scratch – Blame information for rev 128
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Rev | Author | Line No. | Line |
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7 | office | 1 | <?php |
2 | |||
3 | ########################################################################### |
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4 | ## Copyright (C) Wizardry and Steamworks 2017 - License: GNU GPLv3 ## |
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5 | ########################################################################### |
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6 | |||
66 | office | 7 | require_once('php/pseudocrypt.php'); |
8 | require_once('php/functions.php'); |
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87 | office | 9 | require_once('vendor/autoload.php'); |
7 | office | 10 | |
67 | office | 11 | ### Load configuration. |
12 | $config = spyc_load_file('config.yaml'); |
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13 | |||
52 | office | 14 | #### POST -> upload / GET -> download |
15 | switch ($_SERVER['REQUEST_METHOD']) { |
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16 | case 'POST': |
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93 | office | 17 | #### Script restrictions. |
96 | office | 18 | session_start(); |
19 | if (empty($_POST['token']) || !hash_equals($_SESSION['token'], $_POST['token'])) { |
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93 | office | 20 | http_response_code(403); |
21 | die('Forbidden.'); |
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22 | } |
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52 | office | 23 | #### Retrieve uploaded file. |
24 | if (!empty($_FILES['file']) and |
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25 | is_uploaded_file($_FILES['file']['tmp_name'])) { |
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67 | office | 26 | if($_FILES['file']['size'] > $config['ALLOWED_ASSET_SIZE'] * 1048576) { |
81 | office | 27 | http_response_code(403); |
28 | die('File size exceeds '.$config['ALLOWED_ASSET_SIZE'].'MiB.'); |
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57 | office | 29 | } |
52 | office | 30 | # Regular multipart/form-data upload. |
31 | $name = $_FILES['file']['name']; |
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57 | office | 32 | $data = atomized_get_contents($_FILES['file']['tmp_name']); |
52 | office | 33 | } else { |
67 | office | 34 | if((int)get_file_size("php://input") > $config['ALLOWED_ASSET_SIZE'] * 1048576) { |
81 | office | 35 | http_response_code(403); |
36 | die('File size exceeds '.$config['ALLOWED_ASSET_SIZE'].'MiB.'); |
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57 | office | 37 | } |
52 | office | 38 | # Raw POST data. |
39 | $name = urldecode(@$_SERVER['HTTP_X_FILE_NAME']); |
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57 | office | 40 | $data = atomized_get_contents("php://input"); |
52 | office | 41 | } |
7 | office | 42 | |
52 | office | 43 | #### Grab the file extension. |
44 | $fileExtension = pathinfo($name, PATHINFO_EXTENSION); |
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11 | office | 45 | |
52 | office | 46 | #### If the extension is not allowed then change it to a text extension. |
47 | if (!isset($fileExtension) || |
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48 | !in_array(strtoupper($fileExtension), |
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67 | office | 49 | array_map('strtoupper', $config['ALLOWED_FILE_EXTENSIONS']))) { |
81 | office | 50 | http_response_code(403); |
51 | die('File extension not allowed.'); |
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52 | office | 52 | } |
14 | office | 53 | |
52 | office | 54 | #### Hash filename. |
55 | $file = strtolower( |
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56 | PseudoCrypt::hash( |
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57 | preg_replace( |
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58 | '/\D/', |
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59 | '', |
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60 | hash( |
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61 | 'sha512', |
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62 | $data |
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63 | ) |
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64 | ), |
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67 | office | 65 | $config['ASSET_HASH_SIZE'] |
7 | office | 66 | ) |
52 | office | 67 | ); |
14 | office | 68 | |
52 | office | 69 | #### Build the user path. |
70 | $userPath = join( |
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71 | DIRECTORY_SEPARATOR, |
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72 | array( |
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67 | office | 73 | $config['STORE_FOLDER'], |
52 | office | 74 | $file |
75 | ) |
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76 | ); |
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11 | office | 77 | |
102 | office | 78 | #### Check for path traversals. |
52 | office | 79 | $pathPart = pathinfo($userPath.'.'.$fileExtension); |
80 | if (strcasecmp( |
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67 | office | 81 | realpath($pathPart['dirname']), realpath($config['STORE_FOLDER'])) != 0) { |
81 | office | 82 | http_response_code(500); |
83 | die('Internal server error.'); |
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52 | office | 84 | } |
7 | office | 85 | |
52 | office | 86 | #### Store the file. |
81 | office | 87 | $timestamp = atomized_put_contents($userPath.'.'.$fileExtension, $data); |
125 | office | 88 | |
89 | ### Process any sent tags. |
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90 | if(isset($_POST['tags'])) { |
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91 | $tags = json_decode( |
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92 | stripslashes( |
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93 | $_POST['tags'] |
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94 | ) |
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95 | ); |
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96 | |||
97 | ## If we have any tags then insert them into the database. |
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98 | if(!empty($tags)) { |
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126 | office | 99 | ## Connect or create the scratch database. |
100 | $db = new PDO('sqlite:db/scratch.sqlite3'); |
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101 | ## Set the error mode to exceptions. |
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102 | $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); |
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125 | office | 103 | try { |
126 | office | 104 | |
125 | office | 105 | $db->beginTransaction(); |
126 | office | 106 | |
107 | ## Create tags table if it does not exist. |
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128 | office | 108 | $db->query('CREATE TABLE IF NOT EXISTS "tags" ("hash" text NOT NULL COLLATE NOCASE, "tag" text COLLATE NOCASE, UNIQUE("hash", "tag") ON CONFLICT REPLACE)'); |
126 | office | 109 | |
110 | ## Now add all the tags. |
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125 | office | 111 | foreach($tags as $tag) { |
126 | office | 112 | $q = $db->prepare('REPLACE INTO "tags" ("hash", "tag") VALUES(:hash, :tag)'); |
113 | $q->bindParam(':hash', $file); |
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114 | $q->bindParam(':tag', $tag); |
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115 | $q->execute(); |
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125 | office | 116 | } |
117 | $db->commit(); |
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118 | } catch (Exception $e) { |
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126 | office | 119 | error_log($e); |
125 | office | 120 | ## Rollback. |
121 | $db->rollback(); |
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122 | } |
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123 | } |
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124 | } |
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14 | office | 125 | |
90 | office | 126 | ### Hook for various file extensions. |
127 | $opengraph = FALSE; |
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128 | switch(strtoupper($fileExtension)) { |
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103 | office | 129 | case 'MP4': |
90 | office | 130 | case 'GIF': |
131 | $opengraph = TRUE; |
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132 | break; |
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133 | } |
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125 | office | 134 | |
52 | office | 135 | ### Return the URL to the file. |
136 | header('Content-Type: text/plain; charset=utf-8'); |
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81 | office | 137 | echo json_encode( |
138 | array( |
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139 | "hash" => $file, |
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90 | office | 140 | "timestamp" => $timestamp, |
141 | "opengraph" => $opengraph |
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81 | office | 142 | ) |
143 | ); |
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52 | office | 144 | break; |
145 | case 'GET': |
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83 | office | 146 | ### Tell browser not to cache files. |
147 | header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0"); |
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148 | header("Cache-Control: post-check=0, pre-check=0", false); |
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149 | header("Pragma: no-cache"); |
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150 | |||
52 | office | 151 | ### If no file has been specified for download then return. |
81 | office | 152 | if (!isset($_GET['hash']) or empty($_GET['hash'])) { |
153 | http_response_code(404); |
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154 | die('File not found.'); |
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52 | office | 155 | } |
156 | |||
53 | office | 157 | ### Find the requested file. |
52 | office | 158 | $file = array_shift( |
159 | preg_grep( |
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81 | office | 160 | '/'.$_GET['hash'].'/', |
67 | office | 161 | scandir($config['STORE_FOLDER']) |
52 | office | 162 | ) |
163 | ); |
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164 | |||
81 | office | 165 | if (!isset($file) or empty($file)) { |
166 | http_response_code(404); |
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167 | die('File not found.'); |
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168 | } |
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53 | office | 169 | |
170 | ### Check the path for path traversals. |
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171 | $fileExtension = pathinfo($file, PATHINFO_EXTENSION); |
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52 | office | 172 | |
53 | office | 173 | #### If the extension is not allowed then return. |
174 | if (!isset($fileExtension) || |
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175 | !in_array(strtoupper($fileExtension), |
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67 | office | 176 | array_map('strtoupper', $config['ALLOWED_FILE_EXTENSIONS']))) { |
81 | office | 177 | http_response_code(403); |
178 | die('File extension not allowed.'); |
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52 | office | 179 | } |
53 | office | 180 | |
181 | #### Build the user path. |
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182 | $userPath = join( |
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183 | DIRECTORY_SEPARATOR, |
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184 | array( |
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67 | office | 185 | $config['STORE_FOLDER'], |
53 | office | 186 | $file |
187 | ) |
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188 | ); |
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52 | office | 189 | |
53 | office | 190 | #### Check for path traversals |
191 | $pathPart = pathinfo($userPath); |
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192 | if (strcasecmp( |
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67 | office | 193 | realpath($pathPart['dirname']), realpath($config['STORE_FOLDER'])) != 0) { |
81 | office | 194 | http_response_code(500); |
195 | die('Internal server error.'); |
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53 | office | 196 | } |
197 | |||
83 | office | 198 | ### Hook for various file extensions. |
53 | office | 199 | switch(strtoupper($fileExtension)) { |
200 | case "HTML": |
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201 | case "HTM": |
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202 | header('Content-type: text/html'); |
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203 | break; |
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204 | break; |
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83 | office | 205 | case "URL": |
91 | office | 206 | if(preg_match( |
207 | "/URL=(https?:\/\/[\-_\.\+!\*'\(\),a-zA-Z0-9]+:?[0-9]{0,5}\/.*?)\n/", |
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208 | file_get_contents($userPath), $matches)) { |
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83 | office | 209 | header('Location: '.$matches[1]); |
210 | return; |
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211 | } |
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212 | break; |
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53 | office | 213 | default: |
214 | ### Open MIME info database and send the content type. |
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215 | $finfo = finfo_open(FILEINFO_MIME_TYPE); |
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216 | if (!$finfo) { |
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81 | office | 217 | http_response_code(500); |
218 | die('Internal server error.'); |
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53 | office | 219 | } |
220 | header('Content-type: '.finfo_file($finfo, $userPath)); |
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221 | finfo_close($finfo); |
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222 | break; |
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223 | } |
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224 | |||
52 | office | 225 | ### Send the file along with the inline content disposition. |
53 | office | 226 | header('Content-length: '.(int)get_file_size($userPath)); |
227 | header('Content-Disposition: inline; filename="' . basename($userPath) . '"'); |
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228 | header('Content-Transfer-Encoding: binary'); |
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229 | header('X-Sendfile: '.$userPath); |
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52 | office | 230 | break; |
231 | } |