I would like to create a locally persistent connection with my site.
I would like to create a single connection where I can exchange infinite messages.
I used the code below.
but it's really persistent? inside the "while" open (fsockopen) and close (fclose) the connection, but if I take them out of the "while" gives me problems.
$url="localhost/socket/socket.php";
$host=substr($url,0,strpos($url,"/"));
$req=substr($url,strpos($url,"/"));
$var=fopen("out.txt","a+");
while(1){
$fp = fsockopen($host, 80, $errno, $errstr, 30);
if ($fp) {
$data = "test=1";
$request = "POST ".$req." HTTP/1.1\r\n";
$request .= "Host: ".$host."\r\n";
$request .= "Content-Length: " . strlen($data) . "\r\n";
$request .= "Content-Type: application/x-www-form-urlencoded\r\n\r\n";
$request .= $data;
fwrite($fp, $request);
while (!feof($fp)) {
$json = fgets ($fp);
echo $json;
fwrite($var, $json);
}
}
sleep(10);
fclose($fp);
}
If you want a persistent connection you should use pfsockopen instead of fsockopen. Look here for more details.
Related
I'm trying to send a request to a remote server using the fire-and-forget approach. This is my code:
function backgroundPost($url, $data = array()){
$parts=parse_url($url);
$fp = fsockopen($parts['host'],
isset($parts['port'])?$parts['port']:80,
$errno, $errstr, 30);
if (!$fp) {
return false;
} else {
$encoded_data = json_encode($data);
$output = "POST ".$parts['path']." HTTP/1.1\r\n";
$output .= "Host: ".$parts['host']."\r\n";
$output .= "Content-Type: application/json\r\n";
$output .= "Content-Length: " . strlen($encoded_data) . "\r\n";
$output .= "Connection: Close\r\n\r\n";
$output .= $encoded_data;
fwrite($fp, $output);
fclose($fp);
return true;
}
}
//Example of use
backgroundPost('url-here', array("foo" => "bar"));
but the data that arrives is simply empty.
When I spin up the application locally and send the request to my own machine instead, the data does arrive.
Am I misunderstanding something about this pattern?
Why is it working when sending a request to my own machine but not a remote one?
Thanks!
I am trying to get a response from a URL using socket programming, but nothing is working correctly. I am using PHP, and I am told by the developer I am working with that I need to open a socket, send a request, and then I should get a JSON response. the $message is the string that needs to be sent in order to receive a response.
This is what I have tried so far...
$message = "api\tjson\tget\trooms\n";
$response = fsockopen("142.4.xxx.xxx", 5678);
fputs($response, $message);
fgets($response, 2048);
$data = json_decode($response, true);
And then I go on to parse the JSON response.
I have also tried,
$message = "api\tjson\tget\trooms\n";
$response = fsockopen("142.4.xxx.xxx", 5678);
fputs($response, $message);
socket_read($response, 2048, PHP_NORMAL_READ);
$data = json_decode($response, true);
But then I get an error stating that socket_read is not the correct resource. Any help would be appreciated.
You need to do some error checking, at least. Maybe this will help:
$message = "api\tjson\tget\trooms\n";
$response = fsockopen("142.4.xxx.xxx", 5678, $errno, $errstr, 30);
if (!$response) {
echo "$errstr ($errno)<br />\n";
} else {
$out = "POST /script.php HTTP/1.1\r\n";
$out .= "Host: www.webste.com\r\n";
$out .= "Content-Type: application/x-www-form-urlencoded\r\n";
$out .= 'Content-Length: ' . strlen($message) . "\r\n\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($response, $out);
fwrite($response, $message);
while (!feof($response)) {
echo fgets($response, 128);
}
fclose($response);
}
i want to send post variables with fsock,
but when i try this:
$post_arr = array ("a" => "b");
$addr = 'http://1.2.3.4/confirmation.html';
$fp = fsockopen($addr, 80, $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else {
$req = '';
foreach ($post_arr as $key => $value) {
$value = urlencode(stripslashes($value));
$req .= "&" . $key . "=" . $value;
}
$header = "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";
fwrite($fp, $header);
while (!feof($fp)) {
echo fgets($fp, 128);
}
fclose($fp);
}
I get 'Unable to find the socket transport "http" ',
any ideas why?
fsockopen() opens a socket. Sockets do not know anything about Layer5+ protocols such as HTTP.
$fp = fsockopen('1.2.3.4', 80, $errno, $errstr, 30);
To request a certain path, send it in the request: GET /confirmation.html
To specify the domain, send it in the Host header: Host: 1.2.3.4
You might want to consider using the curl extension. There is usually no good reason to build HTTP requests manually in PHP.
I am trying to post parameters from php to another server. When creating the link manually and opening it in the browser it works fine. But when trying to do it from my php-script it doesn't work. The file I am accessing is accessed, but the parameter is not posted.
I guess the problem has to do with how I define and post the parameter ($post_data .= "?companyid=banane";). What is my problem and how do I solve it?
<?php
$fp = fsockopen("192.168.1.102", 80, $errno, $errstr, 30);
error_log("write done");
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else {
$post_data = "GET /cgi-bin/new_instance.pl HTTP/1.1\r\n";
$post_data .= "Host: 192.168.1.102\r\n";
$post_data .= "Connection: Close\r\n\r\n";
$post_data .= "?companyid=banane";
error_log("OUT - - - ".$post_data);
fwrite($fp, $post_data);
error_log("write done");
while (!feof($fp)) {
echo fgets($fp, 128);
}
fclose($fp);
}
?>
Or am I using the wrong approach? I'm thinking, if this is the correct approach then I should be able to find some good examples when googling around.
Try this as the first line instead:
GET /cgi-bin/new_instance.pl?companyid=banane HTTP/1.1\r\n
i need to telnet to a port and send command and write the output into a txt file using PHP.How i do it?
in this forum have a same question name telnet connection using PHP but their have a solution link and the solution link is not open so i have to make the question again.
Also i try the code below from php site but it does not save the proper output into a text file.Code:
<?php
$fp = fsockopen("localhost", 80, $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else {
$out = "GET / HTTP/1.1\r\n";
$out .= "Host: localhost\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
while (!feof($fp)) {
echo fgets($fp, 128);
}
fclose($fp);
}
?>
So,please help me to solve the problem.How i telnet to localhost port 80 and send command GET / HTTP/1.1 and write the output into a text file?
With a simple additition, your example script can write the output to a file, of course:
<?php
$fp = fsockopen("localhost", 80, $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else {
$out = "GET / HTTP/1.1\r\n";
$out .= "Host: localhost\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
$output = '';
while (!feof($fp)) {
$output .= fgets($fp, 128);
}
fclose($fp);
file_put_contents( 'output.txt', $output );
}
Then again, I agree with Eduard7; it's easier not to do the request manually and just let PHP solve it for you:
<?php
// This is much easier, I imagine?
file_put_contents( 'output.txt', file_get_contents( 'http://localhost' ) );
You really want to do this with telnet? What about:
echo file_get_contents("http://127.0.0.1:80");
Or if You want to customize the request, you can use cURL - http://php.net/manual/en/book.curl.php