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| """Encode multipart form data to upload files via POST.""" | ||
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| # (c) Ben Hoyt, used under MIT: | ||
| # http://code.activestate.com/recipes/578668-encode-multipart-form-data-for-uploading-files-via/ | ||
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| from __future__ import print_function | ||
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| import mimetypes | ||
| import random | ||
| import string | ||
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| _BOUNDARY_CHARS = string.digits + string.ascii_letters | ||
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| def encode_multipart(fields, files, boundary=None): | ||
| r"""Encode dict of form fields and dict of files as multipart/form-data. | ||
| Return tuple of (body_string, headers_dict). Each value in files is a dict | ||
| with required keys 'filename' and 'content', and optional 'mimetype' (if | ||
| not specified, tries to guess mime type or uses 'application/octet-stream'). | ||
| >>> body, headers = encode_multipart({'FIELD': 'VALUE'}, | ||
| ... {'FILE': {'filename': 'F.TXT', 'content': 'CONTENT'}}, | ||
| ... boundary='BOUNDARY') | ||
| >>> print('\n'.join(repr(l) for l in body.split('\r\n'))) | ||
| '--BOUNDARY' | ||
| 'Content-Disposition: form-data; name="FIELD"' | ||
| '' | ||
| 'VALUE' | ||
| '--BOUNDARY' | ||
| 'Content-Disposition: form-data; name="FILE"; filename="F.TXT"' | ||
| 'Content-Type: text/plain' | ||
| '' | ||
| 'CONTENT' | ||
| '--BOUNDARY--' | ||
| '' | ||
| >>> print(sorted(headers.items())) | ||
| [('Content-Length', '193'), ('Content-Type', 'multipart/form-data; boundary=BOUNDARY')] | ||
| >>> len(body) | ||
| 193 | ||
| """ | ||
| def escape_quote(s): | ||
| return s.replace('"', '\\"') | ||
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| if boundary is None: | ||
| boundary = ''.join(random.choice(_BOUNDARY_CHARS) for i in range(30)) | ||
| lines = [] | ||
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| for name, value in fields.items(): | ||
| lines.extend(( | ||
| '--{0}'.format(boundary), | ||
| 'Content-Disposition: form-data; name="{0}"'.format(escape_quote(name)), | ||
| '', | ||
| str(value), | ||
| )) | ||
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| for name, value in files.items(): | ||
| filename = value['filename'] | ||
| if 'mimetype' in value: | ||
| mimetype = value['mimetype'] | ||
| else: | ||
| mimetype = mimetypes.guess_type(filename)[0] or 'application/octet-stream' | ||
| lines.extend(( | ||
| '--{0}'.format(boundary), | ||
| 'Content-Disposition: form-data; name="{0}"; filename="{1}"'.format( | ||
| escape_quote(name), escape_quote(filename)), | ||
| 'Content-Type: {0}'.format(mimetype), | ||
| '', | ||
| value['content'], | ||
| )) | ||
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| lines.extend(( | ||
| '--{0}--'.format(boundary), | ||
| '', | ||
| )) | ||
| body = '\r\n'.join(lines) | ||
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| headers = { | ||
| 'Content-Type': 'multipart/form-data; boundary={0}'.format(boundary), | ||
| 'Content-Length': str(len(body)), | ||
| } | ||
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| return (body, headers) | ||
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| if __name__ == '__main__': | ||
| import doctest | ||
| doctest.testmod() |
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