Your GetCapabilities response is broken:
error on line 6119 at column 56: Unescaped '<' not allowed in attributes values
Looking at the response it seems that you do not have a generic.sld for layer opc_postos_sba - so there seems to have been some corruption of your data directory. This can be fixed by going to that layer and changing it's style to one ...
Your code is not correctly setting the info_format so you get the default format (text/html). This is because you are setting too many arguments in:
var url = UnTiled.getSource().getFeatureInfoUrl(
which should be
var url = UnTiled....
Ok i eventually succeeded, the problem with the four parameters was the default regex expression of GeoServer : ^[\w\d\s]+$
This regex wasn't recognizing the dots in the coords numbers, so I changed it to ^[.\w\d\s]+$ ant it was all sorted!
I answer myself, this is the solution:
After much head scratching and asking the guys who wrote this stuff on the users mailing list I have a solution to this that works.
First ignore the JDBC Authentication Provider, it only tests if the user can log into the JDBC database, which may be useful for someone but I'm not sure who.
You need to create (at least) a JDBC User Group Service (follow these ...
The whole point of VendorOption is to warn you that it is something a vendor has added to the standard and that it probably won't work if you move to a different vendor (i.e. from QGis to GeoServer).
If you want to add a symbol to the beginning and end of the line in GeoServer then you need to use a function to transform your line into a point (Start_Point ...