Build nginx with lua module and call ImageMagick tool to realize the function of real-time cutting and zooming pictures
First, install LuaJIT.
Wget http://luajit.org/download/LuaJIT-2.0.5.tar.gz
Tar xf LuaJIT-2.0.5.tar.gz
Cd LuaJIT-2.0.5
Make
Make install
Set the environment variable, do not switch the console after setting, otherwise it will be invalid.
Export LUAJIT_LIB=/usr/local/lib
Export LUAJIT_INC=/usr/local/include/luajit-2.0
Make a soft link and load the module
Ln-s / usr/local/lib/libluajit-5.1.so.2 / usr/lib/libluajit-5.1.so.2
Ldconfig
Second, install ImageMagick tools.
Just use yum to install it, it's very convenient.
Yum install-y ImageMagick
Download nginx and ngx_devel_kit and nginx_lua_module modules, and extract them to the specified path. If nginx is already installed on this machine, please ignore downloading and installing nginx.
Wget http://nginx.org/download/nginx-1.12.0.tar.gz
Wget https://github.com/simpl/ngx_devel_kit/archive/v0.3.0.tar.gz
Wget https://github.com/openresty/lua-nginx-module/archive/v0.10.9rc5.tar.gz
Tar xf nginx-1.12.0.tar.gz & & tar xf v0.3.0.tar.gz & & tar xf v0.10.9rc5.tar.gz
Fourth, compile and install nginx, if the machine already has nginx installed, please ignore the installation, but need to recompile, then backup the old nginx files and get the new one over.
. / configure-- prefix=/usr/local/nginx\
-- add-module= (your decompression path) / ngx_devel_kit-0.3.0\
-- add-module= (your decompression path) / lua-nginx-module-0.10.9rc5
(if nginx is already installed in this machine, add the parameters that your nginx has compiled.)
Make
There is no nginx installed, it is installed by make install directly. Refer to https://cache.yisu.com/upload/information/20200309/32/42291.com$' {
Root / opt/qikanjpg
}
Location ~'/ pdgpath/ ([0-9a murzz] +)\ @ ([0-9] +) x ([0-9] +)\. (gif | jpg | png | jpeg) $'{
Root / opt/qikanjpg
Set $p_w_picpath_root'/ opt/qikanjpg/pdgpath'
Set $fileName $1
Set $width $2
Set $height $3
Set $origin $p_w_picpath_root/$fileName.jpg
Set $file_1 $paired picpathically rootpaced ${fileName} @ ${width} x ${height} .jpg
If (!-f $file_1) {
Rewrite_by_lua'
Local comd = "convert-sample".. ngx.var.width.x ".ngx.var.height.." .ngx.var.width.. ".. ngx.var.file_1
Os.execute (comd)
'
}
}
Location ~'/ pdgpath/ ([0-9a murzz] +)\ @ ([0-9] +) x ([0-9] +) _ f\. (gif | jpg | png | jpeg) $'{
Root / opt/qikanjpg
Set $p_w_picpath_root'/ opt/qikanjpg/pdgpath'
Set $fileName $1
Set $width $2
Set $height $3
Set $origin $p_w_picpath_root/$fileName.jpg
Set $file $paired picpathic root f.jpg ${fileName} @ ${width} x ${height} _ f.jpg
If (!-f $file) {
Rewrite_by_lua'
Local command = "convert-strip-quality 80%-resize".. ngx.var.width.x ".ngx.var.width.." ^-gravity center-crop ".ngx.var.width.x" .ngx.var.width.. "x" .ngx.var.width.. "+ zero" .ngx.var.width.. "" .ngx.var.file ".
Os.execute (command)
'
}
}
7. Visit the pictures and test them.
With the configuration file above, put a 1.jpg in / opt/qikanjpg/pdgpath/.
Original http://(your_server_ip):(your_server_port)/pdgpath/1.jpg
Scale the original http://(your_server_ip):(your_server_port)/pdgpath/1@ width x height equal to the smaller values of width and height. JPG
Scale the original image equally according to the larger values of width and height, and then cut the width and height of the original image again from the middle. One area http://(your_server_ip):(your_server_port)/pdgpath/1@ width x height _ f.jpg
For more cutting functions, please check convert-- help to figure it out and add it to local command =.
