Question

我发现了一个脚本，可以从curl_multi请求中获得异步响应：

function rolling_curl($urls, $callback, $custom_options = null) {

// make sure the rolling window isn't greater than the # of urls
$rolling_window = 100;
$rolling_window = (sizeof($urls) < $rolling_window) ? sizeof($urls) : $rolling_window;

$master = curl_multi_init();
$curl_arr = array();

// add additional curl options here
$std_options = array(CURLOPT_RETURNTRANSFER => true,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_MAXREDIRS => 5);
$options = ($custom_options) ? ($std_options + $custom_options) : $std_options;
$hosts = array();
// start the first batch of requests
for ($i = 0; $i < $rolling_window; $i++) {
    $hosts[$i]=parse_url($urls[$i], PHP_URL_HOST);

    $ch = curl_init();
    $options[CURLOPT_URL] = $urls[$i];
    curl_setopt_array($ch,$options);
    curl_multi_add_handle($master, $ch);
}

do {
    while(($execrun = curl_multi_exec($master, $running)) == CURLM_CALL_MULTI_PERFORM);
    if($execrun != CURLM_OK)
        break;
    // a request was just completed -- find out which one
    while($done = curl_multi_info_read($master)) {
        $info = curl_getinfo($done['handle']);

        if ($info['http_code'] == 200)  {
            $output = curl_multi_getcontent($done['handle']);

            // request successful.  process output using the callback function.
           $id = array_search(parse_url($info['url'], PHP_URL_HOST),$hosts);
            $callback($output,true, $id);

            // start a new request (it's important to do this before removing the old one)
            if(@$u = $urls[$i++]){
              $ch = curl_init();
            $options[CURLOPT_URL] = $u;  // increment i
            curl_setopt_array($ch,$options);
            curl_multi_add_handle($master, $ch);  
            }




            // remove the curl handle that just completed
            curl_multi_remove_handle($master, $done['handle']);
        } else {
            $callback("",false);
        }
    }
} while ($running);

curl_multi_close($master);
return true;
}

这已经由我编辑了，因为我试图做的是在回调函数上保持url数组输入的索引。例如，如果输入数组是

$urls = array(0=> $url0, 1=> $url1, ...);

然后我希望当url1上的curl请求完成时，使用$ id = 1触发$ callback，以便我知道如何管理返回的数据，因为我知道它是url1。为了做到这一点，我想到在urls数组中找到curl url，但有时curl遵循redirect，所以它并不总是有效。然后我想到比较主机（幸运的是每个url在我的情况下都有不同的主机）并且它可以工作：我在创建curl句柄时创建一个主机数组，当请求完成时，我找到卷曲主机的索引到数组中。这不是获得我想要的最好的方法，因为网址与主机相同，它不会起作用，也许有一种棘手且更简单的方法。获取url索引的最佳方法是哪种？ PS：我的回调函数是

function callback($output,$success,$id){...}

curl_multi保持异步响应的请求索引

0 个答案: