curl timeout less than 1000ms always fails?
connection-timeout, curl, php
Solution
from: http://www.php.net/manual/en/function.curl-setopt.php
The number of milliseconds to wait while trying to connect. Use 0 to wait indefinitely. If libcurl is built to use the standard system name resolver, that portion of the connect will still use full-second resolution for timeouts with a minimum timeout allowed of one second.
Problem
This code always fails (i.e., `$result` is Boolean `false`): ``` $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $path); curl_setopt($ch, CURLOPT_HEADER, TRUE); curl_setopt($ch, CURLOPT_NOBODY, TRUE); curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); $curl_version = curl_version(); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT_MS, 999); $result = curl_exec($ch); curl_close($ch); ``` This code always succeeds (i.e., `$result` is a string containing the header): ``` $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $path); curl_setopt($ch, CURLOPT_HEADER, TRUE); curl_setopt($ch, CURLOPT_NOBODY, TRUE); curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); $curl_version = curl_version(); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT_MS, 1000); $result = curl_exec($ch); curl_close($ch); ``` The only difference is that I've changed the timeout from 999ms to 1000ms. This must be either a bug in curl or some sort of minimum in the documentation for connection timeouts that I missed. Which is it? My money is on the latter.