asp captcha

This paper describes the use of CI Framework Verification Code CAPTCHA auxiliary function, and share it for everyone's reference. Specific as follows: Using the Captcha helper function is convenient to generate verification code, but the picture is stored in the folder, not the output stream, the feeling is not perfect, can be used. Description: Generates a 4-bit random number, and the

real picture, and keep the annotation information. For example, you want the texture of your composite image to be the same as the texture of the real picture, and you can't lose the content information (realism) of the composite picture (the numeric letter above the CAPTCHA). So there are two loss that need refiner to optimize: The l_real in the figure above refers to the loss between the refine composite picture (x_i ') and the real picture Y. L_re

PHP generates dynamic captcha GIF images, This is an example of a dynamic CAPTCHA image generated by PHP, and the point is that you can run it! The following first sent: Here are the related classes and functions that PHP needs to generate the dynamic verification code. Getanimation (); }/** *gifencoder class **/classes gifencoder{var $GIF = "gif89a"; /* GIF Header 6 bytes */var $VER = "Gifenc

recently, a friend asked me to help get the Laravel verification code landing, so a little research. (I almost forgot how to use the Laravel) first of all, install laravel do not have to repeat, my version is 5.2.45 (note: laravel5.2.6 above the version of middleware can automatically load), which is very important. after the installation is complete, you need to use composer to load your captcha by adding "Gregwar/

Captcha (fully automatic distinction between computer and human Turing Test-completely Automated public Turing test to tell Computers and humans Apart) is commonly known as the authentication Code, is a public automatic program that distinguishes users from computers and people. In the CAPTCHA test, the computer that serves as the server automatically generates a problem to be answered by the user. This pro

CAPTCHA in session*/function Valicode ($word = ' Randcode ') {Header ("Content-type:image/gif");$border = 0; Whether to border 1 to: 0 do not$how = 4; Verify number of code bits$w = $how *15; Picture width$h = 18; Picture height$fontsize = 10; Font size$alpha = "ABCDEFGHIJKMNPQRSTUVWXYZ"; Verification Code Content 1: Letters$number = "23456789"; Verification Code Content 2: Digital$randcode = ""; Validation code string initializationSrand (Double) mi

PHP development framework YiiFramework tutorial (21) UI component custom Captcha example The Yii built-in Captcha can basically meet most of the requirements. if you have special requirements on the verification code, you can customize Captcha. It is implemented by extending CCaptchaAction. In this example, a verification code function is defined to randomly gene

#!/usr/bin/env python#coding=utf-8import randomimport Image, Imagedraw, Imagefont, imagefilter _letter_cases = " Abcdefghjkmnpqrstuvwxy "# lowercase letters, removing potentially disturbing i,l,o,z_upper_cases = _letter_cases.upper () # uppercase letters _numbers = '. Join (Map (str, Range (3, 10)) # number Init_chars = '. Join ((_letter_cases, _upper_cases, _numbers)) fonttype= "/usr/share/fonts/truetype/ Freefont/freesans.ttf "Def create_validate_code (size=), Chars

well as the font size font=imagefont.truetype ("Kumo.ttf", size=26) for I in range (5): # loop 5 times, get 5 random string ran Dom_char = Getrandomstr () # The random string that was written once on the picture, the parameters are: positioning, string, color, Font draw.text ((10+i*30, 0), Random_char, Getrandomcolor (), Font=font) # Save to Hard disk, named Test.png format png picture image.save (' test.png ', ' WB '), ' PNG ') Effect:5. Generate a picture of the

value of the verification codesession["Bao_code"] = code. ToUpper ();}public class Verifycode{#region Verification Code Length (the length of the default 6 captcha) #region The length of the verification code (the length of the default 6 captcha)int length = 6;public int Length{get {return length;}set {length = value;}}#endregion#region captcha Font Size (defaul

Always wanted to write this, after a long time today interest came to simply record. Verification Code Fully automatic distinguish between computer and human public Turing Test (English: Completely automated publicly Turing test to tell Computers and humans Apart, abbreviated as CAPTCHA), commonly known as CAPTCHA, is a public automatic program that distinguishes users from computers and people. In the

This PHP generated CAPTCHA code principle generates a random number--Create picture--random number in the picture--Save in session, look at the process verification code picture generation notification browser will output PNG picture ready random number generator seed srand (double ) Microtime () *1000000); Drawing a four-bit integer verification code into a picture /php Tutorial Generate CAPTCHA Code/*==

Ecshop has a built-in powerful Verification Code mechanism. We only need to call the cls_captcha.php verification code. Note: When we use a PHP file defined by ourselves, we 'd better add the in_ecs as the ture setting. Otherwise, a hacker attack error may be thrown. The following shows the Ajax request verification code. Define ('in _ ecs', true); require (dirname (_ file __). '/Includes/init. PHP '); include_once (dirname (_ file __). '/shortdes/cls_captcha.php'); $ validator = new

Http://seleniumworks.blogspot.kr/2013/09/handling-captcha-webdriver.htmlMake use of the ' input ' tag with type ' hidden ' in-order to handle Captcha.Example for reference.Driver.get ("Http://www.google.com/recaptcha/learnmore");Driver.switchto (). frame (0); Calling IFRAME with no IDJavascriptexecutor js = (javascriptexecutor) driver;Setting the CAPTCHA valuesJs.executescript ("Document.getelementsbyname"

Recaptcharesponse ();$recaptcha _response->is_valid = false;$recaptcha _response->error = ' Incorrect-captcha-sol ';return $recaptcha _response;}$response = _recaptcha_http_post (Recaptcha_verify_server, "/recaptcha/api/verify",Array (' Privatekey ' = $privkey,' Remoteip ' = $remoteip,' Challenge ' = $challenge,' Response ' = $response) + $extra _params);$answers = explode ("\ n", $response [1]);$recaptcha _response = new Recaptcharesponse ();$pos =

Ubuntu PHP server, captcha picture does not show characters, what's going on Ubuntu PHP server, captcha picture does not display characters, what's going on? There is a picture generated, that is, no character display. Is the character set wrong? Where is the setting? Share to: ------Solution-------------------- References: Quote: References: Code to check it out.

Ubuntu PHP server, captcha picture does not show characters, what's going on Ubuntu PHP server, captcha picture does not display characters, what's going on? There is a picture generated, that is, no character display. Is the character set wrong? Where is the setting? Share to: ------Solution-------------------- References: Quote: References: Code to check it out.

public class Authimg extends HttpServlet {/****/Private static final long serialversionuid = 4975974534946437434L;Set the font and size of the graphics Captcha stringPrivate font mfont = new Font ("Microsoft Jas Black", Font.Italic, 18);Private random random = new random ();public void Init () throws Servletexception {Super.init ();}Service methods for generating server responsespublic void Service (HttpServletRequest request, httpservletresponse resp

,paypal ...) to the share inside. That is: under Share, there is a site folder under each folder that makesPwntchaCan open the verification code picture file for these sites.After these two major steps, you can usePwntchaThe The command is:Usage:./Pwntcha[OPTION] ... IMAGE ...-M,--mode -S,--share -Q,--quiet do not print information messages-H,--help display this help and exit-V,--version output version information and exitDownload Image:curl -O http://hactheplanet.com/blog/wp-content/uploads/201

1 #Verification Code2 #read Verification code URL, open Local path, write, enter verification code3DownPicture =Urllib.request.urlopen (Secretcodeurl). Read ()4Local = open (address,'WB')5 local.write (downpicture)6 local.close ()7 Print(U"please look for your verification code from the desktop")8 Print(U"Please enter the verification code:")9Secretcode =input ()TenDRIVER.FIND_ELEMENT_BY_ID ('Txtsecretcode'). Send_keys (Secretcode)Python saves the captcha