Ruby on Rails open URI issue with broken file source - ruby-on-rails

Question

I am having a hell of a problem here.
I'm using ruby on rails:
ruby 1.8.7 (2011-12-10 patchlevel 356)
rails 2.3.14
I'm trying a simple open with open-uri on the following address:
http://jollymag.net/n/10390-летни-секс-пози-във-водата.html (link is NSFW)
However the resulting file when read produces a weird (broken) string.
This was tested on ruby 1.9.3 and rails 3.2.x too.
require 'open-uri'
url = 'http://jollymag.net/n/10390-летни-секс-пози-във-водата.html'
url = URI.encode(url)
file = open(url)
doc = file.collect.to_s # <- the document is broken
document = Nokogiri::HTML.parse(doc,nil,"utf8")
puts document # <- the document after nokogiri has one line of content
I tried Iconv stuff and others but nothing works. The above code is more or less a minimal isolated case for the exact problem.
I appreciate any help since I'm trying to figure this bug for a couple of days now.
Regards,
Yavor

Answer 1

So the problem was a tricky one for me.
It appears that some servers return only gzip-ed response.
So in order to read you of course have to read it accordingly.
I decided to post my whole crawl code so people might find a more complete solutions to such problems. This is part of a bigger class so it refers a lot of the times to self.
Hope it helps!
SHINSO_HEADERS = {
'Accept' => '*/*',
'Accept-Charset' => 'utf-8, windows-1251;q=0.7, *;q=0.6',
'Accept-Encoding' => 'gzip,deflate',
'Accept-Language' => 'bg-BG, bg;q=0.8, en;q=0.7, *;q=0.6',
'Connection' => 'keep-alive',
'From' => 'support#xenium.bg',
'Referer' => 'http://svejo.net/',
'User-Agent' => 'Mozilla/5.0 (compatible; Shinso/1.0;'
}
def crawl(url_address)
self.errors = Array.new
begin
begin
url_address = URI.parse(url_address)
rescue URI::InvalidURIError
url_address = URI.decode(url_address)
url_address = URI.encode(url_address)
url_address = URI.parse(url_address)
end
url_address.normalize!
stream = ""
timeout(10) { stream = url_address.open(SHINSO_HEADERS) }
if stream.size > 0
url_crawled = URI.parse(stream.base_uri.to_s)
else
self.errors << "Server said status 200 OK but document file is zero bytes."
return
end
rescue Exception => exception
self.errors << exception
return
end
# extract information before html parsing
self.url_posted = url_address.to_s
self.url_parsed = url_crawled.to_s
self.url_host = url_crawled.host
self.status = stream.status
self.content_type = stream.content_type
self.content_encoding = stream.content_encoding
self.charset = stream.charset
if stream.content_encoding.include?('gzip')
document = Zlib::GzipReader.new(stream).read
elsif stream.content_encoding.include?('deflate')
document = Zlib::Deflate.new().deflate(stream).read
#elsif stream.content_encoding.include?('x-gzip') or
#elsif stream.content_encoding.include?('compress')
else
document = stream.read
end
self.charset_guess = CharGuess.guess(document)
if not self.charset_guess.blank? or
not self.charset_guess == 'utf-8' or
not self.charset_guess == 'utf8'
document = Iconv.iconv("UTF-8", self.charset_guess , document).to_s
end
document = Nokogiri::HTML.parse(document,nil,"utf8")
document.xpath('//script').remove
document.xpath('//SCRIPT').remove
for item in document.xpath('//*[translate(#src, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", "abcdefghijklmnopqrstuvwxyz")]')
item.set_attribute('src',make_absolute_address(item['src']))
end
document = document.to_s.gsub(/<!--(.|\s)*?-->/,'')
#document = document.to_s.gsub(/\<![ \r\n\t]*(--([^\-]|[\r\n]|-[^\-])*--[ \r\n\t]*)\>/,'')
self.content = Nokogiri::HTML.parse(document,nil,"utf8")
end