how to use URLfetch for use with http post

Questions
,
1

I’m not very strong with http and urlfetch, but I’m trying to log in to my TD-Ameritrade account with urlfetch here is the API description:

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How do I pass the parameters and how do call urlfetch? what is a content type http header?

2

Kay Herbert:

Try

URLFetch[
	"https://apis.tdameritrade.com/apps/300/LogIn?source=#sourceID#&version=#version number#",
	"Method" -> "Post",
	"Headers" -> {"Content-Type" -> "application/x-www-form-urlencoded"},
	"BodyData" -> "userid=#userid#&password=#password#&source=#sourceID#&version=#version number#\n\n",
	"Cookies" -> True,
	"VerifyPeer" -> True]

These variables are assigned by TD Ameritrade, hopefully you have them

  • userid=#userid#
  • password=#password#
  • source=#sourceID#
  • version=#version number#

Also assume you can fill in the proper Mathematica variables and re-work this starter code to work. So the #variable# should be replaced with the correct strings.

Hans

3

Thanks, that worked! Exactly what I was looking for. Where did you find the BodyData option?

4

The Options section of the Documentation located URLFetch—Wolfram Documentation
has “Body” as the option for the payload. I am using Mathematica version 10.0.2 and the local documentation has “BodyData” as the option for the payload. I would go with your local documentation ref/URLFetch. I did not find it per se though, the payload concept is part of most HTTP Request/Response client and server implementations.

5

I have version 10.1, cannot find BodyData but it works while Body does not.

6

There maybe an issue with the documentation.

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From local documentation “BodyData” is there and works. The link in the previous post does say “Wolfram Language”?