Summary:
Ref T4324. Currently, an Aphlict client (with a corresponding connection to the Aphlict Server) is created for every tab that a user has open. This significantly affects the scalability of Aphlict as a service. Instead, we can use `LocalConnection` instances to coordinate the communication of multiple Aphlict clients to the server.
Similar functionality existed prior to D2704, but was removed as the author was not able to get this functionality working as intended. It seems that the main issue with the initial attempt was the use of the `setTimeout` function, which seemed to be a blocking call which prevented messages from being received. I have instead used an event-based model using a `Timer` object.
Roughly this works as follows:
# The first instance will create an `AphlictClient` and an `AphlictMaster`. The `AphlictClient` will register itself with the `AphlictMaster` and will consequently be notified of incoming messages.
# The `AphlictClient` is then responsible for pinging the `AphlictMaster` at regular intervals. If the client does not ping the master in a given period of time, the master will assume that the client is dead and will remove the client from the pool.
# Similarly, the `AphlictMaster` is required to respond to pings with a "pong" response. The pong response lets the clients know that the `AphlictMaster` is still alive. If the clients do not receive a pong in a given period of time, then the clients will attempt to spawn a new master.
Test Plan: I have tested this on our Phabricator install with a few tabs opened and inspecting the console output. I will upload a screencast of my test results.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: epriestley, Korvin
Maniphest Tasks: T4324
Differential Revision: https://secure.phabricator.com/D9327
Summary: Ref T4324. One of the server we start just sends pre-canned XML responses. Separate it out of the main file and hand it all the objects it interacts with in structured, reasonable ways.
Test Plan: Hit "Send Test Notification", saw notification, saw flash policy info in the log.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T4324
Differential Revision: https://secure.phabricator.com/D8257
Summary:
Ref T4324.
- Create `Listener` to represent listening clients.
- Create `ListenerList` to represent the current list of clients.
- Create `Logfile` to handle logging.
Test Plan: Clicked "Send Test Notification", verified logs, status and notifications all work correctly.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T4324
Differential Revision: https://secure.phabricator.com/D8256
Summary:
Ref T4324. The server code is probably going to get a fair amount more complicated, so allow it to load Javelin classes in a mostly-reasonable way.
This integration has a few warts, but should be good enough to let us manage complexity through the next iteration of the server.
(Mostly I just want the concicse Javelin mechanism for defining new classes.)
Version bump is just so I can figure stuff out if this creates any issues for users based on which version of things they're running.
Test Plan: Started server, posted some messages through it.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T4324
Differential Revision: https://secure.phabricator.com/D8253
Summary: Ref T4324. Add some version information to the server status output, and setup checks to test for an unreachable or out-of-date server.
Test Plan:
- With server down, hit reasonable setup check.
- With server up and at a bad version, hit reasonable setup check.
- Viewed `/notification/status/`.
- The CSS thing fixes this:
{F114445}
Reviewers: btrahan, chad
Reviewed By: chad
CC: chad, aran
Maniphest Tasks: T4324
Differential Revision: https://secure.phabricator.com/D8251
Summary: If `jsxmin` is not available, use a pure PHP implementation instead (JsShrink).
Test Plan:
- Ran `arc lint --lintall` on all JS and fixed every relevant warning.
- Forced minification on and browsed around the site using JS behaviors. Didn't hit anything problematic.
Reviewers: vrana, btrahan
Reviewed By: vrana
CC: aran, Korvin
Differential Revision: https://secure.phabricator.com/D5670
Summary: At some point, Node started requiring us to read data before we can get the 'end' event, it seems. Fixes T2953.
Test Plan: Ran server in `--foreground` mode on node v0.11.0, made request to `/status/`, got response.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2953
Differential Revision: https://secure.phabricator.com/D5666
Summary: We allow user to specify the host to listen to but we listen on 127.0.0.1 instead.
Test Plan:
Hardcoded the path and verified that I can connect to the host from other machine.
Verified that `localhost` still doesn't allow remote connections.
Reviewers: ddfisher, epriestley, nh
Reviewed By: epriestley
CC: aran, Korvin
Differential Revision: https://secure.phabricator.com/D4238
Summary:
This commit doesn't change license of any file. It just makes the license implicit (inherited from LICENSE file in the root directory).
We are removing the headers for these reasons:
- It wastes space in editors, less code is visible in editor upon opening a file.
- It brings noise to diff of the first change of any file every year.
- It confuses Git file copy detection when creating small files.
- We don't have an explicit license header in other files (JS, CSS, images, documentation).
- Using license header in every file is not obligatory: http://www.apache.org/dev/apply-license.html#new.
This change is approved by Alma Chao (Lead Open Source and IP Counsel at Facebook).
Test Plan: Verified that the license survived only in LICENSE file and that it didn't modify externals.
Reviewers: epriestley, davidrecordon
Reviewed By: epriestley
CC: aran, Korvin
Maniphest Tasks: T2035
Differential Revision: https://secure.phabricator.com/D3886
Summary: Depends on D2926. Adds a simple CLI client for Aphlict to make it easier to debug stuff.
Test Plan: Ran client, saw debug messages.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Differential Revision: https://secure.phabricator.com/D2927
Summary: Add a `notification.debug` setting that shows debug info in the browser. Also improve some logging/error handling stuff and fix a bug with host names.
Test Plan: {F13098}
Reviewers: jungejason, btrahan, vrana
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T944
Differential Revision: https://secure.phabricator.com/D2810
Summary:
- Move to port 22280 by default.
- Warn when running as non-root.
- Allow subscription and publish/admin ports to be configured.
- Allow server to drop root after binding to 843.
- Allow log path to be configured.
- Add /status/ admin URI which shows server status.
- Return HTTP 400 Bad Request for other requests, instead of hanging.
- Minor formatting cleanup.
Test Plan:
Ran without root:
$ node aphlict_server.js
...got a good error message. Ran with --user:
$ sudo node aphlict_server.js --user=epriestley
...verified server dropped permissions. Ran with --port / --admin. Hit /status/ with GET, got status. Hit other URLs with GET, got 400.
Reviewers: allenjohnashton, ddfisher, keebuhm
Reviewed By: ddfisher
CC: aran
Differential Revision: https://secure.phabricator.com/D2737
Summary:
Adds the node.js Aphlict server, the flash Aphlict client, and some
supporting javascript. Built on top of - and requires - D2703 (which is still
in progress). Will likely work with no modification on top of the final
version, though.
The node server is currently run with
sudo node support/aphlict/server/aphlict_server.js
Test Plan: tested locally
Reviewers: epriestley
Reviewed By: epriestley
CC: allenjohnashton, keebuhm, aran, Korvin
Differential Revision: https://secure.phabricator.com/D2704
Summary: Provide a reasonable JS API for the Aphlict client. Provide an example behavior to invoke it.
Test Plan:
Ran "aphlict_server.js" with:
$ sudo node aphlict_server.js
Loaded /aphlict/. Opened console. Got "hello" from the server every second.
Got reasonable errors with the server not present ("Security exception", but this is because it can't connect to port 843 to access the policy server).
Reviewers: ddfisher, keebuhm, allenjohnashton, btrahan
Reviewed By: btrahan
CC: aran, epriestley
Maniphest Tasks: T944
Differential Revision: https://secure.phabricator.com/D1800
Summary:
This is purely a prototype at the moment, but the basic functionality sort of
works.
I'm not sure how far I want to go with this but I think we might be able to get
somewhere without it being gross.
The idea here is to build a notification server WITHOUT using Comet, since Comet
is extremely difficult and complicated.
Instead, I use Flash on the client. LocalConnection allows flash instances to
talk to each other and connect() can be used as a locking primitive. This allows
all the instances to elect a master instance in a race-safe way. The master is
responsible for opening a single connnection to the server.
On the server, I use Node.js since PHP is pretty unsuitable for this task.
See Github Issue #3: https://github.com/facebook/phabricator/issues/3
One thing I need to figure out next is if I can reasonably do SSL/TSL over Flash
(it looks like I can, in theory, with the as3crypto library) or if the server
needs to just send down version information and trigger a separate Ajax call on
the client.
Test Plan:
Created a client pool and connected it to the server, with election and failover
apparently working correctly.
Reviewed By: aran
Reviewers: Girish, aran, jungejason, tuomaspelkonen, davidrecordon
Commenters: Girish, davidrecordon
CC: aran, epriestley, Girish, davidrecordon
Differential Revision: 284
