I have been coding an API for a photo sharing app like Instagram using Symfony2, FOSRESTBundle, and Vichuploader for file uploads.
I'm able to work around GET and POST requests, but I can't find an example of how to attach to a POST request, the actual image so that in my case, Vichuploader can grab it and help me out with the file upload.
By the way, I can upload a file without issue using the stack mentioned through the use of a normal form.
I have been looking for a solution about the exact same problem. Here is what I did.
First let me explain my constraints. I wanted my API to be full JSON and to take power of the HTTP protocol (headers, methods, etc.). I chose to use:
Symfony2 for the "everything is almost done for you, just code your business logic".
Doctrine2 because by default with Symfony2 and provide a way to integrate with most popular DBMS by changing one line.
FOSRestBundle to handle the REST part of my API (do the maximum with annotations, body listener, auto format for the response with JMSSerializer support, etc.).
KnpGaufretteBundle because I wanted to be allowed to change the way I store blob file quickly.
First solution envisaged: base64
My first thought, because I was thinking JSON everytime, was to encode all the incoming images in base64, then decode them inside my API and store them.
The advantage with this solution is that you can pass images along with other data. For instance upload a whole user's profile in one API call. But I read that encoding images in base64 make them grow by 33% of their initial size. I did not wanted my users to be out of mobile data after sending 3 images.
Second solution envisaged: form
Then I thought using forms as described above. But I did not know how my clients could send both JSON data (for instance {"last_name":"Litz"}) and image data (for instance image/png one). I know that you can deal with an Content-Type: multipart/form-data but nothing more.
Plus I was not using forms in my API since the beginning and I wanted it to be uniform in all my code. [mini-edit: hoho, something I just discovered, here]
Third and last solution: use HTTP..
Then, one night, the revelation. I'm using Content-Type: application/json for send JSON data. Why not use image/* to send images? So easy that I searched for days before coming with this idea. This is how I did it (simplified code). Let suppose that the user is calling PUT /api/me/image with a Content-Type: image/*
UserController::getUserImageAction(Request $request) - Catching the Request
// get the service to handle the image
$service = $this->get('service.user_image');
$content = $request->getContent();
$userImage = $service->updateUserImage($user, $content);
// get the response from FOSRestBundle::View
$response = $this->view()->getResponse();
$response->setContent($content);
$response->headers->set('Content-Type', $userImage->getMimeType());
return $response;
UserImageService::updateUserImage($user, $content) - Business Logic (I put everything here to be simplier to read)
// Create a temporary file on the disk
// the temp file will be delete at the end of the script
// see http://www.php.net/manual/en/function.tmpfile.php
$file = tmpfile();
if ($file === false)
throw new \Exception('File can not be opened.');
// Put content in this file
$path = stream_get_meta_data($file)['uri'];
file_put_contents($path, $content);
// the UploadedFile of the user image
// referencing the temp file (used for validation only)
$uploadedFile = new UploadedFile($path, $path, null, null, null, true);
// the UserImage to return
$userImage = $user->getUserImage();
if (is_null($userImage))
{
$userImage = new UserImage();
$userImage->setOwner($user);
// auto persist with my configuration
// plus generation of a unique ID that allows
// me to retrieve the image at anytime
$userImage->setKey(/*random string*/);
}
// fill the UserImage properties
$userImage->setImage($uploadedFile);
$userImage->setMimeType($uploadedFile->getMimeType());
/** #var ConstraintViolationInterface $validationError */
if (count($this->getValidator()->validate($userImage)) > 0)
throw new \Exception('Validation');
// if no error we can write the file definitively
// [KnpGaufretteBundle code to store on disk]
// [use the UserImage::key to store]
$this->getEntityManager()->flush();
return $userImage;
You use form types for posts with the FOSRestBundle:
For example you have this form type:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('facebook_id',
'text',
array(
'mapped' => FALSE
)
)
->add('profile_pic',
'text',
array(
'mapped' => FALSE
)
)
;
$builder->addValidator(new CallbackValidator(function(FormInterface $form)
{
if ($form["facebook_id"]->getData() === '' || $form["facebook_id"]->getData() === NULL)
{
$form->get('facebook_id')->addError(new FormError('facebook_id should not be empty'));
}
if ($form["profile_pic"]->getData() === '' || $form["profile_pic"]->getData() === NULL)
{
$form->get('profile_pic')->addError(new FormError('profile_pic should not be empty'));
}
})
);
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
// 'validation_constraint' => $collectionConstraint,
'csrf_protection' => FALSE,
));
}
public function getName()
{
return 'data';
}
Then what you can do is post JSON to the API. Don't forget to set the header as "Content-type = application/json" when you do a POST.
The JSON structure would look like this:
{
"data": {
"facebook_id": "12345",
"profile_pic": 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}
}
Why is this json wrapped in "data"? Because your form type also has "data" in getName so it will use validation and etc.
What I always do is I encode my pictures as a base64 string while sending them to the API.
Then in the post function you just convert it back:
$base64 = $form['profile_pic']->getData();
//decode back to image data and create image
$image = imagecreatefromstring(base64_decode($base64));
imagepng($image, $path);
This is a full upload from api code bit. This does upload the file, but I am still having trouble with validating the uploaded file. Hope this helps.
This uses fosrest bundle for REST.
private function addResource(Entity $resource) {
$em = $this->getDoctrine()->getManager();
$em->persist($resource);
$em->flush();
}
private function processForm(Entity $resource)
{
$em = $this->getDoctrine()->getManager();
$uploadedFile = null;
$form = $this->createForm(new EntityForm(), $resource);
foreach ($_FILES as $file) {
$uploadedFile = new UploadedFile(
$file['tmp_name'],
$file['name'], $file['type'],
$file['size'], $file['error'],
$test = false);
}
$submitData = array(
"file" => $uploadedFile,
);
$form->submit($submitData);
if ($form->isValid()) {
$repository = $this->getDoctrine()
->getRepository('AcmeBundle:Product');
$view = View::create();
$resource->setFile($uploadedFile);
// handling api requests
if ($this->getRequest()->getMethod() == "POST") {
$this->addResource($resource);
// store image url
$resource = $repository->find($resource->getId());
if ($resource->getImage()) {
$fs = new Filesystem();
if ($fs->exists($resource->getWebPath())) {
$resource->setImagePath($resource->getWebPath());
}
$this->addResource($resource);
}
$view->setData($resource);
}
return $view;
}
return View::create($form);
}
An example for a upload method exepting post requests:
public function uploadAction() {
$em = $this->getDoctrine()->getManager();
$document = new Document();
foreach ($_FILES as $file) {
$document->setTitle($file['name']);
$document->file = new UploadedFile($file['tmp_name'],
$file['name'], $file['type'],
$file['size'], $file['error'], $test = false);
$em->persist($document);
$em->flush();
break;
}
$serializer = $this->get('jms_serializer');
$data = $serializer->serialize(
$document, 'json',
SerializationContext::create()->setGroups(array('someGroup')));
return new Response($data);
}
So this action first stores the document on the server and returns a json response containing document meta data and path. I used the response for further processing in my web application.
I am not familiar with VichUploader, the above code is native Symfony2 code using Symfony\Component\HttpFoundation\File\UploadedFile.
Read: http://symfony.com/doc/current/cookbook/doctrine/file_uploads.html
Related
I have created my component to add some desired config fields in Shopware 6. Everything is working fine but one problem that is image is looking as it is being saved in the administration but is not showing any src or else in dump.
And here is my dump preiew having #data null.
can anyone tell what should I do else here?
I will be very thankful.
There is a guide in the docs that explains exactly what your case is.
You can likely extend the \Shopware\Core\Content\Media\Cms\ImageCmsElementResolver and override the getType function:
public function getType(): string
{
return 'my-component-name';
}
The important part of the default ImageCmsElementResolver is the loading the media information. For that you also need in your CMS element resolver. I explain some parts of the existing ImageCmsElementResolver so you can see which steps you need:
public function collect(CmsSlotEntity $slot, ResolverContext $resolverContext): ?CriteriaCollection
{
// read the configuration, that is defined in the Admin JS. Likely also media for you
$mediaConfig = $slot->getFieldConfig()->get('media');
// if this config is NOT containing useful info
if (
$mediaConfig === null
|| $mediaConfig->isMapped()
|| $mediaConfig->isDefault()
|| $mediaConfig->getValue() === null
) {
// return nothing
return null;
}
// otherwise use the configured value as mediaId to load the media entry from the database
$criteria = new Criteria([$mediaConfig->getStringValue()]);
$criteriaCollection = new CriteriaCollection();
$criteriaCollection->add('media_' . $slot->getUniqueIdentifier(), MediaDefinition::class, $criteria);
// return the criterias to execute later, when all needed entities for the CMS page are fetched
return $criteriaCollection;
}
Now the data is fetched and as next step you need to put it into a variable accessible from the Twig template. For this you write into the same CMS element resolver this:
public function enrich(CmsSlotEntity $slot, ResolverContext $resolverContext, ElementDataCollection $result): void
{
$config = $slot->getFieldConfig();
$image = new ImageStruct();
// this is important for accessing data in Twig
$slot->setData($image);
// read the config again
$mediaConfig = $config->get('media');
// if the configuration looks promising
if ($mediaConfig && $config->isStatic() && $mediaConfig->getValue()) {
$image->setMediaId($config->getStringValue());
// look up the media from the entity loading step
$searchResult = $result->get('media_' . $slot->getUniqueIdentifier());
if (!$searchResult) {
return;
}
/** #var MediaEntity|null $media */
$media = $searchResult->get($config->getValue());
// if we do not have a media, then skip it
if (!$media) {
return;
}
// set the media entity to the slot data we just assigned to the slot
$image->setMedia($media);
}
}
After that you should have more info in the slot variable in Twig to embed a media.
I'm using PhpSpreadsheet to generate an Excel file in Symfony 4. My code is:
$spreadsheet = $this->generateExcel($content);
$writer = new Xlsx($spreadsheet);
$filename = "myFile.xlsx";
$writer->save($filename); // LINE I WANT TO AVOID
$response = new BinaryFileResponse($filename);
$response->headers->set('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
$response->setContentDisposition(
ResponseHeaderBag::DISPOSITION_ATTACHMENT,
$filename
);
But I don't want to save the file and then read it to return to the user. I would like to download Excel content directly. Is there a way to do It?
I've searched how to generate a stream of the content (as this answer says) but I hadn't success.
Thanks in advance and sorry about my English
As I understand you are generating the content in your code.
You can stream the response in Symfony and configure PhpSpreadsheet Writer to save to 'php://output' (see here the official doc Redirect output to a client's web browser).
Here is an working example using Symfony 4.1 and Phpspreadsheet 1.3:
<?php
namespace App\Controller;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use Symfony\Component\HttpFoundation\StreamedResponse;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use PhpOffice\PhpSpreadsheet\Writer as Writer;
class TestController extends Controller
{
/**
* #Route("/save")
*/
public function index()
{
$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();
$sheet->setCellValue('A1', 'Hello World !');
$writer = new Writer\Xls($spreadsheet);
$response = new StreamedResponse(
function () use ($writer) {
$writer->save('php://output');
}
);
$response->headers->set('Content-Type', 'application/vnd.ms-excel');
$response->headers->set('Content-Disposition', 'attachment;filename="ExportScan.xls"');
$response->headers->set('Cache-Control','max-age=0');
return $response;
}
}
This is the solution for Laravel. But it still uses Symfony\Component\HttpFoundation\StreamedResponse in the end.
$contentDisposition = 'attachment; filename="' . $fileName . '"';
$contentType = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
$response = response()->streamDownload(function () use ($spreadsheet) {
$writer = new Xlsx($spreadsheet);
$writer->save('php://output');
});
$response->setStatusCode(200);
$response->headers->set('Content-Type', $contentType);
$response->headers->set('Content-Disposition', $contentDisposition);
Then you can send the response directly as a stream with
$response->send();
or just return it back in the controller
return $response;
#Override
public void onPayloadReceived(String endpointId, Payload payload) {
if (payload.getType() == Payload.Type.BYTES) {
String payloadFilenameMessage = new String(payload.asBytes(), "UTF-8");
addPayloadFilename(payloadFilenameMessage);
} else if (payload.getType() == Payload.Type.FILE) {
// Add this to our tracking map, so that we can retrieve the payload later.
incomingPayloads.add(payload.getId(), payload);
}
}
The issue is that the payload.getType() == Payload.Type.FILE condition is never true, only the Payload.Type.BYTES condition is true.
The sendPayload() snippet is from the Exchange Data API page.
// The URI of the file selected by the user.
Uri uri = resultData.getData();
// Open the ParcelFileDescriptor for this URI with read access.
ParcelFileDescriptor pfd = getContentResolver().openFileDescriptor(uri, "r");
Payload filePayload = Payload.fromFile(pfd);
// Finally, send the file payload.
Nearby.Connections.sendPayload(endpointId, filePayload);
I know it's a duplicate, but I haven't found any working solution in web (regarding sending files) at least to compare my code with (unfinished medium article (text), walkie talkie app (stream), and fragments of from documentation)
here's sources https://github.com/salexwm/FilesExchange
It looks like your code to send the file payload is commented out at https://github.com/salexwm/FilesExchange/blob/master/app/src/main/java/com/test/filesexchange/ShareService.java#L199 (and it hasn't been updated since you posted this question, so could that be it?)
The plugin play-reactivemongo offers an easy way to upload a file:
def upload = Action(gridFSBodyParser(gridFS)) { request =>
val futureFile: Future[ReadFile[BSONValue]] = request.body.files.head.ref
futureFile.map { file =>
// do something
Ok
}.recover { case e: Throwable => InternalServerError(e.getMessage) }
}
Unfortunately this solution doesn't suit me because:
I would like only my DAO layer to depend on reactive-mongo.
I need to save the file only if a user is authenticated (with SecureSocial) and use some user's properties as checks and metadata.
If no user is authenticated the request body shouldn't be parsed at all (see also this question).
It would be something along the lines
def upload = SecuredAction { request =>
val user = request.user
val enumerator = an enumrator from the body parsing ???
myDAO.saveFile(user, enumerator)
object myDAO {
def saveFile(user:User, enumerator:Enumerator[Array[Byte]]) = {
...
val fileToSave = DefaultFileToSave(...)
gridfs.save(enumerator, fileToSave)
...
}
}
Unfortunately it seems there is no way to get an enumerator from the parsing of the request body. The only way seems to provide the Action with a parser and an Iteratee that will be fed with the the body being parsed.
I couldn't figure out how to achieve it in a reactive way (without using a temporary file or storing the body in memory). Is it at all possible?
Actually, you might consider not using girdFS built-in parser at all:
val gfs = new GridFS(db)
// the controller method, Authenticated here is custom object extending ActionBuilder
def upload = Authenticated.async(parse.multipartFormData) { request =>
...
request.body.file("photo") match {
// handle error cases
...
case Some(photo) =>
val fileToSave = DefaultFileToSave(photo.filename, photo.contentType)
// here some more operations, basically you don't need the and need only photo.ref.file
val enumerator = Enumerator(Image(photo.ref.file).fitToWidth(120).write)
gfs.save(enumerator, fileToSave) map {
//handle responses and stuff
...
}
}
}
}
uploading images has been causing much trouble. I'm always having two problems. First it always fail to upload or unable to find the files when using asset manager when it is there in the folder!! So when my controller says unlink the file, it won't unlink anything. Second, it'll show failed to set unsafe attribute when my rules are set to safe.
Here is my rule:
array('product_image,product_gallery_1, product_gallery_2, product_gallery_3, product_gallery_4, product_gallery_5, product_gallery_6', 'file','types'=>'jpg, jpeg, gif, png','allowEmpty'=>true, 'on'=>'update', 'safe'=>true),
on view I do have
'htmlOptions'=>array('enctype'=>'multipart/form-data'),
Here's a section on update controller. It does upload multiple images:
public function actionUpdate($id)
{
$model=$this->loadModel($id);
$old_img = $model->product_image;
if(isset($_POST['Product']))
{
$model->update_date = time();
$model->product_approval_status = "N";
$t_product_image = $model->product_image;
$model->attributes=$_POST['Product'];
$product_image=CUploadedFile::getInstance($model,'product_image');
$storeid = $model->store_id;
$date = date('mdy');
$rnd = rand(0,9999);
$f_product_image = "{$rnd}-{$date}{$storeid}-{$product_image}";
//main img
if(!empty($product_image))
{
$model->product_image = $f_product_image;
}
else
{
if(file_exists(Yii::app()->basePath.'/images/shop/thumbnail/thumb_'.$model->product_image))
unlink(Yii::app()->basePath.'/images/shop/thumbnail/thumb_'.$old_img);
if(file_exists(Yii::app()->basePath.'/images/shop/product/'.$model->product_image)&& ($old_img !==null))
unlink(Yii::app()->basePath.'/images/shop/thumbnail/'.$old_img);
$model->product_image = $t_product_image;
}
if($model->save())
{
$url = Yii::app()->basePath.'/images/shop/product/';
$thumb = Yii::app()->basePath.'/images/shop/thumbnail/';
if(!empty($product_image))
{
$product_image->saveAs($url.$f_product_image);
$this->createThumb($url.$f_product_image, $thumb.'thumb_' . $f_product_image);
}
$this->redirect(array('submitted'));
}
}
$this->render('update',array(
'model'=>$model,
));
}
The problem is with your current defined scenario
In your model, you specify the attributes safe under the update scenario.
array('product_image, ..., product_gallery_6', ... 'on'=>'update', 'safe'=>true)
Therefore, in your controller, you need to set the scenario.
$model = new MyActiveRecord('update');
Since you are using a function you may not have control over, you can explicitly set this:
$model->scenario = 'update';
Note that your problem might be elsewhere, depending on the operation of loadModule(), because ceratin ActiveRecord scenarios are automatically loaded. See the section 'CActiveRecord scenarios' in the linked page.