Make RESTful API with Go

Introduce a way to create RESTful API with Go, but without framework. (프레임워크 없이 Go로 RESTful API 만드는 방법 소개)

Transcript

1. Make RESTful API with Go
   MinJae Kwon (@mingrammer)
   2017.04.15 GDG Incheon Web Seminar
   (without framework)
   

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2. Name
   ӂ޹੤ (MinJae Kwon)
   Nickname
   @mingrammer
   Email
   k239507@gmail.com
   Who
   ই઱؀೟Ү ࣗ೐౟ਝয೟җ 3೟֙ / Backend Developer
   Blog
   https://mingrammer.com
   Facebook
   https://facebook.com/mingrammer
   Github
   https://github.com/mingrammer
   Eng Blog
   https://medium.com/@mingrammer
   

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3. 2. Why Go?
   4. Implementation of REST API
   3. API Design & Architecture
   Contents
   5. Review & Next
   1. RESTful? REST API?
   

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4. RESTful? REST API?
   

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5. RESTful? REST API?
   REpresentational State Transfer
   +
   Application Programming Interface
   REST API?
   

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6. RESTful? REST API?
   REST API?
   HTTP ࢸ҅੄ ੢੼ਸ ୭؀ೠ ࢓ܽ API ইఃఫ୊
   ೯ਤ
   Verb
   ಴അ
   Representation
   ੗ਗ
   Resource
   (REST API੄ 3ਃࣗ)
   

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7. RESTful? REST API?
   Client API Server
   POST
   Create
   GET
   Retrieve
   PUT/PATCH
   Update
   DELETE
   Delete
   DB Server
   REST API?
   Simple REST Flow (Client - Server)
   

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8. RESTful? REST API?
   Why REST API?
   Stateless Cacheable
   Uniform
   Interface
   Fully
   Client - Server
   Hierarchical
   Structure
   Self
   Descriptiveness
   

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9. RESTful? REST API?
   Yes! Let’s make REST API!
   

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10. Why Go?
    

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11. Why Go?
    1. ೧ࠁҊ रযࢲ
    
    2. ೐ۨ੐ਕ௼о ೙ࣻח ইש
    
    3. ղ੢ ಁః૑о ъ۱
    
    4. MSAী ੸೤
    
    5. ࠽٘ ߂ ߓನо ए਑
    Because Go is AWESOME
    

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12. Why Go?
    Goܳ ҕࠗೞח ੑ੢ীࢲ Go۽ API ೠ ߣ ٜ݅যࠁҊ र঻਺
    ղ੢ ಁః૑о ъ۱೧ ߹ب੄ ೐ۨ੐ਕ௼ হ੉ب ѐߊ੉ оמ
    MSA (Micro Service Architecture)ী ੸೤
    ࠽٘ ߂ ߓನо औҊ рಞ
    +
    +
    +
    +
    పझ౟ ಞೣ
    ࢿמ જ਺
    ޙࢲച ಞೣ
    …
    

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13. Why Go?
    Yes, Go is AWESOME
    

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14. API Design & Architecture
    

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15. API Design & Architecture
    Let’s make REST API for simple todo application
    

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16. API Design & Architecture
    Client Auth DB
    Todo APIs
    Simple Architecture
    

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17. API Design & Architecture
    Not Yet …
    Client Auth DB
    Todo APIs
    Simple Architecture
    

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18. API Design & Architecture
    Client DB
    Todo APIs
    Public now
    Simple Architecture
    

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19. API Design & Architecture
    Models
    User Project
    Project
    Project
    Task
    Task
    Task
    1 : n 1 : n
    

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20. API Design & Architecture
    Models
    User Project
    Project
    Project
    Task
    Task
    Task
    1 : n 1 : n
    Not Yet …
    

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21. API Design & Architecture
    Models
    Project
    Project
    Project
    Task
    Task
    Task
    1 : n
    

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22. API Design & Architecture
    Models
    Project
    Title :: string
    Archived :: bool
    Task
    Title :: string
    Priority :: enum
    Deadline :: datetime
    Done :: bool
    ProjectID :: int
    1 : n
    

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23. API Design & Architecture
    /projects
    • GET : Get all projects
    • POST : Create a new project
    /projects/:title
    • GET : Get a project
    • PUT : Update a project
    • DELETE : Delete a project
    /projects/:title/archive
    • PUT : Archive a project
    • DELETE : Restore a project
    Projects API Design
    

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24. API Design & Architecture
    /projects/:title/tasks
    • GET : Get all tasks of a project
    • POST : Create a new task in a project
    /projects/:title/tasks/:id
    • GET : Get a project of a project
    • PUT : Update a project of a project
    • DELETE : Delete a project of a project
    /projects/:title/tasks/:id/complete
    • PUT : Archive a project of a project
    • DELETE : Restore a project of a project
    Tasks API Design
    

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25. API Design & Architecture
    /projects
    • GET : Get all projects
    • POST : Create a new project
    /projects/:title
    • GET : Get a project
    • PUT : Update a project
    • DELETE : Delete a project
    /projects/:title/archive
    • PUT : Archive a project
    • DELETE : Restore a project
    /projects/:title/tasks
    • GET : Get all tasks of a project
    • POST : Create a new task in a project
    /projects/:title/tasks/:id
    • GET : Get a project of a project
    • PUT : Update a project of a project
    • DELETE : Delete a project of a project
    /projects/:title/tasks/:id/complete
    • PUT : Archive a project of a project
    • DELETE : Restore a project of a project
    API Design
    

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26. API Design & Architecture
    ├── app
    │ ├── app.go
    │ ├── handler
    │ │ ├── common.go
    │ │ ├── projects.go
    │ │ └── tasks.go
    │ └── model
    │ └── model.go
    ├── config
    │ └── config.go
    └── main.go
    Application Structure
    Our API core handlers
    Common response functions
    APIs for Project model
    APIs for Task model
    Models for our application
    Configuration
    Init, route and run the app
    

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27. Implementation of REST API
    

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28. Implementation of REST API
    https://github.com/mingrammer/go-todo-rest-api-example
    All source code is on following repository
    

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29. Implementation of REST API
    ├── app
    │ ├── app.go
    │ ├── handler
    │ │ ├── common.go
    │ │ ├── projects.go
    │ │ └── tasks.go
    │ └── model
    │ └── model.go
    ├── config
    │ └── config.go
    └── main.go
    app/app.go
    Initialize the app
    Set all routers to app
    Register all handlers to app
    Run the app
    

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30. Implementation of REST API
    app/app.go
    app/app.go੄ ੹୓ ҳઑ
    

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31. Implementation of REST API
    app/app.go
    1. ಁః૑ ࢶ঱ ߂ ೙ਃೠ ಁః૑ ੐ನ౟
    github.com/gorilla/mux : ղ੢ ಁః૑ࠁ׮ ખ ؊ ಞܻೞѱ ࢎਊೡ ࣻ ੓ח Mux ۄ੉࠳۞ܻ
    github.com/jinzhu/gorm : Goਊ ORM ۄ੉࠳۞ܻ
    

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32. Implementation of REST API
    app/app.go
    ۄ਋ఠ۽ github.com/gorilla/mux੄ Router ࢎਊ
    DB۽ github.com/jinzhu/gorm੄ DB ࢎਊ
    2. ۄ਋ఠ৬ DBܳ ыחApp ҳઑ୓ ࢶ঱
    

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33. Implementation of REST API
    app/app.go
    3. App ୡӝചܳ ਤೠ Initialize ೣࣻ ੿੄
    

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34. Implementation of REST API
    app/app.go
    4. Appী ݽٚ API ۄ਋౴
    

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35. Implementation of REST API
    app/app.go
    5. HTTP Methodী ٮܲ ۄ਋ఠ ېಌ ೣࣻ ੿੄
    

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36. Implementation of REST API
    app/app.go
    6. Project API ೩ٜ۞ ഐ୹ ߂ ١۾
    

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37. Implementation of REST API
    app/app.go
    7. Task API ೩ٜ۞ ഐ୹ ߂ ١۾
    

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38. Implementation of REST API
    app/app.go
    8. HTTP࢚ীࢲ API Serverܳ ڸ਋ח Run ೣࣻ ੿੄
    

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39. ├── app
    │ ├── app.go
    │ ├── handler
    │ │ ├── common.go
    │ │ ├── projects.go
    │ │ └── tasks.go
    │ └── model
    │ └── model.go
    ├── config
    │ └── config.go
    └── main.go
    Implementation of REST API
    Provide shared functions
    Make response with JSON
    handler/common.go
    

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40. handler/common.go੄ ੹୓ ҳઑ
    Implementation of REST API
    handler/common.go
    

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41. Implementation of REST API
    handler/common.go
    1. ಁః૑ ࢶ঱ ߂ ೙ਃೠ ಁః૑ ੐ನ౟
    

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42. 2. JSON ನݘਵ۽ ਽׹ਸ ࢤࢿೞח ೣࣻ ੿੄
    Implementation of REST API
    handler/common.go
    

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43. 3. JSON ನݘਵ۽ ী۞ ਽׹ਸ ࢤࢿೞח ೣࣻ ੿੄
    Implementation of REST API
    handler/common.go
    

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44. ├── app
    │ ├── app.go
    │ ├── handler
    │ │ ├── common.go
    │ │ ├── projects.go
    │ │ └── tasks.go
    │ └── model
    │ └── model.go
    ├── config
    │ └── config.go
    └── main.go
    Implementation of REST API
    handler/projects.go
    Provide handlers for Project
    Perform queries for Project data
    

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45. handler/projects.go੄ ੹୓ ҳઑ
    Implementation of REST API
    handler/projects.go
    

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46. Implementation of REST API
    handler/projects.go
    1. ಁః૑ ࢶ঱ ߂ ೙ਃೠ ಁః૑ ੐ನ౟
    

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47. 2. /projects ೩ٜ۞ ੘ࢿ
    Implementation of REST API
    handler/projects.go
    GET : /projects : Get all projects
    POST : /projects : Create a new project
    

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48. 3. /projects/:title ೩ٜ۞ ੘ࢿ
    Implementation of REST API
    handler/projects.go
    GET : /projects/:title : Get a project
    PUT : /projects/:title : Update a project
    DELETE : /projects/:title : Delete a project
    

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49. 4. /projects/:title/archive ೩ٜ۞ ੘ࢿ
    Implementation of REST API
    handler/projects.go
    PUT : /projects/:title/archive : Archive a
    project
    DELETE : /projects/:title/archive : Restore
    a project
    

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50. 5. ױੌ ೐۽ં౟ܳ оઉয়ח ௪ܻ ېಌ ੘ࢿ
    Implementation of REST API
    handler/projects.go
    

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51. ├── app
    │ ├── app.go
    │ ├── handler
    │ │ ├── common.go
    │ │ ├── projects.go
    │ │ └── tasks.go
    │ └── model
    │ └── model.go
    ├── config
    │ └── config.go
    └── main.go
    Implementation of REST API
    handler/tasks.go
    Provide handlers for Task
    Perform queries for Task data
    

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52. handler/projects.go੄ ੹୓ ҳઑ
    Implementation of REST API
    handler/tasks.go
    

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53. Implementation of REST API
    1. ಁః૑ ࢶ঱ ߂ ೙ਃೠ ಁః૑ ੐ನ౟
    handler/tasks.go
    

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54. 2. /projects/:title/tasks ೩ٜ۞ ੘ࢿ
    Implementation of REST API
    GET : /projects/:title/tasks: Get all
    tasks of a project
    POST : /projects/:title/tasks: Create a
    new task in a project
    handler/tasks.go
    

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55. 3. /projects/:title/tasks/:id ೩ٜ۞ ੘ࢿ
    Implementation of REST API
    GET : /projects/:title/tasks/:id : Get a task
    of a project
    PUT : /projects/:title/tasks/:id: Update a
    task of a project
    DELETE : /projects/:title/tasks/:id : Delete
    a task of a project
    handler/tasks.go
    

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56. 3. /projects/:title/tasks/:id ೩ٜ۞ ੘ࢿ (continue)
    Implementation of REST API
    GET : /projects/:title/tasks/:id : Get a task
    of a project
    PUT : /projects/:title/tasks/:id: Update a
    task of a project
    DELETE : /projects/:title/tasks/:id : Delete
    a task of a project
    handler/tasks.go
    

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57. 4. /projects/:title/tasks/:id/complete ೩ٜ۞ ੘ࢿ
    Implementation of REST API
    PUT : /projects/:title/tasks/:id/complete :
    Complete a task of a project
    DELETE : /projects/:title/tasks/:id/complete :
    Undo a task of a project
    handler/tasks.go
    

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58. 5. ױੌ కझ௼ܳ оઉয়ח ௪ܻ ېಌ ੘ࢿ
    Implementation of REST API
    handler/tasks.go
    

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59. ├── app
    │ ├── app.go
    │ ├── handler
    │ │ ├── common.go
    │ │ ├── projects.go
    │ │ └── tasks.go
    │ └── model
    │ └── model.go
    ├── config
    │ └── config.go
    └── main.go
    Implementation of REST API
    model/model.go
    Define the model structs with Gorm
    Provide some methods of models
    Provide a DB migration function
    

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60. model/model.go੄ ੹୓ ҳઑ
    Implementation of REST API
    model/model.go
    

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61. Implementation of REST API
    model/model.go
    1. ಁః૑ ࢶ঱ ߂ ೙ਃೠ ಁః૑ ੐ನ౟
    

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62. 2. ప੉࠶ ݽ؛ ߂ ݽ؛ ؘ੉ఠ ઑ੘ী ೙ਃೠ ݫࢲ٘ ੿੄
    Implementation of REST API
    model/model.go
    

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63. 3. ੿੄ೠ ݽ؛ਸ पઁ ؘ੉ఠ߬੉झী ੸ਊೞח ݃੉Ӓۨ੉࣌ ೣࣻ ੘ࢿ
    Implementation of REST API
    model/model.go
    ݃੉Ӓۨ੉࣌җ ೣԋ Foreign Keyܳ ࢎਊೠ Relationshipө૑ ࢤࢿ
    

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64. ├── app
    │ ├── app.go
    │ ├── handler
    │ │ ├── common.go
    │ │ ├── projects.go
    │ │ └── tasks.go
    │ └── model
    │ └── model.go
    ├── config
    │ └── config.go
    └── main.go
    Implementation of REST API
    config/config.go
    Provide a struct for configuration
    Config values is predefined
    

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65. 1. Config ҳઑ୓৬ DBConfig ҳઑ୓ ੿੄
    Implementation of REST API
    config/config.go
    DBCofingܳ ࢚ਤ Config ҳઑ୓ী ੐߬٬
    

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66. 2. Predefined ࢸ੿чਸ о૓ Config ੋझఢझܳ ߈ജೞח ೣࣻ ੘ࢿ
    Implementation of REST API
    config/config.go
    

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67. ├── app
    │ ├── app.go
    │ ├── handler
    │ │ ├── common.go
    │ │ ├── projects.go
    │ │ └── tasks.go
    │ └── model
    │ └── model.go
    ├── config
    │ └── config.go
    └── main.go
    Implementation of REST API
    main.go
    Main for running the app
    

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68. 1. Appী Config ੋझఢझܳ ੹׳೧ ୡӝച ೠ ٍ ࢲߡ प೯
    Implementation of REST API
    main.go
    

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69. Implementation of REST API
    Then
    $ go build
    $ ./go-todo-rest-api-example
    

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70. Implementation of REST API
    http://127.0.0.1:3000/projects/title/tasks/3
    Test Example
    

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71. Implementation of REST API
    Congraturation!!
    You have a REST API written in Go now!
    

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72. Review & Next
    

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73. Review & Next
    Q. ௏٘о ੉ࢂо?
    Go ঱য ੗୓۽݅ ࠁݶ, ঱যী ࠂ੟ೠ ѐ֛ب ݆੉ হҊ ޙߨ੉ рѾೞݴ ղ
    ੢ ಁః૑о ೧઱ח ੌ੉ ݆ӝ ٸޙী ੹୓੸ੋ ௏٘੄ оةࢿ੉ ڄয૑૓ ঋ
    ਵݴ Gofmtۄח ో୓ੋ੉ ੓য ௏٘੄ ੌҙࢿਸ ਬ૑ೡ ࣻ ੓׮ח ੢੼੉ ੓
    ਺
    ૒੽ ѐߊೠ ҙ੼ীࢲ ࠁ੗ݶ, যו ੿ب ੹୓੸ੋ ҳઑܳ ࢤпೞҊ ࢸ҅৬ ௏
    ٘ ѐߊਸ ೮ӝ ٸޙী അ੤ ࢚క۽ח աࢁ૑ ঋ׮Ҋ ࢤпೣ. 

    

    ׮݅, Go۽ REST API ѐߊ੉ ୊਺੉ӝب ೞҊ, ೐ۨ੐ਕ௼١ਸ ࢎਊೞ૑ ঋ
    ওӝী ୶࢚ചա ௏٘੄ ҳઑച١਷ ই૒ ؏ ૓೯غ঻׮Ҋ ࢤпೞݴ, ৈ੹൤
    ѐࢶ੄ ৈ૑ח ҔҔী ࠁ੐.
    Review
    

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74. Q. ѐߊ դ੉بח যڃо?
    ૑ਗغח ղ੢ ಁః૑о ೂࠗೞݴ, খࢲ ঱ә೮٠੉ ঱যо рѾೞѱ ٸޙী
    ѐߊ ੘স ੗୓ח ҭ੢൤ ࣻਘ೮਺.
    դ੉بۄҊ ೠ׮ݶ, য়൤۰ ੹୓੸ੋ ࢸ҅৬ ௏٘ ҳઑച৬ ҙ۲ػ դ੉بܳ
    ݈ೡ ࣻ ੓חؘ, ੉ח REST API੉ա ਢѐߊ ژח ইఃఫ୛੄ ૑ध੉ա ҃೷
    ী ٮۄ ׳ۄ૕ Ѫ э਺
    Review & Next
    Review
    

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75. Q. ೐ۨ੐ਕ௼ হ੉ ൨ٜ૑ ঋ਷о?
    ਗېח ઱۽ Pythonਵ۽ ਢѐߊҗ API ѐߊਸ ೧৳חؘ, Python੄ ҃਋ ࢎ
    प ೐ۨ੐ਕ௼ হ੉ ѐߊೞӝо ࢚׼൤ য۰਎ ࣻ ੓ਵݴ Flaskա Django١
    ੄ ೐ۨ੐ਕ௼ח Ѣ੄ ೙ࣻ੐
    Ӓ۞ա Goীࢲח ঱য ରਗীࢲ ઁҕೞח ղ੢ ಁః૑ੋ net/http۽ب ୽࠙
    ೮਺. ౠ൤, Pythonীࢲ੄ Flaskա Djangoীࢲח ੗୓੸ਵ۽ ઁҕೞח ੜ
    ୶࢚ചػ ೣٜࣻਸ ࢎਊೞח ߑधҗ Goীࢲ੄ ղ੢ ಁః૑ܳ ࢎਊೞח ߑध
    ੉ Ѣ੄ ࠺त೮ӝ ٸޙী, ٮ۽ ೐ۨ੐ਕ௼੄ ೙ਃࢿ਷ ޅו՝
    ޛۿ, ա੄ ҃਋ gorilla/mux৬ gormਸ оઉ׮ ॳӟ ೮૑݅ ੉ח ױࣽ൤
    net/http੄ ખ ؊ ಞܻೠ ېಌ ӒܻҊ ORM੉ӝ ٸޙী ೙ਃೠ ҃਋ী݅ ݽ
    ٕ୊ۢ ॶ ࣻ ੓਺. ૊, ೙ਃೠ ࠗ࠙ী ೧׼ೞח ੘਷ ۄ੉࠳۞ܻٜਸ оઉ׮
    ॳݶ غӝ ٸޙী ಽझఖ ೐ۨ੐ਕ௼ח ই૒ө૓ ೙ਃࢿਸ ޅו՝
    Review & Next
    Review
    

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76. Q. Ӓۧ׮ݶ Auth, Sessions ١ਸ ਤೠ ۄ੉࠳۞ܻח ݆਷о?
    Review & Next
    ղо ࢎਊ೮؍ gorilla/mux੄ gorillaۄҊ ೞח ਢోఉীب gorilla/sessionsо
    ੓ਵݴ, jwt-go৬ э਷ ৈ۞ ࣁ࣌੉ա ࠁউ ҙ۲ ۄ੉࠳۞ܻٜ੉ ઓ੤ೞҊ ੓਺.
    Go۽ ٜ݅য૓ ೐ۨ੐ਕ௼ীࢲب ੗୓੸ਵ۽ ૑ਗೞח ҃਋ب ੓ਵݴ, ೐ۨ੐ਕ௼
    ܳ ॳ૑ ঋח׮Ҋ೧ب ਤ৬ э਷ Ѫٜਸ оઉ׮ ॶ ࣻ ੓਺.
    Goח ޷ٜਝয ׮ܖӝо ೩ٜ۞ ׮ܖחѪҗ ௼ѱ ׮ܳѱ হয য۵૑ ঋӝ ٸޙী
    ۄ੉࠳۞ܻ݅ оઉ৬ࢲ ਤ੄ ӝמٜਸ ҳഅೞחѱ ࣻਘೡ ࣻ ੓਺
    Review
    

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77. Review & Next
    Q. ҙܻ ژח ഛ੢ࢿ਷ જ਷о?
    ਋ࢶ Goܳ ੉޷ ॄࠌѢա ॳҊ ੓׮ח о੿ೞীࢲח, ѐੋ੸ਵ۽ח গ೒ܻா
    ੉࣌ ਬ૑ࠁࣻ৬ ഛ੢ࢿ਷ ݒ਋ ਋ࣻೞ׮Ҋ ࢤпೣ
    ௼۽झ ஹ౵ੌ੉ ૑ਗغݴ, ױੌ ߄੉ցܻ۽ ஹ౵ੌ੉ غӝ ٸޙী MSAী ҭ
    ੢൤ ੸೤೧ ഛ੢ࢿ੉ ҭ੢൤ જਵݴ, খࢲ ݈೮٠੉, ਢ ೐ۨ੐ਕ௼ী ؀ೠ ઙ
    ࣘࢿب ߹۽ হӝ ٸޙী ਗೞח ಁః૑ٜ݅ਸ оઉ׮о ݽٕ୊ۢ ॶ ࣻ ੓য
    ഛ੢੉ա ழझఠ݃੉૚੉ ಞܻೣ
    ژೠ go fmtա go test ӒܻҊ go docҗ э਷ ղ੢ ో୓ੋਸ ࢎਊೞݶ ௏
    ٘ ੌҙࢿ ਬ૑, పझ౟ ӒܻҊ ޙࢲചب ݒ਋ औҊ ಞܻೞѱ ೡ ࣻ ੓਺
    ಁః૑ ҙܻ੄ ҃਋ীח, ই૒ Go ౱ীࢲ ҕध੸ਵ۽ ѐߊೞҊ ੓ח ಁః૑
    ݒפ੷о ߬ఋ ߡ੹੉ӝ ٸޙী ઑӘ ইए਍х੉ ੓ӟೞ૑݅ അઓೞח glide
    ܳ ࢎਊೡ ࣻب ੓Ҋ, റী ҕध ಁః૑ ݒפ੷ ੿ध ߡ੹੉ ܾܻૉ ػ׮ݶ ؊
    ਌ ಞܻೡ Ѫਵ۽ ࠁ੐
    Review
    

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78. Review & Next
    ޷ҳഅػ User৬ Authܳ ୶оೞৈ ࠁউө૑ Ҋ۰ೠ
    पઁ۽ ࢎਊ оמೠ REST APIܳ ࢎਊೡ ࣻ ੓ب۾ ѐࢶ
    ߓನ੄ ਊ੉ࢿਸ ഝਊೠ ߓನ ೐۽ࣁझ ୶о
    ݽٚ APIী ؀ೠ ਬ׫ పझ౟௏٘ ୶о
    ખ ؊ RESTfulೞѱ ௏٘ܳ ੘ࢿೡ ࣻ ੓ب۾ ೞח Wrapper ѐߊ
    Next
    REST API ޙࢲച (with GoDoc) + ౚషܻ঴ ઁ੘
    

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79. хࢎ೤פ׮
    MinJae Kwon (@mingrammer)
    2017.04.15 GDG Incheon Web Seminar
    Make RESTful API with Go
    

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