Building for success and failure with Disqus
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Building for success and failure with Disqus
- 1. Building for Success and Failure with AtlantaPHP, October 2014
- 2. “Let’s Build a Blog!” Says Every Developer Ever
- 5. What is it? • Discussion web service • Free as in beer • Integrates with everything • Quality content • OAuth and SSO • Embeddable widget • Web API
- 10. Fundamentals A crash course
- 12. Category Limitations • Categories may only be created using the API. • Moderation may not be performed on posts by Category, only by Forum and Thread.
- 13. Disqus API threads/create threads/list posts/create posts/list posts/report Full documentation is available at http://disqus.com/api
- 14. Registering Your App https://disqus.com/api/applications /register/ 1. Specify Domains 2. Set Permissions Read Read and Write Read, Write, and Manage 3. Save Tokens Access Token API Key API Secret
- 15. Create a Forum https://disqus.com/admin/create/ 1. Name your site 2. Specify a unique domain Creating an application does not implicitly create a forum!
- 16. Posting to Disqus As a user Authenticate via OAuth As a guest 1. Enable “Allow guests to comment” (Settings > General) 2. Application domain must be set correctly 3. Use the magic API key: E8Uh5l5fHZ6gD8U3KycjAIAk46f68Zw7 C6eW8WSjZvCLXebZ7p0r1yrYDrLilk2F
- 17. drexarj/disqus-php github.com/disqus/disqus-php Composer: drexarj/disqus-php
- 19. What could possibly go wrong?
- 23. Caching to the Rescue
- 24. Caching to the Rescue
- 25. It’s Dynamic Data… • New posts submitted • Moderator approves post • Moderator disapproves post • User flags a post as objectionable
- 26. Conflicting Objectives • High load • Short cache expiration • Failover • No cache expiration • How to synchronize?
- 27. Adding a Failover Cache burst cache failover cache 1 2 3
- 28. Failing Over burst cache failover cache 1 2 3
- 29. Adding a Health Check burst cache failover cache 2 3 4 1
- 30. Caching Health Status • If health status expires, everything just fails over • Adjust the health status expiration to back off: • FAIL 1: expiration=2 minutes • FAIL 2: expiration=4 minutes • FAIL 3: expiration=8 minutes • …etc
- 31. “Is it worth it?” –You
- 33. Implementation: Cache Servers • Burst: memcached • Failover: MongoDB (or Redis)
- 34. Implementation: Scripts • Health check • Cache warmup • Thread creation
- 35. Implementation: API Client • Guzzle-based client (compwright/disguz) • Custom Guzzle Cache adapters
- 36. Building for Success and Failure with AtlantaPHP, October 2014
- 37. Thank you! • https://github.com/compwright/disqus-demo • https://github.com/compwright/disguz • https://github.com/compwright/disqus-cli Feedback: https://joind.in/12119
Hinweis der Redaktion
- Disqus normally plays second fiddle to your site content. Blog comments, e-commerce site comments Donnell Leahy and Natalie MacMaster (You’ll never be good enough to play second to either one of these guys)
- What if Disqus was your primary database? We did this very thing at Brandmovers last year…
- Microsite Several categories of idea submissions Zero tolerance for objectionable content Perfect for DISQUS!
- Disqus nowhere to be seen Guest posting
- Disqus Taxonomy: Forum = site consisting of Threads, and Posts Thread = collection of Posts in a tree-like structure (“discussion”), unique slug, may be assigned to categories Post = a single post within a Thread
- Go to disqus.com/api Use OAuth if acting on behalf of another Disqus, user Use pre-gen access token if acting on own behalf, doesn’t expire(?)
- “Unique domain” = form ID
- Enable guest posting in the control panel for your forum, not the API application settings. Use your own api_secret, and this magic api_key.
- Sweet! So we go build this cool new application with Disqus as our primary database.
- In case you’re wondering, this is a cruise missile powered 1967 Chevy Paul Stender, rocket-powered car urban legend
- Disqus breaks, will it break your site?
- Whoever said “[read quote]” wasn’t a computer programmer, because this is what happens when things go right:
- Your client’s website makes it to the front page of Reddit Or it’s featured on Undercover Boss Lack of control, Network latency, API rate limits
- That was easy…
- Disqus isn’t playing second fiddle Must keep the cache expiration really short or cache will be too stale
- Expires too soon: lose redundancy Expires too late: lose viewers New post submitted Moderator actions (approve, delete)
- Fetch resource from burst cache Cache fail: fetch resource from Disqus Write resource to burst and failover caches
- Fetch resource from burst cache Cache fail: fetch resource from Disqus Disqus fail: fetch resource from failover cache
- Backend process periodically pings Disqus and records health status in burst cache Fetch resource from burst cache Cache fail: fetch health status from burst cache Heartbeat fail: fetch resource from failover cache
- Wrangle with caching vs Build moderation + spam checking + blacklisting + scaling issues But don’t worry…
- …this won’t hurt a bit.