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php3-list | 199908

[PHP3] fgets and NULL chars From: Adam Whitehead (adam <email protected>)
Date: 08/02/99

Hi,

I am having a problem with NULL characters in the response from HTTP servers.

I am requesting the last 128 bytes of a file from the server using the
Range: bytes=-128
header.

This works flawlessly except for responses which contains NULL characters (and
they often do, because the files being requested are binary files). The
value I am returning
at the end ($id3) has all of the response up until the first null char
instead of the full 128
bytes. I think the problem is with using string-based functions here. If
anyone can help out
by converting this to something which will work with NULL characters, I'd
greatly appreciate it
-- I've tried and haven't got very far.

Here is the code I'm using to get the response:

     $sock = fsockopen($server_address,$server_port);

     if ($sock)
     {
       fputs($sock,"GET $request_path HTTP/1.1\r\n");
       fputs($sock,"Host: $server_address\r\n");
       fputs($sock,"User-Agent: $agent\r\n");
       fputs($sock,"Accept: */*\r\n");
       fputs($sock,"Range: bytes=-128\r\n");
       fputs($sock,"Connection: close\r\n\r\n");

       $response = fgets($sock,128);

       $response = "_$response"; /* To prevent strpos() false negative. */

       if (!strpos($response,"HTTP/1.1"))
         return -1;

       while ($buf = fgets($sock,4096))
         $response = $response . $buf;

       fclose($sock);
     }
     else
       return -1;

     if (!$response)
       return -1;

     $firstline = substr($response,0,strpos($response,"\n"));

     if (!strpos($firstline,"206"))
       return -1;

     if(!($scl = strpos($response,"Content-Type: ")))
       $scl = strpos($response,"Content-type: ");

     if(!$scl)
       return -1;

     $ps = strpos($response,"\n",$scl);
     $id3 = substr($response,$ps+3);

     if (substr($id3,0,3) != "TAG")
       return -1;

     if (!$id3)
       return -1;

     return $id3;

Regards,
Adam Whitehead
CEO - Netherworld Media
E-mail: adam <email protected>
Phone: +61 (889) 279 898
FAX: +61 (889) 273 889
Mobile: +61 (411) 241 120
Musicseek (http://www.musicseek.net) 

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