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How to carry out Apache service mod_deflate module analysis, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

LAMP Architecture Application practice-Apache Service

Mod_deflate compression module

Today, let's introduce the more commonly used modules, mod_deflate compression module.

One: introduction of mod_deflate module

The mod_deflate compression module provides a DEFLATE output filter that allows the server to compress the content before sending it to the client, saving bandwidth resources

Two: mod_deflate module view

The direct compilation and installation is shown below

[root@Centos modules] # / application/apache/bin/apachectl-l | grep mod_deflate

Mod_deflate.c

Compile and install in DSO mode to see the following

[root@Centos modules] # ls-l | grep defla

-rwxr-xr-x. 1 root root 86591 Sep 18 15:26 mod_deflate.so

However, the above two methods cannot be installed at the same time, otherwise errors will occur.

[root@Centos conf] # / application/apache/bin/apachectl-M | grep deflate

Deflate_module (shared)

View help

[root@Centos httpd-2.4.23] #. / configure-- help | grep deflate

-- enable-deflate Deflate transfer encoding support

Compiling, or installing as a DSO installation is the same as the previous cache module installation, so I will not introduce it here.

Three: mod_deflate configuration

Take a look at the HTTP header information before configuration

[root@Centos modules] # curl-I http://blog.abc.com:9999/

HTTP/1.1 200 OK

Date: Sun, 18 Sep 2016 07:37:58 GMT

Server: Apache/2.4.23 (Unix)

Last-Modified: Fri, 09 Sep 2016 12:19:55 GMT

ETag: "1f-53c122a061992"

Accept-Ranges: bytes

Content-Length: 31

Cache-Control: max-age=31104000

Expires: Wed, 13 Sep 2017 07:37:58 GMT

Content-Type: text/html

Back up and configure the module

[root@Centos conf] # cp httpd.conf httpd.conf.0918

[root@Centos conf] # vi httpd.conf

Intermediate content omitted

DeflateCompressionLevel 9

SetOutputFilter DEFLATE

AddOutputFilterByType DEFLATE text/html text/plain / text/xml

AddOutputFilterByType DEFLATE application/javascript

AddOutputFilterByType DEFLATE text/css

"httpd.conf" 521L, 18903C written

Syntax checking and service restart

[root@Centos conf] # / application/apache/bin/apachectl-t

Syntax OK

[root@Centos conf] # / application/apache/bin/apachectl graceful

[root@Centos conf] # lsof-I tcp:9999

COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME

Httpd 2156 root 8u IPv6 16255 0t0 TCP *: distinct (LISTEN)

Httpd 13911 daemon 8u IPv6 16255 0t0 TCP *: distinct (LISTEN)

Httpd 13912 daemon 8u IPv6 16255 0t0 TCP *: distinct (LISTEN)

Httpd 13913 daemon 8u IPv6 16255 0t0 TCP *: distinct (LISTEN)

[root@Centos conf] # ps-ef | grep http

Root 2156 10 15:13? 00:00:00 / application/apache2.4.23/bin/httpd-k restart

Daemon13911 2156 0 15:49 00:00:00 / application/apache2.4.23/bin/httpd-k restart

Daemon 13912 2156 0 15:49 00:00:00 / application/apache2.4.23/bin/httpd-k restart

Daemon 13913 2156 0 15:49? 00:00:00 / application/apache2.4.23/bin/httpd-k restart

Root 14003 1941 015:50 pts/0 00:00:00 grep http

Test configuration content

[root@Centos conf] # curl-I http://blog.abc.com:9999/deflate.html

HTTP/1.1 200 OK

Date: Sun, 18 Sep 2016 09:32:39 GMT

Server: Apache/2.4.23 (Unix)

Last-Modified: Sun, 18 Sep 2016 08:10:40 GMT

ETag: 309-53cc3bb2de520

Accept-Ranges: bytes

Content-Length: 777

Vary: Accept-Encoding this prompt indicates that compression is enabled

Cache-Control: max-age=31104000

Expires: Wed, 13 Sep 2017 09:32:39 GMT

Content-Type: text/html

Comment out the previous configuration

[root@Centos conf] # / application/apache/bin/apachectl-t

Syntax OK

[root@Centos conf] # / application/apache/bin/apachectl graceful

[root@Centos conf] # ps-ef | grep http

Root 14492 1 0 17:03? 00:00:00 / application/apache2.4.23/bin/httpd-k restart

Daemon 14998 14492 0 17:39? 00:00:00 / application/apache2.4.23/bin/httpd-k restart

Daemon 14999 14492 0 17:39? 00:00:00 / application/apache2.4.23/bin/httpd-k restart

Daemon 15000 14492 0 17:39? 00:00:00 / application/apache2.4.23/bin/httpd-k restart

Root 15083 148 0 17:39 pts/0 00:00:00 grep http

[root@Centos conf] # lsof-I tcp:9999

COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME

Httpd 14492 root 8u IPv6 28964 0t0 TCP *: distinct (LISTEN)

Httpd 14998 daemon 8u IPv6 28964 0t0 TCP *: distinct (LISTEN)

Httpd 14999 daemon 8u IPv6 28964 0t0 TCP *: distinct (LISTEN)

Httpd 15000 daemon 8u IPv6 28964 0t0 TCP *: distinct (LISTEN)

[root@Centos conf] # curl-I http://blog.abc.com:9999/deflate.html

HTTP/1.1 200 OK

Date: Sun, 18 Sep 2016 09:40:08 GMT

Server: Apache/2.4.23 (Unix)

Last-Modified: Sun, 18 Sep 2016 08:10:40 GMT

ETag: 309-53cc3bb2de520

Accept-Ranges: bytes

Content-Length: 777

Cache-Control: max-age=31104000

Expires: Wed, 13 Sep 2017 09:40:08 GMT

Content-Type: text/html

It is found that the relevant prompts will not appear when there is no configuration.

Tip: if the deflate module is not added to the main configuration file after compilation and installation, then we can add such a module by hand

LoadModule deflate_module modules/mod_deflate.so

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