Edgestash
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This document introduces Edgestash, a templating system that uses JSON data and EdgeSide Includes (ESI) to render templates on the edge cache. It discusses how Edgestash works using Varnish Cache to parse responses, index JSON, and execute templates. The document outlines the benefits of Edgestash like faster load times and less CPU usage. It also covers the syntax used in Edgestash templates and example Varnish Configuration Language code.
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Edgestash
- 1. Edgestash Modern ESI Templating Martin Blix Grydeland Stockholm 2017
- 2. Edgestash {{#name}} Hey {{name}}! ({{birth_year}}) {{/name}} {{^name}} Welcome Guest {{/name}} { "name": "Steve", "birth_year": 1964 } Hey Steve! (1964)
- 3. Edgestash {{#name}} Hey {{name}}! ({{birth_year}}) {{/name}} {{^name}} Welcome Guest {{/name}} 404 Welcome Guest
- 4. Edgestash Where did it come from?
- 5. Modern MVC Pattern HTML JS JSON
- 6. Modern MVC Pattern HTML JS JSON Varnish Cache
- 7. Modern MVC Pattern HTML JSON Varnish Cache Edgestash JS X
- 8. Benefits Faster load time Less CPU requirements (mobile) Good for product templating and user branding Ecommerce Localization/I18N
- 9. Varnish Considerations Do as little work as possible Fetch and Delivery processors Ability to store arbitrary data into cache
- 10. Edgestash Pieces JSON Edgestash compiler Edgestash executor
- 11. Edgestash Versatile syntax Compiled into byte code Zero copy
- 12. JSON Fast indexing Storage into cache Fast searching
- 13. Edgestash syntax {{variable}} {{& unescaped_variable}} {{#section}}...{{/section}} {{^not_section}}...{{/not_section}} {{!comment}} {{> /include/url}}
- 15. VCL example code import edgestash; sub vcl_backend_response { if (bereq.url ~ ".es$") { edgestash.parse_response(); } else if (bereq.url ~ ".json$") { edgestash.index_json(); } }
- 16. VCL example code import edgestash; sub vcl_deliver { if (edgestash.is_edgestash()) { edgestash.execute("/path.json", false); } }
- 17. What is next? Configurable delimiters: {{=[[ ]]=}} Extend Edgestash language Object notation: {{#obj}}{{value}}{{/obj}} vs {{obj.value}} Expressions: {{$ temperature < 10}}Where did spring go?{{/$}} GZIP support
- 18. Thanks!
Editor's Notes
- Moden MVC: client side composition via Javascript. Puts added strain on clients: Multiple round-trips, connections, device CPU/RAM consumption strain
- “Do as little work as possible”: Varnish has a highly optimized delivery path: We’d like to keep it that way Expand on fetch/delivery bits: Use slides from pESI presentation? “Arbitrary data into cache”: object attributes?
- ES development can be split into three separate components: JSON processing, ES compiler (vfp), ES executor (vdp)
- Zero copy basically relates to the fact that we don’t cons up a big blob of memory on delivery: we stuff the buffers directly on the socket on the fly without allocation of auxiliary memory for stitching together the contents
- caching/indexing: optional
- Read up on these
- Verify this Also include an example
- Verify this Also include an example
- Verify this Also include an example