I want to ask you how the browser sends ajax request i mean what is the format of ajax request. So what is actual format of AJAX request sent by browser.
Thanks in advance
If you install Firefox and Firebug you can see for yourself:
http://codeclimber.net.nz/archive/2007/08/01/How-to-debug-XmlHttpRequest-with-Firebug.aspx
It's a standard HTTP request - just like any other request the browser makes.
You can read more about the XMLHttpRequest call and indeed the structure of a HTTP request on WikiPedia.
AJAX is shorthand for Asynchronous JavaScript and XML and does not define a standard on how the data is transferred.
Because the browsers are designed primarily as HTTP clients you should study GET and POST and maybe PUT and DELETE for RESTful web services.
Related
It's that even possible to handle that kind of request? I can't find a decent explanation.
From a network perspective, an Ajax request is just a regular HTTP request, sometimes with some specific HTTP headers such as X-Requested-With or CORS headers.
Gatling sends HTTP requests (or other protocol), so it really doesn't care that a request is an "Ajax" one.
Then, Gatling is not a browser, so it doesn't run your client-side JavaScript and won't automatically trigger Ajax requests for you. You have to include them explicitly in your scenario.
I am using django and making some ajax request to server. As the url is visible in javascript someone could easily copy that and start making request via url bar. Is there any way in django that we can distinguish that the coming request is sent by ajax not a regular browser reqeust.
You can use a tag in your ajax,and in code check request from
Yes you can use
HttpRequest.is_ajax()
as in documentation
https://docs.djangoproject.com/en/2.2/ref/request-response/#django.http.HttpRequest.is_ajax
Are there any AJAX client tools for interrogating ajax endpoints?
I am using firebug for development and have installed some addons for manipulating the request headers.
However, I am finding this to be quite unproductive as I need to set the X-Requested-With in the header whenever I want to test my AJAX endpoint and then remove it for testing my pages normally.
I am looking for a GUI tool which allows me to point it to an AJAX endpoint and craft a request, be it a JSON request or just a standard GET/POST request.
Something equivalent to Pinta (for testing AMF requests) in the AJAX world would be nice.
Do any tools like this exist?
I just found HttpRequest (a FireFox addon) that can do this. Simply just set the request header x-requested-with to XMLHttpRequest and away you go!
will any webserver [IIS possibly] know whether a request is an AJAX request or a Normal one.
If you are using native XmlHttpRequests then there is no difference between this request and once generated by visiting a page or submitting a form. If you use jQuery to create the AJAX request then is adds a request header X-Requested-With: XMLHttpRequest. This header could be used to distinguish AJAX and non-AJAX requests.
Some (most?) frameworks can send a custom header, but, really, an ajax request is just the same as a "normal" request from the point of view of the server.
If you use curl, wget, telnet, or a program you write yourself, then the web server handles the request the same way - at the end of the day, it's all HTTP.
The easiest way for the receiving page to 'know' would be to send a query string parameter. This isn't 100% safe though.
Firebug can show you what is being sent to the server from both types of requests, try it out.
Possibly, it is not the webserver that can distinguish, but the server side code might be able to distinguish. If you are talking about ASP.NET and AJAX, then ScriptManager.IsInAsyncPostBack can be used to find whether a postback is from AJAX or not.
Is it possible to know that a HTTP request is from Ajax?If yes, how?
Many frameworks add a header X-Requested-With set to XMLHttpRequest when sending an AJAX request. If you are using jQuery or Microsoft frameworks, this should work. If using another framework, you'll have to check the documentation. Since normal requests don't have the header, a check for the presence of the header should be sufficient.
If you are using your own "home-built" AJAX or the framework doesn't do this, but does allow you to set a header, you could simply follow this convention and add your own header when making the request.
Most frameworks set X-Requested-With header to state it. But standard AJAX requests doesn't.
I would assume that any request received by a server would appear to be the same (ie http post/get) and that you would need to look at the referer, but that may just give you the browser details?