Question

<?php
set_time_limit(0);

$errorArr = array();
if (!isset($argv[1]))
{
    array_push($errorArr, "You forgot to enter a host.");
}
if ((isset($argv[1])) AND (!filter_var($argv[1], FILTER_VALIDATE_IP)))
{
    array_push($errorArr, "The host you entered is not a valid IP address.");
}
if (!isset($argv[2]))
{
    array_push($errorArr, "You forgot to select a port.");
}
if (!empty($errorArr))
{
    echo "You have the following errors:\n";
    print_r($errorArr);
    die("Syntax is as follows: php {$argv[0]} host port\n");
}

$host = $argv[1];
$port = $argv[2];

echo ":::Connecting...\n";
$fh = fsockopen($host, $port);
if (!$fh)
{
    die(":::Connection failed.\n:::Aborting.\n");
}
echo ":::Connected!\n:::Sending headers.\n";

$header = "PROPFIND /webdav/ HTTP/1.1\r\n";
$header .= "Host: {$host}\r\n";
$header .= "User-Agent: BitKinex/3.2.3\r\n";
$header .= "Accept: */*\r\n";
$header .= "Pragma: no-cache\r\n";
$header .= "Cache-Control: no-cache\r\n";
$header .= "Depth: 1\r\n";
$header .= "Content-Length: 220\r\n";
$header .= "Content-Type: text/xml\r\n\r\n\r\n";
if (!fwrite($fh, $header))
{
    die(":::Couldn't send headers. Aborting.\n");
}
$exHeader = explode("\r\n", $header);
foreach ($exHeader as $ecHeader)
{
    echo "<<<{$ecHeader}\n";
}
echo "\n:::Retrieving syntax...\n";
while(1)
{
    while ($data = fgets($fh, 512))
    {
        echo ">>>{$data}";
        flush();
    }
}
?>

I’m working on a script to connect to WebDAV, upload a file, and disconnect. It connects and sends headers fine, but then it takes forever to retrieve syntax. At times, it takes several minutes, and I can’t understand why. Is it a problem in my code?

And yes, I realize there’s an infinite while loop there. That’s done on purpose, because I haven’t figured out how to know when the server is done sending information to me. So I guess that’s another question, if anyone could provide insight to that.

Thanks

Answer 1

Your problem is because you are sending the Content-Length header with a value of 220, while not sending any content at all. The server hangs in there expecting content, but it never arrives…

And for your infinite loop thing, you don’t need it at all. fgets will return false if the connection has closed. Send the Connection: close header to tell Apache to end the connection after the data has been sent. Your while loop will evaluate to false when the data has been read entirely and the connection has closed, and your loop will exit.