How do I fix charset problems in .gs script? - utf-8

Question

I have a problem with charsets.
I parsed a csv file in google-app-engine and I'm posting to an uiapp table.
But I checked special characters like áéíóú and those are not well displayed (?square symbol).
When I was setting up my code I played writing the string imported to a google docs document and it worked the same.
some advice please?
I search for:
a global charset definition to the code. or
string var transformation that makes the chars appear like I want to. (avoiding html &number definitions.
Is this related to the blob object?
The thing is important i come from spain and we need such characters.
app that get's a csv ';' delimited file and shows it's content
I post all my code, it's barely as the tutorial that is given.
function arreglaUrl(cadena){
var texto = cadena[cadena.length - 2]
if (texto == ''){
cadena[cadena.length - 2] = 'Sin enlace';
}
else{
cadena[cadena.length - 2] = '<center>Link.</center>' ;
};
}
function parsedCSV(){
var listaArchivos = DocsList.getFolderById('XXXXX').getFiles()
for (var i = 0; i < listaArchivos.length; i++) {
if (listaArchivos[i].getName() == 'baul.csv'){
var origen = listaArchivos[i];
};
}
var texto = origen.getContentAsString();
var arra = Utilities.parseCsv(texto,";");
return(arra);
}
function doGet() {
var datos = parsedCSV()
var baul = Charts.newDataTable()
for (i = 0; i < datos[0].length; i++){
baul.addColumn(Charts.ColumnType.STRING, datos[0][i])
}
for (i = 1; i < datos.length; i++){
arreglaUrl(datos[i]) // this only makes some html i need to post some links
baul.addRow(datos[i])
}
baul.build();
var sectorFilter = Charts.newCategoryFilter()
.setFilterColumnLabel("sector")
.build();
var tipoFilter = Charts.newCategoryFilter()
.setFilterColumnLabel("tipo")
.build();
var searchFilter = Charts.newStringFilter()
.setFilterColumnLabel("Titulo")
.build();
var searchDesc = Charts.newStringFilter()
.setFilterColumnLabel("descripcion")
.build();
var tableChart = Charts.newTableChart().setOption('allowHtml', true).setDimensions(0,0)
.build();
var dashboard = Charts.newDashboardPanel()
.setDataTable(baul)
.bind([sectorFilter, tipoFilter, searchFilter, searchDesc], [tableChart])
.build();
var uiApp = UiApp.createApplication().setTitle('Baul de Recursos');
var anchoTotal = '100%';
dashboard.add(uiApp.createVerticalPanel()
.add(uiApp.createHorizontalPanel()
.add(sectorFilter)
.add(tipoFilter)
.setSpacing(15)
)
.add(uiApp.createHorizontalPanel()
.add(searchFilter)
.add(searchDesc)
.setSpacing(15)
)
.add(uiApp.createHorizontalPanel()
.add(tableChart).setBorderWidth(1).setHorizontalAlignment(UiApp.HorizontalAlignment.CENTER).setWidth(anchoTotal)
)
);
uiApp.add(dashboard);
return uiApp;
}

Answer 1

I found it, we need to get the content of the file first with a Blob object.
This function is the one I use to parse some csv info into an array:
function parsedCSV(){
//searching the file. This gets only one file in var origen
var listaArchivos = DocsList.getFolderById('XXXXXXX').getFiles()
for (var i = 0; i < listaArchivos.length; i++) {
if (listaArchivos[i].getName() == 'baul.csv'){
var origen = listaArchivos[i];
};
}
// HERE IS THE GOOD DEFINITION OF CHAR:
var texto2= origen.getBlob().getDataAsString('ISO-8859-1');
// I put all the corrected text in an array
var arra = Utilities.parseCsv(texto2,";");
return(arra);
}
This is the solved thing: https://script.google.com/macros/s/AKfycbyHa-bLWBHBr3qifbvzxecqGgGUYX8mhyo-TKoyfGvy/exec
The trick:
var textVariableName = fileObjectVariableName.getBlob().getDataAsString('ISO-8859-1');