php - 建议 : 8 million send request

Question

我被编码为一个 php 机器人。现在我想发送一个800万的请求。是的，例如:

我使用 multi_curl* 但有问题。

我使用linux并行库的问题。

也许你有什么建议？

PHP 7.1.1，Linux Ubuntu 16.0.1

myfnc(){
    i=1264609
 echo "$(($1+i))";
 response=$(curl --write-out %{http_code} --silent --output /dev/null http://localhost/botum/index.php?i=$(($1+i)))
 echo $response
}
export -f myfnc
seq 100 | parallel -j0 myfnc

多重 curl 问题:

set_time_limit(0);
ini_set("max_execution_time",-1);
$nodes = array();

for($i =1366295;$i<1396296;$i++){
    array_push($nodes,"http://165.227.152.138/botum2/index.php?i=$i");
}

$node_count = count($nodes);

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

for($i = 0; $i < $node_count; $i++)
{
    $url =$nodes[$i];
 //problems code start
    $curl_arr[$i] = curl_init($url);
    curl_setopt($curl_arr[$i], CURLOPT_RETURNTRANSFER, true);
//problems code end
    curl_multi_add_handle($master, $curl_arr[$i]);

}

do {
    curl_multi_exec($master,$running);
} while($running > 0);


for($i = 0; $i < $node_count; $i++)
{
    $results[] = curl_multi_getcontent  ( $curl_arr[$i]  );
}
print_r($results);

Answer 1

你的curl代码正在尝试同时启动130万个curl句柄，并且显然会耗尽资源(但是你没有发现这一点，因为你没有检查curl_init()的返回值，如果你做了类似if(!($curl_arr[$i] = curl_init($url))){throw new\RuntimeException("curl_init failed!");}的事情，那么你就会有注意到了)

此外，您在这里使用了繁忙循环

do {
    curl_multi_exec($master,$running);
} while($running > 0);

这意味着当句柄执行时，你将使用 100% 的 cpu，没有任何该死的原因，而你应该一直用curl_multi_select 等待。

这是curl_multi的工作，但你只是用错了它。我的建议是稍微修改 Which performs faster, headless browser or Curl? 中的代码,

这将执行 800 万个请求，在完成时打印响应，并且永远不会同时使用超过 500 个连接，并使用异步 select() 方法在等待网络 IO 时不使用任何 cpu，

curl_multi_fetch_and_print("http://165.227.152.138/botum2/index.php?i=",8000000,500,10000,true,true);
function curl_multi_fetch_and_print(string $base_url, int $count, int $max_connections, int $timeout_ms = 10000, bool $consider_http_300_redirect_as_error = true, bool $print_fault_reason): void
{
    if ($max_connections < 1) {
        throw new InvalidArgumentException("max_connections MUST be >=1");
    }
    if ($count < 1) {
        throw new InvalidArgumentException("count MUST be >=1");
    }
    $mh = curl_multi_init();
    $workers = array();
    $work = function () use (&$workers, &$mh, &$print_fault_reason) {
        // > If an added handle fails very quickly, it may never be counted as a running_handle
        while (1) {
            curl_multi_exec($mh, $still_running);
            if ($still_running < count($workers)) {
                break;
            }
            $cms = curl_multi_select($mh, 10);
            //var_dump('sr: ' . $still_running . " c: " . count($workers)." cms: ".$cms);
        }
        while (false !== ($info = curl_multi_info_read($mh))) {
            //echo "NOT FALSE!";
            //var_dump($info);
            {
                if ($info['msg'] !== CURLMSG_DONE) {
                    continue;
                }
                if ($info['result'] !== CURLM_OK) {
                    if ($print_fault_reason) {
                        echo "request #" . ($workers[(int)$info['handle']]) . " error: " . print_r(array(false, $info['result'], "curl_exec error " . $info['result'] . ": " . curl_strerror($info['result'])), true) . PHP_EOL;
                    }
                } elseif (CURLE_OK !== ($err = curl_errno($info['handle']))) {
                    if ($print_fault_reason) {
                        echo "request #" . ($workers[(int)$info['handle']]) . " error: " . print_r(array(false, $err, "curl error " . $err . ": " . curl_strerror($err)), true) . PHP_EOL;
                    }
                } else {
                    $code = (string)curl_getinfo($info['handle'], CURLINFO_HTTP_CODE);
                    if ($code[0] === "3") {
                        if ($consider_http_300_redirect_as_error) {
                            if ($print_fault_reason) {
                                echo "request #" . ($workers[(int)$info['handle']]) . " error: " . print_r(array(false, -1, "got a http " . $code . " redirect, which is considered an error"), true) . PHP_EOL;
                            }
                        } else {
                            //if ($print_fault_reason) {
                            //    echo "request #" . ($workers[(int)$info['handle']]) . " success: " . print_r(array(true, 0, "got a http " . $code . " redirect, which is considered a success"), true).PHP_EOL;
                            //} else {
                            // ... got a http redirect, which is not considered an errror,
                            echo "request #" . ($workers[(int)$info['handle']]) . " success: (http {$code} redirect)\n";
                            //}
                        }
                    } elseif ($code[0] === "2") {
                        if ($print_fault_reason) {
                            echo "request #" . ($workers[(int)$info['handle']]) . " success: http {$code}: " . curl_multi_getcontent($info['handle']) . PHP_EOL;
                        } else {
                            echo "request #" . ($workers[(int)$info['handle']]) . ": " . curl_multi_getcontent($info['handle']) . PHP_EOL;
                        }
                    } else {
                        // all non-2xx and non-3xx are always considered errors (500 internal server error, 400 client error, 404 not found, etcetc)
                        if ($print_fault_reason) {
                            echo "request #" . ($workers[(int)$info['handle']]) . " error: " . print_r(array(false, -1, "got a http " . $code . " code, which is considered an error"), true) . PHP_EOL;
                        }
                    }
                }
                curl_multi_remove_handle($mh, $info['handle']);
                assert(isset($workers[(int)$info['handle']]));
                unset($workers[(int)$info['handle']]);
                curl_close($info['handle']);
            }
        }
        //echo "NO MORE INFO!";
    };
    for ($i = 0; $i < $count; ++$i) {
        $url = $base_url . $i;
        while (count($workers) >= $max_connections) {
            //echo "TOO MANY WORKERS!\n";
            $work();
        }
        $neww = curl_init($url);
        if (!$neww) {
            trigger_error("curl_init() failed! probably means that max_connections is too high and you ran out of resources", E_USER_WARNING);
            if ($print_fault_reason) {
                echo "request #{$i} error: curl_init() failed!" . PHP_EOL;
            }
            continue;
        }
        $workers[(int)$neww] = $url;
        curl_setopt_array($neww, array(
            //CURLOPT_NOBODY => 1,
            CURLOPT_RETURNTRANSFER=>1,
            CURLOPT_SSL_VERIFYHOST => 0,
            CURLOPT_SSL_VERIFYPEER => 0,
            CURLOPT_TIMEOUT_MS => $timeout_ms
        ));
        curl_multi_add_handle($mh, $neww);
        //curl_multi_exec($mh, $unused_here); LIKELY TO BE MUCH SLOWER IF DONE IN THIS LOOP: TOO MANY SYSCALLS
    }
    while (count($workers) > 0) {
        //echo "WAITING FOR WORKERS TO BECOME 0!";
        //var_dump(count($workers));
        $work();
    }
    curl_multi_close($mh);
    return;
}