now is not possible to do batch queries. I suggest just small changes to give that possibility.
that functionality is actively used by Apollo for optimizing the query execution time.
the suggested changes are attached
// router.go line 95
gqlRequests, err := h.unmarshalHTTPRequest(r)
if err != nil {
h.logger.Debug("can not unmarshal graphql request from http request", zap.Error(err))
reporter.error = writeResponseErrors(err, w)
return
}
n := r.Context().Value(nextHandlerCtxKey).(caddyhttp.Handler)
for _, gqlRequest := range *gqlRequests {
if err = h.validateGraphqlRequest(&gqlRequest); err != nil {
reporter.error = writeResponseErrors(err, w)
return
}
h.addMetricsBeginRequest(&gqlRequest)
defer func(startedAt time.Time) {
h.addMetricsEndRequest(&gqlRequest, time.Since(startedAt))
}(time.Now())
if h.Caching != nil {
cachingRequest := newCachingRequest(r, h.schemaDocument, h.schema, &gqlRequest)
reverse := caddyhttp.HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
return h.ReverseProxy.ServeHTTP(w, r, n)
})
if err = h.Caching.HandleRequest(w, cachingRequest, reverse); err != nil {
reporter.error = writeResponseErrors(err, w)
return
}
return
}
}
reporter.error = h.ReverseProxy.ServeHTTP(w, r, n)
}
func (h *Handler) unmarshalHTTPRequest(r *http.Request) (*[]graphql.Request, error) {
gqlRequests := make([]graphql.Request, 0)
rawBody, _ := ioutil.ReadAll(r.Body)
r.Body = ioutil.NopCloser(bytes.NewBuffer(rawBody))
copyHTTPRequest, err := http.NewRequest(r.Method, r.URL.String(), ioutil.NopCloser(bytes.NewBuffer(rawBody))) // nolint:noctx
if err != nil {
return nil, err
}
requestBytes, err := ioutil.ReadAll(copyHTTPRequest.Body)
if err != nil {
return nil, err
}
if len(requestBytes) == 0 {
return nil, graphql.ErrEmptyRequest
}
if err = json.Unmarshal(requestBytes, &gqlRequests); err != nil {
var gqlRequest graphql.Request
if e := json.Unmarshal(requestBytes, &gqlRequest); e != nil {
return nil, e
}
gqlRequests = append(gqlRequests, gqlRequest)
}
for index, request := range gqlRequests {
if err = normalizeGraphqlRequest(h.schema, &request); err != nil {
return nil, err
}
gqlRequests[index] = request
}
return &gqlRequests, nil
}