Cakephp 3 - 图片上传 - mimeType - 无法验证丢失文件的 mimetype

Question

我认为这是 Cakephp 3 中的一个错误，但我想先仔细检查一下。

Cakephp 3.2.3 - 带有 XAMPP 3.2.2 的 Windows 7

查看：file.ctp

 <div>
 <?= $this->Form->create($client, ['type' => 'file']) ?>
 <?= $this->Form->input('logo', ['type' => 'file']); ?>
 <?= $this->Form->button(__('Submit')) ?>
 <?= $this->Form->end() ?>
 </div>

控制器：ClientsController.php

public function file() {
    $client = $this->Clients->newEntity();

    if ($this->request->is('post') ) {
        $client = $this->Clients->patchEntity($client, $this->request->data);
        if (!is_null($client->logo)
            && !empty($this->request->data)
            && !empty($this->request->data['logo'])
            && !empty($this->request->data['logo']['name']))
            $client->logo = $this->request->data['logo'];

        $client->name = 'TEST';

        if ($this->Clients->save($client)) {
            $this->Flash->success(__('The client has been saved.'));
            return $this->redirect(['action' => 'file']);
        } else {
            $this->Flash->error(__('The client could not be saved. Please, try again.'));
        }
    }
    $this->set(compact('client'));
    $this->set('_serialize', ['client']);
}

模型：ClientsTable.php

public function validationDefault(Validator $validator)
{
    $validator
        ->add('logo', [
            'uploadError' => [
                'rule' => 'uploadError',
                'message' => __d('clients', 'The logo upload failed.')
            ],
            'mimeType' => [
                'rule' => array('mimeType', array('image/gif', 'image/png', 'image/jpg', 'image/jpeg')),
                'message' => __d('clients', 'Please upload images only (gif, png, jpg).')
            ],
            'fileSize' => [
                'rule' => array('fileSize', '<=', '1MB'),
                'message' => __d('clients', 'Logo image must be less than 1MB.')
            ],
        ])
        ->allowEmpty('logo');
  }

这是一个简单的 ImageUpload-Test 脚本，我在过去几天尝试过。 如果文件大小超过上传边界，则 mimeType 验证会导致异常。我不是指 fileSize 验证量。我的意思是 PHP.ini 中提到的值（在我的例子中是 upload_max_filesize=2M）。

如果我上传的文件大于 2MB，我会收到此异常

2016-02-25 18:33:56 Error: [RuntimeException] Cannot validate mimetype for a missing file
Request URL: /pam/clients/file
Referer URL: http://localhost/pam/clients/file
Stack Trace:
#0 [internal function]: Cake\Validation\Validation::mimeType(Array, Array)
#1 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\cakephp\cakephp\src\Validation\RulesProvider.php(71): ReflectionMethod->invokeArgs(NULL, Array)
#2 [internal function]: Cake\Validation\RulesProvider->__call('mimeType', Array)
#3 [internal function]: Cake\Validation\RulesProvider->mimeType(Array, Array, Array)
#4 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\cakephp\cakephp\src\Validation\ValidationRule.php(138): call_user_func_array(Array, Array)
#5 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\cakephp\cakephp\src\Validation\Validator.php(1410): Cake\Validation\ValidationRule->process(Array, Array, Array)
#6 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\cakephp\cakephp\src\Validation\Validator.php(137): Cake\Validation\Validator->_processRules('logo', Object(Cake\Validation\ValidationSet), Array, true)
#7 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\cakephp\cakephp\src\ORM\Marshaller.php(193): Cake\Validation\Validator->errors(Array, true)
#8 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\cakephp\cakephp\src\ORM\Marshaller.php(466): Cake\ORM\Marshaller->_validate(Array, Array, true)
#9 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\cakephp\cakephp\src\ORM\Table.php(2073): Cake\ORM\Marshaller->merge(Object(App\Model\Entity\Client), Array, Array)
#10 C:\Users\D052192\OneDrive\xampp\htdocs\pam\src\Controller\ClientsController.php(102): Cake\ORM\Table->patchEntity(Object(App\Model\Entity\Client), Array)
#11 [internal function]: App\Controller\ClientsController->file()
#12 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\friendsofcake\crud\src\Controller\ControllerTrait.php(51): call_user_func_array(Array, Array)
#13 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\cakephp\cakephp\src\Routing\Dispatcher.php(114): App\Controller\AppController->invokeAction()
#14 C:\Users\D052192\OneDrive\xampp\htdocs\pam\vendor\cakephp\cakephp\src\Routing\Dispatcher.php(87): Cake\Routing\Dispatcher->_invoke(Object(App\Controller\ClientsController))
#15 C:\Users\D052192\OneDrive\xampp\htdocs\pam\webroot\index.php(37): Cake\Routing\Dispatcher->dispatch(Object(Cake\Network\Request), Object(Cake\Network\Response))
#16 {main}

$this->request->data 中的值为：

Array
(
    [logo] => Array
        (
            [name] => Image6MB.jpg
            [type] => 
            [tmp_name] => 
            [error] => 1
            [size] => 0
        )
 )

如果 mimeType 检查在验证变量内，这种情况总是会引发异常。

public static function mimeType($check, $mimeTypes = [])
{
    if (is_array($check) && isset($check['tmp_name'])) {
        $check = $check['tmp_name'];
    }

    if (!function_exists('finfo_open')) {
        throw new LogicException('ext/fileinfo is required for validating file mime types');
    }

   if (!is_file($check)) {
        throw new RuntimeException('Cannot validate mimetype for a missing file');
    }

这应该是蛋糕核心测试中的测试用例。由于apache没有上传数据并将error设置为1。这应该由代码处理，不要抛出异常。

我进行了 3 次验证检查，但最终还是出现了异常。 uploadError 甚至无法显示，因为引发了异常。 mimeType 检查和 fileSize 检查只有在文件成功上传的情况下才能进行。

这种情况应该如何处理？

Answer 1

这是预期的行为，所有验证规则都在运行，无论前一个是否失败。因此，在您的情况下，将识别出上传错误，但验证仍将继续执行下一条规则，然后由于没有上传任何文件，该规则将失败。

可以使用last 选项禁用此行为。将规则标记为 last 将导致对该字段的验证停止，以防规则失败。

'uploadError' => [
    'rule' => 'uploadError',
    'message' => __d('clients', 'The logo upload failed.'),
    'last' => true
],

// ...

另请参阅Cookbook > Validation > Marking Rules as the Last to Run