(Ruby) Amazon SP-API Request an LWA access token

See more Amazon SP-API Examples

Request an LWA access token, make a secure HTTP POST to the LWA authentication server (https://api.amazon.com/auth/o2/token)

For more information, see https://developer-docs.amazon.com/sp-api/docs/connecting-to-the-selling-partner-api

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

http = Chilkat::CkHttp.new()

# Implements the following CURL command:

# curl -X POST https://example.com/auth/o2/token \
#   -H "Host: api.amazon.com" \
#   -H "Content-Type: application/x-www-form-urlencoded;charset=UTF-8" \
#   -d "grant_type=refresh_token" \
#   -d "refresh_token=Aztr|..." \
#   -d "client_id=foodev" \
#   -d "client_secret=Y76SDl2F"

# Use the following online tool to generate HTTP code from a CURL command
# Convert a cURL Command to HTTP Source Code

req = Chilkat::CkHttpRequest.new()
req.AddParam("grant_type","refresh_token")
req.AddParam("refresh_token","Aztr|...")
req.AddParam("client_id","foodev")
req.AddParam("client_secret","Y76SDl2F")

req.AddHeader("Host","api.amazon.com")

# resp is a CkHttpResponse
resp = http.PostUrlEncoded("https://api.amazon.com/auth/o2/token",req)
if (http.get_LastMethodSuccess() == false)
    print http.lastErrorText() + "\n";
    exit
end

statusCode = resp.get_StatusCode()
print "Status Code = " + statusCode.to_s() + "\n";

json = Chilkat::CkJsonObject.new()
json.Load(resp.bodyStr())

json.put_EmitCompact(false)
print json.emit() + "\n";

if (statusCode != 200)
    print "Failed." + "\n";
    exit
end

# Success returns this JSON:

# {
#   "access_token": "Atza|...",
#   "refresh_token": "Atzr|...",
#   "token_type": "bearer",
#   "expires_in": 3600
# }

# Save the JSON token to a file for use in subsequent calls.
# (this example is passing a relative file path.  You don't need to save to a file
# if, for example, you keep the access token in-memory for subsequent use...)
success = json.WriteFile("qa_data/tokens/sp_api_lwa_token.json")

print "access_token: " + json.stringOf("access_token") + "\n";
print "Success." + "\n";