通过上传使用Symfony2的和放API的图像文件; FOSRESTBundle [英] Uploading image file through API using Symfony2 & FOSRESTBundle

问题描述

我一直在编码的API使用Symfony2中，FOSRESTBundle和Vichuploader文件上传Instagram的喜欢的照片共享应用程序。

I have been coding an API for a photo sharing app like Instagram using Symfony2, FOSRESTBundle, and Vichuploader for file uploads.

我能够解决GET和POST请求，但我无法找到如何连接到一个POST请求一个例子，实际的图像，这样，在我的情况下，可以Vichuploader抓住它，并帮助我文件上传

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.

顺便说一句，我可以使用通过使用正常形态提到堆栈上传文件没有问题。

By the way, I can upload a file without issue using the stack mentioned through the use of a normal form.

感谢

狮子座

推荐答案

我一直在寻找一个关于完全相同的问题的解决方案。下面是我做的。

I have been looking for a solution about the exact same problem. Here is what I did.

首先让我解释一下我的约束。我希望我的API是充满JSON，并采取HTTP协议的功率（头，方法等）。我选择使用：

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:

• 的Symfony2为一切几乎是为你做，只是code你的业务逻辑。


• Doctrine2因为默认情况下与Symfony2中，并提供了一​​种方法通过改变一个符合最流行的数据库管理系统进行整合。


• FOSRestBundle来处理我的API的剩余部分（做注解，身体监听器，用于支持JMSSerializer响应汽车等格式最大）。


• KnpGaufretteBundle，因为我想允许改变我快速存储BLOB文件的方式。

第一个解决方案设想：BASE64

我首先想到的，因为我在想JSON每次，是EN code以base64所有传入的图片，我的API里面，并将其储存然后去code他们。

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.

这种解决方案的优点是，可以与其他数据一起传送的图像。例如在一个API调用上传整个用户的个人资料。不过，我看到，在Base64编码的图像让他们其初始大小的33％的速度增长。我送3的图像后不希望我的用户成为了移动数据流量。

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.

二的解决方案设想：形式

然后我想用上述形式。但我不知道怎么我的客户会同时发送JSON数据（例如 {姓氏：利兹} ）和图像数据（例如图像/ PNG 之一）。我知道，你可以处理一个内容类型：多重/ form-data的但仅此而已。

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.

另外，我没有使用形式从一开始我的API和我想它是在我所有的code均匀。 [微型编辑：HOHO，这是我刚刚发现，这里]

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]

第三和最后的解决方案：使用HTTP ..

然后，一到晚上，启示。我使用内容类型：应用程序/ JSON 为发送JSON数据。为什么不使用图像/ * 发送图像？很容易，我搜索了天，这个思想来之前。这是我做的（简化code）。让我们假设用户在调用 PUT / API / ME /图片与内容类型：图像/ *

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/*

1. UserController中:: getUserImageAction（请求$要求） - 捕请求

1. 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（$用户，$内容） - 业务逻辑（我把这里的一切是simplier阅读）

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;

这篇关于通过上传使用Symfony2的和放API的图像文件; FOSRESTBundle的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！