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gildas
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go-plugins-demo
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Websockets for auto-reloading of the image

Gildas Chabot 8 years ago
parent
014db433e7
commit
c741deca92
3 changed files with 47 additions and 1 deletions
Split View Show Diff Stats
  1. 1 1
      buildAndRun.sh
  2. 35 0
      index.html
  3. 11 0
      main.go

+ 1 - 1
buildAndRun.sh
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@@ -18,7 +18,7 @@ mv -f `find $pluginSrc -name '*.so'` plugins.available/
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 # Compile main app
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-docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.8 go build
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+docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.8 /bin/bash -c "go get golang.org/x/net/websocket && go build"
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 # Run it
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+ 35 - 0
index.html
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@@ -0,0 +1,35 @@
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+<!DOCTYPE HTML>
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+<html>
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+    <head>
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+	    <title>GildasCh</title>
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+	    <meta charset='utf-8' />
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+        <style>
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+         body {
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+             background-color:#263238;
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+         }
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+         img {
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+             position: absolute;
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+             top: 50%;
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+             left: 50%;
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+             width: 425px;
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+             height: 224px;
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+             margin-left: -212px; /* Half the width */
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+             margin-top: -112px; /* Half the height */
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+         }
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+        </style>
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+    </head>
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+    <body>
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+
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+        <img id='image' style='-webkit-user-select: none' src='http://localhost:8080/a.jpg' />
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+
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+        <script>
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+         var connection = new WebSocket('ws://localhost:8080/ws', []);
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+         var counter = 0;
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+         connection.onmessage = function (e) {
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+           document.getElementById('image').src='http://localhost:8080/a.jpg?'+counter;
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+           console.log('Server: ' + e.data);
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+           counter++;
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+         };
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+        </script>
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+    </body>
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+</html>

+ 11 - 0
main.go
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@@ -10,6 +10,9 @@ import (
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 	"os"
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 	"path"
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 	"plugin"
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+	"time"
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+
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+	"golang.org/x/net/websocket"
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 )
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 type Transformer struct {
 
@@ -95,11 +98,19 @@ func handler(w http.ResponseWriter, r *http.Request) {
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 	jpeg.Encode(w, i, nil)
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 }
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+func wsHandler(ws *websocket.Conn) {
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+	for true {
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+		fmt.Fprintf(ws, "echp")
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+		time.Sleep(200 * time.Millisecond)
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+	}
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+}
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+
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 var pluginDir string
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 func main() {
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 	pluginDir = os.Args[1]
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 	http.HandleFunc("/a.jpg", handler)
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+	http.Handle("/ws", websocket.Handler(wsHandler))
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 	http.ListenAndServe(":8080", nil)
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 }