[英]Selenium-webdriver for parsing (Ruby)
因此,這是一個使用javascript顯示有關公司的信息的網站 (首先將其翻譯成英文)(您需要單擊“地址和電話號碼”)。 我是用硒完成的(單擊鏈接),現在我正在嘗試使用css選擇器收集有關這些公司(電話,地址等)的信息,並將其保存到數據庫中。 但是我無法正確地將信息保存到數據庫中,因為我無法在所需的變量中保存有關公司的信息。
這是我的代碼(錯了):
require 'rubygems'
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
driver.get 'http://www.ypag.ru/cat/komp249/page0.html'
driver.find_elements(:css, '.p2 div a').each {|link| link.click}
driver.find_elements
(:css, '.p3 a, .firm, .p2 table tr:nth-child(1) .p, .p2 table tr:nth-child(2) .p,
p2 table tr:nth-child(3) .p, .p2 table tr:nth-child(4) .p').each {|n,r,c,k,l,m|
name = n
region = r
field1 = c
field1 k
field1 l
field1 m }
我的目的是將每個CSS選擇器保存在正確的變量中,這可能嗎? 我已經問過這個問題 ,但是后來我沒有用於地址,電話等的CSS選擇器。
如果我應該添加其他信息,請告訴我
第一個findElements返回20個項目,您的代碼塊將單擊每個項目。
但是,您的第二個findElements從您的代碼塊中返回了48個項目,而我不明白您的代碼塊正在試圖實現什么。
'.p3a,.firm,.p2表tr:nth-child(1).p,.p2表tr:nth-child(2).p,p2表tr:nth-child(3).p, .p2表tr:nth-child(4).p'css選擇器返回所有匹配的元素(“,”用作“或”分隔符)。
但是,迭代數組一次僅返回一個元素。 您是否認為每次迭代都可以訪問一家公司的所有字段? 如果是這樣,則不能。
使用此方法將返回20個地址塊。
driver.find_elements
(:css, 'div[id*='adressSelector']')
您可以迭代這些,執行findElement以獲取所需的字段。
該頁面的html不太好-即沒有良好的標識符來關聯數據。 例如,只有相對位置允許您將公司名稱與地址相關聯。
下面的解決方案對文本的放置進行了假設,這雖然很脆弱,但是卻是我能想到的最好的選擇。
require 'rubygems'
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
driver.navigate.to 'http://www.ypag.ru/cat/komp249/page0.html'
# The table that contains all of the data
# This xpath is not ideal (brittle) but I could not find a better identifier)
table = driver.find_element(:xpath, '/html/body/table[4]/tbody/tr/td[2]/table')
# Expand all of the address links
table.find_elements(:css, 'a[href *= loadadress]').each(&:click)
# Get all of the rows that contain data
# Need to ignore blanks, ads, etc.
data_elements = table.find_elements(:xpath, './tbody/tr').keep_if do |row|
row.find_elements(:css, '.p3, .p, .p2').length > 0
end
# Of the rows we have, each set of three rows represents a company
# Iterate through each set of three rows to collect data
data_elements.each_slice(3) do |company|
name = company[0].find_element(:css, '.p3').text
firm = company[0].find_element(:css, '.firm').text
firm_split = firm.split(' » ')
country = firm_split[0]
city = firm_split[1]
description = company[1].text
# Get the address values matching, using the icons to determine the rows meaning
# Note that not every company has each detail, in which case the value will be ''
url = ''
email = ''
phone = ''
address = ''
# Wait to ensure the address block has been loaded
wait = Selenium::WebDriver::Wait.new(:timeout => 10) # seconds
begin
element = wait.until { company[2].find_element(:css, 'div[id*=adressSelector]') }
end
sub_table_data = company[2].find_elements(:css, 'div[id*=adressSelector] tr')
sub_table_data.each do |row|
cells = row.find_elements(:css, 'td')
case cells[0].find_element(:css, 'img').attribute('src')
when /papers/
url = cells[1].text
when /mail/
email = cells[1].text
when /mobile/
phone = cells[1].text
when /map/
address = cells[1].text
end
end
# Output the results (or whatever you want them for)
puts name
puts country
puts city
puts description
puts url
puts email
puts phone
puts address
puts
end
例如,上面的代碼將提供有關第一家公司的以下詳細信息(請注意,這是從翻譯為英語的頁面中獲得的):
Storm-Print
Russia »Moscow
Printing Services: stationery, flyers, leaflets, brochures.
http://www.storm-print.ru
info@storm-print.ru
+7 (495) 101-37-62 multichannel Fax: +7 (495) 101-37-62 multichannel
Russia "Moscow ul.Suschevsky shaft 16, page 4, 127018
供參考,公司的html看起來像:
<tr>
<td align="left" class="p3">
<a href="http://www.msyp.ru/cat/kompaniy992511/s-779665944.html">
<font>
<font class="">
Storm-Print
</font>
</font>
</a>
</td>
<td align="right" class="firm">
<font>
<font>
Russia >
Moscow
</font>
</font>
</td>
</tr>
<tr>
<td align="left" colspan="2" width="100%" class="p">
<font>
<font class="">
Printing Services: stationery, flyers, leaflets, brochures.
</font>
</font>
<br>
</td>
</tr>
<tr>
<td colspan="2" align="right">
<font>
<font>
Rating:
</font>
</font>
<a class="iframe2" href="reit/r.php?id=992511">
<img src="fon/star_reit_off.png" border="0">
<img src="fon/star_reit_off.png" border="0">
<img src="fon/star_reit_off.png" border="0">
<img src="fon/star_reit_off.png" border="0">
<img src="fon/star_reit_off.png" border="0">
</a>
</td>
</tr>
<tr>
<td colspan="2">
<table class="p2" border="0" width="100%" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td align="left">
<div id="adressSelector992511">
<table>
<tbody>
<tr>
<td>
<img src="http://www.ypag.ru/fon/papers.gif" border="0">
</td>
<td class="p">
<a href="http://www.storm-print.ru" target="_blank">
<font>
<font class="">
http://www.storm-print.ru
</font>
</font>
</a>
</td>
</tr>
<tr>
<td>
<img src="http://www.ypag.ru/fon/mail.gif" border="0">
</td>
<td class="p">
<a href="mailto:info@storm-print.ru">
<font>
<font class="">
info@storm-print.ru
</font>
</font>
</a>
</td>
</tr>
<tr>
<td>
<img src="http://www.ypag.ru/fon/mobile.gif" border="0">
</td>
<td class="p">
<font>
<font class="">
+7 (495) 101-37-62 multichannel Fax: +7 (495) 101-37-62 multichannel
</font>
</font>
</td>
</tr>
<tr>
<td>
<img src="http://www.ypag.ru/fon/map.gif" border="0">
</td>
<td class="p">
<font>
<font class="">
Russia "Moscow ul.Suschevsky shaft 16, page 4, 127018
</font>
</font>
</td>
</tr>
<tr>
<td>
<img src="http://ypag.ru/fon/editdelete.png" border="0">
</td>
<td align="left" class="p">
<a href="http://www.ypag.ru/edit_kompany.php?idkomp=992511&c=3770450052" target="_blank" onclick="popupWin = window.open(this.href, 'contacts', 'location,width=600,height=500,top=0,scrollbars=yes'); popupWin.focus(); return false;">
<font>
<font>
Report incorrect data
</font>
</font>
</a>
</td>
</tr>
</tbody>
</table>
</div>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
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