Writing multiple post requests using single connection - PHP - php

Question

I am writing to a server using the following snippet.
$fp = connect();
$sent_requests = 0;
function connect() {
$addr = gethostbyname("example.com");
$fp = fsockopen("$addr", 80, $errno, $errstr);
socket_set_blocking( $fp, false );
if (!$fp) {
echo "$errstr ($errno)<br />\n";
exit(1);
} else{
echo "Connected\n";
return $fp;
}
}
function sendTestCalls($load){
global $fp, $sent_requests;
if(!$fp){
echo "reconnecting";
$sent_requests = 0;
//echo stream_get_contents($fp) . "\n";
fclose($fp);
$fp = connect();
}
$data = "POST /test HTTP/2.0\r\n";
$data.= "Host: example.com\r\n";
$data.= "Content-Type: application/json\r\n";
$data.= "Content-Length: ".strlen($load)."\r\n";
$data.= "Connection: Keep-Alive\r\n";
$data.= "xYtU87BVFluc6: 1\r\n";
$data.= "\r\n" . $load;
$bytesToWrite = strlen($data);
$totalBytesWritten = 0;
while ($totalBytesWritten < $bytesToWrite) {
$bytes = fwrite($fp, substr($data, $totalBytesWritten));
$totalBytesWritten += $bytes;
}
$sent_requests++;
}
$time = time();
for($i=0; $i<1000; $i++) {
sendTestCalls('{"justtesting": "somevalue"}');
}
fclose($fp);
$time_taken = time() - $time;//might be a bit inaccurate
echo "Time Taken: " . $time_taken . "\n";
When I check my access logs on my server less than 1000 post requests are received (in the range of 0 to 900). What am I doing wrong here?
EDIT1
I suppose my socket is timing out. What should I do to check if it has disconnected in such a scenario reconnect. I tried using stream_get_meta_data($fp) but it had no effect.

Answer 1

Try to insert this before each request:
$info = stream_get_meta_data($fp);
if ($info['timed_out']) {
fclose($fp);
$fp = connect();
}

Answer 2

I had found a solution to this at that point using php_curl and KEEP-ALIVE
Here is my updated version:
function sendCall(&$curl_handle, $data){
curl_setopt($curl_handle, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($curl_handle, CURLOPT_POSTFIELDS, $data);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, true);
curl_setopt(
$curl_handle,
CURLOPT_HTTPHEADER,
array(
'Content-Type: application/json',
'Connection: Keep-Alive',
'Content-Length: ' . strlen($data)
)
);
$response = curl_exec($curl_handle); //Check response?
if($err = curl_error($curl_handle)) {
error_log("Error - $err Status - Reconnecting" );
$curl_handle = curl_init(curl_getinfo($curl_handle, CURLINFO_EFFECTIVE_URL));
sendCall($curl_handle, $data);
}
}
This function gives me an almost always alive connection. (Never got the error log in more than a week). Hope it helps anyone looking for the same.