网络学堂feeds2mail

用网页来看网络学堂的公告很费时间,就打算像 rss2email 那样,把消息制作成邮件。
Rubymechanize 来和网站交互,读取“课程公告”和“课程文件”中的消息,
把链接 sha1 后判断是否生成过提示邮件,没有则跟踪链接,用 w3m 输出成纯文本,
生成的邮件用 sendmail 投递。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
##!/usr/bin/ruby
require 'base64'
require 'date'
require 'digest/sha1'
require 'etc'
require 'mechanize'
require 'set'
agent = Mechanize.new
agent.max_history = 1
conf_dir = File.expand_path('~/.net_lesson')
unless File.directory?(conf_dir) && File.file?(File.join(conf_dir, 'passwd'))
STDERR.puts 'echo [userid] [passwd] > ~/.net_lesson/passwd'
exit 1
end
userid, passwd = File.open(File.join(conf_dir, 'passwd'), 'r') {|f| f.gets.split }
feeds = Set.new
File.open(File.join(conf_dir, 'feeds.dat'), 'r:binary') do |f|
begin
while (h = f.read 20)
feeds.add h
end
rescue EOFError
end
end
new_feeds = []
puts "loaded #{feeds.size} feeds" unless feeds.empty?
page = agent.get('http://learn.tsinghua.edu.cn/')
form = page.form('form1')
form.field_with(:name => 'userid').value = userid
form.field_with(:name => 'userpass').value = passwd
agent.submit(form)
puts 'login'
page = agent.get('http://learn.tsinghua.edu.cn/MultiLanguage/lesson/student/MyCourse.jsp?language=cn')
page.links_with(:href => /course_locate.jsp/).each do |lesson|
lesson_name = lesson.text.gsub(/\s/, '').sub(/\(.*/, '')
page = lesson.click
puts "checking #{lesson_name}"
['getnoteid_student.jsp', 'download.jsp'].collect do |uri|
download = uri == 'download.jsp'
page2 = page.link_with(:href => /#{uri}/).click
page2.links_with(:href => /note_reply|filePath/).each do |note|
h = Digest::SHA1.digest note.href
next if feeds.member? h
puts " found #{note.text.strip}"
author = (download ? 'file ' : '') + note.node.xpath("../following-sibling::td")[-2].text
IO.popen(['/usr/sbin/sendmail', Etc.getlogin], 'w') do |f|
bar = download ? "[#{lesson_name}]" : "*#{lesson_name}*"
time = Date.parse(note.node.xpath("../following-sibling::td")[-1].text).strftime '%a, %d %b %Y 00:00:00 +0800'
f.puts(<<EOF)
From: #{author} <#{Etc.getlogin}>
Subject: =?utf-8?B?#{Base64.strict_encode64("#{bar} #{note.text.strip}")}?=
Date: #{time}
User-Agent: net_lesson
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: binary
EOF
if download
f.puts note.text
else
IO.popen(['w3m', '-dump', '-T', 'text/html'], 'r+') do |p|
p.puts(note.click.body)
p.close_write
f.puts p.read
end
end
f.puts "\nURI: #{page2.uri.merge URI.escape(note.href, /[\u4E00-\u9FFF]/)}"
end
new_feeds << h
end
end
end
unless new_feeds.empty?
puts "appending to feeds.dat"
File.open(File.join(conf_dir, 'feeds.dat'), 'a:binary') {|f| new_feeds.each {|a| f.write(a) } }
end

2014年11月30日更新

这个方案已废弃,现在改用newsbeuter阅读rss了。并使用一个Ruby脚本抓取通知。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
#!/usr/bin/ruby
#encoding: utf-8
require 'open-uri'
require 'nokogiri'
require 'rss'
s = open('http://oars.tsinghua.edu.cn/zzh/30630.nsf/infobytime?openview').read
m = Nokogiri.parse(s).xpath('//script/text()')[0].text.match(/(?<= location\.replace\(")[^"]*(?=")/)
s = open("http://oars.tsinghua.edu.cn#{m[0]}").read
s = s.force_encoding('gbk').encode 'utf-8'
d = Nokogiri.parse(s)
rss = RSS::Maker.make("atom") do |maker|
maker.channel.author = ''
maker.channel.about = ''
maker.channel.updated = Time.now.to_s
maker.channel.title = '教务通知'
d.xpath('//tr[contains(@valign, "top")]').each {|tr|
tds = tr.search('td')
next if tds.size != 4
maker.items.new_item {|item|
#item.link = tds[2].search('a')[1].attr 'href'
item.link = (URI('http://oars.tsinghua.edu.cn') + tds[2].search('a')[1].attr('href')).to_s
item.title = tds[2].text
item.updated = Time.parse tds[3].text
}
}
end
File.write '/tmp/教务通知.rss', rss.to_s
rss = RSS::Maker.make("atom") do |maker|
maker.channel.author = ''
maker.channel.about = ''
maker.channel.updated = Time.now.to_s
maker.channel.title = '重要通知'
t = Time.now
d = Nokogiri::HTML open('http://info.tsinghua.edu.cn/html/view/notice_beforelogin.htm')
d.xpath('//td').each {|td|
next if td.children.size != 2
a = td.search('a')[0]
maker.items.new_item {|item|
item.link = (URI('http://oars.tsinghua.edu.cn') + a.attr('href')).to_s
item.title = a.text
item.updated = t
}
}
end
File.write '/tmp/重要通知.rss', rss.to_s

然后用fcron定期执行上面的脚本,产生/tmp/教务通知.rss/tmp/重要通知.rss

1
2
% fcrontab -l
@ 1h /home/ray/bin/教务通知.rb 2>> /tmp/stderr

~/.config/newsbeuter/urls里添加下面两行:

1
2
file:///tmp/教务通知.rss
file:///tmp/重要通知.rss