A small python code to create formpost object in swift/ceph. This is a basic demonstration of form-post and does not have error handlings. Use it at your own risk.

post_object_formpost.py

import hashlib
import hmac
import time
import urlparse
import sys
import httplib2

class ObjectFormPost():

    def __init__(self):
        self.base_url = sys.argv[1]
        self.container_name = sys.argv[2]
        self.object_name = sys.argv[3]
        self.key = sys.argv[4]
        self.auth_key = sys.argv[5]

    def get_multipart_form(self, expires=600):
        path = "%s/%s/%s" % (
            urlparse.urlparse(self.base_url).path,
            self.container_name,
            self.object_name)

        redirect = ''
        max_file_size = 104857600
        max_file_count = 10
        expires += int(time.time())
        hmac_body = '%s\n%s\n%s\n%s\n%s' % (path,
                                            redirect,
                                            max_file_size,
                                            max_file_count,
                                            expires)

        signature = hmac.new(self.key, hmac_body, hashlib.sha1).hexdigest()

        fields = {'redirect': redirect,
                  'max_file_size': str(max_file_size),
                  'max_file_count': str(max_file_count),
                  'expires': str(expires),
                  'signature': signature}

        boundary = '--boundary--'
        data = []
        for (key, value) in fields.items():
            data.append('--' + boundary)
            data.append('Content-Disposition: form-data; name="%s"' % key)
            data.append('')
            data.append(value)

        data.append('--' + boundary)
        data.append('Content-Disposition: form-data; '
                    'name="file1"; filename="testfile"')
        data.append('Content-Type: application/octet-stream')
        data.append('')
        data.append('hello world')

        data.append('--' + boundary + '--')
        data.append('')

        body = '\r\n'.join(data)
        content_type = 'multipart/form-data; boundary=%s' % boundary
        return body, content_type

    def post_object_using_form(self):
        body, content_type = self.get_multipart_form()

        headers = {'Content-Type': content_type,
                   'Content-Length': str(len(body)),
                   'x-auth-token': self.auth_key}

        url = "%s/%s/%s" % (self.base_url, self.container_name, self.object_name)
        http = httplib2.Http()
        print http.request(url,"POST", body=body, headers=headers)

def main():
    if len(sys.argv) < 6:
        print "Usage: command base_url container object temp-url-key auth-key"
        exit(1)
    obj = ObjectFormPost()
    obj.post_object_using_form()

if __name__ == '__main__':
    main()