[OpenLayers-Users] Capture Tile information

[Andreas Hocevar]

On Thu, Feb 16, 2012 at 4:28 PM, francescoboccacci at libero.it
<francescoboccacci at libero.it> wrote:
> sorry Andreas, my misunderstanding. I would like to try to manage some
> information about traffic request from the server.

You should do that on the server really.

Andreas.

> That's all. Thanks for your suggestions.
> Francesco
>
>>----Messaggio originale----
>>Da: ahocevar at opengeo.org
>>Data: 16/02/2012 16.20
>>A: "francescoboccacci at libero.it"<francescoboccacci at libero.it>
>>Cc: <openlayers-users at lists.osgeo.org>
>>Ogg: Re: Re: Re: Re: Re: [OpenLayers-Users] Capture Tile information
>>
>>You cannot. All I was saying was that the tileloaded event is also
>>fired for tiles that come from the cache. Why would you want to know
>>which tiles come from the browser cache?
>>
>>Andreas.
>>
>>On Thu, Feb 16, 2012 at 4:15 PM, francescoboccacci at libero.it
>><francescoboccacci at libero.it> wrote:
>>> Hi Adreas, how is possible capture this information?
>>>
>>> I use this code:
>>>
>>>
>>> layer.events.register("tileloaded", layer, function() {
>>>                if (document.getElementsByClassName("olImageLoadError").
>>> length) {
>>>                       error+=1;
>>>                 }
>>>    });
>>>  By this way i count the number of tiles that aren't loaded. How can
> capture
>>> the tiles coming from the  cache?
>>>
>>> Thanks in advance
>>>
>>> Francesco
>>>
>>>
>>>>----Messaggio originale----
>>>>Da: ahocevar at opengeo.org
>>>>Data: 16/02/2012 16.08
>>>>A: "francescoboccacci at libero.it"<francescoboccacci at libero.it>
>>>>Cc: <ramotswa at gmail.com>, <openlayers-users at lists.osgeo.org>
>>>>Ogg: Re: Re: Re: Re: [OpenLayers-Users] Capture Tile information
>>>>
>>>>No, this is not possible. But the tileloaded event will also fire when
>>>>the image comes from the cache.
>>>>
>>>>Andreas.
>>>>
>>>>On Thu, Feb 16, 2012 at 2:56 PM, francescoboccacci at libero.it
>>>><francescoboccacci at libero.it> wrote:
>>>>> Good solution.. the last question is:
>>>>> i can capture if an error is occurs during the tile loading
>>> (olImageLoadError)
>>>>> , but is possible to check if the tile is already present in my cache
> (304
>>>>> response from server)?
>>>>> Thanks again ..
>>>>>
>>>>> Francesco
>>>>>
>>>>>>----Messaggio originale----
>>>>>>Da: ramotswa at gmail.com
>>>>>>Data: 16/02/2012 14.48
>>>>>>A: "francescoboccacci at libero.it"<francescoboccacci at libero.it>
>>>>>>Cc: <bamerbalazs at gmail.com>, <openlayers-users at lists.osgeo.org>
>>>>>>Ogg: Re: Re: Re: [OpenLayers-Users] Capture Tile information
>>>>>>
>>>>>>So if you had an OSM layer.
>>>>>>
>>>>>>Register an event on tileloaded on it
>>>>>> OSMM.events.register("tileloaded", function (e) {
>>>>>>                var myVar= e;
>>>>>>}
>>>>>>
>>>>>>and then somewhere in "myVar" you need to check if "olImageLoadError"
>>>>>>is present. One area could be myVar.element.childNodes[0].innerHTML
>>>>>>
>>>>>>for me that is:
>>>>>>"<img id="OpenLayersDiv77" style="position: relative; width: 256px;
>>>>>>height: 256px; " class="olTileImage olImageLoadError" src=....>"
>>>>>>
>>>>>>You can do a text comparison to find if olImageLoadError is in there
>>>>>>and report something back accordingly.
>>>>>>
>>>>>>I have not ever implemented this nor do I think it is a particularly
>>>>>>good solution, but it should do what you are after.
>>>>>>
>>>>>>Toby
>>>>>>
>>>>>>
>>>>>>
>>>>>>On 16 February 2012 13:08, francescoboccacci at libero.it
>>>>>><francescoboccacci at libero.it> wrote:
>>>>>>> Hi, can you tell me how look at the css class? can you explain it more
>>>>> clear?
>>>>>>> Can you write a simple example ?
>>>>>>> Thanks in advance...
>>>>>>>
>>>>>>> Francesco
>>>>>>>
>>>>>>>>----Messaggio originale----
>>>>>>>>Da: ramotswa at gmail.com
>>>>>>>>Data: 16/02/2012 14.02
>>>>>>>>A: "francescoboccacci at libero.it"<francescoboccacci at libero.it>
>>>>>>>>Cc: <bamerbalazs at gmail.com>, <openlayers-users at lists.osgeo.org>
>>>>>>>>Ogg: Re: Re: [OpenLayers-Users] Capture Tile information
>>>>>>>>
>>>>>>>>No I understand what you are trying to do, but you can,
>>>>>>>>programatically, look at the css class of every tile that comes in
>>>>>>>>apparently.
>>>>>>>>
>>>>>>>>On 16 February 2012 12:53, francescoboccacci at libero.it
>>>>>>>><francescoboccacci at libero.it> wrote:
>>>>>>>>> ye..with firebug i can see all requests .. but i'd like to capture
> the
>>>>>>> response
>>>>>>>>> from the server if i'm using the tile from my cache or from server
>>> (fresh
>>>>>>> tile).
>>>>>>>>> I don't know if is possible but it will be very interesting.Maybe we
>>> have
>>>>>>> to
>>>>>>>>> work into openlayers code. Thanks
>>>>>>>>>
>>>>>>>>> Francesco
>>>>>>>>>
>>>>>>>>>>----Messaggio originale----
>>>>>>>>>>Da: bamerbalazs at gmail.com
>>>>>>>>>>Data: 16/02/2012 13.38
>>>>>>>>>>A: <openlayers-users at lists.osgeo.org>
>>>>>>>>>>Ogg: Re: [OpenLayers-Users] Capture Tile information
>>>>>>>>>>
>>>>>>>>>>Hi Imran,
>>>>>>>>>>
>>>>>>>>>>> You can see your http request using FireBug, if you are using
>>> FireFox.
>>>>>>>>>>
>>>>>>>>>>Yes, but I thought a check during runtime from JavaScript. So that
>>>>>>>>>>instead of displaying pink tiles, I would write a message about the
>>>>>>>>>>problem with X layer.
>>>>>>>>>>
>>>>>>>>>>best regards: Balázs
>>>>>>>>>>_______________________________________________
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>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
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>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>>
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>>>>
>>>>
>>>>
>>>>--
>>>>Andreas Hocevar
>>>>OpenGeo - http://opengeo.org/
>>>>Expert service straight from the developers.
>>>>
>>>
>>>
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>>
>>
>>
>>--
>>Andreas Hocevar
>>OpenGeo - http://opengeo.org/
>>Expert service straight from the developers.
>>
>
>



-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.