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del[awt]: delete awt dependency

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godotg
2023-09-02 19:14:02 +08:00
parent 9bc3df8537
commit 00bb1e37a0
23 changed files with 0 additions and 2398 deletions
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util/src/main/java/com/zfoo/util/captcha/ArithmeticCaptcha.java
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/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha;
import com.zfoo.protocol.util.IOUtils;
import com.zfoo.util.captcha.model.AbstractCaptcha;
import com.zfoo.util.math.RandomUtils;
import org.springframework.expression.Expression;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.Operation;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
/**
* png格式验证码
*
* @author godotg
* @version 3.0
*/
public class ArithmeticCaptcha extends AbstractCaptcha {
/**
* 计算公式
*/
private String arithmeticString;
@Override
public void buildCaptcha() {
var sb = new StringBuilder();
for (var i = 1; i <= length; i++) {
sb.append(RandomUtils.randomInt(10));
if (i == length) {
break;
}
var operation = RandomUtils.randomEle(List.of(Operation.ADD, Operation.SUBTRACT, Operation.MULTIPLY));
switch (operation) {
case ADD:
sb.append("+");
break;
case SUBTRACT:
sb.append("-");
break;
case MULTIPLY:
sb.append("x");
break;
default:
}
}
ExpressionParser parser = new SpelExpressionParser();
Expression exp = parser.parseExpression(sb.toString().replaceAll("x", "*"));
captcha = exp.getValue(String.class);
sb.append("=?");
arithmeticString = sb.toString();
}
/**
* 生成验证码
*/
@Override
public void drawImage(OutputStream out) {
var captchaChars = arithmeticString.toCharArray();
BufferedImage bi = null;
Graphics2D g2d = null;
try {
bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
g2d = (Graphics2D) bi.getGraphics();
// 填充背景
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, width, height);
// 抗锯齿
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// 画干扰圆
drawOval(2, g2d);
// 画字符串
g2d.setFont(getCaptchaFont().getFont());
FontMetrics fontMetrics = g2d.getFontMetrics();
int fW = width / captchaChars.length; // 每一个字符所占的宽度
int fSp = (fW - (int) fontMetrics.getStringBounds("8", g2d).getWidth()) / 2; // 字符的左右边距
for (int i = 0; i < captchaChars.length; i++) {
g2d.setColor(color());
int fY = height - ((height - (int) fontMetrics.getStringBounds(String.valueOf(captchaChars[i]), g2d).getHeight()) >> 1); // 文字的纵坐标
g2d.drawString(String.valueOf(captchaChars[i]), i * fW + fSp + 3, fY - 3);
}
ImageIO.write(bi, "png", out);
out.flush();
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
IOUtils.closeIO(out);
if (g2d != null) {
g2d.dispose();
}
if (bi != null) {
bi.getGraphics().dispose();
}
}
}
@Override
public String toBase64() {
return toBase64("data:image/png;base64,");
}
public String getArithmeticString() {
return arithmeticString;
}
public void setArithmeticString(String arithmeticString) {
this.arithmeticString = arithmeticString;
}
}
util/src/main/java/com/zfoo/util/captcha/GifCaptcha.java
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/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha;
import com.zfoo.protocol.util.IOUtils;
import com.zfoo.util.captcha.gif.GifEncoder;
import com.zfoo.util.captcha.model.AbstractCaptcha;
import com.zfoo.util.math.RandomUtils;
import java.awt.*;
import java.awt.geom.CubicCurve2D;
import java.awt.image.BufferedImage;
import java.io.OutputStream;
/**
* Gif验证码类
*
* @author godotg
* @version 3.0
*/
public class GifCaptcha extends AbstractCaptcha {
@Override
public void drawImage(OutputStream out) {
try {
char[] captchaChars = captcha.toCharArray(); // 获取验证码数组
// 随机生成每个文字的颜色
Color[] fontColor = new Color[length];
for (int i = 0; i < length; i++) {
fontColor[i] = color();
}
// 随机生成贝塞尔曲线参数
int x1 = 5, y1 = RandomUtils.randomInt(5, height / 2);
int x2 = width - 5, y2 = RandomUtils.randomInt(height / 2, height - 5);
int ctrlx = RandomUtils.randomInt(width / 4, width / 4 * 3), ctrly = RandomUtils.randomInt(5, height - 5);
if (RandomUtils.randomInt(2) == 0) {
int ty = y1;
y1 = y2;
y2 = ty;
}
int ctrlx1 = RandomUtils.randomInt(width / 4, width / 4 * 3), ctrly1 = RandomUtils.randomInt(5, height - 5);
int[][] besselXY = new int[][]{{x1, y1}, {ctrlx, ctrly}, {ctrlx1, ctrly1}, {x2, y2}};
// 开始画gif每一帧
GifEncoder gifEncoder = new GifEncoder();
gifEncoder.setQuality(180);
gifEncoder.setDelay(100);
gifEncoder.setRepeat(0);
gifEncoder.start(out);
for (int i = 0; i < length; i++) {
BufferedImage frame = drawImageFrame(fontColor, captchaChars, i, besselXY);
gifEncoder.addFrame(frame);
frame.flush();
}
gifEncoder.finish();
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
IOUtils.closeIO(out);
}
}
@Override
public String toBase64() {
return toBase64("data:image/gif;base64,");
}
/**
* 画随机码图
*
* @param fontColor 随机字体颜色
* @param strs 字符数组
* @param flag 透明度
* @param besselXY 干扰线参数
* @return BufferedImage
*/
private BufferedImage drawImageFrame(Color[] fontColor, char[] strs, int flag, int[][] besselXY) {
BufferedImage bi = null;
Graphics2D g2d = null;
try {
bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
g2d = (Graphics2D) bi.getGraphics();
// 填充背景颜色
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, width, height);
// 抗锯齿
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// 画干扰圆圈
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.1f * RandomUtils.randomInt(10))); // 设置透明度
drawOval(2, g2d);
// 画干扰线
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f)); // 设置透明度
g2d.setStroke(new BasicStroke(1.2f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
g2d.setColor(fontColor[0]);
CubicCurve2D shape = new CubicCurve2D.Double(besselXY[0][0], besselXY[0][1], besselXY[1][0], besselXY[1][1], besselXY[2][0], besselXY[2][1], besselXY[3][0], besselXY[3][1]);
g2d.draw(shape);
// 画验证码
g2d.setFont(getCaptchaFont().getFont());
FontMetrics fontMetrics = g2d.getFontMetrics();
int fW = width / strs.length; // 每一个字符所占的宽度
int fSp = (fW - (int) fontMetrics.getStringBounds("W", g2d).getWidth()) / 2; // 字符的左右边距
for (int i = 0; i < strs.length; i++) {
// 设置透明度
AlphaComposite ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
g2d.setComposite(ac3);
g2d.setColor(fontColor[i]);
int fY = height - ((height - (int) fontMetrics.getStringBounds(String.valueOf(strs[i]), g2d).getHeight()) >> 1); // 文字的纵坐标
g2d.drawString(String.valueOf(strs[i]), i * fW + fSp + 3, fY - 3);
}
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
if (g2d != null) {
g2d.dispose();
}
if (bi != null) {
bi.getGraphics().dispose();
}
}
return bi;
}
/**
* 获取透明度,从0到1,自动计算步长
*
* @param i
* @param j
* @return 透明度
*/
private float getAlpha(int i, int j) {
int num = i + j;
float r = (float) 1 / (length - 1);
float s = length * r;
return num >= length ? (num * r - s) : num * r;
}
}
util/src/main/java/com/zfoo/util/captcha/PngCaptcha.java
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/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha;
import com.zfoo.protocol.util.IOUtils;
import com.zfoo.util.captcha.model.AbstractCaptcha;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
/**
* png格式验证码
*
* @author godotg
* @version 3.0
*/
public class PngCaptcha extends AbstractCaptcha {
@Override
public void drawImage(OutputStream out) {
var captchaChars = captcha.toCharArray();
BufferedImage bi = null;
Graphics2D g2d = null;
try {
bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
g2d = (Graphics2D) bi.getGraphics();
// 填充背景
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, width, height);
// 抗锯齿
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// 画干扰圆
drawOval(2, g2d);
// 画干扰线
g2d.setStroke(new BasicStroke(2f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
drawBesselLine(1, g2d);
// 画字符串
g2d.setFont(getCaptchaFont().getFont());
FontMetrics fontMetrics = g2d.getFontMetrics();
int fW = width / captchaChars.length; // 每一个字符所占的宽度
int fSp = (fW - (int) fontMetrics.getStringBounds("W", g2d).getWidth()) / 2; // 字符的左右边距
for (int i = 0; i < captchaChars.length; i++) {
g2d.setColor(color());
int fY = height - ((height - (int) fontMetrics.getStringBounds(String.valueOf(captchaChars[i]), g2d).getHeight()) >> 1); // 文字的纵坐标
g2d.drawString(String.valueOf(captchaChars[i]), i * fW + fSp + 3, fY - 3);
}
ImageIO.write(bi, "png", out);
out.flush();
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
IOUtils.closeIO(out);
if (g2d != null) {
g2d.dispose();
}
if (bi != null) {
bi.getGraphics().dispose();
}
}
}
@Override
public String toBase64() {
return toBase64("data:image/png;base64,");
}
}
util/src/main/java/com/zfoo/util/captcha/gif/Encoder.java
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/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha.gif;
import java.io.IOException;
import java.io.OutputStream;
/**
* @author godotg
* @version 3.0
*/
public class Encoder {
static final int BITS = 12;
static final int HSIZE = 5003; // 80% 占用率
private static final int EOF = -1;
int n_bits; // number of bits/code
int maxbits = BITS; // user settable max # bits/code
int maxcode; // maximum code, given n_bits
int maxmaxcode = 1 << BITS; // should NEVER generate this code
int[] htab = new int[HSIZE];
int[] codetab = new int[HSIZE];
int hsize = HSIZE; // for dynamic table sizing
int free_ent = 0; // first unused entry
// block compression parameters -- after all codes are used up,
// and compression rate changes, start over.
boolean clear_flg = false;
int g_init_bits;
int ClearCode;
int EOFCode;
int cur_accum = 0;
int cur_bits = 0;
// Algorithm: use open addressing double hashing (no chaining) on the
// prefix code / next character combination. We do a variant of Knuth's
// algorithm D (vol. 3, sec. 6.4) along with G. Knott's relatively-prime
// secondary probe. Here, the modular division first probe is gives way
// to a faster exclusive-or manipulation. Also do block compression with
// an adaptive reset, whereby the code table is cleared when the compression
// ratio decreases, but after the table fills. The variable-length output
// codes are re-sized at this point, and a special CLEAR code is generated
// for the decompressor. Late addition: construct the table according to
// file size for noticeable speed improvement on small files. Please direct
// questions about this implementation to ames!jaw.
int[] masks =
{
0x0000,
0x0001,
0x0003,
0x0007,
0x000F,
0x001F,
0x003F,
0x007F,
0x00FF,
0x01FF,
0x03FF,
0x07FF,
0x0FFF,
0x1FFF,
0x3FFF,
0x7FFF,
0xFFFF};
// Number of characters so far in this 'packet'
int a_count;
// Define the storage for the packet accumulator
byte[] accum = new byte[256];
// output
//
// Output the given code.
// Inputs:
// code: A n_bits-bit integer. If == -1, then EOF. This assumes
// that n_bits =< wordsize - 1.
// Outputs:
// Outputs code to the file.
// Assumptions:
// Chars are 8 bits long.
// Algorithm:
// Maintain a BITS character long buffer (so that 8 codes will
// fit in it exactly). Use the VAX insv instruction to insert each
// code in turn. When the buffer fills up empty it and start over.
// 图片的宽高
private final int imgW;
private final int imgH;
private final byte[] pixAry;
private final int initCodeSize; // 验证码位数
private int remaining; // 剩余数量
private int curPixel; // 像素
//----------------------------------------------------------------------------
/**
* @param width 宽度
* @param height 高度
* @param pixels 像素
* @param color_depth 颜色
*/
Encoder(int width, int height, byte[] pixels, int color_depth) {
imgW = width;
imgH = height;
pixAry = pixels;
initCodeSize = Math.max(2, color_depth);
}
// Add a character to the end of the current packet, and if it is 254
// characters, flush the packet to disk.
/**
* @param c 字节
* @param outs 输出流
* @throws IOException IO异常
*/
void char_out(byte c, OutputStream outs) throws IOException {
accum[a_count++] = c;
if (a_count >= 254) {
flush_char(outs);
}
}
// Clear out the hash table
// table clear for block compress
/**
* @param outs 输出流
* @throws IOException IO异常
*/
void cl_block(OutputStream outs) throws IOException {
cl_hash(hsize);
free_ent = ClearCode + 2;
clear_flg = true;
output(ClearCode, outs);
}
// reset code table
/**
* @param hsize int
*/
void cl_hash(int hsize) {
for (int i = 0; i < hsize; ++i) {
htab[i] = -1;
}
}
/**
* @param init_bits int
* @param outs 输出流
* @throws IOException IO异常
*/
void compress(int init_bits, OutputStream outs) throws IOException {
int fcode;
int i /* = 0 */;
int c;
int ent;
int disp;
int hsize_reg;
int hshift;
// Set up the globals: g_init_bits - initial number of bits
g_init_bits = init_bits;
// Set up the necessary values
clear_flg = false;
n_bits = g_init_bits;
maxcode = MAXCODE(n_bits);
ClearCode = 1 << (init_bits - 1);
EOFCode = ClearCode + 1;
free_ent = ClearCode + 2;
a_count = 0; // clear packet
ent = nextPixel();
hshift = 0;
for (fcode = hsize; fcode < 65536; fcode *= 2) {
++hshift;
}
hshift = 8 - hshift; // set hash code range bound
hsize_reg = hsize;
cl_hash(hsize_reg); // clear hash table
output(ClearCode, outs);
outer_loop:
while ((c = nextPixel()) != EOF) {
fcode = (c << maxbits) + ent;
i = (c << hshift) ^ ent; // xor hashing
if (htab[i] == fcode) {
ent = codetab[i];
continue;
} else if (htab[i] >= 0) // non-empty slot
{
disp = hsize_reg - i; // secondary hash (after G. Knott)
if (i == 0) {
disp = 1;
}
do {
if ((i -= disp) < 0) {
i += hsize_reg;
}
if (htab[i] == fcode) {
ent = codetab[i];
continue outer_loop;
}
} while (htab[i] >= 0);
}
output(ent, outs);
ent = c;
if (free_ent < maxmaxcode) {
codetab[i] = free_ent++; // code -> hashtable
htab[i] = fcode;
} else {
cl_block(outs);
}
}
// Put out the final code.
output(ent, outs);
output(EOFCode, outs);
}
//----------------------------------------------------------------------------
/**
* @param os 输出流
* @throws IOException IO异常
*/
void encode(OutputStream os) throws IOException {
os.write(initCodeSize); // write "initial code size" byte
remaining = imgW * imgH; // reset navigation variables
curPixel = 0;
compress(initCodeSize + 1, os); // compress and write the pixel data
os.write(0); // write block terminator
}
// Flush the packet to disk, and reset the accumulator
/**
* @param outs 输出流
* @throws IOException IO异常
*/
void flush_char(OutputStream outs) throws IOException {
if (a_count > 0) {
outs.write(a_count);
outs.write(accum, 0, a_count);
a_count = 0;
}
}
/**
* @param n_bits int
* @return int
*/
final int MAXCODE(int n_bits) {
return (1 << n_bits) - 1;
}
//----------------------------------------------------------------------------
// Return the next pixel from the image
//----------------------------------------------------------------------------
/**
* @return int
*/
private int nextPixel() {
if (remaining == 0) {
return EOF;
}
--remaining;
byte pix = pixAry[curPixel++];
return pix & 0xff;
}
/**
* @param code int
* @param outs 输出流
* @throws IOException IO异常
*/
void output(int code, OutputStream outs) throws IOException {
cur_accum &= masks[cur_bits];
if (cur_bits > 0) {
cur_accum |= (code << cur_bits);
} else {
cur_accum = code;
}
cur_bits += n_bits;
while (cur_bits >= 8) {
char_out((byte) (cur_accum & 0xff), outs);
cur_accum >>= 8;
cur_bits -= 8;
}
// If the next entry is going to be too big for the code size,
// then increase it, if possible.
if (free_ent > maxcode || clear_flg) {
if (clear_flg) {
maxcode = MAXCODE(n_bits = g_init_bits);
clear_flg = false;
} else {
++n_bits;
if (n_bits == maxbits) {
maxcode = maxmaxcode;
} else {
maxcode = MAXCODE(n_bits);
}
}
}
if (code == EOFCode) {
// At EOF, write the rest of the buffer.
while (cur_bits > 0) {
char_out((byte) (cur_accum & 0xff), outs);
cur_accum >>= 8;
cur_bits -= 8;
}
flush_char(outs);
}
}
}
util/src/main/java/com/zfoo/util/captcha/gif/GifEncoder.java
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/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha.gif;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import java.io.*;
public class GifEncoder {
protected int width; // image size
protected int height;
protected Color transparent = null; // transparent color if given
protected int transIndex; // transparent index in color table
protected int repeat = -1; // no repeat
protected int delay = 0; // frame delay (hundredths)
protected boolean started = false; // ready to output frames
protected OutputStream out;
protected BufferedImage image; // current frame
protected byte[] pixels; // BGR byte array from frame
protected byte[] indexedPixels; // converted frame indexed to palette
protected int colorDepth; // number of bit planes
protected byte[] colorTab; // RGB palette
protected boolean[] usedEntry = new boolean[256]; // active palette entries
protected int palSize = 7; // color table size (bits-1)
protected int dispose = -1; // disposal code (-1 = use default)
protected boolean closeStream = false; // close stream when finished
protected boolean firstFrame = true;
protected boolean sizeSet = false; // if false, get size from first frame
protected int sample = 10; // default sample interval for quantizer
/**
* Sets the delay time between each frame, or changes it
* for subsequent frames (applies to last frame added).
*
* @param ms int delay time in milliseconds
*/
public void setDelay(int ms) {
delay = Math.round(ms / 10.0f);
}
/**
* Sets the GIF frame disposal code for the last added frame
* and any subsequent frames. Default is 0 if no transparent
* color has been set, otherwise 2.
*
* @param code int disposal code.
*/
public void setDispose(int code) {
if (code >= 0) {
dispose = code;
}
}
/**
* Sets the number of times the set of GIF frames
* should be played. Default is 1; 0 means play
* indefinitely. Must be invoked before the first
* image is added.
*
* @param iter int number of iterations.
*/
public void setRepeat(int iter) {
if (iter >= 0) {
repeat = iter;
}
}
/**
* Sets the transparent color for the last added frame
* and any subsequent frames.
* Since all colors are subject to modification
* in the quantization process, the color in the final
* palette for each frame closest to the given color
* becomes the transparent color for that frame.
* May be set to null to indicate no transparent color.
*
* @param c Color to be treated as transparent on display.
*/
public void setTransparent(Color c) {
transparent = c;
}
/**
* Adds next GIF frame. The frame is not written immediately, but is
* actually deferred until the next frame is received so that timing
* data can be inserted. Invoking <code>finish()</code> flushes all
* frames. If <code>setSize</code> was not invoked, the size of the
* first image is used for all subsequent frames.
*
* @param im BufferedImage containing frame to write.
* @return true if successful.
*/
public boolean addFrame(BufferedImage im) {
if ((im == null) || !started) {
return false;
}
boolean ok = true;
try {
if (!sizeSet) {
// use first frame's size
setSize(im.getWidth(), im.getHeight());
}
image = im;
getImagePixels(); // convert to correct format if necessary
analyzePixels(); // build color table & map pixels
if (firstFrame) {
writeLSD(); // logical screen descriptior
writePalette(); // global color table
if (repeat >= 0) {
// use NS app extension to indicate reps
writeNetscapeExt();
}
}
writeGraphicCtrlExt(); // write graphic control extension
writeImageDesc(); // image descriptor
if (!firstFrame) {
writePalette(); // local color table
}
writePixels(); // encode and write pixel data
firstFrame = false;
} catch (IOException e) {
ok = false;
}
return ok;
}
//added by alvaro
public boolean outFlush() {
boolean ok = true;
try {
out.flush();
return ok;
} catch (IOException e) {
ok = false;
}
return ok;
}
public byte[] getFrameByteArray() {
return ((ByteArrayOutputStream) out).toByteArray();
}
/**
* Flushes any pending data and closes output file.
* If writing to an OutputStream, the stream is not
* closed.
*
* @return boolean
*/
public boolean finish() {
if (!started) {
return false;
}
boolean ok = true;
started = false;
try {
out.write(0x3b); // gif trailer
out.flush();
if (closeStream) {
out.close();
}
} catch (IOException e) {
ok = false;
}
return ok;
}
public void reset() {
// reset for subsequent use
transIndex = 0;
out = null;
image = null;
pixels = null;
indexedPixels = null;
colorTab = null;
closeStream = false;
firstFrame = true;
}
/**
* Sets frame rate in frames per second. Equivalent to
* <code>setDelay(1000/fps)</code>.
*
* @param fps float frame rate (frames per second)
*/
public void setFrameRate(float fps) {
if (fps != 0f) {
delay = Math.round(100f / fps);
}
}
/**
* Sets quality of color quantization (conversion of images
* to the maximum 256 colors allowed by the GIF specification).
* Lower values (minimum = 1) produce better colors, but slow
* processing significantly. 10 is the default, and produces
* good color mapping at reasonable speeds. Values greater
* than 20 do not yield significant improvements in speed.
*
* @param quality int greater than 0.
*/
public void setQuality(int quality) {
if (quality < 1) {
quality = 1;
}
sample = quality;
}
/**
* Sets the GIF frame size. The default size is the
* size of the first frame added if this method is
* not invoked.
*
* @param w int frame width.
* @param h int frame width.
*/
public void setSize(int w, int h) {
if (started && !firstFrame) {
return;
}
width = w;
height = h;
if (width < 1) {
width = 320;
}
if (height < 1) {
height = 240;
}
sizeSet = true;
}
/**
* Initiates GIF file creation on the given stream. The stream
* is not closed automatically.
*
* @param os OutputStream on which GIF images are written.
* @return false if initial write failed.
*/
public boolean start(OutputStream os) {
if (os == null) {
return false;
}
boolean ok = true;
closeStream = false;
out = os;
try {
writeString("GIF89a"); // header
} catch (IOException e) {
ok = false;
}
return started = ok;
}
/**
* Initiates writing of a GIF file with the specified name.
*
* @param file String containing output file name.
* @return false if open or initial write failed.
*/
public boolean start(String file) {
boolean ok = true;
try {
out = new BufferedOutputStream(new FileOutputStream(file));
ok = start(out);
closeStream = true;
} catch (IOException e) {
ok = false;
}
return started = ok;
}
/**
* Analyzes image colors and creates color map.
*/
protected void analyzePixels() {
int len = pixels.length;
int nPix = len / 3;
indexedPixels = new byte[nPix];
Quant nq = new Quant(pixels, len, sample);
// initialize quantizer
colorTab = nq.process(); // create reduced palette
// convert map from BGR to RGB
for (int i = 0; i < colorTab.length; i += 3) {
byte temp = colorTab[i];
colorTab[i] = colorTab[i + 2];
colorTab[i + 2] = temp;
usedEntry[i / 3] = false;
}
// map image pixels to new palette
int k = 0;
for (int i = 0; i < nPix; i++) {
int index =
nq.map(pixels[k++] & 0xff,
pixels[k++] & 0xff,
pixels[k++] & 0xff);
usedEntry[index] = true;
indexedPixels[i] = (byte) index;
}
pixels = null;
colorDepth = 8;
palSize = 7;
// get closest match to transparent color if specified
if (transparent != null) {
transIndex = findClosest(transparent);
}
}
/**
* Returns index of palette color closest to c
*
* @param c color
* @return int
*/
protected int findClosest(Color c) {
if (colorTab == null) {
return -1;
}
int r = c.getRed();
int g = c.getGreen();
int b = c.getBlue();
int minpos = 0;
int dmin = 256 * 256 * 256;
int len = colorTab.length;
for (int i = 0; i < len; ) {
int dr = r - (colorTab[i++] & 0xff);
int dg = g - (colorTab[i++] & 0xff);
int db = b - (colorTab[i] & 0xff);
int d = dr * dr + dg * dg + db * db;
int index = i / 3;
if (usedEntry[index] && (d < dmin)) {
dmin = d;
minpos = index;
}
i++;
}
return minpos;
}
/**
* Extracts image pixels into byte array "pixels"
*/
protected void getImagePixels() {
int w = image.getWidth();
int h = image.getHeight();
int type = image.getType();
if ((w != width)
|| (h != height)
|| (type != BufferedImage.TYPE_3BYTE_BGR)) {
// create new image with right size/format
BufferedImage temp =
new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
Graphics2D g = temp.createGraphics();
g.drawImage(image, 0, 0, null);
image = temp;
}
pixels = ((DataBufferByte) image.getRaster().getDataBuffer()).getData();
}
/**
* Writes Graphic Control Extension
*
* @throws IOException IO异常
*/
protected void writeGraphicCtrlExt() throws IOException {
out.write(0x21); // extension introducer
out.write(0xf9); // GCE label
out.write(4); // data block size
int transp, disp;
if (transparent == null) {
transp = 0;
disp = 0; // dispose = no action
} else {
transp = 1;
disp = 2; // force clear if using transparent color
}
if (dispose >= 0) {
disp = dispose & 7; // user override
}
disp <<= 2;
// packed fields
out.write(0 | // 1:3 reserved
disp | // 4:6 disposal
0 | // 7 user input - 0 = none
transp); // 8 transparency flag
writeShort(delay); // delay x 1/100 sec
out.write(transIndex); // transparent color index
out.write(0); // block terminator
}
/**
* Writes Image Descriptor
*
* @throws IOException IO异常
*/
protected void writeImageDesc() throws IOException {
out.write(0x2c); // image separator
writeShort(0); // image position x,y = 0,0
writeShort(0);
writeShort(width); // image size
writeShort(height);
// packed fields
if (firstFrame) {
// no LCT - GCT is used for first (or only) frame
out.write(0);
} else {
// specify normal LCT
out.write(0x80 | // 1 local color table 1=yes
0 | // 2 interlace - 0=no
0 | // 3 sorted - 0=no
0 | // 4-5 reserved
palSize); // 6-8 size of color table
}
}
/**
* Writes Logical Screen Descriptor
*
* @throws IOException IO异常
*/
protected void writeLSD() throws IOException {
// logical screen size
writeShort(width);
writeShort(height);
// packed fields
out.write((0x80 | // 1 : global color table flag = 1 (gct used)
0x70 | // 2-4 : color resolution = 7
0x00 | // 5 : gct sort flag = 0
palSize)); // 6-8 : gct size
out.write(0); // background color index
out.write(0); // pixel aspect ratio - assume 1:1
}
/**
* Writes Netscape application extension to define
* repeat count.
*
* @throws IOException IO异常
*/
protected void writeNetscapeExt() throws IOException {
out.write(0x21); // extension introducer
out.write(0xff); // app extension label
out.write(11); // block size
writeString("NETSCAPE" + "2.0"); // app id + auth code
out.write(3); // sub-block size
out.write(1); // loop sub-block id
writeShort(repeat); // loop count (extra iterations, 0=repeat forever)
out.write(0); // block terminator
}
/**
* Writes color table
*
* @throws IOException IO异常
*/
protected void writePalette() throws IOException {
out.write(colorTab, 0, colorTab.length);
int n = (3 * 256) - colorTab.length;
for (int i = 0; i < n; i++) {
out.write(0);
}
}
/**
* Encodes and writes pixel data
*
* @throws IOException IO异常
*/
protected void writePixels() throws IOException {
Encoder encoder = new Encoder(width, height, indexedPixels, colorDepth);
encoder.encode(out);
}
/**
* Write 16-bit value to output stream, LSB first
*
* @param value int
* @throws IOException IO异常
*/
protected void writeShort(int value) throws IOException {
out.write(value & 0xff);
out.write((value >> 8) & 0xff);
}
/**
* Writes string to output stream
*
* @param s string
* @throws IOException IO异常
*/
protected void writeString(String s) throws IOException {
for (int i = 0; i < s.length(); i++) {
out.write((byte) s.charAt(i));
}
}
}
util/src/main/java/com/zfoo/util/captcha/gif/Quant.java
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/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha.gif;
/**
* @author godotg
* @version 3.0
*/
public class Quant {
protected static final int netsize = 256; /* number of colours used */
/* four primes near 500 - assume no image has a length so large */
/* that it is divisible by all four primes */
protected static final int prime1 = 499;
protected static final int prime2 = 491;
protected static final int prime3 = 487;
protected static final int prime4 = 503;
protected static final int minpicturebytes = (3 * prime4);
/* minimum size for input image */
/* Program Skeleton
----------------
[select samplefac in range 1..30]
[read image from input file]
pic = (unsigned char*) malloc(3*width*height);
initnet(pic,3*width*height,samplefac);
learn();
unbiasnet();
[write output image header, using writecolourmap(f)]
inxbuild();
write output image using inxsearch(b,g,r) */
/* Network Definitions
------------------- */
protected static final int maxnetpos = (netsize - 1);
protected static final int netbiasshift = 4; /* bias for colour values */
protected static final int ncycles = 100; /* no. of learning cycles */
/* defs for freq and bias */
protected static final int intbiasshift = 16; /* bias for fractions */
protected static final int intbias = (1 << intbiasshift);
protected static final int gammashift = 10; /* gamma = 1024 */
protected static final int gamma = (1 << gammashift);
protected static final int betashift = 10;
protected static final int beta = (intbias >> betashift); /* beta = 1/1024 */
protected static final int betagamma =
(intbias << (gammashift - betashift));
/* defs for decreasing radius factor */
protected static final int initrad = (netsize >> 3); /* for 256 cols, radius starts */
protected static final int radiusbiasshift = 6; /* at 32.0 biased by 6 bits */
protected static final int radiusbias = (1 << radiusbiasshift);
protected static final int initradius = (initrad * radiusbias); /* and decreases by a */
protected static final int radiusdec = 30; /* factor of 1/30 each cycle */
/* defs for decreasing alpha factor */
protected static final int alphabiasshift = 10; /* alpha starts at 1.0 */
protected static final int initalpha = (1 << alphabiasshift);
/* radbias and alpharadbias used for radpower calculation */
protected static final int radbiasshift = 8;
protected static final int radbias = (1 << radbiasshift);
protected static final int alpharadbshift = (alphabiasshift + radbiasshift);
protected static final int alpharadbias = (1 << alpharadbshift);
protected int alphadec; /* biased by 10 bits */
/* Types and Global Variables
-------------------------- */
protected byte[] thepicture; /* the input image itself */
protected int lengthcount; /* lengthcount = H*W*3 */
protected int samplefac; /* sampling factor 1..30 */
// typedef int pixel[4]; /* BGRc */
protected int[][] network; /* the network itself - [netsize][4] */
protected int[] netindex = new int[256];
/* for network lookup - really 256 */
protected int[] bias = new int[netsize];
/* bias and freq arrays for learning */
protected int[] freq = new int[netsize];
protected int[] radpower = new int[initrad];
/* radpower for precomputation */
/* Initialise network in range (0,0,0) to (255,255,255) and set parameters
----------------------------------------------------------------------- */
public Quant(byte[] thepic, int len, int sample) {
int i;
int[] p;
thepicture = thepic;
lengthcount = len;
samplefac = sample;
network = new int[netsize][];
for (i = 0; i < netsize; i++) {
network[i] = new int[4];
p = network[i];
p[0] = p[1] = p[2] = (i << (netbiasshift + 8)) / netsize;
freq[i] = intbias / netsize; /* 1/netsize */
bias[i] = 0;
}
}
public byte[] colorMap() {
byte[] map = new byte[3 * netsize];
int[] index = new int[netsize];
for (int i = 0; i < netsize; i++) {
index[network[i][3]] = i;
}
int k = 0;
for (int i = 0; i < netsize; i++) {
int j = index[i];
map[k++] = (byte) (network[j][0]);
map[k++] = (byte) (network[j][1]);
map[k++] = (byte) (network[j][2]);
}
return map;
}
/* Insertion sort of network and building of netindex[0..255] (to do after unbias)
------------------------------------------------------------------------------- */
public void inxbuild() {
int i, j, smallpos, smallval;
int[] p;
int[] q;
int previouscol, startpos;
previouscol = 0;
startpos = 0;
for (i = 0; i < netsize; i++) {
p = network[i];
smallpos = i;
smallval = p[1]; /* index on g */
/* find smallest in i..netsize-1 */
for (j = i + 1; j < netsize; j++) {
q = network[j];
if (q[1] < smallval) { /* index on g */
smallpos = j;
smallval = q[1]; /* index on g */
}
}
q = network[smallpos];
/* swap p (i) and q (smallpos) entries */
if (i != smallpos) {
j = q[0];
q[0] = p[0];
p[0] = j;
j = q[1];
q[1] = p[1];
p[1] = j;
j = q[2];
q[2] = p[2];
p[2] = j;
j = q[3];
q[3] = p[3];
p[3] = j;
}
/* smallval entry is now in position i */
if (smallval != previouscol) {
netindex[previouscol] = (startpos + i) >> 1;
for (j = previouscol + 1; j < smallval; j++) {
netindex[j] = i;
}
previouscol = smallval;
startpos = i;
}
}
netindex[previouscol] = (startpos + maxnetpos) >> 1;
for (j = previouscol + 1; j < 256; j++) {
netindex[j] = maxnetpos; /* really 256 */
}
}
/* Main Learning Loop
------------------ */
public void learn() {
int i, j, b, g, r;
int radius, rad, alpha, step, delta, samplepixels;
byte[] p;
int pix, lim;
if (lengthcount < minpicturebytes) {
samplefac = 1;
}
alphadec = 30 + ((samplefac - 1) / 3);
p = thepicture;
pix = 0;
lim = lengthcount;
samplepixels = lengthcount / (3 * samplefac);
delta = samplepixels / ncycles;
alpha = initalpha;
radius = initradius;
rad = radius >> radiusbiasshift;
if (rad <= 1) {
rad = 0;
}
for (i = 0; i < rad; i++) {
radpower[i] =
alpha * (((rad * rad - i * i) * radbias) / (rad * rad));
}
//fprintf(stderr,"beginning 1D learning: initial radius=%d\n", rad);
if (lengthcount < minpicturebytes) {
step = 3;
} else if ((lengthcount % prime1) != 0) {
step = 3 * prime1;
} else {
if ((lengthcount % prime2) != 0) {
step = 3 * prime2;
} else {
if ((lengthcount % prime3) != 0) {
step = 3 * prime3;
} else {
step = 3 * prime4;
}
}
}
i = 0;
while (i < samplepixels) {
b = (p[pix + 0] & 0xff) << netbiasshift;
g = (p[pix + 1] & 0xff) << netbiasshift;
r = (p[pix + 2] & 0xff) << netbiasshift;
j = contest(b, g, r);
altersingle(alpha, j, b, g, r);
if (rad != 0) {
alterneigh(rad, j, b, g, r); /* alter neighbours */
}
pix += step;
if (pix >= lim) {
pix -= lengthcount;
}
i++;
if (delta == 0) {
delta = 1;
}
if (i % delta == 0) {
alpha -= alpha / alphadec;
radius -= radius / radiusdec;
rad = radius >> radiusbiasshift;
if (rad <= 1) {
rad = 0;
}
for (j = 0; j < rad; j++) {
radpower[j] =
alpha * (((rad * rad - j * j) * radbias) / (rad * rad));
}
}
}
//fprintf(stderr,"finished 1D learning: final alpha=%f !\n",((float)alpha)/initalpha);
}
/* Search for BGR values 0..255 (after net is unbiased) and return colour index
---------------------------------------------------------------------------- */
public int map(int b, int g, int r) {
int i, j, dist, a, bestd;
int[] p;
int best;
bestd = 1000; /* biggest possible dist is 256*3 */
best = -1;
i = netindex[g]; /* index on g */
j = i - 1; /* start at netindex[g] and work outwards */
while ((i < netsize) || (j >= 0)) {
if (i < netsize) {
p = network[i];
dist = p[1] - g; /* inx key */
if (dist >= bestd) {
i = netsize; /* stop iter */
} else {
i++;
if (dist < 0) {
dist = -dist;
}
a = p[0] - b;
if (a < 0) {
a = -a;
}
dist += a;
if (dist < bestd) {
a = p[2] - r;
if (a < 0) {
a = -a;
}
dist += a;
if (dist < bestd) {
bestd = dist;
best = p[3];
}
}
}
}
if (j >= 0) {
p = network[j];
dist = g - p[1]; /* inx key - reverse dif */
if (dist >= bestd) {
j = -1; /* stop iter */
} else {
j--;
if (dist < 0) {
dist = -dist;
}
a = p[0] - b;
if (a < 0) {
a = -a;
}
dist += a;
if (dist < bestd) {
a = p[2] - r;
if (a < 0) {
a = -a;
}
dist += a;
if (dist < bestd) {
bestd = dist;
best = p[3];
}
}
}
}
}
return (best);
}
public byte[] process() {
learn();
unbiasnet();
inxbuild();
return colorMap();
}
/* Unbias network to give byte values 0..255 and record position i to prepare for sort
----------------------------------------------------------------------------------- */
public void unbiasnet() {
int i, j;
for (i = 0; i < netsize; i++) {
network[i][0] >>= netbiasshift;
network[i][1] >>= netbiasshift;
network[i][2] >>= netbiasshift;
network[i][3] = i; /* record colour no */
}
}
/* Move adjacent neurons by precomputed alpha*(1-((i-j)^2/[r]^2)) in radpower[|i-j|]
--------------------------------------------------------------------------------- */
protected void alterneigh(int rad, int i, int b, int g, int r) {
int j, k, lo, hi, a, m;
int[] p;
lo = i - rad;
if (lo < -1) {
lo = -1;
}
hi = i + rad;
if (hi > netsize) {
hi = netsize;
}
j = i + 1;
k = i - 1;
m = 1;
while ((j < hi) || (k > lo)) {
a = radpower[m++];
if (j < hi) {
p = network[j++];
try {
p[0] -= (a * (p[0] - b)) / alpharadbias;
p[1] -= (a * (p[1] - g)) / alpharadbias;
p[2] -= (a * (p[2] - r)) / alpharadbias;
} catch (Exception e) {
} // prevents 1.3 miscompilation
}
if (k > lo) {
p = network[k--];
try {
p[0] -= (a * (p[0] - b)) / alpharadbias;
p[1] -= (a * (p[1] - g)) / alpharadbias;
p[2] -= (a * (p[2] - r)) / alpharadbias;
} catch (Exception e) {
}
}
}
}
/* Move neuron i towards biased (b,g,r) by factor alpha
---------------------------------------------------- */
protected void altersingle(int alpha, int i, int b, int g, int r) {
/* alter hit neuron */
int[] n = network[i];
n[0] -= (alpha * (n[0] - b)) / initalpha;
n[1] -= (alpha * (n[1] - g)) / initalpha;
n[2] -= (alpha * (n[2] - r)) / initalpha;
}
/* Search for biased BGR values
---------------------------- */
protected int contest(int b, int g, int r) {
/* finds closest neuron (min dist) and updates freq */
/* finds best neuron (min dist-bias) and returns position */
/* for frequently chosen neurons, freq[i] is high and bias[i] is negative */
/* bias[i] = gamma*((1/netsize)-freq[i]) */
int i, dist, a, biasdist, betafreq;
int bestpos, bestbiaspos, bestd, bestbiasd;
int[] n;
bestd = ~(1 << 31);
bestbiasd = bestd;
bestpos = -1;
bestbiaspos = bestpos;
for (i = 0; i < netsize; i++) {
n = network[i];
dist = n[0] - b;
if (dist < 0) {
dist = -dist;
}
a = n[1] - g;
if (a < 0) {
a = -a;
}
dist += a;
a = n[2] - r;
if (a < 0) {
a = -a;
}
dist += a;
if (dist < bestd) {
bestd = dist;
bestpos = i;
}
biasdist = dist - ((bias[i]) >> (intbiasshift - netbiasshift));
if (biasdist < bestbiasd) {
bestbiasd = biasdist;
bestbiaspos = i;
}
betafreq = (freq[i] >> betashift);
freq[i] -= betafreq;
bias[i] += (betafreq << gammashift);
}
freq[bestpos] += beta;
bias[bestpos] -= betagamma;
return (bestbiaspos);
}
}
util/src/main/java/com/zfoo/util/captcha/model/AbstractCaptcha.java
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@@ -1,285 +0,0 @@
/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha.model;
import com.zfoo.protocol.util.IOUtils;
import com.zfoo.protocol.util.StringUtils;
import com.zfoo.util.math.RandomUtils;
import java.awt.*;
import java.awt.geom.CubicCurve2D;
import java.awt.geom.QuadCurve2D;
import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.util.Base64;
/**
* 验证码抽象类
*
* @author godotg
* @version 3.0
*/
public abstract class AbstractCaptcha {
/**
* 常用颜色
*/
private static final int[][] COLOR = new int[][]
{
{0, 135, 255},
{51, 153, 51},
{255, 102, 102},
{255, 153, 0},
{153, 102, 0},
{153, 102, 153},
{51, 153, 153},
{102, 102, 255},
{0, 102, 204},
{204, 51, 51},
{0, 153, 204},
{0, 51, 102}
};
/**
* 验证码随机字符长度
*/
protected int length = 5;
/**
* 验证码显示宽度
*/
protected int width = 130;
/**
* 验证码显示高度
*/
protected int height = 48;
/**
* 当前验证码
*/
protected String captcha;
private CaptchaCharEnum captchaChar = CaptchaCharEnum.ARAB_ENGLISH;
private CaptchaFontEnum captchaFont = CaptchaFontEnum.actionj;
public void buildCaptcha() {
switch (captchaChar) {
case ARAB_NUMBER:
captcha = RandomUtils.randomString(StringUtils.ARAB_NUMBER, length);
break;
case ENGLISH_CHAR:
captcha = RandomUtils.randomString(StringUtils.ENGLISH_CHAR, length);
break;
case ARAB_ENGLISH:
captcha = RandomUtils.randomString(length);
break;
default:
}
}
/**
* 给定范围获得随机颜色
*
* @param fc 0-255
* @param bc 0-255
* @return 随机颜色
*/
protected Color color(int fc, int bc) {
if (fc > 255) {
fc = 255;
}
if (bc > 255) {
bc = 255;
}
int r = fc + RandomUtils.randomInt(bc - fc);
int g = fc + RandomUtils.randomInt(bc - fc);
int b = fc + RandomUtils.randomInt(bc - fc);
return new Color(r, g, b);
}
/**
* 获取随机常用颜色
*
* @return 随机颜色
*/
protected Color color() {
int[] color = COLOR[RandomUtils.randomInt(COLOR.length)];
return new Color(color[0], color[1], color[2]);
}
/**
* 验证码输出,抽象方法，由子类实现
*/
public abstract void drawImage(OutputStream os);
/**
* 输出base64编码
*
* @return base64编码字符串
*/
public abstract String toBase64();
/**
* 输出base64编码
*
* @param type 编码头
* @return base64编码字符串
*/
public String toBase64(String type) {
var outputStream = new ByteArrayOutputStream();
drawImage(outputStream);
var base64 = type + Base64.getEncoder().encodeToString(outputStream.toByteArray());
IOUtils.closeIO(outputStream);
return base64;
}
/**
* 获取当前的验证码
*/
public String captcha() {
return captcha;
}
/**
* 随机画干扰线
*
* @param num 数量
* @param g Graphics2D
*/
public void drawLine(int num, Graphics2D g) {
drawLine(num, null, g);
}
/**
* 随机画干扰线
*
* @param num 数量
* @param color 颜色
* @param g Graphics2D
*/
public void drawLine(int num, Color color, Graphics2D g) {
for (int i = 0; i < num; i++) {
g.setColor(color == null ? color() : color);
int x1 = RandomUtils.randomInt(-10, width - 10);
int y1 = RandomUtils.randomInt(5, height - 5);
int x2 = RandomUtils.randomInt(10, width + 10);
int y2 = RandomUtils.randomInt(2, height - 2);
g.drawLine(x1, y1, x2, y2);
}
}
/**
* 随机画干扰圆
*
* @param num 数量
* @param g Graphics2D
*/
public void drawOval(int num, Graphics2D g) {
drawOval(num, null, g);
}
/**
* 随机画干扰圆
*
* @param num 数量
* @param color 颜色
* @param g Graphics2D
*/
public void drawOval(int num, Color color, Graphics2D g) {
for (int i = 0; i < num; i++) {
g.setColor(color == null ? color() : color);
int w = 5 + RandomUtils.randomInt(10);
g.drawOval(RandomUtils.randomInt(width - 25), RandomUtils.randomInt(height - 15), w, w);
}
}
/**
* 随机画贝塞尔曲线
*
* @param num 数量
* @param g Graphics2D
*/
public void drawBesselLine(int num, Graphics2D g) {
drawBesselLine(num, null, g);
}
/**
* 随机画贝塞尔曲线
*
* @param num 数量
* @param color 颜色
* @param g Graphics2D
*/
public void drawBesselLine(int num, Color color, Graphics2D g) {
for (var i = 0; i < num; i++) {
g.setColor(color == null ? color() : color);
int x1 = 5, y1 = RandomUtils.randomInt(5, height / 2);
int x2 = width - 5, y2 = RandomUtils.randomInt(height / 2, height - 5);
int ctrlx = RandomUtils.randomInt(width / 4, width / 4 * 3), ctrly = RandomUtils.randomInt(5, height - 5);
if (RandomUtils.randomInt(2) == 0) {
int ty = y1;
y1 = y2;
y2 = ty;
}
if (RandomUtils.randomInt(2) == 0) { // 二阶贝塞尔曲线
QuadCurve2D shape = new QuadCurve2D.Double();
shape.setCurve(x1, y1, ctrlx, ctrly, x2, y2);
g.draw(shape);
} else { // 三阶贝塞尔曲线
int ctrlx1 = RandomUtils.randomInt(width / 4, width / 4 * 3), ctrly1 = RandomUtils.randomInt(5, height - 5);
CubicCurve2D shape = new CubicCurve2D.Double(x1, y1, ctrlx, ctrly, ctrlx1, ctrly1, x2, y2);
g.draw(shape);
}
}
}
public CaptchaCharEnum getCaptchaChar() {
return captchaChar;
}
public void setCaptchaChar(CaptchaCharEnum captchaChar) {
this.captchaChar = captchaChar;
}
public CaptchaFontEnum getCaptchaFont() {
return captchaFont;
}
public void setCaptchaFont(CaptchaFontEnum captchaFont) {
this.captchaFont = captchaFont;
}
public int getLength() {
return length;
}
public void setLength(int length) {
this.length = length;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
}
util/src/main/java/com/zfoo/util/captcha/model/CaptchaCharEnum.java
-37
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@@ -1,37 +0,0 @@
/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha.model;
/**
* @author godotg
* @version 3.0
*/
public enum CaptchaCharEnum {
/**
* 纯数字
*/
ARAB_NUMBER,
/**
* 纯英文字母
*/
ENGLISH_CHAR,
/**
* 数字和英文结合
*/
ARAB_ENGLISH,
}
util/src/main/java/com/zfoo/util/captcha/model/CaptchaFontEnum.java
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@@ -1,73 +0,0 @@
/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha.model;
import com.zfoo.protocol.util.ClassUtils;
import com.zfoo.protocol.util.IOUtils;
import com.zfoo.protocol.util.StringUtils;
import java.awt.*;
import java.io.InputStream;
/**
* @author godotg
* @version 3.0
*/
public enum CaptchaFontEnum {
/**
* 默认字体
*/
actionj,
epilog,
fresnel,
headache,
lexo,
prefix,
progbot,
ransom,
robot,
scandal,
;
private static final Font DEFAULT_FONT = new Font("Arial", Font.BOLD, 32);
private final Font font;
CaptchaFontEnum() {
InputStream inputStream = null;
try {
inputStream = ClassUtils.getFileFromClassPath(StringUtils.format("captcha/{}.ttf", this.name()));
font = Font.createFont(Font.TRUETYPE_FONT, inputStream).deriveFont(Font.BOLD, 32f);
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
IOUtils.closeIO(inputStream);
}
}
public Font getFont() {
return font;
}
}
util/src/main/java/com/zfoo/util/math/RandomUtils.java
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@@ -15,7 +15,6 @@ package com.zfoo.util.math;
import com.zfoo.protocol.util.StringUtils;
import java.awt.*;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.security.NoSuchAlgorithmException;
@@ -408,14 +407,4 @@ public abstract class RandomUtils {
return baseString.charAt(getRandom().nextInt(baseString.length()));
}
/**
* 生成随机颜色
*
* @return 随机颜色
*/
public static Color randomColor() {
final Random random = getRandom();
return new Color(random.nextInt(255), random.nextInt(255), random.nextInt(255));
}
}
util/src/main/java/com/zfoo/util/math/lexer/LexicalAnalysis.java
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@@ -1,173 +0,0 @@
/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.math.lexer;
import com.zfoo.protocol.util.StringUtils;
import java.util.Set;
/**
* 词法分析器
*
* @author godotg
* @version 3.0
*/
public class LexicalAnalysis {
private static final Set<String> KEY_WORDS = Set.of("break", "include", "begin", "end", "if", "else", "while", "switch");
//判断是否是关键字
private boolean isKey(String str) {
return KEY_WORDS.contains(str);
}
//判断是否是字母
boolean isLetter(char letter) {
return StringUtils.isEnglishChar(letter);
}
//判断是否是数字
boolean isDigit(char digit) {
return Character.isDigit(digit);
}
//词法分析
void analyze(char[] chars) {
for (var i = 0; i < chars.length; i++) {
var ch = chars[i];
if (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r') {
continue;
}
var arr = "";
if (isLetter(ch)) {
while (isLetter(ch) || isDigit(ch)) {
arr += ch;
ch = chars[++i];
}
//回退一个字符
i--;
if (isKey(arr)) {
//关键字
System.out.println(arr + "\t4" + "\t关键字");
} else {
//标识符
System.out.println(arr + "\t4" + "\t标识符");
}
} else if (isDigit(ch) || (ch == '.')) {
while (isDigit(ch) || (ch == '.' && isDigit(chars[++i]))) {
if (ch == '.') {
i--;
}
arr = arr + ch;
ch = chars[++i];
}
//属于无符号常数
System.out.println(arr + "\t5" + "\t常数");
} else {
switch (ch) {
//运算符
case '+':
System.out.println(ch + "\t2" + "\t运算符");
break;
case '-':
System.out.println(ch + "\t2" + "\t运算符");
break;
case '*':
System.out.println(ch + "\t2" + "\t运算符");
break;
case '/':
System.out.println(ch + "\t2" + "\t运算符");
break;
//分界符
case '(':
System.out.println(ch + "\t3" + "\t分界符");
break;
case ')':
System.out.println(ch + "\t3" + "\t分界符");
break;
case '[':
System.out.println(ch + "\t3" + "\t分界符");
break;
case ']':
System.out.println(ch + "\t3" + "\t分界符");
break;
case ';':
System.out.println(ch + "\t3" + "\t分界符");
break;
case '{':
System.out.println(ch + "\t3" + "\t分界符");
break;
case '}':
System.out.println(ch + "\t3" + "\t分界符");
break;
// 字符串
case '"':
do {
arr += ch;
ch = chars[++i];
} while (ch != '"');
arr += ch;
System.out.println(arr + "\t3" + "\t字符串");
break;
//运算符
case '=': {
ch = chars[++i];
if (ch == '=') {
System.out.println("==" + "\t2" + "\t运算符");
} else {
System.out.println("=" + "\t2" + "\t运算符");
i--;
}
}
break;
case ':': {
ch = chars[++i];
if (ch == '=') {
System.out.println(":=" + "\t2" + "\t运算符");
} else {
System.out.println(":" + "\t2" + "\t运算符");
i--;
}
}
break;
case '>': {
ch = chars[++i];
if (ch == '=') {
System.out.println(">=" + "\t2" + "\t运算符");
} else {
System.out.println(">" + "\t2" + "\t运算符");
i--;
}
}
break;
case '<': {
ch = chars[++i];
if (ch == '=') {
System.out.println("<=" + "\t2" + "\t运算符");
} else {
System.out.println("<" + "\t2" + "\t运算符");
i--;
}
}
break;
//无识别
default:
System.out.println(ch + "\t6" + "\t无识别符");
}
}
}
}
}
util/src/main/resources/captcha/actionj.ttf
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util/src/test/java/com/zfoo/util/captcha/CaptchaTest.java
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@@ -1,84 +0,0 @@
/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.captcha;
import com.zfoo.util.captcha.model.CaptchaFontEnum;
import org.junit.Ignore;
import org.junit.Test;
import java.io.File;
import java.io.FileOutputStream;
/**
* @author godotg
* @version 3.0
*/
@Ignore
public class CaptchaTest {
@Test
public void pngTest() throws Exception {
for (var font : CaptchaFontEnum.values()) {
PngCaptcha pngCaptcha = new PngCaptcha();
pngCaptcha.setLength(4);
pngCaptcha.setCaptchaFont(font);
pngCaptcha.buildCaptcha();
System.out.println(pngCaptcha.captcha());
pngCaptcha.drawImage(new FileOutputStream(new File(font.name() + ".png")));
}
}
@Test
public void gifTest() throws Exception {
for (var font : CaptchaFontEnum.values()) {
GifCaptcha gifCaptcha = new GifCaptcha();
gifCaptcha.setLength(5);
gifCaptcha.setCaptchaFont(font);
gifCaptcha.buildCaptcha();
System.out.println(gifCaptcha.captcha());
gifCaptcha.drawImage(new FileOutputStream(new File(font.name() + ".gif")));
}
}
@Test
public void arithmeticTest() throws Exception {
for (var font : CaptchaFontEnum.values()) {
ArithmeticCaptcha specCaptcha = new ArithmeticCaptcha();
specCaptcha.setLength(3);
specCaptcha.setCaptchaFont(font);
specCaptcha.buildCaptcha();
System.out.println(specCaptcha.getArithmeticString() + " " + specCaptcha.captcha());
specCaptcha.drawImage(new FileOutputStream(new File(font.name() + ".png")));
}
}
@Test
public void base64Test() throws Exception {
for (var i = 0; i < Long.MAX_VALUE; i++) {
GifCaptcha gifCaptcha = new GifCaptcha();
gifCaptcha.buildCaptcha();
gifCaptcha.toBase64();
PngCaptcha pngCaptcha = new PngCaptcha();
pngCaptcha.buildCaptcha();
pngCaptcha.toBase64();
ArithmeticCaptcha arithmeticCaptcha = new ArithmeticCaptcha();
arithmeticCaptcha.buildCaptcha();
arithmeticCaptcha.toBase64();
}
}
}
util/src/test/java/com/zfoo/util/math/lexer/LexicalAnalysisTest.java
-37
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@@ -1,37 +0,0 @@
/*
* Copyright (C) 2020 The zfoo Authors
*
* 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 com.zfoo.util.math.lexer;
import org.junit.Test;
/**
* @author godotg
* @version 3.0
*/
public class LexicalAnalysisTest {
private static final String str = " void main() {\n" +
" if (a == 8) {\n" +
" c = c +2;\n" +
" b = 1.2;\n" +
" c = c + 3;\n" +
" d = \"hello world\";\n" +
" }\n" +
" }";
@Test
public void test() {
var lexical = new LexicalAnalysis();
lexical.analyze(str.toCharArray());
}
}