I'm trying to write a script to download a file. But when I click "Download" nothing happens. I'm using Laravel for my project. This is the function:
public function downloadUserFile(){
$userid = Auth::id();
$result = $_POST['filename'];
$query = File::where('filename', $result)->where('userid', $userid)->get();
foreach($query as $queryResult){
$mimeType = $queryResult->mimetype;
$filepath = $queryResult->filePath;
$filesize = $queryResult->filesize;
if (file_exists($filepath)) {
header('Content-Description: File Transfer');
header('Content-Type: ' . $mimeType);
header('Content-Disposition: attachment; filename="'.basename($filepath).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . $filesize);
ob_clean();
flush();
readfile($filepath);
exit;
}
}
}
And the ajax:
if(key === "download") {
var classElements = document.querySelectorAll("tr.ui-selected td.filename");
var csrf = $('input[name=_token]').val();
for(var x = 0;x < classElements.length;x++){
var result;
result = classElements[x].innerHTML;
$.ajax({
async: true,
method: 'POST',
url: '../public/downloadfile',
data: { filename: result, "_token": csrf }
});
};
}
The ajax response and the PHP don't give me errors and I can't understand why nothing actually happens. What could be the problem?
Related
I have a webpage that displays a list of my local files, and I have a search bar that goes through the list of files and highlights the first match.
However, how can I display the files only when a user searches for a filename. So instead of all the files showing, I'd only like the files that match the search criteria to be returned.
PHP, JavaScript, jQuery is totally an option here if anyone can help in that area.
testexec.php:
<?php
$path = '/var/www/html/'; //get list of files
$files = scandir($path);
//display the links
foreach($files as $file) {
if($file != '.' && $file != '..') {
echo '<div> '.$file.'</div>';
}
}
?>
readfile.php:
<?php
// PHP script to allow the file to be downloaded
$filename = $_GET['file'];
if (file_exists($filename)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment;
filename="'.basename($filename).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($filename);
exit;
}
?>
//JavaScript for searchbar
function FindNext() {
var str = document.getElementById ("livesearch").value;
if (str == "") {
alert ("Please enter some text to search!");
return;
}
var supported = false;
var found = false;
if (window.find) { // Firefox, Google Chrome, Safari
supported = true;
// if some content is selected, the start position of the search
// will be the end position of the selection
found = window.find (str);
} else {
if (document.selection && document.selection.createRange) { // Internet Explorer, Opera before version 10.5
var textRange = document.selection.createRange ();
if (textRange.findText) { // Internet Explorer
supported = true;
// if some content is selected, the start position of the search
// will be the position after the start position of the selection
if (textRange.text.length > 0) {
textRange.collapse (true);
textRange.move ("character", 1);
}
found = textRange.findText (str);
if (found) {
textRange.select ();
}
}
}
}
if (supported) {
if (!found) {
alert ("The following text was not found:\n" + str);
}
}
else {
alert ("Your browser does not support this example!");
}
}
This is the simplest idea.
Frontend
index.html
$('input').keydown(function(e) {
var str = $(this).val();
alert(str);
$.get("/search.php?query=" + str, function(data) {
$('.result').html(data);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h3>File search and download</h3>
<input name="filename" placeholder="file name" class="kw"/>
<div class="result">
</div>
Backend
search.php
<?php
// You need code search file
// after search $files
$str = '';
foreach($files as file) {
$str .= ''.$file.' <br>'
}
return $str;
?>
readfile.php
<?php
// PHP script to allow the file to be downloaded
$filename = $_GET['file'];
if (file_exists($filename)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment;
filename="'.basename($filename).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($filename);
exit;
}
?>
this really easy. you just need to use event keyup and some code fix
index.php
<input type="text" id="searchbar" placeholder="search file"> <span id="loading" style="display:none;">loading</span>
<div id="result"></div>
<script src="../../vendor/jquery/jquery-3.2.1.min.js"></script>
<script>
$(function(){
$('#searchbar').keyup(function(){//event after user release keyboard
var val = $(this).val();
if(val.length >= 2){//min 2 words to start find
$.ajax({
url: 'search.php',
type: 'POST',
dataType: 'json', //we use json
data: {keyword: val},
beforeSend: function(){
$('#loading').show();
},
success: function(d){
if(d.ok==1){
$('#result').html(d.list);
}else{
alert(d.msg);
}
$('#loading').hide();
},
error: function(d){
alert('error');
$('#loading').hide();
}
});
}
})
});
</script>
search.php
<?php
$path = 'C:/xampp/htdocs/';
$keyword = isset($_POST['keyword']) ? $_POST['keyword'] : '';
$scan = scandir($path);
$result = array('ok'=>0); //prepare output cz we will use json instead text/html
if($scan !== false){
$result['ok']=1;
$list = array();
foreach($scan as $file){
if(is_file($path.$file)){ //only file
if(preg_match('/'.$keyword.'/', $file)) //is file containts keyword?
$list[] = '<div>'.$file.'</div>';
}
}
$result['list'] = count($list) == 0 ? 'no file match': $list;
}else
$result['msg'] = "failed open dir";
echo json_encode($result);
readfile.php
<?php
// PHP script to allow the file to be downloaded
$filename = $_GET['file'];
$path = 'C:/xampp/htdocs/';
$fullPath = $path.$filename; //you need this
if (file_exists($fullPath)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($filename).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($fullPath));
readfile($fullPath);
exit;
}
?>
There are many ways to do that.
I would suggest that:
Make your PHP answer a JSON with the files that match a given criteria. So you will ask to the PHP, passing in POST data ou QUERY string the "text" that is being search. It will give you only the files that matches.
In you html file (could be another PHP as well), you will call ajax (you can use jQuery) to the page above everytime user changes the search text. It's good thing to "throttle" (see lodash/underscore library) (wait some time waiting for more key presses).
After receiving the JSON with the files that matches, build dynamically you table (or another way you want).
search.php:
<?php
header('Content-Type: application/json');
$path = '/var/www/html/'; //get list of files
$files = scandir($path);
$search = $_GET['search'];
$links = array();
foreach ($files as $file) {
if($file != '.' && $file != '..' && strpos(strtolower($file), strtolower($search)) !== false) {
array_push($links, array(
"name" => $file,
"url" => "readfile.php?file=" . urlencode($file)
));
}
}
echo json_encode($data);
?>
index.php / index.html
<html>
<head>
<script src="http://code.jquery.com/jquery-2.2.4.min.js">
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js">
</head>
<body>
<input id="searchbox" type="text" placeholder="search for files" />
<div id="results">
</div>
<script>
$(function () {
var searchbox = $("#searchbox");
var results = $("#results");
var doSearch = _.throttle(function () {
var searchtext = searchbox.val();
$.ajax({
type: 'get',
url: 'search.php',
dataType: "json",
data: {
search: searchtext
}
}).done(function (response) {
results.html(response.reduce(function (html, item) {
return html + '<div>' + item.name + '</div>';
}, ''));
});
}, 200);
searchbox.on('keydown', doSearch);
});
</script>
</body>
</html>
I am trying to download a pdf when clicking on a link.
I called function onlick of a link and in Codeigniter i wrote a function to download PDF file but when running URL ,file is downloaded but when triggered using click of link, its not working.
Controller:
function downloadpdf($pid)
{ set_time_limit(0);
$url="http://www.malayatourism.com/uploads/images/packages/pdf/$pid.pdf";
$file = basename($url);
$fp = fopen($file, 'w');
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_FILE, $fp);
$data = curl_exec($ch);
curl_close($ch);
fclose($fp);
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
echo "success";
}
My code ajax:
function DownLoadPdf(id)
{
url = "<?php echo base_url();?>admin/packages/downloadpdf/"+id;
$.ajax({
type:'POST',
url: url,
data : { pid : id},
success : function(response) {
console.log(response);
},
error : function(response) {
console.log("error");
}
});
}
View:
echo ' Download Attachment';
As far as ajax is concerned you cannot do that via ajax because ajax is not made for this purpose,its an asynchronous call that will give you a result. But you can do this without using any jquery, ajax at all
<a href="http://www.malayatourism.com/uploads/images/packages/pdf/$pid.pdf" download> Download Attachment</a>
Where $pid is the id you want to download the file. The download attribute will force the file to download. Cheers
I have one PHP file and other JavaScript. In JavaScript, I pass the variable with location of place where the file exists but on the PHP side doesn't recognize and doesn't properly download the file.
Code of JavaScript:
var nameFile = oEvent.getParameters().listItem.getTitle();
var directory = "C:/xampp/htdocsui5launchpad/WebContent/documents/";
window.location =directory;
$.ajax({
url: 'http://localhost/ui5launchpad/WebContent/php/downloadPDF.php',
type: 'POST',
datatype: "json",
data: { album: nameFile },
success: function (response, data, xhr) {
window.location = 'http://localhost/ui5launchpad/WebContent/php/downloadPDF.php';
},
error: function (response) {
console.log("Error in PHP, downloadPDF.php ");
}
});
PHP code:
if(isset($_POST["album"])){
$name = $_POST["album"];
}
$dir = "C:/xampp/htdocs/ui5launchpad/WebContent/documents/";
$file = $dir . $name;
if( isset($file)) {
//echo $file;
if (file_exists($file)) {
//echo $file;
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
exit;
}
}
Can you help me, please ?
Thanks
You don't need to use ajax to download a file. Just link the file direct to the browser.
In the link tag put the attribute like this:
<a href="http://example.com/file.pdf" download>Download</a>
I have some files on my PHP server inside uploads folder. My problem is the following: I want to send a JSON asynchronous request from my client as to choose one of these files and create with this an image element as to display it in the browser.
JS code
var file_name="test.jpg";
$.ajax({
method:"POST",
dataType:"json",
url:"retrieve_photo.php",
data:{name:file_name},
success: function(data) {
var new_thumb = document.createElement("img");
document.getElementById('dragarea').appendChild(new_thumb);
...
}
})
PHP code (retrieve_photo.php):
<?php
$ds = DIRECTORY_SEPARATOR;
$storeFolder="uploads";
$file_name=$_POST[name];
$files = glob($storeFolder.$ds.$file_name);
if ( false!==$files ) {
....
}
header('Content-type: text/json');
header('Content-type: application/json');
echo json_encode($result);
?>
I do not know what to write as $result feeds data the right way. I 've tried
$result=readfile($storeFolder.$ds.$file_name);
but maybe not correctly.As to conclude I want to use data as to display an image to my browser.
Thank you
Maybe will be better do something like that?:
var image = new Image();
image.src = "blabla";
$(image).on('load', function(){
//do what you want
})
Why do you even use AJAX? Maybe i don't understand)
Since you don't use algorithm or functions in your PHP, you can do everything by Javascript / Jquery :
var img = $("<img />").attr('src', 'uploads/'+ file_name)
.on('load', function() {
if (!this.complete || typeof this.naturalWidth == "undefined") {
alert('Image not found');
} else {
$("#dragarea").append(img);
}
});
document.getElementByI('dragarea').appendChild(new_thumb);
Мaybe you mean? document.getElementById('dragarea').appendChild(new_thumb);
document.getElementById('dragarea').appendChild(new_thumb);
try this in your retrieve_photo.php
$filename = "test.jpg";
//Make sure $filename contains the appropriate path of the photo
$size = getimagesize($filename);
$file = $filename;
if ($size) {
header("Content-type:". $size['mime']);
header("Content-Length: " . filesize($file));
header("Content-Disposition: attachment; filename=$filename");
header('Content-Transfer-Encoding: base64');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header("Content-Type: application/force-download");
readfile($file);
exit;
}
i am this problem of not being able to download image from server to my PC(No saving prompt ) , no error message have been shown
The output i am receiving is some unreadable code from the google chrome inspect element
Thanks in advance
Javascript
function Download(id) {
console.log(id);
$.ajax({
type: 'post',
url: 'DownloadRequest.php',
data: {filename: id.trim()},
});
}
DownloadRequest.php File
<?php
$file = $_POST['filename'];
header ("Content-Type: application/download");
header ("Content-Disposition: attachment; filename=$file");
header("Content-Length: " . filesize("$file"));
$fp = fopen("$file", "r");
fpassthru($fp);
?>
Solution
function Download(id) {
window.location="DownloadRequest.php?url="+id.trim();
}
<?php
$file = $_GET['url'];;
header ("Content-Type: application/download");
header ("Content-Disposition: attachment; filename=$file");
header("Content-Length: " . filesize("$file"));
$fp = fopen("$file", "r");
fpassthru($fp);
?>
you can try like this, instead of using ajax,
window.location="DownloadRequest.php?filename";
Final code,
function Download(id) {
console.log(id);
window.location="DownloadRequest.php?filename";
}