在 PHP 中与 cURL 进行多路复用的工作示例

我不知道如何检查多路复用的操作，以及是否在执行期间。

我向 curl_multi_exec() 添加了4 个 curl_init ( )描述符，它们执行对一个域的请求。在CURLOPT_VERBOSE日志中，在第一个描述符的每个后续中，我看到以下行：

* Found bundle for host yandex.ru: 0x55adc86744f0 [serially] 

更多细节。

例子：

    // создаем дескриптор cURL
    $ch1 = curl_init();

    // устанавливаем опции
    curl_setopt($ch1, CURLOPT_URL, "https://yandex.ru");
    curl_setopt($ch1, CURLOPT_HEADER, 0);
    curl_setopt($ch1, CURLOPT_FILE, $curl1_exec);
    curl_setopt($ch1, CURLOPT_STDERR, $curl1_log);
    curl_setopt($ch1, CURLOPT_VERBOSE, 1);
    curl_setopt($ch1, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($ch1, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);

    // создаем новый дескриптор копированием существующего
    $ch2 = curl_copy_handle($ch1);
    // устанавливаем новые опции
    curl_setopt($ch2, CURLOPT_URL, "https://yandex.ru/all");
    curl_setopt($ch2, CURLOPT_FILE, $curl2_exec);
    curl_setopt($ch2, CURLOPT_STDERR, $curl2_log);

    // создаем новый дескриптор копированием существующего
    $ch3 = curl_copy_handle($ch1);
    // устанавливаем новые опции
    curl_setopt($ch3, CURLOPT_URL, "https://yandex.ru/news/");
    curl_setopt($ch3, CURLOPT_FILE, $curl3_exec);
    curl_setopt($ch3, CURLOPT_STDERR, $curl3_log);

    // создаем новый дескриптор копированием существующего
    $ch4 = curl_copy_handle($ch1);
    // устанавливаем новые опции
    curl_setopt($ch4, CURLOPT_URL, "https://yandex.ru/images/?from=tabbar");
    curl_setopt($ch4, CURLOPT_FILE, $curl4_exec);
    curl_setopt($ch4, CURLOPT_STDERR, $curl4_log);

    //создаем набор дескрипторов cURL
    $mh = curl_multi_init();

    //добавляем дескрипторы
    curl_multi_add_handle($mh, $ch1);
    curl_multi_add_handle($mh, $ch2);
    curl_multi_add_handle($mh, $ch3);
    curl_multi_add_handle($mh, $ch4);

    //добавляем попытку использовать мультиплексирование, если это возможно
    curl_multi_setopt($mh, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);

    //запускаем множественный обработчик
    do {
        $status = curl_multi_exec($mh, $active);
        if ($active) {
            // Ждем какое-то время для оживления активности
            curl_multi_select($mh);
        }
    } while ($active && $status == CURLM_OK);

    //закрываем дескрипторы
    curl_multi_close($mh);

连接信息。

第一的：

* Rebuilt URL to: https://yandex.ru/
* Hostname 'yandex.ru' was found in DNS cache
*   Trying 77.88.55.60...
* TCP_NODELAY set
* Connected to yandex.ru (77.88.55.60) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/certs/ca-certificates.crt
CApath: /etc/ssl/certs
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN, server accepted to use h2
* Server certificate:
*  subject: CN=yandex.ru; O=Yandex LLC; OU=ITO; L=Moscow; ST=Russia; C=RU
*  start date: Sep  5 11:12:34 2019 GMT
*  expire date: Sep  4 11:12:34 2020 GMT
*  subjectAltName: host "yandex.ru" matched cert's "yandex.ru"
*  issuer: C=RU; O=Yandex LLC; OU=Yandex Certification Authority; CN=Yandex CA
*  SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x556999495740)
> GET / HTTP/2
Host: yandex.ru
Accept: */*

第二：

* Found bundle for host yandex.ru: 0x5569994ce320 [serially]
* Server doesn't support multi-use (yet)
* Hostname 'yandex.ru' was found in DNS cache
*   Trying 77.88.55.60...
* TCP_NODELAY set
* Connected to yandex.ru (77.88.55.60) port 443 (#1)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/certs/ca-certificates.crt
CApath: /etc/ssl/certs
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN, server accepted to use h2
* Server certificate:
*  subject: CN=yandex.ru; O=Yandex LLC; OU=ITO; L=Moscow; ST=Russia; C=RU
*  start date: Sep  5 11:12:34 2019 GMT
*  expire date: Sep  4 11:12:34 2020 GMT
*  subjectAltName: host "yandex.ru" matched cert's "yandex.ru"
*  issuer: C=RU; O=Yandex LLC; OU=Yandex Certification Authority; CN=Yandex CA
*  SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x55699949ea40)
> GET /all HTTP/2
Host: yandex.ru
Accept: */*