[Javascript] Forward image via http with ajax

[Terry Riegel]

> On Feb 3, 2007, at 12:52 PM, Terry Riegel wrote:
>
>> 1. IP camera (LAN)
>> 2. Web Browser (LAN)
>> 3. Router (gateway between LAN and WAN)
>> 4. Web Server (WAN)
>>
>> I need to move the image from the (1) The IP camera to (4) The Web  
>> server. I am trying to do this using (3) The web browser as the  
>> agent to move it.
>
> I believe what you want to do is impossible.  If it's not, it  
> should be, as it would allow a JavaScript to funnel content from a  
> private LAN (presumably private to prevent just such funneling) to  
> a remote server without user approval.

Wouldn't the web browser be the "User Approval" part, or am I missing  
something.

> To avoid this kind of security problem, JavaScript can only load  
> content from servers within the same domain as the JavaScript  
> itself.  If that domain is the web server (4), you won't be able to  
> load data from the IP camera (1).  If that domain is the IP camera  
> (1), you won't be able to send the data to the web server (4).  If  
> you want to steal images from an unwilling LAN, I think (hope)  
> you'll at least need a co-conspirator within the LAN.

If I wanted to steal images that would be wrong.

Thanks for all the great comments and advice. I will keep fiddling,  
but I am thinking this may not be possible.

Terry