This is how you export a csv file and get the browser to recognize that its a csv file and popups the download window with web.py. Lets say we have a database with a table called users and you want to create a csv file that contains all the users with their names and id’s here is how you do it.
1class export:2 def GET(self):3 i = web.input()4 users = web.select(’users’, vars=locals())5 csv = 6 csv.append(”id,name\n“)7 for user in users:8 row = 9 row.append(user.id)10 row.append(user.name)11 csv.append(”,“.join(row))1213 web.header(’Content-Type’,’text/csv‘)14 web.header(’Content-disposition’, ’attachment; filename=export.csv‘)15 print "".join(csv)16 return
I export the csv file in a GET method of a class called export which i map in the urls list to ‘/export’,‘export’
A quick breakdown, do a database query and iterate over the IterBetter object create a row and appending a comma seperated string to the csv list. Then at the end you send the appropirate HTTP headers , the first telling the type of the file and the second setting the filename and extension.