The Echo module of Nginx--echo-nginx-module

Nginx has an echo module that can be used to output some simple information, such as:

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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#   igorlocation /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 requestlocation /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 togetherlocation /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;}

This module is not included in the Nginx source code, the installation method:

1. First download Module source code: Https://github.com/agentzh/echo-nginx-module/tags
2. Extract to a path, assuming/path/to/echo-nginx-module
3. Use the command below to compile and install Nginx

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$ 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

Try it, this module is also the spring development of the Chinese People @ Chapter.

Http://www.oschina.net/question/12_45735?fromerr=jyurMByB

Nginx Echo Module--echo-nginx-module (ext.)