108 lines
3.3 KiB
Python
108 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
|
|
# vi:si:et:sw=4:sts=4:ts=4
|
|
# GPL 2014
|
|
from __future__ import with_statement, print_function
|
|
|
|
import itertools
|
|
import mimetypes
|
|
import random
|
|
import sys
|
|
|
|
from six import PY2
|
|
|
|
|
|
__all__ = ['MultiPartForm']
|
|
|
|
# from /usr/lib/python3.4/email/generator.py
|
|
# Helper used by Generator._make_boundary
|
|
_width = len(repr(sys.maxsize-1))
|
|
_fmt = '%%0%dd' % _width
|
|
|
|
def _make_boundary():
|
|
# Craft a random boundary.
|
|
token = random.randrange(sys.maxsize)
|
|
boundary = ('=' * 15) + (_fmt % token) + '=='
|
|
return boundary
|
|
|
|
class MultiPartForm(object):
|
|
"""Accumulate the data to be used when posting a form."""
|
|
|
|
def __init__(self):
|
|
self.form_fields = []
|
|
self.files = []
|
|
self.boundary = _make_boundary()
|
|
return
|
|
|
|
def get_content_type(self):
|
|
return 'multipart/form-data; boundary=%s' % self.boundary
|
|
|
|
def add_field(self, name, value):
|
|
"""Add a simple field to the form data."""
|
|
if isinstance(name, bytes):
|
|
name = name.decode('utf-8')
|
|
if isinstance(value, bytes):
|
|
value = value.decode('utf-8')
|
|
self.form_fields.append((name, value))
|
|
return
|
|
|
|
def add_file(self, fieldname, filename, fileHandle, mimetype=None):
|
|
"""Add a file to be uploaded."""
|
|
if isinstance(fieldname, bytes):
|
|
fieldname = fieldname.decode('utf-8')
|
|
if isinstance(filename, bytes):
|
|
filename = filename.decode('utf-8')
|
|
|
|
if hasattr(fileHandle, 'read'):
|
|
body = fileHandle.read()
|
|
else:
|
|
body = fileHandle
|
|
if mimetype is None:
|
|
mimetype = mimetypes.guess_type(filename)[0] or 'application/octet-stream'
|
|
self.files.append((fieldname, filename, mimetype, body))
|
|
return
|
|
|
|
def __str__(self):
|
|
body = self.body()
|
|
if not PY2:
|
|
body = body.decode('utf-8')
|
|
return body
|
|
|
|
def body(self):
|
|
"""Return a string representing the form data, including attached files."""
|
|
# Build a list of lists, each containing "lines" of the
|
|
# request. Each part is separated by a boundary string.
|
|
# Once the list is built, return a string where each
|
|
# line is separated by '\r\n'.
|
|
parts = []
|
|
part_boundary = '--' + self.boundary
|
|
|
|
# Add the form fields
|
|
parts.extend(
|
|
[ part_boundary,
|
|
'Content-Disposition: form-data; name="%s"' % name,
|
|
'',
|
|
value,
|
|
]
|
|
for name, value in self.form_fields
|
|
)
|
|
|
|
# Add the files to upload
|
|
parts.extend(
|
|
[ part_boundary,
|
|
'Content-Disposition: file; name="%s"; filename="%s"' % \
|
|
(field_name, filename),
|
|
'Content-Type: %s' % content_type,
|
|
'',
|
|
body,
|
|
]
|
|
for field_name, filename, content_type, body in self.files
|
|
)
|
|
|
|
# Flatten the list and add closing boundary marker,
|
|
# then return CR+LF separated data
|
|
flattened = list(itertools.chain(*parts))
|
|
flattened.append('--' + self.boundary + '--')
|
|
flattened.append('')
|
|
flattened = [part if isinstance(part, bytes) else part.encode('utf-8') for part in flattened]
|
|
return b'\r\n'.join(flattened)
|
|
|