old_contents: import mimetypes
  import mimetools
  
  def encode_multipart_formdata(params, files):
      boundary = mimetools.choose_boundary()
  
      lines = []
      for name in params:
          lines.append("--" + boundary)
          lines.append("Content-Disposition: form-data; name=\"%s\"" % name)
          lines.append("")
          lines.append(str(params[name]))
      for name in files:
          filename = files[name]
          content_type, _ = mimetypes.guess_type(filename)
          if content_type is None:
              content_type = "application/octet-stream"
  
          lines.append("--" + boundary)
          lines.append("Content-Disposition: form-data; name=\"%s\"; filename=\"%s\"" % (name, filename))
          lines.append("Content-Type: %s" % content_type)
          lines.append("")
          lines.append(open(filename, "rb").read())
      lines.append("--" + boundary + "--")
      lines.append("")
  
      body = "\r\n".join(lines)
      headers = {'Content-Type': "multipart/form-data; boundary=%s" % boundary,
                 'Content-Length': str(len(body))}
      return headers, body
  
new_contents: import os
  import mimetypes
  import mimetools
  
  def encode_multipart_formdata(params, files):
      boundary = mimetools.choose_boundary()
  
      lines = []
      for name in params:
          lines.append("--" + boundary)
          lines.append("Content-Disposition: form-data; name=\"%s\"" % name)
          lines.append("")
          lines.append(str(params[name]))
      for name in files:
          filename = files[name]
          content_type, _ = mimetypes.guess_type(filename)
          if content_type is None:
              content_type = "application/octet-stream"
  
          lines.append("--" + boundary)
          lines.append("Content-Disposition: form-data; name=\"%s\"; filename=\"%s\"" % (name, filename))
          lines.append("Content-Type: %s" % content_type)
          lines.append("")
          lines.append(open(os.path.expanduser(filename), "rb").read())
      lines.append("--" + boundary + "--")
      lines.append("")
  
      body = "\r\n".join(lines)
      headers = {'Content-Type': "multipart/form-data; boundary=%s" % boundary,
                 'Content-Length': str(len(body))}
      return headers, body
  
subject: Expand "~" to home path