parsing - Invalid Json web token in Go -

i trying make json web token authentication system go cant seem parsing of web token working. error occurs in following function.

func requiretokenauthentication(rw http.responsewriter, req *http.request, next http.handlerfunc) { authbackend := initjwtauthenticationbackend()  jwtstring := req.header.get("authorization")   token, err := jwt.parse(jwtstring, func(token *jwt.token) (interface{}, error) {     if _, ok := token.method.(*jwt.signingmethodrsa); !ok {         log.println("unexpected signing method")         return nil, fmt.errorf("unexpected signing method: %v", token.header["alg"])     } else {         log.println("the token has been returned")         return authbackend.publickey, nil     } })  log.println(token) log.println(token.valid)  if err == nil && token.valid && !authbackend.isinblacklist(req.header.get("authorization")) {     next(rw, req) } else {     rw.writeheader(http.statusunauthorized)     log.p  rintln("status unauthorized requiretokenauthentication")     } } 

returns following log

[negroni] started /test/hello 2016/09/13 01:34:46 &{bearer eyjhbgcioijsuzuxmiisinr5cci6ikpxvcj9.eyjlehaioje0nzm5nzq4otasimlhdci6mtq3mzcxnty5mcwic3viijoiin0.mnwewdr8nuvdlo_4ie43me7iph2lesj1uikokgd6vjb7isjfpshn8e7eqr4gkwuiilti34_i6ijrpmx9qrpugkzvsoxx44qlfi6m7fdhvysriybbqwtcvkcpvhnsk8bhjyegy813aaxomk6skzjoaks5jyuvnnzdnqmenyj1bm6fdbgp-olhur_cjk0pym1nmhv9zli1rpjogu4mfj1t4thyzaegirpnzymamtrk6tyefe6xi4voeeadq7hxvwreg6wnsqsygww8uoaiwly1ylbhtkpmt8zfrwllylqs_uuz0xiaswo1mf2plvozz1wlf3zehls31t1egb1xl4wtnqe <nil> map[] <nil>  false} 2016/09/13 01:34:46 false 2016/09/13 01:34:46 status unauthorized requiretokenauthentication [negroni] completed 401 unauthorized in 71.628ms 

and here curl using initiate it

curl -h "authorization: bearer eyjhbgcioijsuzuxmiisinr5cci6ikpxvcj9.eyjlehaioje0nzm5nzq4otasimlhdci6mtq3mzcxnty5mcwic3viijoiin0.mnwewdr8nuvdlo_4ie43me7iph2lesj1uikokgd6vjb7isjfpshn8e7eqr4gkwuiilti34_i6ijrpmx9qrpugkzvsoxx44qlfi6m7fdhvysriybbqwtcvkcpvhnsk8bhjyegy813aaxomk6skzjoaks5jyuvnnzdnqmenyj1bm6fdbgp-olhur_cjk0pym1nmhv9zli1rpjogu4mfj1t4thyzaegirpnzymamtrk6tyefe6xi4voeeadq7hxvwreg6wnsqsygww8uoaiwly1ylbhtkpmt8zfrwllylqs_uuz0xiaswo1mf2plvozz1wlf3zehls31t1egb1xl4wtnqe" http://localhost:5000/test/hello 

i have tried curl without bearer

curl -h "authorization:eyjhbgcioijsuzuxmiisinr5cci6ikpxvcj9.eyjlehaioje0nzm5nzq4otasimlhdci6mtq3mzcxnty5mcwic3viijoiin0.mnwewdr8nuvdlo_4ie43me7iph2lesj1uikokgd6vjb7isjfpshn8e7eqr4gkwuiilti34_i6ijrpmx9qrpugkzvsoxx44qlfi6m7fdhvysriybbqwtcvkcpvhnsk8bhjyegy813aaxomk6skzjoaks5jyuvnnzdnqmenyj1bm6fdbgp-olhur_cjk0pym1nmhv9zli1rpjogu4mfj1t4thyzaegirpnzymamtrk6tyefe6xi4voeeadq7hxvwreg6wnsqsygww8uoaiwly1ylbhtkpmt8zfrwllylqs_uuz0xiaswo1mf2plvozz1wlf3zehls31t1egb1xl4wtnqe" http://localhost:5000/test/hello 

the error occurring because token invalid token.valid = false have generated using following process.

here router

router.handlefunc("/token-auth", controllers.login).methods("post") 

here login controller

    func login(w http.responsewriter, r *http.request) {     requestuser := new(models.user)     decoder := json.newdecoder(r.body)     decoder.decode(&requestuser)         responsestatus, token := utils.login(requestuser) //here util file seen below used     w.header().set("content-type", "application/json")     w.writeheader(responsestatus)     w.write(token)  } 

this util file

    func login(requestuser *models.user) (int, []byte) {         authbackend := authentication.initjwtauthenticationbackend()          if authbackend.authenticate(requestuser) {             token, err := authbackend.generatetoken(requestuser.uuid)             if err != nil {                 return http.statusinternalservererror, []byte("")             } else {                 response, _ := json.marshal(parameters.tokenauthentication{token})                 return http.statusok, response             }         }         return http.statusunauthorized, []byte("")     } 

and here method used generate token

    func (backend *jwtauthenticationbackend) generatetoken(useruuid string) (string, error) {     token := jwt.new(jwt.signingmethodrs512)      claims := token.claims.(jwt.mapclaims)      claims["exp"] = time.now().add(time.hour * time.duration(settings.get().jwtexpirationdelta)).unix()     claims["iat"] = time.now().unix()     claims["sub"] = useruuid      tokenstring, err := token.signedstring(backend.privatekey)     if err != nil {         panic(err)         return "", err     }      return tokenstring, nil } 

how fix token parsing system token valid? if need additional information more happy make edit respective information. thank

the error returned jwt.parse() says

tokenstring should not contain 'bearer '

so if remove "bearer ":

jwtstring = strings.split(jwtstring, "bearer ")[1] 

you bit further

the token has been returned

however there's new error:

key of invalid type

sorry it's not complete answer!