http://www.oschina.net/question/12_45735

下载：   https://github.com/openresty/echo-nginx-module/tags

Nginx 有个 echo 模块可以用来输出一些简单的信息，例如：

location /hello {
  echo "hello, world!";
}
 
location /hello {
  echo -n "hello, "
  echo "world!";
}
 
location /timed_hello {
  echo_reset_timer;
  echo hello world;
  echo "'hello world' takes about $echo_timer_elapsed sec.";
  echo hiya igor;
  echo "'hiya igor' takes about $echo_timer_elapsed sec.";
}
 
location /echo_with_sleep {
  echo hello;
  echo_flush;  # ensure the client can see previous output immediately
  echo_sleep   2.5;  # in sec
  echo world;
}
 
# in the following example, accessing /echo yields
#   hello
#   world
#   blah
#   hiya
#   igor
location /echo {
    echo_before_body hello;
    echo_before_body world;
    proxy_pass $scheme://127.0.0.1:$server_port$request_uri/more;
    echo_after_body hiya;
    echo_after_body igor;
}
location /echo/more {
    echo blah;
}
 
# the output of /main might be
#   hello
#   world
#   took 0.000 sec for total.
# and the whole request would take about 2 sec to complete.
location /main {
    echo_reset_timer;
 
    # subrequests in parallel
    echo_location_async /sub1;
    echo_location_async /sub2;
 
    echo "took $echo_timer_elapsed sec for total.";
}
location /sub1 {
    echo_sleep 2;
    echo hello;
}
location /sub2 {
    echo_sleep 1;
    echo world;
}
 
# the output of /main might be
#   hello
#   world
#   took 3.003 sec for total.
# and the whole request would take about 3 sec to complete.
location /main {
    echo_reset_timer;
 
    # subrequests in series (chained by CPS)
    echo_location /sub1;
    echo_location /sub2;
 
    echo "took $echo_timer_elapsed sec for total.";
}
location /sub1 {
    echo_sleep 2;
    echo hello;
}
location /sub2 {
    echo_sleep 1;
    echo world;
}
 
# Accessing /dup gives
#   ------ END ------
location /dup {
  echo_duplicate 3 "--";
  echo_duplicate 1 " END ";
  echo_duplicate 3 "--";
  echo;
}
 
# /bighello will generate 1000,000,000 hello's.
location /bighello {
  echo_duplicate 1000_000_000 'hello';
}
 
# echo back the client request
location /echoback {
  echo_duplicate 1 $echo_client_request_headers;
  echo "\r";
 
  echo_read_request_body;
 
  echo_request_body;
}
 
# GET /multi will yields
#   querystring: foo=Foo
#   method: POST
#   body: hi
#   content length: 2
#   ///
#   querystring: bar=Bar
#   method: PUT
#   body: hello
#   content length: 5
#   ///
location /multi {
    echo_subrequest_async POST '/sub' -q 'foo=Foo' -b 'hi';
    echo_subrequest_async PUT '/sub' -q 'bar=Bar' -b 'hello';
}
location /sub {
    echo "querystring: $query_string";
    echo "method: $echo_request_method";
    echo "body: $echo_request_body";
    echo "content length: $http_content_length";
    echo '///';
}
 
# GET /merge?/foo.js&/bar/blah.js&/yui/baz.js will merge the .js resources together
location /merge {
    default_type 'text/javascript';
    echo_foreach_split '&' $query_string;
        echo "/* JS File $echo_it */";
        echo_location_async $echo_it;
        echo;
    echo_end;
}
 
# accessing /if?val=abc yields the "hit" output
# while /if?val=bcd yields "miss":
location ^~ /if {
    set $res miss;
    if ($arg_val ~* '^a') {
        set $res hit;
        echo $res;
    }
    echo $res;
}

这个模块不包含在 Nginx 源码中，安装方法：

1. 首先下载模块源码：https://github.com/agentzh/echo-nginx-module/tags
2. 解压到某个路径，假设为 /path/to/echo-nginx-module
3. 使用下面命令编译并安装 Nginx

$ wget 'http://sysoev.ru/nginx/nginx-1.0.11.tar.gz'
$ tar -xzvf nginx-1.0.11.tar.gz
$ cd nginx-1.0.11/
 
# Here we assume you would install you nginx under /opt/nginx/.
$ ./configure --prefix=/opt/nginx \
--add-module=/path/to/echo-nginx-module
 
$ make -j2
$ make install