唉~衬吆,做個(gè)Web端的性能測(cè)試俱恶,第一步遇到的難題就是萬(wàn)惡的圖形驗(yàn)證碼,大家都知道驗(yàn)證碼的處理有以下幾點(diǎn):
1啥酱、找個(gè)善良樂(lè)于助人的開(kāi)發(fā)大大幫忙屏蔽一下驗(yàn)證碼
2、如果你和開(kāi)發(fā)大大關(guān)系夠鐵厨诸,開(kāi)個(gè)后門镶殷,整個(gè)萬(wàn)能驗(yàn)證碼
3、以上兩種都不可以的話微酬,掀桌(╯' - ')╯︵ ┻━┻走人~绘趋,
emmmm,開(kāi)玩笑的,趕緊快馬加鞭的gun回來(lái)颗管。以上兩種如果都不可以的話陷遮,咱們只能通過(guò)暴力手段,把開(kāi)發(fā)打殘了垦江。還是開(kāi)個(gè)玩笑了帽馋,畢竟是法制社會(huì)呢!言歸正傳比吭,以上兩種都不可以绽族,咱們只能寫(xiě)一個(gè)識(shí)別驗(yàn)證碼的插件了。
主要是參考大神的文章衩藤,我只是代碼的搬運(yùn)工https://blog.csdn.net/xreztento/article/details/48682923
一吧慢、準(zhǔn)備工具
1、Tesseract赏表,圖形圖像識(shí)別工具
2检诗、ApacheJmeter_core.jar匈仗,
3、 jorphon.jar
4逢慌、logkit-2.0.jar
5悠轩、jai-imageio-1.1.jar
6、 swingx-1.6.1.jar
7涕癣、eclipse
二、安裝Tesseract前标,將需要用的jar包導(dǎo)入到工程下
三坠韩、新建如下類
ImageIOHelper.java
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.Locale;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
import com.sun.media.imageio.plugins.tiff.TIFFImageWriteParam;
public class ImageIOHelper{
public static File createImage(File imageFile, String imageFormat) {
File tempFile = null;
ImageInputStream iis = null;
ImageOutputStream ios = null;
ImageReader reader = null;
ImageWriter writer = null;
try {
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
reader = readers.next();
iis = ImageIO.createImageInputStream(imageFile);
reader.setInput(iis);
IIOMetadata streamMetadata = reader.getStreamMetadata();
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.CHINESE);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("tiff");
writer = writers.next();
BufferedImage bi = removeBackgroud(reader.read(0));
IIOImage image = new IIOImage(bi,null,reader.getImageMetadata(0));
tempFile = tempImageFile(imageFile);
ios = ImageIO.createImageOutputStream(tempFile);
writer.setOutput(ios);
writer.write(streamMetadata, image, tiffWriteParam);
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if(iis != null){
try {
iis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(ios != null){
try {
ios.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(writer != null){
writer.dispose();
}
if(reader != null){
reader.dispose();
}
}
return tempFile;
}
private static File tempImageFile(File imageFile) {
String path = imageFile.getPath();
StringBuffer strB = new StringBuffer(path);
return new File(strB.toString().replaceFirst("jpg", "tif"));
}
public static int isFilter(int colorInt) {
Color color = new Color(colorInt);
if ((color.getRed() > 85 && color.getRed() < 255)
&& (color.getGreen() > 85 && color.getGreen() < 255)
&& (color.getBlue() > 85 && color.getBlue() < 255)) {
return 1;
}
return 0;
}
public static BufferedImage removeBackgroud(BufferedImage img)
throws Exception {
int width = img.getWidth();
int height = img.getHeight();
for (int x = 0; x < width; ++x) {
for (int y = 0; y < height; ++y) {
if (isFilter(img.getRGB(x, y)) == 1) {
img.setRGB(x, y, Color.WHITE.getRGB());
}
}
}
return img;
}
}
OCR.java
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
public class OCR {
private final String LANG_OPTION = "-l";
private final String EOL = System.getProperty("line.separator");
private String tessPath = "D://Tesseract-OCR";
public String recognizeText(File imageFile,String imageFormat) {
File tempImage = ImageIOHelper.createImage(imageFile,imageFormat);
File outputFile = new File(imageFile.getParentFile(),"output" + imageFile.getName());
StringBuffer sb = new StringBuffer();
List<String> cmd = new ArrayList<String>();
cmd.add(tessPath+"http://tesseract");
cmd.add("");
cmd.add(outputFile.getName());
cmd.add(LANG_OPTION);
cmd.add("eng");
ProcessBuilder pb = new ProcessBuilder();
pb.directory(imageFile.getParentFile());
cmd.set(1, tempImage.getName());
pb.command(cmd);
pb.redirectErrorStream(true);
Process process = null;
BufferedReader in = null;
int wait;
try {
process = pb.start();
//tesseract.exe xxx.tif 1 -l eng
wait = process.waitFor();
if(wait == 0){
in = new BufferedReader(new InputStreamReader(new FileInputStream(outputFile.getAbsolutePath()+".txt"),"UTF-8"));
String str;
while((str = in.readLine())!=null){
sb.append(str).append(EOL);
}
in.close();
}else{
tempImage.delete();
}
new File(outputFile.getAbsolutePath()+".txt").delete();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if(in != null){
try {
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
tempImage.delete();
return sb.toString();
}
}
VcodeExtractor.java
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Serializable;
import org.apache.jmeter.processor.PostProcessor;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jmeter.testelement.AbstractScopedTestElement;
import org.apache.jmeter.threads.JMeterContext;
import org.apache.jmeter.threads.JMeterVariables;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;
public class VcodeExtractor extends AbstractScopedTestElement implements PostProcessor, Serializable{
private static final Logger log = LoggingManager.getLoggerForClass();
public void process() {
// TODO Auto-generated method stub
JMeterContext context = getThreadContext();
SampleResult previousResult = context.getPreviousResult();
if (previousResult == null) {
return;
}
log.debug("VcodeExtractor processing result");
String status = previousResult.getResponseCode();
int id = context.getThreadNum();
String imageName = id + ".jpg";
if(status.equals("200")){
byte[] buffer = previousResult.getResponseData();
FileOutputStream out = null;
File file = null;
try {
file = new File(imageName);
out = new FileOutputStream(file);
out.write(buffer);
out.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if(out != null){
try {
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
try {
String vcode = new OCR().recognizeText(file, "jpg");
vcode = vcode.replace(" ", "").trim();
JMeterVariables var = context.getVariables();
var.put("vcode", vcode);
var.put("vuser", String.valueOf(id));
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
VcodeExtractorGUI.java
import org.apache.jmeter.processor.gui.AbstractPostProcessorGui;
import org.apache.jmeter.testelement.TestElement;
public class VcodeExtractorGUI extends AbstractPostProcessorGui{
public TestElement createTestElement() {
// TODO Auto-generated method stub
VcodeExtractor extractor = new VcodeExtractor();
modifyTestElement(extractor);
return extractor;
}
public String getLabelResource() {
// TODO Auto-generated method stub
return this.getClass().getName();
}
@Override
public String getStaticLabel() {//設(shè)置顯示名稱
// TODO Auto-generated method stub
return "VcodeExtractor";
}
public void modifyTestElement(TestElement extractor) {
// TODO Auto-generated method stub
super.configureTestElement(extractor);
}
}
以上前兩個(gè)類是圖像識(shí)別,后兩個(gè)是Jmeter的UI部分炼列。
四只搁、咱們可以寫(xiě)一個(gè)測(cè)試類,看一下執(zhí)行結(jié)果是否正確俭尖,測(cè)試類源碼如下
ReadPicture.java
import java.io.File;
import java.io.IOException;
public abstract class ReadPicture {
public static void main(String[] args) throws IOException {
File imageFile = new File("D://123.png");
System.out.println(imageFile.getAbsolutePath());
OCR ocr = new OCR();
String recognizeText = ocr.recognizeText(imageFile, "png");
System.out.println(recognizeText);
}
}
執(zhí)行測(cè)試類氢惋,結(jié)果如下圖
五、生成插件
生成插件稽犁,直接在項(xiàng)目右鍵-> export->Runnable jar file,生成.jar文件焰望。然后將生成的jar文件放在Jmeter的lib文件下的ext文件夾下。然后打開(kāi)Jmeter已亥,在后置處理器下會(huì)有驗(yàn)證碼識(shí)別的插件熊赖。