This can be used to reproduce EOF errors while using GitHubs API, because GitHub closes keep-alive connections after 60s.

reproduce_github_eof.go

package main

import (
	"bytes"
	"fmt"
	"io"
	"io/ioutil"
	"log"
	"net/http"
	"net/http/httptrace"
	"net/url"
	"time"
)

func main() {
	bodyString := "{\"query\":\"\\nfragment RepositoryFields on Repository {\\n\\tid\\n\\tdatabaseId\\n\\tnameWithOwner\\n\\tdescription\\n\\turl\\n\\tisPrivate\\n\\tisFork\\n\\tisArchived\\n\\tviewerPermission\\n}\\n\\tquery {\\nrepo0: repository(owner: \\\"sourcegraph\\\", name: \\\"sourcegraph\\\") { ... on Repository { ...RepositoryFields } }\\n}\",\"variables\":{}}"

	for {
		log.Println("Sending new request ---------------------------")
		body := ioutil.NopCloser(bytes.NewBufferString(bodyString))

		headers := make(http.Header)
		headers.Add("User-Agent", "Go-http-client/1.1")
    // REPLACE WITH YOUR TOKEN
		headers.Add("Authorization", "bearer TOKEN")
		headers.Add("Content-Type", "application/json; charset=utf-8")

		req := &http.Request{
			Method: "POST",
			Body:   body,
			URL: &url.URL{
				Scheme:   "https",
				Host:     "api.github.com",
				Path:     "/graphql",
				RawQuery: "",
			},
			Header: headers,
		}

		trace := &httptrace.ClientTrace{
			GotConn: func(connInfo httptrace.GotConnInfo) {
				fmt.Printf("Got Conn: %+v\n", connInfo)
			},
		}

		req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))

		resp, err := http.DefaultClient.Do(req)
		if err != nil {
			fmt.Printf("err=%+v\n", err)
			return
		}

		defer resp.Body.Close()
		io.Copy(ioutil.Discard, resp.Body)

		time.Sleep(time.Duration(60) * time.Second)
	}
}