How to know the url of ajax request at any website - javascript

When I use some website, is it possible to get the url of ajax requests, current page sends. By the help of browser or another tool.

Chrome Developer Tools or Firebug will do the trick. Fiddler is another good tool.

Look in the Net tab of the browser's developer tools, or use a logging proxy like Charles.

Related

How can I check if scrips on my site are making any requests?

I mean I know I can check it in chrome dev tools for example but I would like to know how can I do it without browser.
I assume you want to check from your operating system. You can install one of the apps below to check the network requests from your computer.
fiddler
wireshark
See this answer for more info.
The Chrome devtools records network requests by hooking into the Chrome implementation.
You're looking for Chrome's new headless mode, which will run Chrome on a server with no UI and let you control and monitor it directly.

understanding what the end result is for document.submit

Is there a way to find out the destination of the information or track where it goes when form instance information is created from document.submit?
I have to reverse engineer this application that is taking form submissions but I am having difficulty trying to find out where it's going.
If you are using a modern web browser, like Chrome, you can use the network developer tools within to help you.
You can access the Chrome developer tools with the F12 key and also Ctrl+Shift+i and then go to the network tab. network tools example here. There you will be able to click on individual requests and see the request headers and response data, along with any other relevant data.

Developer Tools: Follow network requests across popups

We are trying to figure out how something works on the web (for web scraping/automation) and one of the web pages we are working on issues a popup to do some of the work. One of our most commonly used debug tools is the Chrome network tab in Developer Tools, hit "record" do some work, and then examine what was done and then replicate the work done "offline".
However the Developer Tools (in Chrome, Safari and Firefox - all work the same) do not follow requests across a popup, even if you hit "record".
Is there some configuration value I'm missing, or some way to record all network events? We can't use tcpdump/wireshark for this because it's all done over SSL. One option we've considered is a man-in-the-middle https proxy, but I can't find anything pre-written so we'd have to create one ourselves.
I don't know of any way to follow the requests across pop-ups, as each window has its own Web Inspector, however you can use Fiddler to inspect HTTPS requests. It will MITM, and subsequently throw a certificate error, which should allow you to inspect all requests in the order that they happened.
You can use Charles Web Debugging Proxy, which is an app that lets you see all the traffic and even replace some responses with your own. Of course that may break HTTPS so you have to accept the certificate errors, but that's usually a minor problem. It works on Win, Mac and even Linux.
The object inspector cannot inspect what isn't in the current page. Therefore, you will need to open the inspector inside the popup url with same parameters in order to see what it does.
As a tool, you can use a web sniffer to see exactly which url were called during the process.

Seeing cookies in HTTP requests/responses

I want to debug what cookies (Set-cookie) I am sending as part of an JavaScript XMLHttpRequest and the cookies received in the corresponding response object. Is there any way to do this?. I want to look at the request/response objects directly instead of checking document.cookie or using the JQuery cookie plug-in.
I've tried looking in Chrome web inspector but I've had no luck.
You can see cookie values also in Firebug console in Firefox.
Just install the plugin and press F12 to access it
They'll show up in the Net tab of the Chrome Developer tools.
Try using HTTP Analyzer .
You just start it and access your website and it captures all the requests and responses.
Plus it ain't browser specific captures data from all browser requests and responses.
In ur chrome, press F12 go to resources tab, expand cookies and see data in the cookie. See below cookies from facebook.com

How to view Web socket response in browser?

I am using Google Chrome version 24
I am viewing a website where the data is being fetched to the front end by websocket call.
My question is, "Is it possible to view the web socket response from the browser?" Are there any such tools?
Please let me know, thanks in advance.
Yes this is possible. Look at the Network pane in Dev Tools and look for the line that says Switching Protocols
The caveat is you need to close and reload the detail pane as it does not auto-refresh (as of Chrome 25)
Possible duplicate: Debugging WebSocket in Google Chrome (though definitely dated information, much has changed since those answers were posted)
This is pretty close to 'up-to-date' information as of (2013-03-20) http://codetheory.in/websocket-traffic-inspection-in-chrome-developer-tools/
On the Chrome inspector, click the Network tab.
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