[英]Multi Curl, error handling
我正在使用 multi Curl 並且想知道如何處理錯誤。 我想檢查發生了哪個錯誤,如果它是一個錯誤,例如超出速率限制我想在延遲一段時間后再次抓取該鏈接(睡眠())。 我的問題:“是否有內置函數可以為我執行此操作,還是我需要將所有 Url 收集到一個數組中並再次運行它們?”
這就是我現在所擁有的:
<?php
$urls = array( "https://API-URL.com",
"https://API-URL.com",
"https://API-URL.com",
"https://API-URL.com",
...);
//create the multiple cURL handle
$mh = curl_multi_init();
//Number of elements in $urls
$nbr = count($urls);
// set URL and options
for($x = 0; $x < $nbr; $x++){
// create both cURL resources
$ch[$x] = curl_init();
// set URL and other appropriate options
curl_setopt($ch[$x], CURLOPT_URL, $urls[$x]);
curl_setopt($ch[$x], CURLOPT_RETURNTRANSFER, true );
curl_setopt($ch[$x], CURLOPT_SSL_VERIFYPEER, false);
//add the two handles
curl_multi_add_handle($mh,$ch[$x]);
}
//execute the handles
do {
curl_multi_exec($mh, $running);
} while ($running);
for($x = 0; $x < $nbr; $x++){
$result = curl_multi_getcontent($ch[$x]);
$decoded = json_decode($result, true);
//get info about the request
$error = curl_getinfo($ch[$x], CURLINFO_HTTP_CODE);
//error handling
if($error != 200){
$again[] = array("Url" => $urls[$x], "errornbr" => $error);
} else {
// Here I do what ever I want with the data
}
curl_multi_remove_handle($mh, $ch[$x]);
curl_close($ch[1]);
}
curl_multi_close($mh);
?>
在第二個for循環中,當您循環瀏覽各個curl處理程序以檢查每個curl處理程序返回了什么內容時,希望這種方法可以回答您的問題
foreach ($ch as $key => $h) {
//This code is actually checking for any error that may occur, whatever that
//error is you can handle it in the if-part of the condition. and save those
//urls to the array $again to call them on a later stage.
if (curl_errno($h)) {
//this is how you will get complete information what did happened to the
//curl handler. And why did it fail. All the inforation will be stored in //error_info.
$again[] = array("Url" =>curl_getinfo($h, CURLINFO_EFFECTIVE_URL), "error_info" => curl_getinfo($h));
}
else{
//here you will handle the success scenario for each curl handler.
$responses[$key] = ['data' => curl_multi_getcontent($h)];
}
//remove curl handler as you are doing in the loop
}
對於多個句柄有https://www.php.net/manual/en/function.curl-multi-info-read.php
所以錯誤檢查(假設 http 連接)應該如下所示:
while ($a = curl_multi_info_read($mh))
{
if ($b = $a['result'])
{
echo curl_strerror($b);# CURLE_* error
}
elseif (!($b = curl_getinfo($a['handle'], CURLINFO_RESPONSE_CODE)))
{
echo 'connection failed';
}
elseif ($b !== 200)
{
echo 'HTTP status is not 200 OK';
}
}
將此代碼視為現代 PHP 的偽代碼(我沒有測試這個確切的變體,但方案會起作用)。 在添加到“multi”句柄的“easy”句柄上調用curl_errno()
將返回0
,這不是錯誤。
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