mirror of
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69 lines
2.3 KiB
Python
69 lines
2.3 KiB
Python
# coding=utf-8
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# code copied from http://www.doughellmann.com/PyMOTW/urllib2/
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from email.generator import _make_boundary as make_boundary
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import itertools
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import mimetypes
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class MultiPartForm(object):
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"""Accumulate the data to be used when posting a form."""
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def __init__(self):
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self.form_fields = []
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self.files = []
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self.boundary = make_boundary()
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return
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def get_content_type(self):
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return 'multipart/form-data; boundary={0}'.format(self.boundary)
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def add_field(self, name, value):
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"""Add a simple field to the form data."""
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self.form_fields.append((name, value))
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return
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def add_file(self, fieldname, filename, fileHandle, mimetype=None):
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"""Add a file to be uploaded."""
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body = fileHandle.read()
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if mimetype is None:
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mimetype = mimetypes.guess_type(filename)[0] or 'application/octet-stream'
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self.files.append((fieldname, filename, mimetype, body))
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return
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def __str__(self):
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"""Return a string representing the form data, including attached files."""
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# Build a list of lists, each containing "lines" of the
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# request. Each part is separated by a boundary string.
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# Once the list is built, return a string where each
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# line is separated by '\r\n'.
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parts = []
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part_boundary = '--{boundary}'.format(boundary=self.boundary)
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# Add the form fields
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parts.extend(
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[part_boundary,
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'Content-Disposition: form-data; name="{0}"'.format(name),
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'',
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value,
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]
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for name, value in self.form_fields
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)
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# Add the files to upload
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parts.extend(
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[part_boundary,
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'Content-Disposition: file; name="{0}"; filename="{1}"'.format(field_name, filename),
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'Content-Type: {0}'.format(content_type),
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'',
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body,
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]
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for field_name, filename, content_type, body in self.files
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)
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# Flatten the list and add closing boundary marker,
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# then return CR+LF separated data
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flattened = list(itertools.chain(*parts))
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flattened.append('--{boundary}--'.format(boundary=self.boundary))
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flattened.append('')
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return '\r\n'.join(flattened)
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