the Topic header of the request was not specified and was required

my code works with the development certificate. But when I try and use the production certificate it gives me 'the Topic header of the request was not specified and was required' I did change host from push.Development to push.Production but it doesn't work. I also made sure that my .p12 file is made using both the cert and key.

[yuanlida]

I met the same problem.

[kmcrawford]

I was able to fix by using the app id set as a header:

headers := push.Headers{Topic: appId} //"com.myapp.app"
id, err := service.Push(token, &headers, b)

[froodian]

you can also generally use certificate.TopicFromCert to get this bundle id if you don't have it on hand.

[yuanlida]

Thanks,I add these codes in file service.go:
req.Header.Set("Content-Type", "application/json")
req.Header.Set("apns-topic", ".......")
headers.set(req.Header)

[nathany]

It would be a good idea to document TopicFromCert in the README.