Error handling go-libapns

gistfile1.go

package main

import (
    apns "github.com"
    "ioutils"
    "net"
    "time"
)

func main() {

    apnsConnection, err := apns.NewAPNSConnection(&APNSConfig{
        CertificateBytes: ioutil.ReadFile("path/to/cert.pem"),
        KeyBytes: ioutil.Readfile("path/to/key.pem")
    })

    if err != nil {
        //probably bad cert, or bad network 
        panic(err)
    }

    var payload *apns.Payload
    var sendError *apns.ConnectionClose
    for i := 0; i < 1000; i++ {
        if sendError != nil {
            break
        }
        payload = &apns.Payload {
            Token: getTokenForUser(i),
            AlertText: "This is a push notification",
        }

        select {
            case apnsConnection.SendChannel <- payload:
                //hooray! we wrote the payload to the socket
                break
            case sendError = <- apnsConnection.CloseChannel:
                //something happened to our apns connection :(
                //also it has disconnected itself from the socket
                break
        }
    }

    if sendError != nil {
        //*list.List list of payloads that need to be resent
        sendError.UnsentPayloads

        //*apns.Payload payload which apple indicates caused error
        //    (only set if a payload caused the error)
        sendError.ErrorPayload

        //*apns.AppleError actual apple error information
        sendError.Error

        //bool if this is true, then we overflowed our buffer and
        //    some notifications were lost due to error
        sendError.UnsentPayloadBufferOverflow
    } else {
        //everything was consumed by go-libapns
        //unfortunately this doesn't mean everything was sent yet (due to internal framing)
        //we must wait for either an error or for a short period to guarantee the network has flushed
        select {
            case <- time.After(1 * time.Second):
                //should be good
                apnsConnection.Disconnect()
                break
            case sendError = <- apnsConnection.CloseChannel:
                //something happened to our apns connection :(
                //also it has disconnected itself from the socket
                break
        }
    }

}