如何在Golang中发出2个并发网络请求

Question

I have two functions that make networks requests:

e.g.:

func request1() (resultTypeA, error) {
  ....
}

func request2() (requestTypeB, error) {
  ...
}

Given that they are two different types, I can't just use one channel. What is the best pattern to parallelize to calls:

resultA, err := request1()
resultB, err := request2()

Answer 1

Use a sync.WorkGroup

var wg sync.WorkGroup
wg.Add(2)
var resultA resultTypeA, errA error
go func() {
    resultA, errA = request1()
    wg.Done()
}()
var resultB resultTypeB, errB error
go func() {
    resultB, errB = request2()
    wg.Done()
}()
wg.Wait()

if errA != nil {
    return errA
}
if errB != nil {
    return errB
}