My First HelloWorld Module for Apache~
#include <httpd.h>
#include <http_protocol.h>
#include <http_config.h>
static int helloworld_handler( request_rec *r )
{
//Routine check
if( !r->handler || ( strcmp( r->handler, "helloworld" ) != 0 ) ) {
return DECLINED;
}
//Check the "HTTP GET" method
if( r->method_number != M_GET ) {
return HTTP_METHOD_NOT_ALLOWED;
}
ap_set_content_type( r, "text/html;charset=ascii" );
ap_rputs( "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01//EN\">\n", r );
ap_rputs( "<html><head><title>Apache Helloworld "
"Module</title></head>", r );
ap_rputs( "<body><h1>Hello World!</h1>", r );
ap_rputs( "<p>This is the Apache HelloWorld module!</p>", r );
ap_rputs( "</body></html>", r );
return OK;
}
static void helloworld_hooks( apr_pool_t *pool )
{
ap_hook_handler( helloworld_handler, NULL, NULL, APR_HOOK_MIDDLE );
}
module AP_MODULE_DECLARE_DATA helloworld_module = {
STANDARD20_MODULE_STUFF,
NULL,
NULL,
NULL,
NULL,
NULL,
helloworld_hooks
};
保存为mod_helloworld.c后上传到装有Apache的Linux服务器上。
按书中编译方法编译,发现不行:
[logs@dw208066 opt]$ apxs -c mod_helloworld.c
-bash: apxs: command not found
[logs@dw208066 opt]$ find -name apxs
想想就是apxs所在目录并没有列入到系统path中的原因,于是就改用绝对路径:
[logs@dw208066 opt]$ ./local/apache/bin/apxs -c mod_helloworld.c
/usr/lib64/apr-1/build/libtool --silent --mode=compile gcc -prefer-pic -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -pthread -I/opt/local/apache/include -I/usr/include/apr-1 -I/usr/include/apr-1 -c -o mod_helloworld.lo mod_helloworld.c && touch mod_helloworld.slo
mod_helloworld.c: In function 'helloworld_hooks':
mod_helloworld.c:29: error: 'APR_hook_MIDDLE' undeclared (first use in this function)
mod_helloworld.c:29: error: (Each undeclared identifier is reported only once
mod_helloworld.c:29: error: for each function it appears in.)
apxs:Error: Command failed with rc=65536
出现编译错误,提示APR_hook_MIDDLE未定义(我博文里的代码已经改过来了,不存在这个错误),然后去Google了一番,发现只能Google到APR_HOOK_MIDDLE,看样子是书里的排版错误,hook没有大写
遂用vi改了下代码(改后就是我上面贴的那份),然后同样的方法编译:
[logs@dw208066 opt]$ ./local/apache/bin/apxs -c mod_helloworld.c
/usr/lib64/apr-1/build/libtool --silent --mode=compile gcc -prefer-pic -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -pthread -I/opt/local/apache/include -I/usr/include/apr-1 -I/usr/include/apr-1 -c -o mod_helloworld.lo mod_helloworld.c && touch mod_helloworld.slo
/usr/lib64/apr-1/build/libtool --silent --mode=link gcc -o mod_helloworld.la -rpath /opt/local/apache/modules -module -avoid-version mod_helloworld.lo
ls后发现目录下的确多了几个文件,其中就有一个mod_helloworld.la的,于是再调用
[logs@dw208066 opt]$ ./local/apache/bin/apxs -i mod_helloworld.la
apache的Module目录下就多了一个mod_helloworld.so
再在httpd.conf中加入这一Module:
LoadModule helloworld_module modules/mod_helloworld.so
<Location /helloworld>
SetHandler helloworld
</Location>
再调用./apachectl restart
在客户机上敲入 http://192.168.208.66:8080/helloworld
//我在服务器上用的8080端口
显示:
Hello World!
This is the Apache HelloWorld module!
成!