qrencode for openresty
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README.md
qrencode.c

README.md

lua-resty-qrencode

lua-resty-qrencode is a wrapper of libqrencode with libpng for OpenResty(nginx_lua).

Install

lua-resty-qrencode is dependent on libqrencode and libpng, so make sure these are installed before compile it.

MacOS

$ brew install libqrencode
$ git clone https://github.com/orangle/lua-resty-qrencode.git
$ cd lua-resty-qrencode
$ make
$ make install

defalut openresty PREFIX is /usr/local/openresty, if you have a different path, please read Makefile and change the path.

Other

please install libqrencode and libpng, and read Makefile. or you can see http://blog.csdn.net/orangleliu/article/details/64912578#t0

Example usage

show in cli

    location /qrcode {
        content_by_lua_block {
            local qr = require("qrencode")
            local args = ngx.req.get_uri_args()
            local text = args.text

            if text == nil or text== "" then
                ngx.say('need a text param')
                ngx.exit(404)
            end

            ngx.say(qr {
                text=text,
                level="L",
                kanji=false,
                ansi=true,
                size=4,
                margin=2,
                symversion=0,
                dpi=78,
                casesensitive=true,
                foreground="48AF6D",
                background="3FAF6F"
            })
        }
    }

test url like

curl 'http://127.0.0.1:8008/qrcode?text=http://orangleliu.info'

when pass a table, "text" is required and other is optional.

show in browser

location /qrcode {
        content_by_lua_block {
            local qr = require("qrencode")
            local args = ngx.req.get_uri_args()
            local text = args.text

            if text == nil or text== "" then
                ngx.say('need a text param')
                ngx.exit(404)
            end

            ngx.say(qr {
                    text=text,
                    level="L",
                    kanji=false,
                    ansi=false,
                    size=4,
                    margin=2,
                    symversion=0,
                    dpi=78,
                    casesensitive=true,
                    foreground="000000",
                    background="FFFFFF"
            })
        }

        default_type image/png;
        add_header Expires "Fri, 01 Jan 1980 00:00:00 GMT";
        add_header Pragma "no-cache";
        add_header Cache-Control "no-cache, max-age=0, must-revalidate";
    }

type url like 'http://127.0.0.1:8008/qrcode?text=http://orangleliu.info' in browser, you can get a png image.