In requests with dataType: "json" or dataType: "jsonp", if the string contains a double question mark (??) anywhere in the URL or a single question mark (?) in the query string, it is replaced with a value generated by jQuery that is unique for each copy of the library on the page (e.g. jQuery21406515378922229067_1479880736745).
If the request is successful, the status code functions take the same parameters as the success callback; if it results in an error (including 3xx redirect), they take the same parameters as the error callback.
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In jQuery 1.5, the withCredentials property was not propagated to the native XHR and thus CORS requests requiring it would ignore this flag. For this reason, we recommend using jQuery 1.5.1+ should you require the use of it.
The jQuery XMLHttpRequest (jqXHR) object returned by $.ajax() as of jQuery 1.5 is a superset of the browser's native XMLHttpRequest object. For example, it contains responseText and responseXML properties, as well as a getResponseHeader() method. When the transport mechanism is something other than XMLHttpRequest (for example, a script tag for a JSONP request) the jqXHR object simulates native XHR functionality where possible.
The jqXHR objects returned by $.ajax() as of jQuery 1.5 implement the Promise interface, giving them all the properties, methods, and behavior of a Promise (see Deferred object for more information). These methods take one or more function arguments that are called when the $.ajax() request terminates. This allows you to assign multiple callbacks on a single request, and even to assign callbacks after the request may have completed. (If the request is already complete, the callback is fired immediately.) Available Promise methods of the jqXHR object include:
In response to a successful request, the function's arguments are the same as those of .done(): data, textStatus, and the jqXHR object. For failed requests the arguments are the same as those of .fail(): the jqXHR object, textStatus, and errorThrown. Refer to deferred.always() for implementation details.
Different types of response to $.ajax() call are subjected to different kinds of pre-processing before being passed to the success handler. The type of pre-processing depends by default upon the Content-Type of the response, but can be set explicitly using the dataType option. If the dataType option is provided, the Content-Type header of the response will be disregarded.
If xml is specified, the response is parsed using jQuery.parseXML before being passed, as an XMLDocument, to the success handler. The XML document is made available through the responseXML property of the jqXHR object.
If json is specified, the response is parsed using jQuery.parseJSON before being passed, as an object, to the success handler. The parsed JSON object is made available through the responseJSON property of the jqXHR object.
If jsonp is specified, $.ajax() will automatically append a query string parameter of (by default) callback=? to the URL. The jsonp and jsonpCallback properties of the settings passed to $.ajax() can be used to specify, respectively, the name of the query string parameter and the name of the JSONP callback function. The server should return valid JavaScript that passes the JSON response into the callback function. $.ajax() will execute the returned JavaScript, calling the JSONP callback function, before passing the JSON object contained in the response to the $.ajax() success handler.
By default, Ajax requests are sent using the GET HTTP method. If the POST method is required, the method can be specified by setting a value for the type option. This option affects how the contents of the data option are sent to the server. POST data will always be transmitted to the server using UTF-8 charset, per the W3C XMLHTTPRequest standard.
The data option can contain either a query string of the form key1=value1&key2=value2, or an object of the form {key1: 'value1', key2: 'value2'}. If the latter form is used, the data is converted into a query string using jQuery.param() before it is sent. This processing can be circumvented by setting processData to false. The processing might be undesirable if you wish to send an XML object to the server; in this case, change the contentType option from application/x-www-form-urlencoded to a more appropriate MIME type.
The global option prevents handlers registered for the ajaxSend, ajaxError, and similar events from firing when this request would trigger them. This can be useful to, for example, suppress a loading indicator that was implemented with an ajaxSend handler if the requests are frequent and brief. With cross-domain script and JSONP requests, the global option is automatically set to false. See the descriptions of these methods below for more details.
Ajax requests are time-limited, so errors can be caught and handled to provide a better user experience. Request timeouts are usually either left at their default or set as a global default using $.ajaxSetup() rather than being overridden for specific requests with the timeout option.
By default, requests are always issued, but the browser may serve results out of its cache. To disallow use of the cached results, set cache to false. To cause the request to report failure if the asset has not been modified since the last request, set ifModified to true.
The scriptCharset allows the character set to be explicitly specified for requests that use a tag (that is, a type of script or jsonp). This is useful if the script and host page have differing character sets.
The first letter in Ajax stands for "asynchronous," meaning that the operation occurs in parallel and the order of completion is not guaranteed. The async option to $.ajax() defaults to true, indicating that code execution can continue after the request is made. Setting this option to false (and thus making the call no longer asynchronous) is strongly discouraged, as it can cause the browser to become unresponsive.
The $.ajax() function returns the XMLHttpRequest object that it creates. Normally jQuery handles the creation of this object internally, but a custom function for manufacturing one can be specified using the xhr option. The returned object can generally be discarded, but does provide a lower-level interface for observing and manipulating the request. In particular, calling .abort() on the object will halt the request before it completes.
$.ajax() converters support mapping data types to other data types. If, however, you want to map a custom data type to a known type (e.g json), you must add a correspondence between the response Content-Type and the actual data type using the contents option:
I have a service catalog item (accessed via service portal) for users to generate a QR code. It uses an onsubmit client script to call glide ajax. The ajax triggers a rest message to an external provider which generates the QR, and then takes the response back and gives it to the user. At the moment, i just pass the response back to the client script, which is the url to the qr image, and open it in a new tab. However it would be good if i could also take that response and pass it into a workflow associated with the catalog item. That way i can email the image url to the user in case they have some kind of issue with the new tab being opened, or lose the image or some other situation where they need to know it again in the future.
Initially I thought maybe if i have a hidden variable, and in the client script i take the response and populate the variable for use in the workflow. However, because i'm using the portal - i cant use getXMLwait to wait for the ajax to finish, so the variable is not able to be populated with anything.
I might be able to call the workflow directly from the ajax i guess, but in an ideal world it would probably be better to have the WF associated with the request so i can add the URL to the comments etc. for further reference.
I am binding a click action from HTL in a script which does an ajax call to a third party server, and it returns a JSON response. I need to call this script from HTL and use JSON to frame the HTML. Can anybody please help in this?
I don't think that this is specific to AEM or HTL, as long as you create the correct markup and provide the correct Javascript on the frontend to execute that backend request and consume the JSON in the browser. (I am not a frontend developer so I cannot provide you further links here, sorry.)
We can have a js servlet call on click to fetch the json. In the use api js "use function" we can use the response from servlet call, set the return object to the json. "text in this example. In htl we can print whatever is required
Normal policy blocking and login response behavior could interfere with applications that use AJAX. If you want to display a message or redirect traffic without interfering with the user experience while browsing to an AJAX-featured web application, you need to enable AJAX blocking behavior (JavaScript injection). You can implement blocking and login response behavior for applications that use AJAX with JSON or XML for data transfer.
By default, if you enable AJAX blocking behavior, when an AJAX request results in a violation that is set to Block, Application Security Manager performs the default AJAX response page action. The system presents a login response if the application user sends an AJAX request that attempts to directly access a URL that should only be accessed after logging in.
Ajax is commonly used in Web applications where small tidbits of information are retrieved or saved without needing to reload an entire page. Take for example saving a comment on a message board. Ajax is also used on auto-complete boxes and text hints, where you can type the first letters and the system would try to guess what you are typing and suggest words or phrases for you.
Asynchronous methods cannot easily return its value, unlike traditional methods. This is because the results are computed asynchronously or in such a way that one operation begins only when the previous operation has been completed, so the method might have returned before the result is calculated. 152ee80cbc
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