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再一个http请求中如何异步发送一个http请求

### 问题描述
再一个http请求中如何 异步发送一个http请求

### Swoole版本，PHP版本，以及操作系统版本信息
php 
PHP 7.4.2 (cli) (built: Feb 17 2020 12:56:02) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies

swoole

Swoole => enabled
Author => Swoole Team <team@swoole.com>
Version => 4.5.2
Built => Feb 24 2021 19:21:10
coroutine => enabled
debug => enabled
trace_log => enabled
kqueue => enabled
rwlock => enabled
pcre => enabled
zlib => 1.2.11
brotli => E16777223/D16777223
async_redis => enabled

Directive => Local Value => Master Value
swoole.enable_coroutine => Off => Off
swoole.enable_library => On => On
swoole.enable_preemptive_scheduler => On => On
swoole.display_errors => On => On
swoole.use_shortname => On => On
swoole.unixsock_buffer_size => 262144 => 262144

### 相关代码
```php
<?php
use function Swoole\Coroutine\run;
use function Swoole\Coroutine\go;

$http = new Swoole\Http\Server('127.0.0.1', 9501);

$http->on('start', function ($server) {
    echo "Swoole http server is started at http://127.0.0.1:9501\n";
});

$http->on('request', function ($request, $response) {

run(function() {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, 'http://localhost:5200/');
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $result = curl_exec($ch);
        curl_close($ch);
        var_dump($result);
    });
	$response->header('Content-Type', 'text/plain');
    $response->end('Hello World');
});

$http->start();

```

### 你期待的结果是什么？实际看到的错误信息又是什么？
请求'http://localhost:5200/ 会阻塞

发布于1年前 · 18 次浏览 · 来自提问