1 | <?php |
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2 | |||
3 | namespace Backend\Modules\MediaLibrary\Component; |
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4 | |||
5 | use Backend\Modules\MediaLibrary\Manager\FileManager; |
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6 | use Exception; |
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7 | use Symfony\Component\HttpFoundation\File\MimeType\MimeTypeExtensionGuesser; |
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8 | use Symfony\Component\HttpFoundation\File\UploadedFile; |
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9 | use Symfony\Component\HttpFoundation\Request; |
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10 | |||
11 | class UploadHandler |
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12 | { |
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13 | public $allowedExtensions = []; |
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14 | public $allowedMimeTypes = []; |
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15 | public $sizeLimit = null; |
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16 | public $inputName = 'qqfile'; |
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17 | public $chunksFolder = 'chunks'; |
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18 | |||
19 | public $chunksCleanupProbability = 0.001; // Once in 1000 requests on avg |
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20 | public $chunksExpireIn = 604800; // One week |
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21 | |||
22 | /** @var string */ |
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23 | protected $uploadName; |
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24 | |||
25 | /** @var Request */ |
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26 | protected $request; |
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27 | |||
28 | /** @var FileManager */ |
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29 | protected $fileManager; |
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30 | |||
31 | public function __construct(Request $request, FileManager $fileManager) |
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32 | { |
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33 | $this->request = $request; |
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34 | $this->fileManager = $fileManager; |
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35 | } |
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36 | |||
37 | public function getName(): string |
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38 | { |
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39 | $fileName = basename($this->request->request->get('qqfilename')); |
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40 | if ($fileName !== null) { |
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41 | return $fileName; |
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42 | } |
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43 | |||
44 | /** @var UploadedFile|null $file */ |
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45 | $file = $this->request->files->get($this->inputName); |
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46 | if ($file instanceof UploadedFile) { |
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47 | return basename($file->getClientOriginalName()); |
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48 | } |
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49 | } |
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50 | |||
51 | public function getUploadName(): string |
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52 | { |
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53 | return $this->uploadName; |
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54 | } |
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55 | |||
56 | public function combineChunks(string $uploadDirectory, string $name = null): array |
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57 | { |
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58 | $uuid = $this->request->request->get('qquuid'); |
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59 | if ($name === null) { |
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60 | $name = $this->getName(); |
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61 | } |
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62 | $targetFolder = $this->chunksFolder . DIRECTORY_SEPARATOR . $uuid; |
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63 | $totalParts = $this->request->request->getInt('qqtotalparts', 1); |
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64 | |||
65 | $targetPath = implode(DIRECTORY_SEPARATOR, [$uploadDirectory, $uuid, $name]); |
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66 | $this->uploadName = $name; |
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67 | |||
68 | if (!$this->fileManager->exists($targetPath)) { |
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69 | mkdir(dirname($targetPath), 0777, true); |
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70 | } |
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71 | $target = fopen($targetPath, 'wb'); |
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72 | |||
73 | for ($i = 0; $i < $totalParts; ++$i) { |
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74 | $chunk = fopen($targetFolder . DIRECTORY_SEPARATOR . $i, 'rb'); |
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75 | stream_copy_to_stream($chunk, $target); |
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76 | fclose($chunk); |
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77 | } |
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78 | |||
79 | // Success |
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80 | fclose($target); |
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81 | |||
82 | for ($i = 0; $i < $totalParts; ++$i) { |
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83 | unlink($targetFolder . DIRECTORY_SEPARATOR . $i); |
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84 | } |
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85 | |||
86 | rmdir($targetFolder); |
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87 | |||
88 | if ($this->sizeLimit !== null && filesize($targetPath) > $this->sizeLimit) { |
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89 | unlink($targetPath); |
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90 | http_response_code(413); |
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91 | |||
92 | return ['success' => false, 'uuid' => $uuid, 'preventRetry' => true]; |
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93 | } |
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94 | |||
95 | return ['success' => true, 'uuid' => $uuid]; |
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96 | } |
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97 | |||
98 | public function handleUpload(string $uploadDirectory, string $name = null): array |
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99 | { |
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100 | $this->cleanupChunksIfNecessary(); |
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101 | |||
102 | try { |
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103 | $this->checkMaximumSize(); |
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104 | $this->checkUploadDirectory($uploadDirectory); |
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105 | $this->checkType(); |
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106 | $file = $this->getFile($uploadDirectory); |
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107 | $size = $this->getSize($file); |
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108 | |||
109 | if ($this->sizeLimit !== null && $size > $this->sizeLimit) { |
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110 | return ['error' => 'File is too large.', 'preventRetry' => true]; |
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111 | } |
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112 | |||
113 | $name = $this->getRedefinedName($name); |
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114 | $this->checkFileExtension($name); |
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115 | if ($this->request->request->getInt('qqtotalparts', 1) === 1) { |
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116 | $this->checkFileMimeType($file); |
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117 | } |
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118 | } catch (Exception $e) { |
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119 | return ['error' => $e->getMessage()]; |
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120 | } |
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121 | |||
122 | $uuid = $this->request->request->get('qquuid'); |
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123 | |||
124 | // Chunked upload |
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125 | if ($this->request->request->getInt('qqtotalparts', 1) > 1) { |
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126 | if ($this->request->query->has('done')) { |
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127 | return ['success' => true, 'uuid' => $uuid]; |
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128 | } |
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129 | $chunksFolder = $this->chunksFolder; |
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130 | $partIndex = $this->request->request->getInt('qqpartindex'); |
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131 | |||
132 | if (!is_writable($chunksFolder) && !is_executable($uploadDirectory)) { |
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133 | return ['error' => "Server error. Chunks directory isn't writable or executable."]; |
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134 | } |
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135 | |||
136 | $targetFolder = $this->chunksFolder . DIRECTORY_SEPARATOR . $uuid; |
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137 | |||
138 | if (!file_exists($targetFolder)) { |
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139 | mkdir($targetFolder, 0777, true); |
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140 | } |
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141 | |||
142 | $target = $targetFolder . '/' . $partIndex; |
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143 | $from = $file->getRealPath(); |
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144 | $success = move_uploaded_file($from, $target); |
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145 | |||
146 | return ['success' => $success, 'uuid' => $uuid]; |
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147 | } |
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148 | |||
149 | // Non-chunked upload |
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150 | $target = implode(DIRECTORY_SEPARATOR, [$uploadDirectory, $uuid, $name]); |
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151 | |||
152 | if ($target) { |
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153 | $this->uploadName = basename($target); |
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154 | |||
155 | if (!is_dir(dirname($target))) { |
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156 | mkdir(dirname($target), 0777, true); |
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157 | } |
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158 | if (move_uploaded_file($file->getRealPath(), $target)) { |
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159 | return ['success' => true, 'uuid' => $uuid]; |
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160 | } |
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161 | } |
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162 | |||
163 | return ['error' => 'Could not save uploaded file.' . 'The upload was cancelled, or server error encountered']; |
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164 | } |
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165 | |||
166 | private function checkMaximumSize(): void |
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167 | { |
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168 | // Check that the max upload size specified in class configuration does not exceed size allowed by server config |
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169 | if ($this->toBytes(ini_get('post_max_size')) < $this->sizeLimit || |
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170 | $this->toBytes(ini_get('upload_max_filesize')) < $this->sizeLimit |
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171 | ) { |
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172 | $neededRequestSize = max(1, $this->sizeLimit / 1024 / 1024) . 'M'; |
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173 | |||
174 | throw new Exception( |
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175 | 'Server error. Increase post_max_size and upload_max_filesize to ' . $neededRequestSize |
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176 | ); |
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177 | } |
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178 | } |
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179 | |||
180 | /** |
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181 | * Determines whether a directory can be accessed. |
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182 | * |
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183 | * is_executable() is not reliable on Windows prior PHP 5.0.0 |
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184 | * (http://www.php.net/manual/en/function.is-executable.php) |
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185 | * The following tests if the current OS is Windows and if so, merely |
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186 | * checks if the folder is writable; |
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187 | * otherwise, it checks additionally for executable status (like before). |
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188 | * |
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189 | * @param string $uploadDirectory |
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190 | * |
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191 | * @throws Exception |
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192 | */ |
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193 | private function checkUploadDirectory(string $uploadDirectory): void |
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194 | { |
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195 | if (($this->isWindows() && !is_writable($uploadDirectory)) |
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196 | || (!is_writable($uploadDirectory) && !is_executable($uploadDirectory))) { |
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197 | throw new Exception('Server error. Uploads directory isn\'t writable'); |
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198 | } |
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199 | } |
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200 | |||
201 | private function checkType(): void |
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202 | { |
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203 | $type = $this->request->server->get('HTTP_CONTENT_TYPE', $this->request->server->get('CONTENT_TYPE')); |
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204 | if ($type === null) { |
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205 | throw new Exception('No files were uploaded.'); |
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206 | } |
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207 | |||
208 | if (strpos(strtolower($type), 'multipart/') !== 0 && !$this->request->query->has('done')) { |
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209 | throw new Exception( |
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210 | 'Server error. Not a multipart request. Please set forceMultipart to default value (true).' |
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211 | ); |
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212 | } |
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213 | } |
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214 | |||
215 | private function checkFileExtension(string $name): void |
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216 | { |
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217 | // Validate file extension |
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218 | $pathinfo = pathinfo($name); |
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219 | $ext = $pathinfo['extension'] ?? ''; |
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220 | |||
221 | // Check file extension |
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222 | if (!in_array(strtolower($ext), array_map('strtolower', $this->allowedExtensions), true)) { |
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223 | $these = implode(', ', $this->allowedExtensions); |
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224 | throw new Exception('File has an invalid extension, it should be one of ' . $these . '.'); |
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225 | } |
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226 | } |
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227 | |||
228 | private function checkFileMimeType(UploadedFile $file): void |
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229 | { |
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230 | // Check file mime type |
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231 | if (!in_array(strtolower($file->getMimeType()), array_map('strtolower', $this->allowedMimeTypes), true)) { |
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232 | $these = implode(', ', $this->allowedMimeTypes); |
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233 | throw new Exception('File has an invalid mime type, it should be one of ' . $these . '.'); |
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234 | } |
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235 | } |
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236 | |||
237 | /** |
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238 | * Deletes all file parts in the chunks folder for files uploaded |
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239 | * more than chunksExpireIn seconds ago |
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240 | */ |
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241 | private function cleanupChunksIfNecessary(): void |
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242 | { |
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243 | if (!is_writable($this->chunksFolder) || 1 !== random_int(1, 1 / $this->chunksCleanupProbability)) { |
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244 | return; |
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245 | } |
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246 | |||
247 | foreach (scandir($this->chunksFolder) as $item) { |
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248 | if ($item === '.' || $item === '..') { |
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249 | continue; |
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250 | } |
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251 | |||
252 | $path = $this->chunksFolder . DIRECTORY_SEPARATOR . $item; |
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253 | |||
254 | if (!is_dir($path)) { |
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255 | continue; |
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256 | } |
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257 | |||
258 | if (time() - filemtime($path) > $this->chunksExpireIn) { |
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259 | $this->fileManager->deleteFolder($path); |
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260 | } |
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261 | } |
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262 | } |
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263 | |||
264 | private function getFile(string $uploadDirectory): UploadedFile |
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265 | { |
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266 | if ($this->request->query->has('done')) { |
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267 | $name = basename($this->getName()); |
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268 | $uploadedPath = implode( |
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269 | DIRECTORY_SEPARATOR, |
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270 | [$uploadDirectory, basename($this->request->request->get('qquuid')), $name] |
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271 | ); |
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272 | $mimeType = (new MimeTypeExtensionGuesser())->guess($uploadedPath); |
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273 | |||
274 | return new UploadedFile($uploadedPath, $name, $mimeType, filesize($uploadedPath)); |
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275 | } |
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276 | |||
277 | /** @var UploadedFile|null $file */ |
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278 | $file = $this->request->files->get($this->inputName); |
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279 | |||
280 | // check file error |
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281 | if (!$file instanceof UploadedFile) { |
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282 | throw new Exception('Upload Error #UNKNOWN'); |
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283 | } |
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284 | |||
285 | return $file; |
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286 | } |
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287 | |||
288 | private function getRedefinedName(string $name = null): string |
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289 | { |
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290 | if ($name === null) { |
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291 | $name = $this->getName(); |
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292 | } |
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293 | |||
294 | // Validate name |
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295 | if ($name === null || $name === '') { |
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296 | throw new Exception('File name empty.'); |
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297 | } |
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298 | |||
299 | return $name; |
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300 | } |
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301 | |||
302 | private function getSize(UploadedFile $file): int |
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303 | { |
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304 | $size = (int) $this->request->request->get('qqtotalfilesize', $file->getClientSize()); |
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305 | |||
306 | // Validate file size |
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307 | if ($size === 0) { |
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308 | throw new Exception('File is empty.'); |
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309 | } |
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310 | |||
311 | return $size; |
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312 | } |
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313 | |||
314 | /** |
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315 | * Determines is the OS is Windows or not |
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316 | * |
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317 | * @return bool |
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318 | */ |
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319 | protected function isWindows(): bool |
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320 | { |
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321 | return 0 === stripos(PHP_OS, 'WIN'); |
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322 | } |
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323 | |||
324 | /** |
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325 | * Converts a given size with units to bytes. |
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326 | * |
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327 | * @param string $str |
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328 | * |
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329 | * @return int |
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330 | */ |
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331 | protected function toBytes(string $str): int |
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332 | { |
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333 | $str = trim($str); |
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334 | $unit = strtolower($str[strlen($str) - 1]); |
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335 | if (is_numeric($unit)) { |
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336 | return (int) $str; |
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337 | } |
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338 | |||
339 | $val = (int) substr($str, 0, -1); |
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340 | switch (strtoupper($unit)) { |
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341 | case 'G': |
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342 | return $val * 1073741824; |
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343 | case 'M': |
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344 | return $val * 1048576; |
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345 | case 'K': |
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346 | return $val * 1024; |
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347 | default: |
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348 | return $val; |
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349 | } |
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350 | } |
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351 | } |
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352 |