使用apache配置tomcat应用整合php论坛-discuz
最近搞一个web应用，主站基于tomcat的java应用，需要整合php论坛discuz
tomcat应用端口是8101, apahce端口是80，网站域名是www.example.com
使用xampp服务器，直接集成apache和php安装discuz。
现在想达到使用www.example.com访问的是tomcat主站，使用www.example.com/bbs访问的是discuz论坛
由于tomcat端口是8101，不能直接通过www.example.com来访问，所以需要使用apache的VirtualHost来实现
配置如下：
<virtualhost> ProxyPass /bbs ! ProxyPass / http://example.com:8101/myweb/ ProxyPassReverse / http://example.com:8101/myweb/ ProxyPassReverseCookiePath / /</virtualhost>
解释
ProxyPass / http://example.com:8101/myweb/
ProxyPassReverse / http://example.com:8101/myweb/
ProxyPassReverseCookiePath / /
Cookie路径，必须配置，否则网站session将丢失，cookie无法保存，此处配置表示根节点cookie路径为/（也可以配置为其他如:)
ProxyPassReverseCookiePath / /myweb
ProxyPass /bbs !
设置完以可按照预期正常访问。但是有一个问题就是，通过http://www.example.com 和 http://example.com会话不能保持一致，也就是说我使用example.com登录后，再使用
www.example.com访问，登录会话会丢失。
查看cookie路径发现，保持会话的cookie域不一样，一个是www.example.com，一个是example.com。通过查资料，说要想保持一致，必须将cookie域设置为
.example.com,注意域名前面必须有一个点，不要加www和http。
但是通过apache的配置项ProxyPassReverseCookieDomain来设置对本案例无效，因为主站的cookie是tomcat来设置的，使用apache的配置无效。所以必须
修改tomcat配置，修改conf/context.xml
<context sessioncookiepath="/" sessioncookiedomain=".example.com"></context>
这样，通过http://www.example.com 和 http://example.com来访问就能保持会话一致了
此文是个人通过查资料以及实践的心得，有些地方说的不对（或有更好的方案）敬请指出。
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