Asp Net Javascript Error
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About asp net ajax error Us Learn more about Stack Overflow the company Business Learn more about hiring asp net javascript alert developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the asp net javascript array Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Logging Clientside JavaScript Errors on Server asp net custom errors [closed] up vote 67 down vote favorite 26 Im running a ASP.NET Site where I have problems to find some JavaScript Errors just with manual testing. Is there a possibility to catch all JavaScript Errors on the Clientside and log them on the Server i.e. in the EventLog (via Webservice or something like that)? javascript logging error-handling share|improve this question edited Sep 27 '12 at 17:54
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James McMahon 22.6k51149223 asked Sep 23 '08 at 6:43 MADMap 1,50721625 closed as too broad by Andrew Barber Jul 22 '14 at 15:05 There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question. The problem why we are not using JavaScript UnitTesting is because there are too many people contributing to the Site/Content and they are using JavaScript. The Content is nothing we (as developers) should care about, but there are mistakes in the code. So a general solution would be better. –MADMap Sep 23 '08 at 6:50 I assume you don't mean average user contributed (else that is XSS hole)... but... you could maybe isolate their JS in try/catch so it at least doesn't affect your own JS... without knowing the dynamic of the site, I don't know if this will help or not... –Mike Stone Sep 23 '08 at 7:06 The content is from
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server side errors is the easy part, but what about those browser errors that go unnoticed and unfixed? First, create the Server Side Handler To handle and log JavaScript errors, we'll first need to setup http://joel.net/logging-errors-with-elmah-in-asp.net-mvc-3--part-5--javascript some server side code. The client (browser) will pass these errors to the server, which http://james.newtonking.com/archive/2006/05/02/logging-javascript-errors-to-asp.net will hand them off to ELMAH for tracking. So let's start by creating a new Exception type for our JavaScript exceptions. This will allow us to differentiate the server errors from the JavaScript errors more easily. It doesn't need much so this should be fine... public class JavaScriptException : Exception { public JavaScriptException(string message) : base(message) { } } asp net We are also going to need a Controller to receive the exception and hand it off to ELMAH. public class ErrorController : Controller { public void LogJavaScriptError(string message) { ErrorSignal .FromCurrentContext() .Raise(new JavaScriptException(message)); } } That's it for the server side changes. Next we need to setup the client (browser) to actually handle these errors and pass them onto the controller. JavaScript stack trace First we need to implement a JavaScript Stack Trace. This will asp net js help us get more debugging information and context surrounding the errors. So copy and paste this stacktrace.js file to your project... // FROM: http://helephant.com/2007/05/diy-javascript-stack-trace function logError(ex, stack) { if (ex == null) return; if (logErrorUrl == null) { alert('logErrorUrl must be defined.'); return; } var url = ex.fileName != null ? ex.fileName : document.location; if (stack == null && ex.stack != null) stack = ex.stack; // format output var out = ex.message != null ? ex.name + ": " + ex.message : ex; out += ": at document path '" + url + "'."; if (stack != null) out += "\n at " + stack.join("\n at "); // send error message $.ajax({ type: 'POST', url: logErrorUrl, data: { message: out } }); } Function.prototype.trace = function() { var trace = []; var current = this; while(current) { trace.push(current.signature()); current = current.caller; } return trace; } Function.prototype.signature = function() { var signature = { name: this.getName(), params: [], toString: function() { var params = this.params.length > 0 ? "'" + this.params.join("', '") + "'" : ""; return this.name + "(" + params + ")" } }; if (this.arguments) { for(var x=0; x < this.arguments.length; x++) signature.params.push(this.arguments[x]); } return signature; } Function.prototype.getName = function() { if (this.name) return this.name; var definition = this.toString().split("\n")[0]; var exp = /^function ([^\s(]+).+/; if (exp.test(definition)) return definition.split("\n")[0].replace(exp, "
responsive and user friendly web applications. Unfortunatly this shift does not come without cost.Greater complexity on the client means more room for bugs, and without some effective means to log them you are left in the dark about problems until users are driven to complain.Solution OverviewThe client exception logger comprises of three parts: a script on the client that catches the exceptions and sends them to the server, a HttpHandler on the server that receives the error details and logs them, and an ASP.NET control that links the two together.Details logged include the following: JavaScript exception message, line and file name Date and time IP Address User agent (browser and platform details) Session ID Catching and Sending the Error on the Client Whenever an exception is not caught in JavaScript it triggers an onerror event on the browser's window object. It is comparable to ASP.NET’s Application_Error event in the global.asax.When the page is downloaded a ClientLogger object is created and a function is attached to the onerror event. That function calls a method on ClientLogger object which will send the error details to ASP.NET on the server using the XMLHttpRequest object. This is done asynchronously and does not effect the user. var logger = new ClientLogger({handlerUrl:'../../ClientLogger.axd',sessionID:'2rnbawbkzuovsw55ymvflz45'}); window.onerror = function(message, url, line) { logger.Log(message, url, line); }; Receiving and Logging the Error on the Server When sending the error data back to the server, rather than the page calling back to itself, the logger posts the details a custom HttpHandler. This is done to minimize side effects or performance issues of creating the page again.Note that the handler does not contain any logic for logging the error details. Instead it uses the new ASP.NET 2.0 Web Event feature, and raises a custom WebJavaScriptErrorEvent event. WebBaseEvent.Raise(new WebJavaScriptErrorEvent(jsMessage, this, jsUrl, jsLine, pageUrl, userAgent, sessionID)); Packaging Everything Together in a Control The ASP.NET control includes the JavaScript file (embedded in the dll) on the page and registers some JavaScript that creates the client object and attaches it to the onerror event. To enable JavaScript error logging include the control on your mast