SSE - Codeigniter - 输出内容 [英] SSE - Codeigniter - Output content
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问题描述
我正在 PHP Codeigniter 应用程序中实现服务器发送的事件.
I am implementing Server-Sent Events in my PHP Codeigniter application.
我有一个长时间运行的脚本,SSE 会为用户显示进度条.
I have a long running script and SSE shows progress bar for the user.
这一点很好用.
缺失的部分:当所有数据都准备好后,我如何显示我的 HTML 内容?
PHP:
public function LongRunningScript() {
header("Content-Type: text/event-stream");
header("Cache-Control: no-cache");
header("Connection: keep-alive");
function send_message($id, $progress) {
$d = array('message' => "", 'progress' => $progress);
echo "id: $id" . PHP_EOL;
echo "data: " . json_encode($d) . PHP_EOL;
echo PHP_EOL;
ob_flush();
flush();
}
//LONG RUNNING TASK
for ($i = 1; $i <= 10; $i++) {
send_message($i, $i * 10);
sleep(1);
}
// now all data is ready and i would like to do something like this:
// $this->data['content'] = $this->load->view('view.php', $this->data, true);
}
JS:
function startTask() {
event_source = new EventSource('controller/LongRunningScript');
//a message is received
event_source.addEventListener('message', function (e) {
var result = JSON.parse(e.data);
if (e.lastEventId == 'CLOSE') {
//addLog('Received CLOSE closing');
event_source.close();
var pBar = document.getElementById('progressor');
pBar.value = pBar.max; //max out the progress bar
} else {
var pBar = document.getElementById('progressor');
pBar.value = result.progress;
var perc = document.getElementById('percentage');
perc.innerHTML = result.progress + "%";
//perc.style.width = (Math.floor(pBar.clientWidth * (result.progress / 100)) + 15) + 'px';
}
});
event_source.addEventListener('error', function (e) {
event_source.close();
});
}
function stopTask() {
event_source.close();
}
推荐答案
您有两个选择:您可以将新视图的所有 html 发送到 SSE 连接,然后断开前端连接.
You have two options: you could send all the html for the new view down the SSE connection, then have the front-end disconnect.
但更简单的方法是让 JS 代码检测进度表何时达到 100%,然后:
But simpler would be to have the JS code detect when the progress meter has reached 100%, and then:
- 断开 SSE 连接
- 请求一个新的 URL,它将获取并显示您所创建的新视图想送.
即进度表使用SSE,正常显示使用正常请求.
I.e. use SSE for the progress meter, use a normal request for the normal display.
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