如何使用 GuzzleHttp 执行并发请求

Question

如何使用 Guzzle 6 在以下条件下创建 5 个异步请求：

• 所有请求同时开始
• 我希望所有请求的超时值为 500 毫秒。如果请求超时，我不希望它中断其他请求
• 如果请求返回非 200，我不希望它中断其他请求。
• 所有请求都在不同的域上...（所以我不确定这与 base_uri 设置是否相符...

如果所有 5 个请求都返回 200OK

但是，如果说其中 2 个没有 200 并且其中 1 个超时（超过 500 毫秒），我希望仍然能够访问 2 个成功的响应。

编辑到目前为止一切正常，除了超时仍然引发异常

这是我目前所拥有的：

<?php

  require __DIR__.'/../vendor/autoload.php';

  use GuzzleHttp\Client;
  use GuzzleHttp\Promise;

  $client = new Client([
    'http_errors'     => false,
    'connect_timeout' => 1.50, //////////////// 0.50
    'timeout'         => 2.00, //////////////// 1.00
    'headers' => [
      'User-Agent' => 'Test/1.0'
    ]
  ]);

  // initiate each request but do not block
  $promises = [
    'success'            => $client->getAsync('https://httpbin.org/get'),
    'success'            => $client->getAsync('https://httpbin.org/delay/1'),
    'failconnecttimeout' => $client->getAsync('https://httpbin.org/delay/2'),
    'fail500'            => $client->getAsync('https://httpbin.org/status/500'),
  ];

  // wait on all of the requests to complete. Throws a ConnectException if any
  // of the requests fail
  $results = Promise\unwrap($promises);

  // wait for the requests to complete, even if some of them fail
  $results = Promise\settle($promises)->wait();

Answer 1

Guzzle 在池中提供 fulfilled 和 rejected 回调。在这里我根据你的价值观进行了测试，在Guzzle docs阅读更多内容：

    $client = new Client([
        'http_errors'     => false,
        'connect_timeout' => 0.50, //////////////// 0.50
        'timeout'         => 1.00, //////////////// 1.00
        'headers' => [
          'User-Agent' => 'Test/1.0'
        ]
      ]);

$requests = function ($total) {
    $uris = [
        'https://httpbin.org/get',
        'https://httpbin.org/delay/1',
        'https://httpbin.org/delay/2',
        'https://httpbin.org/status/500',
        ];
    for ($i = 0; $i < count($uris); $i++) {
        yield new Request('GET', $uris[$i]);
    }
};

$pool = new Pool($client, $requests(8), [
    'concurrency' => 10,
    'fulfilled' => function ($response, $index) {
        // this is delivered each successful response
        print_r($index."fulfilled\n");
    },
    'rejected' => function ($reason, $index) {
        // this is delivered each failed request
        print_r($index."rejected\n");
    },
]);
// Initiate the transfers and create a promise
$promise = $pool->promise();
// Force the pool of requests to complete.
$promise->wait();

回复

0fulfilled
3fulfilled
1rejected
2rejected

如果您想使用上面的代码，您还可以在 $promises 中传递响应状态，这是一个示例：

use Psr\Http\Message\ResponseInterface;
use GuzzleHttp\Exception\RequestException;
....
$client = new Client([
    'http_errors'     => false,
    'connect_timeout' => 1.50, //////////////// 0.50
    'timeout'         => 2.00, //////////////// 1.00
    'headers' => [
      'User-Agent' => 'Test/1.0'
    ]
  ]);

            $promises = [
        'success' => $client->getAsync('https://httpbin.org/get')->then(
            function (ResponseInterface $res) {
                echo $res->getStatusCode() . "\n";
            },
            function (RequestException $e) {
                echo $e->getMessage() . "\n";
                echo $e->getRequest()->getMethod();
            }
        )
        ,
        'success' => $client->getAsync('https://httpbin.org/delay/1')->then(
            function (ResponseInterface $res) {
                echo $res->getStatusCode() . "\n";
            },
            function (RequestException $e) {
                echo $e->getMessage() . "\n";
                echo $e->getRequest()->getMethod();
            }
        ),
        'failconnecttimeout' => $client->getAsync('https://httpbin.org/delay/2')->then(
            function (ResponseInterface $res) {
                echo $res->getStatusCode() . "\n";
            },
            function (RequestException $e) {
                echo $e->getMessage() . "\n";
                echo $e->getRequest()->getMethod();
            }
        ),
        'fail500' => $client->getAsync('https://httpbin.org/status/500')->then(
            function (ResponseInterface $res) {
                echo $res->getStatusCode() . "\n";
            },
            function (RequestException $e) {
                echo $e->getMessage() . "\n";
                echo $e->getRequest()->getMethod();
            }
        ),
      ];

  $results = Promise\settle($promises)->wait();