https://github.com/gg2001/monero/blob/master/monero/NewWallet.js
I have a js file that is quite large 6000 lines and JavaScript core does not seem to be able to retrieve variable values whereas running the same file in any web browser works fine for me. When I try to retrieve the value of a variable it shows up as undefined, but when I use a js console in a browswer it shows up fine. I am speculating that this is due to the size of the file because when I put
var helloWorld = "Hello World";
in the front of the js file this swift code can retrieve it
func helloWorld() {
if let variableHelloWorld = self.jsContext.objectForKeyedSubscript("helloWorld") {
print(variableHelloWorld.toString())
}
}
but when I put it at the end it cannot.
Normally this indicates a parsing error. Try adding an error handler to self.jsContext before calling objectForKeyedSubscript() and see if it outputs anything insightful.
self.jsContext.exceptionHandler = { context, exception in
print("JS Error: \(exception?.description ?? "unknown error")")
}
Although your JS code may be valid in a browser console, iOS Safari doesn't support as many Javascript features as newer browsers.
I did see a line in your JS source code beginning with just a semicolon (followed immediately by (function). I wonder if the parser might complain about an empty line without a statement..? Maybe nothing, though.
Related
I'm crawling website secured with Cloudflare and sometimes getting an error due to redirection to page with ReCapcha, the page cannot be even loaded due to some javascript error. The code is failing on #getPage method and i have no idea why.
Here is the code works fine for normal pages, but fails on confirmation page:
final WebClient webClient = new WebClient(BrowserVersion.CHROME);
webClient.getOptions().setJavaScriptEnabled(true);
final HtmlPage page = webClient.getPage("https://mydummy.site");
webClient.waitForBackgroundJavaScript(10000);
int waitForBackgroundJavaScript = webClient.waitForBackgroundJavaScript(200);
int loopCount = 0;
while (waitForBackgroundJavaScript > 0 && loopCount < 2) {
++loopCount;
waitForBackgroundJavaScript = webClient.waitForBackgroundJavaScript(200);
if (waitForBackgroundJavaScript == 0) {
break;
}
}
Logs:
java.lang.RuntimeException: com.gargoylesoftware.htmlunit.ScriptException: Wrapped com.gargoylesoftware.htmlunit.ScriptException: Wrapped com.gargoylesoftware.htmlunit.ScriptException: TypeError: Cannot find function start in object [object MessagePort]. (https://www.gstatic.com/recaptcha/api2/v1536705955372/recaptcha__en.js#249) (https://www.gstatic.com/recaptcha/api2/v1536705955372/recaptcha__en.js#253)
at com.gargoylesoftware.htmlunit.html.HtmlPage.initialize(HtmlPage.java:305)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:539)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:399)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:316)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:467)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:449)
at Main.htmlUnit(Main.java:156)
at Main.main(Main.java:43)
Caused by: com.gargoylesoftware.htmlunit.ScriptException: Wrapped com.gargoylesoftware.htmlunit.ScriptException: Wrapped com.gargoylesoftware.htmlunit.ScriptException: TypeError: Cannot find function start in object [object MessagePort]. (https://www.gstatic.com/recaptcha/api2/v1536705955372/recaptcha__en.js#249) (https://www.gstatic.com/recaptcha/api2/v1536705955372/recaptcha__en.js#253)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:892)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:616)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:532)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:772)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:748)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:104)
at com.gargoylesoftware.htmlunit.html.HtmlPage.loadExternalJavaScriptFile(HtmlPage.java:992)
at com.gargoylesoftware.htmlunit.html.HtmlScript.executeScriptIfNeeded(HtmlScript.java:371)
at com.gargoylesoftware.htmlunit.html.HtmlScript$2.execute(HtmlScript.java:246)
at com.gargoylesoftware.htmlunit.html.HtmlPage.initialize(HtmlPage.java:298)
We have been struggling with this issue as well. Our test suite ran perfectly until late 2018 when this issue broke all of our logins. I believe Google has put this in deliberately to break automated attempts to break captchas, because solving one part of this seems to only lead to another problem. Both loading the page and submitting the page causes issues, even if you tell HtmlUnitDriver to ignore all JavaScript errors.
I have tried several options at this point. If you use the Google specified test site key, then the errors go away. So if you have full server-side control of how that site key is generated, you are OK. Remember to ensure that the test site key shows up again on validation errors and all similar use cases, otherwise you will get that error.
(Unfortunately for us, our login page is plain JSP and so implementing this is a headache unless we want to change the URL everywhere. Still debating what to do, for right now we do have a workable if ugly solution that involves some conditional logic on the page and catching JavaScript exceptions at other points in the test code.)
I run test scripts using Selenium JUnit in Eclipse. Now when I add the following JS code into my Java file, test case stops with error "selenium.JavascriptException: TypeError: document.querySelector(...) is null"
Script works fine in FireFox console.
I'm new in JavaScript and I would be grateful if anyone can help me with this issue.
if (driver instanceof JavascriptExecutor) {
((JavascriptExecutor)driver).executeScript(""
+ "some other code that works fine"
+ "var rtxt= document.querySelector('#CSS__RichHtmlField_displayContent');"
+ "rtxt.textContent= '​JavaScript testScript to testCase';");
} else {
throw new IllegalStateException("This driver does not support JavaScript!");
}
It could be that Firefox waits for the page and information to load before running the script and checking a value. In a Java implementation I think you need to wait before checking values, otherwise you get errors for that things don't exist / haven't loaded yet.
http://www.seleniumhq.org/docs/04_webdriver_advanced.jsp
In my MasterPage i'm using the following script
<script type="text/javascript" src="http://serverapi.arcgisonline.com/jsapi/arcgis/?v=3.3"></script>
And in my application, i have this peace of JavaScript code
document.getElementById(menu_number).src = "<%=HttpContext.Current.Request.ApplicationPath%>/UI/Common/Images/down-arrow.gif";
I also have the Application_AcquireRequestState method below
public void Application_AcquireRequestState(object sender, EventArgs e)
{
// Get http context from the caller.
HttpApplication application = (HttpApplication)sender;
HttpContext context = application.Context;
// Check for encrypted query string
string encryptedQueryString = context.Request.QueryString["request"];
try
{
if (!string.IsNullOrEmpty(encryptedQueryString))
{
// Decrypt query strings
string cryptoKey = System.Web.HttpContext.Current.Session["CryptoKey" + System.Web.HttpContext.Current.Session["UNIQUEKEY"]] == null ? HttpContext.Current.Application["CryptoKey"].ToString() : System.Web.HttpContext.Current.Session["CryptoKey" + System.Web.HttpContext.Current.Session["UNIQUEKEY"]].ToString();
string decryptedQueryString = CryptoQueryStringHandler.DecryptQueryStrings(encryptedQueryString, cryptoKey);
context.Server.Transfer(context.Request.AppRelativeCurrentExecutionFilePath + "?" + decryptedQueryString);
}
}
catch (Exception ex)
{
}
}
When document.getElementById(menu_number).src = "<%=HttpContext.Current.Request.ApplicationPath%>/UI/Common/Images/down-arrow.gif"; is being executed, it throws the below error in IE 11.
JavaScript runtime error: irrationalPath
It also throws an exception in method "Application_AcquireRequestState" but i'm not able to get the exception details. When i put a try -- catch in the method "Application_AcquireRequestState", the exception inner message being returned is
Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.
I'm finding it hard to debug this. The above line of JavaScript executes successfully on the initial page load but throws that error when i'm clicking particular hyperlinks after page load.
What could be the most likely causes of JavaScript error: irrationalPath?
And what does "Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack." actually mean?
Any suggestions on how i can effectively troubleshot this?
I have already seen observed that the IrrationalPath exception is defined in the javascript file at http://serverapi.arcgisonline.com/jsapi/arcgis/?v=3.3
The most likely cause of the JavaScript error: irrationalPath error probably has nothing to do with any of the code you posted in the question. It's a dojo error that is usually seen when there's a problem with the dojo loader. It probably has something to do with the paths or pacakges setup in dojoConfig. See here for more info.
The other error you are getting is a .NET error. I can't be certain without seeing more of your code but this Microsoft support article is a good starting place for troubleshooting that erroor
Have you tried to make the HttpContext.Current.Request.ApplicationPath as String in your js code (delimited with two quotes).
js code become :
document.getElementById(menu_number).src = <%="'"+HttpContext.Current.Request.ApplicationPath+"'"%>+"/UI/Common/Images/down-arrow.gif";
I have a JavaScript error in my web project, and this error appears only in Safari 5 web browser. And the problem is Safari says just error message, but not file and line where this error appears. So, I can't find which code cause this error. Does anybody know how can I find code line causes this error?
Here is shot with debugger.
http://xmages.net/storage/10/1/0/d/c/upload/691ce801.png
Thanks for helping.
Click on the "stop sign" icon until it turns blue and then rerun the code. This should make the debugger halt on the line that generated the exception (and allow you to inspect the local variables and execution stack at that point).
thanks for helping!
Problem resolved now. It was jQuery template plugin. It causes this error when some DOM element in template has ID same as template variable name.
E. G.
var template = "<div id="foo">${foo}</div>"
var data = {foo: "bar"}
$.tmpl(template, data)
Solution: Rename ID of template variable name.
var template = "<div id="foo">${bar}</div>"
var data = {bar: "bar"}
$.tmpl(template, data)
I upgraded from jQuery 1.4.2 to 1.6.2 and now I get error(in IE). I have JavaScript on the page that gets executed by jQuery globalEval() function
// Evaluates a script in a global context
// Workarounds based on findings by Jim Driscoll
// http://weblogs.java.net/blog/driscoll/archive/2009/09/08/eval-javascript-global-context
globalEval: function( data ) {
if ( data && rnotwhite.test( data ) ) {
// We use execScript on Internet Explorer
// We use an anonymous function so that context is window
// rather than jQuery in Firefox
( window.execScript || function( data ) {
window[ "eval" ].call( window, data );
} )( data );
}
},
In IE the call throws exception:
"Error: Could not complete the operation due to error 80020101."
The data parameter that get executed is javascript variables on page surrounded by <!-- -->
<!--
var id = \"ctrl90900\";
var url = \"myur.com/blah.html\";
-->
I'm using IE9, and jQuery 1.6.2 Not sure why this would cause an error.
If there is any error at all in a script passed to execScript, as far is Internet Explorer is concerned, it will report a 80020101 instead of the original error.
So, also check for missing semicolons and JS features not supported by IE.
For short code passages, i found the most effective debugging technique was to comment out parts of code and see if the error still turns up. If it doesn't, examine the code block that was just commented out for above errors.
It might be the commenting of the code, which is invalid JavaScript and unnecessary in this day and age.
You can strip it out with this regex...
$.globalEval(str.replace(/<!--\s*([\s\S]*?)\s*-->/, '$1'));
jsFiddle.
Just wanted to add a bit to this -- I was getting an error 80020101 whenever in an AJAX-called PHP script that included JavaScript. The script inside the PHP file was also breaking somehow, and refusing to render any of the script in the designated div (other elements of the PHP came through, but nothing inside the JavaScript -- I was trying to draw a chart using HighChart).
Turns out there was an undefined PHP function inside the JavaScript in the included PHP file (used to echo some text). I found this using Firebug.
So bottom line, make sure you don't have any undefined functions inside code coming back via AJAX.