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Posted to cvs@cocoon.apache.org by pi...@apache.org on 2005/09/05 02:14:29 UTC
svn commit: r278648 - in /cocoon/branches/BRANCH_2_1_X/src/blocks/captcha:
./ conf/ java/ java/org/ java/org/apache/ java/org/apache/cocoon/
java/org/apache/cocoon/reading/ samples/
Author: pier
Date: Sun Sep 4 17:14:22 2005
New Revision: 278648
URL: http://svn.apache.org/viewcvs?rev=278648&view=rev
Log:
Adding the "CAPTCHA" block as promised
Added:
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha-reader.xmap
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha.xsamples
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/org/
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/org/apache/
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/org/apache/cocoon/
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/org/apache/cocoon/reading/
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/org/apache/cocoon/reading/CaptchaReader.java
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/captcha.js
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/custom.xhtml
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-failure.jx
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-success.jx
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple.jx
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/sitemap.xmap
cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/welcome.xml
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha-reader.xmap
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha-reader.xmap?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha-reader.xmap (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha-reader.xmap Sun Sep 4 17:14:22 2005
@@ -0,0 +1,25 @@
+<?xml version="1.0"?>
+<!--
+ Copyright 1999-2004 The Apache Software Foundation
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<xmap xmlns:map="http://apache.org/cocoon/sitemap/1.0"
+ xpath="/sitemap/components/readers"
+ unless="reader[@name='captcha']">
+
+ <map:reader name="captcha"
+ logger="sitemap.reader.captcha"
+ src="org.apache.cocoon.reading.CaptchaReader"/>
+</xmap>
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha.xsamples
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha.xsamples?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha.xsamples (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/conf/captcha.xsamples Sun Sep 4 17:14:22 2005
@@ -0,0 +1,26 @@
+<?xml version="1.0"?>
+<!--
+ Copyright 1999-2004 The Apache Software Foundation
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<xsamples xpath="/samples" unless="group[@name='CAPTCHA']">
+
+ <group name="CAPTCHA">
+ <sample name="CAPTCHA Block" href="captcha/">
+ Example usages of CAPTCHAs.
+ </sample>
+ </group>
+
+</xsamples>
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/org/apache/cocoon/reading/CaptchaReader.java
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/org/apache/cocoon/reading/CaptchaReader.java?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/org/apache/cocoon/reading/CaptchaReader.java (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/java/org/apache/cocoon/reading/CaptchaReader.java Sun Sep 4 17:14:22 2005
@@ -0,0 +1,310 @@
+/*
+ * Copyright 1999-2004 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.cocoon.reading;
+
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics2D;
+import java.awt.Image;
+import java.awt.RenderingHints;
+import java.awt.geom.Rectangle2D;
+import java.awt.image.BufferedImage;
+import java.awt.image.WritableRaster;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.lang.reflect.Field;
+import java.util.Random;
+
+import com.sun.image.codec.jpeg.JPEGCodec;
+import com.sun.image.codec.jpeg.JPEGEncodeParam;
+import com.sun.image.codec.jpeg.JPEGImageEncoder;
+
+/**
+ * <p>The {@link CaptchaReader} is a simple tool generating JPEG images for the text
+ * supplied as its source in a way so that it's hard to parse automatically.</p>
+ *
+ * <p><i>CAPTCHA</i> means quite literally <i>Completely Automated Public Turing
+ * Test to Tell Computers and Humans Apart</i> and one of the best resources on
+ * this can be found at the <a href="http://www.captcha.net/">Carnegie Mellon
+ * School of Computer Science CAPTCHA project.</a>.
+ *
+ * <p>This reader creates very simple <i>CAPTCHAs</i> from within a Cocoon pipeline,
+ * enabling quick and safe end-user presence identificat. As an example, look at the
+ * following pipeline snippet:</p>
+ *
+ * <pre>
+ * <map:match pattern="*">
+ * <map:read type="captcha" src="{1}"/>
+ * </map:match>
+ * </pre>
+ *
+ * <p>The example will produce an image containing the text in <code>{1}</code>
+ * "warped" or "bent" in a way similar to the Adobe® Photoshop® "Wave"
+ * filter plugin.</p>
+ *
+ * <p>Few pipeline parameters control the operation of the {@link CaptchaReader}
+ * (this component is not configurable):</p>
+ *
+ * <ul>
+ * <li><code>width</code>: the width of the image to generate (default: 100).</li>
+ * <li><code>height</code>: the height of the image to generate (default: 50).</li>
+ * <li><code>foreground</code>: the text foreground color (default: random).</li>
+ * <li><code>background</code>: the image background color (default: white).</li>
+ * <li><code>font</code>: the font to use for the text (default: serif).</li>
+ * <li><code>scale</code>: the scaling factor for interim images (default: 5).</li>
+ * <li><code>amount</code>: the amount of text warping to apply (default: 1).</li>
+ * <li><code>quality</code>: the JPEG encoding quality (default: 0.75).</li>
+ * </ul>
+ *
+ * <p>Note that when the <code>foreground</code> parameter is not specified, the
+ * color used to write the text will be randomly chosen in a way that it contrasts
+ * well with the background color to avoid problems of illegible text.</p>
+ *
+ * <p>Both the <code>foreground</code> and <code>background</code> parameters accept
+ * strings in the format specified by {@link Color#decode(String)} (for example
+ * <code>fff</code>, or <code>0099CC</code>) or one of the field names of the
+ * {@link Color} class (for example {@link Color#BLACK BLACK} or {@link Color#cyan
+ * cyan} ...).</p>
+ *
+ * <p>The <code>scale</code> parameter controls how much the specified size should
+ * be scaled while processing the interim images: the bigger the scaling factor, the
+ * better the image quality, but also the memory used while generating the final
+ * image will be bigger. In other words, use with care.</p>
+ *
+ * <p>The <code>amount</code> parameter is interpreted as a floating point number
+ * and must be greater than zero. This controls how much text should be warped, and
+ * normally a value of <code>1</code> produce quite-good warping. Increasing (or
+ * decreasing) this value will produce more (ore less) warping.</p>
+ *
+ * <p>Remember that in no way the {@link CaptchaReader} claims to be able to
+ * generate "unbreakable" text (that will be impossible), and improvements to the
+ * algorithm are welcome.</p>
+ *
+ * @author <a href="mailto:pier@betaversion.org">Pier Fumagalli</a>
+ */
+public class CaptchaReader extends AbstractReader {
+
+ /** <p>A unique {@link Random} instance to use.</p> */
+ private static final Random RANDOM = new Random();
+
+ /**
+ * <p>The content type of the generated content: <code>image/jpeg</code>.</p>
+ *
+ * @return Always <code>image/jpeg</code>.
+ */
+ public String getMimeType() {
+ return "image/jpeg";
+ }
+
+ /**
+ * <p>Return a {@link Color} instance from a specified parameter.</p>
+ *
+ * @param parameterName The name of the parameter whose to use as the color.
+ * @param defaultColor The default {@link Color} to return.
+ * @return the interpreted color or the default color specified.
+ */
+ private Color getColor(String parameterName, Color defaultColor) {
+ String colorString = this.parameters.getParameter(parameterName, null);
+ if (colorString == null) return defaultColor;
+ try {
+ return Color.decode(colorString);
+ } catch (Exception e1) {
+ try {
+ Field colorField = Color.class.getDeclaredField(colorString);
+ return (Color) colorField.get(Color.class);
+ } catch (Exception e2) {
+ return defaultColor;
+ }
+ }
+ }
+
+ private Graphics2D antialiasedGraphics(BufferedImage image) {
+ Graphics2D graphics = image.createGraphics();
+ graphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
+ RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+ return graphics;
+ }
+
+ /**
+ * <p>Create an image containing the text specified as this reader source
+ * warped to avoid automatic interpretation.</p>
+ *
+ * @throws IOException if an I/O error occurred generating the image.
+ */
+ public void generate()
+ throws IOException {
+
+ /* Retrieve the current operational parameters from Cocoon's sitemap */
+ final int width = this.parameters.getParameterAsInteger("width", 100);
+ final int height = this.parameters.getParameterAsInteger("height", 50);
+ Color background = this.getColor("background", Color.WHITE);
+ Color foreground = this.getColor("foreground", null);
+ if (foreground == null) {
+ int r = (RANDOM.nextInt(64) + 96 + background.getRed()) & 0x0ff;
+ int g = (RANDOM.nextInt(64) + 96 + background.getGreen()) & 0x0ff;
+ int b = (RANDOM.nextInt(64) + 96 + background.getBlue()) & 0x0ff;
+ foreground = new Color(r, g, b);
+ }
+ final String fontName = this.parameters.getParameter("font", "serif");
+ final int scale = this.parameters.getParameterAsInteger("scale", 5);
+ final float amount = this.parameters.getParameterAsFloat("amount", 2);
+ final float quality = this.parameters.getParameterAsFloat("quality", 0.75F);
+ final String text = this.source;
+
+ /* Create the final buffered image we will be writing to at the bottom */
+ final BufferedImage result = new BufferedImage(width, height,
+ BufferedImage.TYPE_INT_RGB);
+
+ /* Starting with a size of 100, evaluate how big the real font should be */
+ final Font baseFont = new Font(fontName, Font.PLAIN, 100);
+ final Graphics2D graphics = this.antialiasedGraphics(result);
+ final FontMetrics metrics = graphics.getFontMetrics(baseFont);
+ final Rectangle2D tempSize = metrics.getStringBounds(text, graphics);
+
+ /* Evaluate the image size of the resulting image and prepare a ratio */
+ final double tempWidth = tempSize.getWidth() + (2 * tempSize.getHeight());
+ final double tempHeight = (tempSize.getHeight() * (1 + amount));
+ final double ratioWidth = width * scale / tempWidth;
+ final double ratioHeight = height * scale / tempHeight;
+ final double ratio = ratioWidth < ratioHeight? ratioWidth: ratioHeight;
+ final Font font = baseFont.deriveFont((float) (100 * ratio));
+
+ /* Evaluate the final size of the text to write */
+ final FontMetrics sourceMetrics = graphics.getFontMetrics(font);
+ final Rectangle2D size = sourceMetrics.getStringBounds(text, graphics);
+ final double textWidth = size.getWidth();
+ final double textHeight = size.getHeight();
+
+ /* Evaluate the final size of the interim images */
+ int scaledWidth = (int) (tempWidth * ratio);
+ int scaledHeight = (int) (tempHeight * ratio);
+
+ /* Create a couple of images to write the plain string and the warped one */
+ BufferedImage source = new BufferedImage(scaledWidth, scaledHeight,
+ BufferedImage.TYPE_BYTE_GRAY);
+ BufferedImage warped = new BufferedImage(scaledWidth, scaledHeight,
+ BufferedImage.TYPE_INT_ARGB);
+
+ /* Prepare the background and the font of the source image */
+ final Graphics2D sourceGraphics = this.antialiasedGraphics(source);
+ sourceGraphics.setColor(Color.BLACK);
+ sourceGraphics.fillRect(0, 0, scaledWidth, scaledHeight);
+ sourceGraphics.setFont(font);
+
+ /* Write the string exactly in the middle of the source image */
+ float textX = (float) ((scaledWidth - textWidth) / 2);
+ float textY = (float) ((scaledHeight - textHeight) / 2);
+ sourceGraphics.setColor(Color.WHITE);
+ sourceGraphics.drawString(text, textX, textY + sourceMetrics.getAscent());
+
+ /* Randomize displacement factors for sine-waves */
+ final int displaceTop = RANDOM.nextInt(scaledWidth);
+ final int displaceBtm = RANDOM.nextInt(scaledWidth);
+ final int displaceVer = RANDOM.nextInt(scaledHeight);
+
+ /* Calculate the horizontal and vertical amplitude and wavelength of sines */
+ final double amplitHor = textHeight * amount / 4;
+ final double amplitVer = textHeight / 8;
+ final double t = (RANDOM.nextDouble() * textWidth / 2) + (textWidth * 0.75);
+ final double b = (RANDOM.nextDouble() * textWidth / 2) + (textWidth * 0.75);
+ final double wlenTop = textHeight > t? textHeight: t;
+ final double wlenBtm = textHeight > b? textHeight: b;
+
+ /* Calculate the offsets for horizontal (top and bottom) sine waves */
+ final double offsetTop = amplitHor;
+ final double offsetBtm = scaledHeight - amplitHor;
+
+ /* Prepare an array for vertical displacement sine wave */
+ final double vert[] = new double[scaledHeight];
+ for (int v = 0; v < scaledHeight ; v++) {
+ vert[v] = Math.sin((Math.PI * (v + displaceVer)) / textHeight) * amplitVer;
+ }
+
+ /* Iterate all the target image pixels and render the distortion */
+ int x1 = Integer.MAX_VALUE;
+ int x2 = Integer.MIN_VALUE;
+ int y1 = Integer.MAX_VALUE;
+ int y2 = Integer.MIN_VALUE;
+ final WritableRaster sourceRaster = source.getRaster();
+ final WritableRaster warpedRaster = warped.getRaster();
+ final double src[] = new double[9];
+ final double col[] = new double[] { foreground.getRed(),
+ foreground.getGreen(),
+ foreground.getBlue(), 0};
+ for (int h = 0; h < scaledWidth; h++) {
+ final double baseTop = (Math.PI * (h + displaceTop)) / wlenTop;
+ final double baseBtm = (Math.PI * (h + displaceBtm)) / wlenBtm;
+ final double top = offsetTop + Math.sin(baseTop) * amplitHor;
+ final double btm = offsetBtm - Math.sin(baseBtm) * amplitHor;
+
+ for (int v = 0; v < scaledHeight; v ++) {
+ final double x = (h + vert[v]);
+ final double y = (v * ((btm - top) / scaledHeight)) + top;
+
+ if ((y > 0) && (y < scaledHeight - 1) &&
+ (x > 0) && (x < scaledWidth - 1)) {
+
+ /* Retrieve the nine pixels around the source one */
+ sourceRaster.getPixels((int)(x-1), (int)(y-1), 3, 3, src);
+
+ /* Average their value (it's grayscale) to have a better warp */
+ double alpha = ((src[1] + src[3] + src[5] + src[7]) * 0.1) +
+ ((src[0] + src[2] + src[6] + src[8]) * 0.025) +
+ (src[4] * 0.5);
+
+ /* Write the resultin pixel in the target image if necessary */
+ if (alpha > 0) {
+ col[3] = alpha;
+ warpedRaster.setPixel(h, v, col);
+ if (h < x1) x1 = h;
+ if (h > x2) x2 = h;
+ if (v < y1) y1 = v;
+ if (v > y2) y2 = v;
+ }
+ }
+ }
+ }
+
+ /* Crop the image to the maximum extent of the warped text (if visible) */
+ source = null;
+ int xd = x2 - x1 + 1;
+ int yd = y2 - y1 + 1;
+ if ((xd > 1) && (yd > 1)) {
+ warped = warped.getSubimage(x1, y1, xd, yd);
+ }
+
+ /* Rescale the cropped image to the required size */
+ Image image = warped.getScaledInstance(width, height, Image.SCALE_SMOOTH);
+ graphics.setBackground(background);
+ graphics.setColor(background);
+ graphics.fillRect(0, 0, width, height);
+ graphics.setColor(foreground);
+ graphics.drawImage(image, 0, 0, null);
+ warped = null;
+
+ /* Write the processed image as a JPEG image */
+ ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+ JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(buffer);
+ JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(result);
+ param.setQuality(quality, true);
+ encoder.encode(result, param);
+ buffer.flush();
+ buffer.close();
+ this.out.write(buffer.toByteArray());
+ this.out.flush();
+ }
+}
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/captcha.js
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/captcha.js?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/captcha.js (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/captcha.js Sun Sep 4 17:14:22 2005
@@ -0,0 +1,35 @@
+function passcode(length) {
+ var alphabet = [ 'a', 'a', 'a', 'b', 'c', 'd', 'e', 'e', 'e', 'f', 'g', 'h', 'i',
+ 'i', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'o', 'o', 'p', 'q', 'r',
+ 's', 't', 'u', 'u', 'u', 'v', 'w', 'x', 'y', 'z' ];
+
+ var result = "";
+ for (var x = 0; x < length; x++) {
+ var offset = Math.random() * alphabet.length;
+ result += alphabet[Math.floor(offset)];
+ }
+ return result;
+}
+
+function simple() {
+ var session = cocoon.session;
+
+ session.setAttribute("captcha", passcode(7));
+ cocoon.sendPageAndWait("simple.jx");
+ var parameters = null;
+
+ while (true) {
+ parameters = {
+ "supplied": cocoon.request["captcha"],
+ "expected": session.getAttribute("captcha"),
+ };
+
+ if (parameters['supplied'].equals(parameters['expected'])) break;
+
+ session.setAttribute("captcha", passcode(7));
+ cocoon.sendPageAndWait("simple-failure.jx", parameters);
+ }
+
+ session.invalidate();
+ cocoon.sendPageAndWait("simple-success.jx", parameters);
+}
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/custom.xhtml
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/custom.xhtml?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/custom.xhtml (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/custom.xhtml Sun Sep 4 17:14:22 2005
@@ -0,0 +1,53 @@
+<html>
+ <head>
+ <title>Customize your CAPTCHAs</title>
+ <script language="javascript">//<!--
+ function generate(form) {
+ var imageuri = "custom.jpeg";
+ imageuri += "?text=" + form['text'].value;
+ imageuri += "&width=" + form['width'].value;
+ imageuri += "&height=" + form['height'].value;
+ imageuri += "&background=" + form['background'].value;
+ imageuri += "&foreground=" + form['foreground'].value;
+ imageuri += "&font=" + form['font'].value;
+ imageuri += "&scale=" + form['scale'].value;
+ imageuri += "&amount=" + form['amount'].value;
+ imageuri += "&quality=" + form['quality'].value;
+ imageuri += "&random=" + Math.random();
+ if (document.all) {
+ document.all['captcha'].src = imageuri;
+ } else {
+ document.getElementById('captcha').src = imageuri;
+ }
+ return(false);
+ }
+ //--></script>
+ </head>
+ <body onload="generate(document.forms['form']);">
+ <div style="text-align: center">
+ <p><a href="welcome">Back to the samples</a></p>
+
+ <p>
+ This page demonstrate the capabilities of
+ Cocoon's <code>CaptchaReader</code>.
+ </p>
+
+ <form id="form" onsubmit="return generate(this);">
+ <table border="0" align="center" cellspacing="0" cellpadding="0">
+ <tr><td><input type="text" name="text" value="welcome"/></td><td>The text to render</td></tr>
+ <tr><td><input type="text" name="width" value="100"/></td> <td>The width of the image.</td></tr>
+ <tr><td><input type="text" name="height" value="50"/></td> <td>The height of the image.</td></tr>
+ <tr><td><input type="text" name="background" value="white"/></td> <td>The background color of the image.</td></tr>
+ <tr><td><input type="text" name="foreground" value="black"/></td> <td>The foreground color of the image.</td></tr>
+ <tr><td><input type="text" name="font" value="serif"/></td> <td>The font used to write the text.</td></tr>
+ <tr><td><input type="text" name="scale" value="5"/></td> <td>The scaling factor for rendering quality.</td></tr>
+ <tr><td><input type="text" name="amount" value="1"/></td> <td>The amount of text warping.</td></tr>
+ <tr><td><input type="text" name="quality" value="0.75"/></td> <td>The quality of the JPEG to produce.</td></tr>
+ </table>
+ <input type="submit" value="Generate"/>
+ </form>
+
+ <img id="captcha"/>
+ </div>
+ </body>
+</html>
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-failure.jx
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-failure.jx?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-failure.jx (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-failure.jx Sun Sep 4 17:14:22 2005
@@ -0,0 +1,23 @@
+<html>
+ <head>
+ <title>Simple use of CAPTCHAs</title>
+ </head>
+ <body>
+ <div style="text-align: center">
+ <p><a href="welcome">Back to the samples</a></p>
+
+ <p>
+ Sorry, the value you entered "<code>${supplied}</code>" did not match the
+ expected captcha string "<code>${expected}</code>". Try again...
+ </p>
+
+ <form action="continue" method="post">
+ <img src="simple.jpeg" width="100" height="50"/><br />
+ Enter the text written in the image above and click on <b>Verify</b>.<br />
+ <input type="hidden" name="continuation" value="${continuation.id}"/>
+ <input type="text" name="captcha"/>
+ <input type="submit" value="Verify"/>
+ </form>
+ </div>
+ </body>
+</html>
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-success.jx
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-success.jx?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-success.jx (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple-success.jx Sun Sep 4 17:14:22 2005
@@ -0,0 +1,17 @@
+<html>
+ <head>
+ <title>Simple use of CAPTCHAs</title>
+ </head>
+ <body>
+ <div style="text-align: center">
+ <p><a href="welcome">Back to the samples</a></p>
+
+ <p>
+ Success, the value you entered "<code>${supplied}</code>" matches the
+ expected captcha string "<code>${expected}</code>".
+ </p>
+
+ <p><a href="welcome">Back to the samples</a></p>
+ </div>
+ </body>
+</html>
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple.jx
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple.jx?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple.jx (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/simple.jx Sun Sep 4 17:14:22 2005
@@ -0,0 +1,23 @@
+<html>
+ <head>
+ <title>Simple use of CAPTCHAs</title>
+ </head>
+ <body>
+ <div style="text-align: center">
+ <p><a href="welcome">Back to the samples</a></p>
+
+ <p>
+ This page demonstrate the use of a simple CAPTCHA, implemented using
+ Cocoon's <code>CaptchaReader</code> through server-side sessions.
+ </p>
+
+ <form action="continue" method="post">
+ <img src="simple.jpeg" width="100" height="50"/><br />
+ Enter the text written in the image above and click on <b>Verify</b>.<br />
+ <input type="hidden" name="continuation" value="${continuation.id}"/>
+ <input type="text" name="captcha"/>
+ <input type="submit" value="Verify"/>
+ </form>
+ </div>
+ </body>
+</html>
\ No newline at end of file
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/sitemap.xmap
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/sitemap.xmap?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/sitemap.xmap (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/sitemap.xmap Sun Sep 4 17:14:22 2005
@@ -0,0 +1,83 @@
+<?xml version="1.0"?>
+<!--
+ Copyright 1999-2004 The Apache Software Foundation
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<!--+
+ | HTML block samples sitemap
+ | CVS $Id: sitemap.xmap 230598 2005-08-06 21:53:09Z antonio $
+ +-->
+
+<map:sitemap xmlns:map="http://apache.org/cocoon/sitemap/1.0">
+
+ <map:flow language="javascript">
+ <map:script src="captcha.js"/>
+ </map:flow>
+
+ <map:pipelines>
+ <map:pipeline type="caching">
+
+ <map:match pattern="">
+ <map:redirect-to uri="welcome"/>
+ </map:match>
+
+ <!-- list of samples -->
+ <map:match pattern="welcome">
+ <map:generate src="welcome.xml"/>
+ <map:transform src="context://samples/common/style/xsl/html/simple-samples2html.xsl">
+ <map:parameter name="contextPath" value="{request:contextPath}"/>
+ </map:transform>
+ <map:serialize/>
+ </map:match>
+
+ <map:match pattern="custom">
+ <map:generate src="custom.xhtml"/>
+ <map:serialize type="html"/>
+ </map:match>
+
+ <map:match pattern="simple">
+ <map:call function="simple"/>
+ </map:match>
+
+ <map:match pattern="continue">
+ <map:call continuation="{request-param:continuation}"/>
+ </map:match>
+
+ <map:match pattern="custom.jpeg">
+ <map:read type="captcha" src="{request-param:text}">
+ <map:parameter name="width" value="{request-param:width}"/>
+ <map:parameter name="height" value="{request-param:height}"/>
+ <map:parameter name="background" value="{request-param:background}"/>
+ <map:parameter name="foreground" value="{request-param:foreground}"/>
+ <map:parameter name="font" value="{request-param:font}"/>
+ <map:parameter name="scale" value="{request-param:scale}"/>
+ <map:parameter name="amount" value="{request-param:amount}"/>
+ <map:parameter name="quality" value="{request-param:quality}"/>
+ </map:read>
+ </map:match>
+
+ <map:match pattern="simple.jpeg">
+ <map:read type="captcha" src="{session-attr:captcha}"/>
+ </map:match>
+
+ <map:match pattern="**.jx">
+ <map:generate type="jx" src="{1}.jx"/>
+ <map:serialize type="html"/>
+ </map:match>
+
+
+ </map:pipeline>
+ </map:pipelines>
+</map:sitemap>
Added: cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/welcome.xml
URL: http://svn.apache.org/viewcvs/cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/welcome.xml?rev=278648&view=auto
==============================================================================
--- cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/welcome.xml (added)
+++ cocoon/branches/BRANCH_2_1_X/src/blocks/captcha/samples/welcome.xml Sun Sep 4 17:14:22 2005
@@ -0,0 +1,48 @@
+<?xml version="1.0"?>
+<!--
+ Copyright 1999-2004 The Apache Software Foundation
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<!-- CVS $Id: samples.xml 230598 2005-08-06 21:53:09Z antonio $ -->
+
+<samples name="Captcha Block Samples" xmlns:xlink="http://www.w3.org/1999/xlink">
+
+ <group name="Back">
+ <sample name="Back" href="../..">to Cocoon Samples main page</sample>
+ <sample name="Back" href="..">to Cocoon Blocks Samples main page</sample>
+ </group>
+
+ <group name="Captcha">
+ <sample name="Simple Captcha" href="simple">
+ Shows an example of how to use a simple CAPTCHA using FlowScript.
+ </sample>
+ <sample name="Custom Captcha" href="custom">
+ Shows a page helping the customization of CAPTCHAs.
+ </sample>
+ </group>
+
+ <group name="Avaliable Documentation">
+ <sample name="Captcha Block Documentation"
+ href="http://cocoon.zones.apache.org/daisy/documentation/blocks/captcha.html">
+ On-line documentation for the Captcha block.
+ </sample>
+ <sample name="CaptchaReader Documentation"
+ href="http://cocoon.zones.apache.org/daisy/documentation/components/readers/captchareader.html">
+ On-line documentation for the CaptchaReader component.
+ </sample>
+ </group>
+
+
+</samples>