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Multiple requests with a single socket using fsockopen and ssl.

Posted on 2008-06-23
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Last Modified: 2013-12-25
I am writing a time sensitive script to submit socket-based (XML) requests at a certain time, in competition with other people running similar scripts.  There are time limits on how often I can send requests and a limit that I can only have one connection open at a time.  This leads me to belive that it's possible to have more than one request per connection. Is this correct? if so, how do I implement it?

Or, is it the case that a socket always get closed when a response is sent?

My best guess at implementation is below, but feels far from right.

Thanks!

$fp = fsockopen(example.com, 443);
 
$out = "GET /page1.html HTTP/1.1\r\n";
$out .= "Host: https://example.com\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
  while (!feof($fp)) {
  echo fgets($fp, 128);
}
 
 
$out = "GET /page2.html HTTP/1.1\r\n";
$out .= "Host: https://example.com\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
  while (!feof($fp)) {
  echo fgets($fp, 128);
}
 
fclose($fp);

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Question by:mohrc
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3 Comments
 
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Expert Comment

by:virmaior
ID: 21855792
I don't believe what you are doing will work..

it would depend on how their socket is coded.

At the very least, you will need to send an EOF (or equivalent device) to tell it when to end a statement.  

As written, you are not signaling the server that a new request is being made so the subsequent requests will not work.
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LVL 51

Accepted Solution

by:
ahoffmann earned 250 total points
ID: 21868300
> $fp = fsockopen(example.com, 443);
are you "speaking" plain text on a SSL port? Just wondering?

Back to you question:
> .. it's possible to have more than one request per connection.
yes, use:

$out .= "Connection: keep-alive\r\n\r\n";


but depends on the server if it allows it.
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