Rails - Nov 2008 - Controller method/action being called twice (once POST and once GET) for file upload - why?

I''m uploading a file via the user''s browser. The index method
in my
controller is:


	<%= form_tag({:action=>''receive_file''}, :multipart
=> true)%>
 		<input type="file" name="user_data_file" />
 		<p></p>
 		<input type="submit" value="Upload" />
	</form>

I get a form with a ''browse'' button and an
''upload'' button. I use the
browse control to select a file and I press the ''upload''
button.

The method ''receive_file'' in my controller gets called (with
method
GET) and executes, then passes control to the corresponding view so
far so good.

The strange thing is that behind the scenes, something immediately
calls my ''receive_file'' method a second time (this time with
method
POST).

Why is this hapenning? How am I supposed to handle it? I don''t want to
execute my receive_file method twice.

Thanks for your help,
Yoram
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per the subject line, further investigation reveals that all the
methods in my controller that i am using, are called exactly twice
each time i expect them to be called once. i am confused...

On Nov 12, 3:07 pm, "yber...-uAjRD0nVeow@public.gmane.org"
<yber...-uAjRD0nVeow@public.gmane.org> wrote:
> I''m uploading a file via the user''s browser. The index
method in my
> controller is:
>
>         <%= form_tag({:action=>''receive_file''},
:multipart => true)%>
>                 <input type="file"
name="user_data_file" />
>                 <p></p>
>                 <input type="submit" value="Upload"
/>
>         </form>
>
> I get a form with a ''browse'' button and an
''upload'' button. I use the
> browse control to select a file and I press the ''upload''
button.
>
> The method ''receive_file'' in my controller gets called
(with method
> GET) and executes, then passes control to the corresponding view so
> far so good.
>
> The strange thing is that behind the scenes, something immediately
> calls my ''receive_file'' method a second time (this time
with method
> POST).
>
> Why is this hapenning? How am I supposed to handle it? I don''t
want to
> execute my receive_file method twice.
>
> Thanks for your help,
> Yoram
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On Nov 13, 1:00 am, "yber...-uAjRD0nVeow@public.gmane.org"
<yber...-uAjRD0nVeow@public.gmane.org> wrote:
> per the subject line, further investigation reveals that all the
> methods in my controller that i am using, are called exactly twice
> each time i expect them to be called once. i am confused...
Anything interesting in your controller? Can you see (using tcpdump or
whatever your platform has) whether the browser is actually making two
requests ?

Fred
>
> On Nov 12, 3:07 pm, "yber...-uAjRD0nVeow@public.gmane.org"
<yber...-uAjRD0nVeow@public.gmane.org> wrote:
>
> > I''m uploading a file via the user''s browser. The
index method in my
> > controller is:
>
> >         <%=
form_tag({:action=>''receive_file''}, :multipart =>
true)%>
> >                 <input type="file"
name="user_data_file" />
> >                 <p></p>
> >                 <input type="submit"
value="Upload" />
> >         </form>
>
> > I get a form with a ''browse'' button and an
''upload'' button. I use the
> > browse control to select a file and I press the
''upload'' button.
>
> > The method ''receive_file'' in my controller gets
called (with method
> > GET) and executes, then passes control to the corresponding view so
> > far so good.
>
> > The strange thing is that behind the scenes, something immediately
> > calls my ''receive_file'' method a second time (this
time with method
> > POST).
>
> > Why is this hapenning? How am I supposed to handle it? I
don''t want to
> > execute my receive_file method twice.
>
> > Thanks for your help,
> > Yoram
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Fred, thanks:

Well - per your suggestion, I turned net tracking on in firebug (I''m
using firefox). And the problem went away... like Heisenberg said :-).

Sorry for bothering the list with such artifact.

It''s a little scary to see the browser get in to such a state
though...

Y

On Nov 12, 5:48 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On Nov 13, 1:00 am, "yber...-uAjRD0nVeow@public.gmane.org"
<yber...-uAjRD0nVeow@public.gmane.org> wrote:
>
> > per the subject line, further investigation reveals that all the
> > methods in my controller that i am using, are called exactly twice
> > each time i expect them to be called once. i am confused...
>
> Anything interesting in your controller? Can you see (using tcpdump or
> whatever your platform has) whether the browser is actually making two
> requests ?
>
> Fred
>
>
>
>
>
> > On Nov 12, 3:07 pm, "yber...-uAjRD0nVeow@public.gmane.org"
<yber...-uAjRD0nVeow@public.gmane.org> wrote:
>
> > > I''m uploading a file via the user''s browser.
The index method in my
> > > controller is:
>
> > >         <%=
form_tag({:action=>''receive_file''}, :multipart =>
true)%>
> > >                 <input type="file"
name="user_data_file" />
> > >                 <p></p>
> > >                 <input type="submit"
value="Upload" />
> > >         </form>
>
> > > I get a form with a ''browse'' button and an
''upload'' button. I use the
> > > browse control to select a file and I press the
''upload'' button.
>
> > > The method ''receive_file'' in my controller gets
called (with method
> > > GET) and executes, then passes control to the corresponding view
so
> > > far so good.
>
> > > The strange thing is that behind the scenes, something
immediately
> > > calls my ''receive_file'' method a second time
(this time with method
> > > POST).
>
> > > Why is this hapenning? How am I supposed to handle it? I
don''t want to
> > > execute my receive_file method twice.
>
> > > Thanks for your help,
> > > Yoram- Hide quoted text -
>
> - Show quoted text -
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