add configurable default ttl

Author: danielcondemarin

README.md

@@ -50,6 +50,8 @@ distribution:
   inputs:
     region: us-east-1
     enabled: true # optional
+    defaults: # optional
+      ttl: 15
     origins:
       - https://my-bucket.s3.amazonaws.com
 ```

lib/getDefaultCacheBehavior.js

@@ -1,4 +1,4 @@
-module.exports = (originId) => {
+module.exports = (originId, defaults = {}) => {
   return {
     TargetOriginId: originId,
     ForwardedValues: {
@@ -31,7 +31,7 @@ module.exports = (originId) => {
       }
     },
     SmoothStreaming: false,
-    DefaultTTL: 86400,
+    DefaultTTL: defaults.ttl || 86400,
     MaxTTL: 31536000,
     Compress: false,
     LambdaFunctionAssociations: {

lib/index.js

@@ -27,7 +27,10 @@ const createCloudFrontDistribution = async (cf, inputs) => {
   distributionConfig.Origins = Origins
 
   // set first origin declared as the default cache behavior
-  distributionConfig.DefaultCacheBehavior = getDefaultCacheBehavior(Origins.Items[0].Id)
+  distributionConfig.DefaultCacheBehavior = getDefaultCacheBehavior(
+    Origins.Items[0].Id,
+    inputs.defaults
+  )
 
   if (CacheBehaviors) {
     distributionConfig.CacheBehaviors = CacheBehaviors
@@ -65,7 +68,10 @@ const updateCloudFrontDistribution = async (cf, distributionId, inputs) => {
 
   const { Origins, CacheBehaviors } = parseInputOrigins(inputs.origins)
 
-  params.DistributionConfig.DefaultCacheBehavior = getDefaultCacheBehavior(Origins.Items[0].Id)
+  params.DistributionConfig.DefaultCacheBehavior = getDefaultCacheBehavior(
+    Origins.Items[0].Id,
+    inputs.defaults
+  )
   params.DistributionConfig.Origins = Origins
 
   if (CacheBehaviors) {

serverless.js

@@ -31,7 +31,10 @@ class CloudFront extends Component {
     })
 
     if (this.state.id) {
-      if (!equals(this.state.origins, inputs.origins)) {
+      if (
+        !equals(this.state.origins, inputs.origins) ||
+        !equals(this.state.defaults, inputs.defaults)
+      ) {
         this.context.debug(`Updating CloudFront distribution of ID ${this.state.id}.`)
         this.state = await updateCloudFrontDistribution(cf, this.state.id, inputs)
       }
@@ -42,6 +45,7 @@ class CloudFront extends Component {
 
     this.state.region = inputs.region
     this.state.origins = inputs.origins
+    this.state.defaults = inputs.defaults
     await this.save()
 
     this.context.debug(`CloudFront deployed successfully with URL: ${this.state.url}.`)