Bug #80518 [Com]: CURLOPT_READFUNCTION stream can't rewind

Edit report at https://bugs.php.net/bug.php?id=80518&edit=1 ID: 80518 Comment by: malacca42 at gmail dot com Reported by: malacca42 at gmail dot com Summary: CURLOPT_READFUNCTION stream can't rewind Status: Open Type: Bug Package: cURL related Operating System: windows PHP Version: 8.0.0 Block user comment: N Private report: N New Comment: replace CURLOPT_READFUNCTION to CURLOPT_INFILE still has same issue Test script: --------------- $file = __DIR__.'/payload'; $fp = fopen($file, 'r'); $ch = curl_init('http://localhost/server.php'); curl_setopt_array($ch, [ CURLOPT_VERBOSE => true, CURLOPT_CUSTOMREQUEST => 'PUT', CURLOPT_FOLLOWLOCATION => true, // follow location CURLOPT_UPLOAD => true, CURLOPT_INFILESIZE => filesize($file), CURLOPT_INFILE => $fp, ]); curl_exec($ch); curl_close($ch); result: ------------ also got "necessary data rewind wasn't possible" Previous Comments: ------------------------------------------------------------------------ [2020-12-15 09:19:20] malacca42 at gmail dot com Description: ------------ CURLOPT_READFUNCTION stream can't rewind Test script: --------------- $file = __DIR__.'/payload'; $fp = fopen($file, 'r'); $ch = curl_init('http://localhost/server.php'); curl_setopt_array($ch, [ CURLOPT_VERBOSE => true, CURLOPT_CUSTOMREQUEST => 'PUT', CURLOPT_FOLLOWLOCATION => true, // follow location CURLOPT_UPLOAD => true, CURLOPT_INFILESIZE => filesize($file), CURLOPT_READFUNCTION => function ($ch, $fd, $length) use ($fp) { return fread($fp, $length); }, ]); curl_exec($ch); curl_close($ch); ---------- the "server.php" is very simple if (isset($_GET['n'])) { echo file_get_contents('php://input'); } else { Header("Location: sever.php?n=1"); http_response_code(307); } Expected result: ---------------- server can read payload after redirect as RFC, entity body will resend after response 307 redirect https://tools.ietf.org/html/rfc7231#section-6.4 but CURLOPT_READFUNCTION function only read once maybe php lost CURLOPT_SEEKFUNCTION option https://curl.se/libcurl/c/CURLOPT_SEEKFUNCTION.html One more thing: this is very very slow using php8, php7 is fast Actual result: -------------- got issue "necessary data rewind wasn't possible" ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80518&edit=1