502 error with /graphql after express-graphql migration to graphql-http

[blee-deloitte]

Hi, first i really appreciate all the works and docs that you guys are supporting to us.
I have been trying to migrate express-graphql to graphql-http but it errors out with 502 server error when i tried.
I found all the available handlerOptions from graphql-http doc and console logged all the correct path of req values to rootValue and context.
Is there anything that i am missing or approaching it in a wrong way?
Here is the migration codes that i created (FYI, the graphqlHTTP from express-graphql is working as expected with the codes below)

FROM

app.use('/graphql', graphqlHTTP(req =>
{
return {
schema,
rootValue: req.rawHeaders,
context: req.headers,
graphiql:process.env.NODE_ENV==='development'?true:false,
validationRules: [NoIntrospection]
}
}
))

TO

app.all('/graphql', createHandler({
schema,
rootValue: req => req.raw.rawHeaders,
context: req => req.headers,
graphiql:process.env.NODE_ENV==='development'?true:false,
validationRules: [NoIntrospection]
}))

Thank you so much!

[enisdenjo]

Not sure where the 502 error comes from, probably express itself since graphql-http has no code points setting it.

I'd recommend reading first the HandlerOptions documentation (or using TypeScript).

• rootValue is not invoked, it is passed directly to the execution
• graphiql option does not exist. Please read the disclaimer in the readme

If the problems persist, I am kindly asking you to create a repro that I can check out. This should expedite the debugging process. Thanks!