Let's say in a simple windows form there is a Webbrowser control that points to www.google.com. Is there a way to see what other requests were made by the webbrowser (eg. list of requested images, javascript files, css files and all that stuff)?
Try fiddler2.
What is Fiddler?
Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and
the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and
"fiddle" with incoming or outgoing data. Fiddler includes a powerful event-based scripting
subsystem, and can be extended using any .NET language.
Related
I'm not a network expert, but for one of my projects, I need to ensure that the website I'm sending the request to is alive. Some websites do not respond to ping; basically, their configuration prevents response to ping requests.
I was trying to Arping instead of pinging websites, but Arping only works on the local network and will not go beyond the network segment (this).
I can download the whole or part of the webpage and confirm if the content is the same as the previous state, but I rather have one more level of confirmation before downloading Html.
Is there any other method that enables the app to get a response back from non-pingable websites outside the network?
Based on common practices you may use ping, telnet and tracert as a client to the requested server (at this point the website or the service you want to connect) and make sure the 3 command are enable to your side. You may also try to access it to your browser.
If its API you may also try to use POSTMAN and call the service.
Goodluck and happy coding :)
I have a C# application and I want to capture outgoing http requests that have been made through the application (I can also identify that it was from the app because I have a specific server name).
When searching on the web all I could find was capturing incoming requests (so the code is on the server side) with TcpListener and HttpListener.
But the code must be client side so it must be outgoing requests.
And I cannot use any third party libraries (like FiddlerCore for example).
So I'm really looking for a code sample to start from.
Do you want to store the request or just access it for debugging?
If you are going after debugging, then you can use Fiddler. Fiddler is an HTTP debugging proxy server application. And if you are planning to modify or read data in the request or the response you can use HTTPRequestWrapper and HTTPResponseWrapper to access.
Pretty much straight forward question. I've tried to look this up but the results that I've found have been very vague. I'm busy with a Windows Phone app and have been running into some problems. I've read with Fiddler on you might run into some problems, but that's beside the point right now...
What is fiddler and how do I know if it's 'on'? Plus how to I turn it off if it is?
Thanks in advance,
Fiddler is a data monitoring tool that allows you to see incoming and outgoing HTTP(s) traffic from your computer. http://fiddler2.com/
It is a desktop app, so if you haven't got it installed on your PC - then you don't need to turn it off
Fiddler is a tool that helps you monitor your HTTP(S) traffic. It's great for debugging any network issues you're having as it lets you trace where your data is going and coming in from. If you haven't installed it, then you won't have it on your machine by default.
Monitor HTTP/HTTPs traffic from any browser
Fiddler is a free web debugging proxy which logs all HTTP(s) traffic between your computer and the Internet. Use it to debug traffic from virtually any application that supports a proxy like IE, Chrome, Safari, Firefox, Opera, and more.
Inspect and debug traffic from any client
Debug traffic from PC, Mac, or Linux systems and mobile devices. Ensure the proper cookies, headers, and cache directives are transferred between the client and server. Supports any framework, including .NET, Java, Ruby, etc.
Tamper client requests and server responses
Easily manipulate and edit web sessions. All you need to do is set a breakpoint to pause the processing of the session and permit alteration of the request/response. You can also compose your own HTTP requests to run through Fiddler
Test the performance of your web sites and apps
Fiddler lets you see the “total page weight,” HTTP caching, and compression at a glance. Isolate performance bottlenecks with rules like “Flag any uncompressed responses larger than 25kb.”
Decrypt HTTPS web sessions
Use Fiddler for security testing your web applications -- decrypt HTTPS traffic, and display and modify requests using a man-in-the-middle decryption technique. Configure Fiddler to decrypt all traffic, or only specific sessions.
Extend Fiddler as much as you want
Benefit from a rich extensibility model which ranges from simple FiddlerScript to powerful Extensions which can be developed using any .NET language. See full list of ready-made add-ons.
I wanted to know what is the best way to write an agent on Win platform that will be able to monitor browser's communication.
scenario: monitor the user access to predefined url on Chrome, FireFox and IE. On each hit I send the stats to a server with some data (page title).
The ways I found so far are proxy and browser addons. Each has it's own advantages and disadvantages. The main disadvantage of the proxy way is handling of HTTPS communication. The addon disadvantage is the installation (need to install on every browser) and cross-browser support.
Is there another way? some service I can write with .net that will automatically hook on a browser when it is started?
Thanks you.
You do have only two choices - an http proxy, or to write a plugin for every browser. That plugin could just forward data via network to a central service, leaving you with the challenge of coming up with a common set of data that all browsers can provide, plus learning all the plugin models.
In my opinion, though, the only real option is an HTTP(s) proxy because otherwise you have to keep updating your plugins every time browsers change, or deal with the fact that new browsers can come along and be used.
Certainly you won't find a 'user is browsing a url in some browser' event in the OS - all it knows is that a socket connection has been opened on some local port to a remote server's port 80/443 (or whatever).
So I strongly suggest building on top of the excellent work that's behind Fiddler and use the Fiddler Core.
http://www.telerik.com/fiddler/fiddlercore
For https you have to decrypt and re-encrypt with a different certificate. The information that you need is just not available without actually unpacking the request. Fiddler achieves this by opening it's own SSL tunnel to the target server on the client's behalf, whilst acting as an SSL server to the client under a different certificate. So long as the certificate that it uses is fully trusted by the client, no problems occur.
That said, it means that the user cannot personally verify the identify of the target site - therefore your system would have to assume worst case scenario for any invalid SSL certificates and block the connection.
I'm using the Html Agility Pack and I keep getting this error. "The remote server returned an error: (500) Internal Server Error." on certain pages.
Now I'm not sure what this is, as I can use Firefox to get to these pages without any problems.
I have a feeling the website itself is blocking and not sending a response. Is there a way I can make my HTML agility pack call more like a call that is being called from FireFox?
I've already set a timer in there so it only sends to the website every 20 seconds.
Is there any other method I can use?
Set a User-Agent similar to a regular browser. A User agent is a http header being passed by the http client(browser) to identify itself to the server.
There are a lot of ways servers can detect scraping and its really just an arms race between the scraper and the scrapee(?), depending on how bad one or the other wants to access/protect data. Some of the things to help you go undetected are:
Make sure all http headers sent over are the same as a normal browser, especially the user agent and the url referrer.
Download all images and css scripts like a normal browser would, in the order a browser would.
Make sure any cookies that are set are sent over with each subsequent request
Make sure requests are throttled according to the sites robots.txt
Make sure you aren't following any no-follow links because the server could be setting up a honeypot where they stop serving your ip requests
Get a bunch of proxy servers to vary your ip address
Make sure the site hasn't started sending you captcha's because they think you are a robot.
Again, the list could go on depending on how sophisticated the server setup is.