How to send a push notification using Erlang?

Question

I\'m trying to send a push notification to APNs using Erlang. This is the code I came up with so far:

-module(apnstest2).
-export([connect/0]).

connect() ->
         


        

Answer 1

I see two mistakes:

• Token should be passed in binary and not in hex ascii.
• You can't use the binary syntax to turn lists into binaries.

For parsing hex to an integer and then down to binary use something like this:

Token = "dead",
TokenNum = erlang:list_to_integer(Token, 16),
TokenBin = <>,

Build the protocol packet with something like this:

TokenBin = ...,
Payload = <<"Payload">>,
PayloadSize = byte_size(Payload),
Packet = <<0:8, 32:16, TokenBin/binary, PayloadSize:16, Payload/binary>>,