I'm trying to insert the html generated from phantom js into a mechanize object so that I can easily search it. I've tried the following to no avail...
b = Watir::Browser.new :phantomjs
url = "www.google.com"
b.goto url
agent = Mechanize.new
#Following is not executed at same time...
#Error 1: lots of errors
page = agent.get(b.html)
#Error 2: `parse': wrong number of arguments (1 for 3) (ArgumentError)
page = agent.parse(b.html)
#Error 3 last ditch effort: undefined method `agent'
page = agent(b.html)
As I think it through I'm beginning to wonder if I can mechanize an existing html object... I initially got onto it via: http://shane.in/2014/01/headless-web-scraping/ & http://watirmelon.com/2013/02/05/watir-webdriver-with-ghostdriver-on-osx-headless-browser-testing/
I was in the same situation. I write a lot of code with Mechanize so that I do not want to move to nokogiri when using watir. Below code is how I did.
require 'watir'
require 'mechanize'
b = Watir::Browser.new
b.goto(url)
html = b.html
a = Mechanize.new
page = Mechanize::Page.new(nil, {'content-type'=>'text/html'}, html, nil, a)
You could use page to search for elements.
require 'watir'
require 'nokogiri'
b = Watir::Browser.new :phantomjs
url = "http://google.com"
b.goto url
p Nokogiri::HTML(b.html)
You are probably better off just using Nokogiri for this [that is, if you only need to search for some data in source].
Related
I'm using mechanize to fill out a form, but I want to review it on the webpage before submission. The goal is to open a browser with the pre-filled form.
require 'mechanize'
mechanize = Mechanize.new
page = mechanize.get('https://www.linuxtoday.com/contribute.html')
form = page.form_with :name => 'upload'
form.sub_name = "mbb"
form.email = "mbb#mbb.com"
form.author_name = "Mr Potatohead"
form.title = "Mr Potatohead writes Ruby"
form.link = "https://potato.potato"
form.body = "More text"
`open #{page.uri}`
Calling out to the operating system to open the site is, of course, empty form. I don't see a page.open or similar method available. Is there a way to achieve this (using mechanize or other gems)?
That won't work because setting form fields doesn't even update the DOM.
If you want to review the form data you can inspect form.request_data
As others have mentioned in the comments try selenium, you'll need chrome or firefox driver installed, here's example with chrome to get you started:
require 'selenium-webdriver'
require 'pry' # optional
driver = Selenium::WebDriver.for :chrome
driver.navigate.to 'https://www.linuxtoday.com/contribute.html'
form = driver.find_element(id: 'upload')
form.find_element(id: 'sub_name').send_keys 'mbb'
form.find_element(id: 'email').send_keys 'mbb#mbb.com'
binding.pry # or sleep 60
driver.quit
For more instructions see documentation
I want to get taobao's list of URL of products on search result page without taobao API.
I tried following Ruby script.
require "open-uri"
require "rubygems"
require "nokogiri"
url='https://world.taobao.com/search/search.htm?_ksTS=1517338530524_300&spm=a21bp.7806943.20151106.1&search_type=0&_input_charset=utf-8&navigator=all&json=on&q=%E6%99%BA%E8%83%BD%E6%89%8B%E8%A1%A8&cna=htqfEgp0pnwCATyQWEDB%2FRCE&callback=__jsonp_cb&abtest=_AB-LR517-LR854-LR895-PR517-PR854-PR895'
charset = nil
html = open(url) do |f|
charset = f.charset
f.read
end
doc = Nokogiri::HTML.parse(html, nil, charset)
p doc.xpath('//*[#id="list-itemList"]/div/div/ul/li[1]/div/div[1]/div/a/#href').each{|i| puts i.text}
# => 0
I want to get list of URL like https://click.simba.taobao.com/cc_im?p=%D6%C7%C4%DC%CA%D6%B1%ED&s=328917633&k=525&e=lDs3%2BStGrhmNjUyxd8vQgTvfT37ERKUkJtUYVk0Fu%2FVZc0vyfhbmm9J7EYm6FR5sh%2BLS%2FyzVVWDh7%2FfsE6tfNMMXhI%2B0UDC%2FWUl0TVvvELm1aVClOoSyIIt8ABsLj0Cfp5je%2FwbwaEz8tmCoZFXvwyPz%2F%2ByQnqo1aHsxssXTFVCsSHkx4WMF4kAJ56h9nOp2im5c3WXYS4sLWfJKNVUNrw%2BpEPOoEyjgc%2Fum8LOuDJdaryOqOtghPVQXDFcIJ70E1c5A%2F3bFCO7mlhhsIlyS%2F6JgcI%2BCdFFR%2BwwAwPq4J5149i5fG90xFC36H%2B6u9EBPvn2ws%2F3%2BHHXRqztKxB9a0FyA0nyd%2BlQX%2FeDu0eNS7syyliXsttpfoRv3qrkLwaIIuERgjVDODL9nFyPftrSrn0UKrE5HoJxUtEjsZNeQxqovgnMsw6Jeaosp7zbesM2QBfpp6NMvKM5e5s1buUV%2F1AkICwRxH7wrUN4%2BFn%2FJ0%2FIDJa4fQd4KNO7J5gQRFseQ9Z1SEPDHzgw%3D however I am getting 0
What should I do?
I don't know taobao.com but the page seems like its running lots of javascript. So perhaps the content can actually not be retrieved with a client without javascript capabilities. So instead of open-uri, you could try the gem selenium-webdriver:
https://rubygems.org/gems/selenium-webdriver/versions/2.53.4
I am parsing prada.com and would like to scrape data in the div class "nextItem" and get its name and price. Here is my code:
require 'rubygems'
require 'mechanize'
require 'nokogiri'
require 'open-uri'
agent = Mechanize.new
page = agent.get('http://www.prada.com/en/US/e-store/department/woman/handbags.html?cmp=from_home')
fp = File.new('prada_prices','w')
html_doc = Nokogiri::HTML(page)
page = html_doc.xpath("//ol[#class='nextItem']")
page.each do {|i| fp.write(i.text + "\n")}
end
I get an error and no output. What I think I am doing is instantiating a mechanize object and calling it agent.
Then creating a page variable and assigning it the url provided.
Then creating a variable that is a nokogiri object with the mechanize url passed in
Then searching the url for all class references that are titled nextItem
Then printing all the data contained there
Can someone show me where I might have went wrong?
Since Prada's website dynamically loads its content via JavaScript, it will be hard to scrape its content. See "Scraping dynamic content in a website" for more information.
Generally speaking, with Mechanize, after you get a page:
page = agent.get(page_url)
you can easily search items with CSS selectors and scrape for data:
next_items = page.search(".fooClass")
next_items.each do |item|
price = item.search(".fooPrice").text
end
Then simply handle the strings or generate hashes as you desire.
Here are the wrong parts:
Check again the block syntax - use {} or do/end but not both in the same time.
Mechanize#get returns a Mechanize::Page which act as a Nokogiri document, at least it has search, xpath, css. Use them instead of trying to coerce the document to a Nokogiri::HTML object.
There is no need to require 'open-uri', and require 'nokogiri' when you are not using them directly.
Finally check maybe more about Ruby's basics before continuing with web scraping.
Here is the code with fixes:
require 'rubygems'
require 'mechanize'
agent = Mechanize.new
page = agent.get('http://www.prada.com/en/US/e-store/department/woman/handbags.html?cmp=from_home')
fp = File.new('prada_prices','w')
page = page.search("//ol[#class='nextItem']").each do |i|
fp.write(i.text + "\n")
end
fp.close
I'm trying to get a website's headline (in Vietnamese) using Nokogiri:
# encoding: utf-8
require 'rubygems'
require 'nokogiri'
require 'open-uri'
page = Nokogiri::HTML(open("http://vnexpress.net"))
list = page.css("a[class='link-topnews']")
puts list[0].text
but it's giving the error:
undefined method `text' for nil:NilClass (NoMethodError)
The weird thing is, with the exact same code, sometimes it does work and gives the correct result:
Triều Tiên dọa hành động với máy bay B-52 của Mỹ
Even when trying to get the title it's giving the same error:
page = Nokogiri::HTML(open("http://vnexpress.net/"))
list = page.css("title")
puts list[0].text
Why does it behave like that? What did I do wrong?
It seems that the their server refuses to serve content when you use just nokogiri. I suppose, they are checking some headers. You can add headers or use Mechanize gem:
require 'mechanize'
agent = Mechanize.new
page = agent.get "http://vnexpress.net"
page.search("a.link-topnews").first.text
=> "Triều Tiên dọa hành động với máy bay B-52 của Mỹ"
I am trying to follow a link with Mechanize but it does not seem to be working, syntax appears to be correct, am I referencing this incorrectly or do I need to do something else?
Problem area
agent.page.links_with(:text => 'VG278H')[2].click
Full Code
require 'rubygems'
require 'mechanize'
require 'open-uri'
agent = Mechanize.new
agent.get ("http://icecat.biz/en/")
#Show all form fields belonging to the first form
form = agent.page.forms[0].fields
#Enter VG278H into the text box lookup_text, submit the data
agent.page.forms[0]["lookup_text"] = "VG278H"
agent.page.forms[0].submit #Results of this is stored in Mechanize agent.page object
#Call agent.page with our results and assign them to a variable page
page = agent.page
agent.page.links_with(:text => 'VG278H')[2].click
doc = page.parser
puts doc
You should grab a copy of Charles (http://www.charlesproxy.com/) or something that allows you to watch what happens when you submit the form from your browser. Anyway, your problem is that this part:
agent.page.forms[0]["lookup_text"] = "VG278H"
agent.page.forms[0].submit
is returning an html fragment that looks like this:
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><script>self.location.href="http://icecat.us/index.cgi?language=en&new_search=1&lookup_text=VG278H"</script>
So you actually need to call this directly or scrap out the the self.location.href and have your agent perform a get:
page = agent.get("http://icecat.us/index.cgi?language=en&new_search=1&lookup_text=VG278H")
If you were going to do that, this works:
require 'rubygems'
require 'mechanize'
require 'open-uri'
agent = Mechanize.new
agent.get ("http://icecat.biz/en/")
page = agent.get("http://icecat.us/index.cgi?language=en&new_search=1&lookup_text=VG278H")
page = page.links_with(:text => 'VG278H')[2].click
doc = page.parser
puts doc
Happy scraping