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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,8 @@ | ||
| { | ||
| "routes": [{ "src": "/(.*)", "dest": "/api" }] | ||
| "routes": [{ "src": "/(.*)", "dest": "/api" }], | ||
| "functions": { | ||
| "api/index.go": { | ||
| "maxDuration": "30" | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -32,6 +32,7 @@ templ Wrapper(title string, className ...string) { | |
| /> | ||
| <script src="https://unpkg.com/[email protected]"></script> | ||
| <script src="https://unpkg.com/[email protected]/dist/ext/class-tools.js"></script> | ||
| <script src="https://unpkg.com/[email protected]/dist/ext/sse.js"></script> | ||
| <link | ||
| rel="stylesheet" | ||
| href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.classless.min.css" | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| package chatroom | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "slices" | ||
| ) | ||
|
|
||
| const EndEvent = "end" | ||
| const ChatEvent = "chat" | ||
|
|
||
| type Chat struct { | ||
| Message string | ||
| } | ||
|
|
||
| type Chatroom struct { | ||
| source chan Chat | ||
| listeners []chan Chat | ||
| addListener chan chan Chat | ||
| removeListener chan (<-chan Chat) | ||
| } | ||
|
|
||
| func New(ctx context.Context) *Chatroom { | ||
| c := &Chatroom{ | ||
| source: make(chan Chat), | ||
| listeners: []chan Chat{}, | ||
| addListener: make(chan chan Chat), | ||
| removeListener: make(chan (<-chan Chat)), | ||
| } | ||
|
|
||
| go c.run(ctx) | ||
|
|
||
| return c | ||
| } | ||
|
|
||
| func (c *Chatroom) Join() <-chan Chat { | ||
| newListener := make(chan Chat) | ||
| c.addListener <- newListener | ||
| return newListener | ||
| } | ||
|
|
||
| func (c *Chatroom) Leave(channel <-chan Chat) { | ||
| fmt.Println("removing listener") | ||
| c.removeListener <- channel | ||
| } | ||
|
|
||
| func (c *Chatroom) Send(message string) { | ||
| c.source <- Chat{Message: message} | ||
| } | ||
|
|
||
| func (c *Chatroom) run(ctx context.Context) { | ||
| defer func() { | ||
| for _, listener := range c.listeners { | ||
| if listener != nil { | ||
| close(listener) | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| fmt.Println("closing chatroom") | ||
| return | ||
| case newListener := <-c.addListener: | ||
| c.listeners = append(c.listeners, newListener) | ||
| case toRemove := <-c.removeListener: | ||
| c.listeners = slices.DeleteFunc(c.listeners, func(l chan Chat) bool { | ||
| if l == toRemove { | ||
| fmt.Println("removed listener") | ||
| return true | ||
| } | ||
| return false | ||
| }) | ||
| case chat, ok := <-c.source: | ||
| if !ok { | ||
| return | ||
| } | ||
| for _, listener := range c.listeners { | ||
| listener <- chat | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package extempl | ||
|
|
||
| import ( | ||
| "embed" | ||
|
|
||
| "github.com/will-wow/typed-htmx-go/examples/web/layout/templ/layout" | ||
| "github.com/will-wow/typed-htmx-go/examples/web/exprint" | ||
| "github.com/will-wow/typed-htmx-go/htmx/ext/sse" | ||
| "github.com/will-wow/typed-htmx-go/htmx" | ||
| "github.com/will-wow/typed-htmx-go/htmx/swap" | ||
| "github.com/will-wow/typed-htmx-go/examples/web/sse_ex/chatroom" | ||
| "github.com/will-wow/typed-htmx-go/htmx/on" | ||
| ) | ||
|
|
||
| var hx = htmx.NewTempl() | ||
|
|
||
| //go:embed sse.templ | ||
| var fs embed.FS | ||
| var ex = exprint.New(fs, "//", "") | ||
|
|
||
| templ Page() { | ||
| @layout.Wrapper("Server-Side Events") { | ||
| <h1>Server-Side Events</h1> | ||
| <p> | ||
| A demo of Server-Side Events using htmx and typed-htmx-go. | ||
| </p> | ||
| <p> | ||
| When you click the button below, that fetches a new element that uses the sse extension to start a live feed. | ||
| </p> | ||
| <pre> | ||
| <code class="language-go"> | ||
| { ex.PrintOrErr("sse.templ", "entry") } | ||
| </code> | ||
| </pre> | ||
| <p> | ||
| The new elements uses the sse.Connect attribute to connect to a server-side event stream, and allows you to POST messages to the stream. | ||
| </p> | ||
| <pre> | ||
| <code class="language-go"> | ||
| { ex.PrintOrErr("sse.templ", "chatroom") } | ||
| </code> | ||
| </pre> | ||
| <p> | ||
| When you or another user posts a message, it will be sent to the server and broadcast to all connected clients as a simple div. | ||
| </p> | ||
| <pre> | ||
| <code class="language-go"> | ||
| { ex.PrintOrErr("sse.templ", "message") } | ||
| </code> | ||
| </pre> | ||
| <p> | ||
| After 25 seconds, the server will send the EndEvent, that closes removes the sse connection by replacing the sse.Connect element with the initial button using <code>hx.Swap(swap.OuterHTML)</code>. | ||
| </p> | ||
| <h2>Demo</h2> | ||
| @Entry() | ||
| } | ||
| } | ||
|
|
||
| templ Entry() { | ||
| //ex:start:entry | ||
| <button | ||
| { hx.Get("/examples/templ/sse/chatroom/")... } | ||
| { hx.Target(htmx.TargetThis)... } | ||
| { hx.Swap(swap.OuterHTML)... } | ||
| > | ||
| Enter Chat | ||
| </button> | ||
| //ex:end:entry | ||
| } | ||
|
|
||
| templ Chatroom() { | ||
| //ex:start:chatroom | ||
| <div | ||
| { hx.Ext(sse.Extension)... } | ||
| { sse.Connect(hx, "/examples/templ/sse/chatroom/feed/")... } | ||
| { sse.Swap(hx, chatroom.EndEvent)... } | ||
| { hx.Swap(swap.OuterHTML)... } | ||
| > | ||
| <form | ||
| id="form" | ||
| method="POST" | ||
| action="/examples/templ/sse/chatroom/post/" | ||
| { hx.On(on.AfterRequest, "this.querySelector('#message').value = ''")... } | ||
| > | ||
| <label> | ||
| Send a message | ||
| <input | ||
| id="message" | ||
| type="text" | ||
| name="message" | ||
| /> | ||
| </label> | ||
| <button type="submit">Send</button> | ||
| </form> | ||
| <div | ||
| { sse.Swap(hx, chatroom.ChatEvent)... } | ||
| { hx.Swap(swap.BeforeEnd)... } | ||
| ></div> | ||
| </div> | ||
| //ex:end:chatroom | ||
| } | ||
|
|
||
| //ex:start:message | ||
| templ ChatMessage(msg string) { | ||
| <div>{ msg }</div> | ||
| } | ||
|
|
||
| //ex:end:message |
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