top posting, as most of the relevant info is self-contained in this email --
Ok, with the help of the suggestions from many of you, and by adding the
following lines to my program, I am no longer getting any error.
..
$map->setMetaData("ows_enable_request", "*");
..
$map->setProjection("init=epsg:4326");
..
$layerOne->setProjection("init=epsg:4326");
..
my $req = new mapscript::OWSRequest();
$req->setParameter("SERVICE", "WMS" );
$req->setParameter("VERSION", "1.1.0" );
$req->setParameter("REQUEST", "GetMap" );
$req->setParameter("BBOX", "-180,-90,180,90" );
$req->setParameter("LAYERS", "mylayer");
$req->setParameter("SRS", "EPSG:4326");
$req->setParameter("WIDTH", "1200");
$req->setParameter("HEIGHT", "600");
$req->setParameter("FORMAT", "image/png");
my $io = mapscript::msIO_installStdoutToBuffer();
my $dispatch_out = $map->OWSDispatch( $req );
printf "%s\n", mapscript::msIO_getStdoutBufferString();
The only problem is -- I am getting an image with nothing in it. This implies
that I have likely got all the params for WMS correct, but now I am screwing up
with some step in the layer creation. The interesting thing is, this is the
same code that works fine as a regular MapServer request; makes an image fast
and quick and correct. Is there a way I can add error logging to my WMS program
to see what is going on at every step? Perhaps capture the database query being
made, etc.
On Sep 8, 2011, at 1:22 PM, Frank Warmerdam wrote:
> Puneet,
>
> I would add that there is a lot of other metadata that you need to set on a
> map in order to get WxS services like WMS working. If you haven't done
> that either you are going to be frustrated.
>
> I would suggest getting your script working initially with an actual mapfile
> and then if you really want to construct the map programmatically use
> that as a guide.
>
> Best regards,
>
> On Thu, Sep 8, 2011 at 11:15 AM, Armin Burger <armin.bur...@gmx.net> wrote:
>> in PHP MapScript should be something like
>> $map->setMetaData("ows_enable_request", "*");
>>
>> in Python:
>> map.setMetaData("ows_enable_request", "*")
>>
>> armin
>>
>>
>> On 08/09/2011 20:05, Mr. Puneet Kishor wrote:
>>>
>>> On Sep 8, 2011, at 1:03 PM, thomas bonfort wrote:
>>>
>>>> it goes in map->web->metadata
>>>>
>>>
>>> I guessed as much, but I can't fathom the syntax. The webObj doesn't seem
>>> to have any constructor, and I don't see any documentation. Could you please
>>> point me to an example?
>>>
>>>
>>>
>>>>
>>>> On Thu, Sep 8, 2011 at 19:48, Mr. Puneet Kishor<punk.k...@gmail.com>
>>>> wrote:
>>>>>
>>>>> a bit more investigation on producing a WMS response via Perl MapScript
>>>>> reveals the following error
>>>>>
>>>>> <?xml version='1.0' encoding="ISO-8859-1" standalone="no" ?>
>>>>> <!DOCTYPE ServiceExceptionReport SYSTEM
>>>>> "http://schemas.opengis.net/wms/1.1.0/exception_1_1_0.dtd";>
>>>>> <ServiceExceptionReport version="1.1.0">
>>>>> <ServiceException>
>>>>> msWMSDispatch(): WMS server error. WMS request not enabled. Check
>>>>> wms/ows_enable_request settings.
>>>>> </ServiceException>
>>>>> </ServiceExceptionReport>
>>>>>
>>>>> So, it seems I have to somehow, somewhere enable 'ows_enable_request'.
>>>>> Looking at the documentation, seems like if I had a map file, I could add
>>>>> the following line to do so
>>>>>
>>>>> ows_enable_request '*'
>>>>>
>>>>> However, I am not using a map file at all. Not finding any documentation
>>>>> on this setting, I tried the following to no avail
>>>>>
>>>>> $map->{ows_enable_request} = '*';
>>>>>
>>>>>
>>>>> Suggestions, anyone?
>>>>>
>>>>>
>>>>> On Sep 7, 2011, at 10:18 PM, Mr. Puneet Kishor wrote:
>>>>>
>>>>>> I would really appreciate insight from someone well-versed in the ins
>>>>>> and outs of WMS via MapScript. Looking at the discussion at
>>>>>> [http://trac.osgeo.org/mapserver/ticket/670], the `img = wms_map.draw()`
>>>>>> step seems to be a crucial part of drawing the image.
>>>>>>
>>>>>> So, I added `my $img = $map->draw();` to my code below, and indeed, the
>>>>>> image was drawn and sent back to the browser.
>>>>>>
>>>>>> Is this something that should be added to the examples in the
>>>>>> documentation? Is this the right way to do things? In any case, I am not
>>>>>> write to STDOUT, and sending the buffer directly. Instead, my code is
>>>>>> very
>>>>>> much like a regular request (and it works) --
>>>>>>
>>>>>> my $new_extent = $map->{extent};
>>>>>>
>>>>>> my $req = new mapscript::OWSRequest();
>>>>>> $req->setParameter( "SERVICE", "WMS" );
>>>>>> $req->setParameter( "VERSION", "1.1.0" );
>>>>>> $req->setParameter( "REQUEST", "GetMap" );
>>>>>> $req->setParameter( "BBOX", "-180,-90,180,90" );
>>>>>> $req->setParameter( "LAYERS", "layer_name");
>>>>>> $req->setParameter( "SRS", "-1");
>>>>>> $req->setParameter( "WIDTH", "1200");
>>>>>> $req->setParameter( "HEIGHT", "600");
>>>>>>
>>>>>> my $dispatch_out = $map->OWSDispatch( $req );
>>>>>> my $img = $map->draw();
>>>>>> my $map_img = 'test_' . sprintf("%0.10d", rand(1000000000)) .
>>>>>> '.png';
>>>>>> $img->save("/path/to/$map_img");
>>>>>> return send_file("/path/to/$map_img");
>>>>>>
>>>>>>
>>>>>> Comments? Corrections?
>>>>>>
>>>>>>
>>>>>> On Sep 7, 2011, at 6:12 PM, Mr. Puneet Kishor wrote:
>>>>>>
>>>>>>>
>>>>>>> On Sep 7, 2011, at 5:49 PM, Mr. Puneet Kishor wrote:
>>>>>>>
>>>>>>>> I am trying to convert my MapScript program to a WMS responder. I
>>>>>>>> create my $map where I set all the layers and classes and colors, etc,
>>>>>>>> just
>>>>>>>> like for a normal, non-WMS request that works perfectly correctly.
>>>>>>>>
>>>>>>>> my $map = undef;
>>>>>>>> $map = mapObj(name => 'mymap') unless defined $map;
>>>>>>>>
>>>>>>>> my $req = new mapscript::OWSRequest();
>>>>>>>> $req->setParameter( "SERVICE", "WMS" );
>>>>>>>> $req->setParameter( "VERSION", "1.1.0" );
>>>>>>>> $req->setParameter( "REQUEST", "GetCapabilities" );
>>>>>>>
>>>>>>> I changed the above line to
>>>>>>>
>>>>>>> $req->setParameter( "REQUEST", "GetMap");
>>>>>>>
>>>>>>> but, still no improvement.
>>>>>>>
>>>>>>>
>>>>>>>>
>>>>>>>> mapscript::msIO_installStdoutToBuffer();
>>>>>>>> my $dispatch_out = $map->OWSDispatch( $req );
>>>>>>>> printf "%s\n", mapscript::msIO_getStdoutBufferString();
>>>>>>>>
>>>>>>>> Except, the above doesn't really do anything for me. I get nothing in
>>>>>>>> my browser. Suggestions?
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Puneet Kishor
>>>>>>>
>>>>>>
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