I'm developing a gmail client based on google api.
I have a list of labels obtained through this call
r, err := s.gClient.Service.Users.Labels.List(s.gClient.User).Do()
Then, for every label I need to get details
for _, l := range r.Labels {
d, err := s.gClient.Service.Users.Labels.Get(s.gClient.User, l.Id).Do()
}
I'd like to handle the loop in a more powerful way so I have implemented a goroutine in the loop:
ch := make(chan label.Label)
for _, l := range r.Labels {
go func(gmailLabels *gmailclient.Label, gClient *gmail.Client, ch chan<- label.Label) {
d, err := s.gClient.Service.Users.Labels.Get(s.gClient.User, l.Id).Do()
if err != nil {
panic(err)
}
// Performs some operation with the label `d`
preparedLabel := ....
ch <- preparedLabel
}(l, s.gClient, ch)
}
for i := 0; i < len(r.Labels); i++ {
lab := <-ch
fmt.Printf("Processed %v
", lab.LabelID)
}
The problem with this code is that gmail api has a rate limit, so, I get this error:
panic: googleapi: Error 429: Too many concurrent requests for user, rateLimitExceeded
What is the correct way to handle this situation?