python表单数据系统_使用MultipartPostHandler通过Python发布表单数据
我遇到了同样的问题，我需要在不使用外部库的情况下进行多部分表单发布。我写了一篇关于我遇到的问题的博客。
我最终使用了http://code.activestate.com/recipes/146306/的修改版。该url中的代码实际上只是将文件的内容附加为字符串，这可能导致二进制文件出现问题。这是我的工作代码。
import mimetools
import mimetypes
import io
import http
import json
form = MultiPartForm()
form.add_field("form_field", "my awesome data")
# Add a fake file
form.add_file(key, os.path.basename(filepath),
fileHandle=codecs.open("/path/to/my/file.zip", "rb"))
# Build the request
url = "http://www.example.com/endpoint"
schema, netloc, url, params, query, fragments = urlparse.urlparse(url)
try:
form_buffer = form.get_binary().getvalue()
http = httplib.HTTPConnection(netloc)
http.connect()
http.putrequest("POST", url)
http.putheader('Content-type',form.get_content_type())
http.putheader('Content-length', str(len(form_buffer)))
http.endheaders()
http.send(form_buffer)
except socket.error, e:
raise SystemExit(1)
r = http.getresponse()
if r.status == 200:
return json.loads(r.read())
else:
print('Upload failed (%s): %s' % (r.status, r.reason))
class MultiPartForm(object):
"""Accumulate the data to be used when posting a form."""
def __init__(self):
self.form_fields = []
self.files = []
self.boundary = mimetools.choose_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."""
self.form_fields.append((name, value))
return
def add_file(self, fieldname, filename, fileHandle, mimetype=None):
"""Add a file to be uploaded."""
body = fileHandle.read()
if mimetype is None:
mimetype = mimetypes.guess_type(filename)[0] or 'application/octet-stream'
self.files.append((fieldname, filename, mimetype, body))
return
def get_binary(self):
"""Return a binary buffer containing the form data, including attached files."""
part_boundary = '--' + self.boundary
binary = io.BytesIO()
needsCLRF = False
# Add the form fields
for name, value in self.form_fields:
if needsCLRF:
binary.write('\r\n')
needsCLRF = True
block = [part_boundary,
'Content-Disposition: form-data; name="%s"' % name,
'',
value
]
binary.write('\r\n'.join(block))
# Add the files to upload
for field_name, filename, content_type, body in self.files:
if needsCLRF:
binary.write('\r\n')
needsCLRF = True
block = [part_boundary,
str('Content-Disposition: file; name="%s"; filename="%s"' % \
(field_name, filename)),
'Content-Type: %s' % content_type,
''
]
binary.write('\r\n'.join(block))
binary.write('\r\n')
binary.write(body)
# add closing boundary marker,
binary.write('\r\n--' + self.boundary + '--\r\n')
return binary