Mercurial > odfcast > odfcast
view odfcast/convert.py @ 29:1dadc59c4b9a
Make the conversion more error prone
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Thu, 16 Oct 2014 10:03:32 +0200 |
parents | 0e40926735e1 |
children | 9d65de2ebe22 |
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# -*- coding: utf-8 -*- import logging import tempfile from flask import request, Response, json, render_template from flask.views import MethodView from py3o.template import Template from PyPDF2 import PdfFileMerger log = logging.getLogger(__name__) ALLOWED_FORMATS = ["pdf", "doc", "docx", "odt"] PDF_MIMETYPE = "application/pdf" MIMETYPES = { "odt": "application/vnd.oasis.opendocument.text", "doc": "application/msword", "docx": "application/vnd.openxmlformats-officedocument" ".wordprocessingml.document", "pdf": PDF_MIMETYPE, } DEFAULT_MIMETYPE = "application/octet-stream" class ConvertView(MethodView): def __init__(self, pyuno_driver_name="", hostname="localhost", port=2001): driver_module = self._load_driver_module(pyuno_driver_name) self.convertor = driver_module.Convertor(hostname, port) def _load_driver_module(self, pyuno_driver_name): return __import__(pyuno_driver_name, globals(), locals(), ["Convertor"]) def is_format_supported(self, fformat): return fformat and fformat.lower() in ALLOWED_FORMATS def post(self): ffile = request.files['file'] if not ffile.filename: return "Please upload a file for conversion", 401 fformat = request.form['format'] if not self.is_format_supported(fformat): return "Format %s not allowed" % fformat, 401 mimetype = self.get_mimetype_for_format(fformat) infile = self.save_form_file(ffile) try: outfile = self.convert(infile, fformat) except: log.exception("Conversion error") return "Conversion error", 500 return Response(outfile, mimetype=mimetype) def get(self): return render_template("convert.html") def save_form_file(self, infile): outfile = tempfile.NamedTemporaryFile() infile.save(outfile.name) return outfile def convert(self, infile, fformat): outfile = tempfile.NamedTemporaryFile() self.convertor.convert(infile.name, outfile.name, fformat) infile.close() return outfile def get_mimetype_for_format(self, fformat): return MIMETYPES.get(fformat, DEFAULT_MIMETYPE) class TemplateConvertView(ConvertView): def post(self): ffile = request.files['file'] fformat = request.form['format'] datadict = self.get_datadict() if not self.is_format_supported(fformat): return "Format %s not allowed" % fformat, 401 tfile = self.save_form_file(ffile) outfile = tempfile.NamedTemporaryFile() t = Template(tfile, outfile.name) t.render(datadict) if fformat != "odt": outfile = self.convert(outfile, fformat) mimetype = self.get_mimetype_for_format(fformat) return Response(outfile, mimetype=mimetype) def get_datadict(self): vars = request.form['datadict'] return json.loads(vars) def get(self): return render_template("template_convert.html") class MergeView(MethodView): def get(self): return render_template("merge.html") def post(self): merger = PdfFileMerger() ffiles = request.files.getlist('files') for ffile in ffiles: merger.append(ffile) outfile = tempfile.NamedTemporaryFile() merger.write(outfile.name) merger.close() return Response(outfile, mimetype=PDF_MIMETYPE) class TemplateView(MethodView): template_name = "" def __init__(self, template_name=None): if template_name: self.template_name = template_name def get_template_name(self): return self.template_name def get(self): return render_template(self.get_template_name())