Error Handling With Jquery Post
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programmers, just like you, helping each other. Join them; it only takes a minute: Sign up error handling with .post() up vote 30 down vote favorite 9 I have to modify a project written by someone
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else. Because the code is a mess I can't really change this $.post() (or replace it by $.ajax()). What I need to do, is to know if the post returns something else then JSON and return it. $.post('balbal.html', json, function(data) { ... my coude ... }, 'json') I can see the post response in the console.log. Is there a simple way to retrieve it? jquery share|improve this question edited Aug 11 '14 at 9:08 jquery post form asked Apr 23 '10 at 10:13 meo 15.2k1567111 add a comment| 3 Answers 3 active oldest votes up vote 9 down vote accepted There's a couple of ways to do it, but if you're not getting the error response available through the returned JSON data object, you can use $.ajaxSetup() to define defaults for all ajax calls through jQuery. Even though the $.post() method doesn't specify an error handler or callback in and of itself, the $.ajaxSetup() method will capture any ajax faults and execute the function you define for it. Alternatively, there is also an $.ajaxError() function that will do the same sort of thing. Note that this will not work if your JSON response is returned correctly but with a server-side error code. If you want to capture these sorts of cases, you might be best to look for them using the $.ajaxComplete() method share|improve this answer answered Apr 23 '10 at 10:24 Phil.Wheeler 11.8k870136 it worked with by setting the default error function with $.ajaxSetup()... –meo Apr 23 '10 at 10:32 add a comment| up vote 72 down vote Define the error callback immediately after the post. Note the semi-colon placement only at the end. $.post('balbal.html', json, function(data) { // ... my code ... }) .fail(function(response) { alert('Error: ' + response.responseText); }); http:
Team Conduct Brand Guide Donate jQuery API Documentation Download API Documentation Blog Plugins Browser Support search Search jQuery API Documentation jQuery.post() Categories: Ajax > Shorthand Methods jQuery.post( url [, data ] [, success ] [, dataType ] )Returns: jqXHR Description: javascript error handling Load data from the server using a HTTP POST request. version added: 1.0jQuery.post( url [, jquery post fail parameters data ] [, success ] [, dataType ] ) url Type: String A string containing the URL to which the request is jquery ajax post json sent. data Type: PlainObject or String A plain object or string that is sent to the server with the request. success Type: Function( PlainObject data, String textStatus, jqXHR jqXHR ) A callback function that is executed http://stackoverflow.com/questions/2697719/error-handling-with-post if the request succeeds. Required if dataType is provided, but can be null in that case. dataType Type: String The type of data expected from the server. Default: Intelligent Guess (xml, json, script, text, html). version added: 1.12/2.2jQuery.post( [settings ] ) settings Type: PlainObject A set of key/value pairs that configure the Ajax request. All properties except for url are optional. A default can be set for any option with $.ajaxSetup(). See jQuery.ajax( settings https://api.jquery.com/jquery.post/ ) for a complete list of all settings. Type will automatically be set to POST. This is a shorthand Ajax function, which is equivalent to: 1 2 3 4 5 6 7 $.ajax({ type: "POST", url: url, data: data, success: success, dataType: dataType}); The success callback function is passed the returned data, which will be an XML root element or a text string depending on the MIME type of the response. It is also passed the text status of the response. As of jQuery 1.5, the success callback function is also passed a "jqXHR" object (in jQuery 1.4, it was passed the XMLHttpRequest object). Most implementations will specify a success handler: 1 2 3 $.post( "ajax/test.html", function( data ) { $( ".result" ).html( data );}); This example fetches the requested HTML snippet and inserts it on the page. Pages fetched with POST are never cached, so the cache and ifModified options in jQuery.ajaxSetup() have no effect on these requests. The jqXHR Object As of jQuery 1.5, all of jQuery's Ajax methods return a superset of the XMLHTTPRequest object. This jQuery XHR object, or "jqXHR," returned by $.get() implements the Promise interface, giving it all the properties, methods, and behavior of a Promise (see Deferred object for more information). The jqXHR.done() (for success), jqXHR
StudiesData SheetseBooksInfographicsNewsOn Demand WebinarsVideosWhite PapersBlogsAbout UsCompany OverviewBoard of DirectorsLeadership TeamPress ReleasesClientsJoin Our TeamContact Us Sales ManagementCRMMarketing TechnologiesBIEnterprise Content ManagementCustomer ServiceMarketing ManagementCRMMarketing TechnologiesBIEnterprise Content ManagementApplication Development.NETApexIT Project ManagementBusiness ManagementTim Fargo’s BlogHuman ResourcesJob Seekers AJAX Error http://www.toplinestrategies.com/blogs/application-development/ajax-error-handling-jquery Handling with JQuery editor | October 1, 2015 Application DevelopmentI was recently working on a website that was heavily reliant on AJAX requests. JQuery has a lot of methods to define and process AJAX requests in a convenient fashion, but I noticed that one feature JQuery offers is often overlooked by error handling developers, even though it was added back in version 1.0. We are going to discuss the ajaxError() method that can serve as a centralized place for AJAX request error processing. In general, unexpected server responses are handled in similar fashion as on a web page, such as a notification or a modal error handling with dialog appearing to tell the user that something unexpected happened and the operation has failed. By looking at the JQuery documentation for the AJAX convenience methods, like $.post and $.get, we notice that we can attach callback methods to successful and failed AJAX calls. $.post(“/api/sendStuff”, function(){ //... handle success }).fail(function(){ //... handle failure and display notification});Having a way to handle errors on individual AJAX calls is a great way to fine tune your JavaScript and deal with specific error scenarios close to their occurrences. However, being aware of a centralized AJAX error handling routine could avoid scenarios similar to this:$.post(“/api/operationA”, function(){ //...}).fail(function(jqXHR, textStatus, error){ handleError(error);});$.post(“/api/operationB”, function(){ //...}).fail(function(jqXHR, textStatus, error){ handleError(error);});$.post(“/api/operationC”, function(){ //...}).fail(function(jqXHR, textStatus, error){ handleError(error);});...In this scenario, the developer created a sophisticated dynamic single page application driven by a collection of AJAX requests and wrote a method that processes errors thrown by those AJAX requests. Technically, there isn’t anything wrong with this solution. However,