kopia lustrzana https://github.com/miklobit/TiddlyWiki5
71 wiersze
1.9 KiB
JavaScript
71 wiersze
1.9 KiB
JavaScript
/*\
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title: $:/core/modules/server/server-sent-events.js
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type: application/javascript
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module-type: library
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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parameters:
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prefix - usually the plugin path, such as `plugins/tiddlywiki/tiddlyweb`. The
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route will match `/events/${prefix}` exactly.
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handler - a function that will be called each time a request comes in with the
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request and state from the route and an emit function to call.
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*/
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var ServerSentEvents = function ServerSentEvents(prefix, handler) {
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this.handler = handler;
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this.prefix = prefix;
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};
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ServerSentEvents.prototype.getExports = function() {
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return {
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bodyFormat: "stream",
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method: "GET",
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path: new RegExp("^/events/" + this.prefix + "$"),
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handler: this.handleEventRequest.bind(this)
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};
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};
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ServerSentEvents.prototype.handleEventRequest = function(request,response,state) {
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if(ServerSentEvents.prototype.isEventStreamRequest(request)) {
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response.writeHead(200, {
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"Content-Type": "text/event-stream",
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"Cache-Control": "no-cache",
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"Connection": "keep-alive"
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});
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this.handler(request,state,this.emit.bind(this,response),this.end.bind(this,response));
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} else {
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response.writeHead(406,"Not Acceptable",{});
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response.end();
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}
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};
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ServerSentEvents.prototype.isEventStreamRequest = function(request) {
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return request.headers.accept &&
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request.headers.accept.match(/^text\/event-stream/);
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};
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ServerSentEvents.prototype.emit = function(response,event,data) {
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if(typeof event !== "string" || event.indexOf("\n") !== -1) {
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throw new Error("Type must be a single-line string");
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}
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if(typeof data !== "string" || data.indexOf("\n") !== -1) {
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throw new Error("Data must be a single-line string");
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}
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response.write("event: " + event + "\ndata: " + data + "\n\n", "utf8");
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};
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ServerSentEvents.prototype.end = function(response) {
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response.end();
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};
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exports.ServerSentEvents = ServerSentEvents;
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})();
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