验证laravel中的base64解码图像 [英] Validate a base64 decoded image in laravel

问题描述

我试图从PUT请求中获取图片以更新用户图片(使用邮递员)，并使其通过Laravel 5.2中的验证，以使邮递员中的调用使用以下网址:

Im trying to get a image from a PUT request for update a user picture(using postman), and make it pass through a validation in Laravel 5.2, for making the call in postman use the following url:

http://localhost:8000/api/v1/users?_method = PUT

并使用这样的json将图片字符串发送到正文中:

and send the image string in the body, using a json like this:

{
    "picture" : "data:image/png;base64,this-is-the-base64-encode-string"
}

在控制器中，尝试使用多种方法解码图像并尝试通过验证:

In the controller try a lot of differents ways for decode the image and try to pass the validation:

1. 首先，我尝试过:

1. First I tried this:

$data = request->input('picture');
$data = str_replace('data:image/png;base64,', '', $data);
$data = str_replace(' ', '+', $data);
$image = base64_decode($data);
$file = app_path() . uniqid() . '.png';
$success = file_put_contents($file, $image);

然后我尝试了这个:

Then I tried this:

list($type, $data) = explode(';', $data);
list(, $data) = explode(',', $data);
$data = base64_decode($data);
$typeFile = explode(':', $type);
$extension = explode('/', $typeFile[1]);
$ext = $extension[1];
Storage::put(public_path() . '/prueba.' . $ext, $data);
$contents = Storage::get(base_path() . '/public/prueba.png');

尝试使用干预图像库( http://image.intervention.io/ )，并且不要通过:

Try to use the intervention image library (http://image.intervention.io/) and don't pass:

$image = Image::make($data);
$image->save(app_path() . 'test2.png');
$image = Image::make(app_path() . 'test1.png');

这是控制器中的验证:

    $data = [
        'picture' => $image,
        'first_name' => $request->input('first_name'),
        'last_name' => $request->input('last_name')
    ];

    $validator = Validator::make($data, User::rulesForUpdate());
    if ($validator->fails()) {
        return $this->respondFailedParametersValidation('Parameters failed validation for a user picture');
    } 

这是用户模型中的验证:

this is the validation in the User-model:

public static function rulesForUpdate() {
    return [
        'first_name' => 'max:255',
        'last_name' => 'max:255',
        'picture' => 'image|max:5000|mimes:jpeg,png'
    ];
}   

推荐答案

您可以扩展Laravel的Validator类.

You can extend the Validator class of Laravel.

Laravel文档

但是无论如何尝试

Validator::extend('is_png',function($attribute, $value, $params, $validator) {
    $image = base64_decode($value);
    $f = finfo_open();
    $result = finfo_buffer($f, $image, FILEINFO_MIME_TYPE);
    return $result == 'image/png';
});

别忘了规则:

$rules = array(
   'image' => 'is_png'
);

这篇关于验证laravel中的base64解码图像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！