Erlang + Apple Push Notification [Error with invalid token]
I am currently trying to create a push messaging module for Erlang.
When the token is valid everything works fine ... The problem is that the old device token (which is not valid now) is rejected. I understand that an invalid token will be rejected by apns with a 6 byte socket message and will invalidate the connection (which is really stupid in my opinion, no matter ...)
The thing is, I am not getting the 6 byte socket message that APNS is supposed to provide me with my module, for example the control process is not listening on the socket.
Here's my code:
-module(pushiphone).
-behaviour(gen_server).
-export([start/1, init/1, handle_call/3, handle_cast/2, code_change/3, handle_info/2, terminate/2]).
-import(ssl, [connect/4]).
-record(push, {socket, pid, state, cert, key}).
start(Provisioning) ->
gen_server:start_link(?MODULE, [Provisioning], []).
init([Provisioning]) ->
gen_server:cast(self(), {connect, Provisioning}),
{ok, #push{pid=self()}}.
send(Socket, DT, Payload) ->
PayloadLen = length(Payload),
DTLen = size(DT),
PayloadBin = list_to_binary(Payload),
Packet = <<0:8,
DTLen:16/big,
DT/binary,
PayloadLen:16/big,
PayloadBin/binary>>,
ssl:send(Socket, Packet).
handle_call(_, _, P) ->
{noreply, P}.
handle_cast({connect, Provisioning}, P) ->
case Provisioning of
dev -> Address = "gateway.sandbox.push.apple.com";
prod -> Address = "gateway.push.apple.com"
end,
Port = 2195,
Cert="/apns-" ++ atom_to_list(Provisioning) ++ "-cert.pem",
Key="/apns-" ++ atom_to_list(Provisioning) ++ "-key.pem",
Options = [{certfile, Cert}, {keyfile, Key}, {password, "********"}, {mode, binary}, {active, false}],
Timeout = 1000,
{ok, Socket} = ssl:connect(Address, Port, Options, Timeout),
ssl:controlling_process(Socket, self()), %% Necessary ??
gproc:reg({n,l, pushiphone}),
{noreply, P#push{socket=Socket}};
handle_cast(_, P) ->
{noreply, P}.
handle_info({ssl, Socket, Data}, P) ->
<<Command, Status, SomeID:32/big>> = Data,
io:fwrite("[PUSH][ERROR]: ~p / ~p / ~p~n", [Command, Status, SomeID]),
ssl:close(Socket),
{noreply, P};
handle_info({push, message, DT, Badge, [Message]}, P) ->
Payload = "{\"aps\":{\"alert\":\"" ++ Message ++ "\",\"badge\":" ++ Badge ++ ",\"sound\":\"" ++ "msg.caf" ++ "\"}}",
send(P#push.socket, DT, Payload),
{noreply, P};
handle_info({ssl_closed, _SslSocket}, P) ->
io:fwrite("SSL CLOSED !!!!!!~n"),
{stop, normal, P};
handle_info(AnythingElse, P) ->
io:fwrite("[ERROR][PUSH][ANYTHING ELSE] : ~p~n", [AnythingElse]),
{noreply, P}.
code_change(_, P, _) ->
{ok, P}.
terminate(_, _) ->
ok.
So when I run the module and I click on a valid token it is pushed to the phone, but when I click on an invalid token and then a valid token the valid token will not get clicked ...
I am aware that I have to listen to the loopback service to remove the device token from my database, but I also need to know if the push gateway has been stripped of my connection to reconnect.
So here's the real question : why isn't my genserver receiving an error packet (which should match handle_info ({ssl, Socket, Data}, P))?
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Your socket is configured with active = false. You won't get any messages unless you set it active = true (or re-active = once). See the documentation for inet: setopts / 2 .
You also don't need to set control_process to self ().
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