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mylar/lib/MultipartPostHandler.py

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Python
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#!/usr/bin/python
####
# 06/2010 Nic Wolfe <nic@wolfeden.ca>
# 02/2006 Will Holcomb <wholcomb@gmail.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
import urllib
import urllib2
import mimetools, mimetypes
import os, sys
# Controls how sequences are uncoded. If true, elements may be given multiple values by
# assigning a sequence.
doseq = 1
class MultipartPostHandler(urllib2.BaseHandler):
handler_order = urllib2.HTTPHandler.handler_order - 10 # needs to run first
def http_request(self, request):
data = request.get_data()
if data is not None and type(data) != str:
v_files = []
v_vars = []
try:
for(key, value) in data.items():
if type(value) in (file, list, tuple):
v_files.append((key, value))
else:
v_vars.append((key, value))
except TypeError:
systype, value, traceback = sys.exc_info()
raise TypeError, "not a valid non-string sequence or mapping object", traceback
if len(v_files) == 0:
data = urllib.urlencode(v_vars, doseq)
else:
boundary, data = MultipartPostHandler.multipart_encode(v_vars, v_files)
contenttype = 'multipart/form-data; boundary=%s' % boundary
if(request.has_header('Content-Type')
and request.get_header('Content-Type').find('multipart/form-data') != 0):
print "Replacing %s with %s" % (request.get_header('content-type'), 'multipart/form-data')
request.add_unredirected_header('Content-Type', contenttype)
request.add_data(data)
return request
@staticmethod
def multipart_encode(vars, files, boundary = None, buffer = None):
if boundary is None:
boundary = mimetools.choose_boundary()
if buffer is None:
buffer = ''
for(key, value) in vars:
buffer += '--%s\r\n' % boundary
buffer += 'Content-Disposition: form-data; name="%s"' % key
buffer += '\r\n\r\n' + value + '\r\n'
for(key, fd) in files:
# allow them to pass in a file or a tuple with name & data
if type(fd) == file:
name_in = fd.name
fd.seek(0)
data_in = fd.read()
elif type(fd) in (tuple, list):
name_in, data_in = fd
filename = os.path.basename(name_in)
contenttype = mimetypes.guess_type(filename)[0] or 'application/octet-stream'
buffer += '--%s\r\n' % boundary
buffer += 'Content-Disposition: form-data; name="%s"; filename="%s"\r\n' % (key, filename)
buffer += 'Content-Type: %s\r\n' % contenttype
# buffer += 'Content-Length: %s\r\n' % file_size
buffer += '\r\n' + data_in + '\r\n'
buffer += '--%s--\r\n\r\n' % boundary
return boundary, buffer
https_request = http_request