[GTALUG] Sending array variable over CGI ?

[Lennart Sorensen]

On Sun, May 13, 2018 at 12:57:09AM -0400, William Park via talk wrote:
> On Sat, May 12, 2018 at 08:38:23PM -0400, Jamon Camisso via talk wrote:
> > On 2018-05-12 05:48 PM, William Park via talk wrote:
> > > Hi all,
> > > 
> > > If I'm sending single valued data over web, eg. a=111, b=222, c=333,
> > > then I can do 
> > >     http://.../xxx.cgi?a=111&b=222&c=333
> > > 
> > > How do I send array data, like A[1]=111, A[2]=222, A[3]=333 to a CGI
> > > script?  I don't think I can do something like
> > >     http://.../xxx.cgi?A[1]=111&A[2]=222&A[3]=333
> > > Or, can I?
> > > 
> > > I have seen a same variable repeated,
> > >     http://.../xxx.cgi?A=111&A=222&A=333
> > > but that means the CGI script has to build the array.
> > 
> > If JSON is an option, it is pretty easy to do what you're after in
> > javascript. For example, I've been working on a project using
> > crypto.subtle in the browser. I generate a key and an IV with
> > javascript, and it is easy to represent the arrays of bytes like you've
> > specified.
> > 
> > 
> > For example: I have an IV Uint8Array(16) that looks like this:
> > Uint8Array(16) [ 147, 174, 163, 227, 241, 236, 204, 23, 159, 18, ??? ]
> > 
> > As a string it looks like what you'd expect - iv.toString() shows:
> > "147,174,163,227,241,236,204,23,159,18,218,74,177,105,214,153"
> > 
> > 
> > Now what you're after with mapping in JSON (I've inserted line breaks):
> > JSON.stringify(iv))
> > {"0":147,"1":174,"2":163,"3":227,"4":241,"5":236,
> > "6":204,"7":23,"8":159,"9":18,"10":218,
> > "11":74,"12":177,"13":105,"14":214,"15":153}
> > 
> > 
> > Alternatively, you can get an unkeyed array using Array.from() and
> > converting that to JSON:
> > JSON.stringify(Array.from(iv))
> > "[147,174,163,227,241,236,204,23,159,18,218,74,177,105,214,153]"
> > 
> > Any of that look useful?
> 
> What does URL look like, when sending those 16 integers?
> 
> Or, has Web/CGI evolved to a point where you just include JSON content
> in POST method, and javascript handles the magic behind the scene?

With a lot of people running node.js on the server side, yes that is
often the case.

Things like php of course handle form submitions with arrays nicely
for you.

-- 
Len Sorensen