Révision ac1bc5de
Ajouté par Assos Assos il y a plus de 9 ans
| drupal7/sites/all/modules/captcha/image_captcha/image_captcha.module | ||
|---|---|---|
| 16 | 16 |
define('IMAGE_CAPTCHA_FILE_FORMAT_PNG', 2);
|
| 17 | 17 |
define('IMAGE_CAPTCHA_FILE_FORMAT_TRANSPARENT_PNG', 3);
|
| 18 | 18 |
|
| 19 |
|
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| 20 | 19 |
/** |
| 21 | 20 |
* Implements hook_help(). |
| 22 | 21 |
*/ |
| ... | ... | |
| 33 | 32 |
*/ |
| 34 | 33 |
function image_captcha_menu() {
|
| 35 | 34 |
$items = array(); |
| 36 |
// add an administration tab for image_captcha
|
|
| 35 |
// Add an administration tab for image_captcha.
|
|
| 37 | 36 |
$items['admin/config/people/captcha/image_captcha'] = array( |
| 38 | 37 |
'title' => 'Image CAPTCHA', |
| 39 | 38 |
'file' => 'image_captcha.admin.inc', |
| ... | ... | |
| 50 | 49 |
'access arguments' => array('administer CAPTCHA settings'),
|
| 51 | 50 |
'type' => MENU_CALLBACK, |
| 52 | 51 |
); |
| 53 |
// callback for generating an image
|
|
| 52 |
// Callback for generating an image.
|
|
| 54 | 53 |
$items['image_captcha'] = array( |
| 55 | 54 |
'file' => 'image_captcha.user.inc', |
| 56 | 55 |
'page callback' => 'image_captcha_image', |
| ... | ... | |
| 63 | 62 |
/** |
| 64 | 63 |
* Helper function for getting the fonts to use in the image CAPTCHA. |
| 65 | 64 |
* |
| 66 |
* @return a list of font paths. |
|
| 65 |
* @return array |
|
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* a list of font paths. |
|
| 67 | 67 |
*/ |
| 68 | 68 |
function _image_captcha_get_enabled_fonts() {
|
| 69 | 69 |
if (IMAGE_CAPTCHA_ERROR_NO_TTF_SUPPORT & _image_captcha_check_setup(FALSE)) {
|
| ... | ... | |
| 81 | 81 |
/** |
| 82 | 82 |
* Helper function for checking if the specified fonts are available. |
| 83 | 83 |
* |
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* @param $fonts paths of fonts to check. |
|
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* @return list($readable_fonts, $problem_fonts) |
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* @param array $fonts |
|
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* paths of fonts to check. |
|
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* |
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* @return array |
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* list($readable_fonts, $problem_fonts) |
|
| 86 | 89 |
*/ |
| 87 | 90 |
function _image_captcha_check_fonts($fonts) {
|
| 88 | 91 |
$readable_fonts = array(); |
| ... | ... | |
| 100 | 103 |
|
| 101 | 104 |
/** |
| 102 | 105 |
* Helper function for splitting an utf8 string correctly in characters. |
| 106 |
* |
|
| 103 | 107 |
* Assumes the given utf8 string is well formed. |
| 104 | 108 |
* See http://en.wikipedia.org/wiki/Utf8 for more info |
| 105 | 109 |
*/ |
| 106 | 110 |
function _image_captcha_utf8_split($str) {
|
| 107 | 111 |
$characters = array(); |
| 108 | 112 |
$len = strlen($str); |
| 109 |
for ($i=0; $i < $len; ) {
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| 113 |
for ($i = 0; $i < $len;) {
|
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| 110 | 114 |
$chr = ord($str[$i]); |
| 111 |
if (($chr & 0x80) == 0x00) { // one byte character (0zzzzzzz)
|
|
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// One byte character (0zzzzzzz) |
|
| 116 |
if (($chr & 0x80) == 0x00) {
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| 112 | 117 |
$width = 1; |
| 113 | 118 |
} |
| 114 | 119 |
else {
|
| 115 |
if (($chr & 0xE0) == 0xC0) { // two byte character (first byte: 110yyyyy)
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// Two byte character (first byte: 110yyyyy) |
|
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if (($chr & 0xE0) == 0xC0) {
|
|
| 116 | 122 |
$width = 2; |
| 117 | 123 |
} |
| 118 |
elseif (($chr & 0xF0) == 0xE0) { // three byte character (first byte: 1110xxxx)
|
|
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// Three byte character (first byte: 1110xxxx) |
|
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elseif (($chr & 0xF0) == 0xE0) {
|
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| 119 | 126 |
$width = 3; |
| 120 | 127 |
} |
| 121 |
elseif (($chr & 0xF8) == 0xF0) { // four byte character (first byte: 11110www)
|
|
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// Four byte character (first byte: 11110www) |
|
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elseif (($chr & 0xF8) == 0xF0) {
|
|
| 122 | 130 |
$width = 4; |
| 123 | 131 |
} |
| 124 | 132 |
else {
|
| ... | ... | |
| 140 | 148 |
* font files should be readable. |
| 141 | 149 |
* This functions checks these things. |
| 142 | 150 |
* |
| 143 |
* @param $check_fonts whether or not the enabled fonts should be checked. |
|
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* @param bool $check_fonts |
|
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* whether or not the enabled fonts should be checked. |
|
| 144 | 153 |
* |
| 145 |
* @return status code: bitwise 'OR' of status flags like |
|
| 154 |
* @return int |
|
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* status code: bitwise 'OR' of status flags like |
|
| 146 | 156 |
* IMAGE_CAPTCHA_ERROR_NO_GDLIB, IMAGE_CAPTCHA_ERROR_NO_TTF_SUPPORT, |
| 147 | 157 |
* IMAGE_CAPTCHA_ERROR_TTF_FILE_READ_PROBLEM. |
| 148 | 158 |
*/ |
| 149 |
function _image_captcha_check_setup($check_fonts=TRUE) {
|
|
| 159 |
function _image_captcha_check_setup($check_fonts = TRUE) {
|
|
| 150 | 160 |
// Start clean. |
| 151 | 161 |
$status = 0; |
| 152 | 162 |
// Check if we can use the GD library. |
| ... | ... | |
| 170 | 180 |
} |
| 171 | 181 |
|
| 172 | 182 |
/** |
| 173 |
* Helper function for calculating image height and width |
|
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* based on given code and current font/spacing settings. |
|
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* Helper function for calculating image height and width based on given code and current font/spacing settings. |
|
| 175 | 184 |
* |
| 176 |
* @return array($width, $heigh) |
|
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* @return array |
|
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* array($width, $heigh) |
|
| 177 | 187 |
*/ |
| 178 | 188 |
function _image_captcha_image_size($code) {
|
| 179 |
// Get settings |
|
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// Get settings.
|
|
| 180 | 190 |
$font_size = (int) variable_get('image_captcha_font_size', 30);
|
| 181 | 191 |
$character_spacing = (float) variable_get('image_captcha_character_spacing', '1.2');
|
| 182 | 192 |
$characters = _image_captcha_utf8_split($code); |
| 183 | 193 |
$character_quantity = count($characters); |
| 184 | 194 |
|
| 185 |
// Calculate height and width |
|
| 195 |
// Calculate height and width.
|
|
| 186 | 196 |
$width = $character_spacing * $font_size * $character_quantity; |
| 187 | 197 |
$height = 2 * $font_size; |
| 188 | 198 |
|
| 189 | 199 |
return array($width, $height); |
| 190 | 200 |
} |
| 191 | 201 |
|
| 192 |
|
|
| 193 | 202 |
/** |
| 194 | 203 |
* Implements hook_captcha(). |
| 195 | 204 |
*/ |
| 196 |
function image_captcha_captcha($op, $captcha_type='', $captcha_sid=NULL) {
|
|
| 205 |
function image_captcha_captcha($op, $captcha_type = '', $captcha_sid = NULL) {
|
|
| 197 | 206 |
switch ($op) {
|
| 198 | 207 |
case 'list': |
| 199 | 208 |
// Only offer the image CAPTCHA if it is possible to generate an image on this setup. |
| ... | ... | |
| 214 | 223 |
if (variable_get('maintenance_mode', 0) && $user->uid == 0) {
|
| 215 | 224 |
return captcha_captcha('generate', 'Math');
|
| 216 | 225 |
} |
| 217 |
// generate a CAPTCHA code
|
|
| 226 |
// Generate a CAPTCHA code.
|
|
| 218 | 227 |
$allowed_chars = _image_captcha_utf8_split(variable_get('image_captcha_image_allowed_chars', IMAGE_CAPTCHA_ALLOWED_CHARACTERS));
|
| 219 |
$code_length = (int)variable_get('image_captcha_code_length', 5);
|
|
| 228 |
$code_length = (int) variable_get('image_captcha_code_length', 5);
|
|
| 220 | 229 |
$code = ''; |
| 221 | 230 |
for ($i = 0; $i < $code_length; $i++) {
|
| 222 | 231 |
$code .= $allowed_chars[array_rand($allowed_chars)]; |
| 223 | 232 |
} |
| 224 | 233 |
|
| 225 |
// build the result to return
|
|
| 234 |
// Build the result to return.
|
|
| 226 | 235 |
$result = array(); |
| 227 | 236 |
|
| 228 | 237 |
$result['solution'] = $code; |
| ... | ... | |
| 241 | 250 |
$result['form']['captcha_image'] = array( |
| 242 | 251 |
'#type' => 'markup', |
| 243 | 252 |
'#markup' => '<img src="' . $img_src |
| 244 |
. '" width="'. $width . '" height="' . $height
|
|
| 245 |
. '" alt="' . t('Image CAPTCHA') . '" title="' . t('Image CAPTCHA') . '" />',
|
|
| 253 |
. '" width="' . $width . '" height="' . $height
|
|
| 254 |
. '" alt="' . t('Image CAPTCHA') . '" title="' . t('Image CAPTCHA') . '" />',
|
|
| 246 | 255 |
'#weight' => -2, |
| 247 | 256 |
); |
| 248 | 257 |
$result['form']['captcha_response'] = array( |
| ... | ... | |
| 259 | 268 |
case CAPTCHA_DEFAULT_VALIDATION_CASE_SENSITIVE: |
| 260 | 269 |
$result['captcha_validate'] = 'captcha_validate_ignore_spaces'; |
| 261 | 270 |
break; |
| 271 |
|
|
| 262 | 272 |
case CAPTCHA_DEFAULT_VALIDATION_CASE_INSENSITIVE: |
| 263 | 273 |
$result['captcha_validate'] = 'captcha_validate_case_insensitive_ignore_spaces'; |
| 264 | 274 |
break; |
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