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剛剛寫程式寫到一半忽然想到這個破壞力極大的標籤
雖然這個標籤不會造成多大的危害，但是在某些網站上，還是可以造成一定程度的破壞
所以請各位Web Developers注意，過濾掉這個標籤：<plaintext>
另外，HTML的註解標籤也請過濾，也就是：<!--
這兩個都可以破壞版面！
結果請看這邊：
http://willh.org/cfc/cfc_priv/plaintext.htm
解決方式：
如果是使用黑名單來擋HTML標籤，請把plaintext給加入
如果沒有使用檔標籤的套件，請盡快使用
如果沒有辦法使用檔標籤的套件，請透過Regular Expression幹掉它！
上個例子，我們用PHP + Ruby 搭配ActiveRecord的方式來寫資料新增的程式
今天我們就來延伸應用一下，要做什麼呢？ RSS聯撥器！
有鑒於GoogleReader的RSS聯撥器產生出來的東西太醜(只能修改一兩個小地方.. 我總覺得那好胖= =)，乾脆自己寫個來用
Demo網址改天再PO上來，我們先來寫程式比較重要:P
主機請記得先裝好Ruby、PHP、Apache跟MySQL；OS要啥都沒差，我比較建議LAMP的配置XD
我們來建立一個叫做feeds的目錄包含一個子目錄，叫做lib：
mkdir -p feeds/lib
cd feeds/lib
touch connect.rb model.rb require.rb
- connect.rb
資料庫連線初始化
- model.rb
資料表模型宣告
- rqeuire.rb
會用到的額外library引入
- connect.rb
#!/usr/bin/env ruby;require 'lib/require';ActiveRecord::Base.establish_connection({:adapter => "mysql",:host => "localhost",:username => "username",:password => "password",:database => "others"})
- model.rb
#!/usr/bin/env ruby;require 'lib/connect';class Feed < ActiveRecord::Base;end
- require.rb
#!/usr/bin/env ruby;%w|rubygems active_record hpricot open-uri|.each{|lib| require lib}
mysql> create database others;
mysql> use others;
mysql> create table feeds(id int, uri varchar(255));
mysql> describe feeds;
touch index.php list.rb new.htm new_record.rb save.php
- index.php
網站首頁，會列出目前的RSS feed
- save.php
儲存RSS feed網址
- list.rb
處理RSS feed
- new_record.rb
將RSS feed網址存入資料庫(也可以直接用php寫.. 我是沒有意見)
- new.htm
新增RSS feed網址的表單
- index.php
<html>
<head>
<title></title>
</head>
<body>
<a href="new.htm">Create</a>
<ul>
<?php
exec("ruby list.rb", $args);
for($i=0;$i<count($args);$i+=3)
echo "<li><a href=\"" . $args[$i+1] . "\" title=\"作者：" . $args[$i+2] . "\">" . $args[$i] . "</a> -- " . $args[$i+2] . "</li>";
?>
</ul>
</body>
</html>
- save.php
<?php
exec("ruby new_record.rb " . $_POST["feed_uri"], $arg);
if ($arg) echo "<script>location.href=\"index.php\";</script>";
?>
- list.rb
#!/usr/bin/env ruby
=begin
Filename: list.rb
=end
require 'lib/model'
Feed.find(:all).each{|feed|
doc = Hpricot(open(feed.uri))
rss = doc.search("entry")
max = rss.size > 3 ? 3 : rss.size
max.times {|i|
break if rss.nil?
puts rss[i].search("title").text.gsub(/\n/, " ") # Return the title of the article to the PHP file.
puts rss[i].search("link[@rel='alternate']")[0]["href"].gsub(/\n/, " ") # Return the link of the article to the PHP file.
puts rss[i].search("author/name").text.gsub(/\n/, " ") # Return the author of the article to the PHP file.
}
}
- new_record.rb
#!/usr/bin/env ruby
=begin
Filename: new_record.rb
=end
require 'lib/model';puts Feed.new({:uri => ARGV[0]}).save
- new.htm
<html>
<head>
<title></title>
</head>
<body>
<form action="save.php" method="post">
<p>Please input the feed url:<input type="text" name="feed_uri" /></p>
<p><input type="submit" value="Save!" /></p>
</form>
</body>
</html>
標籤：
activerecord,
php,
ruby
0
回應
如果老闆要求使用php，可是您卻是Ruby狂熱者，這.. 怎辦呢？
沒關係！ 一樣用Ruby寫，php只要做一點點的處理就好！
How to? php中有這個函式：exec
( 本範例實作於Windows XP Professional搭配InstantRails；在其他作業系統上沒有測試過，不過各位還是可以嘗試看看 )
我們來試試看吧！
先寫個test.rb：
#!/usr/bin/env ruby
#
# Filename: test.rb
#
puts "Hello"
puts "world"
<?php
exec("test.rb", $args);
foreach($arg as $args)
echo $arg . "<br />";
?>
#!/usr/bin/env ruby
#
# Filename: ar.rb
#
require 'rubygems'
gem 'activerecord'
ActiveRecord::Base.establish_connection(
:adapter => 'mysql',
:host => 'localhost',
:username => 'root',
:password => '',
:database => 'cal'
)
class Event < ActiveRecord::Base;end
name, descr = ARGV[0], ARGV[1]
puts Event.new({:name => name, :descr => descr, :date => Date.today, :time => Time.now}).save
<!-- Filename: ar_form.html -->
<html>
<head>
<title>PHP with Ruby and ActiveRecord</title>
</head>
<body>
<form action="ar_save.php" method="POST">
Username: <input type="text" name="usrname" /><br />
Description: <textarea name="descr"></textarea><br />
<input type="submit" value="Save it!" />
</form>
</body>
</html>
<?php
// Filename: ar_save.php
exec("2.rb " . $_POST["usrname"] . " " . $_POST["descr"], $arg);
if($arg[0]) echo "Success!";
?>
# Filename: ar_read.rb
require 'rubygems'
gem 'activerecord'
ActiveRecord::Base.establish_connection(
:adapter => "mysql",
:host => "localhost",
:username => "root",
:password => "",
:database => "cal"
)
class Event < ActiveRecord::Base;end
events = Event.find(:all, :conditions => "name = '#{ARGV[0]}'")
events.each{ |event|
puts event.name
puts event.descr
puts event.date.to_s(:db)
puts event.time.strftime("%H:%M:%S")
}
<?php
// Filename: ar_read.php
exec("ar_read.rb " . $_GET["name"], $args);
$info = array();
for($i=0, $j=0;$i<count($args);$i+=4, $j++){
$info[$j]["name"] = $args[$i];
$info[$j]["descr"] = $args[$i+1];
$info[$j]["date"] = $args[$i+2];
$info[$j]["time"] = $args[$i+3];
}
for($j=0;$j<count($info);$j++)
echo "Name => " . $info[$j]["name"] . "<br />Description => " . $info[$j]["descr"] . "<br />Date => " . $info[$j]["date"] . "<br />Time => " . $info[$j]["time"] . "<br />";
?>
puts 1, 2, 3
puts 1
puts 2
puts 3
puts 1; puts 2; puts 3
標籤：
activerecord,
php,
ruby
0
回應
感謝在Ruby-talk上的：
Chris Carter:)
David A. Black
Harry
Robert Dober
James Edward
class Array這個程式是由Harry所寫出的，底下轉貼原文：
def longest
# Harry <http://www.kakueki.com/ruby/list.html>
self.select{|r| r.to_s.size == self.max{|x, y| x.to_s.size <=> y.to_s.size}.to_s.size}
end
end
On 4/29/07, Billy Hsu <ruby.maillist@gmail.com> wrote:> Thanks for your reply, I learned more on this thread :P
> But I have a question:
> If I have an array contain:
> ary = [1, 12, 234, "456"]
> there has two elements which size is 3, but the longest method just returned
> one of them.
> I can't solve it :(
>Is this what you are looking for?
Do you want all longest elements?
big = [1, 12, 234,45,978, "456"].max {|x,y| x.to_s.size <=> y.to_s.size}
p [1, 12, 234,45,978, "456"].select {|r| r.to_s.size == big.to_s.size}
http://www.kakueki.com/ruby再一次謝謝Harry的幫助:)/list.html
A Look into Japanese Ruby List in English
class Array
def which_long?
# Version 1.0
# Coded by CFC <>
# PLEASE DO NOT REMOVE THE COMMENT OF THIS FUNCTION, THANKS A LOT.
# Usage:
# ['a', 'ab', 'abc' 1234].which_long?
# => 1234
self.size.times{|i| self[i]=self[i].to_s}
max, long = 0, String.new
self.each{|item| item.size > max ? (max = item.size; long = item) : next}
long
end
end
以上是原始碼，使用方式如下：
puts ['a', 'ab', 'abc', 1234].which_long?
=> 1234
授權還沒定，不過大家還是可以拿去使用:P
請不要拿掉註解.. 謝謝
ERROR: While executing gem ... (NoMethodError)這個時候該怎麼辦呢？
undefined method `refresh' for #<Hash:0xb799a478>
rm -f /usr/local/lib/ruby/gems/1.8/source_cache經過測試後.. 真的就正常了..
先說好，跟往常一樣.. 到我Pixnet的網誌看會比較不頭痛:P
版本1可以不用寫群組名稱，但是程式碼好醜ˊˋ
版本2必須要有群組名稱，適用於學校(?)
版本1下載
版本2下載
版本1：
#!/usr/bin/env ruby
File.open(ARGV[0]) do |file|
while a = file.gets
a = a.chomp.split(/ /)
print "username => #{a[0]} ", "password => #{a[1]} ", "group => #{a[2]}", "\n"
a[2].nil? ? `useradd -m #{a[0]}` : `useradd -m -G #{a[2]} #{a[0]}`
`echo #{a[0]}:#{a[1]} | chpasswd`
end
end
exec "pwconv"
使用者清單寫法：
帳號 密碼 群組
版本2：
#!/usr/bin/env ruby
require 'yaml'
YAML.load_file(ARGV[0]).each{ |grp|
grp.each{ |usr|
usr.each{ |i|
info = i.chomp.split(/ /)
`useradd -m -G #{grp[0]} #{info[0]}`
`echo #{info[0]}:#{info[1]} | chpasswd`
}
}
}
`pwconv`
使用者清單寫法：
grp1:使用方式都是：
- usr1 pwd1
- usr2 pwd2
grp2:
- usr3 pwd3
- usr4 pwd4
grp3:
- usr5 pwd5
- usr6 pwd6
