转自： http://www.54chen.com/index.php?p=309
lighttpd插件开发步骤
插件架构说明
- lighttpd的状态：为了便于理解lighttpd插件开发，需要了解lighttpd server在处理请求响应消息的过程中的11种状态，在这些状态中有如下重要函数需要被调用。对于这些状态，有的请求可能都会涉及到，有些请求可能只会经过部分状态。
| 状态 | 含义 | 对应函数 |
| connect | waiting for a connection | nothing |
| reqstart | init the read-idle timer | nothing |
| read | read http-request-header from network | connection_handle_read_state() connection_handle_read() |
| reqend | parse request | http_request_parse() |
| readpost | read http-request-content from network | connection_handle_read_state() connection_handle_read() |
| handlereq | handle the request internally (might result in sub-requests) | http_response_prepare() |
| respstart | prepare response header | connection_handle_write_prepare() |
| write | write response-header + content to network | connection_handle_write() |
| respend | cleanup environment, log request | plugins_call_handle_request_done() plugins_call_handle_connection_close() connection_close() (if not keep-alive) connection_reset() |
| error | reset connection (incl. close()) | plugins_call_handle_request_done() plugins_call_handle_connection_close() connection_reset() |
| close | close connection (handle lingering close) | connection_close() |
- lighttpd的回调函数：lighttpd在不同的状态中共有16个回调函数.
- Serverwide hooks
init_ called when the plugin is loaded cleanup_ called when the plugin is unloaded set_defaults_ called when the configuration has to be processed handle_trigger_ called once a second handle_sighup_ called when the server received a SIGHUP
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- Connectionwide hooks
Most of these hooks are called in ``http_response_prepare()`` after some fields in the connection structure are set. handle_uri_raw_ called after uri.path_raw, uri.authority and uri.scheme are set handle_uri_clean_ called after uri.path (a clean URI without .. and %20) is set handle_docroot_ called at the end of the logical path handle to get a docroothandle_subrequest_start_ called if the physical path is set up and checked handle_subrequest_ called at the end of ``http_response_prepare()`` handle_physical_path_ called after the physical path is created and no other handler is found for this request handle_request_done_ called when the request is done handle_connection_close_ called if the connection has to be closed handle_joblist_ called after the connection_state_engine is left again and plugin internal handles have to be called connection_reset_ called if the connection structure has to be cleaned up