csv-download-scaffold.py

import csv
import io

class CsvDownloadHandler(handlers.BaseAjaxHandler):

    # TODO, POST instead of GET to avoid XSSI prefixes
    def get(self):
        self.response.headers['Content-Type'] = 'application/csv'
        self.response.headers["Content-Disposition"] = 'attachment; filename="%s"' % 'all-sessions.csv'

        # Build a string buffer
        output = io.BytesIO()

        # Write the CSV into the string buffer
        writer = csv.writer(output)
        writer.writerow(['foo','foo,bar', 'bar'])
        writer.writerow(['foo','foo,bar', 'bar'])
        writer.writerow(['foo','foo,bar', 'bar'])

        # Write to the output stream
        self._RawWrite(output.getvalue())