Install Nginx-echo module in Nginx

Install Nginx-echo module in Nginx

Nginx-echo can be used to output some information in Nginx. It is a good tool for testing troubleshooting. It can also make a summary of the information from different link addresses. In short, it can help developers. Next let's take a look at how to install and use it.

1. Download Nginx-echo

Cd/usr/local/nginx-1.12.2/
Wget https://github.com/openresty/echo-nginx-module/archive/v0.60.tar.gz

2. decompress the downloaded file

Tar zxvf v0.60.tar.gz

3. Check the previously installed modules.

/Usr/local/nginx/sbin/nginx-V

4. Go to the Nginx installation package directory that was previously downloaded to configure

Cd/usr/local/nginx-1.12.2/
./Configure -- add-module =/usr/local/nginx-1.12.2/echo-nginx-module-0.61 -- add-module =/usr/local/nginx-1.12.2/ngx_image_thumb-master

5. Compile and install the SDK. For upgrade, you can use make upgrade.

Make & make install

6. Using echo, the following content is an official case and I have added my own understanding.

# Simple output: the log address of others is/hello. I don't know why I haven't been able to access it after testing, so add/
Location/hello /{
Echo "hello, world! ";
}

# $ Echo_timer_elapsed timing, which starts computing after being executed by echo_reset_timer
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 .";
}

# Echo_sleep can be output after 2.5s
Location/echo_with_sleep /{
Echo hello;
Echo_flush; # ensure the client can see previous output immediately
Echo_sleep 2.5; # in sec
Echo world;
}

# Add the specified content before and after the source code obtained by the proxy_pass address
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;
}

# Echo_location_async can access other addresses asynchronously without affecting the execution of the current function. The final output value of $ echo_timer_elapsed is 0.
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;
}

# Synchronous execution
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;
}

# Echo_duplicate 3 "--" means repeated output three times "--"
Location/dup /{
Echo_duplicate 3 "--";
Echo_duplicate 1 "END ";
Echo_duplicate 3 "--";
Echo;
}

# Output client request information
Location/echoback /{
Echo_duplicate 1 $ echo_client_request_headers;
Echo "\ r ";
 
Echo_read_request_body;
Echo_request_body;
}

# Output querystring, method, body, content, and other information
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 '///';
}

# Merge multiple JavaScript codes into one URL for output
# 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;
}

# If the address is/if /? Val = abcd, then output hit
# The parameter name is val. The parameter value starts with.
Location/if /{
Set $ res miss;
If ($ arg_val ~ * '^ '){
Set $ res hit;
Echo $ res;
}
Echo $ res;
}

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