asp captcha

Downloads for Captcha.jar:HTTP://PAN.BAIDU.COM/S/1WAXBG Extraction Code: h216deployment of Captcha: The captcha jar is introduced into the project; configuring in Web. XML detailed configuration of the Web. xml file: Example: Front: for validation: check.jsp Promotion: In this blog view: Algorithm verification code, Chinese ve

Http://htsoft.org/html/y2011/822_using-htmlunit-landing-site-with-captcha-image.htmlUse Htmlunit to log in a website with captcha imagesSeptember 15, 2011 ⁄ programming language ⁄ a total of 1266 characters ⁄ font size small big ⁄ no comments ⁄ read 7,088 times Take Baidu Statistics as an example, explain how to use Htmlunit login with verification code of the websiteBaidu Statistics Login Code try{webcli

public class Checkcode extends HttpServlet {private static final long serialversionuid = 1l;private int width = 80;//Verification Code The width private int height = 20 of the picture; The high private int codecount = 4 of the captcha picture; Number of characters in the captcha picture private int x = 16;private int fontheight = 16;private int codey = 18;private final char[] codesequence = {' A ' ', ' B ',

string ss = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";Random a = new random ();int b;String yan = "";for (int i = 0; i {b = A.next (62);Yan + = ss. Substring (b, 1);}Console.WriteLine ("Verification Code is:" + yan);Console.Write ("Please enter the Verification Code:");String c = Console.ReadLine ();if (c.toupper () = = Yan. ToUpper ()){Console.WriteLine ("The Verification code is correct! ");}Else{Console.WriteLine ("Captcha Er

PHP Verification Code implementation codes (3 kinds), PHP captcha Code of 3 Verification code in the form implementation more and more, but with JS write verification code, always feel inconvenient, so learned the next PHP implementation of the verification code. Well, there is nothing to do, but do not want to waste time, so learned the next PHP implementation verification code. It is the so-called, multi-technology does not pressure body. Also, it

Want to save the captcha image on someone else's website, or display the same captcha image on my website. As a result, the verification code on his website is What the hell is this? How to save this verification code locally, or refer to this image. If you refer to this a.php directly. The generated verification code is different .... Ask the great God for power. or ideas. Thank you. Reply to discussi

Refreshing the browser is normal. How to solve, what code can force the verification code re-loaded. Reply to discussion (solution) Add a js random parameter after the generated address, url?r=math.random () "> You add a non-cached header to the CAPTCHA picture generator Header ("Expires:mon, Jul 1997 05:00:00 GMT"); Date in the Pastheader ("Last-modified:". Gmdate ("D, D M Y h:i:s"). "GMT"); Header ("Cache-control:no-cache, must-revalid

The problem with my PHP captcha is this: Image corrupt or Truncated:http://localhost/htsys/?c=loginm=yzm No matter how I debug always can not display the captcha picture, prompting the image for its own reasons can not be displayed ... Tangled Up Reply to discussion (solution) Try 1. Image path problem, change the absolute path, or a static diagram on the same path, and exclude if it can be displayed

(200,255), Mt_rand (200,255));Imagechar ($im, 1, $x, $y, "*", $color);}Write a captcha to a patternfor ($i = 0; $i $x = + $i * ($w-15)/4;$y = Mt_rand (3, $h/3);$color = Imagecolorallocate ($im, Mt_rand (0,225), Mt_rand (0,150), Mt_rand (0,225));Imagechar ($im, 5, $x, $y, $str [$i], $color);}Header ("Content-type:image/jpeg"); Output in JPEG format, note that it is not possible to print any characters above, otherwise an errorImagejpeg ($im);Imagedest

Note that spring MVC is implemented through annotation. If you want to know how to use spring annotation, go somewhere else, or I will write a new article later! Prerequisites: the jar package kaptcha-2.3.2.jar is required as follows: Http://code.google.com/p/kaptcha/downloads/list 1. Servlet implementation method 1.1web.xml is as follows: 1.2 The JSP code is as follows: II. Implementation of spring MVC 2.1 spring configuration file 2.2 controller implementation Package COM. vopzoon. ap

with Imagecreate (). $green = imagecolorallocate ($image, 0, 255, 0); Step Two: Assign color imageline to the image ($image, 0, +,-A, $green); The third step: Draw line Imagerectangle ($image, 100,40,300,100, $green); Draw Rectangle Imagearc ($image, max, 0, N, $green); Draw round imagestring ($image, +, +, "PHP is Niubi honghong!", $green); Write String $str= "abcdefghjklmnpqrstuvwxyz23456789"; $randstr = substr (Str_shuffle ($STR), 0,4); Imagestring ($image, 14, 100 , 260, $RANDSTR, $green)

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 method for generating server responsepublic void Service (HttpServletRequest request, httpservletresponse respon

maven reference ${jfinal-captcha.version} replaced with the corresponding version such as: 0.1 /** * Get the Verification code */@ResponseBody @RequestMapping (value = "Captcha", produces = arr Ayof ("Image/png")) Fun Getcaptcha (@RequestParam ("token") token:string): ByteArray {val outimg = bytearrayou Tputstream () Val captcha = Captchaservice.getcaptcha () Val image = Captcha.image val Captchacode =

"; $CURLJ = Curl_init (); $timeout = 5; curl_setopt ($curl, Curlopt_url, $login _url); curl_setopt ($curl, Curlopt_returntransfer, 1); curl_setopt ($curl, Curlopt_connecttimeout, $timeout); curl_setopt ($curl, Curlopt_cookiejar, $cookie _file); Gets the cookie and stores the $contents = Curl_exec ($curl); Curl_close ($curl); echo "Cookie fetch complete, fetching captcha ... \ n"; Remove the verification code $curl = Curl_init (); curl_setopt ($curl,

Copy CodeThe code is as follows: function Make_rand ($length = "32") {//Captcha text generation functions $str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"; $result = ""; for ($i =0; $i $num [$i]=rand (0,61); $result. = $str [$num [$i]]; } return $result; } $checkcode = Make_rand (5); $im _x=160; $im _y=32; function Make_crand ($length = "5") { $string = "; for ($i =0; $i $string. = Chr (rand (0XB0,0XF7)). Chr (rand (0XA1,0XFE))

PHP generated Verification code file is a learning PHP friends should know the technology oh, this can not only make your site security to improve some, you can also note some machine registration and other problems Oh, below we will look at a simple generation code program PHP generated Verification code file is a learning PHP friends should know the technology oh, this can not only make your site security to improve some, you can also note some machine registration and other problems Oh, below