Added support for blacklisting paths for caching

This is related to #62
cloudposse · Jan 9, 2020 · b9f9f23 · b9f9f23
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diff --git a/README.md b/README.md
@@ -1,4 +1,43 @@
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@@ -111,6 +150,7 @@ Available targets:
 | attributes | Additional attributes (e.g. `1`) | list(string) | `<list>` | no |
 | bucket_domain_format | Format of bucket domain name | string | `%s.s3.amazonaws.com` | no |
 | cached_methods | List of cached methods (e.g. GET, PUT, POST, DELETE, HEAD) | list(string) | `<list>` | no |
+| caching_blacklist | Paths of objects that should never be cached for any HTTP methods | set(string) | `<list>` | no |
 | comment | Comment for the origin access identity | string | `Managed by Terraform` | no |
 | compress | Compress content for web requests that include Accept-Encoding: gzip in the request header | bool | `false` | no |
 | cors_allowed_headers | List of allowed headers for S3 bucket | list(string) | `<list>` | no |
@@ -190,42 +230,47 @@ Check out these related projects.
 
 ## Help
 
-**Got a question?**
+**Got a question?** We got answers. 
 
 File a GitHub [issue](https://github.com/cloudposse/terraform-aws-cloudfront-s3-cdn/issues), send us an [email][email] or join our [Slack Community][slack].
 
 [![README Commercial Support][readme_commercial_support_img]][readme_commercial_support_link]
 
-## Commercial Support
-
-Work directly with our team of DevOps experts via email, slack, and video conferencing. 
-
-We provide [*commercial support*][commercial_support] for all of our [Open Source][github] projects. As a *Dedicated Support* customer, you have access to our team of subject matter experts at a fraction of the cost of a full-time engineer. 
+## DevOps Accelerator for Startups
 
-[![E-Mail](https://img.shields.io/badge/[email protected])][email]
 
-- **Questions.** We'll use a Shared Slack channel between your team and ours.
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-- **Build New Terraform Modules.** We'll [develop original modules][module_development] to provision infrastructure.
-- **Cloud Architecture.** We'll assist with your cloud strategy and design.
-- **Implementation.** We'll provide hands-on support to implement our reference architectures. 
+We are a [**DevOps Accelerator**][commercial_support]. We'll help you build your cloud infrastructure from the ground up so you can own it. Then we'll show you how to operate it and stick around for as long as you need us. 
 
+[![Learn More](https://img.shields.io/badge/learn%20more-success.svg?style=for-the-badge)][commercial_support]
 
+Work directly with our team of DevOps experts via email, slack, and video conferencing.
 
-## Terraform Module Development
-
-Are you interested in custom Terraform module development? Submit your inquiry using [our form][module_development] today and we'll get back to you ASAP.
+We deliver 10x the value for a fraction of the cost of a full-time engineer. Our track record is not even funny. If you want things done right and you need it done FAST, then we're your best bet.
 
+- **Reference Architecture.** You'll get everything you need from the ground up built using 100% infrastructure as code.
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+- **Troubleshooting.** You'll get help to triage when things aren't working.
+- **Code Reviews.** You'll receive constructive feedback on Pull Requests.
+- **Bug Fixes.** We'll rapidly work with you to fix any bugs in our projects.
 
 ## Slack Community
 
 Join our [Open Source Community][slack] on Slack. It's **FREE** for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally *sweet* infrastructure.
 
 ## Newsletter
 
-Signup for [our newsletter][newsletter] that covers everything on our technology radar.  Receive updates on what we're up to on GitHub as well as awesome new projects we discover. 
+Sign up for [our newsletter][newsletter] that covers everything on our technology radar.  Receive updates on what we're up to on GitHub as well as awesome new projects we discover. 
+
+## Office Hours
+
+[Join us every Wednesday via Zoom][office_hours] for our weekly "Lunch & Learn" sessions. It's **FREE** for everyone! 
+
+[![zoom](https://img.cloudposse.com/fit-in/200x200/https://cloudposse.com/wp-content/uploads/2019/08/Powered-by-Zoom.png")][office_hours]
 
 ## Contributing
 
@@ -250,7 +295,7 @@ In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
 
 ## Copyright
 
-Copyright © 2017-2019 [Cloud Posse, LLC](https://cpco.io/copyright)
+Copyright © 2017-2020 [Cloud Posse, LLC](https://cpco.io/copyright)
 
 
 
@@ -317,33 +362,31 @@ Check out [our other projects][github], [follow us on twitter][twitter], [apply
   [cliveza_homepage]: https://github.com/cliveza
   [cliveza_avatar]: https://img.cloudposse.com/150x150/https://github.com/cliveza.png
 
-
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+  [terraform_modules]: https://cpco.io/terraform-modules?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-cloudfront-s3-cdn&utm_content=terraform_modules
+  [readme_header_img]: https://cloudposse.com/readme/header/img
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+  [readme_footer_img]: https://cloudposse.com/readme/footer/img
+  [readme_footer_link]: https://cloudposse.com/readme/footer/link?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-cloudfront-s3-cdn&utm_content=readme_footer_link
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diff --git a/docs/terraform.md b/docs/terraform.md
@@ -9,6 +9,7 @@
 | attributes | Additional attributes (e.g. `1`) | list(string) | `<list>` | no |
 | bucket_domain_format | Format of bucket domain name | string | `%s.s3.amazonaws.com` | no |
 | cached_methods | List of cached methods (e.g. GET, PUT, POST, DELETE, HEAD) | list(string) | `<list>` | no |
+| caching_blacklist | Paths of objects that should never be cached for any HTTP methods | set(string) | `<list>` | no |
 | comment | Comment for the origin access identity | string | `Managed by Terraform` | no |
 | compress | Compress content for web requests that include Accept-Encoding: gzip in the request header | bool | `false` | no |
 | cors_allowed_headers | List of allowed headers for S3 bucket | list(string) | `<list>` | no |

diff --git a/main.tf b/main.tf
@@ -185,6 +185,32 @@ resource "aws_cloudfront_distribution" "default" {
     }
   }
 
+  dynamic "ordered_cache_behavior" {
+    for_each = var.caching_blacklist
+    content {
+      path_pattern     = ordered_cache_behavior.value
+      allowed_methods  = ["DELETE", "GET", "HEAD", "OPTIONS", "PATCH", "POST", "PUT"]
+      cached_methods   = ["GET", "HEAD", "OPTIONS"]
+      target_origin_id = module.distribution_label.id
+      compress         = var.compress
+      trusted_signers  = var.trusted_signers
+
+      forwarded_values {
+        query_string = var.forward_query_string
+        headers      = var.forward_header_values
+
+        cookies {
+          forward = var.forward_cookies
+        }
+      }
+
+      viewer_protocol_policy = var.viewer_protocol_policy
+      default_ttl            = 0
+      min_ttl                = 0
+      max_ttl                = 0
+    }
+  }
+
   restrictions {
     geo_restriction {
       restriction_type = var.geo_restriction_type

diff --git a/variables.tf b/variables.tf
@@ -204,6 +204,12 @@ variable "viewer_protocol_policy" {
   default     = "redirect-to-https"
 }
 
+variable "caching_blacklist" {
+  type        = set(string)
+  default     = []
+  description = "Paths of objects that should never be cached for any HTTP methods"
+}
+
 variable "allowed_methods" {
   type        = list(string)
   default     = ["DELETE", "GET", "HEAD", "OPTIONS", "PATCH", "POST", "PUT"]