审查视图

simplewind/vendor/symfony/http-foundation/File/UploadedFile.php 8.7 KB
景龙 authored
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268
<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpFoundation\File;

use Symfony\Component\HttpFoundation\File\Exception\FileException;
use Symfony\Component\HttpFoundation\File\Exception\FileNotFoundException;
use Symfony\Component\HttpFoundation\File\MimeType\ExtensionGuesser;

/**
 * A file uploaded through a form.
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 * @author Florian Eckerstorfer <florian@eckerstorfer.org>
 * @author Fabien Potencier <fabien@symfony.com>
 */
class UploadedFile extends File
{
    private $test = false;
    private $originalName;
    private $mimeType;
    private $size;
    private $error;

    /**
     * Accepts the information of the uploaded file as provided by the PHP global $_FILES.
     *
     * The file object is only created when the uploaded file is valid (i.e. when the
     * isValid() method returns true). Otherwise the only methods that could be called
     * on an UploadedFile instance are:
     *
     *   * getClientOriginalName,
     *   * getClientMimeType,
     *   * isValid,
     *   * getError.
     *
     * Calling any other method on an non-valid instance will cause an unpredictable result.
     *
     * @param string      $path         The full temporary path to the file
     * @param string      $originalName The original file name of the uploaded file
     * @param string|null $mimeType     The type of the file as provided by PHP; null defaults to application/octet-stream
     * @param int|null    $size         The file size provided by the uploader
     * @param int|null    $error        The error constant of the upload (one of PHP's UPLOAD_ERR_XXX constants); null defaults to UPLOAD_ERR_OK
     * @param bool        $test         Whether the test mode is active
     *                                  Local files are used in test mode hence the code should not enforce HTTP uploads
     *
     * @throws FileException         If file_uploads is disabled
     * @throws FileNotFoundException If the file does not exist
     */
    public function __construct($path, $originalName, $mimeType = null, $size = null, $error = null, $test = false)
    {
        $this->originalName = $this->getName($originalName);
        $this->mimeType = $mimeType ?: 'application/octet-stream';
        $this->size = $size;
        $this->error = $error ?: UPLOAD_ERR_OK;
        $this->test = (bool) $test;

        parent::__construct($path, UPLOAD_ERR_OK === $this->error);
    }

    /**
     * Returns the original file name.
     *
     * It is extracted from the request from which the file has been uploaded.
     * Then it should not be considered as a safe value.
     *
     * @return string|null The original name
     */
    public function getClientOriginalName()
    {
        return $this->originalName;
    }

    /**
     * Returns the original file extension.
     *
     * It is extracted from the original file name that was uploaded.
     * Then it should not be considered as a safe value.
     *
     * @return string The extension
     */
    public function getClientOriginalExtension()
    {
        return pathinfo($this->originalName, PATHINFO_EXTENSION);
    }

    /**
     * Returns the file mime type.
     *
     * The client mime type is extracted from the request from which the file
     * was uploaded, so it should not be considered as a safe value.
     *
     * For a trusted mime type, use getMimeType() instead (which guesses the mime
     * type based on the file content).
     *
     * @return string|null The mime type
     *
     * @see getMimeType()
     */
    public function getClientMimeType()
    {
        return $this->mimeType;
    }

    /**
     * Returns the extension based on the client mime type.
     *
     * If the mime type is unknown, returns null.
     *
     * This method uses the mime type as guessed by getClientMimeType()
     * to guess the file extension. As such, the extension returned
     * by this method cannot be trusted.
     *
     * For a trusted extension, use guessExtension() instead (which guesses
     * the extension based on the guessed mime type for the file).
     *
     * @return string|null The guessed extension or null if it cannot be guessed
     *
     * @see guessExtension()
     * @see getClientMimeType()
     */
    public function guessClientExtension()
    {
        $type = $this->getClientMimeType();
        $guesser = ExtensionGuesser::getInstance();

        return $guesser->guess($type);
    }

    /**
     * Returns the file size.
     *
     * It is extracted from the request from which the file has been uploaded.
     * Then it should not be considered as a safe value.
     *
     * @return int|null The file size
     */
    public function getClientSize()
    {
        return $this->size;
    }

    /**
     * Returns the upload error.
     *
     * If the upload was successful, the constant UPLOAD_ERR_OK is returned.
     * Otherwise one of the other UPLOAD_ERR_XXX constants is returned.
     *
     * @return int The upload error
     */
    public function getError()
    {
        return $this->error;
    }

    /**
     * Returns whether the file was uploaded successfully.
     *
     * @return bool True if the file has been uploaded with HTTP and no error occurred
     */
    public function isValid()
    {
        $isOk = UPLOAD_ERR_OK === $this->error;

        return $this->test ? $isOk : $isOk && is_uploaded_file($this->getPathname());
    }

    /**
     * Moves the file to a new location.
     *
     * @param string $directory The destination folder
     * @param string $name      The new file name
     *
     * @return File A File object representing the new file
     *
     * @throws FileException if, for any reason, the file could not have been moved
     */
    public function move($directory, $name = null)
    {
        if ($this->isValid()) {
            if ($this->test) {
                return parent::move($directory, $name);
            }

            $target = $this->getTargetFile($directory, $name);

            set_error_handler(function ($type, $msg) use (&$error) { $error = $msg; });
            $moved = move_uploaded_file($this->getPathname(), $target);
            restore_error_handler();
            if (!$moved) {
                throw new FileException(sprintf('Could not move the file "%s" to "%s" (%s)', $this->getPathname(), $target, strip_tags($error)));
            }

            @chmod($target, 0666 & ~umask());

            return $target;
        }

        throw new FileException($this->getErrorMessage());
    }

    /**
     * Returns the maximum size of an uploaded file as configured in php.ini.
     *
     * @return int The maximum size of an uploaded file in bytes
     */
    public static function getMaxFilesize()
    {
        $iniMax = strtolower(ini_get('upload_max_filesize'));

        if ('' === $iniMax) {
            return PHP_INT_MAX;
        }

        $max = ltrim($iniMax, '+');
        if (0 === strpos($max, '0x')) {
            $max = \intval($max, 16);
        } elseif (0 === strpos($max, '0')) {
            $max = \intval($max, 8);
        } else {
            $max = (int) $max;
        }

        switch (substr($iniMax, -1)) {
            case 't': $max *= 1024;
            // no break
            case 'g': $max *= 1024;
            // no break
            case 'm': $max *= 1024;
            // no break
            case 'k': $max *= 1024;
        }

        return $max;
    }

    /**
     * Returns an informative upload error message.
     *
     * @return string The error message regarding the specified error code
     */
    public function getErrorMessage()
    {
        static $errors = array(
            UPLOAD_ERR_INI_SIZE => 'The file "%s" exceeds your upload_max_filesize ini directive (limit is %d KiB).',
            UPLOAD_ERR_FORM_SIZE => 'The file "%s" exceeds the upload limit defined in your form.',
            UPLOAD_ERR_PARTIAL => 'The file "%s" was only partially uploaded.',
            UPLOAD_ERR_NO_FILE => 'No file was uploaded.',
            UPLOAD_ERR_CANT_WRITE => 'The file "%s" could not be written on disk.',
            UPLOAD_ERR_NO_TMP_DIR => 'File could not be uploaded: missing temporary directory.',
            UPLOAD_ERR_EXTENSION => 'File upload was stopped by a PHP extension.',
        );

        $errorCode = $this->error;
        $maxFilesize = UPLOAD_ERR_INI_SIZE === $errorCode ? self::getMaxFilesize() / 1024 : 0;
        $message = isset($errors[$errorCode]) ? $errors[$errorCode] : 'The file "%s" was not uploaded due to an unknown error.';

        return sprintf($message, $this->getClientOriginalName(), $maxFilesize);
    }
}