PHP中是否有一种方法可以使HTTP调用不等待响应?我不关心响应,我只想做一些类似file_get_contents()的事情,但不等待请求完成后再执行其余的代码。这对于在我的应用程序中触发某种“事件”或触发长进程非常有用。
什么好主意吗?
PHP中是否有一种方法可以使HTTP调用不等待响应?我不关心响应,我只想做一些类似file_get_contents()的事情,但不等待请求完成后再执行其余的代码。这对于在我的应用程序中触发某种“事件”或触发长进程非常有用。
什么好主意吗?
当前回答
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;
}
}
$afgc=new async_file_get_contents("http://example.org/file.ext");
其他回答
使用CURL设置低CURLOPT_TIMEOUT_MS来模拟请求中止 设置ignore_user_abort(true)在连接关闭后继续处理。
使用这种方法,不需要通过头文件和缓冲区来实现连接处理,这太依赖于操作系统,浏览器和PHP版本
主进程
function async_curl($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');
后台进程
ignore_user_abort(true);
//do something...
NB
如果希望cURL在不到一秒的时间内超时,可以使用 CURLOPT_TIMEOUT_MS,尽管在类unix上有一个bug/“特性” 如果值为<,则会导致libcurl立即超时。 1000毫秒,错误“cURL错误(28):超时已达”。的 这种行为的解释是: […] 解决方案是使用CURLOPT_NOSIGNAL禁用信号
资源
卷曲超时小于1000毫秒总是失败? http://www.php.net/manual/en/function.curl-setopt.php#104597 http://php.net/manual/en/features.connection-handling.php
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个HTTPS请求只需要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);
}
你可以在PHP中使用非阻塞套接字和pecl扩展之一:
http://php.net/event http://php.net/libevent http://php.net/ev https://github.com/m4rw3r/php-libev
您可以使用库,它为您的代码和pecl扩展之间提供了一个抽象层:https://github.com/reactphp/event-loop
您还可以使用基于前面库的异步http-client: https://github.com/reactphp/http-client
查看ReactPHP的其他库:http://reactphp.org
使用异步模型时要小心。 我推荐在youtube上看这个视频:http://www.youtube.com/watch?v=MWNcItWuKpI
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
下面是一个工作示例,只需运行它,然后打开storage.txt,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));