+sse test

sse/be/go.mod

@@ -0,0 +1,37 @@
+module be
+
+go 1.21.4
+
+require (
+	github.com/gin-contrib/cors v1.5.0
+	github.com/gin-gonic/gin v1.9.1
+)
+
+require (
+	github.com/bytedance/sonic v1.10.1 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d // indirect
+	github.com/chenzhuoyu/iasm v0.9.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.15.5 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.5 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/leodido/go-urn v1.2.4 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.11 // indirect
+	golang.org/x/arch v0.5.0 // indirect
+	golang.org/x/crypto v0.14.0 // indirect
+	golang.org/x/net v0.16.0 // indirect
+	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

sse/be/go.sum

@@ -0,0 +1,102 @@
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sse/be/main.go

@@ -0,0 +1,175 @@
+package main
+
+import (
+	"encoding/json"
+	"io"
+	"strconv"
+
+	"github.com/gin-contrib/cors"
+	"github.com/gin-gonic/gin"
+)
+
+type Message struct {
+	Event string `json:"event"`
+	Data  string `json:"data"`
+	Id    string `json:"id"`
+}
+
+type Event struct {
+	Message      chan Message
+	NewClient    chan chan string
+	ClosedClient chan chan string
+	TotalClients map[chan string]bool
+}
+
+type ClientChan chan string
+
+func main() {
+
+	r := gin.Default()
+	r.Use(cors.Default())
+
+	event := NewServer()
+
+	api := r.Group("/api")
+	api.GET("/sse", HeadersMiddleware(), event.serveHTTP(), event.retvalSSE())
+	api.GET("/msg", event.SendNewMsg())
+	api.GET("/ping", event.SendPing())
+	api.GET("/pong", event.SendPong())
+
+	sse := r.Group("/sse")
+	sse.Static("/", "./static/sse")
+
+	app := r.Group("/_app")
+	app.Static("/", "./static/_app")
+
+	static := r.Group("/static")
+	static.Static("/", "./static/static")
+
+	r.StaticFile("/", "./static/index.html")
+	r.StaticFile("/favicon.png", "./static/favicon.png")
+
+	r.ForwardedByClientIP = true
+	r.SetTrustedProxies([]string{"127.0.0.1"})
+
+	r.Run(":8888")
+}
+
+func NewServer() *Event {
+	event := &Event{
+		Message:      make(chan Message),
+		NewClient:    make(chan chan string),
+		ClosedClient: make(chan chan string),
+		TotalClients: make(map[chan string]bool),
+	}
+
+	go event.Broadcast()
+
+	return event
+}
+
+func HeadersMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		headers := c.Writer.Header()
+		headers.Set("Content-Type", "text/event-stream")
+		headers.Set("Cache-Control", "no-cache")
+		headers.Set("Connection", "keep-alive")
+		headers.Set("Transfer-Encoding", "chunked")
+		c.Next()
+	}
+}
+
+func (e *Event) serveHTTP() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// Initialize client channel
+		clientChan := make(ClientChan)
+
+		// Send new connection to event server
+		e.NewClient <- clientChan
+
+		defer func() {
+			// Send closed connection to event server
+			e.ClosedClient <- clientChan
+		}()
+
+		c.Set("clientChan", clientChan)
+
+		c.Next()
+	}
+}
+
+func (e *Event) retvalSSE() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		v, ok := c.Get("clientChan")
+		if !ok {
+			return
+		}
+
+		clientChan, ok := v.(ClientChan)
+		if !ok {
+			return
+		}
+
+		c.Stream(func(w io.Writer) bool {
+			msg, ok := <-clientChan
+			if ok {
+				c.SSEvent("message", msg)
+			}
+			return ok
+		})
+	}
+}
+
+func (e *Event) Broadcast() {
+	id := 0
+	for {
+		select {
+		case client := <-e.NewClient:
+			e.TotalClients[client] = true
+		case client := <-e.ClosedClient:
+			delete(e.TotalClients, client)
+			close(client)
+		case message := <-e.Message:
+			id++
+			message.Id = strconv.Itoa(id)
+			for client := range e.TotalClients {
+				msg, _ := json.Marshal(message)
+				client <- string(msg)
+			}
+		}
+	}
+}
+
+func (e *Event) SendNewMsg() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		e.SendMsg(Message{
+			Event: "message",
+			Data:  "hello",
+			Id:    "1",
+		})
+	}
+}
+
+func (e *Event) SendPing() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		e.SendMsg(Message{
+			Event: "ping",
+			Data:  "hello",
+			Id:    "1",
+		})
+	}
+}
+
+func (e *Event) SendPong() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		e.SendMsg(Message{
+			Event: "pong",
+			Data:  "hello",
+			Id:    "1",
+		})
+	}
+}
+
+func (e *Event) SendMsg(msg Message) {
+	e.Message <- msg
+}

sse/be/static/_app/env.js

@@ -0,0 +1 @@
+export const env={}

sse/be/static/_app/env.js.br

@@ -0,0 +1 @@
+	€export const env={}

sse/be/static/_app/immutable/chunks/scheduler.k-kUyWhY.js

@@ -0,0 +1 @@
+function k(){}function x(t,n){for(const e in n)t[e]=n[e];return t}function w(t){return t()}function z(){return Object.create(null)}function j(t){t.forEach(w)}function F(t){return typeof t=="function"}function P(t,n){return t!=t?n==n:t!==n||t&&typeof t=="object"||typeof t=="function"}function S(t){return Object.keys(t).length===0}function E(t,...n){if(t==null){for(const o of n)o(void 0);return k}const e=t.subscribe(...n);return e.unsubscribe?()=>e.unsubscribe():e}function U(t,n,e){t.$$.on_destroy.push(E(n,e))}function A(t,n,e,o){if(t){const r=g(t,n,e,o);return t[0](r)}}function g(t,n,e,o){return t[1]&&o?x(e.ctx.slice(),t[1](o(n))):e.ctx}function B(t,n,e,o){if(t[2]&&o){const r=t[2](o(e));if(n.dirty===void 0)return r;if(typeof r=="object"){const a=[],f=Math.max(n.dirty.length,r.length);for(let s=0;s<f;s+=1)a[s]=n.dirty[s]|r[s];return a}return n.dirty|r}return n.dirty}function C(t,n,e,o,r,a){if(r){const f=g(n,e,o,a);t.p(f,r)}}function D(t){if(t.ctx.length>32){const n=[],e=t.ctx.length/32;for(let o=0;o<e;o++)n[o]=-1;return n}return-1}let i;function d(t){i=t}function m(){if(!i)throw new Error("Function called outside component initialization");return i}function G(t){m().$$.on_mount.push(t)}function H(t){m().$$.after_update.push(t)}const l=[],p=[];let u=[];const b=[],y=Promise.resolve();let h=!1;function v(){h||(h=!0,y.then(q))}function I(){return v(),y}function O(t){u.push(t)}const _=new Set;let c=0;function q(){if(c!==0)return;const t=i;do{try{for(;c<l.length;){const n=l[c];c++,d(n),M(n.$$)}}catch(n){throw l.length=0,c=0,n}for(d(null),l.length=0,c=0;p.length;)p.pop()();for(let n=0;n<u.length;n+=1){const e=u[n];_.has(e)||(_.add(e),e())}u.length=0}while(l.length);for(;b.length;)b.pop()();h=!1,_.clear(),d(t)}function M(t){if(t.fragment!==null){t.update(),j(t.before_update);const n=t.dirty;t.dirty=[-1],t.fragment&&t.fragment.p(t.ctx,n),t.after_update.forEach(O)}}function J(t){const n=[],e=[];u.forEach(o=>t.indexOf(o)===-1?n.push(o):e.push(o)),e.forEach(o=>o()),u=n}export{H as a,p as b,A as c,B as d,U as e,z as f,D as g,q as h,F as i,S as j,O as k,J as l,i as m,k as n,G as o,d as p,w as q,j as r,P as s,I as t,C as u,l as v,v as w};

sse/be/static/_app/immutable/chunks/scheduler.k-kUyWhY.js.br

@@ -0,0 +1,4 @@
+o <20>Βqο!6¥mƒ‘ΥL­ZlοΝ―Pκ„V<E2809E>
+#( '<27>EΫΪY6ή]™\η“6w<36>΄ώp4uφΣιΗv 4Ζ eΦε»ΖP<CE96>ύμ'*uΤΕΦ¥Ή-n.ΐΉKA“’(|\ΆUΫΝ?<3F>a<EFBFBD>V<EFBFBD>σ
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ψ†„H)!γ
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<01>Πά‚α,«¦£s?BD®…

sse/be/static/_app/immutable/chunks/singletons.4aHkxUVP.js

@@ -0,0 +1 @@
+import{n as d,s as k}from"./scheduler.k-kUyWhY.js";const u=[];function p(t,e=d){let n;const o=new Set;function a(s){if(k(t,s)&&(t=s,n)){const c=!u.length;for(const i of o)i[1](),u.push(i,t);if(c){for(let i=0;i<u.length;i+=2)u[i][0](u[i+1]);u.length=0}}}function l(s){a(s(t))}function r(s,c=d){const i=[s,c];return o.add(i),o.size===1&&(n=e(a,l)||d),s(t),()=>{o.delete(i),o.size===0&&n&&(n(),n=null)}}return{set:a,update:l,subscribe:r}}const m=globalThis.__sveltekit_1omqn18?.base??"",E=globalThis.__sveltekit_1omqn18?.assets??m,A="1703001309124",I="sveltekit:snapshot",w="sveltekit:scroll",y="sveltekit:states",N="sveltekit:pageurl",U="sveltekit:history",L="sveltekit:navigation",_={tap:1,hover:2,viewport:3,eager:4,off:-1,false:-1},g=location.origin;function O(t){if(t instanceof URL)return t;let e=document.baseURI;if(!e){const n=document.getElementsByTagName("base");e=n.length?n[0].href:document.URL}return new URL(t,e)}function Y(){return{x:pageXOffset,y:pageYOffset}}function f(t,e){return t.getAttribute(`data-sveltekit-${e}`)}const b={..._,"":_.hover};function v(t){let e=t.assignedSlot??t.parentNode;return e?.nodeType===11&&(e=e.host),e}function q(t,e){for(;t&&t!==e;){if(t.nodeName.toUpperCase()==="A"&&t.hasAttribute("href"))return t;t=v(t)}}function x(t,e){let n;try{n=new URL(t instanceof SVGAElement?t.href.baseVal:t.href,document.baseURI)}catch{}const o=t instanceof SVGAElement?t.target.baseVal:t.target,a=!n||!!o||T(n,e)||(t.getAttribute("rel")||"").split(/\s+/).includes("external"),l=n?.origin===g&&t.hasAttribute("download");return{url:n,external:a,target:o,download:l}}function P(t){let e=null,n=null,o=null,a=null,l=null,r=null,s=t;for(;s&&s!==document.documentElement;)o===null&&(o=f(s,"preload-code")),a===null&&(a=f(s,"preload-data")),e===null&&(e=f(s,"keepfocus")),n===null&&(n=f(s,"noscroll")),l===null&&(l=f(s,"reload")),r===null&&(r=f(s,"replacestate")),s=v(s);function c(i){switch(i){case"":case"true":return!0;case"off":case"false":return!1;default:return}}return{preload_code:b[o??"off"],preload_data:b[a??"off"],keepfocus:c(e),noscroll:c(n),reload:c(l),replace_state:c(r)}}function h(t){const e=p(t);let n=!0;function o(){n=!0,e.update(r=>r)}function a(r){n=!1,e.set(r)}function l(r){let s;return e.subscribe(c=>{(s===void 0||n&&c!==s)&&r(s=c)})}return{notify:o,set:a,subscribe:l}}function R(){const{set:t,subscribe:e}=p(!1);let n;async function o(){clearTimeout(n);try{const a=await fetch(`${E}/_app/version.json`,{headers:{pragma:"no-cache","cache-control":"no-cache"}});if(!a.ok)return!1;const r=(await a.json()).version!==A;return r&&(t(!0),clearTimeout(n)),r}catch{return!1}}return{subscribe:e,check:o}}function T(t,e){return t.origin!==g||!t.pathname.startsWith(e)}function V(t){t.client}const G={url:h({}),page:h({}),navigating:p(null),updated:R()};export{U as H,L as N,N as P,w as S,y as a,I as b,P as c,G as d,m as e,q as f,x as g,_ as h,T as i,V as j,g as o,O as r,Y as s};

sse/be/static/_app/immutable/nodes/0.JKa0J41q.js

@@ -0,0 +1 @@
+import{s as l,c as r,u as i,g as u,d as f}from"../chunks/scheduler.k-kUyWhY.js";import{S as _,i as c,d as p,t as d}from"../chunks/index.PctGSwCt.js";const m=!0,g=!1,$="always",v=Object.freeze(Object.defineProperty({__proto__:null,prerender:m,ssr:g,trailingSlash:$},Symbol.toStringTag,{value:"Module"}));function y(n){let s;const a=n[1].default,e=r(a,n,n[0],null);return{c(){e&&e.c()},l(t){e&&e.l(t)},m(t,o){e&&e.m(t,o),s=!0},p(t,[o]){e&&e.p&&(!s||o&1)&&i(e,a,t,t[0],s?f(a,t[0],o,null):u(t[0]),null)},i(t){s||(p(e,t),s=!0)},o(t){d(e,t),s=!1},d(t){e&&e.d(t)}}}function S(n,s,a){let{$$slots:e={},$$scope:t}=s;return n.$$set=o=>{"$$scope"in o&&a(0,t=o.$$scope)},[t,e]}class j extends _{constructor(s){super(),c(this,s,S,y,l,{})}}export{j as component,v as universal};

sse/be/static/_app/immutable/nodes/1.Veb9jVKm.js

@@ -0,0 +1 @@
+import{s as E,n as b,e as x}from"../chunks/scheduler.k-kUyWhY.js";import{S,i as j,g as _,m as f,s as q,h as d,j as g,n as h,f as p,c as y,a as l,x as v,o as $}from"../chunks/index.PctGSwCt.js";import{d as C}from"../chunks/singletons.4aHkxUVP.js";const H=()=>{const s=C;return{page:{subscribe:s.page.subscribe},navigating:{subscribe:s.navigating.subscribe},updated:s.updated}},P={subscribe(s){return H().page.subscribe(s)}};function k(s){let t,r=s[0].status+"",o,n,i,c=s[0].error?.message+"",u;return{c(){t=_("h1"),o=f(r),n=q(),i=_("p"),u=f(c)},l(e){t=d(e,"H1",{});var a=g(t);o=h(a,r),a.forEach(p),n=y(e),i=d(e,"P",{});var m=g(i);u=h(m,c),m.forEach(p)},m(e,a){l(e,t,a),v(t,o),l(e,n,a),l(e,i,a),v(i,u)},p(e,[a]){a&1&&r!==(r=e[0].status+"")&&$(o,r),a&1&&c!==(c=e[0].error?.message+"")&&$(u,c)},i:b,o:b,d(e){e&&(p(t),p(n),p(i))}}}function w(s,t,r){let o;return x(s,P,n=>r(0,o=n)),[o]}let D=class extends S{constructor(t){super(),j(this,t,w,k,E,{})}};export{D as component};

sse/be/static/_app/immutable/nodes/2.W8D06jmS.js

@@ -0,0 +1 @@
+import{s as d,n as l}from"../chunks/scheduler.k-kUyWhY.js";import{S as h,i as u,g as m,s as _,h as p,y as v,c as x,a as i,f as o}from"../chunks/index.PctGSwCt.js";function C(f){let t,r="Welcome to SvelteKit",a,s,c='Visit <a href="https://kit.svelte.dev">kit.svelte.dev</a> to read the documentation';return{c(){t=m("h1"),t.textContent=r,a=_(),s=m("p"),s.innerHTML=c},l(e){t=p(e,"H1",{"data-svelte-h":!0}),v(t)!=="svelte-yyjjjs"&&(t.textContent=r),a=x(e),s=p(e,"P",{"data-svelte-h":!0}),v(s)!=="svelte-jl9sbz"&&(s.innerHTML=c)},m(e,n){i(e,t,n),i(e,a,n),i(e,s,n)},p:l,i:l,o:l,d(e){e&&(o(t),o(a),o(s))}}}class H extends h{constructor(t){super(),u(this,t,null,C,d,{})}}export{H as component};

sse/be/static/_app/immutable/nodes/3.79qhDZ-Z.js

@@ -0,0 +1 @@
+import{s as N,n as y,r as O,o as D}from"../chunks/scheduler.k-kUyWhY.js";import{S as E,i as T,g as m,m as k,s as x,h as w,j as z,n as B,f as u,c as b,y as C,a as g,x as J,z as h,o as L}from"../chunks/index.PctGSwCt.js";function M(p){let c,s,n,i,o="send Msg",t,l,S="send Ping",d,r,v="send Pong",_,$;return{c(){c=m("h1"),s=k(p[0]),n=x(),i=m("button"),i.textContent=o,t=x(),l=m("button"),l.textContent=S,d=x(),r=m("button"),r.textContent=v},l(e){c=w(e,"H1",{});var a=z(c);s=B(a,p[0]),a.forEach(u),n=b(e),i=w(e,"BUTTON",{"data-svelte-h":!0}),C(i)!=="svelte-1a1zt14"&&(i.textContent=o),t=b(e),l=w(e,"BUTTON",{"data-svelte-h":!0}),C(l)!=="svelte-iklzn2"&&(l.textContent=S),d=b(e),r=w(e,"BUTTON",{"data-svelte-h":!0}),C(r)!=="svelte-1i1hqj6"&&(r.textContent=v)},m(e,a){g(e,c,a),J(c,s),g(e,n,a),g(e,i,a),g(e,t,a),g(e,l,a),g(e,d,a),g(e,r,a),_||($=[h(i,"click",P),h(l,"click",U),h(r,"click",j)],_=!0)},p(e,[a]){a&1&&L(s,e[0])},i:y,o:y,d(e){e&&(u(c),u(n),u(i),u(t),u(l),u(d),u(r)),_=!1,O($)}}}function f(){return new Date(Date.now()).toISOString()}async function P(){await fetch("/api/msg")}async function U(){await fetch("/api/ping")}async function j(){await fetch("/api/pong")}function q(p,c,s){let n;function i(){const o=new EventSource("/api/sse");return console.log("subscribe"),o.onopen=()=>{console.log(`sse open ${f()}`),s(0,n=`sse open ${f()}`)},o.onerror=()=>{console.log(`sse error ${f()}`),o.readyState===EventSource.CONNECTING&&console.log(`sse reconnecting ${f()}`),s(0,n=`sse error ${f()}`)},o.onmessage=t=>{let l=JSON.parse(t.data);console.log(`received: ${JSON.stringify(l)}`),s(0,n=`received: ${JSON.stringify(l)} ${Date.now()}`)},o.addEventListener("ping",t=>{console.log(`ping: ${t.data}`),s(0,n=`ping: ${t.data} ${Date.now()}`)}),o.addEventListener("pong",t=>{console.log(`pong: ${t.data}`),s(0,n=`pong: ${t.data} ${Date.now()}`)}),o.addEventListener("message",t=>{console.log(`message: ${t.data}`),s(0,n=`message: ${t.data} ${Date.now()}`)}),()=>{o.close(),console.log(`sse closing ${Date.now()}`)}}return D(()=>i()),s(0,n=""),[n]}class H extends E{constructor(c){super(),T(this,c,q,M,N,{})}}export{H as component};

sse/be/static/_app/version.json

@@ -0,0 +1 @@
+{"version":"1703001309124"}

sse/be/static/index.html

@@ -0,0 +1,35 @@
+<!doctype html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8" />
+		<link rel="icon" href="/favicon.png" />
+		<meta name="viewport" content="width=device-width, initial-scale=1" />
+		
+		<link rel="modulepreload" href="/_app/immutable/entry/start.PsjcEp4p.js">
+		<link rel="modulepreload" href="/_app/immutable/chunks/scheduler.k-kUyWhY.js">
+		<link rel="modulepreload" href="/_app/immutable/chunks/singletons.4aHkxUVP.js">
+		<link rel="modulepreload" href="/_app/immutable/entry/app.zLHOYlGu.js">
+		<link rel="modulepreload" href="/_app/immutable/chunks/index.PctGSwCt.js">
+	</head>
+	<body data-sveltekit-preload-data="hover">
+		<div style="display: contents">
+			<script>
+				{
+					__sveltekit_1omqn18 = {
+						base: "",
+						env: null
+					};
+
+					const element = document.currentScript.parentElement;
+
+					Promise.all([
+						import("/_app/immutable/entry/start.PsjcEp4p.js"),
+						import("/_app/immutable/entry/app.zLHOYlGu.js")
+					]).then(([kit, app]) => {
+						kit.start(app, element);
+					});
+				}
+			</script>
+		</div>
+	</body>
+</html>

sse/be/static/sse/index.html

@@ -0,0 +1,35 @@
+<!doctype html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8" />
+		<link rel="icon" href="../favicon.png" />
+		<meta name="viewport" content="width=device-width, initial-scale=1" />
+		
+		<link rel="modulepreload" href="../_app/immutable/entry/start.PsjcEp4p.js">
+		<link rel="modulepreload" href="../_app/immutable/chunks/scheduler.k-kUyWhY.js">
+		<link rel="modulepreload" href="../_app/immutable/chunks/singletons.4aHkxUVP.js">
+		<link rel="modulepreload" href="../_app/immutable/entry/app.zLHOYlGu.js">
+		<link rel="modulepreload" href="../_app/immutable/chunks/index.PctGSwCt.js">
+	</head>
+	<body data-sveltekit-preload-data="hover">
+		<div style="display: contents">
+			<script>
+				{
+					__sveltekit_1omqn18 = {
+						base: new URL("..", location).pathname.slice(0, -1),
+						env: null
+					};
+
+					const element = document.currentScript.parentElement;
+
+					Promise.all([
+						import("../_app/immutable/entry/start.PsjcEp4p.js"),
+						import("../_app/immutable/entry/app.zLHOYlGu.js")
+					]).then(([kit, app]) => {
+						kit.start(app, element);
+					});
+				}
+			</script>
+		</div>
+	</body>
+</html>

sse/fe/.eslintignore

@@ -0,0 +1,13 @@
+.DS_Store
+node_modules
+/build
+/.svelte-kit
+/package
+.env
+.env.*
+!.env.example
+
+# Ignore files for PNPM, NPM and YARN
+pnpm-lock.yaml
+package-lock.json
+yarn.lock

sse/fe/.eslintrc.cjs

@@ -0,0 +1,15 @@
+/** @type { import("eslint").Linter.FlatConfig } */
+module.exports = {
+	root: true,
+	extends: ['eslint:recommended', 'plugin:svelte/recommended', 'prettier'],
+	parserOptions: {
+		sourceType: 'module',
+		ecmaVersion: 2020,
+		extraFileExtensions: ['.svelte']
+	},
+	env: {
+		browser: true,
+		es2017: true,
+		node: true
+	}
+};

sse/fe/.gitignore

@@ -0,0 +1,10 @@
+.DS_Store
+node_modules
+/build
+/.svelte-kit
+/package
+.env
+.env.*
+!.env.example
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*

sse/fe/.npmrc

@@ -0,0 +1 @@
+engine-strict=true

sse/fe/.prettierignore

@@ -0,0 +1,4 @@
+# Ignore files for PNPM, NPM and YARN
+pnpm-lock.yaml
+package-lock.json
+yarn.lock

sse/fe/.prettierrc

@@ -0,0 +1,8 @@
+{
+	"useTabs": true,
+	"singleQuote": true,
+	"trailingComma": "none",
+	"printWidth": 100,
+	"plugins": ["prettier-plugin-svelte"],
+	"overrides": [{ "files": "*.svelte", "options": { "parser": "svelte" } }]
+}

sse/fe/README.md

@@ -0,0 +1,38 @@
+# create-svelte
+
+Everything you need to build a Svelte project, powered by [`create-svelte`](https://github.com/sveltejs/kit/tree/master/packages/create-svelte).
+
+## Creating a project
+
+If you're seeing this, you've probably already done this step. Congrats!
+
+```bash
+# create a new project in the current directory
+npm create svelte@latest
+
+# create a new project in my-app
+npm create svelte@latest my-app
+```
+
+## Developing
+
+Once you've created a project and installed dependencies with `npm install` (or `pnpm install` or `yarn`), start a development server:
+
+```bash
+npm run dev
+
+# or start the server and open the app in a new browser tab
+npm run dev -- --open
+```
+
+## Building
+
+To create a production version of your app:
+
+```bash
+npm run build
+```
+
+You can preview the production build with `npm run preview`.
+
+> To deploy your app, you may need to install an [adapter](https://kit.svelte.dev/docs/adapters) for your target environment.

sse/fe/package.json

@@ -0,0 +1,26 @@
+{
+	"name": "fe",
+	"version": "0.0.1",
+	"private": true,
+	"scripts": {
+		"dev": "vite dev --host",
+		"build": "vite build",
+		"preview": "vite preview",
+		"lint": "prettier --check . && eslint .",
+		"format": "prettier --write ."
+	},
+	"devDependencies": {
+		"@sveltejs/adapter-auto": "^3.0.0",
+		"@sveltejs/adapter-static": "^3.0.0",
+		"@sveltejs/kit": "^2.0.3",
+		"@sveltejs/vite-plugin-svelte": "^3.0.1",
+		"eslint": "^8.56.0",
+		"eslint-config-prettier": "^9.1.0",
+		"eslint-plugin-svelte": "^2.35.1",
+		"prettier": "^3.1.1",
+		"prettier-plugin-svelte": "^3.1.2",
+		"svelte": "^4.2.8",
+		"vite": "^5.0.10"
+	},
+	"type": "module"
+}

sse/fe/src/app.html

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+<!doctype html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8" />
+		<link rel="icon" href="%sveltekit.assets%/favicon.png" />
+		<meta name="viewport" content="width=device-width, initial-scale=1" />
+		%sveltekit.head%
+	</head>
+	<body data-sveltekit-preload-data="hover">
+		<div style="display: contents">%sveltekit.body%</div>
+	</body>
+</html>

sse/fe/src/lib/index.js

@@ -0,0 +1 @@
+// place files you want to import through the `$lib` alias in this folder.

sse/fe/src/routes/+layout.js

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+export const prerender = true;
+export const ssr = false;
+export const trailingSlash = 'always';

sse/fe/src/routes/+page.svelte

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+<h1>Welcome to SvelteKit</h1>
+<p>Visit <a href="https://kit.svelte.dev">kit.svelte.dev</a> to read the documentation</p>

sse/fe/src/routes/sse/+page.svelte

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+<script>
+    import { onMount } from'svelte';
+
+    $: msg = "";
+
+    function now() {
+        const now = new Date(Date.now());
+
+        return now.toISOString();
+    }
+
+    function Subscribe() {
+		const sse = new EventSource(`/api/sse`);
+		console.log('subscribe');
+
+        sse.onopen = () => {
+            console.log(`sse open ${now()}`);
+            msg = `sse open ${now()}`;
+        };
+        
+        sse.onerror = () => {
+            console.log(`sse error ${now()}`);
+            if (sse.readyState === EventSource.CONNECTING) {
+                console.log(`sse reconnecting ${now()}`);                
+            }
+            msg = `sse error ${now()}`;
+        };
+
+		sse.onmessage = (e) => {
+			let Msg = JSON.parse(e.data);
+			console.log(`received: ${JSON.stringify(Msg)}`);
+            msg = `received: ${JSON.stringify(Msg)} ${Date.now()}`;
+		};
+        
+        sse.addEventListener('ping', (e) => {
+            console.log(`ping: ${e.data}`);
+            msg = `ping: ${e.data} ${Date.now()}`;
+        });
+        
+        sse.addEventListener('pong', (e) => {
+            console.log(`pong: ${e.data}`);
+            msg = `pong: ${e.data} ${Date.now()}`;
+        });
+        
+        sse.addEventListener('message', (e) => {
+            console.log(`message: ${e.data}`);
+            msg = `message: ${e.data} ${Date.now()}`;
+        })
+		
+        return () => {
+			sse.close();
+			console.log(`sse closing ${Date.now()}`);
+		};
+	}
+
+	onMount(() => {
+		const unsub = Subscribe();
+		return unsub;
+	});
+
+    async function newmsg() {
+        await fetch('/api/msg');
+    }
+
+    async function ping() {
+        await fetch('/api/ping');
+    }
+
+    async function pong() {
+        await fetch('/api/pong');
+    }
+
+
+</script>
+
+<h1>{msg}</h1>
+
+
+<button on:click={newmsg}>send Msg</button>
+<button on:click={ping}>send Ping</button>
+<button on:click={pong}>send Pong</button>

sse/fe/svelte.config.js

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+// import adapter from '@sveltejs/adapter-auto';
+import adapter from '@sveltejs/adapter-static';
+
+/** @type {import('@sveltejs/kit').Config} */
+const config = {
+	kit: {
+		// adapter-auto only supports some environments, see https://kit.svelte.dev/docs/adapter-auto for a list.
+		// If your environment is not supported or you settled on a specific environment, switch out the adapter.
+		// See https://kit.svelte.dev/docs/adapters for more information about adapters.
+		adapter: adapter({
+			pages: '../be/static',
+			assets: '../be/static',
+			fallback: 'index.html',
+			precompress: true,
+			strict: true
+		})
+	}
+};
+
+export default config;

sse/fe/vite.config.js

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+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+	plugins: [sveltekit()]
+});