I'm writing an application, which becomes "useful" once user is browsing certain url.
I want to add feature to my application, that it will be automatically launched once user browses this url, I was thinking of writing some sort of watchdog to trigger it.
My question is, whether there is a generic way to get notified when user browses to urls, I want to support at least IE and FireFox, chrome and safari is nice to have.
I read about DDE and WWW_RegisterURLEcho, but from what I understand it's not supported by FireFox, and also little sample I wrote didn't work with IE as well.
Thank you in advance
some more questions **
Do Url Monikers and Asynchronous Pluggable Protocols help me here ? Is it supported by FireFox ?
If you have control over the website, you could have it write a cookie to the computer. Then have your application monitor for that cookie.
You can implement this in many ways and at many different layers.
At the highest level, you could implement a browser plugin. There is no cross-browser solution at this layer that will let you write the code once and work for every browser. On the easy end of the spectrum, Firefox, you could implement it entirely as a Javascript + XUL plugin and use built-in XPCom interfaces (nsIProcess) for launching your helper process. For IE you would need to write a COM, C++ and win32 BHO that handles DWebBrowserEvents2::BeforeNavigate2. This is the hardest thing to do. There are mechanisms for Safari, Chrome and other webbrowsers that you could use to achieve this same behavior, with varying degrees of difficulty.
At the next level you could implement an HTTP proxy, similar to Fiddler2, that redirects all HTTP traffic through your local proxy first. Each browser has a different way of configuring its proxy settings, but they're all basically registry settings or config files.
At the most basic level you could just snif all IP traffic going out of the machine, similar to the way Wireshark does it, and just look for http requests to your URL. This is probably more difficult to code, but would work for all browsers without any special per-browser configuration stuff going on. You may need to write a driver. I dunno, I've never done work at this level in the stack.
Related
When I use MS Edge, Firefox or Opera to access Cloudfare-protected webpages, it shows the page correctly. However, using TWebBrowser it always shows the Cloudfare captcha page first.
How do I configure Delphi TWebBrowser to act like a "real" web browser which does not invite the Cloudfare page?
Note that this is occasional access to the page, and yet it triggered the cloudfare when the other browsers do not trigger at that same point in time.
Not an real answer but some things i encountered with TWebBrowser on the "real" Internet.
The Sites i encountered needed different things.
Some needed a Header Information with specific Browsers.
Executing java script to read your system envronment for language (geoblocking)
Some need cookies obtained through cross site Scripting (Fraud protection)
and many other Things for various reasons.
So, for your Target Website you can sniff where your call beginns to differ from a working Browser. And then trying to reproduce the functionality for Your Application.
What you encounter is not a TWebBrowser Problem in itself. It is Browser Funtionality used to have Features like Geoblocking, Addblock detection or whatever. So you need to implement the missing Parts: Cookie Storage and/or Java Script.
The downside is: you only find one missing Part after the other. So when you start you dont know if you will hit a dead end. Doing "real Internet Sites" with TWebBrowser (based on IE 5.5) was not easy and that was around 2005 ... in the early easy days...
Optional: If you have an Invitation from the Site owner through an Api Key (or something similar for Authentification) it should work with the TWebBrowser. If all the "Protection" is not needed it worked on almost everyting.
I never found a solid working Solution, but changing the Header to be IE5.5, enabling the newer Mode(non legacy?) and Cookies + Script helped.
If possible try it with the new Edge Component or an embedded Chrome / Firefox / Opera.
In the End we used a microsoft IE COM Component and not the Delphi Component. But even then, not everything was working.
print.print_always_silent use to print the page without print dialog box. My question is, can we do this my PHP / JQUERY code?. Please Help me how know well abt this.
I hope not. That would mean any website could print any document from my printer when they want. Would be a huge security hole imho
This is certainly not possible through the browser with PHP, which runs on the server. It's also not possible with javascript: browser security ensures that. Imagine what might happen if any web site could print whenever it wanted to.
There are (or were) ActiveX controls available for IE that enabled this. It might be possible with a browser extension for Chrome or Firefox if you want to explore that.
One other possibility is setting up a printer on Google Cloud Print and having your PHP server print directly to that, bypassing the browser altogether. Handling the authentication behind such a scheme could be tricky, but the API is documented on Google's site.
I want to write an application in Delphi which filters requested URLs in the OS (not only web browsers) and if it matches - blocks it or changes the URL's content to blank. The problem is - I don't know where to start looking. Could you help me with some informations?
I think you're talking about a DNS service. usually, DNS services live outside, on your router, your ISP, or a 3rd-party like www.openDNS.org
But you could write your own, run it on your PC, and set your internet settings to use that as your DNS server.
I suspect that a lot of malware works like this....
Also, this sort of thing can be done with no programming at all - just edit your hosts file in C:\WINDOWS\system32\drivers\etc\hosts (it's a text file with no extension).
Anything in there should trump.
Also, before you start writing an application to do this, have a look at OpenDNS. If it's an app for personal use, you may find that you don't need it. If it's going to be a commercial offering, this is the bar for usability and usefulness that you need to meet or beat.
http://www.mail-archive.com/delphi-talk#elists.org/msg01558.html - text by Francois PIETTE quoted bellow(in case link will become unavailable):
"There are several way to achieve your goal. The two main I see are:
1) Write a LSP (Layered Service Provider)
2) Write a proxy server
The first is not possible with Delphi (At least I think so. If anyone know
how to write a LSP using Delphi, I would love to get the code).
The second - writing a proxy - is more or less easy with Delphi using ICS
components. See "usermade" link at ICS website (http://www.overbyte.be).
With this option, you have to configure IE to use the proxy: IE Menu / Tools
/ Internet options / Connections / Network parameters / Use a proxy and then
enter the IP address (127.0.0.1 if proxy run on the same computer) and port
number (pick anyone you like, for example 8080). Once IE is configured to
use a proxy, it will send all requests to the proxy. Then the proxy will
make the real request to the target server and return data back to IE. What
is important there is that you get all URL entered in IE or indirectly use
(clicking on links), and you can either really rely them to the target
server or forge and answer your self to say the page access is denied.
At ICS website, on the usermade page, you'll even find a HTTP proxy
component. If you need help with this component and/or the entire ICS,
please use ICS support mailing list (same server as this list). See
"support" link at ICS website for support details."
LE: it seems that this question is possible a duplicate
Using delphi to block websites
use GetExtendedTcpTable api locate if there are any connexions to the remote server you want to block on port 80 if there is a connection use SetTcpEntry to terminate that connexion is pretty simple
The reason I don't want to go the browser plugin way is that you need to implement it for various browsers.
Like xpi for firefox, browser helper object for IE.
My target platform is only windows, and I just want the alternative of browser plugin to call a client side programe after instructed when the user is browser the web page.
Is that viable?
The only "viable" solution would be to register a protocol handler system-wide so say addresses starting with "myprotocol://" trigger your app. Users will still need to install your program and your program will only have access to the parameters passed by that protocol handler, so you will have to evaluate on your own if it's worth it.
Also note that some browsers or settings might show a confirmation message before using your new protocol for the first time, so users should be informed on what to do (and warned that this prompt is part of the normal workings of your app).
I am facing this problem while debugging a website.
Plugin used: tamper data for fire fox;
Possibilities: its a ajax request.
as you see in the image the tamper dialog dose not show anything for this request. for other request it shows the general options.
any known issue with this.
And I also want to know if any other better tool available for analyzing websites(live or remote, not on localhost)
Tamperdata is the buggiest thing ever made, even the UI takes 50 clicks to do anything. Look for another tool. I personally use HackBar to send simple POST/GET requests (there's a version that can modify cookies per request too I think), and Wireshark or livehttpheaders (although livehttpheaders is also buggy) when I need to analyze traffic.