Let's say I want to scrape the "Weight" attribute from the following content on a website:
<div>
<h2>Details</h2>
<ul>
<li><b>Height:</b>6 ft</li>
<li><b>Weight:</b>6 kg</li>
<li><b>Age:</b>6</li>
</ul>
</div>
All I want is "6 kg". But it's not labeled, and neither is anything around it. But I know that I always want the text after "Weight:". Is there a way of selecting an element based on the text near it or in it?
In pseudocode, this is what it might look like:
require 'selenium-webdriver'
require 'nokogiri'
doc = parsed document
div_of_interest = doc.div where text of h2 == "Details"
element_of_interest = <li> element in div_of_interest with content that contains the string "Weight:"
selected_text = (content in element) minus ("<b>Weight:</b>")
Is this possible?
You can write the following code
p driver.find_elements(xpath: "//li").detect{|li| li.text.include?'Weight'}.text[/:(.*)/,1]
output
"6 kg"
My suggestion is to use WATIR which is wrapper around Ruby Selenium Binding where you can easily write the following code
p b.li(text: /Weight/).text[/:(.*)/,1]
Yes.
require 'nokogiri'
Nokogiri::HTML.parse(File.read(path_to_file))
.css("div > ul > li")
.children # get the 'li' items
.each_slice(2) # pair a 'b' item and the text following it
.find{|b, text| b.text == "Weight:"}
.last # extract the text element
.text
will return
"6 kg"
You can locate the element through pure xpath: use the contains() function which returns Boolean is its second argument found in the first, and pass to it text() (which returns the text of the node) and the target string.
xpath_locator = '/div/ul/li[contains(text(), "Weight:")]'
value = driver.find_element(:xpath, xpath_locator).text.partition('Weight:').last
Then just get the value after "Weight:".
Related
Watir
mytext =browser.element(:xpath => '//*[#id="gold"]/div[1]/h1').text
Html
<h1>
This is the text I want
<span> I do not want this text </span>
</h1>
When I run my Watir code, it selects all the text, including what is in the spans. How do I just get the text "This is the text I want", and no span text?
If you have a more complicated HTML, I find it can be easier to deal with this using Nokogiri as it provides more methods for parsing the HTML:
require 'nokogiri'
h1 = browser.element(:xpath => '//*[#id="gold"]/div[1]/h1')
doc = Nokogiri::HTML.fragment(h1.html)
mytext = doc.at('h1').children.select(&:text?).map(&:text).join.strip
Ideally start by trying to avoid using XPath. One of the most powerful features of Watir is the ability to create complicated locators without XPath syntax.
The issue is that calling text on a node gets all content within that node. You'd need to do something like:
top_level = browser.element(id: 'gold')
h1_text = top_level.h1.text
span_text = top_level.h1.span.text
desired_text = h1_text.chomp(span_text)
This is useful for top level text.
If there is only one h1, you can ommit id
#b.h1.text.remove(#b.h1.children.collect(&:text).join(' '))
Or specify it if there are more
#b.h1(id: 'gold').text.remove(#b.h1.children.collect(&:text).join(' '))
Make it a method and call it from your script with get_top_text(#b.h1) to get it
def get_top_text(el)
el.text.chomp(#b.h1.children.collect(&:text).join(' '))
end
In the HTML example below I am trying to grab the $16.95 text in the outer span.price element and exclude the text from the inner span.sale one.
<div class="price">
<span class="sale">
<span class="sale-text">"Low price!"</span>
"$16.95"
</span>
</div>
If I was using Nokogiri this wouldn't be too difficult.
price = doc.css('sale')
price.search('.sale-text').remove
price.text
However Capybara navigates rather than removes nodes. I knew something like price.text would grab text from all sub elements, so I tried to use xpath to be more specific. p.find(:xpath, "//span[#class='sale']", :match => :first).text. However this grabs text from the inner element as well.
Finally, I tried looping through all spans to see if I could separate the results but I get an Ambiguous error.
p.find(:css, 'span').each { |result| puts result.text }
Capybara::Ambiguous: Ambiguous match, found 2 elements matching css "span"
I am using Capybara/Selenium as this is for a web scraping project with authentication complications.
There is no single statement way to do this with Capybara since the DOMs concept of innerText doesn't really support what you want to do. Assuming p is the '.price' element, two ways you could get what you want are as follows:
Since you know the node you want to ignore just subtract that text from the whole text
p.find('span.sale').text.sub(p.find('span.sale-text').text, '')
Grab the innerHTML string and parse that with Nokogiri or Capybara.string (which just wraps Nokogiri elements in the Capybara DSL)
doc = Capybara.string(p['innerHTML'])
nokogiri_fragment = doc.native
#do whatever you want with the nokogiri fragment
I am trying to use Selenium. The problem is the following:
The doc structure:
<div class="jsSkills oSkills">
<a class="oTag oTagSmall oSkill" href="/contractors/skill/software-testing/" data-contractor="749244">software-testing</a>
<a class="oTag oTagSmall oSkill" href="/contractors/skill/software-qa-testing/" data-contractor="749244">software-qa-testing</a>
<a class="oTag oTagSmall oSkill" href="/contractors/skill/blog-writing/" data-contractor="749244">blog-writing</a>
</div>
I need to obtain all a's text to be in array like:
{"software-testing", "software-qa-testing", "blog-writing"}
I tried this:
contrSkill = driver.find_element(:xpath, "//div[contains(#class, 'jsSkills')]").text
puts contrSkill
but got this:
"software-testingsoftware-qa-testingblog-writing"
Please explain how to appropriately make an array.
You should get all of the link elements you want (using find_elements). Then you can iterate over each link and collect its text into an array (Ruby has a collect method that helps with this).
# Get all of the link elements within the div
skill_links = driver.find_elements(:xpath, "//div[contains(#class, 'jsSkills')]/a")
# Create an array of the text of each link
skill_text_array = skill_links.collect(&:text)
p skill_text_array
#=> ["software-testing", "software-qa-testing", "blog-writing"]
I'm working on a vim rspec plugin (https://github.com/skwp/vim-rspec) - and I am parsing some html from rspec. It looks like this:
doc = %{
<dl>
<dt id="example_group_1">This is the heading text</dt>
Some puts output here
</dl>
}
I can get the entire inner of the using:
(Hpricot.parse(doc)/:dl).first.inner_html
I can get just the dt by using
(Hpricot.parse(doc)/:dl).first/:dt
But how can I access the "Some puts output here" area? If I use inner_html, there is way too much other junk to parse through. I've looked through hpricot docs but don't see an easy way to get essentially the inner text of an html element, disregarding its html children.
I ended up figuring out a route by myself, by manually parsing the children:
(#context/"dl").each do |dl|
dl.children.each do |child|
if child.is_a?(Hpricot::Elem) && child.name == 'dd'
# do stuff with the element
elsif child.is_a?(Hpricot::Text)
text=child.to_s.strip
puts text unless text.empty?
end
end
Note that this is bad HTML you have there. If you have control over it, you should wrap the content you want in a <dd>.
In XML terms what you are looking for is the TextNode following the <dt> element. In my comment I showed how you can select this node using XPath in Nokogiri.
However, if you must use Hpricot, and cannot select text nodes using it, then you could hack this by getting the inner_html and then stripping out the unwanted:
(Hpricot.parse(doc)/:dl).first.inner_html.sub %r{<dt>.+?</dt>}, ''
doc = Nokogiri::HTML(open(url)).xpath("//*")
.xpath("//*[br]/text()[string-length(normalize-space()) != 0]")
.wrap("<span></span>")
puts doc
it just returns the text ... i was expecting the full html source with now wrapped around the specified xpath elements.
Try
doc = Nokogiri::HTML(open(url)).xpath("//*")
.xpath("//*[br and text()[string-length(normalize-space()) != 0]]")
.wrap("<span></span>")
puts doc
What your XPath does is it fetches the non-empty text nodes. Which by their very definition don't contain any markup.
In contrast, my XPath fetches any node that contains at least one <br> and at least one non-empty text node.