/
api.go
81 lines (71 loc) · 2.08 KB
/
api.go
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// Golang SwaggerUI
//
//
// Schemes: https, http
// BasePath: /api
// Version: 1.0.0
//
// Consumes:
// - application/json
//
// Produces:
// - application/json
//
// swagger:meta
package rest
import (
"encoding/json"
"net/http"
"github.com/go-http-utils/etag"
"github.com/julienschmidt/httprouter"
"github.com/sirupsen/logrus"
)
// API def
type API struct {
Router *httprouter.Router
Log *logrus.Logger
}
// NewAPI ...
func NewAPI(router *httprouter.Router, logger *logrus.Logger) *API {
return &API{
Log: logger,
Router: router,
}
}
// ListenAndServe always returns a non-nil error.
func (api *API) ListenAndServe(addr string) error {
m := NewMiddleware(api.Router, api.Log, "Log requests")
et := etag.Handler(m, false)
return http.ListenAndServe(addr, et)
}
// The type of our middleware consists of the original handler we want to wrap and a message
type Middleware struct {
next http.Handler
message string
log *logrus.Logger
}
// Make a constructor for our middleware type since its fields are not exported (in lowercase)
func NewMiddleware(next http.Handler, logger *logrus.Logger, message string) *Middleware {
return &Middleware{next: next, message: message, log: logger}
}
// Our middleware handler
func (m *Middleware) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// We can modify the request here; for simplicity, we will just log a message
m.log.Debugf("msg: %s, Method: %s, URI: %s\n", m.message, r.Method, r.RequestURI)
setSecuirtyHeaders(w)
m.next.ServeHTTP(w, r)
// We can modify the response here
}
func setSecuirtyHeaders(w http.ResponseWriter) {
w.Header().Set("Strict-Transport-Security", "max-age=31536000; includeSubDomains")
w.Header().Set("Referrer-Policy", "origin")
w.Header().Set("X-Content-Type-Options", "nosniff")
}
// WriteJSONResponse to response writer
func (*API) WriteJSONResponse(w http.ResponseWriter, status int, response interface{}) {
w.Header().Set("Content-Type", "application/json; charset=UTF-8")
w.WriteHeader(status)
if err := json.NewEncoder(w).Encode(response); err != nil {
panic(err)
}
}