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annotate tests/multipart.py @ 71:dcb98ad8463e

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add a convenience script to post the mozbase packages; should be converted to a test
author Jeff Hammel <jhammel@mozilla.com>
date Fri, 02 Mar 2012 11:29:57 -0800
parents bb8d993376aa
children
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1 """
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2 from
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3 http://www.doughellmann.com/PyMOTW/urllib2/#uploading-files
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4
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5 Very very sad that python2 stdlib doesn't have this
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6 """
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7
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8 import itertools
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9 import mimetools
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10 import mimetypes
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11 import os
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12 import urllib
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13 import urllib2
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14 from cStringIO import StringIO
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15
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16 class MultiPartForm(object):
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17 """Accumulate the data to be used when posting a form."""
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18
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19 def __init__(self):
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20 self.form_fields = []
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21 self.files = []
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22 self.boundary = mimetools.choose_boundary()
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23
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24 def get_content_type(self):
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25 return 'multipart/form-data; boundary=%s' % self.boundary
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26
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27 def add_field(self, name, value):
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28 """Add a simple field to the form data."""
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29 self.form_fields.append((name, value))
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30
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31 def add_file(self, fieldname, path, mimetype=None):
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32 filename = os.path.basename(path)
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33 f = file(path)
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34 self.add_file_obj(fieldname, filename, f, mimetype)
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35 f.close()
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36
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37 def add_file_obj(self, fieldname, filename, fileHandle, mimetype=None):
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38 """Add a file object to be uploaded."""
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39 body = fileHandle.read()
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40 if mimetype is None:
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41 mimetype = mimetypes.guess_type(filename)[0] or 'application/octet-stream'
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42 self.files.append((fieldname, filename, mimetype, body))
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43
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44 def post(self, url):
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45 request = urllib2.Request(url)
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46 body = str(self)
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47 request.add_header('Content-type', self.get_content_type())
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48 request.add_header('Content-length', len(body))
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49 request.add_data(body)
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50 return urllib2.urlopen(request)
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51
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52 def __str__(self):
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53 """Return a string representing the form data, including attached files."""
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54 # Build a list of lists, each containing "lines" of the
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55 # request. Each part is separated by a boundary string.
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56 # Once the list is built, return a string where each
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57 # line is separated by '\r\n'.
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58 parts = []
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59 part_boundary = '--' + self.boundary
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60
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61 # Add the form fields
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62 parts.extend(
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63 [ part_boundary,
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64 'Content-Disposition: form-data; name="%s"' % name,
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65 '',
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66 value,
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67 ]
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68 for name, value in self.form_fields
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69 )
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70
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71 # Add the files to upload
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72 parts.extend(
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73 [ part_boundary,
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74 'Content-Disposition: file; name="%s"; filename="%s"' % \
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75 (field_name, filename),
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76 'Content-Type: %s' % content_type,
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77 '',
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78 body,
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79 ]
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80 for field_name, filename, content_type, body in self.files
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81 )
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82
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83 # Flatten the list and add closing boundary marker,
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84 # then return CR+LF separated data
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85 flattened = list(itertools.chain(*parts))
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86 flattened.append('--' + self.boundary + '--')
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87 flattened.append('')
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88 return '\r\n'.join(flattened)