Integrate Cage in spring to implement CAPTCHA function

Add cage dependency in 1.pom.xml.

    <Dependency>            <groupId>Com.github.cage</groupId>            <Artifactid>Cage</Artifactid>            <version>1.0</version>        </Dependency>    

Project related information: https://akiraly.github.io/cage/quickstart.html.

2.Controller:@RestController

@RestController
@RequestMapping ("Captcha")
public class Captchacontroller {

    @Autowired
    Private Captchaservice Captchaservice;

    @RequestMapping ("Get")
    public void get (HttpServletResponse response,string key) throws IOException {
        Response.setcontenttype ("Image/jpeg");//Set the media type of the response so that the browser will recognize that the image is responding
        Response.getoutputstream (). Write (Captchaservice.getcaptcha (key));
        Response.flushbuffer ();
    }
}

3.Service:

@Service ("Captchaservice") Public classCaptchaservice {Private Static FinalLogger log = Loggerfactory.getlogger (captchaservice.class);    @Autowired Redisdao Redisdao; Cage Cage=NewGcage ();  Public byte[] Getcaptcha (String ID) {if(Stringutils.isblank (id)) {return NULL; } bytearrayoutputstream OS=NewBytearrayoutputstream (); String token= Cage.gettokengenerator (). Next (). SUBSTRING (0, 4); Try{cage.draw (token, OS);        Os.close (); } Catch(IOException e) {e.printstacktrace (); } String Key= "captcha-" +ID;        Redisdao.getjredis (). Opsforvalue (). Set (key, token); Redisdao.getjredis (). Expire (Key,1, timeunit.hours); returnOs.tobytearray (); }     Public BooleanMatchcaptcha (String ID, string captcha) {if(Stringutils.isblank (ID) | |Stringutils.isblank (CAPTCHA)) {            return false; } String Key= "captcha-" +ID; String Rediscaptcha=string.valueof (Redisdao.getjredis (). Opsforvalue (). Get (key)); if(Stringutils.isblank (Rediscaptcha)) {return false; } log.info (ID+ "," + Captcha + "," +Rediscaptcha); returnstringutils.equalsignorecase (CAPTCHA, Rediscaptcha); }}

4. Front Page:

$ (' #yzmimg '). attr (' src ', ' https://localhost:8082/captcha/get?key ' +timestamp);

Summary: Setting

Response.setcontenttype ("Image/jpeg") so the return will be in picture form, here is the pit.

Integrate Cage in spring to implement CAPTCHA function