Download and save to server

[brainlag]

I'm trying to download an image and save it to my server. The image is to be stored in cache to be further manipulated, but I'm having a problem getting the file to download to the directory. The file shows up in the directory, but it's a 0 byte file and contains no data.

I'm using a patchwork of scripts. This is mainly part of one file that works OK for text, but it's giving me problems for images. I'm a php idiot really and need some help, since I really have no idea what I'm doing. If anyone has any insight, it would be appreciated.

<?php   //WIND @ FBIS1 WOHOO

 $stationNumber = "TR";
 $stationName = "TR";
 $maxReadings = 1;
 $backend = "https://www.fnmoc.navy.mil/products/WW3/ww3.b.natl.sig_wav_ht.000.gif";
 $cache_file = "tmp/buoydata.".$stationName.".gif";
 $timeout = 10;
// # Cache file time-based naming stuff
 $cache_time = 21600; #Images are only updated every 4 hours so cache the current reading until the next is available
 $time = split(" ", microtime());
 srand((double)microtime()*1000000);
 $cache_time_rnd = 300 - rand(0, 600);
 if ( (!(file_exists($cache_file))) || ((filectime($cache_file) + $cache_time - $time[1]) + $cache_time_rnd < 0) || (!(filesize($cache_file))) ) {

$url = parse_url($backend);
$fp = fsockopen($url['host'], "443", &$errno, &$errstr, $timeout);
if(!$fp) {
	echo "NO DATA";
	return;
} else {
	$fpread = @fopen($backend, 'r');

	if(!$fpread) {
		echo "Buoy Down";
		return;
	} else {
		$fpwrite = @fopen($cache_file, 'w');
		if(!$fpwrite) {
			echo "Cache Error";
			return;
		} 	
		fclose($fpread);
	}
	fclose($fpwrite);
}
fclose($fp);
 }
 if (file_exists($cache_file)) {
 	include($cache_file);
 }

?> 

[drew010]

you open a socket with fopen, but you never make any request, so no data is being sent back. also if you want to use ssl, its easier to use [man]curl[/man]

[brainlag]

If it can be done with the above, that would be much easier as I "somewhat" 'get' what is happening, but obviously, I don't get it very well.

Are there any code examples which do what I seek? I read curl, get_contents, and a miriad of other commands and I end up being nothing but confused.

[drew010]

simple example of fetching a file with curl is this:

<?php

$url = 'https://www.site.com/file.ext';

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
$data = curl_exec($ch);

echo $data;  //this is the file contents
?>

or fsockopen....

<?php

$host = 'www.site.com';
$file   = '/file.ext';

$fp = @fsockopen("ssl://$host", 443, $errno, $errstr, 30);
if (!$fp) die("$errno: $errstr");

fputs($fp, "GET $file HTTP/1.0\r\n"
               ."Host: $host\r\n"
               ."Connection: Close\r\n\r\n");

$data = '';
while (!feof($fp)) {
  $data .= fgets($fp);
}

echo $data;  //this is the file contents.
?>

www.php.net/fsockopen
www.php.net/curl
www.php.net/fopen
www.php.net/file_get_contents

[brainlag]

The above curl method produced no results for the url, just a blank page.

The fsockopen method returned

25: Inappropriate ioctl for device

I don't know on which side this error is generated.

[drew010]

what if you do

<?php

$ch = curl_init('http://www.google.com/');

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$data = curl_exec($ch);

curl_close($ch);

echo $data;

?>

the thing about fsockopen is server side. most likely means it cannot use the ssl or couldnt connect due to socket limitations.