Example usage for org.apache.wicket.request.resource DynamicImageResource DynamicImageResource

Introduction

In this page you can find the example usage for org.apache.wicket.request.resource DynamicImageResource DynamicImageResource.

Prototype

public DynamicImageResource(String format) 

Source Link

Document

Creates a dynamic resource from for the given locale

Usage

From source file:com.github.cage.cage_e03_wicket.HomePage.java

License:Apache License

public HomePage() {
    super(new CompoundPropertyModel<Token>(new Token()));
    add(new WebMarkupContainer("goodResult") {
        private static final long serialVersionUID = -5279236538017405828L;

        @Override//  w  w w  .  j  ava2s. c  o m
        protected void onConfigure() {
            super.onConfigure();

            final Token token = HomePage.this.getToken();

            setVisible(token.showGoodResult);
            token.showGoodResult = false;
        }
    });
    add(new WebMarkupContainer("badResult") {
        private static final long serialVersionUID = -6479933043124566245L;

        @Override
        protected void onConfigure() {
            super.onConfigure();

            final Token token = HomePage.this.getToken();

            setVisible(token.showBadResult);
            token.showBadResult = false;
        }
    });

    add(new Form<Token>("form") {
        private static final long serialVersionUID = -2783383042739263677L;

        @Override
        protected void onInitialize() {
            super.onInitialize();
            add(new RequiredTextField<String>("captcha") {
                private static final long serialVersionUID = 8416111619173955610L;

                @Override
                protected void onComponentTag(ComponentTag tag) {
                    super.onComponentTag(tag);
                    tag.put("value", "");
                };
            }.add(new StringValidator() {
                private static final long serialVersionUID = 3888825725858419028L;

                @Override
                public void validate(IValidatable<String> validatable) {
                    super.validate(validatable);
                    if (!validatable.isValid())
                        return;

                    final Token token = HomePage.this.getToken();

                    if (token.token == null || !token.token.equals(validatable.getValue())) {
                        LOGGER.error("There was no generated token, or it didn't match the user given one.");
                        validatable.error(decorate(new ValidationError(this), validatable));
                    }
                }
            }));
        }

        @Override
        protected void onSubmit() {
            super.onSubmit();
            onPost(true);
        }

        @Override
        protected void onError() {
            super.onError();
            onPost(false);
        }

        protected void onPost(boolean good) {
            final Token token = HomePage.this.getToken();

            token.showGoodResult = good;
            token.showBadResult = !good;
        }
    });

    add(new Image("captchaImage", new DynamicImageResource(cage.getFormat()) {
        private static final long serialVersionUID = -1475355045487272906L;

        @Override
        protected void configureResponse(ResourceResponse response, Attributes attributes) {
            super.configureResponse(response, attributes);
            final Token token = HomePage.this.getToken();

            LOGGER.info("Token: {}.", token);

            if (token.token == null || token.tokenUsed) {
                LOGGER.error("Requested captcha without token.");
                response.setError(HttpServletResponse.SC_NOT_FOUND, "Captcha not found.");
            }
            token.tokenUsed = true;

            response.disableCaching();
        }

        @Override
        protected byte[] getImageData(Attributes attributes) {
            final Token token = HomePage.this.getToken();

            return cage.draw(token.token);
        }
    }));
}

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