BT: captcha
Hola
Ús envio el patch que afegeix el modul captcha. El mòdul requereix que
hi hagi instal·lat el paquet php4-gd.
Problemes:
- El mòdul crida a una funció de rotació d'imatges, que he comentat ja
que no la troba, s'haurà de comprovar.
- Trobo que les imatges són petites. Si a vosaltres també ho penseu es
pot provar de fer-les més grans.
Adeu
--- modules/captcha/captcha.module 1970-01-01 01:00:00.000000000 +0100
+++ modules/captcha/captcha.module 2004-11-24 11:24:44.000000000 +0100
@@ -0,0 +1,126 @@
+<?php
+// $Id: captcha.module,v 1.2 2004/10/19 08:15:18 arnabdotorg Exp $
+
+function captcha_help($section = "admin/help#captcha") {
+ $output = "";
+
+ switch ($section) {
+ case 'admin/help#captcha':
+ $output .= "<p>Adds a Captcha to the registration form.</p>";
+ $output .= "<p>More help needed here.</p>";
+ break;
+ case 'admin/modules#description':
+ $output = t("Adds a Captcha to the registration form.");
+ break;
+ case 'admin/modules/captcha':
+ $output = t("Adds a Captcha to the registration form.");
+ break;
+ case 'admin/captcha':
+ $output = t("Adds a Captcha to the registration form.");
+ break;
+ }
+ return $output;
+}
+
+function captcha_cron() {
+
+ //Clean up old images
+ foreach (glob(variable_get("captcha_image_path", "")."/captcha*.png") as $filename) {
+ unlink($filename);
+ }
+
+}
+
+function captcha_settings() {
+
+ $output .= form_textfield(t('Image Path'), 'captcha_image_path', variable_get("captcha_image_path", ""), 30, 255, 'Path where to store the images.');
+
+ return $output;
+}
+
+function captcha_user($type, &$edit, &$user, $category = NULL) {
+
+ // What type of registration action are we taking?
+ //make sure this is a registration
+ if (!$user->uid)
+ switch ($type) {
+ case t("register"):
+ // Add two items to the resigtration form.
+
+ //create captcha
+ $consts='bcdgjxvmnprst';
+ $vowels='aeiou';
+
+ for ($x=0; $x < 6; $x++) {
+ mt_srand ((double) microtime() * 1000000);
+ $const[$x] = substr($consts,mt_rand(0,strlen($consts)-1),1);
+ $vow[$x] = substr($vowels,mt_rand(0,strlen($vowels)-1),1);
+ }
+ $string = $const[0] . $vow[0] .$const[2] . $const[1] . $vow[1] . $const[3] . $vow[3] . $const[4];
+ $string = substr($string,0,rand(5,8));
+
+ //write to session
+ sess_write('captcha',$string);
+
+ $filename = variable_get("captcha_image_path", "")."/captcha".md5(session_id()).".png";
+
+ /* set up image, the first number is the width and the second is the height*/
+ $im = imagecreatetruecolor(120, 20);
+
+ /*creates two variables to store color*/
+ $background = imagecolorallocate($im, rand(180, 250), rand(180, 250), rand(180, 250));
+ $foreground = imagecolorallocate($im, rand(0, 80), rand(0, 80), rand(0, 80));
+ $middleground = imagecolorallocate($im, rand(200, 160), rand(200, 160), rand(200, 160));
+
+ /*fill image with bgcolor*/
+ imagefill($im, 0, 0, $background);
+
+ /*writes string */
+ imagestring($im, 5, 10, 0, $string, $foreground);
+
+ //strikethrough
+ imageline($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0, 120), $foreground);
+
+ //rotate
+//carles: no se perque no va
+// $im2 = imagerotate($im,rand(-20,45),$background);
+// imagedestroy($im);
+// $im = $im2;
+
+ $middleground = imagecolorallocatealpha($im, rand(160, 200), rand(160, 200), rand(160, 200), 80);
+ //random shapes
+ for ($x=0; $x<50;$x++) {
+ imageline($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0, 120), $middleground);
+ imageellipse($im, rand(0, 120), rand(0, 120), rand(0, 120), rand(0, 120), $middleground);
+ }
+
+ /* output to browser*/
+ imagepng($im, $filename);
+ ImageDestroy($im);
+
+ $output .= form_item("",
+ "<img src=\"$filename\" alt=\"Captcha Image: you will need to recognize the text in it.\"/>");
+
+ $output .= form_textfield(t('Word'), 'captchaword', NULL, 15, 15, 'Please type in the letters/numbers that are shown in the image above.', NULL, TRUE);
+
+ return array(array('title' => t('Verify Registration'), 'data'=>$output));
+
+ //form_group(t('Account information'), "fdsf", "")
+
+ break;
+ case t("validate"):
+ // The user has filled out the form and checked the "accept" box.
+ if ($edit['captchaword'] == sess_read('captcha')) {
+ // on success return the values you want to store
+ return array("captcha_correct" => 1);
+ }
+ else {
+ // on error return an error message
+ form_set_error('captchaword', t("Please re-recognize the word shown in the image."));
+ return $edit;
+ }
+ break;
+ }
+}
+
+?>
--- modules/captcha/LICENSE.txt 1970-01-01 01:00:00.000000000 +0100
+++ modules/captcha/LICENSE.txt 2004-11-04 10:01:06.000000000 +0100
@@ -0,0 +1,340 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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--- modules/captcha/README.txt 1970-01-01 01:00:00.000000000 +0100
+++ modules/captcha/README.txt 2004-10-19 10:15:18.000000000 +0200
@@ -0,0 +1,17 @@
+Captcha Readme
+
+Notes
+- Uses GD to draw stuff, emits in PNG
+- Uses the _cron hook to clean up old image files - make sure you have the
+ drupal cron setup, or you'll have to manually reclaim diskspace.
+
+Captcha Todo - arnabdotorg
+- have to check for GD.
+- clean up image generation code.
+- add more customizability, like image dirs, etc.
+- add TTF font capability.
+- make captcha distortion more spiffy.
+
+Captcha Screenshot
+
+http://lab.arnab.org/drupal/captcha/screenshot.png
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