HandleURL and concurrent access

Targets Web
1

Hypothesis:
I have a standalone webapp with a code into the app.HandleURL event; this code requires 2 seconds to be executed.
At 12:00:00, my app receives a connection; the code start its execution and it will be terminated at 12:00:02.
At 12:00:01, my app receives another connection; now what’s happen? This request wait till the first request will be terminated or this request will be executed in parallel with the first one?

2

Ciao Pietro,
It will work in parallel

3

Grazie Antonio

4

…and now another question.

If I get some data into the app.HandleUrl from the app.HandleURL.Request.entity or app.HandleURL.Request.QueryString, how can I pass them to the session?

5

It depends which Session you are talking about since there could be several at any given time.

  • you could iterate through them using App.SessionCount and SessionAtIndex
  • you could use a WebThread from a Session to pull the data from a buffer
6

[quote=310749:@Greg O’Lone]It depends which Session you are talking about since there could be several at any given time.

  • you could iterate through them using App.SessionCount and SessionAtIndex
  • you could use a WebThread from a Session to pull the data from a buffer[/quote]

The code in my App.HandleURL can generate 2 results:
If the request is only for data, it responds like a webservice and there will not be any session.

Request.Print "my response as webservice style"
Return True

If the request is for a page, I have to start a session and show a page using the data coming from the app.WebRequest.
So I can’t use your first suggestion, because in the App.HandleURL there isn’t the session yet.
I think I could use your second suggestion (WebThread), but I don’t know how to use it. Is there any example in the xojo’s documentation to take a look?

7

Simply redirect the user to the app with JavaScript Location. If you need some parameters about the user add them to the URL so you can read them in Session.

8

I do it with an hash.
Sending Request.Print "<html><head><script>location='http://0.0.0.0#"+hash+"'</script></head><body><a href=""http://0.0.0.0#"+hash+""">klick</a></body></html>"

With some code in session.open I use me.HashTag to get same data into the session

9

“Parallel” would imply that the app could do more than one thing at a time, it cannot.

If during the processing of request #1 the framework has opted to yield to another thread then the appearance of handling two requests simultaneously might occur. All that would really happen is the processing of #1 would take longer than necessary because of #2.

10

Or just use a redirect.

request.header("Location") = "http://your.domain.name/" Request.Status=302 Return True