/s3db3.5.10/s3dbcore/acceptFile.php

<?php

function put_the_frag_on_frag_file($F)

{

extract($F);



#Create the next var to compare with the nr of fragments that have been inserted

$next = find_next_frag($F);



	if($next == $thisfrag)

		{ 

		

			if (fwrite($fid, $fileStr))

			{

			file_put_contents($indname, $next+1);

			chmod($indname, 0777);

			$res .= 'Frag '.$thisfrag.' inserted. ';	

			

			#If this was the last fragment, and it was inserted correctly, delete the index and decode the whole file

				if($thisfrag == $totalfrag) 

				{

					unlink($indname);

				}



			

			}

			else

			$res .= '</report>Frag '.$thisfrag.' failed. Error writting to file</report>';

		}

	else echo "</report>Waiting for frag ".$next."</report>";

	

return $res;

}



function check_filekey_validity($filekey, $db)

{

		#$db = $_SESSION['db'];

		#$sql = "select * from s3db_file_transfer where filekey='".$filekey."' and expires>='".date('Y-m-d G:i:s')."'";

		$sql = "select file_id from s3db_file_transfer where filekey='".$filekey."'";

		$db->query($sql, __LINE__, __FILE__);

	

		if($db->next_record())

		{

			return TRUE;

		}

		else return FALSE;

	   

}





function put_the_frag_on_file($F)

{

extract($F);



#Create the next var to compare with the nr of fragments that have been inserted

$next = find_next_frag($F);

	

	if($next == $thisfrag)

		{ 

		

			if (fwrite($fid, $fileStr))

			{

			file_put_contents($indname, $next+1);

			chmod($indname, 0777);

			$msg = 'Frag '.$thisfrag.' inserted. ';	

			

			#If this was the last fragment, and it was inserted correctly, delete the index and decode the whole file

				if($thisfrag == $totalfrag) 

				{

					unlink($indname);

				}



			

			}

			else

			$msg = 'Frag '.$thisfrag.' failed. Error writting to file';

		}

	else {$msg= "Waiting for frag ".$next."";

	}

return $msg;

}





function find_next_frag($F)

{

extract($F);



if (!is_file($indname)) 

	{$indname = file_put_contents($indname, '0');

	$next = '1';

	}



else 

	{

	$next = file_get_contents($indname);

	}

	return $next;

}





function acceptFrag($F)



{

extract($F);



$next = file_get_contents($ind);	



$fin = fopen($filelocation, 'a+');



echo base64_decode($fileStr);

#Decide which fragment will go next

if($next!='')

	{

	if ($next+1!=$thisfrag)

		{

			echo "Waiting for fragment ".($next+1)."<BR>";

		}

	else #Means index file corresponds to correct fragment

		{

		

		if(fwrite($fin, base64_decode($fileStr)))

			{

			$next=$next + 1; #do the ind file couting independently from the fragNr

			file_put_contents($ind, $next); #increment the fragment on the index file

			$percent = $thisfrag*100/$lastfrag;

			#$progress = '<IMG SRC="progBar.jpg" WIDTH="'.$next*$FragWidth.'0" HEIGHT="20" BORDER="0" ALT="">'.intval($percent).'%';

			echo "Fragment ".$thisfrag." inserted";

			echo intval($percent).'%';

			#fclose($fin);

			return TRUE;

			}

		else

			{echo "Could not write frament ".$thisfrag." to file.";}

		}

	}	

}



function receiveFileFragments($F)

{	

	extract($F);

	

	$filekey_valid = check_filekey_validity($filekey, $db);

	

	if ($filekey_valid)

	{

	

	#Get the information about the file from the table

	$file_id = get_entry("file_transfer", "file_id", "filekey", $filekey, $db);

	$filesize = get_entry("file_transfer", "filesize", "filekey", $filekey, $db);

	$originalname = get_entry("file_transfer", "filename", "filekey", $filekey, $db);

	

	#list($name, $extension) = explode('.', $originalname);

	ereg('([A-Za-z0-9]+)\.*([A-Za-z0-9]*)$',$originalname, $tokens);

	

	$name = $tokens[1];

	$extension= $tokens[2];

	

	#$name = ereg_replace('.([A-Za-z0-9]*)$', '', $originalname);

	

	if($fragNr=='')

	$fragNr =  $_REQUEST['fragNr'];

	

	list($thisfrag, $totalfrag) = explode('/', $fragNr);

	

		

	#Define the folder where these files will be stored

	$folder = $GLOBALS['s3db_info']['server']['db']['uploads_folder'].$GLOBALS['s3db_info']['server']['db']['uploads_file'].'/tmps3db/';

	

	$filename = $folder.$file_id.'_'.$thisfrag.'.tmp';

	$final = $folder.$file_id.'.'.$extension;

	

	

	if($fileStr=='')

	$fileStr = $_REQUEST['fileStr'];

	

	#decode the fragment right after receiving them if they were encoded one at a time

	if ($_REQUEST['encode']=='2') {

		$fileStr = base64_decode($fileStr);

	}



	$indname = $folder.'ind'.$file_id.'.txt';

	$fid = fopen($filename, 'a+');

	chmod($filename, 0777);

	

	

	if($fragNr=='' || $fileStr=='')

		{ $msg= "Syntax: uploads.php?filekey=[filekey]&fragNr=x/Total&fileStr=[encoded as base 64 fragment string]&encode=1<BR>";

		#echo "&lt;filekey&gt;...&lt;/filekey&gt;<BR>";

		#echo "&lt;fragNr&gt;[this frag]/[total nr of frags]&lt;/fragNr&gt;<BR>";

		#echo "&lt;fileStr&gt;(hexadecimal encoded fragment string)&lt;/fileStr&gt;<BR>";

		#echo "</report>";

		}

	else

		{if($filesize!='' && filesize($filename)==$filesize) $msg.="This file was already uploaded";

		elseif ($thisfrag > $totalfrag)

		$msg= "Too many fragments";

	else

	{

		$F = compact('thisfrag', 'fileStr', 'totalfrag', 'fid', 'filename', 'indname', 'final');

		#echo '<pre>';print_r($F);

		

		$msg=put_the_frag_on_file($F);

		

		#echo $thisfrag.' out of'.$totalfrag;

		#When the last fragment is in, decode the entire file

		if($thisfrag == $totalfrag)

		{

		

		#find all the fragment files in the folder,  write them in the final file

		for($i=1;$i<=$totalfrag;$i++)

			{

			$fragment_file_name = $folder.$file_id.'_'.$i.'.tmp';

					

			if(is_file($fragment_file_name))

				{

				

				if(file_put_contents($folder.$file_id.'.tmp', file_get_contents($fragment_file_name),FILE_APPEND))

				unlink($fragment_file_name);

				}

				else

				{return $msg= "Fragment ".$i." is missing, please upload it again.";

				

				}

			

			

			}

		#decode the file in the end, if the user requested it

		if($_REQUEST['encode']!='2') #if encoding is to be done after getting the file.Empty is default to be backward compatible; other wise, the data on the tmp file is already decoded

			{

			$fullStr =  file_get_contents($folder.$file_id.'.tmp');

		

			$decodedStr = base64_decode($fullStr);

			

			if (!file_put_contents($folder.$file_id.'.tmp', $decodedStr)) {

				return $msg = "Failed accepting the file. Please try again or encode file one fragment at a time before sending.";

				

			}

			}

		

		

		

		copy($folder.$file_id.'.tmp', $final);

		chmod($final, 0777);

		

		

		if(is_file($folder.$file_id.'.tmp')) #delete the temporary key

			{

			unlink($folder.$file_id.'.tmp');	

			}

		

		

		return $msg."Upload Complete";

		

		}

		else

		{	

		fclose($fid);

		

		}



	}

	



	}

	}

 return ($msg);



}



function generateAFilekey($F)

{#this function accepts user input with key and filename and puts an entry on the file_transfer table 

extract($F);

	$filekey = random_string("12");

	$file_id = str_replace (array('.', ' '),'', microtime());



	#Insert the entry on file_trasnfer table

	$day = date('d')+1;

	$expires = date('Y-m-d G:i:s', mktime(date('G'),date('i'),date('s'), date('m'), $day, date('Y')));

	$file = array('file_id'=>$file_id, 'filename'=>$filename, 'filesize'=>$filesize, 'expires'=>$expires, 'filekey'=> $filekey, 'status'=>'empty');

	list($name, $extension) = explode('.', $filename);

	

	



	#Insert the file_id in the file_transfer_table to be associated with the output file

	$transfer = insert_file_for_transfer($file, $user_id, $db);

	if($transfer)

	return $filekey;

	

}





?>