3:07 a.m.
Hello Bela,
what framework or library are you using in your Go Web App? The thing is,
there is no such thing as a "single" Keycloak integration,
due to the myriads of web frameworks available for Go.
Of course most of them support a Servlet Filter like middleware pattern (as
shown below) that could be implemented somewhat generic but in the end you
probably
need an integration that is custom to your framework.
I just started to adding support for Keycloak to
https://github.com/stretchr/gomniauth but the library is missing a bit of
functionality such as logout etc.
There is https://github.com/gambol99/keycloak-proxy where you could look
for the OIDC protocol interaction create your own implementation.
Another option would be to just use an OIDC go client implementation like:
https://github.com/coreos/go-oidc or https://github.com/ericchiang/oidc
Cheers,
Thomas
package main
import (
"flag"
"fmt"
"github.com/gorilla/mux"
"log"
"net/http"
"net/http/httputil"
"os"
"time"
)
var greeting string
func main() {
flag.StringVar(&greeting, "g", "Hello", "The greeting
message, defaults to
'Hello'")
flag.Parse()
logger := *log.New(os.Stdout, "logger: ", log.Lshortfile)
router := mux.NewRouter()
router.Handle("/greet", http.HandlerFunc(greet))
//for all routes apply the follwing list of handlers
http.Handle("/", Adapt(router,
WithLogger(&logger),
WithRequestTracing(),
WithHeaders(map[string]string{"foo": "42", "bar":
"1337"}),
))
http.ListenAndServe(":8080", nil)
}
// Adapter wraps an http.Handler with Additional functionality.
type Adapter func(http.Handler) http.Handler
// Adapt h with all specified adapters.
func Adapt(h http.Handler, adapters ...Adapter) http.Handler {
// apply handler backwards so that they are executed in declared order
for i := len(adapters) - 1; i >= 0; i-- {
h = adapters[i](h)
}
return h
}
// curl -v http://localhost:8080/greet
func greet(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, greeting+" %v\n", time.Now().String())
}
func WithRequestTracing() Adapter {
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
dump, err := httputil.DumpRequest(r, true)
if err != nil {
http.Error(w, fmt.Sprint(err), http.StatusInternalServerError)
return
}
fmt.Printf("Request Dump:\n%q\n", dump)
h.ServeHTTP(w, r)
})
}
}
func WithHeaders(headers map[string]string) Adapter {
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
for key, value := range headers {
w.Header().Add(key, value)
}
h.ServeHTTP(w, r)
})
}
}
func WithLogger(l *log.Logger) Adapter {
return func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
l.Println(r.Method, r.URL.Path)
h.ServeHTTP(w, r)
})
}
}
2018-03-05 0:48 GMT+01:00 Bela Berde <bela.berde(a)gmail.com>:
Hi,
Is there someone who successfully connected Keycloak to a Golang
Frontend-Backend?
Many thanks.
Cheers
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