Openresty + Lua + graphicsmagick

1. Install graphicsmagick

: Http://sourceforge.net/projects/graphicsmagick/files/graphicsmagick/1.3.19/GraphicsMagick-1.3.19.tar.gz/download? Use_mirror = NCU

tar zxvf GraphicsMagick-1.3.19.tar.gzcd GraphicsMagick-1.3.19makemake install

Install the dependency package ghostscript. If it is not installed, the font cannot be found when adding the watermark.

yum install -y ghostscript

2. Configure nginx. conf

location /down/PersonImg {            set $image_root /usr/local/openresty/nginx/html;            set $file "$image_root$uri";            rewrite_by_lua ‘                local index = string.find(ngx.var.uri, "([0-9]+)x([0-9]+)");                local originalUri = string.sub(ngx.var.uri, 0, index-2);                local area = string.sub(ngx.var.uri, index);                index = string.find(area, "([.])");                area = string.sub(area, 0, index-1);                local image_sizes = {"140x140", "800x800", "90x90"};                function table.contains(table, element)                    for _, value in pairs(table) do                        if value == element then                            return true                        end                    end                    return false                end                if table.contains(image_sizes, area) then                    local command = "/usr/local/GraphicsMagick/bin/gm convert " .. ngx.var.image_root ..  originalUri  .. " -thumbnail " .. area .. " -gravity center -extent " .. area .. " " .. ngx.var.file;                    os.execute(command);                else                    ngx.exit(401)                end            ‘;            alias /usr/local/openresty/nginx/html/down/PersonImg/;        }

3. Access
Http: // 10.10.3.221/down/personimg/3afae457-fdc8-27d3-e2b5-6c10a145a3a6.jpg.90x90.jpg

4. The command to add a watermark is as follows:

/usr/local/GraphicsMagick/bin/gm convert /usr/local/openresty/nginx/html/down/PersonImg/3AFAE457-FDC8-27D3-E2B5-6C10A145A3A6.jpg -font ArialBold -pointsize 45 -fill red -draw "text 10,10 dsideal" /usr/local/openresty/nginx/html/down/PersonImg/3AFAE457-FDC8-27D3-E2B5-6C10A145A3A61111.jpg