Request: Batch Client Query

[verzil]

I am just wondering are we going to have a service that supports batching on the transportation layer? Like how apollo server does. Or do we have to batch on the query level.

[danielrearden]

For context, this is how Apollo Server does it. The request body can be an array of objects, in which case they are effectively processed as individual requests and then aggregated and sent back as an array of response objects.

[AndyHubert]

Here is a simple solution I wrote up until something official is available. Works so far, though I cannot promise I won't find any issues.

const runGraphql = graphqlHTTP({
  schema,
  rootValue,
})

app.use('/graphql', async (req, res, next) => {

  // handle batch queries
  if(req.body instanceof Array) {
    res.origSend = res.send
    const origReqBody = req.body
    const responseBodies = []
    for(let graphqlQuery of origReqBody) {
      await new Promise(resolve => {
        res.send = body => {
          responseBodies.push(body)
          resolve()
        }
        req.body = graphqlQuery
        runGraphql(req, res, next)
      })
    }
    res.origSend(`[${responseBodies.join(',')}]`)
    return
  }

  runGraphql(req, res, next)

})

[enisdenjo]

This library has been deprecated and this repo will be archived soon. It has been superseded by graphql-http.

Furthermore, if you seek a fully-featured, well-maintained and performant server - I heavily recommend GraphQL Yoga!