anansi

README

anansi

Helper tools for go-chi

Features

• API Errors
• Logging Middleware
• Session Store
• Encryption Helpers
• JSON request and body parsing
• Extensions of faker

Install

go get -u github.com/tsaron/ansi

Example

// embed basic env in your env struct
type AppEnv struct {
    anansi.BasicEnv
}

type Book struct {
    Name `json:"book_nme"`
}

func main() {
    // BasicEnv is only compatible with envconfig ATM
    env := loadEnv()
    logs := NewLogger(env.Name)

    router := chi.NewRouter()
    chix.DefaultMiddleware(env, log, router)
    router.Get("/api/v1/books/:id", func(w http.ResponseWriter, r *http.Request) {

    })

}

Documentation

Index

• func AttachLogger(log zerolog.Logger) func(http.Handler) http.Handler
• func CORS(router *chi.Mux, appEnv string, origins ...string)
• func CompactJSON(raw []byte) []byte
• func DefaultMiddleware(router *chi.Mux, appEnv string, log zerolog.Logger)
• func DefaultRoutes(router *chi.Mux)
• func IDParam(r *http.Request, name string) uint
• func ListenForInterrupt(log zerolog.Logger, cancel context.CancelFunc)
• func LoadEnv(env interface{}) error
• func NewLogger(service string) zerolog.Logger
• func ReadBody(r *http.Request) []byte
• func ReadJSON(r *http.Request, schema ozzo.Validatable)
• func ReadJSONRaw(r *http.Request, schema interface{})
• func Recoverer(env string) func(http.Handler) http.Handler
• func RequestLogger() func(http.Handler) http.Handler
• func ResponseLogger() func(http.Handler) http.Handler
• func RunServer(port int, log zerolog.Logger, handler http.Handler)
• func SendError(r *http.Request, w http.ResponseWriter, err APIError)
• func SendJSON(r *http.Request, w http.ResponseWriter, code int, v interface{})
• func SendSuccess(r *http.Request, w http.ResponseWriter, v interface{})
• func StringParam(r *http.Request, name string) string
• type APIError
  • func (e APIError) Error() string
  • func (e APIError) Unwrap() error

Functions

func AttachLogger

func AttachLogger(log zerolog.Logger) func(http.Handler) http.Handler

stolen from https://github.com/rs/zerolog/blob/master/hlog/hlog.go

func CORS

func CORS(router *chi.Mux, appEnv string, origins ...string)

CORS sets CORS for the handler. It enables localhost by default when appEnv is not "dev".

func CompactJSON

func CompactJSON(raw []byte) []byte

CompactJSON removes insignificant space from JSON

func DefaultMiddleware

func DefaultMiddleware(router *chi.Mux, appEnv string, log zerolog.Logger)

DefaultMiddleware sets up some middlware for a router as well as liveliness(/) and not found handlers: - RequestID - RealIP - Logger(using zerolog) - Recoverer - RedirectSlashes - Compress(with compression level of 5) - Timeout(with 1 minute)

func DefaultRoutes

func DefaultRoutes(router *chi.Mux)

DefaultRoutes adds liveness(/) and Not found handlers for the passed router.

func IDParam

func IDParam(r *http.Request, name string) uint

IDParam extracts a uint URL parameter from the given request

func ListenForInterrupt

func ListenForInterrupt(log zerolog.Logger, cancel context.CancelFunc)

func LoadEnv

func LoadEnv(env interface{}) error

LoadEnv loads environment variables into Env

func NewLogger

func NewLogger(service string) zerolog.Logger

func ReadBody

func ReadBody(r *http.Request) []byte

ReadBody extracts the bytes in a request body without destroying the contents of the body

func ReadJSON

func ReadJSON(r *http.Request, schema ozzo.Validatable)

ReadJSON is `ReadBody` except that it decodes JSON and validates the result.

func ReadJSONRaw

func ReadJSONRaw(r *http.Request, schema interface{})

ReadJSONRaw is ReadJSON for arrays/maps. Was too lazy to generalise or name well.

func Recoverer

func Recoverer(env string) func(http.Handler) http.Handler

Recoverer creates a middleware that handles panics from chi controllers. It uses the passed interpreters to try to convert errors to APIErrors where possible otherwise it returns a 500 error. When the panic is an APIError or is interpreted as one, it sends a response with the right error code. TODO: add support for wrapped errors in APIError.

func RequestLogger

func RequestLogger() func(http.Handler) http.Handler

RequestLogger updates a future log entry with the request parameters such as request ID and headers.

func ResponseLogger

func ResponseLogger() func(http.Handler) http.Handler

func RunServer

func RunServer(port int, log zerolog.Logger, handler http.Handler)

func SendError

func SendError(r *http.Request, w http.ResponseWriter, err APIError)

SendError sends a JSON error message

func SendJSON

func SendJSON(r *http.Request, w http.ResponseWriter, code int, v interface{})

SendJSON response writes a JSON encoded version of `v` to the writer, making sure what deserves to be logged gets logged

func SendSuccess

func SendSuccess(r *http.Request, w http.ResponseWriter, v interface{})

SendSuccess sends a JSON success message with status code 200

func StringParam

func StringParam(r *http.Request, name string) string

StringParam basically just ensures the param name is correct. You might not need this method unless you're too lazy to do real tests.

Types

type APIError

type APIError struct {
	Code    int         `json:"-"`
	Message string      `json:"message"`
	Meta    interface{} `json:"meta"`
	Err     error       `json:"-"`
}

APIError is a struct describing an error

func (APIError) Error

func (e APIError) Error() string

implements the error interface

func (APIError) Unwrap

func (e APIError) Unwrap() error