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cowboy/test/handlers/long_polling_h.erl

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Make loop handlers work with SPDY Adds a loop_handler test suite that runs all tests under HTTP, HTTPS, SPDY each with and without the compress option enabled. Fixes output filtering that used to filter more than it should have. This forces us to parse the string sent by the emulator, which means it's probably not perfect yet. But it should at least not hide errors we want to see. Fix a crash in the output filtering code that entirely disabled output. Now when there is a crash the normal tty output is restored. Handlers are now in test/handlers/ as they can be reused between suites. Only generate a single certificate for the whole ct run to speed things up when we got many different test groups each needing certificates.
2014-04-26 13:46:55 +02:00
%% This module implements a loop handler for long-polling.
%% It starts by sending itself a message after 200ms,
%% then sends another after that for a total of 3 messages.
%% When it receives the last message, it sends a 102 reply back.
-module(long_polling_h).
Unify the init and terminate callbacks This set of changes is the first step to simplify the writing of handlers, by removing some extraneous callbacks and making others optional. init/3 is now init/2, its first argument being removed. rest_init/2 and rest_terminate/2 have been removed. websocket_init/3 and websocket_terminate/3 have been removed. terminate/3 is now optional. It is called regardless of the type of handler, including rest and websocket. The return value of init/2 changed. It now returns {Mod, Req, Opts} with Mod being either one of the four handler type or a custom module. It can also return extra timeout and hibernate options. The signature for sub protocols has changed, they now receive these extra timeout and hibernate options. Loop handlers are now implemented in cowboy_long_polling, and will be renamed throughout the project in a future commit.
2014-09-26 15:58:44 +03:00
-export([init/2]).
Make loop handlers work with SPDY Adds a loop_handler test suite that runs all tests under HTTP, HTTPS, SPDY each with and without the compress option enabled. Fixes output filtering that used to filter more than it should have. This forces us to parse the string sent by the emulator, which means it's probably not perfect yet. But it should at least not hide errors we want to see. Fix a crash in the output filtering code that entirely disabled output. Now when there is a crash the normal tty output is restored. Handlers are now in test/handlers/ as they can be reused between suites. Only generate a single certificate for the whole ct run to speed things up when we got many different test groups each needing certificates.
2014-04-26 13:46:55 +02:00
-export([info/3]).
-export([terminate/3]).
Unify the init and terminate callbacks This set of changes is the first step to simplify the writing of handlers, by removing some extraneous callbacks and making others optional. init/3 is now init/2, its first argument being removed. rest_init/2 and rest_terminate/2 have been removed. websocket_init/3 and websocket_terminate/3 have been removed. terminate/3 is now optional. It is called regardless of the type of handler, including rest and websocket. The return value of init/2 changed. It now returns {Mod, Req, Opts} with Mod being either one of the four handler type or a custom module. It can also return extra timeout and hibernate options. The signature for sub protocols has changed, they now receive these extra timeout and hibernate options. Loop handlers are now implemented in cowboy_long_polling, and will be renamed throughout the project in a future commit.
2014-09-26 15:58:44 +03:00
init(Req, _) ->
Make loop handlers work with SPDY Adds a loop_handler test suite that runs all tests under HTTP, HTTPS, SPDY each with and without the compress option enabled. Fixes output filtering that used to filter more than it should have. This forces us to parse the string sent by the emulator, which means it's probably not perfect yet. But it should at least not hide errors we want to see. Fix a crash in the output filtering code that entirely disabled output. Now when there is a crash the normal tty output is restored. Handlers are now in test/handlers/ as they can be reused between suites. Only generate a single certificate for the whole ct run to speed things up when we got many different test groups each needing certificates.
2014-04-26 13:46:55 +02:00
erlang:send_after(200, self(), timeout),
Allow passing options to sub protocols Before this commit we had an issue where configuring a Websocket connection was simply not possible without doing magic, adding callbacks or extra return values. The init/2 function only allowed setting hibernate and timeout options. After this commit, when switching to a different type of handler you can either return {module, Req, State} or {module, Req, State, Opts} where Opts is any value (as far as the sub protocol interface is concerned) and is ultimately checked by the custom handlers. A large protocol like Websocket would accept only a map there, with many different options, while a small interface like loop handlers would allow passing hibernate and nothing else. For Websocket, hibernate must be set from the websocket_init/1 callback, because init/2 executes in a separate process. Sub protocols now have two callbacks: one with the Opts value, one without. The loop handler code was largely reworked and simplified. It does not need to manage a timeout or read from the socket anymore, it's the job of the protocol code. A lot of unnecessary stuff was therefore removed. Websocket compression must now be enabled from the handler options instead of per listener. This means that a project can have two separate Websocket handlers with different options. Compression is still disabled by default, and the idle_timeout value was changed from inifnity to 60000 (60 seconds), as that's safer and is also a good value for mobile devices.
2017-02-18 18:26:20 +01:00
{cowboy_loop, Req, 2, hibernate}.
Make loop handlers work with SPDY Adds a loop_handler test suite that runs all tests under HTTP, HTTPS, SPDY each with and without the compress option enabled. Fixes output filtering that used to filter more than it should have. This forces us to parse the string sent by the emulator, which means it's probably not perfect yet. But it should at least not hide errors we want to see. Fix a crash in the output filtering code that entirely disabled output. Now when there is a crash the normal tty output is restored. Handlers are now in test/handlers/ as they can be reused between suites. Only generate a single certificate for the whole ct run to speed things up when we got many different test groups each needing certificates.
2014-04-26 13:46:55 +02:00
info(timeout, Req, 0) ->
Add a lot of todos
2016-08-10 11:52:41 +02:00
%% @todo Why 102?
Rename 'shutdown' close reason and tuples to 'stop' The 'shutdown' atom has a specific meaning inside OTP. We are instead going to use 'stop' which is pretty much the equivalent of what we actually do. 'shutdown' is now reserved for future special processes implementation.
2014-11-07 19:22:36 +02:00
{stop, cowboy_req:reply(102, Req), 0};
Make loop handlers work with SPDY Adds a loop_handler test suite that runs all tests under HTTP, HTTPS, SPDY each with and without the compress option enabled. Fixes output filtering that used to filter more than it should have. This forces us to parse the string sent by the emulator, which means it's probably not perfect yet. But it should at least not hide errors we want to see. Fix a crash in the output filtering code that entirely disabled output. Now when there is a crash the normal tty output is restored. Handlers are now in test/handlers/ as they can be reused between suites. Only generate a single certificate for the whole ct run to speed things up when we got many different test groups each needing certificates.
2014-04-26 13:46:55 +02:00
info(timeout, Req, Count) ->
erlang:send_after(200, self(), timeout),
Improve handler interface and documentation This change simplifies a little more the sub protocols mechanism. Aliases have been removed. The renaming of loop handlers as long polling handlers has been reverted. Plain HTTP handlers now simply do their work in the init/2 callback. There is no specific code for them. Loop handlers now follow the same return value as Websocket, they use ok to continue and shutdown to stop. Terminate reasons for all handler types have been documented. The terminate callback is now appropriately called in all cases (or should be). Behaviors for all handler types have been moved in the module that implement them. This means that cowboy_handler replaces the cowboy_http_handler behavior, and similarly cowboy_loop replaces cowboy_loop_handler, cowboy_websocket replaces cowboy_websocket_handler. Finally cowboy_rest now has the start of a behavior in it and will have the full list of optional callbacks defined once Erlang 18.0 gets released. The guide has been reorganized and should be easier to follow.
2014-09-30 20:12:13 +03:00
{ok, Req, Count - 1, hibernate}.
Make loop handlers work with SPDY Adds a loop_handler test suite that runs all tests under HTTP, HTTPS, SPDY each with and without the compress option enabled. Fixes output filtering that used to filter more than it should have. This forces us to parse the string sent by the emulator, which means it's probably not perfect yet. But it should at least not hide errors we want to see. Fix a crash in the output filtering code that entirely disabled output. Now when there is a crash the normal tty output is restored. Handlers are now in test/handlers/ as they can be reused between suites. Only generate a single certificate for the whole ct run to speed things up when we got many different test groups each needing certificates.
2014-04-26 13:46:55 +02:00
Rename 'shutdown' close reason and tuples to 'stop' The 'shutdown' atom has a specific meaning inside OTP. We are instead going to use 'stop' which is pretty much the equivalent of what we actually do. 'shutdown' is now reserved for future special processes implementation.
2014-11-07 19:22:36 +02:00
terminate(stop, _, 0) ->
Make loop handlers work with SPDY Adds a loop_handler test suite that runs all tests under HTTP, HTTPS, SPDY each with and without the compress option enabled. Fixes output filtering that used to filter more than it should have. This forces us to parse the string sent by the emulator, which means it's probably not perfect yet. But it should at least not hide errors we want to see. Fix a crash in the output filtering code that entirely disabled output. Now when there is a crash the normal tty output is restored. Handlers are now in test/handlers/ as they can be reused between suites. Only generate a single certificate for the whole ct run to speed things up when we got many different test groups each needing certificates.
2014-04-26 13:46:55 +02:00
ok;
terminate({error, overflow}, _, _) ->
ok.
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