Hmm, I'm definitely not an expert with this web stuff. But maybe PHP
does some stuff behind the scenes to simplify the process.
The next step I would try is to look at what arguments the servlet
receives (if any). Something like this (not tested)
ArgString =
for N#Val in {Application.getCgiArgs plain} append:App do
{App {VirtualString.toString N#": "#Val#", "}}
end
and then show ArgString in the HTML output.
Cheers,
Wolfgang
On Wed, Jul 7, 2010 at 4:22 PM, mark richardson <[email protected]> wrote:
> Hi,
>
> Thanks again for your help. I've just finished a rather lengthy reply to
> Boriss Mejias about the same problem.
>
> I already have the HTML form correctly implemented as you have described.
> (And I can do the same thing in PHP so the server is set up ok).
>
> However, you say that the server provides the name of the file to the cgi
> script - I had read that the file itself (presumably as binary data) was
> passed to the script via STDIN? Also, if the filename was passed to the
> script I would assume my script would respond with the filename outputted
> within the HTML fed back to the server?
>
> As Boriss has demonstrated, the script correctly takes data from STDIN and
> returns it inside HTML code on the command line.
>
> This all seems really confusing: Apache2 works, PHP file upload works, OZ
> n-queens servlet works (with a form type="text") but file upload won't????
>
> Regards
>
> Mark
>
> On 07/07/10 15:09, Wolfgang Meyer wrote:
>>
>> To let the user upload a file, you need a two-step process.
>>
>> First you need an HTML file (possibly generated by a servlet) with a
>> form with enctype='multipart/form-data' and an input field with
>> TYPE="FILE". In the "action" attribute you specify which
>> script/servlet to call after submit.
>>
>> In the servlet which is called after submit, the web server will
>> provide the name of the uploaded file as an argument to the script. I
>> think the exact details depend on the server.
>>
>> Google "cgi file upload" for details.
>> I've never used this with Oz, so I have no idea whether there are any
>> special pitfalls to avoid.
>>
>> Cheers,
>> Wolfgang
>>
>> On Mon, Jun 28, 2010 at 5:14 PM, Mark richardson
>> <[email protected]> wrote:
>>
>>>
>>> Hi,
>>>
>>> I wonder if anyone has any experience using Oz for cgi-bin servlets?
>>> I've already successfully created one to give a solution for n-queens for
>>> a
>>> submitted board size so I know I can use the facility properly.
>>> What I'm now trying to do is create an 'upload-file' servlet in oz.
>>> As far as I understand the operation of cgi (and I'm no expert!), in the
>>> case of file uploads the data for the file itself is passed via the
>>> servlets
>>> stdin.
>>> So, I have the following functor definition:
>>>
>>> %%cgi-bin program to accept file uploads
>>> functor
>>> import
>>> Open
>>> Application
>>> OS
>>> define
>>> StdIn={New Open.file init(name:stdin flags:[read])}
>>> Env={StdIn read(list:$)}
>>> Out={New class $
>>> from Open.file Open.html
>>> end
>>> init(name:stdout)}
>>>
>>> %% Print MIME content header
>>> {Out header}
>>> {Out tag(html(head(title('Upload files using Oz'))
>>> body(bgcolor:'#f0f0e0'
>>> h1('Oz file upload')
>>> p('The data received was:'#Env)
>>> )))}
>>> {Application.exit 0}
>>> end
>>>
>>> I'm not currently worried about what actually is received, I'd be happy
>>> at
>>> the moment to see anything coming into 'Env'. My problem is that I appear
>>> to
>>> be receiving nil. The servlet executes but nothing appears after "The
>>> data
>>> received was:".
>>>
>>> The difficulty is that I can't see any way of debugging this except
>>> executing it through the web server, so I don't know if 'something' has
>>> been
>>> received or not.
>>>
>>> Any advice would be gratefully received.
>>>
>>> Regards
>>>
>>> Mark
>>>
>>> --
>>> Mark Richardson MBCS
>>> Email: [email protected]
>>> Skype: mark.richardson.
>>>
>>>
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>>> mozart-users mailing list
>>> [email protected]
>>> http://www.mozart-oz.org/mailman/listinfo/mozart-users
>>>
>>>
>>
>>
>> _________________________________________________________________________________
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>>
>
>
> --
> Mark Richardson MBCS
> Email: [email protected]
>
> _________________________________________________________________________________
> mozart-users mailing list
> [email protected]
> http://www.mozart-oz.org/mailman/listinfo/mozart-users
>
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