它运行的控制方法异步调用PHP [英] Asynchronous PHP call which runs a controller method

问题描述

我要上一个按钮单击事件执行：

I want to execute on a button click event:

localhost/codeigniter/controller/method

的方法，将来自一个网页（多个）中提取的关键字，并将它们存储在数据库中。 有多个子方法，它也应该在后台运行。我不想作出这样的持续时间内用户等待。
我读这个。将这项工作给我吗？
任何其他救生建议者居多。

The method will extract keywords from a webpage(s) and store them in DB. There are multiple sub-methods in it which should also run in background. I don't want to make the user wait during that duration. I read this. Will this work for me ? Any other life saving suggestions are most welcome.

推荐答案

根据这个线程我做了这个为我的codeigniter项目。它的工作原理就好了。您可以在后台处理任何功能。

Based on this thread I made this for my codeigniter project. It works just fine. You can have any function processed in the background.

这是接受异步调用的控制器。

A controller that accepts the async calls.

class Daemon extends CI_Controller
{
    // Remember to disable CI's csrf-checks for this controller

    function index( )
    {
        ignore_user_abort( 1 );
        try
        {
            if ( strcmp( $_SERVER['REMOTE_ADDR'], $_SERVER['SERVER_ADDR'] ) != 0 && !in_array( $_SERVER['REMOTE_ADDR'], $this->config->item( 'proxy_ips' ) ) )
            {
                log_message( "error", "Daemon called from untrusted IP-address: " . $_SERVER['REMOTE_ADDR'] );
                show_404( '/daemon' );
                return;
            }

            $this->load->library( 'encrypt' );
            $params = unserialize( urldecode( $this->encrypt->decode( $_POST['data'] ) ) );
            unset( $_POST );
            $model = array_shift( $params );
            $method = array_shift( $params );
            $this->load->model( $model );
            if ( call_user_func_array( array( $this->$model, $method ), $params ) === FALSE )
            {
                log_message( "error", "Daemon could not call: " . $model . "::" . $method . "()" );
            }
        }
        catch(Exception $e)
        {
            log_message( "error", "Daemon has error: " . $e->getMessage( ) . $e->getFile( ) . $e->getLine( ) );
        }
    }
}

和，做了异步调用的库

class Daemon
{
    public function execute_background( /* model, method, params */ )
    {
        $ci = &get_instance( );
        // The callback URL (its ourselves)
        $parts = parse_url( $ci->config->item( 'base_url' ) . "/daemon" );
        if ( strcmp( $parts['scheme'], 'https' ) == 0 )
        {
            $port = 443;
            $host = "ssl://" . $parts['host'];
        }
        else 
        {
            $port = 80;
            $host = $parts['host'];
        }
        if ( ( $fp = fsockopen( $host, isset( $parts['port'] ) ? $parts['port'] : $port, $errno, $errstr, 30 ) ) === FALSE )
        {
            throw new Exception( "Internal server error: background process could not be started" );
        }
        $ci->load->library( 'encrypt' );
        $post_string = "data=" . urlencode( $ci->encrypt->encode( serialize( func_get_args( ) ) ) );
        $out = "POST " . $parts['path'] . " HTTP/1.1\r\n";
        $out .= "Host: " . $host . "\r\n";
        $out .= "Content-Type: application/x-www-form-urlencoded\r\n";
        $out .= "Content-Length: " . strlen( $post_string ) . "\r\n";
        $out .= "Connection: Close\r\n\r\n";
        $out .= $post_string;
        fwrite( $fp, $out );
        fclose( $fp );
    }
}

此方法可以被调用来处理任何模型::（）方法中的背景。它采用可变参数。

This method can be called to process any model::method() in the 'background'. It uses variable arguments.

$this->load->library('daemon');
$this->daemon->execute_background( 'model', 'method', $arg1, $arg2, ... );

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