Go-Contacts

A Contact Manager App built in Go Programming Language. This app implemented the REST API and the GraphQL. One can register and login, and then create, update, delete contacts, and also get a list of contacts.

Dependencies

This project is implemented and tested using go version go1.12 linux/amd64

To install the dependencies list below, type go get <package name>

• golang.org/x/crypto/bcrypt
• github.com/gorilla/mux
• github.com/99designs/gqlgen
• github.com/mattn/go-sqlite3
• github.com/dgrijalva/jwt-go
• github.com/google/uuid
• github.com/joho/godotenv

Install

Use the following command to clone this project

git clone git@github.com:zijuexiansheng/go-contacts.git

It is recommended to clone this project into your $GOPATH/src directory. Some other untested approaches including adding the directory to your $GOPATH, or use go mod.

Configuration

The server can be configured by changing the /path/to/repo/.env file. The following parameters can be changed.

• db_name: the SQLite database name (default: gocontacts.db)
  • You can copy the default.db in this repository to this name and run tests on it
• port: (default: 8000)
• site_root: the root path to the service (default: /go-dmo)
  • This is how we defined $SITEROOT that will be used in the REST API and GraphQL below.
  • Suppose that the servers listens on http://localhost:8000
  • site_root is set to be /go-demo
  • $SITEROOT will then be http://localhost:8000/go-demo
  • $SITEROOT/api will be http://localhost:8000/go-demo/api
• token_password: A secret token password. Please set one by yourself. This password should be kept secret
• graph_complexity: The complexity of GraphQL queries (default: 200). This parameter is used to prevent heavy-loaded request that could overload the server, particularly the database system
• test_ql: If set to 1, one can open the $SITEROOT and test the GraphQL, as in the examples in the screenshots. If set to 0 (default), then the $SITEROOT will only return a greeting
  • N.B., for requests requiring authorizations, please use curl or Postman to login and acquire the token first, and then add the token to the Header. See the "Authorization" in the "HTTP HEADERS" in gql-7 for an example (ignore the "Authorization-1" and "Authorization-3")

Run

• Go to the repository directory (make sure the directory is listed in the $GOPATH)
• Copy the default.db to any database file name (say cp default.db gocontacts.db)
• Change the configuration file /path/to/repo/.env as you wish
  • and remember to change the db_name
• go run main.go
• Use curl or Postman to test the REST API (also GraphQL)
• If test_ql = 1, then you can go to $SITEROOT and use the Playground to try with the GraphQL.
  • See screenshots for examples

REST API

• All the requests should go to $SITEROOT/api/...
• To read the REST API, click here

GraphQL

• All the requests should go to $SITEROOT/graphql
• To read the GraphQL schema, click here
• Visit here for some screenshots

License

MIT License