KeywordFilteringService

• A PHP Service that you can use to filter keywords. It depons on a php extension named Swoole.

• 以RPC方式提供关键词过滤服务，这个服务依赖php swoole扩展。

• swoole扩展让PHP有了直接提供HTTP服务的能力，使得庞大的字典可以常驻内存，避免原生php每次访问都需要重新载入字典所耗费的时间（随着字典条目的增加这个时间会越来越长）。

  时间主要耗费在将字符串反序列化成数组上,这是由于php数组在内核的实现机制

• 这里使用HTTP方式的原因主要是考虑到通用性，可以参考swoole官方的example修改成socket接口来实现同样的功能。

• 具体的过滤实现代码则是从phpwind中提取出来

Requirements

• php swoole extension
• swooleFramework
• phpwind filter class
• PHP 5.3.10 at least

Usage

• step 1 install swoole extension

    pecl install swoole
    vim /etc/php.ini 
    #add extension=swoole.so  

• step 2 dowload KeywordFilteringServie

git clone [email protected]:wosiwo/KeywordFilteringService.git

• step 3 create binary dict

  this step will read original dict from /server/dict_all.txt ,then convert Plaintext into ASCII code and use it to build array with a struct which is conducive to search

cd KeywordFilteringService/dict
php createBinaryDict.php

• step 4 start the httpserver

php server.php start

• step 5 now you can call it by service client

  php tests/keyword_service.php

  if the page show a [["wosiwo","0.8"]] , it shows that the service is running successfully.

##Tip:

To increase the transmission limit ,You may need to change your kernel parameters of your computer. In FreeBSD/MacOS:

sysctl -w net.local.dgram.maxdgram=8192
sysctl -w net.local.dgram.recvspace=200000 修改Unix Socket的buffer区尺寸

other to see http://wiki.swoole.com/wiki/page/11.html