I need to post data on a website through a program.
To achieve this I am using Mechanize Nokogiri and Selenium.
Here's my code :
def aeiexport
# first Mechanize is submitting the form to identify yourself on the website
agent = Mechanize.new
agent.get("https://www.glou.com")
form_login_AEI = agent.page.forms.first
form_login_AEI.util_vlogin = "42"
form_login_AEI.util_vpassword = "666"
# this is suppose to submit the form I think
page_compet_list = agent.submit(form_login_AEI, form_login_AEI.buttons.first)
#to be able to scrap the page you end up on after submitting form
body = page_compet_list.body
html_body = Nokogiri::HTML(body)
#tds give back an array of td
tds = html_body.css('.L1').xpath("//table/tbody/tr[position()>1]/td")
# Checking my array of td with some condition
tds.each do |td|
link = td.children.first # Select the first children
if link.html = "2015 32 92 0076 012"
# Only consider the html part of the link, if matched follow the previous link
previous_td = td.previous
previous_url = previous_td.children.first.href
#following the link contained in previous_url
page_selected_compet = agent.get(previous_url)
# to be able to scrap the page I end up on
body = page_selected_compet.body
html_body = Nokogiri::HTML(body)
joueur_access = html_body.search('#tabs0head2 a')
# clicking on the link
joueur_access.click
rechercher_par_numéro_de_licence = html_body.css('.L1').xpath("//table/tbody/tr/td[1]/a[1]")
pure_link_rechercher_par_numéro_de_licence = rechercher_par_numéro_de_licence['href']
#following pure_link_rechercher_par_numéro_de_licence
page_submit_licence = agent.get(pure_link_rechercher_par_numéro_de_licence)
body_submit_licence = page_submit_licence.body
html_body = Nokogiri::HTML(body_submit_licence)
#posting my data in the right field
form.field_with(:name => 'lic_cno[0]') == "9511681"
1) So far what do you think about this code, Do you think there is an error in there
2) This part is the one I am really not sure about : I have posted my data in the right field but now I need to submit it. The problem is that the button I need to click is like this:
<input type="button" class="button" onclick="dispatchAndSubmit(document.JoueurRechercheForm, 'rechercher');" value="Rechercher">
it triggers a javascript function onclick. I am triying Selenium to trigger the click event. Then I end up on another page, where I need to click a few more times.. I tried this:
driver.find_element(:value=> 'Rechercher').click
driver.find_element(:name=> 'sel').click
driver.find_element(:value=> 'Sélectionner').click
driver.find_element(:value=> 'Inscrire').click
But so far I have not succeeded in posting the data.
Could you please tell me if selenium will enable me to do what I need to do. If can I do it ?
At a glance your code can use less indentation and more white space/empty lines to separate the internal logic of AEIexport (which should be changed to aei_export since Ruby uses snake case for method names. You can find more recommendations on how to style ruby code here).
Besides the style of your code, an error I found at the beginning of your method is using an undefined variable page when defining form_login_AEI.
For your second question, I'm not familiar with Selenium; however since it does use a real web browser it can handle JavaScript. Watir is another possible solution.
An alternative would be to view the page source (i.e. in Firebug) and understand what the JavaScript on the page does. Then use Mechanize to follow the link manually.
Related
I am attempting to scrape a website (respectfully). I tried with Nokogiri, then mechanize, then because the website i am scraping is loading a form dynamically, I was forced to use a webdriver. I am currently using ruby's watir.
What i am trying to do, is to fill out the dynamic form with a select, clicking submit, going to the results part of the page (form renders result on same page), and collecting all the divs with the information (traversing through sub-divs looking for hrefs).
def scrape
browser = Watir::Browser.new
browser.goto 'http://www.website-link.com'
browser.select_list(:id => 'city').select('cityName')
browser.link(:id, 'btnSearch').click
# this part; results from search are in this div w/ this ID
# however, iterating through this list does not work the way i expected
browser.div(:id, 'resultsDiv').divs.each do |div|
p div
end
browser.close
end
right now this returns
#<Watir::Div: located: true; {:id=>"resultsDiv", :tag_name=>"div"} --> {:tag_name=>"div", :index=>0}>
#<Watir::Div: located: true; {:id=>"resultsDiv", :tag_name=>"div"} --> {:tag_name=>"div", :index=>1}>
#<Watir::Div: located: true; {:id=>"resultsDiv", :tag_name=>"div"} --> {:tag_name=>"div", :index=>2}>
which looking at the page source looks like there are 3 divs inside of the resultsDiv which is probably what those indexes are. I guess what i was expecting (coming from Nokogiri/Mechanize) is an object to manipulate.
does anyone have any experience doing this that could point me to the right direction?
If you known the order that you want, you can do:
browser.driver.find_elements(:id => 'resultsDiv')[n].click
or
browser.div(:id => 'resultsDiv')[n].click
or
browser.div(:id, 'resultsDiv').div(:id,'id_n').click
Goal: In irb, open a series of hyperlinks in new tabs and save a screenshot of each.
Code:
require "rubygems"
require "selenium-webdriver"
browser = Selenium::WebDriver.for:firefox
browser.get 'https://company.com'
browser.find_element(:name, "username").send_keys("myUsername")
browser.find_element(:name, "password").send_keys("myPassword")
browser.find_element(:name, "ibm-submit").click
body = browser.find_element(:tag_name => 'body')
body.send_keys(:control, 't')
parent = browser.find_element(:xpath, "//div[#id='someid']")
children = parent.find_elements(:xpath,"//a")
children.each do |i| ;
body.send_keys(:control, 't')
i.click
browser.save_screenshot("{i}")
end
Problem:
Selenium::WebDriver::Error::StaleElementReferenceError: Element not found in the cache - perhaps the page has changed since it was looked up
Question: What am I doing wrong?
Basically you can't share WebElements across pages, yet you're trying to access body across multiple tabs. Try not to think of them as self-contained objects, but as proxies to something on a real page.
The solution is to only ever perform actions on the 'current' page. In your case that means sending the Ctrl-T event on the tab that you've created. Having done that the first time, you're switched to the new tab. You then need to re-perform the lookup:
newTabsBody = browser.find_element(:tag_name => 'body')
and then:
newTabsBody.send_keys(:control, 't')
to create the next one. Continue for each child.
I'm working on a web-scraping solution that grabs totally different webpages and lets the user define rules/scripts in order to extract information from the page.
I started scraping from a single domain and build a parser based on Nokogiri.
Basically everything works fine.
I could now add a ruby class each time somebody wants to add a webpage with a different layout/style.
Instead I thought about using an approach where the user specifies elements where content is stored using xpath and storing this as a sort of recipe for this webpage.
Example: The user wants to scrape a table-structure extracting the rows using a hash (column-name => cell-content)
I was thinking about writing a ruby function for extraction of this generic table information once:
# extracts a table's rows as an array of hashes (column_name => cell content)
# html - the html-file as a string
# xpath_table - specifies the html table as xpath which hold the data to be extracted
def basic_table(html, xpath_table)
xpath_headers = "#{xpath_table}/thead/tr/th"
html_doc = Nokogiri::HTML(html)
html_doc = Nokogiri::HTML(html)
row_headers = html_doc.xpath(xpath_headers)
row_headers = row_headers.map do |column|
column.inner_text
end
row_contents = Array.new
table_rows = html_doc.xpath('#{xpath_table}/tbody/tr')
table_rows.each do |table_row|
cells = table_row.xpath('td')
cells = cells.map do |cell|
cell.inner_text
end
row_content_hash = Hash.new
cells.each_with_index do |cell_string, column_index|
row_content_hash[row_headers[column_index]] = cell_string
end
row_contents << [row_content_hash]
end
return row_contents
end
The user could now specify a website-recipe-file like this:
<basic_table xpath='//div[#id="grid"]/table[#id="displayGrid"]'
The function basic_table is referenced here, so that by parsing the website-recipe-file I would know that I can use the function basic_table to extract the content from the table referenced by the xPath.
This way the user can specify simple recipe-scripts and only has to dive into writing actual code if he needs a new way of extracting information.
The code would not change every time a new webpage needs to be parsed.
Whenever the structure of a webpage changes only the recipe-script would need to be changed.
I was thinking that someone might be able to tell me how he would approach this. Rules/rule engines pop into my mind, but I'm not sure if that really is the solution to my problem.
Somehow I have the feeling that I don't want to "invent" my own solution to handle this problem.
Does anybody have a suggestion?
J.
I am attempting to log into a site via Mechanize that is proving to be a bit of a challenge. I can get past the first two form pages, but then after submitting an ID and password, I get a third page prior to being able to go into the main content that I'm attempting to scrape.
In my case I have the following Ruby source that gets me to the point where I'm hitting a roadblock:
agent = Mechanize.new
start_url = 'https://sub.domain.tld/action'
# Get first page
page = agent.get(start_url)
# Fill in the first ID field and submit form
login_form = page.forms.first
id_field = login_form.field_with(:name => "ctl00$PageContent$Login1$IdTextBox")
id_field.value = "XXXXXXXXXXX"
# Get the next password page & submit form:
page = agent.submit(login_form, login_form.buttons.first)
login_form = page.forms.first
password_field = login_form.field_with(:name => "ctl00$PageContent$Login1$PasswordTextBox")
password_field.value = "XXXXXXXXXXX"
# Get the next page and...
page = agent.submit(login_form, login_form.buttons.first)
# Try to go into the main content, just to hit a wall. :s
page = agent.click(page.link_with(:text => /Skip to main/))
The contents of the third page as per the mechanize agent output is:
https://gist.github.com/5ed57292c8f6532352fd
As you may note from this, it seems that one should be able to simply use agent.click on the first link to get on into the main content. Unfortunately, this is simply looping back to this page. Each time this loads I see that it is loading a new page, but it ends up having the precise same contents each time. Something is preventing me from being able to go on in through this multi-factor login to the main content it would seem, but I can't put my finger on what that might be.
Here is the page.content from that third request: http://f.cl.ly/items/252y261c303R0m2P1R0j/source.html
Any thoughts on what may be stopping me from going forward to content here?
I have been trying to write a script that may help me to comment from command line.(The sole reason why I want to do this is its vacation time here and I want to kill time).
I often visit and post on this site.So I am starting with this site only.
For example to comment on this post I used the following script
require "uri"
require 'net/http'
def comment()
response = Net::HTTP.post_form(URI.parse("http://www.geeksforgeeks.org/wp-comments-post.php"),{'author'=>"pikachu",'email'=>"saurabh8c#gmail.com",'url'=>"geekinessthecoolway.blogspot.com",'submit'=>"Have Your Say",'comment_post_ID'=>"18215",'comment_parent'=>"0",'akismet_comment_nonce'=>"70e83407c8",'bb2_screener_'=>"1330701851 117.199.148.101",'comment'=>"How can we generalize this for a n-ary tree?"})
return response.body
end
puts comment()
Obviously the values were not hardcoded but for sake of clearity and maintaining the objective of the post i am hardcoding them.
Beside the regular fields that appear on the form,the values for the hidden fields i found out from wireshark when i posted a comment the normal way.I can't figure out what I am missing?May be some js event?
Edit:
As few people suggested using mechanize I switched to python.Now my updated code looks like:
import sys
import mechanize
uri = "http://www.geeksforgeeks.org/"
request = mechanize.Request(mechanize.urljoin(uri, "archives/18215"))
response = mechanize.urlopen(request)
forms = mechanize.ParseResponse(response, backwards_compat=False)
response.close()
form=forms[0]
print form
control = form.find_control("comment")
#control=form.find_control("bb2_screener")
print control.disabled
# ...or readonly
print control.readonly
# readonly and disabled attributes can be assigned to
#control.disabled = False
form.set_all_readonly(False)
form["author"]="Bulbasaur"
form["email"]="ashKetchup#gmail.com"
form["url"]="9gag.com"
form["comment"]="Y u no put a captcha?"
form["submit"]="Have Your Say"
form["comment_post_ID"]="18215"
form["comment_parent"]="0"
form["akismet_comment_nonce"]="d48e588090"
#form["bb2_screener_"]="1330787192 117.199.144.174"
request2 = form.click()
print request2
try:
response2 = mechanize.urlopen(request2)
except mechanize.HTTPError, response2:
pass
# headers
for name, value in response2.info().items():
if name != "date":
print "%s: %s" % (name.title(), value)
print response2.read() # body
response2.close()
Now the server returns me this.On going through the html code of the original page i found out there is one more field bb2_screener that i need to fill if I want to pretend like a browser to the server.But the problem is the field is not written inside the tag so mechanize won't treat it as a field.
Assuming you have all the params correct, you're still missing the session information that the site stores in a cookie. Consider using something like mechanize, that'll deal with the cookies for you. It's also more natural in that you tell it which fields to fill in with which data. If that still doesn't work, you can always use a jackhammer like selenium, but then technically you're using a browser.