How to call Blob.Attach via REST API in Python?
Hello,
I am trying to use Python to POST data to the Nuxeo Automation API. Unfortunately I am unable to compose the “multipart/related” portion of the message correctly – I always receive the message “Failed to parse multipart request” with cause “Missing start boundary.”
Here is the code I've extracted:
Here is what the output looks like when sent to netcat:
This looks similar enough to the output at http://doc.nuxeo.com/display/NXDOC/REST+API that I am stumped.
Thank you for any help.
 |
Steven Huwig
Member (2.3K) 3 5 6 |
04/03/2013 ( History) |
Hello,
This worked for me:
1: Go and clone sfermigier source as suggested in Rest API documentation
2: Rewrite this method
def _attach_blob(self, blob, **params):
filename = os.path.basename(blob)
container = MIMEMultipart("related",
type="application/json+nxrequest",
start="request")
d = {'params': params}
json_data = json.dumps(d)
json_part = MIMEBase("application", "json+nxrequest")
json_part.add_header("Content-ID", "request")
json_part.set_payload(json_data)
container.attach(json_part)
ctype, encoding = mimetypes.guess_type(filename)
if ctype:
maintype, subtype = ctype.split('/', 1)
else:
maintype, subtype = "application", "binary"
blob_part = MIMEBase(maintype, subtype)
blob_part.add_header("Content-ID", "input")
blob_part.add_header("Content-Transfer-Encoding", "binary")
blob_part.add_header("Content-Disposition",
"attachment;filename=%s" % filename)
blob_part.set_payload(open(blob,"rb").read())
container.attach(blob_part)
# Create data by hand :(
boundary = "====Part=%s=%s===" % (time.time, random.randint(0, 1000000000))
headers = {
"Accept": "application/json+nxentity, */*",
"Authorization": self.auth,
"Content-Type": 'multipart/related;boundary="%s";type="application/json+nxrequest";start="request"'
% boundary,
}
data = "--" + boundary + "\r\n" \
+ json_part.as_string() + "\r\n" \
+ "--" + boundary + "\r\n" \
+ blob_part.as_string() + "\r\n" \
+ "--" + boundary + "--"
req = urllib2.Request(self.root + "Blob.Attach", data, headers)
try:
resp = self.opener.open(req)
except Exception, e:
self._handle_error(e)
raise
s = resp.read()
return s
3: Call the method:
session = Session(operationURI, user, password)
session._attach_blob('c:\\hop.pdf', document=aDocID)
Where aDocID is the UID of the document you want to fill in.
Notice that I may just not have found the proper way to make it work as given but my binary attachment went its way like this.
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Antoine Cordier
Member (2.7K) 3 5 7 |
10/02/2013 ( History) |