rdf-body-parser

rdf-body-parser

The rdf-body-parser middleware parses incoming RDF data, parses it and attaches it with the property .graph to the request object. It also attaches the .graph function to the response to send a graph in the requested format.

Usage

Import the module:

const rdfBodyParser = require('rdf-body-parser')

The rdf-body-parser module returns a function to create a middleware. So let's call that function:

app.use(rdfBodyParser())

Now you can use the .graph property and .graph function:

app.use((req, res, next) => {
   // .graph contains the parsed graph
   if (req.graph) {
     console.log(req.graph.toString())
   }

   // .graph sends a graph to the client
   res.graph(rdf.dataset())
})

Attaching

If you don't know if rdf-body-parser is used as middleware, it's possible to attach it dynamically. That is useful inside of a middleware where you want to use an application specific instance (with application options) or the default one. .attach has no callback parameter, instead it returns a Promise.

app.use((req, res, next) => {
  rdfBodyParser.attach(req, res).then(() => {
    if (req.graph) {
      console.log(req.graph.toString())
    }

    res.graph(rdf.dataset())
  })
})