如何在PHP中发出异步HTTP请求


209

PHP中有没有办法进行异步HTTP调用?我不在乎响应,我只想做类似的事情file_get_contents(),但不等待请求完成再执行其余代码。这对于在我的应用程序中触发某种“事件”或触发较长的进程非常有用。

有任何想法吗?


9
一个功能-'curl_multi',请在php文档中查找。应该解决您的问题
James Butler

22
该帖子的标题具有误导性。我来寻找与Node.js中的请求或AJAX请求类似的真正异步调用。可接受的答案不是异步的(它阻塞并且不提供回调),而只是一个更快的同步请求。考虑更改问题或接受的答案。
Johntron

通过标头和缓冲区处理连接处理不是安全的。我刚刚发布了一个独立于操作系统,浏览器或PHP版本的新答案
RafaSashi 2015年

1
异步并不意味着您不在乎响应。这仅表示该调用不会阻止主线程执行。异步仍然需要响应,但是响应可以在另一个执行线程中处理,也可以稍后在事件循环中进行处理。这个问题是一个即发即弃的请求,它可以同步还是异步,具体取决于消息传递的语义,无论您关心消息的顺序还是传递确认。
CMCDragonkai'3

我认为您应该以非阻塞模式发出此HTTP请求(w / c是您真正想要的)。因为调用资源时,您基本上想知道是否到达服务器(或出于何种原因,您只需要响应)。最好的答案实际上是fsockopen并将流读取或写入设置为非阻塞模式。这就像一劳永逸。
KiX Ortillan

Answers:


42

我以前接受的答案没有用。它仍然在等待回应。但这确实有效,取自我如何在PHP中发出异步GET请求?

function post_without_wait($url, $params)
{
    foreach ($params as $key => &$val) {
      if (is_array($val)) $val = implode(',', $val);
        $post_params[] = $key.'='.urlencode($val);
    }
    $post_string = implode('&', $post_params);

    $parts=parse_url($url);

    $fp = fsockopen($parts['host'],
        isset($parts['port'])?$parts['port']:80,
        $errno, $errstr, 30);

    $out = "POST ".$parts['path']." HTTP/1.1\r\n";
    $out.= "Host: ".$parts['host']."\r\n";
    $out.= "Content-Type: application/x-www-form-urlencoded\r\n";
    $out.= "Content-Length: ".strlen($post_string)."\r\n";
    $out.= "Connection: Close\r\n\r\n";
    if (isset($post_string)) $out.= $post_string;

    fwrite($fp, $out);
    fclose($fp);
}

67
这不是异步的!特别是如果另一端的服务器关闭,则这段代码将挂起30秒(fsockopen中的第5个参数)。同样,fwrite将花费其甜蜜的时间来执行(您可以用stream_set_timeout($ fp,$ my_timeout)进行限制。最好的办法是将fsockopen的低超时设置为0.1(100ms),将$ my_timeout设置为100ms但是,您可能会冒风险,因为请求超时
Chris Cinelli 2012年

3
我向您保证,它是异步的,不需要30秒。这是最大超时时间。您的设置可能会有所不同,这很可行,但这对我很有用。
布伦特

11
@UltimateBrent代码中没有任何内容表明它是异步的。它不等待响应,但这不是异步的。如果远程服务器打开连接然后挂起,则此代码将等待30秒,直到达到超时为止。
chmac

17
之所以看起来“异步”,是因为您没有在关闭套接字之前从套接字读取数据,因此即使服务器未及时发出响应,套接字也不会挂起。但是,这绝对不是异步的。如果写缓冲区已满(极不可能),您的脚本肯定会挂在那里。您应该考虑将标题更改为“无需等待响应即可请求网页”。
howanghk

3
这既不是异步的,也不是使用curl,您怎么敢称呼它curl_post_async甚至获得投票...
Daniel W.

27

如果您控制要异步调用的目标(例如,您自己的“ longtask.php”),则可以从该端关闭连接,并且两个脚本将并行运行。它是这样的:

  1. quick.php通过cURL打开longtask.php(这里没有魔术)
  2. longtask.php关闭连接并继续(魔术!)
  3. 关闭连接后,cURL返回到quick.php
  4. 两项任务并行进行

我已经尝试过了,而且效果很好。但是quick.php不会对longtask.php的工作一无所知,除非您在进程之间创建某种通信方式。

在执行其他操作之前,请在longtask.php中尝试此代码。它将关闭连接,但仍继续运行(并抑制任何输出):

while(ob_get_level()) ob_end_clean();
header('Connection: close');
ignore_user_abort();
ob_start();
echo('Connection Closed');
$size = ob_get_length();
header("Content-Length: $size");
ob_end_flush();
flush();

该代码是从PHP手册的用户注释中复制而来,并有所改进。


3
这会起作用。但是,如果您使用的是MVC框架,则可能难以实现,因为这些框架截取和重写调用的方式。例如,它在CakePHP的Controller中不起作用
Chris Cinelli,2012年

对这段代码有疑问,您需要在longtask中执行的过程必须在此行之后进行吗?谢谢。
莫尔加16/09/26

它并不完美。尝试while(true);在代码之后添加。该页面将挂起,这意味着它仍在前台运行。
زياد

17

您可以通过使用exec()调用可以执行HTTP请求的操作来欺骗,例如wget,但是必须将程序的所有输出定向到某个位置,例如文件或/ dev / null,否则PHP进程将等待该输出。 。

如果您想将进程与apache线程完全分开,请尝试以下方法(我不确定,但是希望您能理解):

exec('bash -c "wget -O (url goes here) > /dev/null 2>&1 &"');

这不是一件好事,您可能想要像cron作业那样调用心跳脚本的东西,该脚本轮询实际的数据库事件队列以执行真正的异步事件。


3
同样,我还完成了以下操作:exec(“ curl $ url> / dev / null&”);
马特·哈金斯

2
问题:调用“ bash -c“ wget””而不是“ wget”有好处吗?
马特·哈金斯

2
在我的测试中,使用exec("curl $url > /dev/null 2>&1 &");是这里最快的解决方案之一。它比post_without_wait()上面“已接受”答案中的函数(14.8s)快得多(100次迭代为1.9s)。而且这是
单线的

使用完整路径(例如/ usr / bin / curl)使其变得更快
Putnik

这会等到脚本完成吗?
cikatomo

11

截至2018年,Guzzle已成为HTTP请求的事实上的标准库,已在多个现代框架中使用。它是用纯PHP编写的,不需要安装任何自定义扩展。

它可以很好地执行异步HTTP调用,甚至可以合并它们,例如,当您需要进行100个HTTP调用,但又不想一次运行5个以上时。

并发请求示例

use GuzzleHttp\Client;
use GuzzleHttp\Promise;

$client = new Client(['base_uri' => 'http://httpbin.org/']);

// Initiate each request but do not block
$promises = [
    'image' => $client->getAsync('/image'),
    'png'   => $client->getAsync('/image/png'),
    'jpeg'  => $client->getAsync('/image/jpeg'),
    'webp'  => $client->getAsync('/image/webp')
];

// 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();

// You can access each result using the key provided to the unwrap
// function.
echo $results['image']['value']->getHeader('Content-Length')[0]
echo $results['png']['value']->getHeader('Content-Length')[0]

参见http://docs.guzzlephp.org/en/stable/quickstart.html#concurrent-requests


3
但是,此答案不是异步的。 显然不敢

2
食尸鬼要求您安装卷曲。否则,它是非并行的,并且不会向您发出任何非并行的警告。
Velizar Hristov '18

感谢链接@daslicious-是的,它似乎并不完全异步(例如,当您要发送请求但不关心结果时),但是该线程中的一些帖子提供了一种解决方法,设置一个非常低的请求超时值,该值仍然允许连接时间,但不等待结果。
西蒙·伊斯特

9
/**
 * Asynchronously execute/include a PHP file. Does not record the output of the file anywhere. 
 *
 * @param string $filename              file to execute, relative to calling script
 * @param string $options               (optional) arguments to pass to file via the command line
 */ 
function asyncInclude($filename, $options = '') {
    exec("/path/to/php -f {$filename} {$options} >> /dev/null &");
}

这不是异步的,因为exec在您退出或派生要运行的进程之前一直处于阻塞状态。
Daniel W.

6
您注意到&结尾了吗?
philfreo

那么这是否会阻止脚本,我很困惑?
pleshy

1
@pleshy不会。“&”号表示在后台运行脚本
daisura99

8

您可以使用此库:https : //github.com/stil/curl-easy

那就很简单了:

<?php
$request = new cURL\Request('http://yahoo.com/');
$request->getOptions()->set(CURLOPT_RETURNTRANSFER, true);

// Specify function to be called when your request is complete
$request->addListener('complete', function (cURL\Event $event) {
    $response = $event->response;
    $httpCode = $response->getInfo(CURLINFO_HTTP_CODE);
    $html = $response->getContent();
    echo "\nDone.\n";
});

// Loop below will run as long as request is processed
$timeStart = microtime(true);
while ($request->socketPerform()) {
    printf("Running time: %dms    \r", (microtime(true) - $timeStart)*1000);
    // Here you can do anything else, while your request is in progress
}

在下面您可以看到上面示例的控制台输出。它将显示简单的实时时钟,指示正在运行多少时间的请求:


动画


这应该是问题的公认答案,因为即使不是真正的异步,它也比公认的一个和所有“异步”答案要好得多(在这里您可以在执行请求时执行操作)
0ddlyoko

7
  1. 通过CURL设置较低的值来伪造请求中止CURLOPT_TIMEOUT_MS

  2. 设置ignore_user_abort(true)为在关闭连接后继续处理。

使用此方法,无需通过标头和缓冲区来实现连接处理,而过于依赖于OS,浏览器和PHP版本

主流程

function async_curl($background_process=''){

    //-------------get curl contents----------------

    $ch = curl_init($background_process);
    curl_setopt_array($ch, array(
        CURLOPT_HEADER => 0,
        CURLOPT_RETURNTRANSFER =>true,
        CURLOPT_NOSIGNAL => 1, //to timeout immediately if the value is < 1000 ms
        CURLOPT_TIMEOUT_MS => 50, //The maximum number of mseconds to allow cURL functions to execute
        CURLOPT_VERBOSE => 1,
        CURLOPT_HEADER => 1
    ));
    $out = curl_exec($ch);

    //-------------parse curl contents----------------

    //$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
    //$header = substr($out, 0, $header_size);
    //$body = substr($out, $header_size);

    curl_close($ch);

    return true;
}

async_curl('http://example.com/background_process_1.php');

后台流程

ignore_user_abort(true);

//do something...

NB

如果您希望cURL在不到一秒的时间内超时,则可以使用CURLOPT_TIMEOUT_MS,尽管“类Unix系统”上存在一个错误/“功能”,如果值<1000 ms且错误为“ cURL错误(28):达到超时”。此行为的解释是:

[...]

解决方案是使用CURLOPT_NOSIGNAL禁用信号

资源资源


您如何处理连接超时(解析,DNS)?当我将timeout_ms设置为1时,我总是以“ 4 ms之后解决超时”或类似的结果结束
Martin Wickman

我不知道,但是4毫秒的声音对我来说已经相当快了……我认为您无法通过更改任何卷曲设置来更快地解决问题。尝试优化目标请求也许……
RafaSashi

好的,但是timeout_ms = 1设置整个请求的超时时间。因此,如果您的解析时间超过1毫秒,则curl将超时并停止请求。我完全看不到它如何工作(假设解析需要> 1毫秒)。
Martin Wickman

4

让我告诉你我的路:)

需要在服务器上安装nodejs

(我的服务器发送1000 https get请求仅需2秒)

url.php:

<?
$urls = array_fill(0, 100, 'http://google.com/blank.html');

function execinbackground($cmd) { 
    if (substr(php_uname(), 0, 7) == "Windows"){ 
        pclose(popen("start /B ". $cmd, "r"));  
    } 
    else { 
        exec($cmd . " > /dev/null &");   
    } 
} 
fwite(fopen("urls.txt","w"),implode("\n",$urls);
execinbackground("nodejs urlscript.js urls.txt");
// { do your work while get requests being executed.. }
?>

urlscript.js>

var https = require('https');
var url = require('url');
var http = require('http');
var fs = require('fs');
var dosya = process.argv[2];
var logdosya = 'log.txt';
var count=0;
http.globalAgent.maxSockets = 300;
https.globalAgent.maxSockets = 300;

setTimeout(timeout,100000); // maximum execution time (in ms)

function trim(string) {
    return string.replace(/^\s*|\s*$/g, '')
}

fs.readFile(process.argv[2], 'utf8', function (err, data) {
    if (err) {
        throw err;
    }
    parcala(data);
});

function parcala(data) {
    var data = data.split("\n");
    count=''+data.length+'-'+data[1];
    data.forEach(function (d) {
        req(trim(d));
    });
    /*
    fs.unlink(dosya, function d() {
        console.log('<%s> file deleted', dosya);
    });
    */
}


function req(link) {
    var linkinfo = url.parse(link);
    if (linkinfo.protocol == 'https:') {
        var options = {
        host: linkinfo.host,
        port: 443,
        path: linkinfo.path,
        method: 'GET'
    };
https.get(options, function(res) {res.on('data', function(d) {});}).on('error', function(e) {console.error(e);});
    } else {
    var options = {
        host: linkinfo.host,
        port: 80,
        path: linkinfo.path,
        method: 'GET'
    };        
http.get(options, function(res) {res.on('data', function(d) {});}).on('error', function(e) {console.error(e);});
    }
}


process.on('exit', onExit);

function onExit() {
    log();
}

function timeout()
{
console.log("i am too far gone");process.exit();
}

function log() 
{
    var fd = fs.openSync(logdosya, 'a+');
    fs.writeSync(fd, dosya + '-'+count+'\n');
    fs.closeSync(fd);
}

1
请注意,许多托管服务提供商不允许使用某些PHP函数(例如popen / exec)。请参见disable_functions PHP指令。
Eugen Mihailescu,2016年

4

扩音器。https://github.com/matyhtf/swoole 用于PHP的异步和并发网络框架。

$client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC);

$client->on("connect", function($cli) {
    $cli->send("hello world\n");
});

$client->on("receive", function($cli, $data){
    echo "Receive: $data\n";
});

$client->on("error", function($cli){
    echo "connect fail\n";
});

$client->on("close", function($cli){
    echo "close\n";
});

$client->connect('127.0.0.1', 9501, 0.5);

4

您可以对PHP使用非阻塞套接字和pecl扩展之一:

您可以使用库为您的代码和pecl扩展之间提供一个抽象层:https : //github.com/reactphp/event-loop

您还可以基于以前的库使用异步http-client:https : //github.com/reactphp/http-client

查看其他ReactPHP库:http: //reactphp.org

注意异步模型。我建议在youtube上观看此视频: http //www.youtube.com/watch?v=


3
class async_file_get_contents extends Thread{
    public $ret;
    public $url;
    public $finished;
        public function __construct($url) {
        $this->finished=false;
        $this->url=$url;
    }
        public function run() {
        $this->ret=file_get_contents($this->url);
        $this->finished=true;
    }
}
$afgc=new async_file_get_contents("http://example.org/file.ext");

2

活动扩展

事件扩展非常合适。这是利比文的港口库该库旨在用于事件驱动的I / O,主要用于网络。

我编写了一个示例HTTP客户端,该客户端可安排许多HTTP请求并异步运行它们。

这是基于事件的示例HTTP客户端类扩展。

该类允许调度许多HTTP请求,然后异步运行它们。

http-client.php

<?php
class MyHttpClient {
  /// @var EventBase
  protected $base;
  /// @var array Instances of EventHttpConnection
  protected $connections = [];

  public function __construct() {
    $this->base = new EventBase();
  }

  /**
   * Dispatches all pending requests (events)
   *
   * @return void
   */
  public function run() {
    $this->base->dispatch();
  }

  public function __destruct() {
    // Destroy connection objects explicitly, don't wait for GC.
    // Otherwise, EventBase may be free'd earlier.
    $this->connections = null;
  }

  /**
   * @brief Adds a pending HTTP request
   *
   * @param string $address Hostname, or IP
   * @param int $port Port number
   * @param array $headers Extra HTTP headers
   * @param int $cmd A EventHttpRequest::CMD_* constant
   * @param string $resource HTTP request resource, e.g. '/page?a=b&c=d'
   *
   * @return EventHttpRequest|false
   */
  public function addRequest($address, $port, array $headers,
    $cmd = EventHttpRequest::CMD_GET, $resource = '/')
  {
    $conn = new EventHttpConnection($this->base, null, $address, $port);
    $conn->setTimeout(5);

    $req = new EventHttpRequest([$this, '_requestHandler'], $this->base);

    foreach ($headers as $k => $v) {
      $req->addHeader($k, $v, EventHttpRequest::OUTPUT_HEADER);
    }
    $req->addHeader('Host', $address, EventHttpRequest::OUTPUT_HEADER);
    $req->addHeader('Connection', 'close', EventHttpRequest::OUTPUT_HEADER);
    if ($conn->makeRequest($req, $cmd, $resource)) {
      $this->connections []= $conn;
      return $req;
    }

    return false;
  }


  /**
   * @brief Handles an HTTP request
   *
   * @param EventHttpRequest $req
   * @param mixed $unused
   *
   * @return void
   */
  public function _requestHandler($req, $unused) {
    if (is_null($req)) {
      echo "Timed out\n";
    } else {
      $response_code = $req->getResponseCode();

      if ($response_code == 0) {
        echo "Connection refused\n";
      } elseif ($response_code != 200) {
        echo "Unexpected response: $response_code\n";
      } else {
        echo "Success: $response_code\n";
        $buf = $req->getInputBuffer();
        echo "Body:\n";
        while ($s = $buf->readLine(EventBuffer::EOL_ANY)) {
          echo $s, PHP_EOL;
        }
      }
    }
  }
}


$address = "my-host.local";
$port = 80;
$headers = [ 'User-Agent' => 'My-User-Agent/1.0', ];

$client = new MyHttpClient();

// Add pending requests
for ($i = 0; $i < 10; $i++) {
  $client->addRequest($address, $port, $headers,
    EventHttpRequest::CMD_GET, '/test.php?a=' . $i);
}

// Dispatch pending requests
$client->run();

test.php

这是服务器端的示例脚本。

<?php
echo 'GET: ', var_export($_GET, true), PHP_EOL;
echo 'User-Agent: ', $_SERVER['HTTP_USER_AGENT'] ?? '(none)', PHP_EOL;

用法

php http-client.php

样本输出

Success: 200
Body:
GET: array (
  'a' => '1',
)
User-Agent: My-User-Agent/1.0
Success: 200
Body:
GET: array (
  'a' => '0',
)
User-Agent: My-User-Agent/1.0
Success: 200
Body:
GET: array (
  'a' => '3',
)
...

(修剪)

注意,该代码旨在用于CLI SAPI中的长期处理。


对于自定义协议,请考虑使用低级API,即缓冲区事件缓冲区。对于SSL / TLS通信,我建议将低级API与Event的ssl上下文结合使用。例子:


尽管Libevent的HTTP API很简单,但它不如缓冲区事件灵活。例如,HTTP API当前不支持自定义HTTP方法。但是使用底层API实际上可以实现任何协议。

EV扩展

我也写使用其他HTTP客户端的样本EV扩展与插座非阻塞模式。该代码比基于Event的示例更为冗长,因为Ev是通用事件循环。它不提供特定于网络的功能,但是它的EvIo监视程序能够侦听封装在套接字资源中的文件描述符。

这是一个基于Ev扩展的示例HTTP客户端。

Ev扩展实现了一个简单而强大的通用事件循环。它不提供特定于网络的监视程序,但其I / O监视程序可用于套接字的异步处理。

以下代码显示了如何安排HTTP请求以进行并行处理。

http-client.php

<?php
class MyHttpRequest {
  /// @var MyHttpClient
  private $http_client;
  /// @var string
  private $address;
  /// @var string HTTP resource such as /page?get=param
  private $resource;
  /// @var string HTTP method such as GET, POST etc.
  private $method;
  /// @var int
  private $service_port;
  /// @var resource Socket
  private $socket;
  /// @var double Connection timeout in seconds.
  private $timeout = 10.;
  /// @var int Chunk size in bytes for socket_recv()
  private $chunk_size = 20;
  /// @var EvTimer
  private $timeout_watcher;
  /// @var EvIo
  private $write_watcher;
  /// @var EvIo
  private $read_watcher;
  /// @var EvTimer
  private $conn_watcher;
  /// @var string buffer for incoming data
  private $buffer;
  /// @var array errors reported by sockets extension in non-blocking mode.
  private static $e_nonblocking = [
    11, // EAGAIN or EWOULDBLOCK
    115, // EINPROGRESS
  ];

  /**
   * @param MyHttpClient $client
   * @param string $host Hostname, e.g. google.co.uk
   * @param string $resource HTTP resource, e.g. /page?a=b&c=d
   * @param string $method HTTP method: GET, HEAD, POST, PUT etc.
   * @throws RuntimeException
   */
  public function __construct(MyHttpClient $client, $host, $resource, $method) {
    $this->http_client = $client;
    $this->host        = $host;
    $this->resource    = $resource;
    $this->method      = $method;

    // Get the port for the WWW service
    $this->service_port = getservbyname('www', 'tcp');

    // Get the IP address for the target host
    $this->address = gethostbyname($this->host);

    // Create a TCP/IP socket
    $this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
    if (!$this->socket) {
      throw new RuntimeException("socket_create() failed: reason: " .
        socket_strerror(socket_last_error()));
    }

    // Set O_NONBLOCK flag
    socket_set_nonblock($this->socket);

    $this->conn_watcher = $this->http_client->getLoop()
      ->timer(0, 0., [$this, 'connect']);
  }

  public function __destruct() {
    $this->close();
  }

  private function freeWatcher(&$w) {
    if ($w) {
      $w->stop();
      $w = null;
    }
  }

  /**
   * Deallocates all resources of the request
   */
  private function close() {
    if ($this->socket) {
      socket_close($this->socket);
      $this->socket = null;
    }

    $this->freeWatcher($this->timeout_watcher);
    $this->freeWatcher($this->read_watcher);
    $this->freeWatcher($this->write_watcher);
    $this->freeWatcher($this->conn_watcher);
  }

  /**
   * Initializes a connection on socket
   * @return bool
   */
  public function connect() {
    $loop = $this->http_client->getLoop();

    $this->timeout_watcher = $loop->timer($this->timeout, 0., [$this, '_onTimeout']);
    $this->write_watcher = $loop->io($this->socket, Ev::WRITE, [$this, '_onWritable']);

    return socket_connect($this->socket, $this->address, $this->service_port);
  }

  /**
   * Callback for timeout (EvTimer) watcher
   */
  public function _onTimeout(EvTimer $w) {
    $w->stop();
    $this->close();
  }

  /**
   * Callback which is called when the socket becomes wriable
   */
  public function _onWritable(EvIo $w) {
    $this->timeout_watcher->stop();
    $w->stop();

    $in = implode("\r\n", [
      "{$this->method} {$this->resource} HTTP/1.1",
      "Host: {$this->host}",
      'Connection: Close',
    ]) . "\r\n\r\n";

    if (!socket_write($this->socket, $in, strlen($in))) {
      trigger_error("Failed writing $in to socket", E_USER_ERROR);
      return;
    }

    $loop = $this->http_client->getLoop();
    $this->read_watcher = $loop->io($this->socket,
      Ev::READ, [$this, '_onReadable']);

    // Continue running the loop
    $loop->run();
  }

  /**
   * Callback which is called when the socket becomes readable
   */
  public function _onReadable(EvIo $w) {
    // recv() 20 bytes in non-blocking mode
    $ret = socket_recv($this->socket, $out, 20, MSG_DONTWAIT);

    if ($ret) {
      // Still have data to read. Append the read chunk to the buffer.
      $this->buffer .= $out;
    } elseif ($ret === 0) {
      // All is read
      printf("\n<<<<\n%s\n>>>>", rtrim($this->buffer));
      fflush(STDOUT);
      $w->stop();
      $this->close();
      return;
    }

    // Caught EINPROGRESS, EAGAIN, or EWOULDBLOCK
    if (in_array(socket_last_error(), static::$e_nonblocking)) {
      return;
    }

    $w->stop();
    $this->close();
  }
}

/////////////////////////////////////
class MyHttpClient {
  /// @var array Instances of MyHttpRequest
  private $requests = [];
  /// @var EvLoop
  private $loop;

  public function __construct() {
    // Each HTTP client runs its own event loop
    $this->loop = new EvLoop();
  }

  public function __destruct() {
    $this->loop->stop();
  }

  /**
   * @return EvLoop
   */
  public function getLoop() {
    return $this->loop;
  }

  /**
   * Adds a pending request
   */
  public function addRequest(MyHttpRequest $r) {
    $this->requests []= $r;
  }

  /**
   * Dispatches all pending requests
   */
  public function run() {
    $this->loop->run();
  }
}


/////////////////////////////////////
// Usage
$client = new MyHttpClient();
foreach (range(1, 10) as $i) {
  $client->addRequest(new MyHttpRequest($client, 'my-host.local', '/test.php?a=' . $i, 'GET'));
}
$client->run();

测试中

假设http://my-host.local/test.php脚本正在打印以下内容的转储$_GET

<?php
echo 'GET: ', var_export($_GET, true), PHP_EOL;

然后,php http-client.php命令的输出将类似于以下内容:

<<<<
HTTP/1.1 200 OK
Server: nginx/1.10.1
Date: Fri, 02 Dec 2016 12:39:54 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: close
X-Powered-By: PHP/7.0.13-pl0-gentoo

1d
GET: array (
  'a' => '3',
)

0
>>>>
<<<<
HTTP/1.1 200 OK
Server: nginx/1.10.1
Date: Fri, 02 Dec 2016 12:39:54 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: close
X-Powered-By: PHP/7.0.13-pl0-gentoo

1d
GET: array (
  'a' => '2',
)

0
>>>>
...

(已修剪)

请注意,在PHP 5中的插座扩展可以登录的警告EINPROGRESSEAGAINEWOULDBLOCK errno值。可以通过关闭日志

error_reporting(E_ERROR);

关于守则的“其余部分”

我只想做类似的事情file_get_contents(),但不等待请求完成再执行其余代码。

例如,可以与网络请求并行运行的代码可以在Event timer或Ev的空闲监视程序的回调中执行。您可以通过观看上面提到的示例轻松地弄清楚。否则,我将添加另一个示例:)


1

这是一个有效的示例,只需运行它并随后打开storage.txt,以检查神奇的结果

<?php
    function curlGet($target){
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $target);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $result = curl_exec ($ch);
        curl_close ($ch);
        return $result;
    }

    // Its the next 3 lines that do the magic
    ignore_user_abort(true);
    header("Connection: close"); header("Content-Length: 0");
    echo str_repeat("s", 100000); flush();

    $i = $_GET['i'];
    if(!is_numeric($i)) $i = 1;
    if($i > 4) exit;
    if($i == 1) file_put_contents('storage.txt', '');

    file_put_contents('storage.txt', file_get_contents('storage.txt') . time() . "\n");

    sleep(5);
    curlGet($_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME'] . '?i=' . ($i + 1));
    curlGet($_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME'] . '?i=' . ($i + 1));

1

当我将POST张贴到任何页面的特定URL时,这是我自己的PHP函数。示例:***我的函数的用法...

    <?php
        parse_str("email=myemail@ehehehahaha.com&subject=this is just a test");
        $_POST['email']=$email;
        $_POST['subject']=$subject;
        echo HTTP_POST("http://example.com/mail.php",$_POST);***

    exit;
    ?>
    <?php
    /*********HTTP POST using FSOCKOPEN **************/
    // by ArbZ

function HTTP_Post($URL,$data, $referrer="") {

    // parsing the given URL
    $URL_Info=parse_url($URL);

    // Building referrer
    if($referrer=="") // if not given use this script as referrer
        $referrer=$_SERVER["SCRIPT_URI"];

    // making string from $data
    foreach($data as $key=>$value)
        $values[]="$key=".urlencode($value);
        $data_string=implode("&",$values);

    // Find out which port is needed - if not given use standard (=80)
    if(!isset($URL_Info["port"]))
        $URL_Info["port"]=80;

    // building POST-request: HTTP_HEADERs
    $request.="POST ".$URL_Info["path"]." HTTP/1.1\n";
    $request.="Host: ".$URL_Info["host"]."\n";
    $request.="Referer: $referer\n";
    $request.="Content-type: application/x-www-form-urlencoded\n";
    $request.="Content-length: ".strlen($data_string)."\n";
    $request.="Connection: close\n";
    $request.="\n";
    $request.=$data_string."\n";

    $fp = fsockopen($URL_Info["host"],$URL_Info["port"]);
    fputs($fp, $request);
    while(!feof($fp)) {
        $result .= fgets($fp, 128);
    }
    fclose($fp); //$eco = nl2br();


    function getTextBetweenTags($string, $tagname) {
        $pattern = "/<$tagname ?.*>(.*)<\/$tagname>/";
        preg_match($pattern, $string, $matches);
        return $matches[1];
    }
    //STORE THE FETCHED CONTENTS to a VARIABLE, because its way better and fast...
    $str = $result;
    $txt = getTextBetweenTags($str, "span"); $eco = $txt;  $result = explode("&",$result);
    return $result[1];
    <span style=background-color:LightYellow;color:blue>".trim($_GET['em'])."</span>
    </pre> "; 
}
</pre>

1

ReactPHP异步http客户端
https://github.com/shuchkin/react-http-client

通过Composer安装

$ composer require shuchkin/react-http-client

异步HTTP GET

// get.php
$loop = \React\EventLoop\Factory::create();

$http = new \Shuchkin\ReactHTTP\Client( $loop );

$http->get( 'https://tools.ietf.org/rfc/rfc2068.txt' )->then(
    function( $content ) {
        echo $content;
    },
    function ( \Exception $ex ) {
        echo 'HTTP error '.$ex->getCode().' '.$ex->getMessage();
    }
);

$loop->run();

在CLI模式下运行php

$ php get.php

0

我发现此软件包非常有用且非常简单:https : //github.com/amphp/parallel-functions

<?php

use function Amp\ParallelFunctions\parallelMap;
use function Amp\Promise\wait;

$responses = wait(parallelMap([
    'https://google.com/',
    'https://github.com/',
    'https://stackoverflow.com/',
], function ($url) {
    return file_get_contents($url);
}));

它将并行加载所有3个URL。您也可以在闭包中使用类实例方法。

例如,我基于此包使用Laravel扩展 https://github.com/spatie/laravel-collection-macros#parallelmap的

这是我的代码:

    /**
     * Get domains with all needed data
     */
    protected function getDomainsWithdata(): Collection
    {
        return $this->opensrs->getDomains()->parallelMap(function ($domain) {
            $contact = $this->opensrs->getDomainContact($domain);
            $contact['domain'] = $domain;
            return $contact;
        }, 10);
    }

它在10个并行线程中加载了所有需要的数据,而不需要50秒,而没有异步,它仅需8秒即可完成。


0

Symfony HttpClient是异步https://symfony.com/doc/current/components/http_client.html

例如你可以

use Symfony\Component\HttpClient\HttpClient;

$client = HttpClient::create();
$response1 = $client->request('GET', 'https://website1');
$response2 = $client->request('GET', 'https://website1');
$response3 = $client->request('GET', 'https://website1');
//these 3 calls with return immediately
//but the requests will fire to the website1 webserver

$response1->getContent(); //this will block until content is fetched
$response2->getContent(); //same 
$response3->getContent(); //same

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