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(Ruby) PayPal -- Get an OAuth 2.0 Access Token

Demonstrates how to send a request to get a PayPal OAuth2 access token. Sends an HTTP request equivalent to the following:

curl https://api.sandbox.paypal.com/v1/oauth2/token \
  -H "Accept: application/json" \
  -H "Accept-Language: en_US" \
  -u "Client-Id:Secret" \
  -d "grant_type=client_credentials"

Chilkat Ruby Downloads

Ruby Library for Linux and MAC OS X

require 'chilkat'

# Note: Requires Chilkat v9.5.0.64 or greater.

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

rest = Chilkat::CkRest.new()

# Make the initial connection.
# A single REST object, once connected, can be used for many PayPal REST API calls.
# The auto-reconnect indicates that if the already-established HTTPS connection is closed,
# then it will be automatically re-established as needed.
bAutoReconnect = true
success = rest.Connect("api.sandbox.paypal.com",443,true,bAutoReconnect)
if (success != true)
    print rest.lastErrorText() + "\n";
    exit
end

# Duplicate this request:

# 	curl https://api.sandbox.paypal.com/v1/oauth2/token \
# 	  -H "Accept: application/json" \
# 	  -H "Accept-Language: en_US" \
# 	  -u "Client-Id:Secret" \
# 	  -d "grant_type=client_credentials"

rest.AddHeader("Accept","application/json")
rest.AddHeader("Accept-Language","en_US")

# For additional help on where to find  your client ID and API secret, see PayPal Client_ID and API_Secret
rest.SetAuthBasic("PAYPAL_REST_API_CLIENT_ID","PAYPAL_REST_API_SECRET")

rest.AddQueryParam("grant_type","client_credentials")

responseStr = rest.fullRequestFormUrlEncoded("POST","/v1/oauth2/token")
if (rest.get_LastMethodSuccess() != true)
    print rest.lastErrorText() + "\n";
    exit
end

print rest.lastRequestHeader() + "\n";

# A sample response:

# 	{
# 	  "scope": "https://api.paypal.com/v1/payments/.* https://api.paypal.com/v1/vault/credit-card https://api.paypal.com/v1/vault/credit-card/.*",
# 	  "access_token": "EEwJ6tF9x5WCIZDYzyZGaz6Khbw7raYRIBV_WxVvgmsG",
# 	  "token_type": "Bearer",
# 	  "app_id": "APP-6XR95014BA15863X",
# 	  "expires_in": 28800
# 	}

json = Chilkat::CkJsonObject.new()
json.Load(responseStr)
json.put_EmitCompact(false)

# Check the response status code.  A 200 indicates success..
if (rest.get_ResponseStatusCode() != 200)
    print json.emit() + "\n";
    print "Failed." + "\n";
    exit
end

# Given that the access token expires in approx 8 hours,
# let's record the date/time this token was created.
# This will allow us to know beforehand if the token
# is expired (and we can then fetch a new token).
dateTime = Chilkat::CkDateTime.new()
bLocalTime = false
dtNow = dateTime.GetAsUnixTime(bLocalTime)
json.AppendInt("tokenCreateTimeUtc",dtNow)

# Examine the access token and save to a file.
print "Access Token: " + json.stringOf("access_token") + "\n";
print "Full JSON Response:" + "\n";
print json.emit() + "\n";

sbResponse = Chilkat::CkStringBuilder.new()
sbResponse.Append(json.emit())
bEmitBom = false
sbResponse.WriteFile("qa_data/tokens/paypal.json","utf-8",bEmitBom)

 

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