when add options `mode: "no-cors"` it break the request and Apollo Server fail, 500 error

Intended outcome: GraphQL call execute without CORS

Actual outcome: server response 500 error

How to reproduce the issue: use this code in the client, occur all the time.

const apolloClient = new ApolloClient({
	networkInterface: createNetworkInterface(
		{
			uri: "http://domain.com/graphql?",
			opts: {
				mode: "no-cors",
			},
		}),
	dataIdFromObject: (value:any) => value.id,
	initialState: {},
});

[helfer]

I’m pretty sure this has nothing to do with apollo-client because it just passes the option to the underlying fetch library. I suggest you open the issue there, or on the server library if you think the server is at fault.

[d9su]

Apparently it’s an issue on the server side, nothing to do with the apollo client. Context: https://github.com/github/fetch/issues/318#issuecomment-249573195

TL;DR is that in no-cors mode, the Content-Type header becomes immutable and can only take one of these values: application/x-www-form-urlencoded, multipart/form-data, or text/plain. Hence if we want to be in no-cors mode, the server needs to be able to handle the content as these content types 🤷‍♂️ .