Trying to download a jpg file from a remote host

[sapoxgn]

Hi all, i m trying to download a jpg file from a remote http host, i can download the file.. the problem is to strip the headers and write just the file to disk.. anyone can help me with this? here is my code:

$fp = fsockopen("www.fr.xgn.com.br", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "Error: $errstr ($errno)<br \>\n";
} else {
	fputs($fp, "GET /img/4237c9c4e7f0a.jpg HTTP/1.0\r\nHost: www.fr.xgn.com.br\r\n\r\n");
	while (!feof($fp)) {
		$buffer .= fgets($fp);
  }
	fclose($fp);
#  preg_match('/Content-Length: ([0-9]+)/', $buffer, $parts);
#  $final = substr($buffer,-$parts[1]);
#  print_r($parts);
  if($destino = fopen("image.jpg", "w+")) {
	  if(fwrite($destino,$buffer)) {
  		echo "File saved!";
	  } else {
  		echo "Cannot write to file!";
	  }
	} else {
		echo "Cannot create file!";
	}
}

Using it this way, it outputs like this:

HTTP/1.0 200 OK
Age: 61296
Accept-Ranges: bytes
Date: Thu, 02 Feb 2006 01:29:34 GMT
Content-Length: 29474
Content-Type: image/jpeg
Server: Apache/1.3.33 (Unix) mod_auth_passthrough/1.8 mod_log_bytes/1.2 mod_bwlimited/1.4 PHP/4.3.11 FrontPage/5.0.2.2635 mod_ssl/2.8.22 OpenSSL/0.9.7a
Last-Modified: Wed, 16 Mar 2005 05:53:08 GMT
ETag: "63c340-7322-4237c9c4"

ÿØÿà JFIF      ÿþ >CREATOR: gd-jpeg v1.0 (using IJG JPEG v62),

I want to strip those stupid headers.. any ideas? I tryied to using the Content-Lenght (look at the commented lines) but that cut the beggining of the jpg file with the headers.. so i m out of ideas 🙁

[crazychris]

Headers should always end with a blank line, so when you detect one, all of the remaining lines are gold.

[sapoxgn]

crazychris wrote:

Headers should always end with a blank line, so when you detect one, all of the remaining lines are gold.

Hm.. i m not sure how i can do this.. :bemused:

[crazychris]

untested code follows:

$buffer="";
$fillbuffer=false;
while (!feof($fp)) { 
	if ($fillbuffer) {
		$buffer .= fgets($fp);
	} else {
		if (!trim(fgets($fp))) {
			$fillbuffer=true;
		}
	}
}

Will start filling $buffer after a blank line occurs

[samudasu]

You can also use curl if it's enabled in your server.

$ch = curl_init('http://pathtoimage/image.jpg');
$fp = fopen('newimage.jpg', 'wb');
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_exec($ch);
curl_close($ch);
fclose($fp);

[sapoxgn]

crazychris wrote:

untested code follows:

$buffer="";
$fillbuffer=false;
while (!feof($fp)) { 
	if ($fillbuffer) {
		$buffer .= fgets($fp);
	} else {
		if (!trim(fgets($fp))) {
			$fillbuffer=true;
		}
	}
}

Will start filling $buffer after a blank line occurs

thanx man.. this worked like a charm 😃

[sapoxgn]

Thanx for you help guys, i made a function with all that dirty code.. if someone wants to, feel free to use 🙂

<?php
function http_get($fonte, $destino) {
	$parts = explode('/',$fonte);
	$nparts = count($parts);
	for($i=0; $i <= $nparts; $i++) {
		if($i == 0)
			$host = $parts[$i];
		else
			$arquivo .= "/" . $parts[$i];
	}
	$arquivo = substr($arquivo, 0, strlen($arquivo) - 1);
	$fp = fsockopen($host, 80, $errno, $errstr, 30);
	if (!$fp) {
  	  echo "Erro: $errstr ($errno)<br \>\n";
  	  return false;
	} else {
		fputs($fp, "GET " . $arquivo . " HTTP/1.0\r\nHost: " . $host . "\r\n\r\n");
		$fillbuffer = false;
		while (!feof($fp)) {
			if ($fillbuffer) {
				$buffer .= fgets($fp);
			} else {
				if (!trim(fgets($fp))) {
					$fillbuffer = true;
				}
			}
		}
		fclose($fp);
	  if($destino = fopen($destino, "w+")) {
		  if(fwrite($destino,$buffer)) {
  			return true;;
		  } else {
		  	echo "Erro ao gravar arquivo local!<br />\n";
  			return false;
	  	}
		} else {
		  	echo "Erro ao criar arquivo local!<br />\n";
			return false;
		}
	}
}
#USANDO A FUNÇÂO:
$fonte = "www.fr.xgn.com.br/img/4237c9c4e7f0a.jpg";
$destino = "teste.jpg";
if(http_get($fonte, $destino))
	#TESTANDO O ARQUIVO LOCAL
	echo '<img src="' . $destino . '" />';
?>

btw.. anyone could help me write a regular expression to do this stuff:

	$parts = explode('/',$fonte);
	$nparts = count($parts);
	for($i=0; $i <= $nparts; $i++) {
		if($i == 0)
			$host = $parts[$i];
		else
			$arquivo .= "/" . $parts[$i];
	}
	$arquivo = substr($arquivo, 0, strlen($arquivo) - 1);

I need to get the host and the file in separate vars.. anyone could help me with this? i think is simple but i m really n00b at regexp, thanx 🙂