text: // +build go1.6
  
  package s3
  
  import (
  	"github.com/aws/aws-sdk-go/aws"
  	"github.com/aws/aws-sdk-go/aws/request"
  )
  
  func platformRequestHandlers(r *request.Request) {
  	if r.Operation.HTTPMethod == "PUT" {
  		// 100-Continue should only be used on put requests.
  		r.Handlers.Sign.PushBack(add100Continue)
  	}
  }
  
  func add100Continue(r *request.Request) {
  	if aws.BoolValue(r.Config.S3Disable100Continue) {
  		return
  	}
  	if r.HTTPRequest.ContentLength < 1024*1024*2 {
  		// Ignore requests smaller than 2MB. This helps prevent delaying
  		// requests unnecessarily.
  		return
  	}
  
  	r.HTTPRequest.Header.Set("Expect", "100-Continue")
  }
  