RESTIO

If you need to optimize writing Go http handlers. It is a wrapper around built-in http.Handler what means that this package supports all 3rd party mux packages as well. (for example gorilla/mux)

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Return handling

The error return value will be used to automatically set statuscode and write JSON error message with the error into the response body. If your handler has any interface{} return value set then it will be Encoded to JSON and written into the response body.

You can use both at the same time. Accepted return values:

func handler(w http.ResponseWriter, r *http.Request)
func handler(w http.ResponseWriter, r *http.Request) error
func handler(w http.ResponseWriter, r *http.Request) interface{}
func handler(w http.ResponseWriter, r *http.Request) (interface{}, error)

Example

func handler(w http.ResponseWriter, r *http.Request) error {
    return fmt.Errorf("oops... an error")
}

Status: 501 InternalServerError

{
    "error": "oops... an error"
}

---

type Result struct {
    Message string `json:"message"`
}

func handler(w http.ResponseWriter, r *http.Request) Result {
    return Result{Message: "WOW!"}
}

Status: 200 Success

{
    "message": "WOW!"
}

Arguments handling

By default you have 2 arguments but if you add your custom interface{} argument as first, it will be populated by the JSON data sent in the request body.

Accepted arguments:

func handler(w http.ResponseWriter, r *http.Request)
func handler(i interface{}, w http.ResponseWriter, r *http.Request)

Example

type Result struct {
    Message string `json:"message"`
}

func handler(res *Result, w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, res.Message)
}

Request body data:

{
    "message": "WOW!"
}

Status: 200 Success

WOW!

Usage

Wrap your existing handlers in restio.Endpoint(..handler..) and that's all.

Example

r := mux.NewRouter()

r.Handle("/test", restio.Endpoint(testHandler)).Methods("GET")