yanic/api/lib.go

62 lines
2.0 KiB
Go

package api
import (
"bytes"
"strings"
"net/http"
"encoding/json"
"encoding/base64"
"github.com/julienschmidt/httprouter"
)
func jsonOutput(w http.ResponseWriter, r *http.Request,data interface{}){
js, err := json.Marshal(data)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
if origin := r.Header.Get("Origin"); origin != "" {
w.Header().Set("Access-Control-Allow-Origin", origin)
}
w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
w.Header().Set("Access-Control-Allow-Headers","Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
w.Header().Set("Access-Control-Allow-Credentials", "true")
w.Write(js)
}
func BasicAuth(h httprouter.Handle, pass []byte) httprouter.Handle {
return func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
if origin := r.Header.Get("Origin"); origin != "" {
w.Header().Set("Access-Control-Allow-Origin", origin)
}
w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
w.Header().Set("Access-Control-Allow-Headers","Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
w.Header().Set("Access-Control-Allow-Credentials", "true")
const basicAuthPrefix string = "Basic "
// Get the Basic Authentication credentials
auth := r.Header.Get("Authorization")
if strings.HasPrefix(auth, basicAuthPrefix) {
// Check credentials
payload, err := base64.StdEncoding.DecodeString(auth[len(basicAuthPrefix):])
if err == nil {
pair := bytes.SplitN(payload, []byte(":"), 2)
if len(pair) == 2 &&
bytes.Equal(pair[1], pass) {
// Delegate request to the given handle
h(w, r, ps)
return
}
}
}
// Request Basic Authentication otherwise
w.Header().Set("WWW-Authenticate", "Basic realm=Restricted")
http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
}
}