HTTP client to post using multipart/form-Data

Repost a piece of PythonCodeUsing urllib2 to use multipart/form-data to send files

 Import httplib, mimetypesdef post_multipart (host, selector, fields, files ):  """ Post fields and files to an HTTP host As Multipart/form- Data. Fields  Is A sequence of (name, value) Elements For  Regular form fields. Files  Is A sequence of (name, filename, value) Elements For Data to be uploaded As Files return the server  '  S response page.      """ Content_type, body = Encode_multipart_formdata (fields, files) h = Httplib. HTTP (host) H. putrequest (  '  Post  '  , Selector) H. putheader (  '  Content-Type  '  , Content_type) H. putheader ( '  Content-Length  '  , STR (LEN (body) H. endheaders () H. Send (body) errcode, errmsg, headers = H. getreply ()  Return  H. file. Read () def encode_multipart_formdata (fields, files ):  """ Fields Is A sequence of (name, value) Elements For  Regular form fields. Files  Is A sequence of (name, filename, value) ElementsFor Data to be uploaded As  Files return (content_type, body) Ready  For  Httplib. Http instance  """ Boundary = '  ---------- This_is_the_boundary _ $  '  CRLF = '  \ R \ n  '  L =[]  For (Key, value) In  Fields: L. append (  '  --  ' + Boundary) L. append (  '  Content-Disposition: Form-data; name = "% s"  ' % Key) L. append (  ''  ) L. append (value)  For (Key, filename, value) In  Files: L. append (  '  --  ' + Boundary) L. append (  '  Content-Disposition: Form-data; name = "% s"; filename = "% s"  ' % (Key, filename) L. append (  '  Content-Type: % s  ' %Get_content_type (filename) L. append (  ''  ) L. append (value) L. append (  '  --  ' + Boundary + '  --  '  ) L. append (  ''  ) Body = CRLF. Join (l) content_type = ' Multipart/form-data; boundary = % s  ' % Boundary  Return  Content_type, bodydef get_content_type (filename ):  Return Mimetypes. guess_type (filename )[ 0 ] Or '  Application/octet-stream  ' 

We recommend that youHttplib. HTTPChange to httplib. httpconnection.When httplib. Connection is initialized, a timeout is input to achieve more flexible control.

See
http://code.activestate.com/recipes/146306/
http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2