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handler.go
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handler.go
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package auth
import (
"errors"
"fmt"
"net/http"
"path"
"strings"
"time"
"github.com/go-chi/render"
validation "github.com/go-ozzo/ozzo-validation"
"github.com/go-ozzo/ozzo-validation/is"
"github.com/mssola/user_agent"
uuid "github.com/satori/go.uuid"
"github.com/dhax/go-base/email"
)
// The list of error types presented to the end user as error message.
var (
ErrInvalidLogin = errors.New("invalid email address")
ErrUnknownLogin = errors.New("email not registered")
ErrLoginDisabled = errors.New("login for account disabled")
ErrLoginToken = errors.New("invalid or expired login token")
)
type loginRequest struct {
Email string
}
func (body *loginRequest) Bind(r *http.Request) error {
body.Email = strings.TrimSpace(body.Email)
body.Email = strings.ToLower(body.Email)
return validation.ValidateStruct(body,
validation.Field(&body.Email, validation.Required, is.Email),
)
}
func (rs *Resource) login(w http.ResponseWriter, r *http.Request) {
body := &loginRequest{}
if err := render.Bind(r, body); err != nil {
log(r).WithField("email", body.Email).Warn(err)
render.Render(w, r, ErrUnauthorized(ErrInvalidLogin))
return
}
acc, err := rs.store.GetByEmail(body.Email)
if err != nil {
log(r).WithField("email", body.Email).Warn(err)
render.Render(w, r, ErrUnauthorized(ErrUnknownLogin))
return
}
if !acc.CanLogin() {
render.Render(w, r, ErrUnauthorized(ErrLoginDisabled))
return
}
lt := rs.Login.CreateToken(acc.ID)
go func() {
content := email.ContentLoginToken{
Email: acc.Email,
Name: acc.Name,
URL: path.Join(rs.Login.loginURL, lt.Token),
Token: lt.Token,
Expiry: lt.Expiry,
}
if err := rs.mailer.LoginToken(acc.Name, acc.Email, content); err != nil {
log(r).WithField("module", "email").Error(err)
}
}()
render.Respond(w, r, http.NoBody)
}
type tokenRequest struct {
Token string `json:"token"`
}
type tokenResponse struct {
Access string `json:"access_token"`
Refresh string `json:"refresh_token"`
}
func (body *tokenRequest) Bind(r *http.Request) error {
body.Token = strings.TrimSpace(body.Token)
return validation.ValidateStruct(body,
validation.Field(&body.Token, validation.Required, is.Alphanumeric),
)
}
func (rs *Resource) token(w http.ResponseWriter, r *http.Request) {
body := &tokenRequest{}
if err := render.Bind(r, body); err != nil {
log(r).Warn(err)
render.Render(w, r, ErrUnauthorized(ErrLoginToken))
return
}
id, err := rs.Login.GetAccountID(body.Token)
if err != nil {
render.Render(w, r, ErrUnauthorized(ErrLoginToken))
return
}
acc, err := rs.store.GetByID(id)
if err != nil {
// account deleted before login token expired
render.Render(w, r, ErrUnauthorized(ErrUnknownLogin))
return
}
if !acc.CanLogin() {
render.Render(w, r, ErrUnauthorized(ErrLoginDisabled))
return
}
ua := user_agent.New(r.UserAgent())
browser, _ := ua.Browser()
token := &Token{
Token: uuid.NewV4().String(),
Expiry: time.Now().Add(rs.Token.jwtRefreshExpiry),
UpdatedAt: time.Now(),
AccountID: acc.ID,
Mobile: ua.Mobile(),
Identifier: fmt.Sprintf("%s on %s", browser, ua.OS()),
}
if err := rs.store.SaveRefreshToken(token); err != nil {
log(r).Error(err)
render.Render(w, r, ErrInternalServerError)
return
}
access, refresh, err := rs.Token.GenTokenPair(acc.Claims(), token.Claims())
if err != nil {
log(r).Error(err)
render.Render(w, r, ErrInternalServerError)
return
}
acc.LastLogin = time.Now()
if err := rs.store.UpdateAccount(acc); err != nil {
log(r).Error(err)
render.Render(w, r, ErrInternalServerError)
return
}
render.Respond(w, r, &tokenResponse{
Access: access,
Refresh: refresh,
})
}
func (rs *Resource) refresh(w http.ResponseWriter, r *http.Request) {
rt := RefreshTokenFromCtx(r.Context())
acc, token, err := rs.store.GetByRefreshToken(rt)
if err != nil {
render.Render(w, r, ErrUnauthorized(errTokenExpired))
return
}
if time.Now().After(token.Expiry) {
rs.store.DeleteRefreshToken(token)
render.Render(w, r, ErrUnauthorized(errTokenExpired))
return
}
if !acc.CanLogin() {
render.Render(w, r, ErrUnauthorized(ErrLoginDisabled))
return
}
token.Token = uuid.NewV4().String()
token.Expiry = time.Now().Add(rs.Token.jwtRefreshExpiry)
token.UpdatedAt = time.Now()
access, refresh, err := rs.Token.GenTokenPair(acc.Claims(), token.Claims())
if err != nil {
log(r).Error(err)
render.Render(w, r, ErrInternalServerError)
return
}
if err := rs.store.SaveRefreshToken(token); err != nil {
log(r).Error(err)
render.Render(w, r, ErrInternalServerError)
return
}
acc.LastLogin = time.Now()
if err := rs.store.UpdateAccount(acc); err != nil {
log(r).Error(err)
render.Render(w, r, ErrInternalServerError)
return
}
render.Respond(w, r, &tokenResponse{
Access: access,
Refresh: refresh,
})
}
func (rs *Resource) logout(w http.ResponseWriter, r *http.Request) {
rt := RefreshTokenFromCtx(r.Context())
_, token, err := rs.store.GetByRefreshToken(rt)
if err != nil {
render.Render(w, r, ErrUnauthorized(errTokenExpired))
return
}
rs.store.DeleteRefreshToken(token)
render.Respond(w, r, http.NoBody)
}