func NoTransactionFilter(ctx maze.IContext) error {
return TM.NoTransaction(func(DB db.IDb) error {
appCtx := ctx.(*AppCtx)
appCtx.Store = DB
return ctx.Proceed()
})
}
func TransactionFilter(ctx maze.IContext) error {
return TM.Transaction(func(DB db.IDb) error {
appCtx := ctx.(*AppCtx)
appCtx.Store = DB
p := appCtx.Principal
if p != nil {
appCtx.Store.SetAttribute(entity.ATTR_USERID, p.UserId)
}
return ctx.Proceed()
})
}
func PingFilter(ctx maze.IContext) error {
ctx.GetResponse().Header().Set("Content-Type", "text/html; charset=utf-8")
// TODO what happens if this is called right after the user submited a password change
// and the reply was not yet delivered/processed
app := ctx.(*AppCtx)
p := app.Principal
// check if version is valid - if the user changed the password the version changes
var uid int64
store := app.Store
ok, err := store.Query(T.USER).Column(T.USER_C_ID).
Where(T.USER_C_ID.Matches(p.UserId).And(T.USER_C_VERSION.Matches(p.Version))).
SelectInto(&uid)
if !ok {
// version is different
logger.Debugf("Unable to revalidate the token, because the user no longer exists or it was changed (different version)")
http.Error(ctx.GetResponse(), "Unauthorized", http.StatusUnauthorized)
return nil
} else if err != nil {
return err
}
tokenString, err := serializePrincipal(p)
if err != nil {
return err
}
ctx.GetResponse().Write([]byte(tokenString))
return nil
}
func AuthenticationFilter(ctx maze.IContext) error {
p := deserializePrincipal(ctx.GetRequest())
if p != nil {
// for authorizations and business logic
ctx.(*AppCtx).Principal = p
return ctx.Proceed()
} else {
logger.Debugf("Unable to proceed: invalid token!")
http.Error(ctx.GetResponse(), "Unauthorized", http.StatusUnauthorized)
}
return nil
}
func LoginFilter(ctx maze.IContext) error {
ctx.GetResponse().Header().Set("Content-Type", "text/html; charset=utf-8")
//logger.Debugf("serving static(): " + ctx.GetRequest().URL.Path)
username := ctx.GetRequest().FormValue("username")
pass := ctx.GetRequest().FormValue("password")
var err error
if username != "" && pass != "" {
store := ctx.(*AppCtx).Store
// usernames are stored in lowercase
username = strings.ToLower(username)
var user entity.User
var ok bool
if ok, err = store.Query(T.USER).
All().
Inner(T.USER_A_ROLES).Fetch().
Where(
db.And(T.USER_C_USERNAME.Matches(username),
T.USER_C_PASSWORD.Matches(pass))).
SelectTree(&user); ok && err == nil {
// role array
roles := make([]lov.ERole, len(user.Roles))
for k, v := range user.Roles {
roles[k] = v.Kind
}
tokenString, err := serializePrincipal(&Principal{
*user.Id,
*user.Username,
roles,
*user.Version,
})
if err != nil {
return err
}
ctx.GetResponse().Write([]byte(tokenString))
}
}
return err
}
// Limit limits the body of a post, compress response and format eventual errors
func Limit(ctx maze.IContext) (err error) {
r := ctx.GetRequest()
// https only -- redirect in openshift
if HttpsOnly && !isHttps(r) {
url := "https://" + r.Host + r.RequestURI
logger.Debugf("redirecting to %s", url)
http.Redirect(ctx.GetResponse(), r, url, http.StatusMovedPermanently)
return
}
/*
Very Important: Before compressing the response, the "Content-Type" header must be properly set!
*/
// encodes only text files
var zip bool
var ext = filepath.Ext(r.URL.Path)
for _, v := range zipexts {
if v == ext {
zip = true
break
}
}
// TODO gzip encoding should occour only after a size threshold
if zip && strings.Contains(fmt.Sprint(r.Header["Accept-Encoding"]), "gzip") {
appCtx := ctx.(*AppCtx)
w := appCtx.Response
w.Header().Set("Content-Encoding", "gzip")
// Get a Writer from the Pool
gz := zippers.Get().(*gzip.Writer)
// When done, put the Writer back in to the Pool
defer zippers.Put(gz)
// We use Reset to set the writer we want to use.
gz.Reset(w)
defer gz.Close()
appCtx.Response = gzipResponseWriter{Writer: gz, ResponseWriter: w}
}
defer func() {
if r := recover(); r != nil {
if e, ok := r.(runtime.Error); ok {
logger.Errorf("%s\n========== Begin Stack Trace ==========\n%s\n========== End Stack Trace ==========\n", e, debug.Stack())
}
err = formatError(ctx.GetResponse(), r.(error))
}
}()
logger.Debugf("requesting %s", r.URL.Path)
r.Body = http.MaxBytesReader(ctx.GetResponse(), r.Body, postLimit)
err = ctx.Proceed()
if err != nil {
err = formatError(ctx.GetResponse(), err)
}
return err
}