[Laszlo-dev] proposal for API extension to dataset for explicit proxy server host

[P T Withington]

So the src attribute would still be the real source of the data?

Presumably the proxy needs to vet the requestee and the source being  
requested so that it does not act as an 'open relay'?

I wonder if we should have a global proxy config file like [proxy.pac] 
(http://wp.netscape.com/eng/mozilla/2.0/relnotes/demo/proxy-live.html)

On 2007-07-13, at 12:25 EDT, Henry Minsky wrote:

> I recently ran into an issue when trying to deploy a SOLO app to a  
> host
> which is not running
> the LPS server. I need to access 3rd party data and images from a  
> server,
> and due to security
> policy in Flash and DHTML runtimes,  need a proxy server living on  
> the same
> host that my app is served from.
>
> There have been a couple of different PHP HTTP proxies written, and  
> I'd like
> to add support to our
> data API to specify an explicit URL for the proxy server. Currently  
> it is
> implicitly generated using
> LzBrowser.getBaseURL( ) as the url.
>
> I propose adding a "proxyhost" attribute to dataset, which  
> specifies the
> host to forward requests to.
> HTTP requests would still be formatted using the existing LZX proxy
> protocol, so the server to
> which you point would be expected to look like an LZX server for  
> purposes of
> requests which are marked
> as lzt=data or lzt=media. However, it would not be necessary for  
> the proxy
> server to support all the optional args
> such as cache control or header forwarding.
>
> The syntax would look like this
>
> <dataset name="mydata" proxyhost="myproxy.php"/> for a relative url or
>
> <dataset name="mydata" proxyhost="/myproxy.php"/> relative to host  
> server
> root directory
>
> <dataset name="mydata" proxyhost="http://myhost.com/proxy/ 
> myproxy.php"/>
> for an absolute url (needs to be
> on same host as app served from for default security policy of most
> browsers)
>
> Another option would be some global canvas setting
>
> <atttribute name="proxyhost" value="/myproxy.php"/>
>
> or
>
> <canvas proxyhost="/myproxy.php">
>
>
>
>
>
>
>
>
>
>
> -- 
> Henry Minsky
> Software Architect
> hminsky at laszlosystems.com