Getjson Ajax 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 Us Learn more about Stack Overflow the company Business Learn more about getjson error handling hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask getjson parsererror Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join getjson fails them; it only takes a minute: Sign up jQuery: handle errors in getJSON()? up vote 13 down vote favorite How do I handle 500 errors when using jQuery's getJSON? There have been a couple of questions about error handling
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with getJSON() and JSONP, but I'm not working with JSONP, just ordinary JSON. Another answer suggests using .ajaxSetup() before calling getJSON(), so I tried this: $.ajaxSetup({ "error":function() { alert('Error!'); }}); $.getJSON('/book_results/', function(data) { # etc But I find that the alert always triggers, even when the result is well-formed. Any ideas? jquery json error-handling share|improve this question edited Jun 26 '15 at 17:16 Sumurai8 10.3k62352 asked Mar 22 '11 at 9:12 AP257 17.5k53147229 1 Can you show jquery ajax json example an example of whats being returned and triggering the alert? –Matt Mar 22 '11 at 9:17 1 it fires the "error" function because it didnt exist and you just made one :) –Bob Kruithof Mar 22 '11 at 9:38 @Bob - thanks - what's creating the error? :) –AP257 Mar 22 '11 at 18:09 In this case, you were creating a function called error. But what the real error is, I don't know because i don't have your files :) Thx for the mark, hope you'll find your error! –Bob Kruithof Mar 22 '11 at 19:06 add a comment| 4 Answers 4 active oldest votes up vote 17 down vote accepted The getJSON method does not natively return errors but you could dive into the xhr object that is returned as a parameter in the callback. The getJSON method is a shorthand function for jQuery.ajax. Using jQuery.ajax you can easily achieve error handling: $.ajax({ url: 'http://127.0.0.1/path/application.json', dataType: 'json', success: function( data ) { alert( "SUCCESS: " + data ); }, error: function( data ) { alert( "ERROR: " + data ); } }); share|improve this answer edited Dec 18 '15 at 11:30 answered Mar 22 '11 at 9:32 Bob Kruithof 2,2241535 add a comment| up vote 9 down vote If you are using the jquery version 1.5 or higher you can use the new methods .success(function), .error(function) and .complete(functio
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programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Why does $.getJSON silently fail? up vote 37 down vote favorite 12 It seems very inconvenient that jQuery's $.getJSON silently fails http://stackoverflow.com/questions/5388934/jquery-handle-errors-in-getjson when the data returned is not valid JSON. Why was this implemented with silent failure? What is the easiest way to perform getJSON with better failure behavior (e.g. throw an exception, console.log(), or whatever)? jquery json error-handling silent share|improve this question asked Mar 30 '11 at 21:44 Dan Burton 32.7k1488165 5 While adequate answers were provided for my problem, I'm still baffled that the devs would program silent failure into $.getJSON...wtf jQuery http://stackoverflow.com/questions/5492838/why-does-getjson-silently-fail guys? –Dan Burton Mar 30 '11 at 23:26 add a comment| 5 Answers 5 active oldest votes up vote 68 down vote accepted you can use function name() { $.getJSON("", function(d) { alert("success"); }).done(function(d) { alert("done"); }).fail(function(d) { alert("error"); }).always(function(d) { alert("complete"); }); } If you want to see the cause of the error, use the full version function name() { $.getJSON("", function(d) { alert("success"); }).fail( function(d, textStatus, error) { console.error("getJSON failed, status: " + textStatus + ", error: "+error) }); } If your JSON is not well-formed, you will see something like getJSON failed, status: parsererror, error: SyntaxError: JSON Parse error: Unrecognized token '/' If the URL is wrong, you will see something like getJSON failed, status: error, error: Not Found If you are trying to get JSON from another domain, violating the Same-origin policy, this approach returns an empty message. Note that you can work around the Same-origin policy by using JSONP (which has it's limitations) or the preferred method of Cross-origin Resource Sharing (CORS). share|improve this answer edited Sep 12 at 15:25 Community♦ 11 answered Apr 27 '12 at 14:01 Mr Shoubs 4,04784886 3 This should be the current accepted answer –Juan Cortés Nov 21 '12 at 12:44 3 Note that .error is deprecated - best to use .fail instead: api.jquery.com/jQuery.ajax –micapam Apr 1
Web Dev @ Microsoft SEO By WooRank Books Courses Screencasts Newsletters Versioning Shop Forums Advertise Contribute Contact Us Our Story 995kSubscribers 132kFollowers 80kFollowers JavaScript Article Ajax/jQuery.getJSON Simple Example By Florian Rappl February 18, 2016 https://www.sitepoint.com/ajaxjquery-getjson-simple-example/ In this article we'll investigate the importance of JSON and why we should use it in our applications. We'll see that jQuery has got us covered with a very nice convenience function. What is JSON? More from this http://nurelm.com/self-indulgent-code-jquery-getjson-with-error-handling/ author Hands-on Functional Programming with Ramda.jsIntroduction to Functional Reactive Programming with RxJS JSON stands for JavaScript Object Notation. In simple terms JSON is a way of formatting data for, e.g., transmitting it over a network. In this article we error handling will look at loading JSON data using an HTTP GET request (we can also use other verbs, such as POST). Why would we choose JSON over say XML? The key advantage of using JSON is efficiency. JSON is less verbose and cluttered, resulting in fewer bytes and a faster parse process. This allows us to process more messages sent as JSON than as XML. Moreover, JSON has a very efficient and natural object representation leading to formats such json error handling as BSON, where JSON-like objects are stored in a binary format. Now let's see how jQuery can help us load JSON-encoded data from a remote source. For the impatient among you, there's a demo towards the end of the article. JSON jQuery Syntax The $.getJSON() method is a handy helper for working with JSON directly if you don't require much extra configuration. Essentially, it boils down to the more general $.ajax() helper, with the right options being used implicitly. The method signature is: $.getJSON(url, data, success); Besides the required URL parameter we can pass in two optional parameters. One represents the data to send to the server, the other one a callback to trigger in case of a successful response. So the three parameters correspond to: The url parameter is a string containing the URL to which the request is sent. The optional data parameter is either an object or a string that is sent to the server with the request. The optional success(data, textStatus, jqXHR) parameter is a callback function executed only if the request succeeds. In the simplest scenario we only care about the returned object. In this case, a potential success callback would look like this: function success(data) { // do something with data, which is an object } As mentioned, the same request can be triggered with the more verbose $.ajax() call. Here we would use: $.aj
some back-end code. In general most of these requests originate and terminate within the same domain. The problem is that some of these requests occur outside the local domain and I don't have direct control of their availability. Additionally jQuery's getJSON for some reason doesn't include access to the error callback. The funny thing is getJSON is built off of jQuery's ajax which wraps JavaScripts XMLHttpRequest object and includes an event for complete and error status of the request. For some reason though these items were left off the getJSON function. So now you are saying to yourself, "boy this guy is picky", but in reality JSON is one of the few things that can be transfered across domains with AJAX. So here is my solution. It is a general wrapper for the jQuery ajax object. In the code below I have created a replacement to getJSON with one caveat aside from the fact it includes a way to pass a callback for handling errors. The AjaxWrapper class can be used to create custom jQuery AJAX commands. AjaxGet takes 4 parameters: The first two are required and the last two are the success and error callbacks. If you don't pass a function to either one of these parameters there is a default callback that will take its place.
/** * Asynchronous get with data that has backup default success and error functions * which utilize Alert.js to return the status of the JSON request. These functions * can be overridden for custom actions * @author Paul Scarrone(NuRelm) * @param url The URL to process the request against * @param data JSON encoded object which contains the request data * @param successfcn a function which takes data as a parameter * @param errorfcn a function which takes XMLHttpRequest, textStatus, errorThrown as parameters */ function AjaxGet(url, data, successfcn, errorfcn){ var AjaxInstance = new AjaxErrorHandler(); var success; var error; if(typeof(data) == "function"){ if(typeof(successfcn) == "function"){ errorfcn = successfcn; } //Was being