芳草苑

Day: December 15, 2008

  • Clear Magento cache is essential after layout xml update

    说来懊恼，为了让Magento product list能够显示自定义属性的值，我查看了magento wiki 和 forum 上几十个帖子，众说纷纭，我也不知道哪个是对的，或者哪个针对当前1.1.8可用。一个个实验下来，排列组合了不下100种可能，比如：

    • 有人说layout add this line: my_attribute，另有人说是my_attribute
    • 有人说要用$_product->getMyAttribute()，也有人说用$_product->getAttribute(‘my_attribute’)，也有人说用$_product->getData(‘my_attribute’)，也有人说用$_product->getAdditionalData(‘my_attribute’)，还有人说用$_product->getResource()->getAttribute(‘my_attribute’)->getFrontend()->getValue($_product))
    • 还有人说Create separate module for your customization, Name it ‘Mycustomization’
      (can be changed).
      Then do this:
      1. Create file app/etc/modules/Mycustomization.xml

      <?xml version="1.0"?>
<config>
<modules>
<Mycustomization>
<active>
true
</active>
<codePool>
local
</codePool>
</Mycustomization>
</modules>
</config>

      2. Create folder app/code/local/Mycustomization and inside it app/code/local/Mycustomization/etc/

      3. Create file
      app/code/local/Mycustomization/etc/config.xml

      <?xml version="1.0"?>
<config>
<modules>
<Mycustomization>
<version>
0.0.1
</version>
</Mycustomization>
</modules>
<frontend>
<product>
<collection>
<attributes>
<designer/>
</attributes>
</collection>
</product>
</frontend>
</config>

      Once done on the frontend in all product collections you will have designer attribute loaded automatically.

    • 还有Create a file app/etc/modules/category_product_attributes.xml with the following: 
      <?xml version="1.0"?>
<config>
<frontend>
<product>
<collection>
<attributes>
<attributeyouwant/>//This is your attribute
</attributes>
</collection>
</product>
</frontend>
</config>
    • 等等

    最后发现所有组合都不起作用，除非清除magento cache 让 layout xml 生效。

  • Email encoder for not being spidered

    我用Email encoder很久了。以前总是去别人网站上运算一下，拿来就用。如今觉得加密算法很多，我应该筛选一下，并作一个适合我自己的常用的工具。

    因为跟javascript 字符串加解密有关，我首先找到一段程序，试运行了一下，相当不错，据说还支持中文字符串加密以及中文密码。

    function Encrypt(str, pwd) {
if(str=="")return "";
str = escape(str);
if(!pwd || pwd==""){ var pwd="1234"; }
pwd = escape(pwd);
if(pwd == null || pwd.length <= 0) {
alert("Please enter a password with which to encrypt the message.");
return null;
}
var prand = "";
for(var i=0; i<pwd.length; i++) {
prand += pwd.charCodeAt(i).toString();
}
var sPos = Math.floor(prand.length / 5);
var mult = parseInt(prand.charAt(sPos) + prand.charAt(sPos*2) + prand.charAt(sPos*3) + prand.charAt(sPos*4) + prand.charAt(sPos*5));
var incr = Math.ceil(pwd.length / 2);
var modu = Math.pow(2, 31) - 1;
if(mult < 2) {
alert("Algorithm cannot find a suitable hash. Please choose a different password. \nPossible considerations are to choose a more complex or longer password.");
return null;
}
var salt = Math.round(Math.random() * 1000000000) % 100000000;
prand += salt;
while(prand.length > 10) {
prand = (parseInt(prand.substring(0, 10)) + parseInt(prand.substring(10, prand.length))).toString();
}
prand = (mult * prand + incr) % modu;
var enc_chr = "";
var enc_str = "";
for(var i=0; i<str.length; i++) {
enc_chr = parseInt(str.charCodeAt(i) ^ Math.floor((prand / modu) * 255));
if(enc_chr < 16) {
enc_str += "0" + enc_chr.toString(16);
}else
enc_str += enc_chr.toString(16);
prand = (mult * prand + incr) % modu;
}
salt = salt.toString(16);
while(salt.length < 8)salt = "0" + salt;
enc_str += salt;
return enc_str;
}

function Decrypt(str, pwd) {
if(str=="")return "";
if(!pwd || pwd==""){ var pwd="1234"; }
pwd = escape(pwd);
if(str == null || str.length < 8) {
alert("A salt value could not be extracted from the encrypted message because it's length is too short. The message cannot be decrypted.");
return;
}
if(pwd == null || pwd.length <= 0) { 
alert("Please enter a password with which to decrypt the message.");
return;
}
var prand = "";
for(var i=0; i<pwd.length; i++) {
prand += pwd.charCodeAt(i).toString();
}
var sPos = Math.floor(prand.length / 5);
var mult = parseInt(prand.charAt(sPos) + prand.charAt(sPos*2) + prand.charAt(sPos*3) + prand.charAt(sPos*4) + prand.charAt(sPos*5));
var incr = Math.round(pwd.length / 2);
var modu = Math.pow(2, 31) - 1;
var salt = parseInt(str.substring(str.length - 8, str.length), 16);
str = str.substring(0, str.length - 8);
prand += salt;
while(prand.length > 10) {
prand = (parseInt(prand.substring(0, 10)) + parseInt(prand.substring(10, prand.length))).toString();
}
prand = (mult * prand + incr) % modu;
var enc_chr = "";
var enc_str = "";
for(var i=0; i<str.length; i+=2) {
enc_chr = parseInt(parseInt(str.substring(i, i+2), 16) ^ Math.floor((prand / modu) * 255));
enc_str += String.fromCharCode(enc_chr);
prand = (mult * prand + incr) % modu;
}
return unescape(enc_str);
}

    转念一想，我把问题搞复杂了，对自己没什么好处。我的Email encoder用得着这么复杂吗？毕竟我想保护的又不是名人的Email address。所以我改用我自己的方式——采用双重url encode，在第二重url encoding时，encode全部字符（含字母和数字）。