lua-resty-graphics-node

A version of MathJax adapted to TeX graphics

Account

sjnam

Repo

https://github.com/sjnam/lua-resty-graphics-node

$ opm get sjnam/lua-resty-graphics-node

lua-resty-graphics-node

Just as MathJax makes it easier to use the tex math equations on a web page, lua-resty-graphics-node makes it easy to get the corresponding graphics with scripts such as metapost and graphviz on a web page.

Status

Experimental.

Installation

Prerequisites:

TeX Live, An easy way to get up and running with the TeX document production system

OpenResty, A full-fledged web platform that integrates the standard Nginx core, LuaJIT

lua-gumbo, A HTML5 parser and DOM library for Lua

sockexec, A small server for executing local processes

netstring.lua, An implementation of DJB's netstring encoding format for Lua/LuaJIT

lua-resty-exec, Run external programs in OpenResty without spawning a shell or blocking

Graphviz, Graph visualization is a way of representing structural information as diagrams of abstract graphs and networks.

Place lib/resty to your lua library path.

Getting Started

    $ export PATH=/usr/local/openresty/nginx/sbin:$PATH
    $ mkdir ~/www
    $ cd ~/www
    $ mkdir -p conf logs util html/images
    $ sockexec /tmp/exec.sock &
    $ nginx -p `pwd`/ -c conf/nginx.conf

html/sample.html

    <html>
    <body>
    <mplibcode width="250">
    beginfig(1)
      pair A, B, C;
      A:=(0,0); B:=(1cm,0); C:=(0,1cm);
      draw A--B--C;
    endfig;
    </mplibcode>
    <hr>
    <graphviz cmd="dot" width="250">
    digraph G {
      main -> init;
      main -> cleanup;
    }
    </graphviz>
    </body>
    </html>

conf/nginx.conf

    worker_processes  1;
    error_log logs/error.log;
    events {
        worker_connections 1024;
    }
    http {
        server {
            listen 8080;
            include mime.types;
            location /sample {
                default_type text/html;
                content_by_lua_block {
                    require("resty.gxn"):render()
                }
            }
        }
    }

util/gxn.sh

    #!/bin/bash
    
    cd $1
    
    ERROR=0
    
    case $2 in
        mplibcode)
            $5 $3
            ERROR=$?
            ;;
        graphviz)
            $5 -Tsvg $3.gv -o $3.$4
            ERROR=$?
            ;;
        *)
            echo 'NOT SUPPORTED'
    esac
    
    rm -rf *.mp *.mpx *.gv
    
    exit $ERROR

Authors

Soojin Nam

License

mit

Dependencies

jprjr/lua-resty-exec, openresty

Versions

sjnam/lua-resty-graphics-node 0.3.1 by sjnam

A version of MathJax adapted to TeX graphics 2018-12-31 23:40:47
sjnam/lua-resty-graphics-node 0.3.0 by sjnam

A version of MathJax adapted to TeX graphics 2018-12-30 22:54:37