiri.org/
CSS selectors can now (finally) find text at the beginning of a parameter:
require 'nokogiri'
doc = Nokogiri::HTML(<<EOT)
<a href="http:example.com">blah</a>
<a href="mailto:[email protected]">blah</a>
EOT
doc.at('a[href^="mailto:"]')
.to_html # => "<a href=\"mailto:[email protected]\">blah</a>"
Nokogiri tries to track the jQuery extensions. I used to have a link to a change-notice or message from one of the maintainers talking about it but my mileage has varied.
See "CSS Attribute Selectors" for more information.
Try to get the whole html page and use regular expressions.
