At 09:57 AM 6/3/97 -6, Peter Trei wrote:
Jim Choate wrote:
I have been looking at how to impliment picketing on the web. To date I have been unable to come up with a way to force a connection to one machine to go through a third machine in order to express some view about the original target.
There are a couple ways to do it. One would be to implement an "anonymizer" type scheme, where you "hijack" an unsuspecting surfer by sending him/her off to http://www.evil.hijacker.org/www.yahoo.com, where your server does the surfing for the victim, editing and picketing the HTML returned. You can do anything you want to them, your machine is in control of the http connections. Another method, which is quite a bit easier (and I've enclosed an example below,) is to throw up a frame; giving the bottom of the users the screen to wherever they surfed to, but retaining a frame on the top to play your parade of protest animated gif banners. Note that both of these require you to be an unscrupulous stealer of other peoples browser space. They also require the users arrive at your site first, and leave via your links (their own bookmarks or typed URLs will let them off the hook.) I don't know of a way (short of usurping a DNS server's authority) of getting hooked into their site from the first. I suppose if you ran a router between the site you wished to hijack and the viewer whom you've hijacked, you could, but we're talking MAJOR no-no (and lots of code) here. Enclosed is an example set of files that shows "permanent" frames of the type that hang around and annoy people. Cut'n'paste to save them to your local machine, then open the file fooIndex.htm with your frame-enabled browser. Notice how the banners (picket signs) hang around even after linking off to somewhere else. The drawback to this method is that your protest is not "dynamic". If they're on your vegetarian site, and follow your link to www.beef.com, your banners will scream "Meat is Murder." However, if they then follow the link from www.beef.com to www.fur-coat.com, they'll still be under "Meat is Murder" banners. You'd be unable to display the "Fur is Dead" banners, because the browser hasn't been talking to you since it loaded your page. John -- fooIndex.htm -- cut here -- <HTML><HEAD><TITLE>Picket Line</TITLE></HEAD> <frameset rows="80,*" framespacing="0" frameborder="0" border="0"> <frameset cols="400,*" framespacing="0" frameborder="0" border="0"> <frame src="fooTop.htm" SCROLLING="NO" NORESIZE MARGINWIDTH="6" MARGINHEIGHT="6" > <frame src="fooTopRight.htm" SCROLLING="NO" NORESIZE MARGINWIDTH="6" MARGINHEIGHT="6" > </frameset> <frame src="fooMain.htm" SCROLLING="AUTO" NORESIZE MARGINWIDTH="0" MARGINHEIGHT="0" BORDER="0" > </frameset> </HTML> -- fooTop.htm -- cut here -- <HTML><HEAD><TITLE>FooTop Title</TITLE></HEAD> <H4> This is FooTop. </H4> Down with Foo! </HTML> -- fooTopRight.htm -- cut here -- <HTML><HEAD><TITLE>FooTopRight Title</TITLE></HEAD> <H4> This is FooTopRight. </H4> Down with Bar! </HTML> -- fooMain.htm -- cut here -- <HTML><HEAD><TITLE>FooMain Title</TITLE></HEAD> <H4> This is FooMain. </H4> Not to be confused with EggFooMein. <P> Click here to not be here. </HTML> -- fooBar.htm -- cut here -- <HTML><HEAD><TITLE>FooBar Title</TITLE></HEAD> <H4> This is FooBar. </H4> You're not where you were before, but there are still picketers hanging about. <P> Where we want you to go today. </HTML> -- end files -- cut here -- -- J. Deters "Don't think of Windows programs as spaghetti code. Think of them as 'Long sticky pasta objects in OLE sauce'." +--------------------------------------------------------------------+ | NET: mailto:jad@dsddhc.com (work) mailto:jad@pclink.com (home) | | PSTN: 1 612 375 3116 (work) 1 612 894 8507 (home) | | ICBM: 44^58'36"N by 93^16'27"W Elev. ~=290m (work) | | For my public key, send mail with the exact subject line of: | | Subject: get pgp key | +--------------------------------------------------------------------+