How to generate HAR file after running a test using Jmeter?

Question

I have created a script in JMeter using Selenium jar and I have written script in WebDriver sample using Java script language .

Script is working fine

//var pkg2 = JavaImporter(net.lightbody.bmp.BrowserMobProxy);

var pkg = JavaImporter(org.openqa.selenium); //WebDriver classes
var support_ui = JavaImporter(org.openqa.selenium.support.ui.WebDriverWait); //WebDriver classes
var wait = new support_ui.WebDriverWait(WDS.browser, 5000);

WDS.sampleResult.sampleStart(); //captures sampler's start time
WDS.sampleResult.getLatency();
WDS.log.info("Sample started");

WDS.browser.get('http://newtours.demoaut.com/mercuryreservation.php'); //opens website specified in 'http://duckduckgo.com'
WDS.log.info("Sample ended - navigated to flight reservation.com");


var btnView = WDS.browser.findElement(pkg.By.xpath("//div[contains(text(),'Mercury')]"))
WDS.browser.executeScript("arguments[0].click();", btnView)

WDS.log.info(btnView.parameters);
WDS.log.info(btnView.size);
var username=WDS.browser.findElement(pkg.By.xpath("//input[@name='userName']"));

username.sendKeys([WDS.parameters]);

var password=WDS.browser.findElement(pkg.By.xpath("//input[@name='password']"));
password.sendKeys(['mypassword']);


var login=WDS.browser.findElement(pkg.By.xpath("//input[@value='Login']"));
login.click();
WDS.sampleResult.sampleEnd();

Now I Would like to generate HAR file(HTTP Water fall) in JMeter.

Can anyone help me on this ?

Answer 1

1. Add JSR223 PreProcessor as a child of your WebDriver Sampler

2. Put the following code into "Script" area

   def proxy = new net.lightbody.bmp.BrowserMobProxyServer()
   proxy.setHarCaptureTypes(net.lightbody.bmp.proxy.CaptureType.getAllContentCaptureTypes())
   proxy.enableHarCaptureTypes(net.lightbody.bmp.proxy.CaptureType.REQUEST_CONTENT, net.lightbody.bmp.proxy.CaptureType.RESPONSE_CONTENT)
   proxy.newHar()
   proxy.start(8888)
   vars.putObject('proxy',proxy)
   

3. Configure your browser to use the BrowserMobProxy for all traffic

   

4. Add JSR223 PostProcessor as a child of the WebDriver Sampler and out the following code into "Script" area:

   def proxy = vars.getObject('proxy')
   
   proxy.getHar().writeTo(new File("/path/to/your/file.har"))
   proxy.stop()
   

You can learn more about Groovy scripting in JMeter via Apache Groovy - Why and How You Should Use It article.

Answer 2

Please share the sample script if you have anything because I tried the above process but unable to generate the HAR file and below is the error message

2019-07-18 11:56:59,920 ERROR o.a.j.t.JMeterThread: Error calling threadStarted org.openqa.selenium.WebDriverException: invalid argument: cannot parse capability: proxy from invalid argument: Specifying 'socksProxy' requires an integer for 'socksVersion'
(Driver info: chromedriver=2.46.628402 (536cd7adbad73a3783fdc2cab92ab2ba7ec361e1),platform=Windows NT 6.1.7601 SP1 x86_64) (WARNING: The server did not provide any stacktrace information) Command duration or timeout: 16 milliseconds Build info: version: '2.52.0', revision: '4c2593cfc3689a7fcd7be52549167e5ccc93ad28', time: '2016-02-11 11:22:43' System info: host: 'PC0CRTUU', ip: '10.115.42.113', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_181' Driver info: org.openqa.selenium.chrome.ChromeDriver at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source) ~[?:?] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_181] at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_181] at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206) ~[selenium-remote-driver-2.52.0.jar:?] at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158) ~[selenium-remote-driver-2.52.0.jar:?] at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678) ~[selenium-remote-driver-2.52.0.jar:?] at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:249) ~[selenium-remote-driver-2.52.0.jar:?] at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:131) ~[selenium-remote-driver-2.52.0.jar:?] at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:144) ~[selenium-remote-driver-2.52.0.jar:?] at org.openqa.selenium.chrome.ChromeDriver.(ChromeDriver.java:170) ~[selenium-chrome-driver-2.52.0.jar:?] at com.googlecode.jmeter.plugins.webdriver.config.ChromeDriverConfig.createBrowser(ChromeDriverConfig.java:74) ~[jmeter-plugins-webdriver-3.0.jar:?] at com.googlecode.jmeter.plugins.webdriver.config.ChromeDriverConfig.createBrowser(ChromeDriverConfig.java:21) ~[jmeter-plugins-webdriver-3.0.jar:?] at com.googlecode.jmeter.plugins.webdriver.config.WebDriverConfig.getPreparedBrowser(WebDriverConfig.java:233) ~[jmeter-plugins-webdriver-3.0.jar:?] at com.googlecode.jmeter.plugins.webdriver.config.WebDriverConfig.threadStarted(WebDriverConfig.java:220) ~[jmeter-plugins-webdriver-3.0.jar:?] at org.apache.jmeter.threads.JMeterThread$ThreadListenerTraverser.addNode(JMeterThread.java:762) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jorphan.collections.HashTree.traverseInto(HashTree.java:994) [jorphan.jar:5.0 r1840935] at org.apache.jorphan.collections.HashTree.traverse(HashTree.java:977) [jorphan.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.threadStarted(JMeterThread.java:730) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.initRun(JMeterThread.java:718) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:249) [ApacheJMeter_core.jar:5.0 r1840935] at java.lang.Thread.run(Unknown Source) [?:1.8.0_181] 2019-07-18 11:56:59,954 ERROR o.a.j.m.JSR223PreProcessor: Problem in JSR223 script, JSR223 PreProcessor javax.script.ScriptException: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: Script5.groovy: 1: unable to resolve class net.lightbody.bmp.BrowserMobProxyServer @ line 1, column 13. def proxy = new net.lightbody.bmp.BrowserMobProxyServer() ^

1 error

at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.compile(GroovyScriptEngineImpl.java:187) ~[groovy-all-2.4.15.jar:2.4.15] at org.apache.jmeter.util.JSR223TestElement.processFileOrScript(JSR223TestElement.java:215) ~[ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.modifiers.JSR223PreProcessor.process(JSR223PreProcessor.java:44) [ApacheJMeter_components.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.runPreProcessors(JMeterThread.java:935) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:537) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:486) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:253) [ApacheJMeter_core.jar:5.0 r1840935] at java.lang.Thread.run(Unknown Source) [?:1.8.0_181] Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: Script5.groovy: 1: unable to resolve class net.lightbody.bmp.BrowserMobProxyServer @ line 1, column 13. def proxy = new net.lightbody.bmp.BrowserMobProxyServer() ^

1 error

at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:981) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:626) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:575) ~[groovy-all-2.4.15.jar:2.4.15] at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:323) ~[groovy-all-2.4.15.jar:2.4.15] at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:293) ~[groovy-all-2.4.15.jar:2.4.15] at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:279) ~[groovy-all-2.4.15.jar:2.4.15] at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:236) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.getScriptClass(GroovyScriptEngineImpl.java:335) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.compile(GroovyScriptEngineImpl.java:185) ~[groovy-all-2.4.15.jar:2.4.15] ... 7 more 2019-07-18 11:56:59,969 ERROR o.a.j.m.JSR223PreProcessor: Problem in JSR223 script, JSR223 PreProcessor javax.script.ScriptException: java.lang.NullPointerException: Cannot invoke method getHar() on null object at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:324) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.jsr223.GroovyCompiledScript.eval(GroovyCompiledScript.java:72) ~[groovy-all-2.4.15.jar:2.4.15] at javax.script.CompiledScript.eval(Unknown Source) ~[?:1.8.0_181] at org.apache.jmeter.util.JSR223TestElement.processFileOrScript(JSR223TestElement.java:221) ~[ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.modifiers.JSR223PreProcessor.process(JSR223PreProcessor.java:44) [ApacheJMeter_components.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.runPreProcessors(JMeterThread.java:935) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:537) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:486) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:253) [ApacheJMeter_core.jar:5.0 r1840935] at java.lang.Thread.run(Unknown Source) [?:1.8.0_181] Caused by: java.lang.NullPointerException: Cannot invoke method getHar() on null object at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:91) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:47) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:34) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) ~[groovy-all-2.4.15.jar:2.4.15] at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120) ~[groovy-all-2.4.15.jar:2.4.15] at Script6.run(Script6.groovy:3) ~[?:?] at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:321) ~[groovy-all-2.4.15.jar:2.4.15] ... 9 more 2019-07-18 11:56:59,970 ERROR o.a.j.t.JMeterThread: Error while processing sampler: 'TC01_Purdy_Homepage'. java.lang.IllegalArgumentException: Browser has not been configured. Please ensure at least 1 WebDriverConfig is created for a ThreadGroup. at com.googlecode.jmeter.plugins.webdriver.sampler.WebDriverSampler.sample(WebDriverSampler.java:62) ~[jmeter-plugins-webdriver-3.0.jar:?] at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:622) ~[ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:546) ~[ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:486) [ApacheJMeter_core.jar:5.0 r1840935] at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:253) [ApacheJMeter_core.jar:5.0 r1840935] at java.lang.Thread.run(Unknown Source) [?:1.8.0_181] 2019-07-18 11:56:59,971 INFO o.a.j.t.JMeterThread: Thread is done: Thread Group 1-1 2019-07-18 11:56:59,971 INFO o.a.j.t.JMeterThread: Thread finished: Thread Group 1-1 2019-07-18 11:56:59,971 INFO o.a.j.e.StandardJMeterEngine: Notifying test listeners of end of test 2019-07-18 11:56:59,971 INFO o.a.j.g.u.JMeterMenuBar: setRunning(false, local)