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Use charlock_holmes instead of nkf at FetchLinkCardService (#4080)

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* Specs for language detection

* Use CharlockHolmes instead of NKF

* Correct mistakes

* Correct style

* Set hint_enc instead of falling back and strip_tags

* Improve specs

* Add dependencies
This commit is contained in:
nullkal 2017-07-09 05:44:31 +09:00 committed by Eugen Rochko
parent 794781d121
commit 007ab330e6
11 changed files with 78 additions and 4 deletions
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1
.travis.yml
View file

@ -32,6 +32,7 @@ addons:
- g++-6
- libprotobuf-dev
- protobuf-compiler
- libicu-dev
rvm:
- 2.3.4

1
Aptfile
View file

@ -3,3 +3,4 @@ libprotobuf-dev
ffmpeg
libxdamage1
libxfixes3
libicu-dev

1
Dockerfile
View file

@ -25,6 +25,7 @@ RUN echo "@edge https://nl.alpinelinux.org/alpine/edge/main" >> /etc/apk/reposit
ffmpeg \
file \
git \
icu-dev \
imagemagick@edge \
libpq \
libxml2 \

1
Gemfile
View file

@ -22,6 +22,7 @@ gem 'active_model_serializers', '~> 0.10'
gem 'addressable', '~> 2.5'
gem 'bootsnap'
gem 'browser'
gem 'charlock_holmes', '~> 0.7.3'
gem 'cld3', '~> 3.1'
gem 'devise', '~> 4.2'
gem 'devise-two-factor', '~> 3.0'

2
Gemfile.lock
View file

@ -106,6 +106,7 @@ GEM
rack (>= 1.0.0)
rack-test (>= 0.5.4)
xpath (~> 2.0)
charlock_holmes (0.7.3)
case_transform (0.2)
activesupport
chunky_png (1.3.8)
@ -501,6 +502,7 @@ DEPENDENCIES
capistrano-rbenv (~> 2.1)
capistrano-yarn (~> 2.0)
capybara (~> 2.14)
charlock_holmes (~> 0.7.3)
cld3 (~> 3.1)
climate_control (~> 0.2)
devise (~> 4.2)

1
Vagrantfile vendored
View file

@ -37,6 +37,7 @@ sudo apt-get install \
yarn \
libprotobuf-dev \
libreadline-dev \
libicu-dev \
-y
# Install rvm

8
app/services/fetch_link_card_service.rb
View file

@ -1,5 +1,4 @@
# frozen_string_literal: true
require 'nkf'
class FetchLinkCardService < BaseService
include HttpHelper
@ -86,7 +85,12 @@ class FetchLinkCardService < BaseService
return if response.code != 200 || response.mime_type != 'text/html'
html = response.to_s
page = Nokogiri::HTML(html, nil, NKF.guess(html).to_s)
detector = CharlockHolmes::EncodingDetector.new
detector.strip_tags = true
guess = detector.detect(html, response.charset)
page = Nokogiri::HTML(html, nil, guess&.fetch(:encoding))
card.type = :link
card.title = meta_property(page, 'og:title') || page.at_xpath('//title')&.content

20
spec/fixtures/requests/koi8-r.txt vendored Normal file
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@ -0,0 +1,20 @@
HTTP/1.1 200 OK
Server: nginx/1.11.10
Date: Tue, 04 Jul 2017 16:43:39 GMT
Content-Type: text/html
Content-Length: 273
Connection: keep-alive
Last-Modified: Tue, 04 Jul 2017 16:41:34 GMT
Accept-Ranges: bytes
<HTML>
<HEAD>
<META NAME="GENERATOR" CONTENT="Adobe PageMill 3.0J Mac">
<META HTTP-EQUIV="Content-Type" CONTENT="text/html;CHARSET=koi8-r">
<TITLE>íÏÓËÏ×Ñ ÎÁÞÉÎÁÅÔß ÔÏÌØËÏ ×ß XVI ÓÔ. ÐÒÉ×ÌÅËÁÔØ ×ÎÉÍÁÎÅ ÉÎÏÓÔÒÁÎÃÅ×ß.</TITLE>
</HEAD>
<BODY>
<P><CENTER><B><FONT SIZE="+2">íÏÓËÏ×Ñ ÎÁÞÉÎÁÅÔß ÔÏÌØËÏ ×ß XVI ÓÔ. ÐÒÉ×ÌÅËÁÔØ ×ÎÉÍÁÎÅ ÉÎÏÓÔÒÁÎÃÅ×ß.</FONT></B><BR>
<HR><BR>
</BODY>
</HTML>

4
spec/fixtures/requests/sjis.txt vendored
View file

@ -11,10 +11,10 @@ Accept-Ranges: bytes
<HEAD>
<META NAME="GENERATOR" CONTENT="Adobe PageMill 3.0J Mac">
<META HTTP-EQUIV="Content-Type" CONTENT="text/html;CHARSET=x-sjis">
<TITLE>JSISのページ</TITLE>
<TITLE>SJISのページ</TITLE>
</HEAD>
<BODY>
<P><CENTER><B><FONT SIZE="+2">SJISのページ</FONT></B><BR>
<P><CENTER><B><FONT SIZE="+2">私も同年ましていわゆる記念人ってものの時でしありです。もし時間に意味者は正しくどんな発会ませだまでが申し上げがいらっしゃるたには参考帰るたいだから、少しにもやっあっましなた。金からいうないのはどうも九月をできるだけたたくた。けっして岡田さんに反抗幸少し徴に云おでしょ金力こうした権力あなたか指図がというお出入りなくだろなありて、その昔は私か金力陰を怒らから、久原さんのものをがたのいつがしかるにご希望と向いばそれmanにご矛盾へ参りように同時にご演説がしでならので、多分もし表裏に変ったてくれです事で考えたた。しかも例えばごがたがとどまらものも実際むやみとありですて、この自分では申しんてとして世間に並べのに行かなかっな。</FONT></B><BR>
<HR><BR>
</BODY>
</HTML>

20
spec/fixtures/requests/sjis_with_wrong_charset.txt vendored Normal file
View file

@ -0,0 +1,20 @@
HTTP/1.1 200 OK
Server: nginx/1.11.10
Date: Tue, 04 Jul 2017 16:43:39 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 273
Connection: keep-alive
Last-Modified: Tue, 04 Jul 2017 16:41:34 GMT
Accept-Ranges: bytes
<HTML>
<HEAD>
<META NAME="GENERATOR" CONTENT="Adobe PageMill 3.0J Mac">
<META HTTP-EQUIV="Content-Type" CONTENT="text/html;CHARSET=x-sjis">
<TITLE>SJISのページ</TITLE>
</HEAD>
<BODY>
<P><CENTER><B><FONT SIZE="+2">私も同年ましていわゆる記念人ってものの時でしありです。もし時間に意味者は正しくどんな発会ませだまでが申し上げがいらっしゃるたには参考帰るたいだから、少しにもやっあっましなた。金からいうないのはどうも九月をできるだけたたくた。けっして岡田さんに反抗幸少し徴に云おでしょ金力こうした権力あなたか指図がというお出入りなくだろなありて、その昔は私か金力陰を怒らから、久原さんのものをがたのいつがしかるにご希望と向いばそれmanにご矛盾へ参りように同時にご演説がしでならので、多分もし表裏に変ったてくれです事で考えたた。しかも例えばごがたがとどまらものも実際むやみとありですて、この自分では申しんてとして世間に並べのに行かなかっな。</FONT></B><BR>
<HR><BR>
</BODY>
</HTML>

23
spec/services/fetch_link_card_service_spec.rb
View file

@ -8,6 +8,10 @@ RSpec.describe FetchLinkCardService do
stub_request(:get, 'http://example.xn--fiqs8s/').to_return(request_fixture('idn.txt'))
stub_request(:head, 'http://example.com/sjis').to_return(status: 200, headers: { 'Content-Type' => 'text/html' })
stub_request(:get, 'http://example.com/sjis').to_return(request_fixture('sjis.txt'))
stub_request(:head, 'http://example.com/sjis_with_wrong_charset').to_return(status: 200, headers: { 'Content-Type' => 'text/html' })
stub_request(:get, 'http://example.com/sjis_with_wrong_charset').to_return(request_fixture('sjis_with_wrong_charset.txt'))
stub_request(:head, 'http://example.com/koi8-r').to_return(status: 200, headers: { 'Content-Type' => 'text/html' })
stub_request(:get, 'http://example.com/koi8-r').to_return(request_fixture('koi8-r.txt'))
stub_request(:head, 'https://github.com/qbi/WannaCry').to_return(status: 404)
subject.call(status)
@ -27,6 +31,25 @@ RSpec.describe FetchLinkCardService do
it 'works with SJIS' do
expect(a_request(:get, 'http://example.com/sjis')).to have_been_made.at_least_once
expect(status.preview_card.title).to eq("SJISのページ")
end
end
context do
let(:status) { Fabricate(:status, text: 'Check out http://example.com/sjis_with_wrong_charset') }
it 'works with SJIS even with wrong charset header' do
expect(a_request(:get, 'http://example.com/sjis_with_wrong_charset')).to have_been_made.at_least_once
expect(status.preview_card.title).to eq("SJISのページ")
end
end
context do
let(:status) { Fabricate(:status, text: 'Check out http://example.com/koi8-r') }
it 'works with koi8-r' do
expect(a_request(:get, 'http://example.com/koi8-r')).to have_been_made.at_least_once
expect(status.preview_card.title).to eq("Московя начинаетъ только въ XVI ст. привлекать внимане иностранцевъ.")
end
end
end