Table Of ContentBuilding Microservices with Go
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Nic Jackson
BIRMINGHAM - MUMBAI
Building Microservices with Go
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First published: July 2017
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Credits
Author Copy Editor
Nic Jackson Karuna Narayan
Reviewers Project Coordinator
Magnus Larsson Vaidehi Sawant
Erik Lupander
Commissioning Editor Proofreader
Kunal Parikh Safis Editing
Acquisition Editor Indexer
Karan Sadawana Francy Puthiry
Content Development Editor Graphics
Zeeyan Pinheiro Jason Monteiro
Technical Editor Production Coordinator
Vivek Pala Nilesh Mohite
About the Author
Nic Jackson is a developer advocate working for HashiCorp.com; he has over 20 years,
experience in software development and leading software development teams. A huge fan
of mobile application and microservice architecture, he is constantly looking out for the
most efficient way to reuse code and improve development flow.
In his spare time, Nic coaches and mentors at Coder Dojo teaches at Women Who Go and
GoBridge, speaks and evangelizes good coding practice, process, and technique.
About the Reviewers
Magnus Larsson has been in the IT business since 1986. He is an experienced architect in
areas such as distributed systems, systems integration, and SOA. He is currently engaged in
exploring the benefits of modern technologies such as microservices, container technologies,
reactive frameworks, and mobile solutions.
Magnus has a special dedication to the open source community for Java and has been active
in various projects over the years. He enjoys exploring other languages and currently finds
the Go language very interesting for building microservices. He is also a frequent speaker at
conferences such as Cadec, Spring I/O, Jfokus, and jDays.
Magnus lives outside Gothenburg, Sweden, with his family. When time permits, he enjoys
cross-country skiing, which must be done either on roller skis or indoors, in the Gothenburg
area for most of the year.
He has worked for large corporations such as Digital Equipment Corporation, AstraZeneca,
and Ericsson Hewlett Packard Telecom over the years. In 2000, Magnus co-founded Callista
Enterprise AB, a Swedish-based consultancy company specialized in software architecture.
Erik Lupander is a software architect and developer with over 15 years of professional
experience. A lifelong computer and software enthusiast, he wrote his first GW-BASIC
programs at the age of 7 back in the mid-80s.
Erik holds an M.Sc. in applied informatics from the University of Gothenburg and has
worked in a variety of roles in the software industry ever since. While JVM-based languages
and architecture has been his bread and butter, he is a polyglot software craftsman at heart
who, among other technologies, has embraced the Go programming language and
microservice architecture.
Erik has spoken at software conferences such as Scandev (2012), dev:mobile (2014), and
Cadec (2016, 2017) about topics ranging from OpenGL ES to Golang and microservices.
He lives just outside Gothenburg, Sweden, with his wife and two children. Aside from
family, computers, and software, he enjoys alpine skiing, golf, and running, and he is an
avid supporter of IFK Gothenburg.
Erik is currently employed by Callista Enterprise AB, a Swedish-based consultancy
specialized in software architecture. His previous employers include Siemens Medical
Solutions, Epsilon IT, University of Gothenburg, and Squeed AB.
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Table of Contents
Preface
1
Chapter 1: Introduction to Microservices
7
Building a simple web server with net/http 7
Reading and writing JSON 10
Marshalling Go structs to JSON 10
Unmarshalling JSON to Go structs 15
Routing in net/http 18
Paths 19
Convenience handlers 20
FileServer 21
NotFoundHandler 21
RedirectHandler 21
StripPrefix 21
TimeoutHandler 22
Static file handler 22
Creating handlers 23
Context 25
Background 25
WithCancel 25
WithDeadline 25
WithTimeout 26
WithValue 26
Using contexts 26
RPC in the Go standard library 29
Simple RPC example 29
RPC over HTTP 33
JSON-RPC over HTTP 34
Summary 36
Chapter 2: Designing a Great API
37
RESTful APIs 37
URIs 38
URI format 38
URI path design for REST services 39
Collections 39
