I want to implement a simple file upload in my intranet-page, with the smallest setup possible.
This is my HTML part:
<input id="sortpicture" type="file" name="sortpic" />
<button id="upload">Upload</button>
and this is my JS jquery script:
$("#upload").on("click", function() {
var file_data = $("#sortpicture").prop("files")[0];
var form_data = new FormData();
form_data.append("file", file_data);
alert(form_data);
$.ajax({
url: "/uploads",
dataType: 'script',
cache: false,
contentType: false,
processData: false,
data: form_data,
type: 'post',
success: function(){
alert("works");
}
});
});
There is a folder named "uploads" in the root directory of the website, with change permissions for "users" and "IIS_users".
When I select a file with the file-form and press the upload button, the first alert returns "[object FormData]". the second alert doesn't get called and the"uploads" folder is empty too!?
Can someone help my finding out whats wrong?
Also the next step should be, to rename the file with a server side generated name. Maybe someone can give me a solution for this, too.
This question is related to
javascript
php
jquery
ajax
upload
Best File Upload Using Jquery Ajax With Materialise Click Here to Download
When you select image the image will be Converted in base 64 and you can store this in to database so it will be light weight also.
and this is the php file to receive the uplaoded files
<?
$data = array();
//check with your logic
if (isset($_FILES)) {
$error = false;
$files = array();
$uploaddir = $target_dir;
foreach ($_FILES as $file) {
if (move_uploaded_file($file['tmp_name'], $uploaddir . basename( $file['name']))) {
$files[] = $uploaddir . $file['name'];
} else {
$error = true;
}
}
$data = ($error) ? array('error' => 'There was an error uploading your files') : array('files' => $files);
} else {
$data = array('success' => 'NO FILES ARE SENT','formData' => $_REQUEST);
}
echo json_encode($data);
?>
**1. index.php**
<body>
<span id="msg" style="color:red"></span><br/>
<input type="file" id="photo"><br/>
<script type="text/javascript" src="jquery-3.2.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(document).on('change','#photo',function(){
var property = document.getElementById('photo').files[0];
var image_name = property.name;
var image_extension = image_name.split('.').pop().toLowerCase();
if(jQuery.inArray(image_extension,['gif','jpg','jpeg','']) == -1){
alert("Invalid image file");
}
var form_data = new FormData();
form_data.append("file",property);
$.ajax({
url:'upload.php',
method:'POST',
data:form_data,
contentType:false,
cache:false,
processData:false,
beforeSend:function(){
$('#msg').html('Loading......');
},
success:function(data){
console.log(data);
$('#msg').html(data);
}
});
});
});
</script>
</body>
**2.upload.php**
<?php
if($_FILES['file']['name'] != ''){
$test = explode('.', $_FILES['file']['name']);
$extension = end($test);
$name = rand(100,999).'.'.$extension;
$location = 'uploads/'.$name;
move_uploaded_file($_FILES['file']['tmp_name'], $location);
echo '<img src="'.$location.'" height="100" width="100" />';
}
var formData = new FormData($("#YOUR_FORM_ID")[0]);
$.ajax({
url: "upload.php",
type: "POST",
data : formData,
processData: false,
contentType: false,
beforeSend: function() {
},
success: function(data){
},
error: function(xhr, ajaxOptions, thrownError) {
console.log(thrownError + "\r\n" + xhr.statusText + "\r\n" + xhr.responseText);
}
});
Use pure js
async function saveFile() _x000D_
{_x000D_
let formData = new FormData(); _x000D_
formData.append("file", sortpicture.files[0]);_x000D_
await fetch('/uploads', {method: "POST", body: formData}); _x000D_
alert('works');_x000D_
}<input id="sortpicture" type="file" name="sortpic" />_x000D_
<button id="upload" onclick="saveFile()">Upload</button>_x000D_
<br>Before click upload look on chrome>console>network (in this snipped we will see 404)The filename is automatically included to request and server can read it, the 'content-type' is automatically set to 'multipart/form-data'. Here is more developed example with error handling and additional json sending
async function saveFile(inp) _x000D_
{_x000D_
let user = { name:'john', age:34 };_x000D_
let formData = new FormData();_x000D_
let photo = inp.files[0]; _x000D_
_x000D_
formData.append("photo", photo);_x000D_
formData.append("user", JSON.stringify(user)); _x000D_
_x000D_
try {_x000D_
let r = await fetch('/upload/image', {method: "POST", body: formData}); _x000D_
console.log('HTTP response code:',r.status); _x000D_
alert('success');_x000D_
} catch(e) {_x000D_
console.log('Huston we have problem...:', e);_x000D_
}_x000D_
_x000D_
}<input type="file" onchange="saveFile(this)" >_x000D_
<br><br>_x000D_
Before selecting the file Open chrome console > network tab to see the request details._x000D_
<br><br>_x000D_
<small>Because in this example we send request to https://stacksnippets.net/upload/image the response code will be 404 ofcourse...</small>Source: Stackoverflow.com