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Related links: There are two ways you can upload lots using HTTP POST.
  1. Sending a CSV formated string. e.g. "StockNumber,Shape,Weight,Color,Clarity\n\rStrok_1.3,Round,2.1,D,VVS1"
  2. Uploading a CSV file
Note: you will need to authenticate before sending the data.
The CSV formated string or file must be sent using Form HTTP method. All other data can be sent using Form HTTP as well as in the Query.

URL's for programmatical uploads:
String upload: http://technet.rapaport.com/HTTP/Upload/Upload.aspx?Method=string
File upload: http://technet.rapaport.com/HTTP/Upload/Upload.aspx?Method=file

Code examples: