AWS Firehose and Go问题

Question

I am trying to send a simple file to Firehose in Go and keep getting:

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x4015b7]

goroutine 1 [running]:
panic(0x8b9260, 0xc82000a0e0)
    /usr/lib/go-1.6/src/runtime/panic.go:481 +0x3e6
main.main()
    /home/ubuntu/go/src/github.com/user/proj/txtParser.go:68 +0x5b7
exit status 2

below is the small script

package main

import (
"fmt"
"github.com/aws/aws-sdk-go/service/firehose"
"github.com/aws/aws-sdk-go/aws/session"
"io/ioutil"
"log"   
)

func main() {

  sess := session.Must(session.NewSession())

  svc := firehose.New(sess)

  firehoseData, err := ioutil.ReadFile("/tmp/adsDat1")

  if err != nil {
    log.Fatal(err)
  }

  var rec *firehose.Record

  var recInput *firehose.PutRecordInput

  rec.SetData(firehoseData)
  recInput.SetDeliveryStreamName("test-ads-txt")
  recInput.SetRecord(rec)

  res, err1 := svc.PutRecord(recInput)

  if err1 != nil {
   log.Fatal(err1)
  }
  fmt.Println(res)
}

Any ideas on what is going on I am sure it is something quite simple but I have been staring at this for too long and can't seem to figure it out.

Answer 1

Figured it out, I declared my variable using a pointer of the type instead of declaring my variable with the type. See how it should be below

 var rec firehose.Record

 var recInput firehose.PutRecordInput

also added the address into these instead of the variable

 recInput.SetRecord(&rec)

 res, err1 := svc.PutRecord(&recInput)

and it works.