I am newbie at Open Source GIS. I have already create a web mapping using custom tiles and leaflet. I have used my my own database. Tilemill was used to create the tiles and leaflet was used to visualize the tiles. Now I want to create a query of routing and Drive direction on the web mapping. I saw some tutorials of underdark in the following blog where routing visualization was done through QGIS software.
Now I want to know that whether it is possible to use my custom data (shape file) as postGIS to visualize routing on web map or not.