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annotate mod_register_web/mod_register_web.lua @ 653:c08b0e4b7b38

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mod_register_web: Extremely rough web registration page, with captcha
author Matthew Wild <mwild1@gmail.com>
date Sun, 29 Apr 2012 17:36:31 +0100
parents
children 03595194075a
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c08b0e4b7b38 mod_register_web: Extremely rough web registration page, with captcha
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1 local captcha_options = module:get_option("captcha_options", {});
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2
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3 function generate_captcha(display_options)
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4 return (([[
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5 <script type="text/javascript"
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6 src="http://www.google.com/recaptcha/api/challenge?k=$$recaptcha_public_key$$">
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7 </script>
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8 <noscript>
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9 <iframe src="http://www.google.com/recaptcha/api/noscript?k=$$recaptcha_public_key$$$$recaptcha_display_error$$"
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10 height="300" width="500" frameborder="0"></iframe><br>
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11 <textarea name="recaptcha_challenge_field" rows="3" cols="40">
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12 </textarea>
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13 <input type="hidden" name="recaptcha_response_field"
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14 value="manual_challenge">
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15 </noscript>
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16 ]]):gsub("$$([^$]+)$%$", setmetatable({
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17 recaptcha_display_error = display_options and display_options.recaptcha_error
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18 and ("&error="..display_options.recaptcha_error) or "";
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19 }, {
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20 __index = function (t, k)
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21 if captcha_options[k] then return captcha_options[k]; end
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22 module:log("error", "Missing parameter from captcha_options: %s", k);
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23 end })
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24 ));
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25 end
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26
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27 function generate_page(event, display_options)
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28 local request = event.request;
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29 return [[<!DOCTYPE html>
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30 <html><body>
c08b0e4b7b38 mod_register_web: Extremely rough web registration page, with captcha
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31 <h1>XMPP Account Registration</h1>
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32 <form action="]]..request.path..[[" method="POST">]]
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33 ..("<p>%s</p>\n"):format((display_options or {}).register_error or "")..
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34 [[ <table>
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35 <tr>
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36 <td>Username:</td>
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37 <td><input type="text" name="username">@server</td>
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38 </tr>
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39 <tr>
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40 <td>Password:</td>
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41 <td><input type="password" name="password"></td>
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42 </tr>
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43 <tr>
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44 <td colspan='2'>]]..generate_captcha(display_options)..[[</td>
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45 </tr>
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46 </table>
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47 <input type="submit" value="Register!">
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48 </form>
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49 </body></html>]];
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50 end
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51
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52 function register_user(form)
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53 if usermanager.user_exists(form.username, module.host) then
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54 return nil, "user-exists";
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55 end
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56 return usermanager.create_user(form.username, form.password, module.host);
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57 end
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58
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59 function generate_success(event, form)
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60 return [[<!DOCTYPE html>
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61 <html><body><p>Registration succeeded! Your account is <pre>]]
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62 ..form.username.."@"..module.host..
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63 [[</pre> - happy chatting!</p></body></html>]];
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64 end
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65
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66 function generate_register_response(event, form, ok, err)
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67 local message;
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68 if ok then
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69 return generate_success(event, form);
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70 else
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71 return generate_page(event, { register_error = err });
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72 end
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73 end
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74
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75 function handle_form(event)
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76 local request, response = event.request, event.response;
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77 local form = http.formdecode(request.body);
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78 http.request("http://www.google.com/recaptcha/api/verify", {
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79 body = http.formencode {
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80 privatekey = captcha_options.recaptcha_private_key;
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81 remoteip = request.conn:ip();
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82 challenge = form.recaptcha_challenge_field;
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83 response = form.recaptcha_response_field;
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84 };
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85 }, function (verify_result, code)
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86 local verify_ok, verify_err = verify_result:match("^([^\n]+)\n([^\n]+)");
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87 if verify_ok == "true" then
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88 local register_ok, register_err = register_user(form);
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89 response:send(generate_register_response(event, form, register_ok, register_err));
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90 else
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91 response:send(generate_page(event, { register_error = verify_err }));
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92 end
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93 end);
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94 return true; -- Leave connection open until we respond above
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95 end
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96
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97 module:provides("http", {
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98 route = {
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99 GET = generate_page;
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100 POST = handle_form;
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101 };
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102 });