Mercurial > odfcast > odfcast

annotate odfcast/convert.py @ 85:c018570c1a2d 1.2

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author Frank Koormann <frank.koormann@intevation.de>
date Thu, 02 Apr 2015 15:45:55 +0200
parents 3492c79d83c8
children 4f45ebecb057
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 from PyPDF2.utils import PyPdfError
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14 from werkzeug.utils import escape
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16 log = logging.getLogger(__name__)
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17
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18 ALLOWED_FORMATS = ["pdf", "doc", "docx", "odt"]
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19
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20 PDF_MIMETYPE = "application/pdf"
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21 JSON_MIMETYPE = "application/json"
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22 HTML_MIMETYPE = "text/html"
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23
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24 MIMETYPES = {
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25 "odt": "application/vnd.oasis.opendocument.text",
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26 "doc": "application/msword",
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27 "docx": "application/vnd.openxmlformats-officedocument"
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28 ".wordprocessingml.document",
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29 "pdf": PDF_MIMETYPE,
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30 }
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31
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32 DEFAULT_MIMETYPE = "application/octet-stream"
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33
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35 class ErrorResponse(Response):
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36
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37 BAD_REQUEST_ERROR_CODE = 400
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38
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39 def __init__(self, title, error_code, details,
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40 html_error_code=BAD_REQUEST_ERROR_CODE):
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41 data, mime_type = self.get_response_data(title, error_code, details)
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42 super(ErrorResponse, self).__init__(response=data, mimetype=mime_type,
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43 status=html_error_code)
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44
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45 def json(self, title, error_code, details):
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46 return json.dumps({
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47 "error": title,
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48 "error_code": error_code,
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49 "details": details,
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50 }), JSON_MIMETYPE
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51
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52 def html(self, title, error_code, details):
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53 data = (
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54 u'<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">\n'
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55 u'<title>%(code)s %(name)s</title>\n'
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56 u'<h1>%(name)s</h1>\n'
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57 u'%(details)s\n'
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58 ) % {
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59 "code": error_code,
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60 "name": escape(title),
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61 "details": escape(details),
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62 }
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63 return data, HTML_MIMETYPE
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64
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65 def get_response_data(self, title, error_code, details):
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66 if self.is_wants_json():
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67 return self.json(title, error_code, details)
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68 return self.html(title, error_code, details)
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69
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70 def is_wants_json(self):
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71 best = request.accept_mimetypes.best_match([JSON_MIMETYPE,
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72 HTML_MIMETYPE])
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73 return best == JSON_MIMETYPE and \
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74 request.accept_mimetypes[best] > \
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75 request.accept_mimetypes[HTML_MIMETYPE]
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78 class TemplateErrorResponse(ErrorResponse):
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80 TEMPLATE_ERROR_CODE = 100
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81
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82 def __init__(self, details, error_code=TEMPLATE_ERROR_CODE):
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83 super(TemplateErrorResponse, self).__init__(
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84 title="TemplateError", error_code=error_code, details=details,
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85 html_error_code=500)
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88 class ConversionErrorResponse(ErrorResponse):
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89
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90 CONVERSION_ERROR_CODE = 200
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92 def __init__(self, details, error_code=CONVERSION_ERROR_CODE):
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93 super(ConversionErrorResponse, self).__init__(
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94 title="ConversionError", error_code=error_code, details=details,
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95 html_error_code=500)
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98 class MergeErrorResponse(ErrorResponse):
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99
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100 MERGE_ERROR_CODE = 300
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101
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102 def __init__(self, details, error_code=MERGE_ERROR_CODE):
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103 super(MergeErrorResponse, self).__init__(
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104 title="MergeError", error_code=error_code, details=details,
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105 html_error_code=500)
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107
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108 class ConvertView(MethodView):
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109
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110 def __init__(self, pyuno_driver_name="", hostname="localhost", port=2001):
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111 driver_module = self._load_driver_module(pyuno_driver_name)
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112 self.convertor = driver_module.Convertor(hostname, port)
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113
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114 def _load_driver_module(self, pyuno_driver_name):
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115 return __import__(pyuno_driver_name, globals(), locals(),
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116 ["Convertor"])
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117
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118 def is_format_supported(self, fformat):
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119 return fformat and fformat.lower() in ALLOWED_FORMATS
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120
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121 def post(self):
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122 log.debug("Converting document")
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123 ffile = request.files['file']
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124 if not ffile.filename:
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125 return ErrorResponse(
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126 "Upload file missing", error_code=101,
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127 details="Please upload a file for conversion",
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128 html_error_code=400)
29
1dadc59c4b9a Make the conversion more error prone
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parents: 22
diff changeset
129
3
15807d87930c Refactor ConvertView to be easier reusable
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parents: 0
diff changeset
130 fformat = request.form['format']
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parents: 0
diff changeset
131 if not self.is_format_supported(fformat):
47
e99cbb47eafb Improve error handling by returning flask/werkzeug responses directly on errors
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parents: 42
diff changeset
132 return ErrorResponse(
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parents: 42
diff changeset
133 "Invalid format", error_code=102,
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diff changeset
134 details="Format %s not allowed" % fformat,
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parents: 42
diff changeset
135 html_error_code=400)
3
15807d87930c Refactor ConvertView to be easier reusable
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parents: 0
diff changeset
136
30
9d65de2ebe22 Merge TemplateConvertView into ConvertView
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parents: 29
diff changeset
137 datadict = self.get_datadict()
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parents: 29
diff changeset
138
84
3492c79d83c8 Log convert activity.
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parents: 73
diff changeset
139 if datadict:
3492c79d83c8 Log convert activity.
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parents: 73
diff changeset
140 log.debug(" with datadict")
3492c79d83c8 Log convert activity.
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parents: 73
diff changeset
141
29
1dadc59c4b9a Make the conversion more error prone
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parents: 22
diff changeset
142 mimetype = self.get_mimetype_for_format(fformat)
1dadc59c4b9a Make the conversion more error prone
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parents: 22
diff changeset
143
84
3492c79d83c8 Log convert activity.
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parents: 73
diff changeset
144 log.debug(" to %s" % fformat)
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parents: 73
diff changeset
145
30
9d65de2ebe22 Merge TemplateConvertView into ConvertView
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parents: 29
diff changeset
146 outfile = self.save_form_file(ffile)
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parents: 29
diff changeset
147
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parents: 29
diff changeset
148 if datadict:
31
83bca7dc9bfe Return error response when a template couldn't be rendered
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parents: 30
diff changeset
149 try:
83bca7dc9bfe Return error response when a template couldn't be rendered
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diff changeset
150 tfile = tempfile.NamedTemporaryFile()
42
6d511e93a331 Return requested format when an error has occured
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parents: 41
diff changeset
151 t = Template(outfile, tfile, ignore_undefined_variables=True)
31
83bca7dc9bfe Return error response when a template couldn't be rendered
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parents: 30
diff changeset
152 t.render(datadict)
83bca7dc9bfe Return error response when a template couldn't be rendered
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parents: 30
diff changeset
153 outfile.close()
83bca7dc9bfe Return error response when a template couldn't be rendered
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parents: 30
diff changeset
154 outfile = tfile
42
6d511e93a331 Return requested format when an error has occured
Björn Ricks <bjoern.ricks@intevation.de>
parents: 41
diff changeset
155 except Exception, e:
41
a1100ec32be2 Log exception on rendering errors
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parents: 34
diff changeset
156 log.exception("Template error")
47
e99cbb47eafb Improve error handling by returning flask/werkzeug responses directly on errors
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parents: 42
diff changeset
157 return TemplateErrorResponse(details=str(e))
30
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158
32
e6f2f1481de2 Fix we must check the fformat variable
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parents: 31
diff changeset
159 if fformat != "odt":
30
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parents: 29
diff changeset
160 try:
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parents: 29
diff changeset
161 outfile = self.convert(outfile, fformat)
42
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parents: 41
diff changeset
162 except Exception, e:
30
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parents: 29
diff changeset
163 log.exception("Conversion error")
47
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parents: 42
diff changeset
164 return ConversionErrorResponse(details=str(e))
29
1dadc59c4b9a Make the conversion more error prone
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parents: 22
diff changeset
165
84
3492c79d83c8 Log convert activity.
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diff changeset
166 log.debug("Document converted")
0
4a34f72f036b Add initial conversion service
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parents:
diff changeset
167 return Response(outfile, mimetype=mimetype)
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parents:
diff changeset
168
16
f4920ab1d27c Add basic html interface for convert
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169 def get(self):
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parents: 4
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170 return render_template("convert.html")
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171
3
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parents: 0
diff changeset
172 def save_form_file(self, infile):
33
00e12392f8d4 Fix saving uploaded form file to a temporary file
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parents: 32
diff changeset
173 outfile = tempfile.NamedTemporaryFile()
30
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diff changeset
174 infile.save(outfile)
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175 infile.close()
33
00e12392f8d4 Fix saving uploaded form file to a temporary file
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parents: 32
diff changeset
176 outfile.seek(0)
3
15807d87930c Refactor ConvertView to be easier reusable
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parents: 0
diff changeset
177 return outfile
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parents: 0
diff changeset
178
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parents: 0
diff changeset
179 def convert(self, infile, fformat):
0
4a34f72f036b Add initial conversion service
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parents:
diff changeset
180 outfile = tempfile.NamedTemporaryFile()
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parents:
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181
3
15807d87930c Refactor ConvertView to be easier reusable
Björn Ricks <bjoern.ricks@intevation.de>
parents: 0
diff changeset
182 self.convertor.convert(infile.name, outfile.name, fformat)
0
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parents:
diff changeset
183
4a34f72f036b Add initial conversion service
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parents:
diff changeset
184 infile.close()
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parents:
diff changeset
185 return outfile
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parents:
diff changeset
186
3
15807d87930c Refactor ConvertView to be easier reusable
Björn Ricks <bjoern.ricks@intevation.de>
parents: 0
diff changeset
187 def get_mimetype_for_format(self, fformat):
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parents: 0
diff changeset
188 return MIMETYPES.get(fformat, DEFAULT_MIMETYPE)
4
46f31348fe01 Implement a TemplateConvertView to allow convert odt templates with variable
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3
diff changeset
189
46f31348fe01 Implement a TemplateConvertView to allow convert odt templates with variable
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3
diff changeset
190 def get_datadict(self):
34
89ffa12bd48d Allow to not passing any datadict to the conversion form
Björn Ricks <bjoern.ricks@intevation.de>
parents: 33
diff changeset
191 vars = request.form.get('datadict')
30
9d65de2ebe22 Merge TemplateConvertView into ConvertView
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parents: 29
diff changeset
192 if not vars:
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diff changeset
193 return None
4
46f31348fe01 Implement a TemplateConvertView to allow convert odt templates with variable
Björn Ricks <bjoern.ricks@intevation.de>
parents: 3
diff changeset
194 return json.loads(vars)
18
585904e7411a Add html for converting a odf with a template
Björn Ricks <bjoern.ricks@intevation.de>
parents: 16
diff changeset
195
19
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
Björn Ricks <bjoern.ricks@intevation.de>
parents: 18
diff changeset
196
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
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parents: 18
diff changeset
197 class MergeView(MethodView):
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198
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diff changeset
199 def get(self):
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parents: 18
diff changeset
200 return render_template("merge.html")
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
Björn Ricks <bjoern.ricks@intevation.de>
parents: 18
diff changeset
201
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
Björn Ricks <bjoern.ricks@intevation.de>
parents: 18
diff changeset
202 def post(self):
57
423f99732a80 Add some debug output for merging pdfs
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parents: 54
diff changeset
203 log.debug("Merging PDF documents")
423f99732a80 Add some debug output for merging pdfs
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parents: 54
diff changeset
204
19
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
Björn Ricks <bjoern.ricks@intevation.de>
parents: 18
diff changeset
205 merger = PdfFileMerger()
67
5d1e486140ae Support merging of pdf documents with different names in the uploaded data
Björn Ricks <bjoern.ricks@intevation.de>
parents: 62
diff changeset
206
5d1e486140ae Support merging of pdf documents with different names in the uploaded data
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parents: 62
diff changeset
207 ffiles = []
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parents: 62
diff changeset
208
5d1e486140ae Support merging of pdf documents with different names in the uploaded data
Björn Ricks <bjoern.ricks@intevation.de>
parents: 62
diff changeset
209 # allow files to have arbitray form names
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parents: 62
diff changeset
210 # order files by their form names
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parents: 62
diff changeset
211 for key, value in sorted(request.files.iterlists(),
5d1e486140ae Support merging of pdf documents with different names in the uploaded data
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parents: 62
diff changeset
212 key=lambda x: x[0].lower()):
5d1e486140ae Support merging of pdf documents with different names in the uploaded data
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parents: 62
diff changeset
213 ffiles.extend(value)
19
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
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parents: 18
diff changeset
214
62
16352bd395fa Allow to ignore merge errors on files
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parents: 61
diff changeset
215 for ffile in ffiles:
16352bd395fa Allow to ignore merge errors on files
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parents: 61
diff changeset
216 try:
85
c018570c1a2d Ignore existing Bookmarks when merging documemts
Frank Koormann <frank.koormann@intevation.de>
parents: 84
diff changeset
217 merger.append(ffile, import_bookmarks=False)
62
16352bd395fa Allow to ignore merge errors on files
Björn Ricks <bjoern.ricks@intevation.de>
parents: 61
diff changeset
218 except Exception, e:
16352bd395fa Allow to ignore merge errors on files
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parents: 61
diff changeset
219 log.exception("Error merging file %s" % ffile)
16352bd395fa Allow to ignore merge errors on files
Björn Ricks <bjoern.ricks@intevation.de>
parents: 61
diff changeset
220 if self.is_ignore_file_errors():
16352bd395fa Allow to ignore merge errors on files
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parents: 61
diff changeset
221 continue
16352bd395fa Allow to ignore merge errors on files
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parents: 61
diff changeset
222 else:
16352bd395fa Allow to ignore merge errors on files
Björn Ricks <bjoern.ricks@intevation.de>
parents: 61
diff changeset
223 return MergeErrorResponse(details=str(e))
19
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
Björn Ricks <bjoern.ricks@intevation.de>
parents: 18
diff changeset
224
62
16352bd395fa Allow to ignore merge errors on files
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parents: 61
diff changeset
225 outfile = tempfile.NamedTemporaryFile()
19
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
Björn Ricks <bjoern.ricks@intevation.de>
parents: 18
diff changeset
226
62
16352bd395fa Allow to ignore merge errors on files
Björn Ricks <bjoern.ricks@intevation.de>
parents: 61
diff changeset
227 try:
61
d8fc52aceb9c Handle errors during merge of pdf documents
Björn Ricks <bjoern.ricks@intevation.de>
parents: 60
diff changeset
228 merger.write(outfile)
d8fc52aceb9c Handle errors during merge of pdf documents
Björn Ricks <bjoern.ricks@intevation.de>
parents: 60
diff changeset
229 merger.close()
d8fc52aceb9c Handle errors during merge of pdf documents
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parents: 60
diff changeset
230 outfile.seek(0)
d8fc52aceb9c Handle errors during merge of pdf documents
Björn Ricks <bjoern.ricks@intevation.de>
parents: 60
diff changeset
231 except PyPdfError, e:
d8fc52aceb9c Handle errors during merge of pdf documents
Björn Ricks <bjoern.ricks@intevation.de>
parents: 60
diff changeset
232 log.exception("Merge error")
d8fc52aceb9c Handle errors during merge of pdf documents
Björn Ricks <bjoern.ricks@intevation.de>
parents: 60
diff changeset
233 return MergeErrorResponse(details=str(e))
19
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
Björn Ricks <bjoern.ricks@intevation.de>
parents: 18
diff changeset
234
57
423f99732a80 Add some debug output for merging pdfs
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parents: 54
diff changeset
235 log.debug("PDF documents merged")
19
2f627039d2b4 Add a MergeView to merge pdfs based on PyPDF2
Björn Ricks <bjoern.ricks@intevation.de>
parents: 18
diff changeset
236 return Response(outfile, mimetype=PDF_MIMETYPE)
22
0e40926735e1 Add a generic View to display a template for a get request
Björn Ricks <bjoern.ricks@intevation.de>
parents: 19
diff changeset
237
62
16352bd395fa Allow to ignore merge errors on files
Björn Ricks <bjoern.ricks@intevation.de>
parents: 61
diff changeset
238 def is_ignore_file_errors(self):
16352bd395fa Allow to ignore merge errors on files
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parents: 61
diff changeset
239 return request.args.get("ignore_file_errors", False) or \
16352bd395fa Allow to ignore merge errors on files
Björn Ricks <bjoern.ricks@intevation.de>
parents: 61
diff changeset
240 request.form.get("ignore_file_errors", False)
16352bd395fa Allow to ignore merge errors on files
Björn Ricks <bjoern.ricks@intevation.de>
parents: 61
diff changeset
241
73
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
242 class CheckView(MethodView):
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
243
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
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parents: 67
diff changeset
244 def get(self):
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
245 return render_template("check.html")
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
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parents: 67
diff changeset
246
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
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parents: 67
diff changeset
247 def post(self):
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
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diff changeset
248 log.debug("Checking a PDF document's readiness for merging")
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
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parents: 67
diff changeset
249
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
250 merger = PdfFileMerger()
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
251
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
252 ffile = request.files['file']
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
253 if not ffile.filename:
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
254 return ErrorResponse(
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
255 "Upload file missing", error_code=101,
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
256 details="Please upload a file for conversion",
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
257 html_error_code=400)
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
258
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
259 try:
85
c018570c1a2d Ignore existing Bookmarks when merging documemts
Frank Koormann <frank.koormann@intevation.de>
parents: 84
diff changeset
260 merger.append(ffile, import_bookmarks=False)
73
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
261 except Exception, e:
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
262 log.exception("Error merging file %s" % ffile)
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
263 return MergeErrorResponse(details=str(e))
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
264
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
diff changeset
265 merger.close()
02efda1f6919 issue5117: service for checking a pdf for merging readiness added.
Bernhard Reiter <bernhard@intevation.de>
parents: 67
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266
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267 log.debug("PDF document %s checked." % ffile)
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268 return Response("Okay.")
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269
22
0e40926735e1 Add a generic View to display a template for a get request
Björn Ricks <bjoern.ricks@intevation.de>
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270
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271 class TemplateView(MethodView):
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272
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273 template_name = ""
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274
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275 def __init__(self, template_name=None):
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276 if template_name:
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parents: 19
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277 self.template_name = template_name
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parents: 19
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278
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parents: 19
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279 def get_template_name(self):
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280 return self.template_name
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281
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282 def get(self):
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parents: 19
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283 return render_template(self.get_template_name())
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