Modern Web Development with Go: Build real-world, fast, efficient and scalable web server apps using Go programming language

Cover Page....2 Title Page....3 Copyright Page....4 Foreword....5 Dedication Page....6 About the Author....7 Technical Reviewers....8 Acknowledgements....9 Preface....10 Errata....12 Table of Contents....15 1. Basic Concepts of Go Programming Language....24 Introduction....24 Structure....24 Fundamentals of Go programming language....24 Advantages of Go programming language....25 Go Playground....26 Keywords....27 Packages....28 Basic data types....29 Variables....31 Type conversion....32 Constants....32 Complex data types....34 Pointers....34 Struct....35 Arrays....37 Maps....39 Control structures....40 If statement....41 Switch statement....42 For loop....43 Defer....45 Functions....47 Conclusion....52 References....52 Points to remember....52 Multiple choice questions....53 Answers....54 Questions....54 Key terms....55 2. Advanced Concepts of Go Programming Language....57 Introduction....57 Structure....57 Methods....57 Interfaces....59 Generics....62 Panics....63 Concurrency....64 Goroutines....64 Channels....65 Mutex....67 WaitGroup....68 Go Scheduler....70 Garbage collector....71 Go modules....72 Conclusion....73 Points to remember....73 Multiple choice questions....74 Answers....75 Questions....75 Key terms....75 3. Web Servers....77 Introduction....77 Structure....77 Servers....77 Web servers....79 Proxies....81 REST....82 HTTP....84 HTTP flow....85 HTTP messages....85 HTTP methods....87 HTTP status codes....87 Additional functionalities....89 HTTP and REST....89 JSON....89 JSON and Go....91 Routing....92 Conclusion....93 Points to remember....94 Multiple choice questions....94 Answers....95 Questions....95 Key terms....96 4. Setting up a Project With Go Programming Language....97 Introduction....97 Structure....97 Go installation....98 Linux....98 Windows....99 Mac....100 Setting up an IDE....101 IDE installation....101 Visual Studio Code extension for Go....101 Project creation....103 Package creation....105 Standard library....107 Third-party libraries....116 net/http package....118 Constants....118 Variables....120 Functions....122 Types....124 Simple HTTP server....125 Conclusion....126 References....127 Points to Remember....127 Multiple choice questions....127 Answers....128 Questions....128 Key terms....128 5. Design of Web Application....130 Introduction....130 Structure....130 Software development life cycle (SDLC)....131 General approaches for application design....132 Micro-kernel (plug-in) design pattern....133 Command and Query Responsibility Segregation (CQRS) design pattern....135 Combine (hybrid) design pattern....136 Layered design pattern....137 Controller (handler) layer: handling HTTP requests....139 Service (core) layer: business logic....140 Repository (data) layer: queries and database operations....141 Database layer....141 Planning phase....141 Defining business requirements....142 Defining use cases....143 Design phase....143 High-level system design....144 API design....145 Database design....147 Conclusion....149 Points to remember....149 Multiple choice questions....149 Answers....150 Questions....151 Key terms....151 6. Application Layers....153 Introduction....153 Structure....153 Code organization....154 Models....155 Main function....157 Configuration....158 HTTP server....162 Initialization....163 Start....165 Development of controller layer....165 Runners controller....166 Results controller....171 Development of service layer....173 Runners service....173 Results service....180 Conclusion....186 References....186 Points to remember....186 Multiple choice questions....187 Answers....187 Questions....188 Key terms....188 7. Relational Databases and Repository Layer....189 Introduction....189 Structure....189 Relational databases....190 SQL....192 SELECT command....193 Modification commands....194 Aggregate functions....195 JOIN....196 Table definition commands....197 PostgreSQL....199 Setting up a database....199 Repository layer....210 Database layer....233 MySQL....235 Setting up a database....235 Repository layer....243 Database layer....248 Improvements....249 Conclusion....250 References....250 Points to remember....250 Multiple choice questions....251 Answers....251 Questions....252 Key terms....252 8. NoSQL Databases and Repository Layer....253 Introduction....253 Structure....253 NoSQL databases....254 MongoDB....254 Database design....256 Read operations....256 Write operations....260 Aggregation pipeline....263 Setting up a database....265 Repository layer....272 Database layer....293 DynamoDB....295 Database design....297 Read operations....298 Write operations....301 Setting up a database....305 Repository layer....310 Database layer....328 Improvements....335 Conclusion....336 References....337 Points to remember....337 Multiple choice questions....337 Answers....338 Questions....338 Key terms....338 9. Testing....340 Introduction....340 Structure....340 Testing fundamentals....340 Manual testing....342 Testing with Go....344 Unit tests....345 Integration tests....350 Testing with Visual Studio Code....355 Conclusion....357 References....357 Points to remember....357 Multiple choice questions....358 Answers....358 Questions....359 Key terms....359 10. Security....360 Introduction....360 Structure....360 Authentication and authorization....360 API design....363 Database design....364 Models....365 HTTP server....365 Controller layer....367 Users controller....367 Other controllers....370 Service layer....371 Setting up a database....376 Repository layer....377 Testing....382 Conclusion....384 Points to remember....384 Multiple choice questions....385 Answers....385 Questions....385 Key terms....386 11. Deploying Web Application....387 Introduction....387 Structure....387 Docker....388 Setting up Docker....390 Docker commands....391 Dockerizing application....393 Docker compose....395 Kubernetes....397 Setting up a local Kubernetes cluster....398 Kubectl commands....402 Deploying on Kubernetes....403 Google Cloud Platform....410 Setting up a database....410 Deployment of a web server application....413 Conclusion....416 References....417 Points to remember....417 Multiple choice questions....417 Answers....418 Questions....418 Key terms....418 12. Monitoring and Alerting....419 Introduction....419 Structure....419 Prometheus....419 Prometheus query language....421 Setting up Prometheus....423 Custom Prometheus metrics....424 Grafana....430 Setting up Grafana....430 Creating Grafana dashboard....435 Alerting....441 Conclusion....442 References....442 Points to remember....442 Multiple choice questions....443 Answers....443 Questions....444 Key terms....444 Index....445