memonic Scalable applications with HTTP Patrice Neff, co-founder Memonic [email protected] twitter.com/pneff 20100407
Scalable applications with HTTP
Jul 03, 2015
Talks about the HTTP protocol and how it can be used for a service-oriented architecture.
This was presented at the Internet Briefing developer conference on April 7, 2010 in Zurich, Switzerland.
This was presented at the Internet Briefing developer conference on April 7, 2010 in Zurich, Switzerland.
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memonic
Scalable applications with HTTPPatrice Neff, co-founder Memonic
[email protected]/pneff
20100407
© memonic
Memonic
• Founded in 2009
• Your personal digital notebook
• Easy web research
• Try it out for free: www.memonic.com
© memonic
About me
• Web developer
• Co-Founder Memonic
• Previously frontend developer at local.ch
• Details & Blog: patrice.ch
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I’ll talk about...
• Service-oriented architectures
• Motivation
• HTTP, the protocol
• Real-world example
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Glossary
Performance Scalability
©Prosper973 ©Kelinz1
Internet
Web ServerDB
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Service-oriented architectures
Internet
Frontend
Service 1 Service 3Service 2
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Key points
• Dependencies local to service• Database
• Queue
• Synchronization
• Try the simplest service that works
• Services are the new classes?Internet
Frontend
Service 1 Service 3Service 2
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Motivation
• Modularity• Team separation
• Clear boundaries
• Easier migrations / replacements
• Re-use of services
• Best tool for the job• Programming language
• Dependencies (Database, Queue, ...)
• Scalability
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Disadvantages
• Complex full-picture view
• Performance
• Data joins
©Eddi 07
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HTTP
• RFC 2616 defines HTTP 1.1
• Text protocol is debuggable
• Solved problems:• Caching
• Compression
• Error handling
• Authentication
• Content negotiation
• Documentation
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HTTP Example
GET /intl/en/about.html HTTP/1.1Host: www.google.ch
HTTP/1.1 200 OKDate: Wed, 24 Mar 2010 20:51:06 GMTExpires: -1Cache-Control: private, max-age=0Content-Type: text/html; charset=ISO-8859-1Server: gwsX-XSS-Protection: 0
<!doctype html>...
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Caching
• Cache-Control response header:• Allow or prohibit caching
• Specify cache validity
• ETag response header:• Client can validate it’s cache content
• Avoids re-transmission of content
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Caching Example
GET /1/83.76.244.123 HTTP/1.1Host: geoipAccept: application/json
HTTP/1.1 200 OKCache-Control: max-age=31536000Expires: Fri, 25 Mar 2011 17:28:44 GMTContent-Type: application/json; charset=UTF-8Content-MD5: a59a841c05fdddef931399ef2275f6d3
{"country_code": "CH"}
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Memonic Architecture
Internet
Frontend
staticpagegeoip
browser
html_cleanupmime
user label storage
screenshot
index
pipeline
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Links
http://www.memonic.com/user/pneff/set/presentation-http-scalability
or: http://mem.to/t/1Fsc
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