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51歳からのプログラミング 備忘 server send event(sse) - laravel 非同期通信

非同期通信 なかなかできなかった。

とりあえず、出かける時間なので、コード。
後で備忘記録的に追加しよう。

チャットモドキは
https://qiita.com/old_cat/items/1a7a6a25619544247b56

client - side

index.blade.php
<script>
$(function(){
  var source = new EventSource('sse');
  source.onmessage = function(event){
         alert(event.data);
  }
});
</script>

route

route
route::get ('index',function(){return view('index');});
route::get ('sse', 'XController@sse');

controller

XController
class XController extends Controller{
      public function sse(){
             header('Content-Type: text/event-stream');
             header('Cache-Control: no-cache');

             echo "data:'test'\n\n";
             flush();
      }  
}

複数データの送受信

controller
$array = ['A'=>'a','B'=>'b','C'=>'c'];

header('Content-Type:text/event-stream');
echo 'data:'.json_encode($array);
echo "\n\n";
flush();
source = new EventSource('sse');
source.onmessage = function(d){
  var receive = JSON.parse(d.data);
  var A       = receive.A;
  var B       = receive.B;
}

二次元配列の取り出し

controller
$user = User::all()->toArray();
header('Content-Type:text/event-stream');
header('Cache-Control:no-cache);
echo "data:".json_encode($form);
echo "\n\n";
flush();
javascript
var source = new EventSource('sse');    //controller public function sse(){}
    source.onmessage = function(m){
           message   = JSON.parse(m.data);
           message.user.forEach(function(mess){
                   console.log(mess);
                   console.log(mess.user_name);
           }
     }

EventSource -property

サーバーからの情報は、message-eventで配信される。

プロパティ 使用例とか 説明的とか戻り値とか
onerror ev.onerror=function(){};
onmessage ev.onmessage=function(e){};
onopen ev.onopne=function(){}; connection was just opened
readyState 0-connectiong 1-open 2-close read-only
url source's Url read-only
withCredentials cross orgin set boolean

下記サイト様。
参考になりました。ありがとうございました。

https://developer.mozilla.org/ja/docs/Web/API/EventSource
https://qiita.com/okumurakengo/items/cbe6b3717b95944083a1
https://qiita.com/okumurakengo/items/cbe6b3717b95944083a1

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