Re: How to implement a dropdownlist in CherryPy where selected item is returned as argument appended to current URL?

JavaScript, Java Run Time, etc. are not consistently available on the=20
client side.=C2=A0 Thus development of code, publishing, on the server side=
=20
to leverage any variant of Java becomes useless.=C2=A0 In my case, simply=
=20
put, if the word Java is referenced in the design of the project, it is=20
a non-starter, not allowed.

Moreover, IoT devices can acts as clients as well... have worked on=20
project where they have done duel tasking, acting as both client and=20
server functions, even more than just an access point.=C2=A0 There is even=
=20
one project I know of where the IoT devices are mesh linked, responding=20
and acting as publishers and subscribers to many other devices to act as=20
a locus of interactive nodes.=C2=A0 An IoT device that uses curl is not=20
considered a client?=C2=A0 Clients are not limited popular browsers compete=
nt=20
or otherwise, leveraging HTML.=C2=A0 REST APIs are just to tempting to=20
developers, their pros and cons, not qualified here.

As for secure or not secure... that is not for anyone to qualify but the=20
ultimate user, client, etc.=C2=A0 As note above, Java is declared, and its=
=20
variants, as insecure, requirement of design goals.=C2=A0 IMHO never qualif=
y=20
something as secure... nothing is secure, other than a device connected=20
to nothing and never powered on, and even that maybe previous exploited=20
in some way.=C2=A0 There are many zero day exploits in all technologies jus=
t=20
waiting to be leveraged.=C2=A0 Ask any fortune 50 company how much vetting =
is=20
done in a lab before any technology is deployed.=C2=A0 The term secure is=
=20
never used as justification of any technology, rather it is when the=20
benefit of the technology is greater than the risk of using the=20
technology is the question.=C2=A0 But I digress.

Of course none of the above are applicable to my request to solve a=20
unique design goal with key restrictions.=C2=A0 Maybe it will address some =
of=20
your concerns as noted.

On 05/14/2019 15:42, Tim Roberts wrote:
> Jibun no Kage wrote:
>>
>> As I am sure many have gathered, I am working under some unique=20
>> requirements.=C2=A0 Straight HTML would be without use of any optional=
=20
>> scripting language, i.e. that will likely be disabled. Java script as=20
>> one example is restricted and even prohibited in some secured=20
>> environments.=C2=A0 In secured micro-controller environments for example=
,=20
>> there are quite a number of limits and restrictions unique to the=20
>> environment at hand.=C2=A0 This is also typical of Internet-of-Things=20
>> implementations for example.
>
> IoT devices run a web SERVER, not a web BROWSER.=C2=A0 A web browser is a=
=20
> UI concept, and IoT devices don't have a UI.=C2=A0 Javascript runs in the=
=20
> web browser, not on the server.
>
>
>> So assumption that Java is available, i.e. enabled is not a given. ...=
=20
>
> JavaSCRIPT.=C2=A0 Please, those two are very, very, very different=20
> languages used for very different purposes.=C2=A0 The world was done a hu=
ge=20
> misservice when Netscape decided to rename ECMAScript to Javascript in=20
> order to cash in on the "cool word of the day".=C2=A0 You MUST get your=
=20
> terminology straight, because I think that's were some of your=20
> confusion arises.=C2=A0 Your IoT device can send Javascript code in the=
=20
> HTML pages it sends out, knowing that it will be read and executed by=20
> a competent web browser on a user's laptop somewhere.
>
>
>> Moreover, the design goals I am working with is to not use additional=20
>> scripting support, and Java is explicitly prohibited.
>
> Java or Javascript?=C2=A0 There was a time that Java was proposed as a=20
> browser-extension language, just like Microsoft's ActiveX controls.=C2=A0=
=20
> That time is gone.=C2=A0 I can believe that Java is prohibited.=C2=A0 How=
ever,=20
> Javascript support is ubiquitous.=C2=A0 EVERY non-toy browser has it, and=
=20
> it is secure.=C2=A0 I do not believe any serious web-based project today=
=20
> would prohibit Javascript.=C2=A0 It doesn't make sense.
>
>
>> This of course limits the flexibility of the design significantly.=20
>
> Yes.=C2=A0 For example, you cannot implement an "automatic" dropdown list=
=20
> without Javascript.=C2=A0 It is impossible.=C2=A0 Forms can only be submi=
tting=20
> by having the user click a "submit" button.
>
>
>> I am trying a few things using the change of focus and hover events,=20
>> time to get creative.
>
> Change of focus and hover events execute Javascript code.=C2=A0=C2=A0 If =
you are=20
> allowed to handle events, then you are allowed to use Javascript.
>

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