provider/aws: Limit SNS Topic Subscription protocols

- update the ARN with the new ID

builtin/providers/aws/resource_aws_sns_topic_subscription.go

@@ -3,6 +3,7 @@ package aws
 import (
 	"fmt"
 	"log"
+	"strings"
 
 	"github.com/hashicorp/terraform/helper/schema"
 
@@ -10,6 +11,8 @@ import (
 	"github.com/aws/aws-sdk-go/service/sns"
 )
 
+const awsSNSPendingConfirmationMessage = "pending confirmation"
+
 func resourceAwsSnsTopicSubscription() *schema.Resource {
 	return &schema.Resource{
 		Create: resourceAwsSnsTopicSubscriptionCreate,
@@ -22,6 +25,19 @@ func resourceAwsSnsTopicSubscription() *schema.Resource {
 				Type:     schema.TypeString,
 				Required: true,
 				ForceNew: false,
+				ValidateFunc: func(v interface{}, k string) (ws []string, errors []error) {
+					value := v.(string)
+					forbidden := []string{"email", "sms", "http"}
+					for _, f := range forbidden {
+						if strings.Contains(value, f) {
+							errors = append(
+								errors,
+								fmt.Errorf("Unsupported protocol (%s) for SNS Topic", value),
+							)
+						}
+					}
+					return
+				},
 			},
 			"endpoint": &schema.Schema{
 				Type:     schema.TypeString,
@@ -55,16 +71,17 @@ func resourceAwsSnsTopicSubscription() *schema.Resource {
 func resourceAwsSnsTopicSubscriptionCreate(d *schema.ResourceData, meta interface{}) error {
 	snsconn := meta.(*AWSClient).snsconn
 
-	if d.Get("protocol") == "email" {
-		return fmt.Errorf("Email endpoints are not supported!")
-	}
-
 	output, err := subscribeToSNSTopic(d, snsconn)
 
 	if err != nil {
 		return err
 	}
 
+	if output.SubscriptionArn != nil && *output.SubscriptionArn == awsSNSPendingConfirmationMessage {
+		log.Printf("[WARN] Invalid SNS Subscription, received a \"%s\" ARN", awsSNSPendingConfirmationMessage)
+		return nil
+	}
+
 	log.Printf("New subscription ARN: %s", *output.SubscriptionArn)
 	d.SetId(*output.SubscriptionArn)
 
@@ -92,7 +109,7 @@ func resourceAwsSnsTopicSubscriptionUpdate(d *schema.ResourceData, meta interfac
 		// Re-subscribe and set id
 		output, err := subscribeToSNSTopic(d, snsconn)
 		d.SetId(*output.SubscriptionArn)
-
+		d.Set("arn", *output.SubscriptionArn)
 	}
 
 	if d.HasChange("raw_message_delivery") {

website/source/docs/providers/aws/r/sns_topic_subscription.html.markdown

@@ -49,7 +49,7 @@ resource "aws_sns_topic_subscription" "user_updates_sqs_target" {
 The following arguments are supported:
 
 * `topic_arn` - (Required) The ARN of the SNS topic to subscribe to
-* `protocol` - (Required) The protocol to use. The possible values for this are: `sqs`, `http`, `https`, `lambda`, `sms`, or `application`. (`email` is an option but unsupported, see below)
+* `protocol` - (Required) The protocol to use. The possible values for this are: `sqs`,  `lambda`,  or `application`. (`email`, `http`, `https`, `sms`, are options but unsupported, see below)
 * `endpoint` - (Required) The endpoint to send data to, the contents will vary with the protocol. (see below for more information)
 * `raw_message_delivery` - (Optional) Boolean indicating whether or not to enable raw message delivery (the original message is directly passed, not wrapped in JSON with the original message in the message property).
 
@@ -57,10 +57,7 @@ The following arguments are supported:
 
 Supported SNS protocols include:
 
-* `http` -- delivery of JSON-encoded message via HTTP POST
-* `https` -- delivery of JSON-encoded message via HTTPS POST
 * `lambda` -- delivery of JSON-encoded message to a lambda function
-* `sms` -- delivery of message via SMS
 * `sqs` -- delivery of JSON-encoded message to an Amazon SQS queue
 * `application` -- delivery of JSON-encoded message to an EndpointArn for a mobile app and device
 
@@ -68,16 +65,18 @@ Unsupported protocols include the following:
 
 * `email` -- delivery of message via SMTP
 * `email-json` -- delivery of JSON-encoded message via SMTP
+* `http` -- delivery via HTTP
+* `http(s)` -- delivery via HTTPS
+* `sms` -- delivery text message
 
-These are unsupported because the email address needs to be authorized and does not generate an ARN until the target email address has been validated. This breaks
+These are unsupported because the endpoint needs to be authorized and does not 
+generate an ARN until the target email address has been validated. This breaks
 the Terraform model and as a result are not currently supported.
 
 ### Specifying endpoints
 
 Endpoints have different format requirements according to the protocol that is chosen.
 
-* HTTP/HTTPS endpoints will require a URL to POST data to
-* SMS endpoints are mobile numbers that are capable of receiving an SMS
 * SQS endpoints come in the form of the SQS queue's ARN (not the URL of the queue) e.g: `arn:aws:sqs:us-west-2:432981146916:terraform-queue-too`
 * Application endpoints are also the endpoint ARN for the mobile app and device.