通过URL输入设置Symfony上传文件

时间:2016-11-06 21:53:10

标签: php symfony

通过XML导入,我还获得了外部服务器上jpg图像的URL链接。我想要复制图像。我试图通过Symfony中的UploadedFile()函数执行此操作,然后将它们添加到我的实体中。

通过以下代码,我想在Symfony图像对象中添加url图像。

$f = new UploadedFile();
$f->openFile($imageUrl);

因此,在打开文件后,我想将它们添加到我的图像实体中。

$image = new image();
$image->setFile($f);

此实体包含以下文件参数:

/**
* Sets file.
*
* @param \Symfony\Component\HttpFoundation\File\UploadedFile $file
*/
public function setFile(UploadedFile $file = NULL) {
    $this->file = $file;
}

/**
* Get file.
*
* @return UploadedFile
*/
public function getFile() {
    return $this->file;
}

然后我得到缺少参数的错误。但是使用from它可以使用以下代码:

$image = new image();
$image->setFile($request->files->get('images'));

2 个答案:

答案 0 :(得分:3)

我使用vich uploader bundle(https://github.com/dustin10/VichUploaderBundle)上传图片,该套装提供了一种从表单上传图片的方法。我有与你相同的用例。我必须从xml导入图像。

我使用vich服务(vich_uploader.upload_handler)从xml中执行此操作:

实体:

namespace AppBundle;

use Doctrine\ORM\Mapping AS ORM;
use Symfony\Component\HttpFoundation\File\File;

/**

 * @ORM\Table(name="entity")
 * @Vich\Uploadable
 */
class Entity
{

/**
 * @ORM\Column(type="string", nullable=true)
 */
private $image;

/**
 * @Vich\UploadableField(mapping="test_image", fileNameProperty="image")
 * @var File
 */
private $imageFile;


/**
 * @return File
 */
public function getImageFile()
{
    return $this->imageFile;
}

/**
 * @param File|\Symfony\Component\HttpFoundation\File\UploadedFile $image
 */
public function setImageFile(File $image = null)
{
    $this->imageFile = $image;

    if ($image) {
        // It is required that at least one field changes if you are using doctrine
        // otherwise the event listeners won't be called and the file is lost
        $this->updatedAt = new \DateTime('now');
    }
}
}

服务:

<?php

namespace AppBundle;

use Symfony\Component\HttpFoundation\File\UploadedFile;
use Vich\UploaderBundle\Handler\UploadHandler;

class ExternalImageUploader
{

private $uploadHandler;
private $kernelRootDir;


public function __construct(UploadHandler $uploadHandler, $kernelRootDir)
{
    $this->uploadHandler = $uploadHandler;
    $this->kernelRootDir = $kernelRootDir;
}

public function copyExternalFile($url, $entity)
{

    $newfile = $this->kernelRootDir.'/../web/uploads/test.jpg';

    copy($url, $newfile);
    $mimeType = mime_content_type($newfile);
    $size = filesize ($newfile);
    $finalName = md5(uniqid(rand(), true)).".jpg";

    $uploadedFile = new UploadedFile($newfile,$finalName,$mimeType, $size);

    $entity->setImageFile($uploadedFile);
    $this->uploadHandler->upload($entity,'imageFile');


}
}

的services.xml

<service id="app.external_image_uploader" class="AppBundle\ExternalImageUploader">
        <argument type="service" id="vich_uploader.upload_handler" />
        <argument>%kernel.root_dir%</argument>
    </service>

答案 1 :(得分:0)

要使用php从网址下载文件,您需要查看:http://php.net/manual/fr/function.file-put-contents.php

使用Symfony File对象, 如果您有图像实体,则要保留图像:

namespace AppBundle\Entity;

use Symfony\Component\HttpFoundation\File\File;

class Image
{
    protected $file;

    public function setFile(File $myFile = null)
    {
        $this->file = $myFile;
    }

    public function getFile()
    {
        return $this->file;
    }
}

如果要使用注释指定一些验证规则

use Symfony\Component\Validator\Constraints as Assert;

class Image
{
    /**
     * @Assert\File(
     *     maxSize = "1024k",
     *     mimeTypes = {"image/jpeg", "image/png"},
     *     mimeTypesMessage = "Please upload a valid image"
     * )
     */
    protected file;
}

然后移动文件的上传功能

public function upload(File $file)
{
    //generate unique filename
    $fileName = md5(uniqid()).'.'.$file->guessExtension();

    //Set other entity attribute here

    //move the file
    $file->move($targetDirectory, $fileName);

    return $fileName;
}

然后在控制器中执行类似这样的操作

$em = $this->getDoctrine()->getManager();
$image = new Image();
$file = file_get_contents('http://www.example.com/');
$image->setFile($file);
$image->upload();
//Maybe persist your entity if you need it
$em->persist($image);
$em->flush();

这是一个帮助您的快速示例,可能无法使用复制过去(并且它不是目的)。

看看:http://symfony.com/doc/current/controller/upload_file.html