77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
package core
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import (
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"context"
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"net/http"
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"github.com/gorilla/sessions"
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"github.com/kirsle/blog/core/models/users"
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)
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type key int
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const (
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sessionKey key = iota
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userKey
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)
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// SessionLoader gets the Gorilla session store and makes it available on the
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// Request context.
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func (b *Blog) SessionLoader(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
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session, _ := b.store.Get(r, "session")
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log.Debug("REQUEST START: %s %s", r.Method, r.URL.Path)
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ctx := context.WithValue(r.Context(), sessionKey, session)
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next(w, r.WithContext(ctx))
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}
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// Session returns the current request's session.
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func (b *Blog) Session(r *http.Request) *sessions.Session {
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ctx := r.Context()
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if session, ok := ctx.Value(sessionKey).(*sessions.Session); ok {
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return session
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}
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log.Error(
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"Session(): didn't find session in request context! Getting it " +
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"from the session store instead.",
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)
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session, _ := b.store.Get(r, "session")
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return session
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}
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// AuthMiddleware loads the user's authentication state.
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func (b *Blog) AuthMiddleware(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
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session := b.Session(r)
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log.Debug("AuthMiddleware() -- session values: %v", session.Values)
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if loggedIn, ok := session.Values["logged-in"].(bool); ok && loggedIn {
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// They seem to be logged in. Get their user object.
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id := session.Values["user-id"].(int)
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u, err := users.Load(id)
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if err != nil {
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log.Error("Error loading user ID %d from session: %v", id, err)
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next(w, r)
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return
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}
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ctx := context.WithValue(r.Context(), userKey, u)
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next(w, r.WithContext(ctx))
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return
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}
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next(w, r)
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}
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// LoginRequired is a middleware that requires a logged-in user.
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func (b *Blog) LoginRequired(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
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ctx := r.Context()
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if user, ok := ctx.Value(userKey).(*users.User); ok {
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if user.ID > 0 {
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next(w, r)
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return
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}
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}
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log.Info("Redirect away!")
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b.Redirect(w, "/login?next="+r.URL.Path)
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}
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