Mercurial > prosody-modules
annotate mod_http_upload_external/share_v2.php @ 3788:14028430638b
mod_easy_invite: Change command name to 'generate' (from 'register')
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 30 Dec 2019 12:04:35 +0000 |
parents | bada43f3a546 |
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mod_http_upload_external: Add newer 'v2' protocol (and share_v2.php) which supports content-type preservation
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1 <?php |
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2 |
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3 /* |
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4 PHP script to handle file uploads and downloads for Prosody's mod_http_upload_external |
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5 |
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6 Tested with Apache 2.2+ and PHP 5.3+ |
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7 |
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8 ** Why this script? |
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9 |
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10 This script only allows uploads that have been authorized by mod_http_upload_external. It |
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11 attempts to make the upload/download as safe as possible, considering that there are *many* |
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12 security concerns involved with allowing arbitrary file upload/download on a web server. |
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13 |
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14 With that said, I do not consider myself a PHP developer, and at the time of writing, this |
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15 code has had no external review. Use it at your own risk. I make no claims that this code |
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16 is secure. |
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17 |
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18 ** How to use? |
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19 |
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20 Drop this file somewhere it will be served by your web server. Edit the config options below. |
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21 |
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22 In Prosody set: |
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24 http_upload_external_base_url = "https://your.example.com/path/to/share.php/" |
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25 http_upload_external_secret = "this is your secret string" |
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26 http_upload_external_protocol = "v2"; |
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27 |
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28 ** License |
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29 |
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30 (C) 2016 Matthew Wild <mwild1@gmail.com> |
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31 |
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32 Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
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33 and associated documentation files (the "Software"), to deal in the Software without restriction, |
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34 including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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35 and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, |
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36 subject to the following conditions: |
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37 |
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38 The above copyright notice and this permission notice shall be included in all copies or substantial |
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39 portions of the Software. |
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40 |
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41 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
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42 BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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43 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
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44 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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45 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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46 |
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47 */ |
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48 |
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49 /*\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\*/ |
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50 /* CONFIGURATION OPTIONS */ |
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51 /*\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\*/ |
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52 |
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53 /* Change this to a directory that is writable by your web server, but is outside your web root */ |
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54 $CONFIG_STORE_DIR = '/tmp'; |
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55 |
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56 /* This must be the same as 'http_upload_external_secret' that you set in Prosody's config file */ |
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57 $CONFIG_SECRET = 'this is your secret string'; |
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58 |
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59 /* For people who need options to tweak that they don't understand... here you are */ |
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60 $CONFIG_CHUNK_SIZE = 4096; |
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61 |
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62 /*\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\*/ |
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63 /* END OF CONFIGURATION */ |
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64 /*\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\*/ |
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65 |
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66 /* Do not edit below this line unless you know what you are doing (spoiler: nobody does) */ |
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67 |
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68 $upload_file_name = substr($_SERVER['PHP_SELF'], strlen($_SERVER['SCRIPT_NAME'])+1); |
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69 $store_file_name = $CONFIG_STORE_DIR . '/store-' . hash('sha256', $upload_file_name); |
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70 |
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71 $request_method = $_SERVER['REQUEST_METHOD']; |
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72 |
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73 /* Set CORS headers */ |
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74 header('Access-Control-Allow-Methods: GET, PUT, OPTIONS'); |
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75 header('Access-Control-Allow-Headers: Content-Type'); |
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76 header('Access-Control-Max-Age: 7200'); |
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77 header('Access-Control-Allow-Origin: *'); |
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78 |
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79 if(array_key_exists('v2', $_GET) === TRUE && $request_method === 'PUT') { |
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80 // error_log(var_export($_SERVER, TRUE)); |
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81 $upload_file_size = $_SERVER['CONTENT_LENGTH']; |
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82 $upload_token = $_GET['v2']; |
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83 |
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84 if(array_key_exists('CONTENT_TYPE', $_SERVER) === TRUE) { |
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85 $upload_file_type = $_SERVER['CONTENT_TYPE']; |
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86 } else { |
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87 $upload_file_type = 'application/octet-stream'; |
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88 } |
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89 |
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90 // Imagine being able to store the file data in the content-type! |
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91 if(strlen($upload_file_type) > 255) { |
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92 header('HTTP/1.0 400 Bad Request'); |
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93 exit; |
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94 } |
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95 |
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96 $calculated_token = hash_hmac('sha256', "$upload_file_name\0$upload_file_size\0$upload_file_type", $CONFIG_SECRET); |
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97 if(function_exists('hash_equals')) { |
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98 if(hash_equals($calculated_token, $upload_token) !== TRUE) { |
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99 error_log("Token mismatch: calculated $calculated_token got $upload_token"); |
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100 header('HTTP/1.0 403 Forbidden'); |
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101 exit; |
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102 } |
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103 } |
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104 else { |
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105 if($upload_token !== $calculated_token) { |
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106 error_log("Token mismatch: calculated $calculated_token got $upload_token"); |
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107 header('HTTP/1.0 403 Forbidden'); |
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108 exit; |
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109 } |
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110 } |
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111 /* Open a file for writing */ |
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112 $store_file = fopen($store_file_name, 'x'); |
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113 |
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114 if($store_file === FALSE) { |
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115 header('HTTP/1.0 409 Conflict'); |
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116 exit; |
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117 } |
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118 |
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119 /* PUT data comes in on the stdin stream */ |
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120 $incoming_data = fopen('php://input', 'r'); |
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121 |
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122 /* Read the data a chunk at a time and write to the file */ |
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123 while ($data = fread($incoming_data, $CONFIG_CHUNK_SIZE)) { |
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124 fwrite($store_file, $data); |
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125 } |
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126 |
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127 /* Close the streams */ |
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128 fclose($incoming_data); |
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129 fclose($store_file); |
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130 file_put_contents($store_file_name.'-type', $upload_file_type); |
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131 } else if($request_method === 'GET' || $request_method === 'HEAD') { |
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132 // Send file (using X-Sendfile would be nice here...) |
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133 if(file_exists($store_file_name)) { |
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134 $mime_type = file_get_contents($store_file_name.'-type'); |
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135 if($mime_type === FALSE) { |
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136 $mime_type = 'application/octet-stream'; |
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137 header('Content-Disposition: attachment'); |
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138 } |
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139 header('Content-Type: '.$mime_type); |
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140 header('Content-Length: '.filesize($store_file_name)); |
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141 header("Content-Security-Policy: \"default-src 'none'\""); |
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142 header("X-Content-Security-Policy: \"default-src 'none'\""); |
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143 header("X-WebKit-CSP: \"default-src 'none'\""); |
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144 if($request_method !== 'HEAD') { |
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145 readfile($store_file_name); |
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146 } |
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147 } else { |
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148 header('HTTP/1.0 404 Not Found'); |
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149 } |
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150 } else if($request_method === 'OPTIONS') { |
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151 } else { |
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152 header('HTTP/1.0 400 Bad Request'); |
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153 } |
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154 |
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155 exit; |