PHP - Remote Download/upload

On my website, I have a download folder containing several files ranging in size from 6Mb to 700Mb. Users have no problems downloading the smaller files but often have problems downloading the files over 500Mb. We also have an archive of all the files located on a sub-domain on a server in England. Those users that are having problems downloading large files from the main site usually have no problem downloading the large files if we send them the URL for the archive. I've added a button that calls the following script so the users can choose where to download from but have no idea how to code the script.

Here's what I've tried:

// ukdloader script
<?php

$php_scripts = '../../php/';
require $php_scripts . 'PDO_Connection_Select.php';
require $php_scripts . 'GetUserIpAddr.php';
function ukdloader($l_filename=NULL)

{
$ip = GetUserIpAddr();
if (!$pdo = PDOConnect("foxclone_data"))
{    
    exit;
}

    if( isset( $l_filename ) ) {  
        echo <a href="http://foxclone.org/".$l_filename">   /* This is the archive site */
        
        $ext = pathinfo($l_filename, PATHINFO_EXTENSION);
        $stmt = $pdo->prepare("INSERT INTO download (address, filename,ip_address) VALUES (?, ?, inet_aton('$ip'))");
        $stmt->execute([$ip, $ext]) ; 

        $test = $pdo->query("SELECT id FROM lookup WHERE INET_ATON('$ip') BETWEEN start AND end ORDER BY start DESC, end DESC");
        $ref = $test->fetchColumn();
        $ref = intval($ref);

        $stmt = $pdo->prepare("UPDATE download SET ref = '$ref' WHERE address = '$ip'");
        $stmt->execute() ;         
       }
        
    else {
        echo "isset failed";
        }  
}
ukdloader($_GET["f"]);
exit;

Thanks in advance.

Hi,

I'm writing some software and I'm wanting to store user statistics on my web-server remotely. My application outputs the statistics into a txt file and asks the user if they would like to submit this data to my server to help the project (statistics gathering  ) and if they submit it I want the information stored in a mysql database on my web-server. I was thinking about passing the data in through the url in an http request to the page, but there's too much data.

I'm interested in finding out if it's possible to upload a file directly to a php script. I could use FTP to place it on my server, but that would require me putting the ftp login into the program, which I don't feel safe about doing that. At least with a php script I'm able to filter and process any input before it's inserted into the database. Is it actually possible to upload directly to my server from a php file in an http request from an application though?

Hi guys,

I am trying to create a coding which allows users to upload and download files into mysql server, but I came across some errors. The coding itself works fine on the surface, but when I uploaded the file into mysql and download them, the contents of the downloaded file was different from the original file that was upload. One good example would be when I upload txt file or doc file. I was stuck on this for quite a few days without any leads.

Here are the codes:

index.html

<form action="add_file.php" method="post" enctype="multipart/form-data">
<input type="file" name="uploaded_file"><br>
<input type="submit" value="Upload file">
</form>
<p>
<a href="list_files.php">See all files</a>
</p>


add_file.php

<?php
// Check if a file has been uploaded
if(isset($_FILES['uploaded_file'])) {
// Make sure the file was sent without errors
if($_FILES['uploaded_file']['error'] == 0) {
// Connect to the database
$dbLink = new mysqli('localhost', 'root', 'pwd', 'myTable');
if(mysqli_connect_errno()) {
die("MySQL connection failed: ". mysqli_connect_error());
}

// Gather all required data
$name = $dbLink->real_escape_string($_FILES['uploaded_file']['name']);
$mime = $dbLink->real_escape_string($_FILES['uploaded_file']['type']);
$data = $dbLink->real_escape_string(file_get_contents($_FILES ['uploaded_file']['tmp_name']));
$size = intval($_FILES['uploaded_file']['size']);

// Create the SQL query
$query = "
INSERT INTO `file` (
`name`, `mime`, `size`, `data`, `created`
)
VALUES (
'{$name}', '{$mime}', {$size}, '{$data}', NOW()
)";

// Execute the query
$result = $dbLink->query($query);

// Check if it was successfull
if($result) {
echo 'Success! Your file was successfully added!';
}
else {
echo 'Error! Failed to insert the file'
. "<pre>{$dbLink->error}</pre>";
}
}
else {
echo 'An error accured while the file was being uploaded. '
. 'Error code: '. intval($_FILES['uploaded_file']['error']);
}

// Close the mysql connection
$dbLink->close();
}
else {
echo 'Error! A file was not sent!';
}

// Echo a link back to the main page
echo '<p>Click <a href="index.html">here</a> to go back</p>';
?>


list_files.php

<?php
// Connect to the database
$dbLink = new mysqli('localhost', 'root', 'pwd', 'myTable');
if(mysqli_connect_errno()) {
die("MySQL connection failed: ". mysqli_connect_error());
}

// Query for a list of all existing files
$sql = 'SELECT `id`, `name`, `mime`, `size`, `created` FROM `file`';
$result = $dbLink->query($sql);

// Check if it was successfull
if($result) {
// Make sure there are some files in there
if($result->num_rows == 0) {
echo '<p>There are no files in the database</p>';
}
else {
// Print the top of a table
echo '<table width="100%">
<tr>
<td><b>Name</b></td>
<td><b>Mime</b></td>
<td><b>Size (bytes)</b></td>
<td><b>Created</b></td>
<td><b>&nbsp;</b></td>
</tr>';

// Print each file
while($row = $result->fetch_assoc()) {
echo "
<tr>
<td>{$row['name']}</td>
<td>{$row['mime']}</td>
<td>{$row['size']}</td>
<td>{$row['created']}</td>
<td><a href='get_file.php?id={$row['id']}'>Download</a></td>
</tr>";
}

// Close table
echo '</table>';
}

// Free the result
$result->free();
}
else
{
echo 'Error! SQL query failed:';
echo "<pre>{$dbLink->error}</pre>";
}

// Close the mysql connection
$dbLink->close();
?>


get_file.php

<?php
// Make sure an ID was passed
if(isset($_GET['id'])) {
// Get the ID
$id = intval($_GET['id']);

// Make sure the ID is in fact a valid ID
if($id <= 0) {
die('The ID is invalid!');
}
else {
// Connect to the database
$dbLink = new mysqli('localhost', 'root', 'pwd', 'myTable');
if(mysqli_connect_errno()) {
die("MySQL connection failed: ". mysqli_connect_error());
}

// Fetch the file information
$query = "
SELECT `mime`, `name`, `size`, `data`
FROM `file`
WHERE `id` = {$id}";
$result = $dbLink->query($query);

if($result) {
// Make sure the result is valid
if($result->num_rows == 1) {
// Get the row
$row = mysqli_fetch_assoc($result);

// Print headers
header("Content-Type: ". $row['mime']);
header("Content-Length: ". $row['size']);
header("Content-Disposition: attachment; filename=". $row['name']);

// Print data
echo $row['data'];
}
else {
echo 'Error! No image exists with that ID.';
}

// Free the mysqli resources
@mysqli_free_result($result);
}
else {
echo "Error! Query failed: <pre>{$dbLink->error}</pre>";
}
@mysqli_close($dbLink);
}
}
else {
echo 'Error! No ID was passed.';
}
?>

I am not too sure where the error could be but I suspect that it could be somewhere at the add_file or get_file. Seriously hope someone could help me with this bug and thanks for the trouble.

Regards
Jasmine

Hi

I have to submit an assignment where a user can upload a file of the type "Application/octet" and the script should be able to split this file into multiples files of smaller sizes and display a page where the user can download the split parts. Also the files are not to stay on the webserver after they are downloaded.

Any recommendation or lead or even code pieces would be appreciated.

Regards,
GuddooSk.

Dear PHPFreak members,
I have been searching a solution for serving a file download via my website. The file to be downloaded is actually on a remote server.

What i need is a code that serves as a download medium without actually downloading the file to my web server. Something like masking file url 

Can anyone help me with it ???
Have been trying this since days. But no solution till date.