Created
November 22, 2008 17:50
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require 'rubygems' | |
require 'open-uri' | |
require 'hpricot' | |
require 'mysql' | |
require 'sequel' | |
require 'timeout' | |
class Scraper | |
SITEMAP = "http://www.gstatic.com/s2/sitemaps/profiles-sitemap.xml" | |
SITEMAPFILE = "sitemap_merged.txt" | |
DB = Sequel.connect("mysql://root:root@localhost/google-profiles") | |
DATASET = DB[:people] | |
def initialize | |
puts "Init Scraper" | |
if File.exists?(SITEMAPFILE) && File.size(SITEMAPFILE) >= 0 | |
puts "Already have sitemapfile" | |
self.get_profile_pages | |
else | |
puts "Updating main sitemap" | |
self.update_sitemap | |
end | |
end | |
def update_sitemap | |
@sitemapfile = File.new("sitemap.txt","w") | |
@sitemap = get_document_or_404(SITEMAP) | |
if not @sitemap.nil? | |
@sitemapfile << @sitemap | |
puts "Main sitemap saved" | |
end | |
end | |
def get_subsitemaps | |
@subsitemap = Array.new | |
(@sitemap/:sitemap).each do |subsitemap| | |
@subsitemap << (subsitemap/:loc).inner_html | |
end | |
puts "Subsitemap links retrieved" | |
end | |
def process_subsitemaps | |
@sitemap_merged = Array.new | |
@subsitemap.each do |subsitemap| | |
puts "Retrieving subsitemap: " + subsitemap | |
map = get_document_or_404(subsitemap).to_s | |
if not map.nil? | |
@sitemap_merged << map | |
end | |
end | |
@sitemapfile_merged = File.new(SITEMAPFILE,"w") | |
@sitemapfile_merged << @sitemap_merged | |
puts "Merged sitemap saved" | |
end | |
def get_profile_pages | |
@sitemaps = File.new(SITEMAPFILE,"r") | |
@sitemaps.each do |profile_page| | |
@page = get_document_or_404(profile_page) | |
if not @page.nil? | |
self.process_profile(@page,profile_page) | |
end | |
end | |
end | |
def process_profile(page,url) | |
@profile = { | |
:name => (page/"div.name_header").inner_html, | |
:url => url, | |
:position => (page/"span.title").inner_html, | |
:school => (page/"span.school").inner_html, | |
:organization => (page/"span.org").inner_html, | |
:address => (page/"span.adr").inner_html, | |
:reader_url => "", | |
:feed_url => "", | |
} | |
self.process_shared_page | |
self.save_or_update_profile(@profile) | |
end | |
def process_shared_page | |
shared_page_link = @page.at("a[@href*='reader/shared']") | |
if not shared_page_link.nil? | |
shared_page_link = shared_page_link[:href] | |
shared_page = get_document_or_404(shared_page_link) | |
if not shared_page.nil? | |
@profile[:reader_url] = shared_page_link | |
if not shared_page.at("#shared-empty-message").nil? | |
feed_url = shared_page.at("a[@href*='reader/public']")[:href] | |
@profile[:feed_url] = feed_url | |
end | |
end | |
end | |
end | |
def get_document_or_404(url) | |
begin | |
timeout(10) do | |
return Hpricot(open(url.to_s)) | |
end | |
rescue Timeout::Error | |
puts "Request timed out, skipping" | |
return nil | |
rescue | |
puts "Document not found (404): " + url.to_s | |
return nil | |
end | |
end | |
def save_or_update_profile(profile) | |
begin | |
DATASET << profile | |
puts "New profile saved" | |
rescue Sequel::DatabaseError | |
puts "Profile exists, skipping" | |
end | |
end | |
end | |
scraper = Scraper.new |
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