How can I use the grant_type=password oauth flow with salesforce.com?

Question

I'm trying to get an authorization token using the Username-Password flow (as described in the final section of this article). I'm sending the following request (using Python's httplib, in case that's relevant): https://login.salesforce.com/services/oauth2/token POST data: username=&client_secret=&password=&grant_type=password&client_id= And getting the response: 400 Bad Request {"error":"unsupported_grant_type","error_description":"grant type not supported"} Is the password grant_type really unsupported, or am I missing something? It seems to give this error even when I'm sending a grant_type that definitely does work (such as authorization_code). Note that I've tried the suggestions in the answer here, and they don't work for me. Select the correct answer from above options

Answer 1

Actually, this is because of the content-type header which has not been set to the correct value. It should actually be set as: application/x-www-form-urlencoded. Also, you need to make sure that your parameters are correctly encoded. To learn in-depth about Workflow in Salesforce, sign up for an industry based Salesforce developer certification.