Mercurial > odfcast > odfcast
annotate 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 |
rev | line source |
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1 # -*- coding: utf-8 -*- |
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2 |
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3 import logging |
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4 import tempfile |
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5 |
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6 from flask import request, Response, json, render_template |
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7 from flask.views import MethodView |
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8 |
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9 from py3o.template import Template |
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10 |
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11 from PyPDF2 import PdfFileMerger |
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12 |
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13 log = logging.getLogger(__name__) |
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14 |
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15 ALLOWED_FORMATS = ["pdf", "doc", "docx", "odt"] |
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16 |
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17 PDF_MIMETYPE = "application/pdf" |
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18 |
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19 MIMETYPES = { |
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20 "odt": "application/vnd.oasis.opendocument.text", |
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21 "doc": "application/msword", |
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22 "docx": "application/vnd.openxmlformats-officedocument" |
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23 ".wordprocessingml.document", |
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24 "pdf": PDF_MIMETYPE, |
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25 } |
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26 |
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27 DEFAULT_MIMETYPE = "application/octet-stream" |
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28 |
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29 |
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30 class ConvertView(MethodView): |
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31 |
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32 def __init__(self, pyuno_driver_name="", hostname="localhost", port=2001): |
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33 driver_module = self._load_driver_module(pyuno_driver_name) |
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34 self.convertor = driver_module.Convertor(hostname, port) |
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35 |
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36 def _load_driver_module(self, pyuno_driver_name): |
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37 return __import__(pyuno_driver_name, globals(), locals(), |
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38 ["Convertor"]) |
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39 |
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40 def is_format_supported(self, fformat): |
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41 return fformat and fformat.lower() in ALLOWED_FORMATS |
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42 |
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43 def post(self): |
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44 ffile = request.files['file'] |
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45 if not ffile.filename: |
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46 return "Please upload a file for conversion", 401 |
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47 |
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48 fformat = request.form['format'] |
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49 if not self.is_format_supported(fformat): |
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50 return "Format %s not allowed" % fformat, 401 |
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51 |
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52 mimetype = self.get_mimetype_for_format(fformat) |
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53 |
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54 infile = self.save_form_file(ffile) |
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55 try: |
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56 outfile = self.convert(infile, fformat) |
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57 except: |
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58 log.exception("Conversion error") |
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59 return "Conversion error", 500 |
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60 |
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61 return Response(outfile, mimetype=mimetype) |
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62 |
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63 def get(self): |
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64 return render_template("convert.html") |
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65 |
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66 def save_form_file(self, infile): |
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67 outfile = tempfile.NamedTemporaryFile() |
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68 infile.save(outfile.name) |
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69 return outfile |
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70 |
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71 def convert(self, infile, fformat): |
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72 outfile = tempfile.NamedTemporaryFile() |
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73 |
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74 self.convertor.convert(infile.name, outfile.name, fformat) |
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75 |
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76 infile.close() |
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77 return outfile |
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78 |
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79 def get_mimetype_for_format(self, fformat): |
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80 return MIMETYPES.get(fformat, DEFAULT_MIMETYPE) |
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81 |
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82 |
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83 class TemplateConvertView(ConvertView): |
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84 |
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85 def post(self): |
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86 ffile = request.files['file'] |
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87 fformat = request.form['format'] |
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88 datadict = self.get_datadict() |
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89 |
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90 if not self.is_format_supported(fformat): |
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91 return "Format %s not allowed" % fformat, 401 |
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92 |
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93 tfile = self.save_form_file(ffile) |
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94 outfile = tempfile.NamedTemporaryFile() |
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95 t = Template(tfile, outfile.name) |
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96 t.render(datadict) |
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97 |
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98 if fformat != "odt": |
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99 outfile = self.convert(outfile, fformat) |
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100 |
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101 mimetype = self.get_mimetype_for_format(fformat) |
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102 return Response(outfile, mimetype=mimetype) |
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103 |
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104 def get_datadict(self): |
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105 vars = request.form['datadict'] |
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106 return json.loads(vars) |
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107 |
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108 def get(self): |
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109 return render_template("template_convert.html") |
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110 |
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111 |
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112 class MergeView(MethodView): |
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113 |
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114 def get(self): |
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115 return render_template("merge.html") |
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116 |
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117 def post(self): |
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118 merger = PdfFileMerger() |
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119 ffiles = request.files.getlist('files') |
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120 |
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121 for ffile in ffiles: |
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122 merger.append(ffile) |
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123 |
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124 outfile = tempfile.NamedTemporaryFile() |
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125 |
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126 merger.write(outfile.name) |
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127 |
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128 merger.close() |
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129 return Response(outfile, mimetype=PDF_MIMETYPE) |
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130 |
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131 |
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132 class TemplateView(MethodView): |
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133 |
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134 template_name = "" |
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135 |
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136 def __init__(self, template_name=None): |
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137 if template_name: |
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138 self.template_name = template_name |
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139 |
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140 def get_template_name(self): |
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141 return self.template_name |
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142 |
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143 def get(self): |
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144 return render_template(self.get_template_name()) |