After an answer on another recent post (Thomas van Latum), I tried the suggested doc api and get an interesting result... here is the test code I used and that is working nicely except the file is in xlsx format, not in xls but this is not necessarily an issue these days :
function googleOAuth_(name,scope) {
var oAuthConfig = UrlFetchApp.addOAuthService(name);
oAuthConfig.setRequestTokenUrl("https://www.google.com/accounts/OAuthGetRequestToken?scope="+scope);
oAuthConfig.setAuthorizationUrl("https://www.google.com/accounts/OAuthAuthorizeToken");
oAuthConfig.setAccessTokenUrl("https://www.google.com/accounts/OAuthGetAccessToken");
oAuthConfig.setConsumerKey('anonymous');
oAuthConfig.setConsumerSecret('anonymous');
return {oAuthServiceName:name, oAuthUseToken:"always"};
}
function test(){
var id = 'spreadsheet_ID'
var url = 'https://docs.google.com/feeds/';
var doc = UrlFetchApp.fetch(url+'download/spreadsheets/Export?key='+id+'&exportFormat=xls',
googleOAuth_('docs',url)).getBlob()
DocsList.createFile(doc).rename('newfile.xls')
}
note : if you don't rename it, its default name is Export.xlsx
, it might be more usefull to get its ID to use it later...
so the last line could be like this instead :
var xlsfileID = DocsList.createFile(doc).getId()
EDIT : to trigger the authorization process, try a small function like this, run it from the script editor
function autorise(){
// function to call to authorize googleOauth
var id=SpreadsheetApp.getActiveSpreadsheet().getId();
var url = 'https://docs.google.com/feeds/';
var doc = UrlFetchApp.fetch(url+'download/documents/Export?exportFormat=html&format=html&id='+id,
googleOAuth_('docs',url)).getContentText();
}