In the process of writing web programs, we often encounter a classic file upload scenario: upload Avatar (picture). Based on the pursuit of the best user experience, write about the Ajax uploading avatar implemented in the Laravel project before.
1. Configure routing
Set routing in Laravel’s routes.php:
Route::get('/avatar/upload','UsersController@avatar');
Route::post('/avatar/upload','UsersController@avatarUpload');
2. Configure controller
Add the corresponding avatar and avatarUpload methods in UsersController.php. The former is used to render the view, and the latter processes the actually uploaded image file.
public function avatar()
{
return view('users.avatar');
}
public function avatarUpload()
{
//some codes to deal with upload avatar
}
3. Write the front-end code
This is actually set in the avatar.blade.php view file of the corresponding users/ folder Style, each tag of the following HTML can be set according to your own situation class and id:
<header>
<img src="/static/imghwm/default1.png" data-src="https://wt-prj.oss.aliyuncs.com/0d06af79c49d4e08abb1ab3f7ab6e860/772c684b-10a4-43cf-8eec-dda9e28a5a23.png" class="lazy" alt="Detailed explanation of how to implement Ajax to upload user avatars in Laravel projects" >
<p></p>
<p>
{!! Form::open( [ 'url' => ['/avatar/upload/api'], 'method' => 'POST', 'id' => 'upload', 'files' => true ] ) !!}
<a>
<label>
<span>更换新头像</span>
<input>
</label>
</a>
{!! Form::close() !!}
</p>
<p>
</p>
<p>
</p>
<span></span>
</header>
to implement Ajax requests in js, the Ajax here uses Jquery Third-party plug-in http://malsup.com/jquery/form/:
$(document).ready(function() {
var options = {
beforeSubmit: showRequest,
success: showResponse,
dataType: 'json'
};
$('#image').on('change', function(){
$('#upload-avatar').html('正在上传...');
$('#upload').ajaxForm(options).submit();
});
});
function showRequest() {
$("#validation-errors").hide().empty();
$("#output").css('display','none');
return true;
}
function showResponse(response) {
if(response.success == false)
{
var responseErrors = response.errors;
$.each(responseErrors, function(index, value)
{
if (value.length != 0)
{
$("#validation-errors").append('<p><strong>'+ value +'</strong></p><p>');
}
});
$("#validation-errors").show();
} else {
$('#user-avatar').attr('src',response.avatar);
}
}</p>
4. Process the uploaded image
Return to UsersController.php ##avatarUpload method, you can now process the uploaded image:
public function avatar()
{
$this->wrongTokenAjax();
$file = Input::file('image');
$input = array('image' => $file);
$rules = array(
'image' => 'image'
);
$validator = Validator::make($input, $rules);
if ( $validator->fails() ) {
return Response::json([
'success' => false,
'errors' => $validator->getMessageBag()->toArray()
]);
}
$destinationPath = 'uploads/';
$filename = $file->getClientOriginalName();
$file->move($destinationPath, $filename);
return Response::json(
[
'success' => true,
'avatar' => asset($destinationPath.$filename),
]
);
}
}
Note: Before uploading, confirm that it is created in laravel'sIn the abovepublic/
directoryuploads/folder, and give corresponding permissions, such as:sudo chmod -R 777 uploads/
avatarUpload method, there is a wrongTokenAjaxMethod, this is used to test the token value of the Laravel system. It is also added in UsersController.php:
public function wrongTokenAjax()
{
if ( Session::token() !== Request::get('_token') ) {
$response = [
'status' => false,
'errors' => 'Wrong Token',
];
return Response::json($response);
}
}5.FinallyA simple
Ajax demo for uploading images is now complete. In actual development, we also need to consider the following issues:
- ## Create different folders based on the user's different usernames or user ids. These can be used before the
- avatarUpload
method
$file->move($destinationPath, $filename)<pre class="brush:php;toolbar:false">File::exists($username) or File::makeDirectory($username);</pre>Update the user's - avatar
field in the database, probably like this: Before the
avatarUploadmethod returns the data, use a similar statement below ：<pre class="brush:php;toolbar:false">$user->avatar = your_avtar_upload_path; $user->save();</pre>If you want to further improve the experience and provide some image cropping and adding filters, you can use the Intervention/Image php package and Jcrop js image cropping at the same time. For example, in: -
function showResponse(response) { }, if the image is successfully returned, execute after
$('#user-avatar').attr('src',response.avatar):
height<pre class="brush:php;toolbar:false"> $('#user-avatar').Jcrop({ aspectRatio: 1, onSelect: updateCoords, setSelect: [120,120,10,10] });</pre>You can implement image cropping on the front end, and then add the corresponding cropping data such as,
width,x-alignof the cropped image.y-alignJust wait until it is sent to the backend for processing. If you use Intervention/Image, processing images on the backend is a piece of cake!
