Building RESTful Web services with Go_ Learn how to build powerful RESTful APIs with Golang that scale gracefully ( PDFDrive com )

Building RESTful Web Services with Go Learn how to build powerful RESTful APIs with Golang that scale gracefully Naren Yellavula BIRMINGHAM - MUMBAI Building RESTful Web Services with Go Copyright © 2017 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. First published: December 2017 Production reference: 1261217 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78829-428-7 www.packtpub.com Credits Author Naren Yellavula Copy Editors Dhanya Baburaj Safis Editing Reviewer Anshul Joshi Project Coordinator Sheejal Shah Commissioning Editor Aaron Lazar Proofreader Safis Editing Acquisition Editor Denim Pinto Indexer Rekha Nair Content Development Editor Sreeja Nair Graphics Jason Monteiro Technical Editor Rutuja Vaze Production Coordinator Nilesh Mohite About the Author Naren Yellavula — fondly called by the developer community as Naren Arya — started his programming career in the funniest way. He ditched mechanical engineering for computer science after watching The Matrix for the first time. With dreams of coding a mini world, he continuously sharpened his practical skills. Initially, he built few a mobile applications. Then, he completely moved into the space of full stack development. He always believed that computers and software can help make this world a better place. He wrote 120+ development articles on various open source technologies, including Go and Python. He is also one of the few young speakers at the PyCon India conference (he spoke at Bangalore in 2015 and Delhi in 2017). With detailed knowledge of web scraping and REST APIs, he dived into multiple domains such as cloud telephony and cloud-based web services. On this journey, he bathed in a lot of design decisions. He currently works as a software engineer for Citrix R&D, India. Naren is a great fan of Go personally because of the speed and intuitiveness of the language. In his spare time, he tries to educate the youth in programming and software development. He loves reading nonfiction most of the time, and Victorian and Russian fiction sometimes. Acknowledgments I would like to thank my grandmother, Tayamma, for raising me to be helpful to others by sharing my knowledge in every possible way. She was the one who always taught me how to put in serious effort with 100% dedication, and not worry much about results. Therefore, I dedicate this book to her, to my inspiration. I also cannot understate the support given by my father, Venkataiah Yellavula; mother, ShobaRani Dasyam; and lovely younger brother Saikiran, who understood the value of the time I spent on this book and always encouraged me with their positive wishes. I am grateful to my mentor, Chandrashekar MuniBudha, Solutions Architect, Amazon Web Services, whom I am deeply indebted to. I also thank Ashwin Baskaran, Senior Director, Citrix, who encouraged and pushed me forward in all possible ways. Thank you! I cannot name everyone here; the list is so big. However, I sincerely thank all my friends who always wished success for this book. About the Reviewer Anshul Joshi is a data scientist with experience in recommendation systems, predictive modeling, neural networks, and high-performance computing. His research interests encompass deep learning, artificial intelligence, and computational physics. Most of the time, he can be found exploring GitHub or trying anything new he can get his hands on. His blog can be found at https:/ 󰜌 / 󰜌 anshuljoshi. 󰜌 com/ 󰜌 . www.PacktPub.com For support files and downloads related to your book, please visit www.PacktPub.com . Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.PacktPub.com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at service@packtpub.com for more details. At www.PacktPub.com , you can also read a collection of free technical articles, sign up for a range of free newsletters and receive exclusive discounts and offers on Packt books and eBooks. https:/ 󰜌 / 󰜌 www. 󰜌 packtpub. 󰜌 com/ 󰜌 mapt Get the most in-demand software skills with Mapt. Mapt gives you full access to all Packt books and video courses, as well as industry-leading tools to help you plan your personal development and advance your career. Why subscribe? Fully searchable across every book published by Packt Copy and paste, print, and bookmark content On demand and accessible via a web browser Customer Feedback Thanks for purchasing this Packt book. At Packt, quality is at the heart of our editorial process. To help us improve, please leave us an honest review on this book's Amazon page at https:/ 󰜌 / 󰜌 www. 󰜌 amazon. 󰜌 com/ 󰜌 dp/ 󰜌 1788294289 . If you'd like to join our team of regular reviewers, you can email us at customerreviews@packtpub.com . We award our regular reviewers with free eBooks and videos in exchange for their valuable feedback. Help us be relentless in improving our products! Table of Contents Preface 1 Chapter 1: Getting Started with REST API Development 7 Types of web services 8 REST API 9 Characteristics of REST services 10 REST verbs and status codes 11 GET 13 POST, PUT, and PATCH 14 DELETE and OPTIONS 15 Cross-Origin Resource Sharing (CORS) 16 Types of status codes 17 2xx family (successful) 18 3xx family (redirection) 18 4xx family (client error) 18 5xx family (server error) 19 Rise of REST API with Single Page Applications 19 Old and new ways of data flow in SPA 20 Why Go for REST API development? 22 Setting up the project and running the development server 22 Demystifying GOPATH 23 Building our first service – finding the Roman numeral 25 Breaking down the code 29 Live reloading the application with supervisord and Gulp 30 Monitoring your Go web server with supervisord 30 Installing supervisord 30 Using Gulp for creating auto code compiling and server reloading 32 Understanding the gulpfile 34 Summary 35 Chapter 2: Handling Routing for Our REST Services 36 Getting the code 37 Understanding Go's net/http package 37 Running the code 38 ServeMux, a basic router in Go 38 Running the code 40 Adding multiple handlers using ServeMux 40

Building RESTful Web services with Go_ Learn how to build powerful RESTful APIs with Golang that scale gracefully ( PDFDrive com )

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