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#1 ·  Posted (edited)

Most of this code is from an similar project posted here.

The difference is that this one uses 100% TCP.

It is also just a skeleton of what it could achieve - and not limited like the other one was.

So, what is meant by "Passive"?

Unlike the other code... As the proxy receives data from the web server,
it will immediately forward it to the browser. So, when you download a file,
you will see it in real time from the browser, along with whatever progress
dialog it may have.

I consider this script a good start at what I'd like to see it become eventually --
If and when I find the time to work on it.

Please let me know if any crashes, bugs or quirks. Thanks!

Updated: August 31, 2014 - Various improvements.

Known issues:

- Some TCP functions do not work correctly in 64bit. I have not tried to track that down yet.

- HTTPS is not supported yet.


Edited by ripdad
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Make yourself sheep and the wolves will eat you - Benjamin Franklin

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#2 ·  Posted (edited)

Updated 1st post to v0.2b


Now that I have some time, let's talk a little about this script.

It is your browser that makes the request to a web server
based on the source code of web documents (ie: html, js, css, etc.).

There are plug-ins that allow "some control" over the content,
but not "total control".

A firewall is good, but they don't handle traffic content.
You still need a firewall - even if it's Windows Firewall.

At first, I tried to find a way to intercept web traffic by various
means, but nothing seemed to work the way I wanted.

In the end, the only way to get "total control" is with a local proxy.


Three main points:

1) This is a single socket script; one for the browser and one for the remote server.
There is no point in attempting true multiple socket transfers, because AutoIt
is not multi-threaded. As a result, it will be slower loading a web page --
from your browsers point of view.

2) And so, I consider this program good for "Light to Medium" browsing.

3) I came to the conclusion, that it's best that the browser handle secure
connections. As a result, This Script does not support secure connections.


I took the script for a test ride on 'tube to see how it performs with streaming,
and it did well (for me), with no problems.

I downloaded a 56Mb file at about 650kb/s. Not bad for a single socket script.

I have not tested it for sites that hosts java/flash games, etc.


Okay, lets talk about some particular things of operation.

Most likely, the first time you run this script, Windows Firewall will pop up and ask
permission to allow this program to get access. This is normal - just click yes.

The GUI appears afterwards and you'll notice that "AutoProxy" is unchecked. This is a
feature that is in Firefox and Internet Explorer that uses "system settings" found in
the registry.

In order to use this script, you must configure your browser to use a proxy.
Most are located under Tools->Options->Network (or something like that).

I don't know about other browsers, but in Firefox, under the "Connection Settings" dialog,
there is a setting called: "Use system proxy settings". It is usually set there by default.
If you leave it there and place a checkmark in "AutoProxy", then you are good to go!

For manual entry, on that same dialog, it's called: "Manual proxy configuration".
The IP and Port are located at the top of this programs title bar.
Type the IP number in "HTTP proxy" and the Port number in "Port".
Click ok and that should do it.

Keep in mind that, if you go the manual entry method, the proxy must be running when
browsing. If the proxy is not running, the browser will show a connection error.

If you go with the "AutoProxy" method, the browser will work as expected when both
are running. Without the proxy running or "AutoProxy" is unchecked, the browser will
work in its normal mode of operation, as if there was no proxy.

Of the two methods, manual entry is the most secure.

As a note, you can set the behavior of "AutoProxy" to default as "checked" near
the top of the script. ie: Local $AutoProxy = 1

In addition, I added code to save the original settings of the registry when
that feature is used. When this program closes, it will restore those settings.


Let's move on to the Blacklist and Whitelist features.

The only reason I added a Blacklist to this script, is because even if you have
a site whitelisted, there are some things you don't want from that same site.

The List's are not strict. You can add a partial string and it will detect on that.
ie: ad-serve or or
Any one of those should work.

Most major sites have resource or image servers in addition to their own servers.
I suppose these days, most are using Cloud servers in one way or another.

Some sites have no resource server; the site server handles all of it. Some sites
have one resource server and others might have as many as a dozen of them.

So, in order to get "The Full Browsing Experience" of a site, you will also
need to add their resource servers. You'll be able to know who they are by
viewing the edit window of the GUI when browsing to a site.

For example, you whitelisted and went to it in your browser.
You might notice in the edit window of the GUI several entries that read
something like this:


It's a safe bet that those are resource servers for the site you whitelisted.
If you can, add the partial string and it will catch them all. ie:
If you can't, then you'll have to add each one on their own line.

Sometimes, when reading a topic in a forum, the member will post an image
from an outside source. For instance:

If you really want to see that image - then you'll have to whitelist that
outside source -- either temporarily or permanently.


Known Bugs or Quirks

1) Sometimes, the browser will reset. I haven't been able to track that down yet,
as it doesn't happen often enough.

2) A TCPConnect timeout can last up to 20 seconds while freezing the GUI, if a
site is not responding. I am currently looking for something that will replace
it, in this particular code. So far, all it does is cause more problems if I try
some existing code that deals with timeouts.


A few more things...

I wrote this script in UltraEdit32, using AutoIt v3.3.6.0, and then checked
against v3.3.8.1 and v3.3.10.2, on WinXP Pro SP2. So, it should be compatible
across those versions of AutoIt.

I tested this script using FireFox and nothing else. I don't have the time
nor the will to make it compatible for all browsers, if it is indeed needed.

I have not done any extensive testing on Vista+.

TODO: the upload code - to properly handle files larger than 100kb.


Edited by ripdad

Make yourself sheep and the wolves will eat you - Benjamin Franklin

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I had a chance to work on this recently -- so here is an update, such as it is.

1st post updated to v0.3b

Make yourself sheep and the wolves will eat you - Benjamin Franklin

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