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mirror of https://github.com/Jermolene/TiddlyWiki5 synced 2024-11-15 06:14:53 +00:00
TiddlyWiki5/plugins/tiddlywiki/tiddlyweb/sse-client.js
Nicolas Petton 17b4f53ba2
Add server sent events (#5279)
* Create server-sent-events.js

* Create sse-change-listener.js

* Implement server sent events

* Convert to ES5 and wrap in function

* Use the host string from tiddlyweb

* Improve comments in sse-server.js

* Can't use object reference as key

* Add retry timeout

* Fix a bug

* bug fix

* Fix formatting

* Fix ES5 compat

* capitalize comments

* more fixes

* Refactor tiddlywek/sse-server.js

* Extract helper functions for handling wikis and connections.
* Replace JSDoc comments.
* Fix formatting according to TW core.
* Simplify the logic for adding and removing connections.

* Fix formatting of tiddlyweb/sse-client.js

Fix formatting according to TW core.

* Fix formatting of server-sent-events.js

Fix formatting and comments following TW core guidelines.

* Extract a debounce function in sse-client.js

* Avoid using startsWith in server-sent-events.js

startsWith is part of ES2015, while TiddlyWiki uses the 5.1 dialect.

* New sse-enabled WebServer parameter

* If not set to "yes", disabled SSE request handling.
* Add documentation for the parameter in core/language/en-GB/Help/listen.tid
* Add new tiddler editions/tw5.com/tiddlers/webserver/WebServer Parameter_ sse-enabled.tid

* Disable polling for changes if SSE is enabled

* Add sse_enabled to /status JSON response
* Store syncer polling status in $:/config/SyncDisablePolling
* Handled disabling polling in core/modules/syncer.js

* Simply boolean logic in syncer.js

* Delete trailing whitespaces in syncer.js

Co-authored-by: Arlen22 <arlenbee@gmail.com>
2021-01-15 10:37:55 +00:00

54 lines
1.3 KiB
JavaScript

/*\
title: $:/plugins/tiddlywiki/tiddlyweb/sse-client.js
type: application/javascript
module-type: startup
GET /recipes/default/tiddlers/:title
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
exports.name = "/events/plugins/tiddlywiki/tiddlyweb";
exports.after = ["startup"];
exports.synchronous = true;
exports.platforms = ["browser"];
exports.startup = function() {
// Make sure we're actually being used
if($tw.syncadaptor.name !== "tiddlyweb") {
return;
}
// Get the mount point in case a path prefix is used
var host = $tw.syncadaptor.getHost();
// Make sure it ends with a slash (it usually does)
if(host[host.length - 1] !== "/") {
host += "/";
}
// Setup the event listener
setupEvents(host);
};
function debounce(callback) {
var timeout = null;
return function() {
clearTimeout(timeout);
timeout = setTimeout(callback,$tw.syncer.throttleInterval);
};
}
function setupEvents(host) {
var events = new EventSource(host + "events/plugins/tiddlywiki/tiddlyweb");
var debouncedSync = debounce($tw.syncer.syncFromServer.bind($tw.syncer));
events.addEventListener("change",debouncedSync);
events.onerror = function() {
events.close();
setTimeout(function() {
setupEvents(host);
},$tw.syncer.errorRetryInterval);
};
}
})();