Vitaliy wrote:
> Jake Anderson wrote:
>   =

>> In his shoes I'd write a little python script (php can do threading but
>> its not as nice) that when a request comes in, fires off a bunch of
>> threads to go and grab data, when they return you format them then pump
>> them out to the client as they come in (rember to flush the buffers).
>>     =

>
> OK, this is exactly what I was getting at.
>
> I was telling David (the web developer) that it seems that the data is =

> returned as it becomes available. In other words, if Digikey's website wa=
s =

> down, you would get all the data from other websites as it became availab=
le, =

> and then an error at the bottom of the page saying that Digikey.com has =

> timed out.
>
> David argues that that is impossible ("that's not how HTTP works"), and t=
hat =

> FindChips.com goes out, grabs ALL the data, and then puts it in HTML form=
at =

> and sends it to the browser.
>
> My understanding is that since the server feeds HTML to the browser in =

> chunks, it does not need to know what the footer looks like, when it star=
ts =

> sending the header.
>
>   =

>> My programming services are available ;->
>>     =

>
> I will definitely keep it in mind. BTW, David is also a Python/Django fan =

> who is not too excited about PHP -- is that the new trend? :)
>
> Vitaliy =

>
>   =

Hi Vitaliy.

Sorry for piping up so late.

It is most likely that the FindChips webserver is processing what is =

called a No-Parsed-Header response, and that the script on the server is =

=E8collating=E8 the results of mltiple =E8source=E8 requests, formatting th=
em, =

and then dumping the results to the client (you) as the results become =

available.

I have done something similar before. It is relatively easy to do in =

Perl with the CGI module. It requires web-server support as well as =

special programming methods.

See the references like:

http://www.oreilly.com/openbook/cgi/ch03_08.html

Other names the Non-Parse-Header concept goes by is Server Push, NPH, =

and more.

Rolf
-- =

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