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An example of using the Gin framework in Go to create a JSON api with most of the core functionality a JSON api needs.

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Gin API Demo

An example of using the Gin framework in Go to create a JSON api with most of the core functionality a JSON api needs.

Installation

$ go get github.com/sbecker/gin-api-demo
$ go get github.com/tools/godep

How to run

In one terminal, run the server:

$ cd $GOPATH/src/github.com/sbecker/gin-api-demo
$ godep go run main.go

In another terminal, try making requests:

# Get all users as a non-admin - see only one user, with a subset of json attributes
$ curl -H 'Authorization: Bearer userA' -i http://localhost:8080/users
# Get all users as an admin - see all users, with all json attributes
$ curl -H 'Authorization: Bearer userB' -i http://localhost:8080/users
# Try to get all users as a non-user - get 401 Unauthorized
$ curl -i http://localhost:8080/users
# Get a single user as a non-admin - see a subset of json attributes
$ curl -H 'Authorization: Bearer userA' -i http://localhost:8080/users/1
# Get a single user as an admin - see a subset of json attributes
$ curl -H 'Authorization: Bearer userB' -i http://localhost:8080/users/1
# Try to get a different user than self - get 404 Not Found
$ curl -H 'Authorization: Bearer userA' -i http://localhost:8080/users/2
# Try to get a single user as a non-user, get 401 Unauthorized
$ curl -i http://localhost:8080/users/2

Done:

  • basic restful routing - GET /users, GET /users/:id
  • token authorization middleware
  • multi-level json serialization - display subset of json objects for non-admin users
  • separation of concerns - models, dao, resources, serializers, authorization
  • Glide for dependency management
  • UUIDs instead of integers for primary keys
  • Request-Id headers: Each API request has an associated request identifier
  • Cross-origin-request headers
  • Continuous integration
  • JSON logging
  • Env var configuration

Todo:

  • JWT token authorization
  • Pagination
  • Versioning
  • Standardize error responses
  • Integration with a real database
  • Swagger live documentation
  • Godoc
  • A test suite
  • Database migrations
  • Continuous deployment
  • Command line interface - run server, run migrations, start db console, etc
  • CLI with commands for migration, db drop/create/reset

Research:

  • Client side query language - a la GraphQL/Falkor/Datomic

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An example of using the Gin framework in Go to create a JSON api with most of the core functionality a JSON api needs.

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