AddSubscriptionError is used to let websocket return an error message after subscription resolver returns a channel.

GetInitPayload gets a map of the data sent with the connection_init message, which is used by graphql clients as a stand-in for HTTP headers.

SendError sends a best effort error to a raw response writer.

SendErrorf wraps SendError to add formatted messages.

GET implements the GET side of the default HTTP transport defined in https://github.com/APIs-guru/graphql-over-http#get.

GRAPHQL implements the application/graphql side of the HTTP transport see: https://graphql.org/learn/serving-over-http/#post-request If the "application/graphql" Content-Type header is present, treat the HTTP POST body contents as the GraphQL query string.

MultipartForm the Multipart request spec https://github.com/jaydenseric/graphql-multipart-request-spec.

MultipartMixed is a transport that supports the multipart/mixed spec.

Options responds to http OPTIONS and HEAD requests.

POST implements the POST side of the default HTTP transport defined in https://github.com/APIs-guru/graphql-over-http#post.

FORM implements the application/x-www-form-urlencoded side of the default HTTP transport.

InitPayload is a structure that is parsed from the websocket init message payload.